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>
55 #include "wsutil/wsgetopt.h"
59 #include <epan/epan.h>
60 #include <epan/filesystem.h>
61 #include <wsutil/privileges.h>
62 #include <wsutil/file_util.h>
65 #include <epan/timestamp.h>
66 #include <epan/packet.h>
68 #include "disabled_protos.h"
69 #include <epan/prefs.h>
70 #include <epan/column.h>
72 #include <epan/addr_resolv.h>
74 #include "clopts_common.h"
75 #include "console_io.h"
76 #include "cmdarg_err.h"
77 #include "version_info.h"
78 #include <epan/plugins.h>
80 #include <epan/epan_dissect.h>
82 #include <epan/stat_cmd_args.h>
83 #include <epan/timestamp.h>
84 #include <epan/ex-opt.h>
87 #include "capture_ui_utils.h"
88 #include "capture_ifinfo.h"
89 #include "capture-pcap-util.h"
91 #include "capture-wpcap.h"
92 #include <wsutil/unicode-utils.h>
94 #include "capture_sync.h"
95 #endif /* HAVE_LIBPCAP */
97 #include <epan/funnel.h>
100 * This is the template for the decode as option; it is shared between the
101 * various functions that output the usage for this parameter.
103 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
105 static guint32 cum_bytes;
106 static nstime_t first_ts;
107 static nstime_t prev_dis_ts;
108 static nstime_t prev_cap_ts;
110 static gboolean print_packet_info; /* TRUE if we're to print packet information */
112 static gboolean perform_two_pass_analysis;
115 * The way the packet decode is to be written.
118 WRITE_TEXT, /* summary or detail text */
119 WRITE_XML, /* PDML or PSML */
120 WRITE_FIELDS /* User defined list of fields */
121 /* Add CSV and the like here */
124 static output_action_e output_action;
125 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
126 static gboolean verbose;
127 static gboolean print_hex;
128 static gboolean line_buffered;
130 static print_format_e print_format = PR_FMT_TEXT;
131 static print_stream_t *print_stream;
133 static output_fields_t* output_fields = NULL;
135 /* The line separator used between packets, changeable via the -S option */
136 static char *separator = "";
140 * TRUE if we're to print packet counts to keep track of captured packets.
142 static gboolean print_packet_counts;
144 static capture_options global_capture_opts;
147 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
148 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
151 static gboolean capture(void);
152 static void report_counts(void);
154 static BOOL WINAPI capture_cleanup(DWORD);
156 static void capture_cleanup(int);
158 static void report_counts_siginfo(int);
161 #endif /* HAVE_LIBPCAP */
163 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
164 static gboolean process_packet(capture_file *cf, gint64 offset,
165 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
166 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
167 static void show_capture_file_io_error(const char *, int, gboolean);
168 static void show_print_file_io_error(int err);
169 static gboolean write_preamble(capture_file *cf);
170 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
171 static gboolean write_finale(void);
172 static const char *cf_open_error_message(int err, gchar *err_info,
173 gboolean for_writing, int file_type);
175 static void open_failure_message(const char *filename, int err,
176 gboolean for_writing);
177 static void failure_message(const char *msg_format, va_list ap);
178 static void read_failure_message(const char *filename, int err);
179 static void write_failure_message(const char *filename, int err);
184 const char *sstr; /* The short string */
185 const char *lstr; /* The long string */
189 string_compare(gconstpointer a, gconstpointer b)
191 return strcmp(((const struct string_elem *)a)->sstr,
192 ((const struct string_elem *)b)->sstr);
196 string_elem_print(gpointer data, gpointer not_used _U_)
198 fprintf(stderr, " %s - %s\n",
199 ((struct string_elem *)data)->sstr,
200 ((struct string_elem *)data)->lstr);
204 list_capture_types(void) {
206 struct string_elem *captypes;
209 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
211 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
212 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
213 if (wtap_dump_can_open(i)) {
214 captypes[i].sstr = wtap_file_type_short_string(i);
215 captypes[i].lstr = wtap_file_type_string(i);
216 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
219 g_slist_foreach(list, string_elem_print, NULL);
225 print_usage(gboolean print_ver)
232 "TShark " VERSION "%s\n"
233 "Dump and analyze network traffic.\n"
234 "See http://www.wireshark.org for more information.\n"
237 wireshark_svnversion, get_copyright_info());
241 fprintf(output, "\n");
242 fprintf(output, "Usage: tshark [options] ...\n");
243 fprintf(output, "\n");
246 fprintf(output, "Capture interface:\n");
247 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
248 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
249 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
250 fprintf(output, " -p don't capture in promiscuous mode\n");
251 #ifdef HAVE_PCAP_CREATE
252 fprintf(output, " -I capture in monitor mode, if available\n");
254 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
255 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
257 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
258 fprintf(output, " -D print list of interfaces and exit\n");
259 fprintf(output, " -L print list of link-layer types of iface and exit\n");
260 fprintf(output, "\n");
261 fprintf(output, "Capture stop conditions:\n");
262 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
263 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
264 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
265 fprintf(output, " files:NUM - stop after NUM files\n");
266 /*fprintf(output, "\n");*/
267 fprintf(output, "Capture output:\n");
268 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
269 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
270 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
271 #endif /* HAVE_LIBPCAP */
273 /*fprintf(output, "\n");*/
274 fprintf(output, "Input file:\n");
275 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
277 fprintf(output, "\n");
278 fprintf(output, "Processing:\n");
279 fprintf(output, " -2 perform a two-pass analysis\n");
280 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
281 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
282 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
283 fprintf(output, " -d %s ...\n", decode_as_arg_template);
284 fprintf(output, " \"Decode As\", see the man page for details\n");
285 fprintf(output, " Example: tcp.port==8888,http\n");
286 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
287 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
289 /*fprintf(output, "\n");*/
290 fprintf(output, "Output:\n");
291 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
292 fprintf(output, " (or to the standard output for \"-\")\n");
293 fprintf(output, " -C <config profile> start with specified configuration profile\n");
294 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
295 fprintf(output, " an empty \"-F\" option will list the file types\n");
296 fprintf(output, " -V add output of packet tree (Packet Details)\n");
297 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
298 fprintf(output, " separated\n");
299 fprintf(output, " -P print packets even when writing to a file\n");
300 fprintf(output, " -S <separator> the line separator to print between packets\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, " -W n Save extra information in the file, if supported.\n");
318 fprintf(output, " n = write network address resolution information\n");
319 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
320 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
322 fprintf(output, "\n");
323 fprintf(output, "Miscellaneous:\n");
324 fprintf(output, " -h display this help and exit\n");
325 fprintf(output, " -v display version info and exit\n");
326 fprintf(output, " -o <name>:<value> ... override preference setting\n");
327 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
328 fprintf(output, " -G [report] dump one of several available reports and exit\n");
329 fprintf(output, " default report=\"fields\"\n");
330 fprintf(output, " use \"-G ?\" for more help\n");
334 glossary_option_help(void)
340 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
342 fprintf(output, "\n");
343 fprintf(output, "Usage: tshark -G [report]\n");
344 fprintf(output, "\n");
345 fprintf(output, "Glossary table reports:\n");
346 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
347 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
348 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
349 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
350 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
351 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
352 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
353 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
354 fprintf(output, "\n");
355 fprintf(output, "Preference reports:\n");
356 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
357 fprintf(output, " -G currentprefs dump current preferences and exit\n");
358 fprintf(output, "\n");
363 * For a dissector table, print on the stream described by output,
364 * its short name (which is what's used in the "-d" option) and its
368 display_dissector_table_names(const char *table_name, const char *ui_name,
371 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
375 * For a dissector handle, print on the stream described by output,
376 * the filter name (which is what's used in the "-d" option) and the full
377 * name for the protocol that corresponds to this handle.
380 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
383 const gchar* proto_filter_name;
384 const gchar* proto_ui_name;
386 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
388 if (proto_id != -1) {
389 proto_filter_name = proto_get_protocol_filter_name(proto_id);
390 proto_ui_name = proto_get_protocol_name(proto_id);
391 g_assert(proto_filter_name != NULL);
392 g_assert(proto_ui_name != NULL);
394 fprintf((FILE *)output, "\t%s (%s)\n",
401 * The protocol_name_search structure is used by find_protocol_name_func()
402 * to pass parameters and store results
404 struct protocol_name_search{
405 gchar *searched_name; /* Protocol filter name we are looking for */
406 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
407 guint nb_match; /* How many dissectors matched searched_name */
409 typedef struct protocol_name_search *protocol_name_search_t;
412 * This function parses all dissectors associated with a table to find the
413 * one whose protocol has the specified filter name. It is called
414 * as a reference function in a call to dissector_table_foreach_handle.
415 * The name we are looking for, as well as the results, are stored in the
416 * protocol_name_search struct pointed to by user_data.
417 * If called using dissector_table_foreach_handle, we actually parse the
418 * whole list of dissectors.
421 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
425 const gchar *protocol_filter_name;
426 protocol_name_search_t search_info;
430 search_info = (protocol_name_search_t)user_data;
432 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
433 if (proto_id != -1) {
434 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
435 g_assert(protocol_filter_name != NULL);
436 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
438 if (search_info->nb_match == 0) {
439 /* Record this handle only if this is the first match */
440 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
442 search_info->nb_match++;
448 * Print all layer type names supported.
449 * We send the output to the stream described by the handle output.
453 fprint_all_layer_types(FILE *output)
456 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
460 * Print all protocol names supported for a specific layer type.
461 * table_name contains the layer type name in which the search is performed.
462 * We send the output to the stream described by the handle output.
466 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
469 dissector_table_foreach_handle(table_name,
470 display_dissector_names,
475 * The function below parses the command-line parameters for the decode as
476 * feature (a string pointer by cl_param).
477 * It checks the format of the command-line, searches for a matching table
478 * and dissector. If a table/dissector match is not found, we display a
479 * summary of the available tables/dissectors (on stderr) and return FALSE.
480 * If everything is fine, we get the "Decode as" preference activated,
481 * then we return TRUE.
484 add_decode_as(const gchar *cl_param)
488 gchar *decoded_param;
489 gchar *remaining_param;
491 gchar *dissector_str;
492 dissector_handle_t dissector_matching;
493 dissector_table_t table_matching;
494 ftenum_t dissector_table_selector_type;
495 struct protocol_name_search user_protocol_name;
497 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
500 decoded_param = g_strdup(cl_param);
501 g_assert(decoded_param);
504 /* The lines below will parse this string (modifying it) to extract all
505 necessary information. Note that decoded_param is still needed since
506 strings are not copied - we just save pointers. */
508 /* This section extracts a layer type (table_name) from decoded_param */
509 table_name = decoded_param; /* Layer type string starts from beginning */
511 remaining_param = strchr(table_name, '=');
512 if (remaining_param == NULL) {
513 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
514 /* If the argument does not follow the template, carry on anyway to check
515 if the table name is at least correct. If remaining_param is NULL,
516 we'll exit anyway further down */
519 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
522 /* Remove leading and trailing spaces from the table name */
523 while ( table_name[0] == ' ' )
525 while ( table_name[strlen(table_name) - 1] == ' ' )
526 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
528 /* The following part searches a table matching with the layer type specified */
529 table_matching = NULL;
531 /* Look for the requested table */
532 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
533 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
536 table_matching = find_dissector_table(table_name);
537 if (!table_matching) {
538 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
542 if (!table_matching) {
543 /* Display a list of supported layer types to help the user, if the
544 specified layer type was not found */
545 cmdarg_err("Valid layer types are:");
546 fprint_all_layer_types(stderr);
548 if (remaining_param == NULL || !table_matching) {
549 /* Exit if the layer type was not found, or if no '=' separator was found
551 g_free(decoded_param);
555 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
556 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
559 remaining_param++; /* Move to the second '=' */
560 *remaining_param = '\0'; /* Remove the second '=' */
562 remaining_param++; /* Position after the layer type string */
564 /* This section extracts a selector value (selector_str) from decoded_param */
566 selector_str = remaining_param; /* Next part starts with the selector number */
568 remaining_param = strchr(selector_str, ',');
569 if (remaining_param == NULL) {
570 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
571 /* If the argument does not follow the template, carry on anyway to check
572 if the selector value is at least correct. If remaining_param is NULL,
573 we'll exit anyway further down */
576 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
579 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
581 switch (dissector_table_selector_type) {
587 /* The selector for this table is an unsigned number. Parse it as such.
588 There's no need to remove leading and trailing spaces from the
589 selector number string, because sscanf will do that for us. */
590 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
591 cmdarg_err("Invalid selector number \"%s\"", selector_str);
592 g_free(decoded_param);
599 /* The selector for this table is a string. */
603 /* There are currently no dissector tables with any types other
604 than the ones listed above. */
605 g_assert_not_reached();
608 if (remaining_param == NULL) {
609 /* Exit if no ',' separator was found (see above) */
610 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
611 fprint_all_protocols_for_layer_types(stderr, table_name);
612 g_free(decoded_param);
616 remaining_param++; /* Position after the selector number string */
618 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
620 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
622 /* Remove leading and trailing spaces from the dissector name */
623 while ( dissector_str[0] == ' ' )
625 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
626 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
628 dissector_matching = NULL;
630 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
631 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 */
632 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
635 user_protocol_name.nb_match = 0;
636 user_protocol_name.searched_name = dissector_str;
637 user_protocol_name.matched_handle = NULL;
639 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 */
641 if (user_protocol_name.nb_match != 0) {
642 dissector_matching = user_protocol_name.matched_handle;
643 if (user_protocol_name.nb_match > 1) {
644 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
648 /* OK, check whether the problem is that there isn't any such
649 protocol, or that there is but it's not specified as a protocol
650 that's valid for that dissector table.
651 Note, we don't exit here, but dissector_matching will remain NULL,
653 if (proto_get_id_by_filter_name(dissector_str) == -1) {
654 /* No such protocol */
655 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
657 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
658 dissector_str, table_name);
663 if (!dissector_matching) {
664 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
665 fprint_all_protocols_for_layer_types(stderr, table_name);
666 g_free(decoded_param);
670 /* This is the end of the code that parses the command-line options.
671 All information is now stored in the variables:
675 The above variables that are strings are still pointing to areas within
676 decoded_parm. decoded_parm thus still needs to be kept allocated in
677 until we stop needing these variables
678 decoded_param will be deallocated at each exit point of this function */
681 /* We now have a pointer to the handle for the requested dissector
682 (requested protocol) inside the variable dissector_matching */
683 switch (dissector_table_selector_type) {
689 /* The selector for this table is an unsigned number. */
690 dissector_change_uint(table_name, selector, dissector_matching);
695 /* The selector for this table is a string. */
696 dissector_change_string(table_name, selector_str, dissector_matching);
700 /* There are currently no dissector tables with any types other
701 than the ones listed above. */
702 g_assert_not_reached();
704 g_free(decoded_param); /* "Decode As" rule has been successfully added */
709 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
710 const gchar *message, gpointer user_data)
712 /* ignore log message, if log_level isn't interesting based
713 upon the console log preferences.
714 If the preferences haven't been loaded loaded yet, display the
717 The default console_log_level preference value is such that only
718 ERROR, CRITICAL and WARNING level messages are processed;
719 MESSAGE, INFO and DEBUG level messages are ignored.
721 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
722 ERROR and CRITICAL level messages so the current code is a behavioral
723 change. The current behavior is the same as in Wireshark.
725 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
726 prefs.console_log_level != 0) {
730 g_log_default_handler(log_domain, log_level, message, user_data);
735 output_file_description(const char *fname)
737 char *save_file_string;
739 /* Get a string that describes what we're writing to */
740 if (strcmp(fname, "-") == 0) {
741 /* We're writing to the standard output */
742 save_file_string = g_strdup("standard output");
744 /* We're writing to a file with the name in save_file */
745 save_file_string = g_strdup_printf("file \"%s\"", fname);
747 return save_file_string;
751 print_current_user(void) {
752 gchar *cur_user, *cur_group;
753 if (started_with_special_privs()) {
754 cur_user = get_cur_username();
755 cur_group = get_cur_groupname();
756 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
757 cur_user, cur_group);
760 if (running_with_special_privs()) {
761 fprintf(stderr, " This could be dangerous.");
763 fprintf(stderr, "\n");
768 check_capture_privs(void) {
771 /* Warn the user if npf.sys isn't loaded. */
772 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
773 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
774 "capturing or\nlisting interfaces.\n");
780 show_version(GString *comp_info_str, GString *runtime_info_str)
782 printf("TShark " VERSION "%s\n"
789 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
790 runtime_info_str->str);
794 main(int argc, char *argv[])
796 char *init_progfile_dir_error;
798 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;
811 volatile int exit_status = 0;
813 gboolean list_link_layer_types = FALSE;
814 gboolean start_capture = FALSE;
819 interface_options interface_opts;
821 gboolean capture_option_specified = FALSE;
823 gboolean quiet = FALSE;
824 #ifdef PCAP_NG_DEFAULT
825 volatile int out_file_type = WTAP_FILE_PCAPNG;
827 volatile int out_file_type = WTAP_FILE_PCAP;
829 volatile gboolean out_file_name_res = FALSE;
830 gchar *volatile cf_name = NULL;
831 gchar *rfilter = NULL;
832 #ifdef HAVE_PCAP_OPEN_DEAD
833 struct bpf_program fcode;
835 dfilter_t *rfcode = NULL;
838 GLogLevelFlags log_flags;
840 gchar *output_only = NULL;
843 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
844 #define OPTSTRING_B "B:"
846 #define OPTSTRING_B ""
847 #endif /* _WIN32 or HAVE_PCAP_CREATE */
848 #else /* HAVE_LIBPCAP */
849 #define OPTSTRING_B ""
850 #endif /* HAVE_LIBPCAP */
852 #ifdef HAVE_PCAP_CREATE
853 #define OPTSTRING_I "I"
855 #define OPTSTRING_I ""
858 #define OPTSTRING "2a:A:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:S:t:T:u:vVw:W:xX:y:z:"
860 static const char optstring[] = OPTSTRING;
863 arg_list_utf_16to8(argc, argv);
864 #if !GLIB_CHECK_VERSION(2,31,0)
870 * Get credential information for later use.
872 init_process_policies();
875 * Attempt to get the pathname of the executable file.
877 init_progfile_dir_error = init_progfile_dir(argv[0], main);
878 if (init_progfile_dir_error != NULL) {
879 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
880 init_progfile_dir_error);
884 * In order to have the -X opts assigned before the wslua machine starts
885 * we need to call getopts before epan_init() gets called.
888 optind_initial = optind;
890 while ((opt = getopt(argc, argv, optstring)) != -1) {
892 case 'C': /* Configuration Profile */
893 if (profile_exists (optarg, FALSE)) {
894 set_profile_name (optarg);
896 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
908 optind = optind_initial;
913 /** Send All g_log messages to our own handler **/
917 G_LOG_LEVEL_CRITICAL|
922 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
924 g_log_set_handler(NULL,
926 tshark_log_handler, NULL /* user_data */);
927 g_log_set_handler(LOG_DOMAIN_MAIN,
929 tshark_log_handler, NULL /* user_data */);
932 g_log_set_handler(LOG_DOMAIN_CAPTURE,
934 tshark_log_handler, NULL /* user_data */);
935 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
937 tshark_log_handler, NULL /* user_data */);
940 initialize_funnel_ops();
943 capture_opts_init(&global_capture_opts, &cfile);
946 timestamp_set_type(TS_RELATIVE);
947 timestamp_set_precision(TS_PREC_AUTO);
948 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
950 /* Register all dissectors; we must do this before checking for the
951 "-G" flag, as the "-G" flag dumps information registered by the
952 dissectors, and we must do it before we read the preferences, in
953 case any dissectors register preferences. */
954 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
955 failure_message, open_failure_message, read_failure_message,
956 write_failure_message);
958 /* Register all tap listeners; we do this before we parse the arguments,
959 as the "-z" argument can specify a registered tap. */
961 /* we register the plugin taps before the other taps because
962 stats_tree taps plugins will be registered as tap listeners
963 by stats_tree_stat.c and need to registered before that */
965 register_all_plugin_tap_listeners();
967 register_all_tap_listeners();
969 /* Now register the preferences for any non-dissector modules.
970 We must do that before we read the preferences as well. */
971 prefs_register_modules();
973 /* If invoked with the "-G" flag, we dump out information based on
974 the argument to the "-G" flag; if no argument is specified,
975 for backwards compatibility we dump out a glossary of display
978 XXX - we do this here, for now, to support "-G" with no arguments.
979 If none of our build or other processes uses "-G" with no arguments,
980 we can just process it with the other arguments. */
981 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
982 proto_initialize_all_prefixes();
985 proto_registrar_dump_fields(1);
987 if (strcmp(argv[2], "fields") == 0)
988 proto_registrar_dump_fields(1);
989 else if (strcmp(argv[2], "fields2") == 0)
990 proto_registrar_dump_fields(2);
991 else if (strcmp(argv[2], "fields3") == 0)
992 proto_registrar_dump_fields(3);
993 else if (strcmp(argv[2], "protocols") == 0)
994 proto_registrar_dump_protocols();
995 else if (strcmp(argv[2], "values") == 0)
996 proto_registrar_dump_values();
997 else if (strcmp(argv[2], "ftypes") == 0)
998 proto_registrar_dump_ftypes();
999 else if (strcmp(argv[2], "decodes") == 0)
1000 dissector_dump_decodes();
1001 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1002 dissector_dump_heur_decodes();
1003 else if (strcmp(argv[2], "defaultprefs") == 0)
1005 else if (strcmp(argv[2], "plugins") == 0)
1007 else if (strcmp(argv[2], "?") == 0)
1008 glossary_option_help();
1009 else if (strcmp(argv[2], "-?") == 0)
1010 glossary_option_help();
1011 else if (strcmp(argv[2], "currentprefs") == 0) {
1012 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1013 &pf_open_errno, &pf_read_errno, &pf_path);
1016 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1023 /* Set the C-language locale to the native environment. */
1024 setlocale(LC_ALL, "");
1026 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1027 &pf_open_errno, &pf_read_errno, &pf_path);
1028 if (gpf_path != NULL) {
1029 if (gpf_open_errno != 0) {
1030 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1031 pf_path, g_strerror(gpf_open_errno));
1033 if (gpf_read_errno != 0) {
1034 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1035 pf_path, g_strerror(gpf_read_errno));
1038 if (pf_path != NULL) {
1039 if (pf_open_errno != 0) {
1040 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1041 g_strerror(pf_open_errno));
1043 if (pf_read_errno != 0) {
1044 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1045 pf_path, g_strerror(pf_read_errno));
1051 /* Set the name resolution code's flags from the preferences. */
1052 gbl_resolv_flags = prefs_p->name_resolve;
1054 /* Read the disabled protocols file. */
1055 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1056 &dp_path, &dp_open_errno, &dp_read_errno);
1057 if (gdp_path != NULL) {
1058 if (gdp_open_errno != 0) {
1059 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1060 gdp_path, g_strerror(gdp_open_errno));
1062 if (gdp_read_errno != 0) {
1063 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1064 gdp_path, g_strerror(gdp_read_errno));
1068 if (dp_path != NULL) {
1069 if (dp_open_errno != 0) {
1071 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1072 g_strerror(dp_open_errno));
1074 if (dp_read_errno != 0) {
1076 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1077 g_strerror(dp_read_errno));
1082 check_capture_privs();
1084 cap_file_init(&cfile);
1086 /* Print format defaults to this. */
1087 print_format = PR_FMT_TEXT;
1089 output_fields = output_fields_new();
1091 /* Now get our args */
1092 while ((opt = getopt(argc, argv, optstring)) != -1) {
1094 case '2': /* Perform two pass analysis */
1095 perform_two_pass_analysis = TRUE;
1097 case 'a': /* autostop criteria */
1098 case 'b': /* Ringbuffer option */
1099 case 'c': /* Capture x packets */
1100 case 'f': /* capture filter */
1101 case 'i': /* Use interface x */
1102 case 'p': /* Don't capture in promiscuous mode */
1103 #ifdef HAVE_PCAP_CREATE
1104 case 'I': /* Capture in monitor mode, if available */
1106 case 's': /* Set the snapshot (capture) length */
1107 case 'w': /* Write to capture file x */
1108 case 'y': /* Set the pcap data link type */
1109 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1110 case 'B': /* Buffer size */
1111 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1113 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1118 capture_option_specified = TRUE;
1123 /* Configuration profile settings were already processed just ignore them this time*/
1125 case 'd': /* Decode as rule */
1126 if (!add_decode_as(optarg))
1129 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1130 case 'K': /* Kerberos keytab file */
1131 read_keytab_file(optarg);
1134 case 'D': /* Print a list of capture devices and exit */
1136 if_list = capture_interface_list(&err, &err_str);
1137 if (if_list == NULL) {
1139 case CANT_GET_INTERFACE_LIST:
1140 case DONT_HAVE_PCAP:
1141 cmdarg_err("%s", err_str);
1145 case NO_INTERFACES_FOUND:
1146 cmdarg_err("There are no interfaces on which a capture can be done");
1151 capture_opts_print_interfaces(if_list);
1152 free_interface_list(if_list);
1155 capture_option_specified = TRUE;
1161 output_fields_add(output_fields, optarg);
1165 if(!output_fields_set_option(output_fields, optarg)) {
1166 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1167 output_fields_list_options(stderr);
1172 out_file_type = wtap_short_string_to_file_type(optarg);
1173 if (out_file_type < 0) {
1174 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1175 list_capture_types();
1179 case 'W': /* Select extra information to save in our capture file */
1180 /* This is patterned after the -N flag which may not be the best idea. */
1181 if (strchr(optarg, 'n'))
1182 out_file_name_res = TRUE;
1184 case 'H': /* Read address to name mappings from a hosts file */
1185 if (! read_hosts_file(optarg))
1187 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1190 out_file_name_res = TRUE;
1193 case 'h': /* Print help and exit */
1197 case 'l': /* "Line-buffer" standard output */
1198 /* This isn't line-buffering, strictly speaking, it's just
1199 flushing the standard output after the information for
1200 each packet is printed; however, that should be good
1201 enough for all the purposes to which "-l" is put (and
1202 is probably actually better for "-V", as it does fewer
1205 See the comment in "process_packet()" for an explanation of
1206 why we do that, and why we don't just use "setvbuf()" to
1207 make the standard output line-buffered (short version: in
1208 Windows, "line-buffered" is the same as "fully-buffered",
1209 and the output buffer is only flushed when it fills up). */
1210 line_buffered = TRUE;
1212 case 'L': /* Print list of link-layer types and exit */
1214 list_link_layer_types = TRUE;
1216 capture_option_specified = TRUE;
1220 case 'n': /* No name resolution */
1221 gbl_resolv_flags = RESOLV_NONE;
1223 case 'N': /* Select what types of addresses/port #s to resolve */
1224 if (gbl_resolv_flags == RESOLV_ALL)
1225 gbl_resolv_flags = RESOLV_NONE;
1226 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1227 if (badopt != '\0') {
1228 cmdarg_err("-N specifies unknown resolving option '%c';",
1230 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1234 case 'o': /* Override preference from command line */
1235 switch (prefs_set_pref(optarg)) {
1240 case PREFS_SET_SYNTAX_ERR:
1241 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1245 case PREFS_SET_NO_SUCH_PREF:
1246 case PREFS_SET_OBSOLETE:
1247 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1252 case 'q': /* Quiet */
1255 case 'r': /* Read capture file x */
1256 cf_name = g_strdup(optarg);
1258 case 'R': /* Read file filter */
1261 case 'P': /* Print packets even when writing to a file */
1262 print_packet_info = TRUE;
1264 case 'S': /* Set the line Separator to be printed between packets */
1265 separator = strdup(optarg);
1267 case 't': /* Time stamp type */
1268 if (strcmp(optarg, "r") == 0)
1269 timestamp_set_type(TS_RELATIVE);
1270 else if (strcmp(optarg, "a") == 0)
1271 timestamp_set_type(TS_ABSOLUTE);
1272 else if (strcmp(optarg, "ad") == 0)
1273 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1274 else if (strcmp(optarg, "d") == 0)
1275 timestamp_set_type(TS_DELTA);
1276 else if (strcmp(optarg, "dd") == 0)
1277 timestamp_set_type(TS_DELTA_DIS);
1278 else if (strcmp(optarg, "e") == 0)
1279 timestamp_set_type(TS_EPOCH);
1280 else if (strcmp(optarg, "u") == 0)
1281 timestamp_set_type(TS_UTC);
1282 else if (strcmp(optarg, "ud") == 0)
1283 timestamp_set_type(TS_UTC_WITH_DATE);
1285 cmdarg_err("Invalid time stamp type \"%s\"",
1287 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1288 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1292 case 'T': /* printing Type */
1293 if (strcmp(optarg, "text") == 0) {
1294 output_action = WRITE_TEXT;
1295 print_format = PR_FMT_TEXT;
1296 } else if (strcmp(optarg, "ps") == 0) {
1297 output_action = WRITE_TEXT;
1298 print_format = PR_FMT_PS;
1299 } else if (strcmp(optarg, "pdml") == 0) {
1300 output_action = WRITE_XML;
1302 } else if (strcmp(optarg, "psml") == 0) {
1303 output_action = WRITE_XML;
1305 } else if(strcmp(optarg, "fields") == 0) {
1306 output_action = WRITE_FIELDS;
1307 verbose = TRUE; /* Need full tree info */
1309 cmdarg_err("Invalid -T parameter.");
1310 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1314 case 'u': /* Seconds type */
1315 if (strcmp(optarg, "s") == 0)
1316 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1317 else if (strcmp(optarg, "hms") == 0)
1318 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1320 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1321 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1325 case 'v': /* Show version and exit */
1327 GString *comp_info_str;
1328 GString *runtime_info_str;
1329 /* Assemble the compile-time version information string */
1330 comp_info_str = g_string_new("Compiled ");
1331 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1333 /* Assemble the run-time version information string */
1334 runtime_info_str = g_string_new("Running ");
1335 get_runtime_version_info(runtime_info_str, NULL);
1336 show_version(comp_info_str, runtime_info_str);
1337 g_string_free(comp_info_str, TRUE);
1338 g_string_free(runtime_info_str, TRUE);
1342 case 'O': /* Only output these protocols */
1343 output_only = g_strdup(optarg);
1345 case 'V': /* Verbose */
1347 /* The user asked for a verbose output, so let's ensure they get it,
1348 * even if they're writing to a file.
1350 print_packet_info = TRUE;
1352 case 'x': /* Print packet data in hex (and ASCII) */
1354 /* The user asked for hex output, so let's ensure they get it,
1355 * even if they're writing to a file.
1357 print_packet_info = TRUE;
1362 /* We won't call the init function for the stat this soon
1363 as it would disallow MATE's fields (which are registered
1364 by the preferences set callback) from being used as
1365 part of a tap filter. Instead, we just add the argument
1366 to a list of stat arguments. */
1367 if (!process_stat_cmd_arg(optarg)) {
1368 cmdarg_err("invalid -z argument.");
1369 cmdarg_err_cont(" -z argument must be one of :");
1370 list_stat_cmd_args();
1375 case '?': /* Bad flag - print usage message */
1378 list_capture_types();
1388 /* If we specified output fields, but not the output field type... */
1389 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1390 cmdarg_err("Output fields were specified with \"-e\", "
1391 "but \"-Tfields\" was not specified.");
1393 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1394 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1395 "specified with \"-e\".");
1400 /* If no capture filter or read filter has been specified, and there are
1401 still command-line arguments, treat them as the tokens of a capture
1402 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1403 flag was specified. */
1404 if (optind < argc) {
1405 if (cf_name != NULL) {
1406 if (rfilter != NULL) {
1407 cmdarg_err("Read filters were specified both with \"-R\" "
1408 "and with additional command-line arguments.");
1411 rfilter = get_args_as_string(argc, argv, optind);
1414 if (global_capture_opts.default_options.cfilter) {
1415 cmdarg_err("A default capture filter was specified both with \"-f\""
1416 " and with additional command-line arguments.");
1419 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1420 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1421 if (interface_opts.cfilter == NULL) {
1422 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1423 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1424 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1426 cmdarg_err("A capture filter was specified both with \"-f\""
1427 " and with additional command-line arguments.");
1431 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1433 capture_option_specified = TRUE;
1439 if (!global_capture_opts.saving_to_file) {
1440 /* We're not saving the capture to a file; if "-q" wasn't specified,
1441 we should print packet information */
1443 print_packet_info = TRUE;
1445 /* We're saving to a file; if we're writing to the standard output.
1446 and we'll also be writing dissected packets to the standard
1447 output, reject the request. At best, we could redirect that
1448 to the standard error; we *can't* write both to the standard
1449 output and have either of them be useful. */
1450 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1451 cmdarg_err("You can't write both raw packet data and dissected packets"
1452 " to the standard output.");
1457 /* We're not saving the capture to a file; if "-q" wasn't specified,
1458 we should print packet information */
1460 print_packet_info = TRUE;
1463 #ifndef HAVE_LIBPCAP
1464 if (capture_option_specified)
1465 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1472 /* We don't support capture filters when reading from a capture file
1473 (the BPF compiler doesn't support all link-layer types that we
1474 support in capture files we read). */
1476 if (cf_name != NULL) {
1477 if (global_capture_opts.default_options.cfilter) {
1478 cmdarg_err("Only read filters, not capture filters, "
1479 "can be specified when reading a capture file.");
1486 if (output_action != WRITE_TEXT) {
1487 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1492 if (output_only != NULL) {
1496 cmdarg_err("-O requires -V");
1500 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1501 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1502 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1507 if (list_link_layer_types) {
1508 /* We're supposed to list the link-layer types for an interface;
1509 did the user also specify a capture file to be read? */
1511 /* Yes - that's bogus. */
1512 cmdarg_err("You can't specify -L and a capture file to be read.");
1515 /* No - did they specify a ring buffer option? */
1516 if (global_capture_opts.multi_files_on) {
1517 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1523 * "-r" was specified, so we're reading a capture file.
1524 * Capture options don't apply here.
1526 if (global_capture_opts.multi_files_on) {
1527 cmdarg_err("Multiple capture files requested, but "
1528 "a capture isn't being done.");
1531 if (global_capture_opts.has_file_duration) {
1532 cmdarg_err("Switching capture files after a time interval was specified, but "
1533 "a capture isn't being done.");
1536 if (global_capture_opts.has_ring_num_files) {
1537 cmdarg_err("A ring buffer of capture files was specified, but "
1538 "a capture isn't being done.");
1541 if (global_capture_opts.has_autostop_files) {
1542 cmdarg_err("A maximum number of capture files was specified, but "
1543 "a capture isn't being done.");
1547 /* Note: TShark now allows the restriction of a _read_ file by packet count
1548 * and byte count as well as a write file. Other autostop options remain valid
1549 * only for a write file.
1551 if (global_capture_opts.has_autostop_duration) {
1552 cmdarg_err("A maximum capture time was specified, but "
1553 "a capture isn't being done.");
1558 * "-r" wasn't specified, so we're doing a live capture.
1560 if (global_capture_opts.saving_to_file) {
1561 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1563 /* When capturing, we only support writing pcap or pcap-ng format. */
1564 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1565 cmdarg_err("Live captures can only be saved in libpcap format.");
1568 if (global_capture_opts.multi_files_on) {
1569 /* Multiple-file mode doesn't work under certain conditions:
1570 a) it doesn't work if you're writing to the standard output;
1571 b) it doesn't work if you're writing to a pipe;
1573 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1574 cmdarg_err("Multiple capture files requested, but "
1575 "the capture is being written to the standard output.");
1578 if (global_capture_opts.output_to_pipe) {
1579 cmdarg_err("Multiple capture files requested, but "
1580 "the capture file is a pipe.");
1583 if (!global_capture_opts.has_autostop_filesize &&
1584 !global_capture_opts.has_file_duration) {
1585 cmdarg_err("Multiple capture files requested, but "
1586 "no maximum capture file size or duration was specified.");
1590 /* Currently, we don't support read filters when capturing
1591 and saving the packets. */
1592 if (rfilter != NULL) {
1593 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1597 /* They didn't specify a "-w" flag, so we won't be saving to a
1598 capture file. Check for options that only make sense if
1599 we're saving to a file. */
1600 if (global_capture_opts.has_autostop_filesize) {
1601 cmdarg_err("Maximum capture file size specified, but "
1602 "capture isn't being saved to a file.");
1605 if (global_capture_opts.multi_files_on) {
1606 cmdarg_err("Multiple capture files requested, but "
1607 "the capture isn't being saved to a file.");
1616 /* Start windows sockets */
1617 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1620 /* Notify all registered modules that have had any of their preferences
1621 changed either from one of the preferences file or from the command
1622 line that their preferences have changed. */
1625 /* At this point MATE will have registered its field array so we can
1626 have a tap filter with one of MATE's late-registered fields as part
1627 of the filter. We can now process all the "-z" arguments. */
1628 start_requested_stats();
1631 /* We currently don't support taps, or printing dissected packets,
1632 if we're writing to a pipe. */
1633 if (global_capture_opts.saving_to_file &&
1634 global_capture_opts.output_to_pipe) {
1635 if (tap_listeners_require_dissection()) {
1636 cmdarg_err("Taps aren't supported when saving to a pipe.");
1639 if (print_packet_info) {
1640 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1646 /* disabled protocols as per configuration file */
1647 if (gdp_path == NULL && dp_path == NULL) {
1648 set_disabled_protos_list();
1651 /* Build the column format array */
1652 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1655 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1656 capture_opts_trim_ring_num_files(&global_capture_opts);
1659 if (rfilter != NULL) {
1660 if (!dfilter_compile(rfilter, &rfcode)) {
1661 cmdarg_err("%s", dfilter_error_msg);
1663 #ifdef HAVE_PCAP_OPEN_DEAD
1667 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1669 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1671 " Note: That display filter code looks like a valid capture filter;");
1673 " maybe you mixed them up?");
1682 cfile.rfcode = rfcode;
1684 if (print_packet_info) {
1685 /* If we're printing as text or PostScript, we have
1686 to create a print stream. */
1687 if (output_action == WRITE_TEXT) {
1688 switch (print_format) {
1691 print_stream = print_stream_text_stdio_new(stdout);
1695 print_stream = print_stream_ps_stdio_new(stdout);
1699 g_assert_not_reached();
1704 /* We have to dissect each packet if:
1706 we're printing information about each packet;
1708 we're using a read filter on the packets;
1710 we're using any taps that need dissection. */
1711 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1715 * We're reading a capture file.
1719 * Immediately relinquish any special privileges we have; we must not
1720 * be allowed to read any capture files the user running TShark
1723 relinquish_special_privs_perm();
1724 print_current_user();
1726 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1731 /* Set timestamp precision; there should arguably be a command-line
1732 option to let the user set this. */
1733 switch(wtap_file_tsprecision(cfile.wth)) {
1734 case(WTAP_FILE_TSPREC_SEC):
1735 timestamp_set_precision(TS_PREC_AUTO_SEC);
1737 case(WTAP_FILE_TSPREC_DSEC):
1738 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1740 case(WTAP_FILE_TSPREC_CSEC):
1741 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1743 case(WTAP_FILE_TSPREC_MSEC):
1744 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1746 case(WTAP_FILE_TSPREC_USEC):
1747 timestamp_set_precision(TS_PREC_AUTO_USEC);
1749 case(WTAP_FILE_TSPREC_NSEC):
1750 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1753 g_assert_not_reached();
1756 /* Process the packets in the file */
1759 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1760 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1761 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1763 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1766 CATCH(OutOfMemoryError) {
1770 "Sorry, but TShark has to terminate now!\n"
1772 "Some infos / workarounds can be found at:\n"
1773 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1778 /* We still dump out the results of taps, etc., as we might have
1779 read some packets; however, we exit with an error status. */
1783 /* No capture file specified, so we're supposed to do a live capture
1784 (or get a list of link-layer types for a live capture device);
1785 do we have support for live captures? */
1787 /* trim the interface name and exit if that failed */
1788 if (!capture_opts_trim_iface(&global_capture_opts,
1789 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1793 /* if requested, list the link layer types and exit */
1794 if (list_link_layer_types) {
1796 interface_options interface_opts;
1798 /* Get the list of link-layer types for the capture devices. */
1799 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1800 if_capabilities_t *caps;
1802 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1803 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1805 cmdarg_err("%s", err_str);
1809 if (caps->data_link_types == NULL) {
1810 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1813 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1814 free_if_capabilities(caps);
1819 if (print_packet_info) {
1820 if (!write_preamble(NULL)) {
1821 show_print_file_io_error(errno);
1824 } else if (!quiet) {
1826 * We're not printing information for each packet, and the user
1827 * didn't ask us not to print a count of packets as they arrive,
1828 * so print that count so the user knows that packets are arriving.
1830 * XXX - what if the user wants to do a live capture, doesn't want
1831 * to save it to a file, doesn't want information printed for each
1832 * packet, does want some "-z" statistic, and wants packet counts
1833 * so they know whether they're seeing any packets?
1835 print_packet_counts = TRUE;
1838 /* For now, assume libpcap gives microsecond precision. */
1839 timestamp_set_precision(TS_PREC_AUTO_USEC);
1842 * XXX - this returns FALSE if an error occurred, but it also
1843 * returns FALSE if the capture stops because a time limit
1844 * was reached (and possibly other limits), so we can't assume
1845 * it means an error.
1847 * The capture code is a bit twisty, so it doesn't appear to
1848 * be an easy fix. We just ignore the return value for now.
1849 * Instead, pass on the exit status from the capture child.
1852 exit_status = global_capture_opts.fork_child_status;
1854 if (print_packet_info) {
1855 if (!write_finale()) {
1857 show_print_file_io_error(err);
1861 /* No - complain. */
1862 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1869 if (cfile.frames != NULL) {
1870 free_frame_data_sequence(cfile.frames);
1871 cfile.frames = NULL;
1874 draw_tap_listeners(TRUE);
1875 funnel_dump_all_text_windows();
1878 output_fields_free(output_fields);
1879 output_fields = NULL;
1884 /*#define USE_BROKEN_G_MAIN_LOOP*/
1886 #ifdef USE_BROKEN_G_MAIN_LOOP
1889 gboolean loop_running = FALSE;
1891 guint32 packet_count = 0;
1894 /* XXX - move to the right position / file */
1895 /* read from a pipe (callback) */
1896 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1898 typedef struct pipe_input_tag {
1902 pipe_input_cb_t input_cb;
1903 guint pipe_input_id;
1905 GMutex *callback_running;
1909 static pipe_input_t pipe_input;
1912 /* The timer has expired, see if there's stuff to read from the pipe,
1913 if so, do the callback */
1915 pipe_timer_cb(gpointer data)
1919 gboolean result, result1;
1921 pipe_input_t *pipe_input_p = data;
1922 gint iterations = 0;
1924 g_mutex_lock (pipe_input_p->callback_running);
1926 /* try to read data from the pipe only 5 times, to avoid blocking */
1927 while(iterations < 5) {
1928 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1930 /* Oddly enough although Named pipes don't work on win9x,
1931 PeekNamedPipe does !!! */
1932 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1933 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1935 /* Get the child process exit status */
1936 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1939 /* If the Peek returned an error, or there are bytes to be read
1940 or the childwatcher thread has terminated then call the normal
1942 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1944 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1946 /* And call the real handler */
1947 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1948 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1949 /* pipe closed, return false so that the timer is stopped */
1950 g_mutex_unlock (pipe_input_p->callback_running);
1955 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1956 /* No data, stop now */
1963 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1965 g_mutex_unlock (pipe_input_p->callback_running);
1967 /* we didn't stopped the timer, so let it run */
1974 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1977 pipe_input.source = source;
1978 pipe_input.child_process = child_process;
1979 pipe_input.user_data = user_data;
1980 pipe_input.input_cb = input_cb;
1983 #if GLIB_CHECK_VERSION(2,31,0)
1984 pipe_input.callback_running = g_malloc(sizeof(GMutex));
1985 g_mutex_init(pipe_input.callback_running);
1987 pipe_input.callback_running = g_mutex_new();
1989 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1990 do this but that doesn't cover all win32 platforms. GTK can do
1991 this but doesn't seem to work over processes. Attempt to do
1992 something similar here, start a timer and check for data on every
1994 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1995 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2006 GString *str = g_string_new("");
2007 #ifdef USE_TSHARK_SELECT
2011 struct sigaction action, oldaction;
2015 * XXX - dropping privileges is still required, until code cleanup is done
2017 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2018 * when it's done, we don't need special privileges to run tshark at all,
2019 * therefore we don't need to drop these privileges
2020 * The only thing we might want to keep is a warning if tshark is run as root,
2021 * as it's no longer necessary and potentially dangerous.
2023 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2024 * We've opened the capture device, so we shouldn't need any special
2025 * privileges any more; relinquish those privileges.
2027 * XXX - if we have saved set-user-ID support, we should give up those
2028 * privileges immediately, and then reclaim them long enough to get
2029 * a list of network interfaces and to open one, and then give them
2030 * up again, so that stuff we do while processing the argument list,
2031 * reading the user's preferences, loading and starting plugins
2032 * (especially *user* plugins), etc. is done with the user's privileges,
2033 * not special privileges.
2035 relinquish_special_privs_perm();
2036 print_current_user();
2038 /* Cleanup all data structures used for dissection. */
2039 cleanup_dissection();
2040 /* Initialize all data structures used for dissection. */
2044 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2045 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2047 /* Catch SIGINT and SIGTERM and, if we get either of them,
2048 clean up and exit. If SIGHUP isn't being ignored, catch
2049 it too and, if we get it, clean up and exit.
2051 We restart any read that was in progress, so that it doesn't
2052 disrupt reading from the sync pipe. The signal handler tells
2053 the capture child to finish; it will report that it finished,
2054 or will exit abnormally, so we'll stop reading from the sync
2055 pipe, pick up the exit status, and quit. */
2056 action.sa_handler = capture_cleanup;
2057 action.sa_flags = SA_RESTART;
2058 sigemptyset(&action.sa_mask);
2059 sigaction(SIGTERM, &action, NULL);
2060 sigaction(SIGINT, &action, NULL);
2061 sigaction(SIGHUP, NULL, &oldaction);
2062 if (oldaction.sa_handler == SIG_DFL)
2063 sigaction(SIGHUP, &action, NULL);
2066 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2067 quiet mode, report the number of packets we've captured.
2069 Again, restart any read that was in progress, so that it doesn't
2070 disrupt reading from the sync pipe. */
2071 action.sa_handler = report_counts_siginfo;
2072 action.sa_flags = SA_RESTART;
2073 sigemptyset(&action.sa_mask);
2074 sigaction(SIGINFO, &action, NULL);
2075 #endif /* SIGINFO */
2078 global_capture_opts.state = CAPTURE_PREPARING;
2080 /* Let the user know which interfaces were chosen. */
2081 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2082 interface_options interface_opts;
2084 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2085 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2086 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2087 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2090 if (global_capture_opts.ifaces->len < 2) {
2092 if (global_capture_opts.ifaces->len < 4) {
2094 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2095 interface_options interface_opts;
2097 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2099 if (global_capture_opts.ifaces->len > 2) {
2100 g_string_append_printf(str, ",");
2102 g_string_append_printf(str, " ");
2103 if (i == global_capture_opts.ifaces->len - 1) {
2104 g_string_append_printf(str, "and ");
2107 g_string_append_printf(str, "%s", interface_opts.descr);
2110 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2112 fprintf(stderr, "Capturing on %s\n", str->str);
2113 g_string_free(str, TRUE);
2115 ret = sync_pipe_start(&global_capture_opts);
2120 /* the actual capture loop
2122 * XXX - glib doesn't seem to provide any event based loop handling.
2124 * XXX - for whatever reason,
2125 * calling g_main_loop_new() ends up in 100% cpu load.
2127 * But that doesn't matter: in UNIX we can use select() to find an input
2128 * source with something to do.
2130 * But that doesn't matter because we're in a CLI (that doesn't need to
2131 * update a GUI or something at the same time) so it's OK if we block
2132 * trying to read from the pipe.
2134 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2135 * wrong (but I leave it there in case I am...).
2138 #ifdef USE_TSHARK_SELECT
2140 FD_SET(pipe_input.source, &readfds);
2143 loop_running = TRUE;
2147 while (loop_running)
2149 #ifdef USE_TSHARK_SELECT
2150 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2156 } else if (ret == 1) {
2158 /* Call the real handler */
2159 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2160 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2163 #ifdef USE_TSHARK_SELECT
2168 CATCH(OutOfMemoryError) {
2172 "Sorry, but TShark has to terminate now!\n"
2174 "Some infos / workarounds can be found at:\n"
2175 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2183 /* XXX - move the call to main_window_update() out of capture_sync.c */
2184 /* dummy for capture_sync.c to make linker happy */
2185 void main_window_update(void)
2189 /* capture child detected an error */
2191 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2193 cmdarg_err("%s", error_msg);
2194 cmdarg_err_cont("%s", secondary_error_msg);
2198 /* capture child detected an capture filter related error */
2200 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2202 dfilter_t *rfcode = NULL;
2203 interface_options interface_opts;
2205 g_assert(i < capture_opts->ifaces->len);
2206 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2208 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2210 "Invalid capture filter \"%s\" for interface %s!\n"
2212 "That string looks like a valid display filter; however, it isn't a valid\n"
2213 "capture filter (%s).\n"
2215 "Note that display filters and capture filters don't have the same syntax,\n"
2216 "so you can't use most display filter expressions as capture filters.\n"
2218 "See the User's Guide for a description of the capture filter syntax.",
2219 interface_opts.cfilter, interface_opts.descr, error_message);
2220 dfilter_free(rfcode);
2223 "Invalid capture filter \"%s\" for interface %s!\n"
2225 "That string isn't a valid capture filter (%s).\n"
2226 "See the User's Guide for a description of the capture filter syntax.",
2227 interface_opts.cfilter, interface_opts.descr, error_message);
2232 /* capture child tells us we have a new (or the first) capture file */
2234 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2236 gboolean is_tempfile;
2239 if(capture_opts->state == CAPTURE_PREPARING) {
2240 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2242 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2244 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2246 /* free the old filename */
2247 if (capture_opts->save_file != NULL) {
2249 /* we start a new capture file, close the old one (if we had one before) */
2250 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2251 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2252 wtap_close(((capture_file *) capture_opts->cf)->wth);
2254 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2257 g_free(capture_opts->save_file);
2258 is_tempfile = FALSE;
2260 /* we didn't had a save_file before, must be a tempfile */
2264 /* save the new filename */
2265 capture_opts->save_file = g_strdup(new_file);
2267 /* if we are in real-time mode, open the new file now */
2269 /* Attempt to open the capture file and set up to read from it. */
2270 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2274 /* Don't unlink (delete) the save file - leave it around,
2275 for debugging purposes. */
2276 g_free(capture_opts->save_file);
2277 capture_opts->save_file = NULL;
2282 capture_opts->state = CAPTURE_RUNNING;
2288 /* capture child tells us we have new packets to read */
2290 capture_input_new_packets(capture_options *capture_opts, int to_read)
2296 capture_file *cf = capture_opts->cf;
2297 gboolean filtering_tap_listeners;
2302 * Prevent a SIGINFO handler from writing to the standard error while
2303 * we're doing so or writing to the standard output; instead, have it
2304 * just set a flag telling us to print that information when we're done.
2307 #endif /* SIGINFO */
2309 /* Do we have any tap listeners with filters? */
2310 filtering_tap_listeners = have_filtering_tap_listeners();
2312 /* Get the union of the flags for all tap listeners. */
2313 tap_flags = union_of_tap_listener_flags();
2316 while (to_read-- && cf->wth) {
2317 wtap_cleareof(cf->wth);
2318 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2320 /* read from file failed, tell the capture child to stop */
2321 sync_pipe_stop(capture_opts);
2322 wtap_close(cf->wth);
2325 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2326 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2327 filtering_tap_listeners, tap_flags);
2330 /* packet successfully read and gone through the "Read Filter" */
2336 * Dumpcap's doing all the work; we're not doing any dissection.
2337 * Count all the packets it wrote.
2339 packet_count += to_read;
2342 if (print_packet_counts) {
2343 /* We're printing packet counts. */
2344 if (packet_count != 0) {
2345 fprintf(stderr, "\r%u ", packet_count);
2346 /* stderr could be line buffered */
2353 * Allow SIGINFO handlers to write.
2358 * If a SIGINFO handler asked us to write out capture counts, do so.
2362 #endif /* SIGINFO */
2368 if (!print_packet_counts) {
2369 /* Report the count only if we aren't printing a packet count
2370 as packets arrive. */
2371 fprintf(stderr, "%u packet%s captured\n", packet_count,
2372 plurality(packet_count, "", "s"));
2375 infoprint = FALSE; /* we just reported it */
2376 #endif /* SIGINFO */
2381 report_counts_siginfo(int signum _U_)
2383 int sav_errno = errno;
2384 /* If we've been told to delay printing, just set a flag asking
2385 that we print counts (if we're supposed to), otherwise print
2386 the count of packets captured (if we're supposed to). */
2393 #endif /* SIGINFO */
2396 /* capture child detected any packet drops? */
2398 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2400 if (print_packet_counts) {
2401 /* We're printing packet counts to stderr.
2402 Send a newline so that we move to the line after the packet count. */
2403 fprintf(stderr, "\n");
2407 /* We're printing packet counts to stderr.
2408 Send a newline so that we move to the line after the packet count. */
2409 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2415 * Capture child closed its side of the pipe, report any error and
2416 * do the required cleanup.
2419 capture_input_closed(capture_options *capture_opts, gchar *msg)
2422 fprintf(stderr, "tshark: %s\n", msg);
2426 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2427 wtap_close(((capture_file *) capture_opts->cf)->wth);
2428 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2429 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2432 #ifdef USE_BROKEN_G_MAIN_LOOP
2433 /*g_main_loop_quit(loop);*/
2436 loop_running = FALSE;
2445 capture_cleanup(DWORD ctrltype _U_)
2447 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2448 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2449 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2450 like SIGTERM at least when the machine's shutting down.
2452 For now, we handle them all as indications that we should clean up
2453 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2456 We must return TRUE so that no other handler - such as one that would
2457 terminate the process - gets called.
2459 XXX - for some reason, typing ^C to TShark, if you run this in
2460 a Cygwin console window in at least some versions of Cygwin,
2461 causes TShark to terminate immediately; this routine gets
2462 called, but the main loop doesn't get a chance to run and
2463 exit cleanly, at least if this is compiled with Microsoft Visual
2464 C++ (i.e., it's a property of the Cygwin console window or Bash;
2465 it happens if TShark is not built with Cygwin - for all I know,
2466 building it with Cygwin may make the problem go away). */
2468 /* tell the capture child to stop */
2469 sync_pipe_stop(&global_capture_opts);
2471 /* don't stop our own loop already here, otherwise status messages and
2472 * cleanup wouldn't be done properly. The child will indicate the stop of
2473 * everything by calling capture_input_closed() later */
2479 capture_cleanup(int signum _U_)
2481 /* tell the capture child to stop */
2482 sync_pipe_stop(&global_capture_opts);
2484 /* don't stop our own loop already here, otherwise status messages and
2485 * cleanup wouldn't be done properly. The child will indicate the stop of
2486 * everything by calling capture_input_closed() later */
2489 #endif /* HAVE_LIBPCAP */
2492 process_packet_first_pass(capture_file *cf,
2493 gint64 offset, const struct wtap_pkthdr *whdr,
2494 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2501 /* The frame number of this packet is one more than the count of
2502 frames in this packet. */
2503 framenum = cf->count + 1;
2505 /* If we're not running a display filter and we're not printing any
2506 packet information, we don't need to do a dissection. This means
2507 that all packets can be marked as 'passed'. */
2510 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2512 /* If we're going to print packet information, or we're going to
2513 run a read filter, or we're going to process taps, set up to
2514 do a dissection and do so. */
2515 if (do_dissection) {
2516 if (gbl_resolv_flags)
2517 /* Grab any resolved addresses */
2518 host_name_lookup_process(NULL);
2520 /* The protocol tree will be "visible", i.e., printed, only if we're
2521 printing packet details, which is true if we're printing stuff
2522 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2524 epan_dissect_init(&edt, FALSE, FALSE);
2526 /* If we're running a read filter, prime the epan_dissect_t with that
2529 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2531 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2532 &first_ts, &prev_dis_ts, &prev_cap_ts);
2534 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2536 /* Run the read filter if we have one. */
2538 passed = dfilter_apply_edt(cf->rfcode, &edt);
2542 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2543 frame_data_sequence_add(cf->frames, &fdlocal);
2548 epan_dissect_cleanup(&edt);
2554 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2555 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2556 gboolean filtering_tap_listeners, guint tap_flags)
2558 gboolean create_proto_tree;
2563 /* If we're not running a display filter and we're not printing any
2564 packet information, we don't need to do a dissection. This means
2565 that all packets can be marked as 'passed'. */
2568 /* If we're going to print packet information, or we're going to
2569 run a read filter, or we're going to process taps, set up to
2570 do a dissection and do so. */
2571 if (do_dissection) {
2572 if (gbl_resolv_flags)
2573 /* Grab any resolved addresses */
2574 host_name_lookup_process(NULL);
2576 if (cf->rfcode || verbose || filtering_tap_listeners ||
2577 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2578 create_proto_tree = TRUE;
2580 create_proto_tree = FALSE;
2582 /* The protocol tree will be "visible", i.e., printed, only if we're
2583 printing packet details, which is true if we're printing stuff
2584 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2586 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2588 /* If we're running a read filter, prime the epan_dissect_t with that
2591 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2593 col_custom_prime_edt(&edt, &cf->cinfo);
2595 tap_queue_init(&edt);
2597 /* We only need the columns if either
2599 1) some tap needs the columns
2603 2) we're printing packet info but we're *not* verbose; in verbose
2604 mode, we print the protocol tree, not the protocol summary. */
2605 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2610 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2612 tap_push_tapped_queue(&edt);
2614 /* Run the read filter if we have one. */
2616 passed = dfilter_apply_edt(cf->rfcode, &edt);
2620 /* Process this packet. */
2621 if (print_packet_info) {
2622 /* We're printing packet information; print the information for
2625 print_packet(cf, &edt);
2627 print_packet(cf, NULL);
2629 /* The ANSI C standard does not appear to *require* that a line-buffered
2630 stream be flushed to the host environment whenever a newline is
2631 written, it just says that, on such a stream, characters "are
2632 intended to be transmitted to or from the host environment as a
2633 block when a new-line character is encountered".
2635 The Visual C++ 6.0 C implementation doesn't do what is intended;
2636 even if you set a stream to be line-buffered, it still doesn't
2637 flush the buffer at the end of every line.
2639 So, if the "-l" flag was specified, we flush the standard output
2640 at the end of a packet. This will do the right thing if we're
2641 printing packet summary lines, and, as we print the entire protocol
2642 tree for a single packet without waiting for anything to happen,
2643 it should be as good as line-buffered mode if we're printing
2644 protocol trees. (The whole reason for the "-l" flag in either
2645 tcpdump or TShark is to allow the output of a live capture to
2646 be piped to a program or script and to have that script see the
2647 information for the packet as soon as it's printed, rather than
2648 having to wait until a standard I/O buffer fills up. */
2652 if (ferror(stdout)) {
2653 show_print_file_io_error(errno);
2659 if (do_dissection) {
2660 epan_dissect_cleanup(&edt);
2666 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2667 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2670 int snapshot_length;
2674 gchar *err_info = NULL;
2676 char *save_file_string = NULL;
2677 gboolean filtering_tap_listeners;
2680 #ifdef PCAP_NG_DEFAULT
2681 linktype = WTAP_ENCAP_PER_PACKET;
2683 linktype = wtap_file_encap(cf->wth);
2685 if (save_file != NULL) {
2686 /* Get a string that describes what we're writing to */
2687 save_file_string = output_file_description(save_file);
2689 /* Set up to write to the capture file. */
2690 snapshot_length = wtap_snapshot_length(cf->wth);
2691 if (snapshot_length == 0) {
2692 /* Snapshot length of input file not known. */
2693 snapshot_length = WTAP_MAX_PACKET_SIZE;
2695 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2696 FALSE /* compressed */, &err);
2699 /* We couldn't set up to write to the capture file. */
2702 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2703 cmdarg_err("Capture files can't be written in that format.");
2706 case WTAP_ERR_UNSUPPORTED_ENCAP:
2707 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2708 cmdarg_err("The capture file being read can't be written as a "
2709 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2712 case WTAP_ERR_CANT_OPEN:
2713 cmdarg_err("The %s couldn't be created for some "
2714 "unknown reason.", save_file_string);
2717 case WTAP_ERR_SHORT_WRITE:
2718 cmdarg_err("A full header couldn't be written to the %s.",
2723 cmdarg_err("The %s could not be created: %s.", save_file_string,
2724 wtap_strerror(err));
2730 if (print_packet_info) {
2731 if (!write_preamble(cf)) {
2733 show_print_file_io_error(err);
2740 if (pdh && out_file_name_res) {
2741 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2742 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2743 wtap_file_type_short_string(out_file_type));
2747 /* Do we have any tap listeners with filters? */
2748 filtering_tap_listeners = have_filtering_tap_listeners();
2750 /* Get the union of the flags for all tap listeners. */
2751 tap_flags = union_of_tap_listener_flags();
2753 if (perform_two_pass_analysis) {
2755 int old_max_packet_count = max_packet_count;
2757 /* Allocate a frame_data_sequence for all the frames. */
2758 cf->frames = new_frame_data_sequence();
2760 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2761 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2762 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2763 /* Stop reading if we have the maximum number of packets;
2764 * When the -c option has not been used, max_packet_count
2765 * starts at 0, which practically means, never stop reading.
2766 * (unless we roll over max_packet_count ?)
2768 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2769 err = 0; /* This is not an error */
2775 /* Close the sequential I/O side, to free up memory it requires. */
2776 wtap_sequential_close(cf->wth);
2778 /* Allow the protocol dissectors to free up memory that they
2779 * don't need after the sequential run-through of the packets. */
2780 postseq_cleanup_all_protocols();
2782 max_packet_count = old_max_packet_count;
2784 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2785 fdata = frame_data_sequence_find(cf->frames, framenum);
2786 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2787 cf->pd, fdata->cap_len, &err, &err_info)) {
2788 if (process_packet_second_pass(cf, fdata,
2789 &cf->pseudo_header, cf->pd,
2790 filtering_tap_listeners, tap_flags)) {
2791 /* Either there's no read filtering or this packet passed the
2792 filter, so, if we're writing to a capture file, write
2795 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2796 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2798 /* Error writing to a capture file */
2801 case WTAP_ERR_UNSUPPORTED_ENCAP:
2803 * This is a problem with the particular frame we're writing;
2804 * note that, and give the frame number.
2806 * XXX - framenum is not necessarily the frame number in
2807 * the input file if there was a read filter.
2810 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2811 framenum, cf->filename,
2812 wtap_file_type_short_string(out_file_type));
2816 show_capture_file_io_error(save_file, err, FALSE);
2819 wtap_dump_close(pdh, &err);
2823 /* Stop reading if we have the maximum number of packets;
2824 * When the -c option has not been used, max_packet_count
2825 * starts at 0, which practically means, never stop reading.
2826 * (unless we roll over max_packet_count ?)
2828 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2829 err = 0; /* This is not an error */
2838 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2841 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2842 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2843 filtering_tap_listeners, tap_flags)) {
2844 /* Either there's no read filtering or this packet passed the
2845 filter, so, if we're writing to a capture file, write
2848 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2849 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2851 /* Error writing to a capture file */
2854 case WTAP_ERR_UNSUPPORTED_ENCAP:
2856 * This is a problem with the particular frame we're writing;
2857 * note that, and give the frame number.
2860 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2861 framenum, cf->filename,
2862 wtap_file_type_short_string(out_file_type));
2866 show_capture_file_io_error(save_file, err, FALSE);
2869 wtap_dump_close(pdh, &err);
2873 /* Stop reading if we have the maximum number of packets;
2874 * When the -c option has not been used, max_packet_count
2875 * starts at 0, which practically means, never stop reading.
2876 * (unless we roll over max_packet_count ?)
2878 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2879 err = 0; /* This is not an error */
2888 * Print a message noting that the read failed somewhere along the line.
2890 * If we're printing packet data, and the standard output and error are
2891 * going to the same place, flush the standard output, so everything
2892 * buffered up is written, and then print a newline to the standard error
2893 * before printing the error message, to separate it from the packet
2894 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2895 * the _fstat() documentation at Microsoft doesn't indicate whether
2896 * st_ino is even supported.)
2899 if (print_packet_info) {
2900 struct stat stat_stdout, stat_stderr;
2902 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2903 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2904 stat_stdout.st_ino == stat_stderr.st_ino) {
2906 fprintf(stderr, "\n");
2913 case WTAP_ERR_UNSUPPORTED_ENCAP:
2914 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2915 cf->filename, err_info);
2919 case WTAP_ERR_CANT_READ:
2920 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2924 case WTAP_ERR_SHORT_READ:
2925 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2929 case WTAP_ERR_BAD_FILE:
2930 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2931 cf->filename, err_info);
2935 case WTAP_ERR_DECOMPRESS:
2936 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2937 "(%s)", cf->filename, err_info);
2941 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2942 cf->filename, wtap_strerror(err));
2945 if (save_file != NULL) {
2946 /* Now close the capture file. */
2947 if (!wtap_dump_close(pdh, &err))
2948 show_capture_file_io_error(save_file, err, TRUE);
2951 if (save_file != NULL) {
2952 /* Now close the capture file. */
2953 if (!wtap_dump_close(pdh, &err))
2954 show_capture_file_io_error(save_file, err, TRUE);
2956 if (print_packet_info) {
2957 if (!write_finale()) {
2959 show_print_file_io_error(err);
2966 wtap_close(cf->wth);
2969 g_free(save_file_string);
2975 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2976 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2977 gboolean filtering_tap_listeners, guint tap_flags)
2980 gboolean create_proto_tree;
2985 /* Count this packet. */
2988 /* If we're not running a display filter and we're not printing any
2989 packet information, we don't need to do a dissection. This means
2990 that all packets can be marked as 'passed'. */
2993 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2995 /* If we're going to print packet information, or we're going to
2996 run a read filter, or we're going to process taps, set up to
2997 do a dissection and do so. */
2998 if (do_dissection) {
2999 if (print_packet_info && gbl_resolv_flags)
3000 /* Grab any resolved addresses */
3001 host_name_lookup_process(NULL);
3003 if (cf->rfcode || verbose || filtering_tap_listeners ||
3004 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3005 create_proto_tree = TRUE;
3007 create_proto_tree = FALSE;
3009 /* The protocol tree will be "visible", i.e., printed, only if we're
3010 printing packet details, which is true if we're printing stuff
3011 ("print_packet_info" is true) and we're in verbose mode ("verbose"
3013 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
3015 /* If we're running a read filter, prime the epan_dissect_t with that
3018 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3020 col_custom_prime_edt(&edt, &cf->cinfo);
3022 tap_queue_init(&edt);
3024 /* We only need the columns if either
3026 1) some tap needs the columns
3030 2) we're printing packet info but we're *not* verbose; in verbose
3031 mode, we print the protocol tree, not the protocol summary. */
3032 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
3037 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3038 &first_ts, &prev_dis_ts, &prev_cap_ts);
3040 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
3042 tap_push_tapped_queue(&edt);
3044 /* Run the read filter if we have one. */
3046 passed = dfilter_apply_edt(cf->rfcode, &edt);
3050 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
3052 /* Process this packet. */
3053 if (print_packet_info) {
3054 /* We're printing packet information; print the information for
3057 print_packet(cf, &edt);
3059 print_packet(cf, NULL);
3061 /* The ANSI C standard does not appear to *require* that a line-buffered
3062 stream be flushed to the host environment whenever a newline is
3063 written, it just says that, on such a stream, characters "are
3064 intended to be transmitted to or from the host environment as a
3065 block when a new-line character is encountered".
3067 The Visual C++ 6.0 C implementation doesn't do what is intended;
3068 even if you set a stream to be line-buffered, it still doesn't
3069 flush the buffer at the end of every line.
3071 So, if the "-l" flag was specified, we flush the standard output
3072 at the end of a packet. This will do the right thing if we're
3073 printing packet summary lines, and, as we print the entire protocol
3074 tree for a single packet without waiting for anything to happen,
3075 it should be as good as line-buffered mode if we're printing
3076 protocol trees. (The whole reason for the "-l" flag in either
3077 tcpdump or TShark is to allow the output of a live capture to
3078 be piped to a program or script and to have that script see the
3079 information for the packet as soon as it's printed, rather than
3080 having to wait until a standard I/O buffer fills up. */
3084 if (ferror(stdout)) {
3085 show_print_file_io_error(errno);
3091 if (do_dissection) {
3092 epan_dissect_cleanup(&edt);
3093 frame_data_cleanup(&fdata);
3099 write_preamble(capture_file *cf)
3101 switch (output_action) {
3104 return print_preamble(print_stream, cf ? cf->filename : NULL);
3108 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3110 write_psml_preamble(stdout);
3111 return !ferror(stdout);
3114 write_fields_preamble(output_fields, stdout);
3115 return !ferror(stdout);
3118 g_assert_not_reached();
3124 get_line_buf(size_t len)
3126 static char *line_bufp = NULL;
3127 static size_t line_buf_len = 256;
3128 size_t new_line_buf_len;
3130 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3131 new_line_buf_len *= 2)
3133 if (line_bufp == NULL) {
3134 line_buf_len = new_line_buf_len;
3135 line_bufp = g_malloc(line_buf_len + 1);
3137 if (new_line_buf_len > line_buf_len) {
3138 line_buf_len = new_line_buf_len;
3139 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3146 print_columns(capture_file *cf)
3153 line_bufp = get_line_buf(256);
3156 for (i = 0; i < cf->cinfo.num_cols; i++) {
3157 /* Skip columns not marked as visible. */
3158 if (!get_column_visible(i))
3160 switch (cf->cinfo.col_fmt[i]) {
3164 * Don't print this if we're doing a live capture from a network
3165 * interface - if we're doing a live capture, you won't be
3166 * able to look at the capture in the future (it's not being
3167 * saved anywhere), so the frame numbers are unlikely to be
3170 * (XXX - it might be nice to be able to save and print at
3171 * the same time, sort of like an "Update list of packets
3172 * in real time" capture in Wireshark.)
3174 if (global_capture_opts.ifaces->len > 0)
3177 column_len = strlen(cf->cinfo.col_data[i]);
3180 line_bufp = get_line_buf(buf_offset + column_len);
3181 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3187 case COL_ABS_DATE_TIME:
3189 case COL_UTC_DATE_TIME: /* XXX - wider */
3190 column_len = strlen(cf->cinfo.col_data[i]);
3191 if (column_len < 10)
3193 line_bufp = get_line_buf(buf_offset + column_len);
3194 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3200 case COL_DEF_DL_SRC:
3201 case COL_RES_DL_SRC:
3202 case COL_UNRES_DL_SRC:
3203 case COL_DEF_NET_SRC:
3204 case COL_RES_NET_SRC:
3205 case COL_UNRES_NET_SRC:
3206 column_len = strlen(cf->cinfo.col_data[i]);
3207 if (column_len < 12)
3209 line_bufp = get_line_buf(buf_offset + column_len);
3210 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3216 case COL_DEF_DL_DST:
3217 case COL_RES_DL_DST:
3218 case COL_UNRES_DL_DST:
3219 case COL_DEF_NET_DST:
3220 case COL_RES_NET_DST:
3221 case COL_UNRES_NET_DST:
3222 column_len = strlen(cf->cinfo.col_data[i]);
3223 if (column_len < 12)
3225 line_bufp = get_line_buf(buf_offset + column_len);
3226 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3230 column_len = strlen(cf->cinfo.col_data[i]);
3231 line_bufp = get_line_buf(buf_offset + column_len);
3232 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3235 buf_offset += column_len;
3236 if (i != cf->cinfo.num_cols - 1) {
3238 * This isn't the last column, so we need to print a
3239 * separator between this column and the next.
3241 * If we printed a network source and are printing a
3242 * network destination of the same type next, separate
3243 * them with " -> "; if we printed a network destination
3244 * and are printing a network source of the same type
3245 * next, separate them with " <- "; otherwise separate them
3248 * We add enough space to the buffer for " <- " or " -> ",
3249 * even if we're only adding " ".
3251 line_bufp = get_line_buf(buf_offset + 4);
3252 switch (cf->cinfo.col_fmt[i]) {
3257 switch (cf->cinfo.col_fmt[i + 1]) {
3262 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3267 g_strlcat(line_bufp + buf_offset, " ", 5);
3273 case COL_DEF_DL_SRC:
3274 case COL_RES_DL_SRC:
3275 case COL_UNRES_DL_SRC:
3276 switch (cf->cinfo.col_fmt[i + 1]) {
3278 case COL_DEF_DL_DST:
3279 case COL_RES_DL_DST:
3280 case COL_UNRES_DL_DST:
3281 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3286 g_strlcat(line_bufp + buf_offset, " ", 5);
3292 case COL_DEF_NET_SRC:
3293 case COL_RES_NET_SRC:
3294 case COL_UNRES_NET_SRC:
3295 switch (cf->cinfo.col_fmt[i + 1]) {
3297 case COL_DEF_NET_DST:
3298 case COL_RES_NET_DST:
3299 case COL_UNRES_NET_DST:
3300 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3305 g_strlcat(line_bufp + buf_offset, " ", 5);
3314 switch (cf->cinfo.col_fmt[i + 1]) {
3319 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3324 g_strlcat(line_bufp + buf_offset, " ", 5);
3330 case COL_DEF_DL_DST:
3331 case COL_RES_DL_DST:
3332 case COL_UNRES_DL_DST:
3333 switch (cf->cinfo.col_fmt[i + 1]) {
3335 case COL_DEF_DL_SRC:
3336 case COL_RES_DL_SRC:
3337 case COL_UNRES_DL_SRC:
3338 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3343 g_strlcat(line_bufp + buf_offset, " ", 5);
3349 case COL_DEF_NET_DST:
3350 case COL_RES_NET_DST:
3351 case COL_UNRES_NET_DST:
3352 switch (cf->cinfo.col_fmt[i + 1]) {
3354 case COL_DEF_NET_SRC:
3355 case COL_RES_NET_SRC:
3356 case COL_UNRES_NET_SRC:
3357 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3362 g_strlcat(line_bufp + buf_offset, " ", 5);
3369 g_strlcat(line_bufp + buf_offset, " ", 5);
3375 return print_line(print_stream, 0, line_bufp);
3379 print_packet(capture_file *cf, epan_dissect_t *edt)
3381 print_args_t print_args;
3384 /* Print the information in the protocol tree. */
3385 switch (output_action) {
3388 print_args.to_file = TRUE;
3389 print_args.format = print_format;
3390 print_args.print_summary = !verbose;
3391 print_args.print_hex = verbose && print_hex;
3392 print_args.print_formfeed = FALSE;
3393 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3395 /* init the packet range */
3396 packet_range_init(&print_args.range);
3398 if (!proto_tree_print(&print_args, edt, print_stream))
3401 /* "print_hex_data()" will put out a leading blank line, as well
3402 as a trailing one; print one here, to separate the packets,
3403 only if "print_hex_data()" won't be called. */
3404 if (!print_line(print_stream, 0, separator))
3410 proto_tree_write_pdml(edt, stdout);
3412 return !ferror(stdout);
3414 proto_tree_write_fields(output_fields, edt, stdout);
3416 return !ferror(stdout);
3419 /* Just fill in the columns. */
3420 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3422 /* Now print them. */
3423 switch (output_action) {
3426 if (!print_columns(cf))
3431 proto_tree_write_psml(edt, stdout);
3432 return !ferror(stdout);
3433 case WRITE_FIELDS: /*No non-verbose "fields" format */
3434 g_assert_not_reached();
3439 if (!print_hex_data(print_stream, edt))
3441 if (!print_line(print_stream, 0, ""))
3450 switch (output_action) {
3453 return print_finale(print_stream);
3457 write_pdml_finale(stdout);
3459 write_psml_finale(stdout);
3460 return !ferror(stdout);
3463 write_fields_finale(output_fields, stdout);
3464 return !ferror(stdout);
3467 g_assert_not_reached();
3473 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3477 char err_msg[2048+1];
3479 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3483 /* The open succeeded. Fill in the information for this file. */
3485 /* Cleanup all data structures used for dissection. */
3486 cleanup_dissection();
3487 /* Initialize all data structures used for dissection. */
3491 cf->f_datalen = 0; /* not used, but set it anyway */
3493 /* Set the file name because we need it to set the follow stream filter.
3494 XXX - is that still true? We need it for other reasons, though,
3496 cf->filename = g_strdup(fname);
3498 /* Indicate whether it's a permanent or temporary file. */
3499 cf->is_tempfile = is_tempfile;
3501 /* If it's a temporary capture buffer file, mark it as not saved. */
3502 cf->user_saved = !is_tempfile;
3504 cf->cd_t = wtap_file_type(cf->wth);
3506 cf->drops_known = FALSE;
3508 cf->snap = wtap_snapshot_length(cf->wth);
3509 if (cf->snap == 0) {
3510 /* Snapshot length not known. */
3511 cf->has_snap = FALSE;
3512 cf->snap = WTAP_MAX_PACKET_SIZE;
3514 cf->has_snap = TRUE;
3515 nstime_set_zero(&cf->elapsed_time);
3516 nstime_set_unset(&first_ts);
3517 nstime_set_unset(&prev_dis_ts);
3518 nstime_set_unset(&prev_cap_ts);
3520 cf->state = FILE_READ_IN_PROGRESS;
3522 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3523 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3528 g_snprintf(err_msg, sizeof err_msg,
3529 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3530 cmdarg_err("%s", err_msg);
3535 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3537 char *save_file_string;
3539 save_file_string = output_file_description(fname);
3544 cmdarg_err("Not all the packets could be written to the %s because there is "
3545 "no space left on the file system.",
3551 cmdarg_err("Not all the packets could be written to the %s because you are "
3552 "too close to, or over your disk quota.",
3557 case WTAP_ERR_CANT_CLOSE:
3558 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3562 case WTAP_ERR_SHORT_WRITE:
3563 cmdarg_err("Not all the packets could be written to the %s.",
3569 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3570 wtap_strerror(err));
3572 cmdarg_err("An error occurred while writing to the %s: %s.",
3573 save_file_string, wtap_strerror(err));
3577 g_free(save_file_string);
3581 show_print_file_io_error(int err)
3586 cmdarg_err("Not all the packets could be printed because there is "
3587 "no space left on the file system.");
3592 cmdarg_err("Not all the packets could be printed because you are "
3593 "too close to, or over your disk quota.");
3598 cmdarg_err("An error occurred while printing packets: %s.",
3605 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3609 static char errmsg_errno[1024+1];
3612 /* Wiretap error. */
3615 case WTAP_ERR_NOT_REGULAR_FILE:
3616 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3619 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3620 /* Seen only when opening a capture file for reading. */
3621 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3624 case WTAP_ERR_UNSUPPORTED:
3625 /* Seen only when opening a capture file for reading. */
3626 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3627 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3630 errmsg = errmsg_errno;
3633 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3634 /* Seen only when opening a capture file for writing. */
3635 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3636 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3637 "written to a pipe.", wtap_file_type_short_string(file_type));
3638 errmsg = errmsg_errno;
3641 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3642 /* Seen only when opening a capture file for writing. */
3643 errmsg = "TShark doesn't support writing capture files in that format.";
3646 case WTAP_ERR_UNSUPPORTED_ENCAP:
3648 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3649 "TShark can't save this capture as a \"%s\" file.",
3650 wtap_file_type_short_string(file_type));
3652 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3653 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3657 errmsg = errmsg_errno;
3660 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3662 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3663 "TShark can't save this capture as a \"%s\" file.",
3664 wtap_file_type_short_string(file_type));
3665 errmsg = errmsg_errno;
3667 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3670 case WTAP_ERR_BAD_FILE:
3671 /* Seen only when opening a capture file for reading. */
3672 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3673 "The file \"%%s\" appears to be damaged or corrupt.\n"
3676 errmsg = errmsg_errno;
3679 case WTAP_ERR_CANT_OPEN:
3681 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3683 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3686 case WTAP_ERR_SHORT_READ:
3687 errmsg = "The file \"%s\" appears to have been cut short"
3688 " in the middle of a packet or other data.";
3691 case WTAP_ERR_SHORT_WRITE:
3692 errmsg = "A full header couldn't be written to the file \"%s\".";
3695 case WTAP_ERR_DECOMPRESS:
3696 /* Seen only when opening a capture file for reading. */
3697 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3698 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3701 errmsg = errmsg_errno;
3705 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3706 "The file \"%%s\" could not be %s: %s.",
3707 for_writing ? "created" : "opened",
3708 wtap_strerror(err));
3709 errmsg = errmsg_errno;
3713 errmsg = file_open_error_message(err, for_writing);
3718 * Open/create errors are reported with an console message in TShark.
3721 open_failure_message(const char *filename, int err, gboolean for_writing)
3723 fprintf(stderr, "tshark: ");
3724 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3725 fprintf(stderr, "\n");
3730 * General errors are reported with an console message in TShark.
3733 failure_message(const char *msg_format, va_list ap)
3735 fprintf(stderr, "tshark: ");
3736 vfprintf(stderr, msg_format, ap);
3737 fprintf(stderr, "\n");
3741 * Read errors are reported with an console message in TShark.
3744 read_failure_message(const char *filename, int err)
3746 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3747 filename, g_strerror(err));
3751 * Write errors are reported with an console message in TShark.
3754 write_failure_message(const char *filename, int err)
3756 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3757 filename, g_strerror(err));
3761 * Print to the standard error. This is a command-line tool, so there's
3762 * no need to pop up a console.
3765 vfprintf_stderr(const char *fmt, va_list ap)
3767 vfprintf(stderr, fmt, ap);
3771 fprintf_stderr(const char *fmt, ...)
3776 vfprintf_stderr(fmt, ap);
3781 * Report an error in command-line arguments.
3784 cmdarg_err(const char *fmt, ...)
3789 failure_message(fmt, ap);
3794 * Report additional information for an error in command-line arguments.
3797 cmdarg_err_cont(const char *fmt, ...)
3802 vfprintf(stderr, fmt, ap);
3803 fprintf(stderr, "\n");