3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
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
55 #include "wsutil/strerror.h"
61 #include "wsutil/wsgetopt.h"
65 #include <epan/epan.h>
66 #include <epan/filesystem.h>
67 #include <wsutil/privileges.h>
68 #include <wsutil/file_util.h>
71 #include <epan/timestamp.h>
72 #include <epan/packet.h>
74 #include "disabled_protos.h"
75 #include <epan/prefs.h>
76 #include <epan/column.h>
78 #include <epan/addr_resolv.h>
80 #include "clopts_common.h"
81 #include "console_io.h"
82 #include "cmdarg_err.h"
83 #include "version_info.h"
84 #include <epan/plugins.h>
86 #include <epan/epan_dissect.h>
88 #include <epan/stat_cmd_args.h>
89 #include <epan/timestamp.h>
90 #include <epan/ex-opt.h>
93 #include "capture_ui_utils.h"
94 #include "capture_ifinfo.h"
95 #include "capture-pcap-util.h"
97 #include "capture-wpcap.h"
98 #include "capture_errs.h"
101 #include "capture_sync.h"
102 #endif /* HAVE_LIBPCAP */
104 #include <epan/funnel.h>
108 * This is the template for the decode as option; it is shared between the
109 * various functions that output the usage for this parameter.
111 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
113 static guint32 cum_bytes;
114 static nstime_t first_ts;
115 static nstime_t prev_dis_ts;
116 static nstime_t prev_cap_ts;
118 static gboolean print_packet_info; /* TRUE if we're to print packet information */
120 static gboolean perform_two_pass_analysis;
123 * The way the packet decode is to be written.
126 WRITE_TEXT, /* summary or detail text */
127 WRITE_XML, /* PDML or PSML */
128 WRITE_FIELDS /* User defined list of fields */
129 /* Add CSV and the like here */
132 static output_action_e output_action;
133 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
134 static gboolean verbose;
135 static gboolean print_hex;
136 static gboolean line_buffered;
138 static print_format_e print_format = PR_FMT_TEXT;
139 static print_stream_t *print_stream;
141 static output_fields_t* output_fields = NULL;
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts;
150 static capture_options global_capture_opts;
153 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
154 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
157 static gboolean capture(void);
158 static void report_counts(void);
160 static BOOL WINAPI capture_cleanup(DWORD);
162 static void capture_cleanup(int);
164 static void report_counts_siginfo(int);
167 #endif /* HAVE_LIBPCAP */
169 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
170 static gboolean process_packet(capture_file *cf, gint64 offset,
171 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
172 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
173 static void show_capture_file_io_error(const char *, int, gboolean);
174 static void show_print_file_io_error(int err);
175 static gboolean write_preamble(capture_file *cf);
176 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
177 static gboolean write_finale(void);
178 static const char *cf_open_error_message(int err, gchar *err_info,
179 gboolean for_writing, int file_type);
181 static void open_failure_message(const char *filename, int err,
182 gboolean for_writing);
183 static void failure_message(const char *msg_format, va_list ap);
184 static void read_failure_message(const char *filename, int err);
185 static void write_failure_message(const char *filename, int err);
190 const char *sstr; /* The short string */
191 const char *lstr; /* The long string */
195 string_compare(gconstpointer a, gconstpointer b)
197 return strcmp(((struct string_elem *)a)->sstr,
198 ((struct string_elem *)b)->sstr);
202 string_elem_print(gpointer data, gpointer not_used _U_)
204 fprintf(stderr, " %s - %s\n",
205 ((struct string_elem *)data)->sstr,
206 ((struct string_elem *)data)->lstr);
210 list_capture_types(void) {
212 struct string_elem *captypes;
215 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
217 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
218 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
219 if (wtap_dump_can_open(i)) {
220 captypes[i].sstr = wtap_file_type_short_string(i);
221 captypes[i].lstr = wtap_file_type_string(i);
222 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
225 g_slist_foreach(list, string_elem_print, NULL);
231 print_usage(gboolean print_ver)
238 "TShark " VERSION "%s\n"
239 "Dump and analyze network traffic.\n"
240 "See http://www.wireshark.org for more information.\n"
243 wireshark_svnversion, get_copyright_info());
247 fprintf(output, "\n");
248 fprintf(output, "Usage: tshark [options] ...\n");
249 fprintf(output, "\n");
252 fprintf(output, "Capture interface:\n");
253 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
254 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
255 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
256 fprintf(output, " -p don't capture in promiscuous mode\n");
257 #ifdef HAVE_PCAP_CREATE
258 fprintf(output, " -I capture in monitor mode, if available\n");
260 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
261 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
263 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
264 fprintf(output, " -D print list of interfaces and exit\n");
265 fprintf(output, " -L print list of link-layer types of iface and exit\n");
266 fprintf(output, "\n");
267 fprintf(output, "Capture stop conditions:\n");
268 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
269 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
270 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
271 fprintf(output, " files:NUM - stop after NUM files\n");
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Capture output:\n");
274 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
275 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
276 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
277 #endif /* HAVE_LIBPCAP */
279 /*fprintf(output, "\n");*/
280 fprintf(output, "Input file:\n");
281 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
283 fprintf(output, "\n");
284 fprintf(output, "Processing:\n");
285 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
286 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
287 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
288 fprintf(output, " -d %s ...\n", decode_as_arg_template);
289 fprintf(output, " \"Decode As\", see the man page for details\n");
290 fprintf(output, " Example: tcp.port==8888,http\n");
292 /*fprintf(output, "\n");*/
293 fprintf(output, "Output:\n");
294 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
295 fprintf(output, " (or to the standard output for \"-\")\n");
296 fprintf(output, " -C <config profile> start with specified configuration profile\n");
297 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
298 fprintf(output, " an empty \"-F\" option will list the file types\n");
299 fprintf(output, " -V add output of packet tree (Packet Details)\n");
300 fprintf(output, " -S display packets even when writing to a file\n");
301 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
302 fprintf(output, " -T pdml|ps|psml|text|fields\n");
303 fprintf(output, " format of text output (def: text)\n");
304 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
305 fprintf(output, " this option can be repeated to print multiple fields\n");
306 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
307 fprintf(output, " header=y|n switch headers on and off\n");
308 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
309 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
310 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
311 fprintf(output, " aggregator\n");
312 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
313 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
314 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
315 fprintf(output, " -l flush standard output after each packet\n");
316 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
317 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
318 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
320 fprintf(output, "\n");
321 fprintf(output, "Miscellaneous:\n");
322 fprintf(output, " -h display this help and exit\n");
323 fprintf(output, " -v display version info and exit\n");
324 fprintf(output, " -o <name>:<value> ... override preference setting\n");
325 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
326 fprintf(output, " -G [report] dump one of several available reports and exit\n");
327 fprintf(output, " default report=\"fields\"\n");
328 fprintf(output, " use \"-G ?\" for more help\n");
332 glossary_option_help(void)
338 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
340 fprintf(output, "\n");
341 fprintf(output, "Usage: tshark -G [report]\n");
342 fprintf(output, "\n");
343 fprintf(output, "Glossary table reports:\n");
344 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
345 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
346 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
347 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
348 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
349 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
350 fprintf(output, "\n");
351 fprintf(output, "Preference reports:\n");
352 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
353 fprintf(output, " -G currentprefs dump current preferences and exit\n");
354 fprintf(output, "\n");
359 * For a dissector table, print on the stream described by output,
360 * its short name (which is what's used in the "-d" option) and its
364 display_dissector_table_names(const char *table_name, const char *ui_name,
367 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
371 * For a dissector handle, print on the stream described by output,
372 * the filter name (which is what's used in the "-d" option) and the full
373 * name for the protocol that corresponds to this handle.
376 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
379 const gchar* proto_filter_name;
380 const gchar* proto_ui_name;
382 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
384 if (proto_id != -1) {
385 proto_filter_name = proto_get_protocol_filter_name(proto_id);
386 proto_ui_name = proto_get_protocol_name(proto_id);
387 g_assert(proto_filter_name != NULL);
388 g_assert(proto_ui_name != NULL);
390 fprintf((FILE *)output, "\t%s (%s)\n",
397 * The protocol_name_search structure is used by find_protocol_name_func()
398 * to pass parameters and store results
400 struct protocol_name_search{
401 gchar *searched_name; /* Protocol filter name we are looking for */
402 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
403 guint nb_match; /* How many dissectors matched searched_name */
405 typedef struct protocol_name_search *protocol_name_search_t;
408 * This function parses all dissectors associated with a table to find the
409 * one whose protocol has the specified filter name. It is called
410 * as a reference function in a call to dissector_table_foreach_handle.
411 * The name we are looking for, as well as the results, are stored in the
412 * protocol_name_search struct pointed to by user_data.
413 * If called using dissector_table_foreach_handle, we actually parse the
414 * whole list of dissectors.
417 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
421 const gchar *protocol_filter_name;
422 protocol_name_search_t search_info;
426 search_info = (protocol_name_search_t)user_data;
428 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
429 if (proto_id != -1) {
430 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
431 g_assert(protocol_filter_name != NULL);
432 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
434 if (search_info->nb_match == 0) {
435 /* Record this handle only if this is the first match */
436 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
438 search_info->nb_match++;
444 * Print all layer type names supported.
445 * We send the output to the stream described by the handle output.
449 fprint_all_layer_types(FILE *output)
452 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
456 * Print all protocol names supported for a specific layer type.
457 * table_name contains the layer type name in which the search is performed.
458 * We send the output to the stream described by the handle output.
462 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
465 dissector_table_foreach_handle(table_name,
466 display_dissector_names,
471 * The function below parses the command-line parameters for the decode as
472 * feature (a string pointer by cl_param).
473 * It checks the format of the command-line, searches for a matching table
474 * and dissector. If a table/dissector match is not found, we display a
475 * summary of the available tables/dissectors (on stderr) and return FALSE.
476 * If everything is fine, we get the "Decode as" preference activated,
477 * then we return TRUE.
480 add_decode_as(const gchar *cl_param)
484 gchar *decoded_param;
485 gchar *remaining_param;
487 gchar *dissector_str;
488 dissector_handle_t dissector_matching;
489 dissector_table_t table_matching;
490 ftenum_t dissector_table_selector_type;
491 struct protocol_name_search user_protocol_name;
493 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
496 decoded_param = g_strdup(cl_param);
497 g_assert(decoded_param);
500 /* The lines below will parse this string (modifying it) to extract all
501 necessary information. Note that decoded_param is still needed since
502 strings are not copied - we just save pointers. */
504 /* This section extracts a layer type (table_name) from decoded_param */
505 table_name = decoded_param; /* Layer type string starts from beginning */
507 remaining_param = strchr(table_name, '=');
508 if (remaining_param == NULL) {
509 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
510 /* If the argument does not follow the template, carry on anyway to check
511 if the table name is at least correct. If remaining_param is NULL,
512 we'll exit anyway further down */
515 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
518 /* Remove leading and trailing spaces from the table name */
519 while ( table_name[0] == ' ' )
521 while ( table_name[strlen(table_name) - 1] == ' ' )
522 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
524 /* The following part searches a table matching with the layer type specified */
525 table_matching = NULL;
527 /* Look for the requested table */
528 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
529 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
532 table_matching = find_dissector_table(table_name);
533 if (!table_matching) {
534 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
538 if (!table_matching) {
539 /* Display a list of supported layer types to help the user, if the
540 specified layer type was not found */
541 cmdarg_err("Valid layer types are:");
542 fprint_all_layer_types(stderr);
544 if (remaining_param == NULL || !table_matching) {
545 /* Exit if the layer type was not found, or if no '=' separator was found
547 g_free(decoded_param);
551 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
552 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
555 remaining_param++; /* Move to the second '=' */
556 *remaining_param = '\0'; /* Remove the second '=' */
558 remaining_param++; /* Position after the layer type string */
560 /* This section extracts a selector value (selector_str) from decoded_param */
562 selector_str = remaining_param; /* Next part starts with the selector number */
564 remaining_param = strchr(selector_str, ',');
565 if (remaining_param == NULL) {
566 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
567 /* If the argument does not follow the template, carry on anyway to check
568 if the selector value is at least correct. If remaining_param is NULL,
569 we'll exit anyway further down */
572 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
575 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
577 switch (dissector_table_selector_type) {
583 /* The selector for this table is an unsigned number. Parse it as such.
584 There's no need to remove leading and trailing spaces from the
585 selector number string, because sscanf will do that for us. */
586 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
587 cmdarg_err("Invalid selector number \"%s\"", selector_str);
588 g_free(decoded_param);
596 /* The selector for this table is a string. */
600 /* There are currently no dissector tables with any types other
601 than the ones listed above. */
602 g_assert_not_reached();
605 if (remaining_param == NULL) {
606 /* Exit if no ',' separator was found (see above) */
607 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
608 fprint_all_protocols_for_layer_types(stderr, table_name);
609 g_free(decoded_param);
613 remaining_param++; /* Position after the selector number string */
615 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
617 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
619 /* Remove leading and trailing spaces from the dissector name */
620 while ( dissector_str[0] == ' ' )
622 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
623 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
625 dissector_matching = NULL;
627 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
628 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 */
629 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
632 user_protocol_name.nb_match = 0;
633 user_protocol_name.searched_name = dissector_str;
634 user_protocol_name.matched_handle = NULL;
636 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 */
638 if (user_protocol_name.nb_match != 0) {
639 dissector_matching = user_protocol_name.matched_handle;
640 if (user_protocol_name.nb_match > 1) {
641 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
645 /* OK, check whether the problem is that there isn't any such
646 protocol, or that there is but it's not specified as a protocol
647 that's valid for that dissector table.
648 Note, we don't exit here, but dissector_matching will remain NULL,
650 if (proto_get_id_by_filter_name(dissector_str) == -1) {
651 /* No such protocol */
652 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
654 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
655 dissector_str, table_name);
660 if (!dissector_matching) {
661 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
662 fprint_all_protocols_for_layer_types(stderr, table_name);
663 g_free(decoded_param);
667 /* This is the end of the code that parses the command-line options.
668 All information is now stored in the variables:
672 The above variables that are strings are still pointing to areas within
673 decoded_parm. decoded_parm thus still needs to be kept allocated in
674 until we stop needing these variables
675 decoded_param will be deallocated at each exit point of this function */
678 /* We now have a pointer to the handle for the requested dissector
679 (requested protocol) inside the variable dissector_matching */
680 switch (dissector_table_selector_type) {
686 /* The selector for this table is an unsigned number. */
687 dissector_change_uint(table_name, selector, dissector_matching);
693 /* The selector for this table is a string. */
694 dissector_change_string(table_name, selector_str, dissector_matching);
698 /* There are currently no dissector tables with any types other
699 than the ones listed above. */
700 g_assert_not_reached();
702 g_free(decoded_param); /* "Decode As" rule has been successfully added */
707 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
708 const gchar *message, gpointer user_data)
710 /* ignore log message, if log_level isn't interesting based
711 upon the console log preferences.
712 If the preferences haven't been loaded loaded yet, display the
715 The default console_log_level preference value is such that only
716 ERROR, CRITICAL and WARNING level messages are processed;
717 MESSAGE, INFO and DEBUG level messages are ignored.
719 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
720 ERROR and CRITICAL level messages so the current code is a behavioral
721 change. The current behavior is the same as in Wireshark.
723 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
724 prefs.console_log_level != 0) {
728 g_log_default_handler(log_domain, log_level, message, user_data);
733 output_file_description(const char *fname)
735 char *save_file_string;
737 /* Get a string that describes what we're writing to */
738 if (strcmp(fname, "-") == 0) {
739 /* We're writing to the standard output */
740 save_file_string = g_strdup("standard output");
742 /* We're writing to a file with the name in save_file */
743 save_file_string = g_strdup_printf("file \"%s\"", fname);
745 return save_file_string;
749 print_current_user(void) {
750 gchar *cur_user, *cur_group;
751 if (started_with_special_privs()) {
752 cur_user = get_cur_username();
753 cur_group = get_cur_groupname();
754 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
755 cur_user, cur_group);
758 if (running_with_special_privs()) {
759 fprintf(stderr, " This could be dangerous.");
761 fprintf(stderr, "\n");
766 check_capture_privs(void) {
769 /* Warn the user if npf.sys isn't loaded. */
770 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
771 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
772 "capturing or\nlisting interfaces.\n");
778 show_version(GString *comp_info_str, GString *runtime_info_str)
780 printf("TShark " VERSION "%s\n"
787 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
788 runtime_info_str->str);
792 main(int argc, char *argv[])
794 char *init_progfile_dir_error;
796 gboolean arg_error = FALSE;
804 char *gpf_path, *pf_path;
805 char *gdp_path, *dp_path;
806 int gpf_open_errno, gpf_read_errno;
807 int pf_open_errno, pf_read_errno;
808 int gdp_open_errno, gdp_read_errno;
809 int dp_open_errno, dp_read_errno;
813 gboolean list_link_layer_types = FALSE;
814 gboolean start_capture = FALSE;
819 gboolean capture_option_specified = FALSE;
821 gboolean quiet = FALSE;
822 int out_file_type = WTAP_FILE_PCAP;
823 gboolean out_file_name_res = FALSE;
824 gchar *cf_name = NULL, *rfilter = NULL;
825 #ifdef HAVE_PCAP_OPEN_DEAD
826 struct bpf_program fcode;
828 dfilter_t *rfcode = NULL;
831 GLogLevelFlags log_flags;
835 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
836 #define OPTSTRING_B "B:"
838 #define OPTSTRING_B ""
839 #endif /* _WIN32 or HAVE_PCAP_CREATE */
840 #else /* HAVE_LIBPCAP */
841 #define OPTSTRING_B ""
842 #endif /* HAVE_LIBPCAP */
844 #ifdef HAVE_PCAP_CREATE
845 #define OPTSTRING_I "I"
847 #define OPTSTRING_I ""
850 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:pPqr:R:s:St:T:u:vVw:W:xX:y:z:"
852 static const char optstring[] = OPTSTRING;
855 /* Convert our arg list to UTF-8. */
856 wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
857 if (wc_argv && wc_argc == argc) {
858 for (i = 0; i < argc; i++) {
859 argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
861 } /* XXX else bail because something is horribly, horribly wrong? */
865 * Get credential information for later use.
867 init_process_policies();
870 * Attempt to get the pathname of the executable file.
872 init_progfile_dir_error = init_progfile_dir(argv[0], main);
873 if (init_progfile_dir_error != NULL) {
874 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
875 init_progfile_dir_error);
879 * In order to have the -X opts assigned before the wslua machine starts
880 * we need to call getopts before epan_init() gets called.
883 optind_initial = optind;
885 while ((opt = getopt(argc, argv, optstring)) != -1) {
887 case 'C': /* Configuration Profile */
888 if (profile_exists (optarg, FALSE)) {
889 set_profile_name (optarg);
891 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
903 optind = optind_initial;
908 /** Send All g_log messages to our own handler **/
912 G_LOG_LEVEL_CRITICAL|
917 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
919 g_log_set_handler(NULL,
921 tshark_log_handler, NULL /* user_data */);
922 g_log_set_handler(LOG_DOMAIN_MAIN,
924 tshark_log_handler, NULL /* user_data */);
927 g_log_set_handler(LOG_DOMAIN_CAPTURE,
929 tshark_log_handler, NULL /* user_data */);
930 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
932 tshark_log_handler, NULL /* user_data */);
935 initialize_funnel_ops();
938 capture_opts_init(&global_capture_opts, &cfile);
941 timestamp_set_type(TS_RELATIVE);
942 timestamp_set_precision(TS_PREC_AUTO);
943 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
945 /* Register all dissectors; we must do this before checking for the
946 "-G" flag, as the "-G" flag dumps information registered by the
947 dissectors, and we must do it before we read the preferences, in
948 case any dissectors register preferences. */
949 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
950 failure_message, open_failure_message, read_failure_message,
951 write_failure_message);
953 /* Register all tap listeners; we do this before we parse the arguments,
954 as the "-z" argument can specify a registered tap. */
956 /* we register the plugin taps before the other taps because
957 stats_tree taps plugins will be registered as tap listeners
958 by stats_tree_stat.c and need to registered before that */
960 register_all_plugin_tap_listeners();
962 register_all_tap_listeners();
964 /* Now register the preferences for any non-dissector modules.
965 We must do that before we read the preferences as well. */
966 prefs_register_modules();
968 /* If invoked with the "-G" flag, we dump out information based on
969 the argument to the "-G" flag; if no argument is specified,
970 for backwards compatibility we dump out a glossary of display
973 XXX - we do this here, for now, to support "-G" with no arguments.
974 If none of our build or other processes uses "-G" with no arguments,
975 we can just process it with the other arguments. */
976 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
977 proto_initialize_all_prefixes();
980 proto_registrar_dump_fields(1);
982 if (strcmp(argv[2], "fields") == 0)
983 proto_registrar_dump_fields(1);
984 else if (strcmp(argv[2], "fields2") == 0)
985 proto_registrar_dump_fields(2);
986 else if (strcmp(argv[2], "fields3") == 0)
987 proto_registrar_dump_fields(3);
988 else if (strcmp(argv[2], "protocols") == 0)
989 proto_registrar_dump_protocols();
990 else if (strcmp(argv[2], "values") == 0)
991 proto_registrar_dump_values();
992 else if (strcmp(argv[2], "decodes") == 0)
993 dissector_dump_decodes();
994 else if (strcmp(argv[2], "defaultprefs") == 0)
996 else if (strcmp(argv[2], "?") == 0)
997 glossary_option_help();
998 else if (strcmp(argv[2], "-?") == 0)
999 glossary_option_help();
1000 else if (strcmp(argv[2], "currentprefs") == 0) {
1001 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1002 &pf_open_errno, &pf_read_errno, &pf_path);
1005 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1012 /* Set the C-language locale to the native environment. */
1013 setlocale(LC_ALL, "");
1015 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1016 &pf_open_errno, &pf_read_errno, &pf_path);
1017 if (gpf_path != NULL) {
1018 if (gpf_open_errno != 0) {
1019 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1020 pf_path, strerror(gpf_open_errno));
1022 if (gpf_read_errno != 0) {
1023 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1024 pf_path, strerror(gpf_read_errno));
1027 if (pf_path != NULL) {
1028 if (pf_open_errno != 0) {
1029 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1030 strerror(pf_open_errno));
1032 if (pf_read_errno != 0) {
1033 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1034 pf_path, strerror(pf_read_errno));
1040 /* Set the name resolution code's flags from the preferences. */
1041 gbl_resolv_flags = prefs_p->name_resolve;
1043 /* Read the disabled protocols file. */
1044 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1045 &dp_path, &dp_open_errno, &dp_read_errno);
1046 if (gdp_path != NULL) {
1047 if (gdp_open_errno != 0) {
1048 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1049 gdp_path, strerror(gdp_open_errno));
1051 if (gdp_read_errno != 0) {
1052 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1053 gdp_path, strerror(gdp_read_errno));
1057 if (dp_path != NULL) {
1058 if (dp_open_errno != 0) {
1060 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1061 strerror(dp_open_errno));
1063 if (dp_read_errno != 0) {
1065 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1066 strerror(dp_read_errno));
1071 check_capture_privs();
1073 cap_file_init(&cfile);
1075 /* Print format defaults to this. */
1076 print_format = PR_FMT_TEXT;
1078 output_fields = output_fields_new();
1080 /* Now get our args */
1081 while ((opt = getopt(argc, argv, optstring)) != -1) {
1083 case 'a': /* autostop criteria */
1084 case 'b': /* Ringbuffer option */
1085 case 'c': /* Capture x packets */
1086 case 'f': /* capture filter */
1087 case 'i': /* Use interface x */
1088 case 'p': /* Don't capture in promiscuous mode */
1089 #ifdef HAVE_PCAP_CREATE
1090 case 'I': /* Capture in monitor mode, if available */
1092 case 's': /* Set the snapshot (capture) length */
1093 case 'w': /* Write to capture file x */
1094 case 'y': /* Set the pcap data link type */
1095 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1096 case 'B': /* Buffer size */
1097 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1099 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1104 capture_option_specified = TRUE;
1109 /* Configuration profile settings were already processed just ignore them this time*/
1111 case 'd': /* Decode as rule */
1112 if (!add_decode_as(optarg))
1115 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1116 case 'K': /* Kerberos keytab file */
1117 read_keytab_file(optarg);
1120 case 'D': /* Print a list of capture devices and exit */
1122 if_list = capture_interface_list(&err, &err_str);
1123 if (if_list == NULL) {
1125 case CANT_GET_INTERFACE_LIST:
1126 cmdarg_err("%s", err_str);
1130 case NO_INTERFACES_FOUND:
1131 cmdarg_err("There are no interfaces on which a capture can be done");
1136 capture_opts_print_interfaces(if_list);
1137 free_interface_list(if_list);
1140 capture_option_specified = TRUE;
1146 output_fields_add(output_fields, optarg);
1150 if(!output_fields_set_option(output_fields, optarg)) {
1151 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1152 output_fields_list_options(stderr);
1157 out_file_type = wtap_short_string_to_file_type(optarg);
1158 if (out_file_type < 0) {
1159 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1160 list_capture_types();
1164 case 'W': /* Select extra information to save in our capture file */
1165 /* This is patterned after the -N flag which may not be the best idea. */
1166 if (strchr(optarg, 'n'))
1167 out_file_name_res = TRUE;
1169 case 'H': /* Read address to name mappings from a hosts file */
1170 if (! read_hosts_file(optarg))
1172 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1175 out_file_name_res = TRUE;
1178 case 'h': /* Print help and exit */
1182 case 'l': /* "Line-buffer" standard output */
1183 /* This isn't line-buffering, strictly speaking, it's just
1184 flushing the standard output after the information for
1185 each packet is printed; however, that should be good
1186 enough for all the purposes to which "-l" is put (and
1187 is probably actually better for "-V", as it does fewer
1190 See the comment in "process_packet()" for an explanation of
1191 why we do that, and why we don't just use "setvbuf()" to
1192 make the standard output line-buffered (short version: in
1193 Windows, "line-buffered" is the same as "fully-buffered",
1194 and the output buffer is only flushed when it fills up). */
1195 line_buffered = TRUE;
1197 case 'L': /* Print list of link-layer types and exit */
1199 list_link_layer_types = TRUE;
1201 capture_option_specified = TRUE;
1205 #if GLIB_CHECK_VERSION(2,10,0)
1206 case 'P': /* Perform two pass analysis */
1207 perform_two_pass_analysis = TRUE;
1210 case 'n': /* No name resolution */
1211 gbl_resolv_flags = RESOLV_NONE;
1213 case 'N': /* Select what types of addresses/port #s to resolve */
1214 if (gbl_resolv_flags == RESOLV_ALL)
1215 gbl_resolv_flags = RESOLV_NONE;
1216 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1217 if (badopt != '\0') {
1218 cmdarg_err("-N specifies unknown resolving option '%c';",
1220 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1224 case 'o': /* Override preference from command line */
1225 switch (prefs_set_pref(optarg)) {
1230 case PREFS_SET_SYNTAX_ERR:
1231 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1235 case PREFS_SET_NO_SUCH_PREF:
1236 case PREFS_SET_OBSOLETE:
1237 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1242 case 'q': /* Quiet */
1245 case 'r': /* Read capture file x */
1246 cf_name = g_strdup(optarg);
1248 case 'R': /* Read file filter */
1251 case 'S': /* show packets in real time */
1252 print_packet_info = TRUE;
1254 case 't': /* Time stamp type */
1255 if (strcmp(optarg, "r") == 0)
1256 timestamp_set_type(TS_RELATIVE);
1257 else if (strcmp(optarg, "a") == 0)
1258 timestamp_set_type(TS_ABSOLUTE);
1259 else if (strcmp(optarg, "ad") == 0)
1260 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1261 else if (strcmp(optarg, "d") == 0)
1262 timestamp_set_type(TS_DELTA);
1263 else if (strcmp(optarg, "dd") == 0)
1264 timestamp_set_type(TS_DELTA_DIS);
1265 else if (strcmp(optarg, "e") == 0)
1266 timestamp_set_type(TS_EPOCH);
1268 cmdarg_err("Invalid time stamp type \"%s\"",
1270 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1271 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1275 case 'T': /* printing Type */
1276 if (strcmp(optarg, "text") == 0) {
1277 output_action = WRITE_TEXT;
1278 print_format = PR_FMT_TEXT;
1279 } else if (strcmp(optarg, "ps") == 0) {
1280 output_action = WRITE_TEXT;
1281 print_format = PR_FMT_PS;
1282 } else if (strcmp(optarg, "pdml") == 0) {
1283 output_action = WRITE_XML;
1285 } else if (strcmp(optarg, "psml") == 0) {
1286 output_action = WRITE_XML;
1288 } else if(strcmp(optarg, "fields") == 0) {
1289 output_action = WRITE_FIELDS;
1290 verbose = TRUE; /* Need full tree info */
1292 cmdarg_err("Invalid -T parameter.");
1293 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1297 case 'u': /* Seconds type */
1298 if (strcmp(optarg, "s") == 0)
1299 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1300 else if (strcmp(optarg, "hms") == 0)
1301 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1303 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1304 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1308 case 'v': /* Show version and exit */
1310 GString *comp_info_str;
1311 GString *runtime_info_str;
1312 /* Assemble the compile-time version information string */
1313 comp_info_str = g_string_new("Compiled ");
1314 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1316 /* Assemble the run-time version information string */
1317 runtime_info_str = g_string_new("Running ");
1318 get_runtime_version_info(runtime_info_str, NULL);
1319 show_version(comp_info_str, runtime_info_str);
1320 g_string_free(comp_info_str, TRUE);
1321 g_string_free(runtime_info_str, TRUE);
1325 case 'V': /* Verbose */
1327 /* The user asked for a verbose output, so let's ensure they get it,
1328 * even if they're writing to a file.
1330 print_packet_info = TRUE;
1332 case 'x': /* Print packet data in hex (and ASCII) */
1334 /* The user asked for hex output, so let's ensure they get it,
1335 * even if they're writing to a file.
1337 print_packet_info = TRUE;
1342 /* We won't call the init function for the stat this soon
1343 as it would disallow MATE's fields (which are registered
1344 by the preferences set callback) from being used as
1345 part of a tap filter. Instead, we just add the argument
1346 to a list of stat arguments. */
1347 if (!process_stat_cmd_arg(optarg)) {
1348 cmdarg_err("invalid -z argument.");
1349 cmdarg_err_cont(" -z argument must be one of :");
1350 list_stat_cmd_args();
1355 case '?': /* Bad flag - print usage message */
1358 list_capture_types();
1368 /* If we specified output fields, but not the output field type... */
1369 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1370 cmdarg_err("Output fields were specified with \"-e\", "
1371 "but \"-Tfields\" was not specified.");
1373 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1374 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1375 "specified with \"-e\".");
1380 /* If no capture filter or read filter has been specified, and there are
1381 still command-line arguments, treat them as the tokens of a capture
1382 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1383 flag was specified. */
1384 if (optind < argc) {
1385 if (cf_name != NULL) {
1386 if (rfilter != NULL) {
1387 cmdarg_err("Read filters were specified both with \"-R\" "
1388 "and with additional command-line arguments");
1391 rfilter = get_args_as_string(argc, argv, optind);
1394 if (global_capture_opts.has_cfilter) {
1395 cmdarg_err("Capture filters were specified both with \"-f\""
1396 " and with additional command-line arguments");
1399 global_capture_opts.has_cfilter = TRUE;
1400 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1402 capture_option_specified = TRUE;
1408 if (!global_capture_opts.saving_to_file) {
1409 /* We're not saving the capture to a file; if "-q" wasn't specified,
1410 we should print packet information */
1412 print_packet_info = TRUE;
1414 /* We're saving to a file; if we're writing to the standard output.
1415 and we'll also be writing dissected packets to the standard
1416 output, reject the request. At best, we could redirect that
1417 to the standard error; we *can't* write both to the standard
1418 output and have either of them be useful. */
1419 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1420 cmdarg_err("You can't write both raw packet data and dissected packets"
1421 " to the standard output.");
1426 /* We're not saving the capture to a file; if "-q" wasn't specified,
1427 we should print packet information */
1429 print_packet_info = TRUE;
1432 #ifndef HAVE_LIBPCAP
1433 if (capture_option_specified)
1434 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1441 /* We don't support capture filters when reading from a capture file
1442 (the BPF compiler doesn't support all link-layer types that we
1443 support in capture files we read). */
1445 if (cf_name != NULL) {
1446 if (global_capture_opts.has_cfilter) {
1447 cmdarg_err("Only read filters, not capture filters, "
1448 "can be specified when reading a capture file.");
1455 if (output_action != WRITE_TEXT) {
1456 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1462 if (list_link_layer_types) {
1463 /* We're supposed to list the link-layer types for an interface;
1464 did the user also specify a capture file to be read? */
1466 /* Yes - that's bogus. */
1467 cmdarg_err("You can't specify -L and a capture file to be read.");
1470 /* No - did they specify a ring buffer option? */
1471 if (global_capture_opts.multi_files_on) {
1472 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1478 * "-r" was specified, so we're reading a capture file.
1479 * Capture options don't apply here.
1481 if (global_capture_opts.multi_files_on) {
1482 cmdarg_err("Multiple capture files requested, but "
1483 "a capture isn't being done.");
1486 if (global_capture_opts.has_file_duration) {
1487 cmdarg_err("Switching capture files after a time interval was specified, but "
1488 "a capture isn't being done.");
1491 if (global_capture_opts.has_ring_num_files) {
1492 cmdarg_err("A ring buffer of capture files was specified, but "
1493 "a capture isn't being done.");
1496 if (global_capture_opts.has_autostop_files) {
1497 cmdarg_err("A maximum number of capture files was specified, but "
1498 "a capture isn't being done.");
1502 /* Note: TShark now allows the restriction of a _read_ file by packet count
1503 * and byte count as well as a write file. Other autostop options remain valid
1504 * only for a write file.
1506 if (global_capture_opts.has_autostop_duration) {
1507 cmdarg_err("A maximum capture time was specified, but "
1508 "a capture isn't being done.");
1513 * "-r" wasn't specified, so we're doing a live capture.
1515 if (global_capture_opts.saving_to_file) {
1516 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1518 /* When capturing, we only support writing libpcap format. */
1519 if (out_file_type != WTAP_FILE_PCAP) {
1520 cmdarg_err("Live captures can only be saved in libpcap format.");
1523 if (global_capture_opts.multi_files_on) {
1524 /* Multiple-file mode doesn't work under certain conditions:
1525 a) it doesn't work if you're writing to the standard output;
1526 b) it doesn't work if you're writing to a pipe;
1528 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1529 cmdarg_err("Multiple capture files requested, but "
1530 "the capture is being written to the standard output.");
1533 if (global_capture_opts.output_to_pipe) {
1534 cmdarg_err("Multiple capture files requested, but "
1535 "the capture file is a pipe.");
1538 if (!global_capture_opts.has_autostop_filesize &&
1539 !global_capture_opts.has_file_duration) {
1540 cmdarg_err("Multiple capture files requested, but "
1541 "no maximum capture file size or duration was specified.");
1545 /* Currently, we don't support read filters when capturing
1546 and saving the packets. */
1547 if (rfilter != NULL) {
1548 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1552 /* They didn't specify a "-w" flag, so we won't be saving to a
1553 capture file. Check for options that only make sense if
1554 we're saving to a file. */
1555 if (global_capture_opts.has_autostop_filesize) {
1556 cmdarg_err("Maximum capture file size specified, but "
1557 "capture isn't being saved to a file.");
1560 if (global_capture_opts.multi_files_on) {
1561 cmdarg_err("Multiple capture files requested, but "
1562 "the capture isn't being saved to a file.");
1571 /* Start windows sockets */
1572 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1575 /* Notify all registered modules that have had any of their preferences
1576 changed either from one of the preferences file or from the command
1577 line that their preferences have changed. */
1580 /* At this point MATE will have registered its field array so we can
1581 have a tap filter with one of MATE's late-registered fields as part
1582 of the filter. We can now process all the "-z" arguments. */
1583 start_requested_stats();
1586 /* We currently don't support taps, or printing dissected packets,
1587 if we're writing to a pipe. */
1588 if (global_capture_opts.saving_to_file &&
1589 global_capture_opts.output_to_pipe) {
1590 if (have_tap_listeners()) {
1591 cmdarg_err("Taps aren't supported when saving to a pipe.");
1594 if (print_packet_info) {
1595 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1601 /* disabled protocols as per configuration file */
1602 if (gdp_path == NULL && dp_path == NULL) {
1603 set_disabled_protos_list();
1606 /* Build the column format array */
1607 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1610 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1611 capture_opts_trim_ring_num_files(&global_capture_opts);
1614 if (rfilter != NULL) {
1615 if (!dfilter_compile(rfilter, &rfcode)) {
1616 cmdarg_err("%s", dfilter_error_msg);
1618 #ifdef HAVE_PCAP_OPEN_DEAD
1622 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1624 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1626 " Note: That display filter code looks like a valid capture filter;");
1628 " maybe you mixed them up?");
1637 cfile.rfcode = rfcode;
1639 if (print_packet_info) {
1640 /* If we're printing as text or PostScript, we have
1641 to create a print stream. */
1642 if (output_action == WRITE_TEXT) {
1643 switch (print_format) {
1646 print_stream = print_stream_text_stdio_new(stdout);
1650 print_stream = print_stream_ps_stdio_new(stdout);
1654 g_assert_not_reached();
1659 /* We have to dissect each packet if:
1661 we're printing information about each packet;
1663 we're using a read filter on the packets;
1665 we're using any taps. */
1666 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1670 * We're reading a capture file.
1674 * Immediately relinquish any special privileges we have; we must not
1675 * be allowed to read any capture files the user running TShark
1678 relinquish_special_privs_perm();
1679 print_current_user();
1681 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1686 /* Set timestamp precision; there should arguably be a command-line
1687 option to let the user set this. */
1688 switch(wtap_file_tsprecision(cfile.wth)) {
1689 case(WTAP_FILE_TSPREC_SEC):
1690 timestamp_set_precision(TS_PREC_AUTO_SEC);
1692 case(WTAP_FILE_TSPREC_DSEC):
1693 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1695 case(WTAP_FILE_TSPREC_CSEC):
1696 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1698 case(WTAP_FILE_TSPREC_MSEC):
1699 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1701 case(WTAP_FILE_TSPREC_USEC):
1702 timestamp_set_precision(TS_PREC_AUTO_USEC);
1704 case(WTAP_FILE_TSPREC_NSEC):
1705 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1708 g_assert_not_reached();
1711 /* Process the packets in the file */
1713 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1714 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1715 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1717 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1720 /* We still dump out the results of taps, etc., as we might have
1721 read some packets; however, we exit with an error status. */
1725 /* No capture file specified, so we're supposed to do a live capture
1726 (or get a list of link-layer types for a live capture device);
1727 do we have support for live captures? */
1734 cmdarg_err("WinPcap couldn't be found.");
1735 detailed_err = cant_load_winpcap_err("TShark");
1736 cmdarg_err_cont("%s", detailed_err);
1737 g_free(detailed_err);
1742 /* trim the interface name and exit if that failed */
1743 if (!capture_opts_trim_iface(&global_capture_opts,
1744 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1748 /* if requested, list the link layer types and exit */
1749 if (list_link_layer_types) {
1750 /* Get the list of link-layer types for the capture device. */
1751 if_capabilities_t *caps;
1753 caps = capture_get_if_capabilities(global_capture_opts.iface,
1754 global_capture_opts.monitor_mode,
1757 cmdarg_err("%s", err_str);
1761 if (caps->data_link_types == NULL) {
1762 cmdarg_err("The capture device \"%s\" has no data link types.", global_capture_opts.iface);
1765 capture_opts_print_if_capabilities(caps,
1766 global_capture_opts.monitor_mode);
1767 free_if_capabilities(caps);
1771 if (print_packet_info) {
1772 if (!write_preamble(NULL)) {
1773 show_print_file_io_error(errno);
1776 } else if (!quiet) {
1778 * We're not printing information for each packet, and the user
1779 * didn't ask us not to print a count of packets as they arrive,
1780 * so print that count so the user knows that packets are arriving.
1782 * XXX - what if the user wants to do a live capture, doesn't want
1783 * to save it to a file, doesn't want information printed for each
1784 * packet, does want some "-z" statistic, and wants packet counts
1785 * so they know whether they're seeing any packets?
1787 print_packet_counts = TRUE;
1790 /* For now, assume libpcap gives microsecond precision. */
1791 timestamp_set_precision(TS_PREC_AUTO_USEC);
1794 * XXX - this returns FALSE if an error occurred, but it also
1795 * returns FALSE if the capture stops because a time limit
1796 * was reached (and possibly other limits), so we can't assume
1797 * it means an error.
1799 * The capture code is a bit twisty, so it doesn't appear to
1800 * be an easy fix. We just ignore the return value for now.
1801 * Instead, pass on the exit status from the capture child.
1804 exit_status = global_capture_opts.fork_child_status;
1806 if (print_packet_info) {
1807 if (!write_finale()) {
1809 show_print_file_io_error(err);
1813 /* No - complain. */
1814 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1821 #if GLIB_CHECK_VERSION(2,10,0)
1822 if (cfile.plist_start != NULL)
1823 g_slice_free_chain(frame_data, cfile.plist_start, next);
1826 draw_tap_listeners(TRUE);
1827 funnel_dump_all_text_windows();
1830 output_fields_free(output_fields);
1831 output_fields = NULL;
1836 /*#define USE_BROKEN_G_MAIN_LOOP*/
1838 #ifdef USE_BROKEN_G_MAIN_LOOP
1841 gboolean loop_running = FALSE;
1843 guint32 packet_count = 0;
1846 /* XXX - move to the right position / file */
1847 /* read from a pipe (callback) */
1848 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1850 typedef struct pipe_input_tag {
1854 pipe_input_cb_t input_cb;
1855 guint pipe_input_id;
1857 GStaticMutex callback_running;
1861 static pipe_input_t pipe_input;
1864 /* The timer has expired, see if there's stuff to read from the pipe,
1865 if so, do the callback */
1867 pipe_timer_cb(gpointer data)
1871 gboolean result, result1;
1873 pipe_input_t *pipe_input_p = data;
1874 gint iterations = 0;
1877 g_static_mutex_lock (&pipe_input_p->callback_running);
1879 /* try to read data from the pipe only 5 times, to avoid blocking */
1880 while(iterations < 5) {
1881 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1883 /* Oddly enough although Named pipes don't work on win9x,
1884 PeekNamedPipe does !!! */
1885 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1886 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1888 /* Get the child process exit status */
1889 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1892 /* If the Peek returned an error, or there are bytes to be read
1893 or the childwatcher thread has terminated then call the normal
1895 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1897 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1899 /* And call the real handler */
1900 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1901 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1902 /* pipe closed, return false so that the timer is stopped */
1903 g_static_mutex_unlock (&pipe_input_p->callback_running);
1908 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1909 /* No data, stop now */
1916 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1918 g_static_mutex_unlock (&pipe_input_p->callback_running);
1920 /* we didn't stopped the timer, so let it run */
1927 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1930 pipe_input.source = source;
1931 pipe_input.child_process = child_process;
1932 pipe_input.user_data = user_data;
1933 pipe_input.input_cb = input_cb;
1936 g_static_mutex_init(&pipe_input.callback_running);
1937 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1938 do this but that doesn't cover all win32 platforms. GTK can do
1939 this but doesn't seem to work over processes. Attempt to do
1940 something similar here, start a timer and check for data on every
1942 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1943 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1953 #ifdef USE_TSHARK_SELECT
1957 struct sigaction action, oldaction;
1961 * XXX - dropping privileges is still required, until code cleanup is done
1963 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1964 * when it's done, we don't need special privileges to run tshark at all,
1965 * therefore we don't need to drop these privileges
1966 * The only thing we might want to keep is a warning if tshark is run as root,
1967 * as it's no longer necessary and potentially dangerous.
1969 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1970 * We've opened the capture device, so we shouldn't need any special
1971 * privileges any more; relinquish those privileges.
1973 * XXX - if we have saved set-user-ID support, we should give up those
1974 * privileges immediately, and then reclaim them long enough to get
1975 * a list of network interfaces and to open one, and then give them
1976 * up again, so that stuff we do while processing the argument list,
1977 * reading the user's preferences, loading and starting plugins
1978 * (especially *user* plugins), etc. is done with the user's privileges,
1979 * not special privileges.
1981 relinquish_special_privs_perm();
1982 print_current_user();
1984 /* Cleanup all data structures used for dissection. */
1985 cleanup_dissection();
1986 /* Initialize all data structures used for dissection. */
1990 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1991 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1993 /* Catch SIGINT and SIGTERM and, if we get either of them,
1994 clean up and exit. If SIGHUP isn't being ignored, catch
1995 it too and, if we get it, clean up and exit.
1997 We restart any read that was in progress, so that it doesn't
1998 disrupt reading from the sync pipe. The signal handler tells
1999 the capture child to finish; it will report that it finished,
2000 or will exit abnormally, so we'll stop reading from the sync
2001 pipe, pick up the exit status, and quit. */
2002 action.sa_handler = capture_cleanup;
2003 action.sa_flags = SA_RESTART;
2004 sigemptyset(&action.sa_mask);
2005 sigaction(SIGTERM, &action, NULL);
2006 sigaction(SIGINT, &action, NULL);
2007 sigaction(SIGHUP, NULL, &oldaction);
2008 if (oldaction.sa_handler == SIG_DFL)
2009 sigaction(SIGHUP, &action, NULL);
2012 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2013 quiet mode, report the number of packets we've captured.
2015 Again, restart any read that was in progress, so that it doesn't
2016 disrupt reading from the sync pipe. */
2017 action.sa_handler = report_counts_siginfo;
2018 action.sa_flags = SA_RESTART;
2019 sigemptyset(&action.sa_mask);
2020 sigaction(SIGINFO, &action, NULL);
2021 #endif /* SIGINFO */
2024 global_capture_opts.state = CAPTURE_PREPARING;
2026 /* Let the user know what interface was chosen. */
2027 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
2028 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
2030 ret = sync_pipe_start(&global_capture_opts);
2035 /* the actual capture loop
2037 * XXX - glib doesn't seem to provide any event based loop handling.
2039 * XXX - for whatever reason,
2040 * calling g_main_loop_new() ends up in 100% cpu load.
2042 * But that doesn't matter: in UNIX we can use select() to find an input
2043 * source with something to do.
2045 * But that doesn't matter because we're in a CLI (that doesn't need to
2046 * update a GUI or something at the same time) so it's OK if we block
2047 * trying to read from the pipe.
2049 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2050 * wrong (but I leave it there in case I am...).
2053 #ifdef USE_TSHARK_SELECT
2055 FD_SET(pipe_input.source, &readfds);
2058 loop_running = TRUE;
2060 while (loop_running)
2062 #ifdef USE_TSHARK_SELECT
2063 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2069 } else if (ret == 1) {
2071 /* Call the real handler */
2072 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2073 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2076 #ifdef USE_TSHARK_SELECT
2085 /* XXX - move the call to main_window_update() out of capture_sync.c */
2086 /* dummy for capture_sync.c to make linker happy */
2087 void main_window_update(void)
2091 /* capture child detected an error */
2093 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2095 cmdarg_err("%s", error_msg);
2096 cmdarg_err_cont("%s", secondary_error_msg);
2100 /* capture child detected an capture filter related error */
2102 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
2104 dfilter_t *rfcode = NULL;
2107 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
2109 "Invalid capture filter: \"%s\"!\n"
2111 "That string looks like a valid display filter; however, it isn't a valid\n"
2112 "capture filter (%s).\n"
2114 "Note that display filters and capture filters don't have the same syntax,\n"
2115 "so you can't use most display filter expressions as capture filters.\n"
2117 "See the User's Guide for a description of the capture filter syntax.",
2118 capture_opts->cfilter, error_message);
2119 dfilter_free(rfcode);
2122 "Invalid capture filter: \"%s\"!\n"
2124 "That string isn't a valid capture filter (%s).\n"
2125 "See the User's Guide for a description of the capture filter syntax.",
2126 capture_opts->cfilter, error_message);
2131 /* capture child tells us we have a new (or the first) capture file */
2133 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2135 gboolean is_tempfile;
2138 if(capture_opts->state == CAPTURE_PREPARING) {
2139 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2141 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2143 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2145 /* free the old filename */
2146 if (capture_opts->save_file != NULL) {
2148 /* we start a new capture file, close the old one (if we had one before) */
2149 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2150 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2151 wtap_close(((capture_file *) capture_opts->cf)->wth);
2153 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2156 g_free(capture_opts->save_file);
2157 is_tempfile = FALSE;
2159 /* we didn't had a save_file before, must be a tempfile */
2163 /* save the new filename */
2164 capture_opts->save_file = g_strdup(new_file);
2166 /* if we are in real-time mode, open the new file now */
2168 /* Attempt to open the capture file and set up to read from it. */
2169 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2173 /* Don't unlink (delete) the save file - leave it around,
2174 for debugging purposes. */
2175 g_free(capture_opts->save_file);
2176 capture_opts->save_file = NULL;
2181 capture_opts->state = CAPTURE_RUNNING;
2187 /* capture child tells us we have new packets to read */
2189 capture_input_new_packets(capture_options *capture_opts, int to_read)
2195 capture_file *cf = capture_opts->cf;
2196 gboolean filtering_tap_listeners;
2201 * Prevent a SIGINFO handler from writing to the standard error while
2202 * we're doing so or writing to the standard output; instead, have it
2203 * just set a flag telling us to print that information when we're done.
2206 #endif /* SIGINFO */
2208 /* Do we have any tap listeners with filters? */
2209 filtering_tap_listeners = have_filtering_tap_listeners();
2211 /* Get the union of the flags for all tap listeners. */
2212 tap_flags = union_of_tap_listener_flags();
2215 while (to_read-- && cf->wth) {
2216 wtap_cleareof(cf->wth);
2217 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2219 /* read from file failed, tell the capture child to stop */
2220 sync_pipe_stop(capture_opts);
2221 wtap_close(cf->wth);
2224 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2225 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2226 filtering_tap_listeners, tap_flags);
2229 /* packet successfully read and gone through the "Read Filter" */
2235 * Dumpcap's doing all the work; we're not doing any dissection.
2236 * Count all the packets it wrote.
2238 packet_count += to_read;
2241 if (print_packet_counts) {
2242 /* We're printing packet counts. */
2243 if (packet_count != 0) {
2244 fprintf(stderr, "\r%u ", packet_count);
2245 /* stderr could be line buffered */
2252 * Allow SIGINFO handlers to write.
2257 * If a SIGINFO handler asked us to write out capture counts, do so.
2261 #endif /* SIGINFO */
2267 if (!print_packet_counts) {
2268 /* Report the count only if we aren't printing a packet count
2269 as packets arrive. */
2270 fprintf(stderr, "%u packet%s captured\n", packet_count,
2271 plurality(packet_count, "", "s"));
2274 infoprint = FALSE; /* we just reported it */
2275 #endif /* SIGINFO */
2280 report_counts_siginfo(int signum _U_)
2282 int sav_errno = errno;
2283 /* If we've been told to delay printing, just set a flag asking
2284 that we print counts (if we're supposed to), otherwise print
2285 the count of packets captured (if we're supposed to). */
2292 #endif /* SIGINFO */
2295 /* capture child detected any packet drops? */
2297 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2299 if (print_packet_counts) {
2300 /* We're printing packet counts to stderr.
2301 Send a newline so that we move to the line after the packet count. */
2302 fprintf(stderr, "\n");
2306 /* We're printing packet counts to stderr.
2307 Send a newline so that we move to the line after the packet count. */
2308 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2314 * Capture child closed its side of the pipe, report any error and
2315 * do the required cleanup.
2318 capture_input_closed(capture_options *capture_opts, gchar *msg)
2321 fprintf(stderr, "tshark: %s\n", msg);
2325 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2326 wtap_close(((capture_file *) capture_opts->cf)->wth);
2327 if(((capture_file *) capture_opts->cf)->user_saved == FALSE){
2328 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2331 #ifdef USE_BROKEN_G_MAIN_LOOP
2332 /*g_main_loop_quit(loop);*/
2335 loop_running = FALSE;
2344 capture_cleanup(DWORD ctrltype _U_)
2346 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2347 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2348 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2349 like SIGTERM at least when the machine's shutting down.
2351 For now, we handle them all as indications that we should clean up
2352 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2355 We must return TRUE so that no other handler - such as one that would
2356 terminate the process - gets called.
2358 XXX - for some reason, typing ^C to TShark, if you run this in
2359 a Cygwin console window in at least some versions of Cygwin,
2360 causes TShark to terminate immediately; this routine gets
2361 called, but the main loop doesn't get a chance to run and
2362 exit cleanly, at least if this is compiled with Microsoft Visual
2363 C++ (i.e., it's a property of the Cygwin console window or Bash;
2364 it happens if TShark is not built with Cygwin - for all I know,
2365 building it with Cygwin may make the problem go away). */
2367 /* tell the capture child to stop */
2368 sync_pipe_stop(&global_capture_opts);
2370 /* don't stop our own loop already here, otherwise status messages and
2371 * cleanup wouldn't be done properly. The child will indicate the stop of
2372 * everything by calling capture_input_closed() later */
2378 capture_cleanup(int signum _U_)
2380 /* tell the capture child to stop */
2381 sync_pipe_stop(&global_capture_opts);
2383 /* don't stop our own loop already here, otherwise status messages and
2384 * cleanup wouldn't be done properly. The child will indicate the stop of
2385 * everything by calling capture_input_closed() later */
2388 #endif /* HAVE_LIBPCAP */
2390 #if GLIB_CHECK_VERSION(2,10,0)
2392 process_packet_first_pass(capture_file *cf,
2393 gint64 offset, const struct wtap_pkthdr *whdr,
2394 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2396 frame_data *fdata = g_slice_new(frame_data);
2400 /* Count this packet. */
2403 /* If we're not running a display filter and we're not printing any
2404 packet information, we don't need to do a dissection. This means
2405 that all packets can be marked as 'passed'. */
2408 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2410 /* If we're going to print packet information, or we're going to
2411 run a read filter, or we're going to process taps, set up to
2412 do a dissection and do so. */
2413 if (do_dissection) {
2414 if (gbl_resolv_flags)
2415 /* Grab any resolved addresses */
2416 host_name_lookup_process(NULL);
2418 /* The protocol tree will be "visible", i.e., printed, only if we're
2419 printing packet details, which is true if we're printing stuff
2420 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2422 epan_dissect_init(&edt, FALSE, FALSE);
2424 /* If we're running a read filter, prime the epan_dissect_t with that
2427 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2429 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2430 &first_ts, &prev_dis_ts, &prev_cap_ts);
2432 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2434 /* Run the read filter if we have one. */
2436 passed = dfilter_apply_edt(cf->rfcode, &edt);
2440 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2441 cap_file_add_fdata(cf, fdata);
2444 g_slice_free(frame_data, fdata);
2447 epan_dissect_cleanup(&edt);
2453 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2454 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2455 gboolean filtering_tap_listeners, guint tap_flags)
2457 gboolean create_proto_tree;
2462 /* If we're not running a display filter and we're not printing any
2463 packet information, we don't need to do a dissection. This means
2464 that all packets can be marked as 'passed'. */
2467 /* If we're going to print packet information, or we're going to
2468 run a read filter, or we're going to process taps, set up to
2469 do a dissection and do so. */
2470 if (do_dissection) {
2471 if (gbl_resolv_flags)
2472 /* Grab any resolved addresses */
2473 host_name_lookup_process(NULL);
2475 if (cf->rfcode || verbose || filtering_tap_listeners ||
2476 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2477 create_proto_tree = TRUE;
2479 create_proto_tree = FALSE;
2481 /* The protocol tree will be "visible", i.e., printed, only if we're
2482 printing packet details, which is true if we're printing stuff
2483 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2485 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2487 /* If we're running a read filter, prime the epan_dissect_t with that
2490 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2492 col_custom_prime_edt(&edt, &cf->cinfo);
2494 tap_queue_init(&edt);
2496 /* We only need the columns if either
2498 1) some tap needs the columns
2502 2) we're printing packet info but we're *not* verbose; in verbose
2503 mode, we print the protocol tree, not the protocol summary. */
2504 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2509 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2511 tap_push_tapped_queue(&edt);
2513 /* Run the read filter if we have one. */
2515 passed = dfilter_apply_edt(cf->rfcode, &edt);
2519 /* Process this packet. */
2520 if (print_packet_info) {
2521 /* We're printing packet information; print the information for
2524 print_packet(cf, &edt);
2526 print_packet(cf, NULL);
2528 /* The ANSI C standard does not appear to *require* that a line-buffered
2529 stream be flushed to the host environment whenever a newline is
2530 written, it just says that, on such a stream, characters "are
2531 intended to be transmitted to or from the host environment as a
2532 block when a new-line character is encountered".
2534 The Visual C++ 6.0 C implementation doesn't do what is intended;
2535 even if you set a stream to be line-buffered, it still doesn't
2536 flush the buffer at the end of every line.
2538 So, if the "-l" flag was specified, we flush the standard output
2539 at the end of a packet. This will do the right thing if we're
2540 printing packet summary lines, and, as we print the entire protocol
2541 tree for a single packet without waiting for anything to happen,
2542 it should be as good as line-buffered mode if we're printing
2543 protocol trees. (The whole reason for the "-l" flag in either
2544 tcpdump or TShark is to allow the output of a live capture to
2545 be piped to a program or script and to have that script see the
2546 information for the packet as soon as it's printed, rather than
2547 having to wait until a standard I/O buffer fills up. */
2551 if (ferror(stdout)) {
2552 show_print_file_io_error(errno);
2558 if (do_dissection) {
2559 epan_dissect_cleanup(&edt);
2566 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2567 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2570 int snapshot_length;
2573 gchar *err_info = NULL;
2575 char *save_file_string = NULL;
2576 gboolean filtering_tap_listeners;
2579 linktype = wtap_file_encap(cf->wth);
2580 if (save_file != NULL) {
2581 /* Get a string that describes what we're writing to */
2582 save_file_string = output_file_description(save_file);
2584 /* Set up to write to the capture file. */
2585 snapshot_length = wtap_snapshot_length(cf->wth);
2586 if (snapshot_length == 0) {
2587 /* Snapshot length of input file not known. */
2588 snapshot_length = WTAP_MAX_PACKET_SIZE;
2590 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2591 FALSE /* compressed */, &err);
2594 /* We couldn't set up to write to the capture file. */
2597 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2598 cmdarg_err("Capture files can't be written in that format.");
2601 case WTAP_ERR_UNSUPPORTED_ENCAP:
2602 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2603 cmdarg_err("The capture file being read can't be written in "
2607 case WTAP_ERR_CANT_OPEN:
2608 cmdarg_err("The %s couldn't be created for some "
2609 "unknown reason.", save_file_string);
2612 case WTAP_ERR_SHORT_WRITE:
2613 cmdarg_err("A full header couldn't be written to the %s.",
2618 cmdarg_err("The %s could not be created: %s.", save_file_string,
2619 wtap_strerror(err));
2625 if (print_packet_info) {
2626 if (!write_preamble(cf)) {
2628 show_print_file_io_error(err);
2635 if (pdh && out_file_name_res) {
2636 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2637 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2638 wtap_file_type_short_string(out_file_type));
2642 /* Do we have any tap listeners with filters? */
2643 filtering_tap_listeners = have_filtering_tap_listeners();
2645 /* Get the union of the flags for all tap listeners. */
2646 tap_flags = union_of_tap_listener_flags();
2648 if (perform_two_pass_analysis) {
2649 #if GLIB_CHECK_VERSION(2,10,0)
2651 int old_max_packet_count = max_packet_count;
2653 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2654 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2655 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2656 /* Stop reading if we have the maximum number of packets;
2657 * When the -c option has not been used, max_packet_count
2658 * starts at 0, which practically means, never stop reading.
2659 * (unless we roll over max_packet_count ?)
2661 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2662 err = 0; /* This is not an error */
2668 /* Close the sequential I/O side, to free up memory it requires. */
2669 wtap_sequential_close(cf->wth);
2671 /* Allow the protocol dissectors to free up memory that they
2672 * don't need after the sequential run-through of the packets. */
2673 postseq_cleanup_all_protocols();
2675 max_packet_count = old_max_packet_count;
2677 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2678 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2679 cf->pd, fdata->cap_len, &err, &err_info)) {
2680 if (process_packet_second_pass(cf, fdata,
2681 &cf->pseudo_header, cf->pd,
2682 filtering_tap_listeners, tap_flags)) {
2683 /* Either there's no read filtering or this packet passed the
2684 filter, so, if we're writing to a capture file, write
2687 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2688 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2690 /* Error writing to a capture file */
2691 show_capture_file_io_error(save_file, err, FALSE);
2692 wtap_dump_close(pdh, &err);
2696 /* Stop reading if we have the maximum number of packets;
2697 * When the -c option has not been used, max_packet_count
2698 * starts at 0, which practically means, never stop reading.
2699 * (unless we roll over max_packet_count ?)
2701 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2702 err = 0; /* This is not an error */
2711 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2712 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2713 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2714 filtering_tap_listeners, tap_flags)) {
2715 /* Either there's no read filtering or this packet passed the
2716 filter, so, if we're writing to a capture file, write
2719 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2720 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2722 /* Error writing to a capture file */
2723 show_capture_file_io_error(save_file, err, FALSE);
2724 wtap_dump_close(pdh, &err);
2728 /* Stop reading if we have the maximum number of packets;
2729 * When the -c option has not been used, max_packet_count
2730 * starts at 0, which practically means, never stop reading.
2731 * (unless we roll over max_packet_count ?)
2733 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2734 err = 0; /* This is not an error */
2743 * Print a message noting that the read failed somewhere along the line.
2745 * If we're printing packet data, and the standard output and error are
2746 * going to the same place, flush the standard output, so everything
2747 * buffered up is written, and then print a newline to the standard error
2748 * before printing the error message, to separate it from the packet
2749 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2750 * the _fstat() documentation at Microsoft doesn't indicate whether
2751 * st_ino is even supported.)
2754 if (print_packet_info) {
2755 struct stat stat_stdout, stat_stderr;
2757 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2758 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2759 stat_stdout.st_ino == stat_stderr.st_ino) {
2761 fprintf(stderr, "\n");
2768 case WTAP_ERR_UNSUPPORTED_ENCAP:
2769 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2770 cf->filename, err_info);
2774 case WTAP_ERR_CANT_READ:
2775 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2779 case WTAP_ERR_SHORT_READ:
2780 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2784 case WTAP_ERR_BAD_RECORD:
2785 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2786 cf->filename, err_info);
2791 cmdarg_err("An error occurred while reading \"%s\": %s.",
2792 cf->filename, wtap_strerror(err));
2795 if (save_file != NULL) {
2796 /* Now close the capture file. */
2797 if (!wtap_dump_close(pdh, &err))
2798 show_capture_file_io_error(save_file, err, TRUE);
2801 if (save_file != NULL) {
2802 /* Now close the capture file. */
2803 if (!wtap_dump_close(pdh, &err))
2804 show_capture_file_io_error(save_file, err, TRUE);
2806 if (print_packet_info) {
2807 if (!write_finale()) {
2809 show_print_file_io_error(err);
2816 wtap_close(cf->wth);
2819 g_free(save_file_string);
2825 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2826 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2827 gboolean filtering_tap_listeners, guint tap_flags)
2830 gboolean create_proto_tree;
2835 /* Count this packet. */
2838 /* If we're not running a display filter and we're not printing any
2839 packet information, we don't need to do a dissection. This means
2840 that all packets can be marked as 'passed'. */
2843 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2845 /* If we're going to print packet information, or we're going to
2846 run a read filter, or we're going to process taps, set up to
2847 do a dissection and do so. */
2848 if (do_dissection) {
2849 if (print_packet_info && gbl_resolv_flags)
2850 /* Grab any resolved addresses */
2851 host_name_lookup_process(NULL);
2853 if (cf->rfcode || verbose || filtering_tap_listeners ||
2854 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2855 create_proto_tree = TRUE;
2857 create_proto_tree = FALSE;
2859 /* The protocol tree will be "visible", i.e., printed, only if we're
2860 printing packet details, which is true if we're printing stuff
2861 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2863 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2865 /* If we're running a read filter, prime the epan_dissect_t with that
2868 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2870 col_custom_prime_edt(&edt, &cf->cinfo);
2872 tap_queue_init(&edt);
2874 /* We only need the columns if either
2876 1) some tap needs the columns
2880 2) we're printing packet info but we're *not* verbose; in verbose
2881 mode, we print the protocol tree, not the protocol summary. */
2882 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2887 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2888 &first_ts, &prev_dis_ts, &prev_cap_ts);
2890 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2892 tap_push_tapped_queue(&edt);
2894 /* Run the read filter if we have one. */
2896 passed = dfilter_apply_edt(cf->rfcode, &edt);
2900 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2902 /* Process this packet. */
2903 if (print_packet_info) {
2904 /* We're printing packet information; print the information for
2907 print_packet(cf, &edt);
2909 print_packet(cf, NULL);
2911 /* The ANSI C standard does not appear to *require* that a line-buffered
2912 stream be flushed to the host environment whenever a newline is
2913 written, it just says that, on such a stream, characters "are
2914 intended to be transmitted to or from the host environment as a
2915 block when a new-line character is encountered".
2917 The Visual C++ 6.0 C implementation doesn't do what is intended;
2918 even if you set a stream to be line-buffered, it still doesn't
2919 flush the buffer at the end of every line.
2921 So, if the "-l" flag was specified, we flush the standard output
2922 at the end of a packet. This will do the right thing if we're
2923 printing packet summary lines, and, as we print the entire protocol
2924 tree for a single packet without waiting for anything to happen,
2925 it should be as good as line-buffered mode if we're printing
2926 protocol trees. (The whole reason for the "-l" flag in either
2927 tcpdump or TShark is to allow the output of a live capture to
2928 be piped to a program or script and to have that script see the
2929 information for the packet as soon as it's printed, rather than
2930 having to wait until a standard I/O buffer fills up. */
2934 if (ferror(stdout)) {
2935 show_print_file_io_error(errno);
2941 if (do_dissection) {
2942 epan_dissect_cleanup(&edt);
2943 frame_data_cleanup(&fdata);
2949 write_preamble(capture_file *cf)
2951 switch (output_action) {
2954 return print_preamble(print_stream, cf ? cf->filename : NULL);
2958 write_pdml_preamble(stdout);
2960 write_psml_preamble(stdout);
2961 return !ferror(stdout);
2964 write_fields_preamble(output_fields, stdout);
2965 return !ferror(stdout);
2968 g_assert_not_reached();
2974 get_line_buf(size_t len)
2976 static char *line_bufp = NULL;
2977 static size_t line_buf_len = 256;
2978 size_t new_line_buf_len;
2980 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2981 new_line_buf_len *= 2)
2983 if (line_bufp == NULL) {
2984 line_buf_len = new_line_buf_len;
2985 line_bufp = g_malloc(line_buf_len + 1);
2987 if (new_line_buf_len > line_buf_len) {
2988 line_buf_len = new_line_buf_len;
2989 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2996 print_columns(capture_file *cf)
3003 line_bufp = get_line_buf(256);
3006 for (i = 0; i < cf->cinfo.num_cols; i++) {
3007 switch (cf->cinfo.col_fmt[i]) {
3011 * Don't print this if we're doing a live capture from a network
3012 * interface - if we're doing a live capture, you won't be
3013 * able to look at the capture in the future (it's not being
3014 * saved anywhere), so the frame numbers are unlikely to be
3017 * (XXX - it might be nice to be able to save and print at
3018 * the same time, sort of like an "Update list of packets
3019 * in real time" capture in Wireshark.)
3021 if (global_capture_opts.iface != NULL)
3024 column_len = strlen(cf->cinfo.col_data[i]);
3027 line_bufp = get_line_buf(buf_offset + column_len);
3028 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
3034 case COL_ABS_DATE_TIME: /* XXX - wider */
3035 column_len = strlen(cf->cinfo.col_data[i]);
3036 if (column_len < 10)
3038 line_bufp = get_line_buf(buf_offset + column_len);
3039 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
3045 case COL_DEF_DL_SRC:
3046 case COL_RES_DL_SRC:
3047 case COL_UNRES_DL_SRC:
3048 case COL_DEF_NET_SRC:
3049 case COL_RES_NET_SRC:
3050 case COL_UNRES_NET_SRC:
3051 column_len = strlen(cf->cinfo.col_data[i]);
3052 if (column_len < 12)
3054 line_bufp = get_line_buf(buf_offset + column_len);
3055 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
3061 case COL_DEF_DL_DST:
3062 case COL_RES_DL_DST:
3063 case COL_UNRES_DL_DST:
3064 case COL_DEF_NET_DST:
3065 case COL_RES_NET_DST:
3066 case COL_UNRES_NET_DST:
3067 column_len = strlen(cf->cinfo.col_data[i]);
3068 if (column_len < 12)
3070 line_bufp = get_line_buf(buf_offset + column_len);
3071 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
3075 column_len = strlen(cf->cinfo.col_data[i]);
3076 line_bufp = get_line_buf(buf_offset + column_len);
3077 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
3080 buf_offset += column_len;
3081 if (i != cf->cinfo.num_cols - 1) {
3083 * This isn't the last column, so we need to print a
3084 * separator between this column and the next.
3086 * If we printed a network source and are printing a
3087 * network destination of the same type next, separate
3088 * them with "->"; if we printed a network destination
3089 * and are printing a network source of the same type
3090 * next, separate them with "<-"; otherwise separate them
3093 * We add enough space to the buffer for " <- " or " -> ",
3094 * even if we're only adding " ".
3096 line_bufp = get_line_buf(buf_offset + 4);
3097 switch (cf->cinfo.col_fmt[i]) {
3102 switch (cf->cinfo.col_fmt[i + 1]) {
3107 strcat(line_bufp + buf_offset, " -> ");
3112 strcat(line_bufp + buf_offset, " ");
3118 case COL_DEF_DL_SRC:
3119 case COL_RES_DL_SRC:
3120 case COL_UNRES_DL_SRC:
3121 switch (cf->cinfo.col_fmt[i + 1]) {
3123 case COL_DEF_DL_DST:
3124 case COL_RES_DL_DST:
3125 case COL_UNRES_DL_DST:
3126 strcat(line_bufp + buf_offset, " -> ");
3131 strcat(line_bufp + buf_offset, " ");
3137 case COL_DEF_NET_SRC:
3138 case COL_RES_NET_SRC:
3139 case COL_UNRES_NET_SRC:
3140 switch (cf->cinfo.col_fmt[i + 1]) {
3142 case COL_DEF_NET_DST:
3143 case COL_RES_NET_DST:
3144 case COL_UNRES_NET_DST:
3145 strcat(line_bufp + buf_offset, " -> ");
3150 strcat(line_bufp + buf_offset, " ");
3159 switch (cf->cinfo.col_fmt[i + 1]) {
3164 strcat(line_bufp + buf_offset, " <- ");
3169 strcat(line_bufp + buf_offset, " ");
3175 case COL_DEF_DL_DST:
3176 case COL_RES_DL_DST:
3177 case COL_UNRES_DL_DST:
3178 switch (cf->cinfo.col_fmt[i + 1]) {
3180 case COL_DEF_DL_SRC:
3181 case COL_RES_DL_SRC:
3182 case COL_UNRES_DL_SRC:
3183 strcat(line_bufp + buf_offset, " <- ");
3188 strcat(line_bufp + buf_offset, " ");
3194 case COL_DEF_NET_DST:
3195 case COL_RES_NET_DST:
3196 case COL_UNRES_NET_DST:
3197 switch (cf->cinfo.col_fmt[i + 1]) {
3199 case COL_DEF_NET_SRC:
3200 case COL_RES_NET_SRC:
3201 case COL_UNRES_NET_SRC:
3202 strcat(line_bufp + buf_offset, " <- ");
3207 strcat(line_bufp + buf_offset, " ");
3214 strcat(line_bufp + buf_offset, " ");
3220 return print_line(print_stream, 0, line_bufp);
3224 print_packet(capture_file *cf, epan_dissect_t *edt)
3226 print_args_t print_args;
3229 /* Print the information in the protocol tree. */
3230 switch (output_action) {
3233 print_args.to_file = TRUE;
3234 print_args.format = print_format;
3235 print_args.print_summary = !verbose;
3236 print_args.print_hex = verbose && print_hex;
3237 print_args.print_formfeed = FALSE;
3238 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3240 /* init the packet range */
3241 packet_range_init(&print_args.range);
3243 if (!proto_tree_print(&print_args, edt, print_stream))
3246 /* "print_hex_data()" will put out a leading blank line, as well
3247 as a trailing one; print one here, to separate the packets,
3248 only if "print_hex_data()" won't be called. */
3249 if (!print_line(print_stream, 0, ""))
3255 proto_tree_write_pdml(edt, stdout);
3257 return !ferror(stdout);
3259 proto_tree_write_fields(output_fields, edt, stdout);
3261 return !ferror(stdout);
3264 /* Just fill in the columns. */
3265 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3267 /* Now print them. */
3268 switch (output_action) {
3271 if (!print_columns(cf))
3276 proto_tree_write_psml(edt, stdout);
3277 return !ferror(stdout);
3278 case WRITE_FIELDS: /*No non-verbose "fields" format */
3279 g_assert_not_reached();
3284 if (!print_hex_data(print_stream, edt))
3286 if (!print_line(print_stream, 0, ""))
3295 switch (output_action) {
3298 return print_finale(print_stream);
3302 write_pdml_finale(stdout);
3304 write_psml_finale(stdout);
3305 return !ferror(stdout);
3308 write_fields_finale(output_fields, stdout);
3309 return !ferror(stdout);
3312 g_assert_not_reached();
3318 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3322 char err_msg[2048+1];
3324 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3328 /* The open succeeded. Fill in the information for this file. */
3330 /* Cleanup all data structures used for dissection. */
3331 cleanup_dissection();
3332 /* Initialize all data structures used for dissection. */
3336 cf->f_datalen = 0; /* not used, but set it anyway */
3338 /* Set the file name because we need it to set the follow stream filter.
3339 XXX - is that still true? We need it for other reasons, though,
3341 cf->filename = g_strdup(fname);
3343 /* Indicate whether it's a permanent or temporary file. */
3344 cf->is_tempfile = is_tempfile;
3346 /* If it's a temporary capture buffer file, mark it as not saved. */
3347 cf->user_saved = !is_tempfile;
3349 cf->cd_t = wtap_file_type(cf->wth);
3351 cf->drops_known = FALSE;
3353 cf->snap = wtap_snapshot_length(cf->wth);
3354 if (cf->snap == 0) {
3355 /* Snapshot length not known. */
3356 cf->has_snap = FALSE;
3357 cf->snap = WTAP_MAX_PACKET_SIZE;
3359 cf->has_snap = TRUE;
3360 nstime_set_zero(&cf->elapsed_time);
3361 nstime_set_unset(&first_ts);
3362 nstime_set_unset(&prev_dis_ts);
3363 nstime_set_unset(&prev_cap_ts);
3365 cf->state = FILE_READ_IN_PROGRESS;
3367 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3368 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3373 g_snprintf(err_msg, sizeof err_msg,
3374 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3375 cmdarg_err("%s", err_msg);
3380 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3382 char *save_file_string;
3384 save_file_string = output_file_description(fname);
3389 cmdarg_err("Not all the packets could be written to the %s because there is "
3390 "no space left on the file system.",
3396 cmdarg_err("Not all the packets could be written to the %s because you are "
3397 "too close to, or over your disk quota.",
3402 case WTAP_ERR_CANT_CLOSE:
3403 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3407 case WTAP_ERR_SHORT_WRITE:
3408 cmdarg_err("Not all the packets could be written to the %s.",
3414 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3415 wtap_strerror(err));
3417 cmdarg_err("An error occurred while writing to the %s: %s.",
3418 save_file_string, wtap_strerror(err));
3422 g_free(save_file_string);
3426 show_print_file_io_error(int err)
3431 cmdarg_err("Not all the packets could be printed because there is "
3432 "no space left on the file system.");
3437 cmdarg_err("Not all the packets could be printed because you are "
3438 "too close to, or over your disk quota.");
3443 cmdarg_err("An error occurred while printing packets: %s.",
3450 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3454 static char errmsg_errno[1024+1];
3457 /* Wiretap error. */
3460 case WTAP_ERR_NOT_REGULAR_FILE:
3461 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3464 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3465 /* Seen only when opening a capture file for reading. */
3466 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3469 case WTAP_ERR_UNSUPPORTED:
3470 /* Seen only when opening a capture file for reading. */
3471 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3472 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3475 errmsg = errmsg_errno;
3478 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3479 /* Seen only when opening a capture file for writing. */
3480 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3481 "The file \"%%s\" is a pipe, and %s capture files can't be "
3482 "written to a pipe.", wtap_file_type_string(file_type));
3483 errmsg = errmsg_errno;
3486 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3487 /* Seen only when opening a capture file for writing. */
3488 errmsg = "TShark doesn't support writing capture files in that format.";
3491 case WTAP_ERR_UNSUPPORTED_ENCAP:
3493 errmsg = "TShark can't save this capture in that format.";
3495 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3496 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3499 errmsg = errmsg_errno;
3503 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3505 errmsg = "TShark can't save this capture in that format.";
3507 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3510 case WTAP_ERR_BAD_RECORD:
3511 /* Seen only when opening a capture file for reading. */
3512 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3513 "The file \"%%s\" appears to be damaged or corrupt.\n"
3516 errmsg = errmsg_errno;
3519 case WTAP_ERR_CANT_OPEN:
3521 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3523 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3526 case WTAP_ERR_SHORT_READ:
3527 errmsg = "The file \"%s\" appears to have been cut short"
3528 " in the middle of a packet or other data.";
3531 case WTAP_ERR_SHORT_WRITE:
3532 errmsg = "A full header couldn't be written to the file \"%s\".";
3536 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3537 "The file \"%%s\" could not be %s: %s.",
3538 for_writing ? "created" : "opened",
3539 wtap_strerror(err));
3540 errmsg = errmsg_errno;
3544 errmsg = file_open_error_message(err, for_writing);
3549 * Open/create errors are reported with an console message in TShark.
3552 open_failure_message(const char *filename, int err, gboolean for_writing)
3554 fprintf(stderr, "tshark: ");
3555 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3556 fprintf(stderr, "\n");
3561 * General errors are reported with an console message in TShark.
3564 failure_message(const char *msg_format, va_list ap)
3566 fprintf(stderr, "tshark: ");
3567 vfprintf(stderr, msg_format, ap);
3568 fprintf(stderr, "\n");
3572 * Read errors are reported with an console message in TShark.
3575 read_failure_message(const char *filename, int err)
3577 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3578 filename, strerror(err));
3582 * Write errors are reported with an console message in TShark.
3585 write_failure_message(const char *filename, int err)
3587 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3588 filename, strerror(err));
3592 * Print to the standard error. This is a command-line tool, so there's
3593 * no need to pop up a console.
3596 vfprintf_stderr(const char *fmt, va_list ap)
3598 vfprintf(stderr, fmt, ap);
3602 fprintf_stderr(const char *fmt, ...)
3607 vfprintf_stderr(fmt, ap);
3612 * Report an error in command-line arguments.
3615 cmdarg_err(const char *fmt, ...)
3620 failure_message(fmt, ap);
3625 * Report additional information for an error in command-line arguments.
3628 cmdarg_err_cont(const char *fmt, ...)
3633 vfprintf(stderr, fmt, ap);
3634 fprintf(stderr, "\n");