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>
98 #include "capture_opts.h"
101 * This is the template for the decode as option; it is shared between the
102 * various functions that output the usage for this parameter.
104 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
106 static guint32 cum_bytes;
107 static nstime_t first_ts;
108 static nstime_t prev_dis_ts;
109 static nstime_t prev_cap_ts;
111 static gboolean print_packet_info; /* TRUE if we're to print packet information */
113 static gboolean perform_two_pass_analysis;
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
125 static output_action_e output_action;
126 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
127 static gboolean verbose;
128 static gboolean print_hex;
129 static gboolean line_buffered;
131 static print_format_e print_format = PR_FMT_TEXT;
132 static print_stream_t *print_stream;
134 static output_fields_t* output_fields = NULL;
136 /* The line separator used between packets, changeable via the -S option */
137 static char *separator = "";
141 * TRUE if we're to print packet counts to keep track of captured packets.
143 static gboolean print_packet_counts;
145 static capture_options global_capture_opts;
148 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
149 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
152 static gboolean capture(void);
153 static void report_counts(void);
155 static BOOL WINAPI capture_cleanup(DWORD);
157 static void capture_cleanup(int);
159 static void report_counts_siginfo(int);
162 #endif /* HAVE_LIBPCAP */
164 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
165 static gboolean process_packet(capture_file *cf, gint64 offset,
166 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
167 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
168 static void show_capture_file_io_error(const char *, int, gboolean);
169 static void show_print_file_io_error(int err);
170 static gboolean write_preamble(capture_file *cf);
171 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
172 static gboolean write_finale(void);
173 static const char *cf_open_error_message(int err, gchar *err_info,
174 gboolean for_writing, int file_type);
176 static void open_failure_message(const char *filename, int err,
177 gboolean for_writing);
178 static void failure_message(const char *msg_format, va_list ap);
179 static void read_failure_message(const char *filename, int err);
180 static void write_failure_message(const char *filename, int err);
185 const char *sstr; /* The short string */
186 const char *lstr; /* The long string */
190 string_compare(gconstpointer a, gconstpointer b)
192 return strcmp(((const struct string_elem *)a)->sstr,
193 ((const struct string_elem *)b)->sstr);
197 string_elem_print(gpointer data, gpointer not_used _U_)
199 fprintf(stderr, " %s - %s\n",
200 ((struct string_elem *)data)->sstr,
201 ((struct string_elem *)data)->lstr);
205 list_capture_types(void) {
207 struct string_elem *captypes;
210 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
212 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
213 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
214 if (wtap_dump_can_open(i)) {
215 captypes[i].sstr = wtap_file_type_short_string(i);
216 captypes[i].lstr = wtap_file_type_string(i);
217 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
220 g_slist_foreach(list, string_elem_print, NULL);
226 print_usage(gboolean print_ver)
233 "TShark " VERSION "%s\n"
234 "Dump and analyze network traffic.\n"
235 "See http://www.wireshark.org for more information.\n"
238 wireshark_svnversion, get_copyright_info());
242 fprintf(output, "\n");
243 fprintf(output, "Usage: tshark [options] ...\n");
244 fprintf(output, "\n");
247 fprintf(output, "Capture interface:\n");
248 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
249 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
250 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
251 fprintf(output, " -p don't capture in promiscuous mode\n");
252 #ifdef HAVE_PCAP_CREATE
253 fprintf(output, " -I capture in monitor mode, if available\n");
255 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
256 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
258 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
259 fprintf(output, " -D print list of interfaces and exit\n");
260 fprintf(output, " -L print list of link-layer types of iface and exit\n");
261 fprintf(output, "\n");
262 fprintf(output, "Capture stop conditions:\n");
263 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
264 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
265 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
266 fprintf(output, " files:NUM - stop after NUM files\n");
267 /*fprintf(output, "\n");*/
268 fprintf(output, "Capture output:\n");
269 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
270 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
271 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
272 #endif /* HAVE_LIBPCAP */
274 /*fprintf(output, "\n");*/
275 fprintf(output, "Input file:\n");
276 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
278 fprintf(output, "\n");
279 fprintf(output, "Processing:\n");
280 fprintf(output, " -2 perform a two-pass analysis\n");
281 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
282 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
283 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
284 fprintf(output, " -d %s ...\n", decode_as_arg_template);
285 fprintf(output, " \"Decode As\", see the man page for details\n");
286 fprintf(output, " Example: tcp.port==8888,http\n");
287 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
288 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
290 /*fprintf(output, "\n");*/
291 fprintf(output, "Output:\n");
292 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
293 fprintf(output, " (or to the standard output for \"-\")\n");
294 fprintf(output, " -C <config profile> start with specified configuration profile\n");
295 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
296 fprintf(output, " an empty \"-F\" option will list the file types\n");
297 fprintf(output, " -V add output of packet tree (Packet Details)\n");
298 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
299 fprintf(output, " separated\n");
300 fprintf(output, " -P print packets even when writing to a file\n");
301 fprintf(output, " -S <separator> the line separator to print between packets\n");
302 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
303 fprintf(output, " -T pdml|ps|psml|text|fields\n");
304 fprintf(output, " format of text output (def: text)\n");
305 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
306 fprintf(output, " this option can be repeated to print multiple fields\n");
307 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
308 fprintf(output, " header=y|n switch headers on and off\n");
309 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
310 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
311 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
312 fprintf(output, " aggregator\n");
313 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
314 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
315 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
316 fprintf(output, " -l flush standard output after each packet\n");
317 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
318 fprintf(output, " -W n Save extra information in the file, if supported.\n");
319 fprintf(output, " n = write network address resolution information\n");
320 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
321 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
323 fprintf(output, "\n");
324 fprintf(output, "Miscellaneous:\n");
325 fprintf(output, " -h display this help and exit\n");
326 fprintf(output, " -v display version info and exit\n");
327 fprintf(output, " -o <name>:<value> ... override preference setting\n");
328 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
329 fprintf(output, " -G [report] dump one of several available reports and exit\n");
330 fprintf(output, " default report=\"fields\"\n");
331 fprintf(output, " use \"-G ?\" for more help\n");
335 glossary_option_help(void)
341 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
343 fprintf(output, "\n");
344 fprintf(output, "Usage: tshark -G [report]\n");
345 fprintf(output, "\n");
346 fprintf(output, "Glossary table reports:\n");
347 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
348 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
349 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
350 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
351 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
352 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
353 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
354 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
355 fprintf(output, "\n");
356 fprintf(output, "Preference reports:\n");
357 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
358 fprintf(output, " -G currentprefs dump current preferences and exit\n");
359 fprintf(output, "\n");
364 * For a dissector table, print on the stream described by output,
365 * its short name (which is what's used in the "-d" option) and its
369 display_dissector_table_names(const char *table_name, const char *ui_name,
372 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
376 * For a dissector handle, print on the stream described by output,
377 * the filter name (which is what's used in the "-d" option) and the full
378 * name for the protocol that corresponds to this handle.
381 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
384 const gchar* proto_filter_name;
385 const gchar* proto_ui_name;
387 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
389 if (proto_id != -1) {
390 proto_filter_name = proto_get_protocol_filter_name(proto_id);
391 proto_ui_name = proto_get_protocol_name(proto_id);
392 g_assert(proto_filter_name != NULL);
393 g_assert(proto_ui_name != NULL);
395 fprintf((FILE *)output, "\t%s (%s)\n",
402 * The protocol_name_search structure is used by find_protocol_name_func()
403 * to pass parameters and store results
405 struct protocol_name_search{
406 gchar *searched_name; /* Protocol filter name we are looking for */
407 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
408 guint nb_match; /* How many dissectors matched searched_name */
410 typedef struct protocol_name_search *protocol_name_search_t;
413 * This function parses all dissectors associated with a table to find the
414 * one whose protocol has the specified filter name. It is called
415 * as a reference function in a call to dissector_table_foreach_handle.
416 * The name we are looking for, as well as the results, are stored in the
417 * protocol_name_search struct pointed to by user_data.
418 * If called using dissector_table_foreach_handle, we actually parse the
419 * whole list of dissectors.
422 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
426 const gchar *protocol_filter_name;
427 protocol_name_search_t search_info;
431 search_info = (protocol_name_search_t)user_data;
433 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
434 if (proto_id != -1) {
435 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
436 g_assert(protocol_filter_name != NULL);
437 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
439 if (search_info->nb_match == 0) {
440 /* Record this handle only if this is the first match */
441 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
443 search_info->nb_match++;
449 * Print all layer type names supported.
450 * We send the output to the stream described by the handle output.
454 fprint_all_layer_types(FILE *output)
457 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
461 * Print all protocol names supported for a specific layer type.
462 * table_name contains the layer type name in which the search is performed.
463 * We send the output to the stream described by the handle output.
467 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
470 dissector_table_foreach_handle(table_name,
471 display_dissector_names,
476 * The function below parses the command-line parameters for the decode as
477 * feature (a string pointer by cl_param).
478 * It checks the format of the command-line, searches for a matching table
479 * and dissector. If a table/dissector match is not found, we display a
480 * summary of the available tables/dissectors (on stderr) and return FALSE.
481 * If everything is fine, we get the "Decode as" preference activated,
482 * then we return TRUE.
485 add_decode_as(const gchar *cl_param)
489 gchar *decoded_param;
490 gchar *remaining_param;
492 gchar *dissector_str;
493 dissector_handle_t dissector_matching;
494 dissector_table_t table_matching;
495 ftenum_t dissector_table_selector_type;
496 struct protocol_name_search user_protocol_name;
498 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
501 decoded_param = g_strdup(cl_param);
502 g_assert(decoded_param);
505 /* The lines below will parse this string (modifying it) to extract all
506 necessary information. Note that decoded_param is still needed since
507 strings are not copied - we just save pointers. */
509 /* This section extracts a layer type (table_name) from decoded_param */
510 table_name = decoded_param; /* Layer type string starts from beginning */
512 remaining_param = strchr(table_name, '=');
513 if (remaining_param == NULL) {
514 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
515 /* If the argument does not follow the template, carry on anyway to check
516 if the table name is at least correct. If remaining_param is NULL,
517 we'll exit anyway further down */
520 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
523 /* Remove leading and trailing spaces from the table name */
524 while ( table_name[0] == ' ' )
526 while ( table_name[strlen(table_name) - 1] == ' ' )
527 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
529 /* The following part searches a table matching with the layer type specified */
530 table_matching = NULL;
532 /* Look for the requested table */
533 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
534 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
537 table_matching = find_dissector_table(table_name);
538 if (!table_matching) {
539 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
543 if (!table_matching) {
544 /* Display a list of supported layer types to help the user, if the
545 specified layer type was not found */
546 cmdarg_err("Valid layer types are:");
547 fprint_all_layer_types(stderr);
549 if (remaining_param == NULL || !table_matching) {
550 /* Exit if the layer type was not found, or if no '=' separator was found
552 g_free(decoded_param);
556 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
557 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
560 remaining_param++; /* Move to the second '=' */
561 *remaining_param = '\0'; /* Remove the second '=' */
563 remaining_param++; /* Position after the layer type string */
565 /* This section extracts a selector value (selector_str) from decoded_param */
567 selector_str = remaining_param; /* Next part starts with the selector number */
569 remaining_param = strchr(selector_str, ',');
570 if (remaining_param == NULL) {
571 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
572 /* If the argument does not follow the template, carry on anyway to check
573 if the selector value is at least correct. If remaining_param is NULL,
574 we'll exit anyway further down */
577 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
580 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
582 switch (dissector_table_selector_type) {
588 /* The selector for this table is an unsigned number. Parse it as such.
589 There's no need to remove leading and trailing spaces from the
590 selector number string, because sscanf will do that for us. */
591 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
592 cmdarg_err("Invalid selector number \"%s\"", selector_str);
593 g_free(decoded_param);
600 /* The selector for this table is a string. */
604 /* There are currently no dissector tables with any types other
605 than the ones listed above. */
606 g_assert_not_reached();
609 if (remaining_param == NULL) {
610 /* Exit if no ',' separator was found (see above) */
611 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
612 fprint_all_protocols_for_layer_types(stderr, table_name);
613 g_free(decoded_param);
617 remaining_param++; /* Position after the selector number string */
619 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
621 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
623 /* Remove leading and trailing spaces from the dissector name */
624 while ( dissector_str[0] == ' ' )
626 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
627 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
629 dissector_matching = NULL;
631 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
632 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 */
633 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
636 user_protocol_name.nb_match = 0;
637 user_protocol_name.searched_name = dissector_str;
638 user_protocol_name.matched_handle = NULL;
640 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 */
642 if (user_protocol_name.nb_match != 0) {
643 dissector_matching = user_protocol_name.matched_handle;
644 if (user_protocol_name.nb_match > 1) {
645 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
649 /* OK, check whether the problem is that there isn't any such
650 protocol, or that there is but it's not specified as a protocol
651 that's valid for that dissector table.
652 Note, we don't exit here, but dissector_matching will remain NULL,
654 if (proto_get_id_by_filter_name(dissector_str) == -1) {
655 /* No such protocol */
656 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
658 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
659 dissector_str, table_name);
664 if (!dissector_matching) {
665 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
666 fprint_all_protocols_for_layer_types(stderr, table_name);
667 g_free(decoded_param);
671 /* This is the end of the code that parses the command-line options.
672 All information is now stored in the variables:
676 The above variables that are strings are still pointing to areas within
677 decoded_parm. decoded_parm thus still needs to be kept allocated in
678 until we stop needing these variables
679 decoded_param will be deallocated at each exit point of this function */
682 /* We now have a pointer to the handle for the requested dissector
683 (requested protocol) inside the variable dissector_matching */
684 switch (dissector_table_selector_type) {
690 /* The selector for this table is an unsigned number. */
691 dissector_change_uint(table_name, selector, dissector_matching);
696 /* The selector for this table is a string. */
697 dissector_change_string(table_name, selector_str, dissector_matching);
701 /* There are currently no dissector tables with any types other
702 than the ones listed above. */
703 g_assert_not_reached();
705 g_free(decoded_param); /* "Decode As" rule has been successfully added */
710 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
711 const gchar *message, gpointer user_data)
713 /* ignore log message, if log_level isn't interesting based
714 upon the console log preferences.
715 If the preferences haven't been loaded loaded yet, display the
718 The default console_log_level preference value is such that only
719 ERROR, CRITICAL and WARNING level messages are processed;
720 MESSAGE, INFO and DEBUG level messages are ignored.
722 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
723 ERROR and CRITICAL level messages so the current code is a behavioral
724 change. The current behavior is the same as in Wireshark.
726 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
727 prefs.console_log_level != 0) {
731 g_log_default_handler(log_domain, log_level, message, user_data);
736 output_file_description(const char *fname)
738 char *save_file_string;
740 /* Get a string that describes what we're writing to */
741 if (strcmp(fname, "-") == 0) {
742 /* We're writing to the standard output */
743 save_file_string = g_strdup("standard output");
745 /* We're writing to a file with the name in save_file */
746 save_file_string = g_strdup_printf("file \"%s\"", fname);
748 return save_file_string;
752 print_current_user(void) {
753 gchar *cur_user, *cur_group;
754 if (started_with_special_privs()) {
755 cur_user = get_cur_username();
756 cur_group = get_cur_groupname();
757 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
758 cur_user, cur_group);
759 if (running_with_special_privs()) {
760 fprintf(stderr, "Running as user \"%s\" and group \"%s\". This could be dangerous.\n",
761 cur_user, cur_group);
764 fprintf(stdout, "Running as user \"%s\" and group \"%s\".",
765 cur_user, cur_group);
773 check_capture_privs(void) {
776 /* Warn the user if npf.sys isn't loaded. */
777 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
778 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
779 "capturing or\nlisting interfaces.\n");
785 show_version(GString *comp_info_str, GString *runtime_info_str)
787 printf("TShark " VERSION "%s\n"
794 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
795 runtime_info_str->str);
799 main(int argc, char *argv[])
801 char *init_progfile_dir_error;
803 gboolean arg_error = FALSE;
809 char *gpf_path, *pf_path;
810 char *gdp_path, *dp_path;
811 int gpf_open_errno, gpf_read_errno;
812 int pf_open_errno, pf_read_errno;
813 int gdp_open_errno, gdp_read_errno;
814 int dp_open_errno, dp_read_errno;
816 volatile int exit_status = 0;
818 gboolean list_link_layer_types = FALSE;
819 gboolean start_capture = FALSE;
824 interface_options interface_opts;
826 gboolean capture_option_specified = FALSE;
828 gboolean quiet = FALSE;
829 #ifdef PCAP_NG_DEFAULT
830 volatile int out_file_type = WTAP_FILE_PCAPNG;
832 volatile int out_file_type = WTAP_FILE_PCAP;
834 volatile gboolean out_file_name_res = FALSE;
835 gchar *volatile cf_name = NULL;
836 gchar *rfilter = NULL;
837 #ifdef HAVE_PCAP_OPEN_DEAD
838 struct bpf_program fcode;
840 dfilter_t *rfcode = NULL;
843 GLogLevelFlags log_flags;
845 gchar *output_only = NULL;
848 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
849 #define OPTSTRING_B "B:"
851 #define OPTSTRING_B ""
852 #endif /* _WIN32 or HAVE_PCAP_CREATE */
853 #else /* HAVE_LIBPCAP */
854 #define OPTSTRING_B ""
855 #endif /* HAVE_LIBPCAP */
857 #ifdef HAVE_PCAP_CREATE
858 #define OPTSTRING_I "I"
860 #define OPTSTRING_I ""
863 #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:"
865 static const char optstring[] = OPTSTRING;
868 arg_list_utf_16to8(argc, argv);
869 #if !GLIB_CHECK_VERSION(2,31,0)
875 * Get credential information for later use.
877 init_process_policies();
880 * Attempt to get the pathname of the executable file.
882 init_progfile_dir_error = init_progfile_dir(argv[0], main);
883 if (init_progfile_dir_error != NULL) {
884 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
885 init_progfile_dir_error);
889 * In order to have the -X opts assigned before the wslua machine starts
890 * we need to call getopts before epan_init() gets called.
893 optind_initial = optind;
895 while ((opt = getopt(argc, argv, optstring)) != -1) {
897 case 'C': /* Configuration Profile */
898 if (profile_exists (optarg, FALSE)) {
899 set_profile_name (optarg);
901 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
913 optind = optind_initial;
918 /** Send All g_log messages to our own handler **/
922 G_LOG_LEVEL_CRITICAL|
927 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
929 g_log_set_handler(NULL,
931 tshark_log_handler, NULL /* user_data */);
932 g_log_set_handler(LOG_DOMAIN_MAIN,
934 tshark_log_handler, NULL /* user_data */);
937 g_log_set_handler(LOG_DOMAIN_CAPTURE,
939 tshark_log_handler, NULL /* user_data */);
940 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
942 tshark_log_handler, NULL /* user_data */);
945 initialize_funnel_ops();
948 capture_opts_init(&global_capture_opts, &cfile);
951 timestamp_set_type(TS_RELATIVE);
952 timestamp_set_precision(TS_PREC_AUTO);
953 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
955 /* Register all dissectors; we must do this before checking for the
956 "-G" flag, as the "-G" flag dumps information registered by the
957 dissectors, and we must do it before we read the preferences, in
958 case any dissectors register preferences. */
959 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
960 failure_message, open_failure_message, read_failure_message,
961 write_failure_message);
963 /* Register all tap listeners; we do this before we parse the arguments,
964 as the "-z" argument can specify a registered tap. */
966 /* we register the plugin taps before the other taps because
967 stats_tree taps plugins will be registered as tap listeners
968 by stats_tree_stat.c and need to registered before that */
970 register_all_plugin_tap_listeners();
972 register_all_tap_listeners();
974 /* Now register the preferences for any non-dissector modules.
975 We must do that before we read the preferences as well. */
976 prefs_register_modules();
978 /* If invoked with the "-G" flag, we dump out information based on
979 the argument to the "-G" flag; if no argument is specified,
980 for backwards compatibility we dump out a glossary of display
983 XXX - we do this here, for now, to support "-G" with no arguments.
984 If none of our build or other processes uses "-G" with no arguments,
985 we can just process it with the other arguments. */
986 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
987 proto_initialize_all_prefixes();
990 proto_registrar_dump_fields(1);
992 if (strcmp(argv[2], "fields") == 0)
993 proto_registrar_dump_fields(1);
994 else if (strcmp(argv[2], "fields2") == 0)
995 proto_registrar_dump_fields(2);
996 else if (strcmp(argv[2], "fields3") == 0)
997 proto_registrar_dump_fields(3);
998 else if (strcmp(argv[2], "protocols") == 0)
999 proto_registrar_dump_protocols();
1000 else if (strcmp(argv[2], "values") == 0)
1001 proto_registrar_dump_values();
1002 else if (strcmp(argv[2], "ftypes") == 0)
1003 proto_registrar_dump_ftypes();
1004 else if (strcmp(argv[2], "decodes") == 0)
1005 dissector_dump_decodes();
1006 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1007 dissector_dump_heur_decodes();
1008 else if (strcmp(argv[2], "defaultprefs") == 0)
1010 else if (strcmp(argv[2], "plugins") == 0)
1012 else if (strcmp(argv[2], "?") == 0)
1013 glossary_option_help();
1014 else if (strcmp(argv[2], "-?") == 0)
1015 glossary_option_help();
1016 else if (strcmp(argv[2], "currentprefs") == 0) {
1017 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1018 &pf_open_errno, &pf_read_errno, &pf_path);
1021 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1028 /* Set the C-language locale to the native environment. */
1029 setlocale(LC_ALL, "");
1031 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1032 &pf_open_errno, &pf_read_errno, &pf_path);
1033 if (gpf_path != NULL) {
1034 if (gpf_open_errno != 0) {
1035 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1036 pf_path, g_strerror(gpf_open_errno));
1038 if (gpf_read_errno != 0) {
1039 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1040 pf_path, g_strerror(gpf_read_errno));
1043 if (pf_path != NULL) {
1044 if (pf_open_errno != 0) {
1045 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1046 g_strerror(pf_open_errno));
1048 if (pf_read_errno != 0) {
1049 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1050 pf_path, g_strerror(pf_read_errno));
1056 /* Set the name resolution code's flags from the preferences. */
1057 gbl_resolv_flags = prefs_p->name_resolve;
1059 /* Read the disabled protocols file. */
1060 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1061 &dp_path, &dp_open_errno, &dp_read_errno);
1062 if (gdp_path != NULL) {
1063 if (gdp_open_errno != 0) {
1064 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1065 gdp_path, g_strerror(gdp_open_errno));
1067 if (gdp_read_errno != 0) {
1068 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1069 gdp_path, g_strerror(gdp_read_errno));
1073 if (dp_path != NULL) {
1074 if (dp_open_errno != 0) {
1076 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1077 g_strerror(dp_open_errno));
1079 if (dp_read_errno != 0) {
1081 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1082 g_strerror(dp_read_errno));
1087 check_capture_privs();
1089 cap_file_init(&cfile);
1091 /* Print format defaults to this. */
1092 print_format = PR_FMT_TEXT;
1094 output_fields = output_fields_new();
1096 /* Now get our args */
1097 while ((opt = getopt(argc, argv, optstring)) != -1) {
1099 case '2': /* Perform two pass analysis */
1100 perform_two_pass_analysis = TRUE;
1102 case 'a': /* autostop criteria */
1103 case 'b': /* Ringbuffer option */
1104 case 'c': /* Capture x packets */
1105 case 'f': /* capture filter */
1106 case 'i': /* Use interface x */
1107 case 'p': /* Don't capture in promiscuous mode */
1108 #ifdef HAVE_PCAP_CREATE
1109 case 'I': /* Capture in monitor mode, if available */
1111 case 's': /* Set the snapshot (capture) length */
1112 case 'w': /* Write to capture file x */
1113 case 'y': /* Set the pcap data link type */
1114 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1115 case 'B': /* Buffer size */
1116 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1118 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1123 capture_option_specified = TRUE;
1128 /* Configuration profile settings were already processed just ignore them this time*/
1130 case 'd': /* Decode as rule */
1131 if (!add_decode_as(optarg))
1134 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1135 case 'K': /* Kerberos keytab file */
1136 read_keytab_file(optarg);
1139 case 'D': /* Print a list of capture devices and exit */
1141 if_list = capture_interface_list(&err, &err_str);
1142 if (if_list == NULL) {
1144 case CANT_GET_INTERFACE_LIST:
1145 case DONT_HAVE_PCAP:
1146 cmdarg_err("%s", err_str);
1150 case NO_INTERFACES_FOUND:
1151 cmdarg_err("There are no interfaces on which a capture can be done");
1156 capture_opts_print_interfaces(if_list);
1157 free_interface_list(if_list);
1160 capture_option_specified = TRUE;
1166 output_fields_add(output_fields, optarg);
1170 if(!output_fields_set_option(output_fields, optarg)) {
1171 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1172 output_fields_list_options(stderr);
1177 out_file_type = wtap_short_string_to_file_type(optarg);
1178 if (out_file_type < 0) {
1179 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1180 list_capture_types();
1184 case 'W': /* Select extra information to save in our capture file */
1185 /* This is patterned after the -N flag which may not be the best idea. */
1186 if (strchr(optarg, 'n'))
1187 out_file_name_res = TRUE;
1189 case 'H': /* Read address to name mappings from a hosts file */
1190 if (! read_hosts_file(optarg))
1192 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1195 out_file_name_res = TRUE;
1198 case 'h': /* Print help and exit */
1202 case 'l': /* "Line-buffer" standard output */
1203 /* This isn't line-buffering, strictly speaking, it's just
1204 flushing the standard output after the information for
1205 each packet is printed; however, that should be good
1206 enough for all the purposes to which "-l" is put (and
1207 is probably actually better for "-V", as it does fewer
1210 See the comment in "process_packet()" for an explanation of
1211 why we do that, and why we don't just use "setvbuf()" to
1212 make the standard output line-buffered (short version: in
1213 Windows, "line-buffered" is the same as "fully-buffered",
1214 and the output buffer is only flushed when it fills up). */
1215 line_buffered = TRUE;
1217 case 'L': /* Print list of link-layer types and exit */
1219 list_link_layer_types = TRUE;
1221 capture_option_specified = TRUE;
1225 case 'n': /* No name resolution */
1226 gbl_resolv_flags = RESOLV_NONE;
1228 case 'N': /* Select what types of addresses/port #s to resolve */
1229 if (gbl_resolv_flags == RESOLV_ALL)
1230 gbl_resolv_flags = RESOLV_NONE;
1231 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1232 if (badopt != '\0') {
1233 cmdarg_err("-N specifies unknown resolving option '%c';",
1235 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1239 case 'o': /* Override preference from command line */
1240 switch (prefs_set_pref(optarg)) {
1245 case PREFS_SET_SYNTAX_ERR:
1246 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1250 case PREFS_SET_NO_SUCH_PREF:
1251 case PREFS_SET_OBSOLETE:
1252 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1257 case 'q': /* Quiet */
1260 case 'r': /* Read capture file x */
1261 cf_name = g_strdup(optarg);
1263 case 'R': /* Read file filter */
1266 case 'P': /* Print packets even when writing to a file */
1267 print_packet_info = TRUE;
1269 case 'S': /* Set the line Separator to be printed between packets */
1270 separator = strdup(optarg);
1272 case 't': /* Time stamp type */
1273 if (strcmp(optarg, "r") == 0)
1274 timestamp_set_type(TS_RELATIVE);
1275 else if (strcmp(optarg, "a") == 0)
1276 timestamp_set_type(TS_ABSOLUTE);
1277 else if (strcmp(optarg, "ad") == 0)
1278 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1279 else if (strcmp(optarg, "d") == 0)
1280 timestamp_set_type(TS_DELTA);
1281 else if (strcmp(optarg, "dd") == 0)
1282 timestamp_set_type(TS_DELTA_DIS);
1283 else if (strcmp(optarg, "e") == 0)
1284 timestamp_set_type(TS_EPOCH);
1285 else if (strcmp(optarg, "u") == 0)
1286 timestamp_set_type(TS_UTC);
1287 else if (strcmp(optarg, "ud") == 0)
1288 timestamp_set_type(TS_UTC_WITH_DATE);
1290 cmdarg_err("Invalid time stamp type \"%s\"",
1292 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1293 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1297 case 'T': /* printing Type */
1298 if (strcmp(optarg, "text") == 0) {
1299 output_action = WRITE_TEXT;
1300 print_format = PR_FMT_TEXT;
1301 } else if (strcmp(optarg, "ps") == 0) {
1302 output_action = WRITE_TEXT;
1303 print_format = PR_FMT_PS;
1304 } else if (strcmp(optarg, "pdml") == 0) {
1305 output_action = WRITE_XML;
1307 } else if (strcmp(optarg, "psml") == 0) {
1308 output_action = WRITE_XML;
1310 } else if(strcmp(optarg, "fields") == 0) {
1311 output_action = WRITE_FIELDS;
1312 verbose = TRUE; /* Need full tree info */
1314 cmdarg_err("Invalid -T parameter.");
1315 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1319 case 'u': /* Seconds type */
1320 if (strcmp(optarg, "s") == 0)
1321 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1322 else if (strcmp(optarg, "hms") == 0)
1323 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1325 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1326 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1330 case 'v': /* Show version and exit */
1332 GString *comp_info_str;
1333 GString *runtime_info_str;
1334 /* Assemble the compile-time version information string */
1335 comp_info_str = g_string_new("Compiled ");
1336 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1338 /* Assemble the run-time version information string */
1339 runtime_info_str = g_string_new("Running ");
1340 get_runtime_version_info(runtime_info_str, NULL);
1341 show_version(comp_info_str, runtime_info_str);
1342 g_string_free(comp_info_str, TRUE);
1343 g_string_free(runtime_info_str, TRUE);
1347 case 'O': /* Only output these protocols */
1348 output_only = g_strdup(optarg);
1350 case 'V': /* Verbose */
1352 /* The user asked for a verbose output, so let's ensure they get it,
1353 * even if they're writing to a file.
1355 print_packet_info = TRUE;
1357 case 'x': /* Print packet data in hex (and ASCII) */
1359 /* The user asked for hex output, so let's ensure they get it,
1360 * even if they're writing to a file.
1362 print_packet_info = TRUE;
1367 /* We won't call the init function for the stat this soon
1368 as it would disallow MATE's fields (which are registered
1369 by the preferences set callback) from being used as
1370 part of a tap filter. Instead, we just add the argument
1371 to a list of stat arguments. */
1372 if (!process_stat_cmd_arg(optarg)) {
1373 cmdarg_err("invalid -z argument.");
1374 cmdarg_err_cont(" -z argument must be one of :");
1375 list_stat_cmd_args();
1380 case '?': /* Bad flag - print usage message */
1383 list_capture_types();
1393 /* If we specified output fields, but not the output field type... */
1394 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1395 cmdarg_err("Output fields were specified with \"-e\", "
1396 "but \"-Tfields\" was not specified.");
1398 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1399 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1400 "specified with \"-e\".");
1405 /* If no capture filter or read filter has been specified, and there are
1406 still command-line arguments, treat them as the tokens of a capture
1407 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1408 flag was specified. */
1409 if (optind < argc) {
1410 if (cf_name != NULL) {
1411 if (rfilter != NULL) {
1412 cmdarg_err("Read filters were specified both with \"-R\" "
1413 "and with additional command-line arguments.");
1416 rfilter = get_args_as_string(argc, argv, optind);
1419 if (global_capture_opts.default_options.cfilter) {
1420 cmdarg_err("A default capture filter was specified both with \"-f\""
1421 " and with additional command-line arguments.");
1424 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1425 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1426 if (interface_opts.cfilter == NULL) {
1427 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1428 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1429 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1431 cmdarg_err("A capture filter was specified both with \"-f\""
1432 " and with additional command-line arguments.");
1436 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1438 capture_option_specified = TRUE;
1444 if (!global_capture_opts.saving_to_file) {
1445 /* We're not saving the capture to a file; if "-q" wasn't specified,
1446 we should print packet information */
1448 print_packet_info = TRUE;
1450 /* We're saving to a file; if we're writing to the standard output.
1451 and we'll also be writing dissected packets to the standard
1452 output, reject the request. At best, we could redirect that
1453 to the standard error; we *can't* write both to the standard
1454 output and have either of them be useful. */
1455 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1456 cmdarg_err("You can't write both raw packet data and dissected packets"
1457 " to the standard output.");
1462 /* We're not saving the capture to a file; if "-q" wasn't specified,
1463 we should print packet information */
1465 print_packet_info = TRUE;
1468 #ifndef HAVE_LIBPCAP
1469 if (capture_option_specified)
1470 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1477 /* We don't support capture filters when reading from a capture file
1478 (the BPF compiler doesn't support all link-layer types that we
1479 support in capture files we read). */
1481 if (cf_name != NULL) {
1482 if (global_capture_opts.default_options.cfilter) {
1483 cmdarg_err("Only read filters, not capture filters, "
1484 "can be specified when reading a capture file.");
1491 if (output_action != WRITE_TEXT) {
1492 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1497 if (output_only != NULL) {
1501 cmdarg_err("-O requires -V");
1505 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1506 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1507 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1512 if (list_link_layer_types) {
1513 /* We're supposed to list the link-layer types for an interface;
1514 did the user also specify a capture file to be read? */
1516 /* Yes - that's bogus. */
1517 cmdarg_err("You can't specify -L and a capture file to be read.");
1520 /* No - did they specify a ring buffer option? */
1521 if (global_capture_opts.multi_files_on) {
1522 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1528 * "-r" was specified, so we're reading a capture file.
1529 * Capture options don't apply here.
1531 if (global_capture_opts.multi_files_on) {
1532 cmdarg_err("Multiple capture files requested, but "
1533 "a capture isn't being done.");
1536 if (global_capture_opts.has_file_duration) {
1537 cmdarg_err("Switching capture files after a time interval was specified, but "
1538 "a capture isn't being done.");
1541 if (global_capture_opts.has_ring_num_files) {
1542 cmdarg_err("A ring buffer of capture files was specified, but "
1543 "a capture isn't being done.");
1546 if (global_capture_opts.has_autostop_files) {
1547 cmdarg_err("A maximum number of capture files was specified, but "
1548 "a capture isn't being done.");
1552 /* Note: TShark now allows the restriction of a _read_ file by packet count
1553 * and byte count as well as a write file. Other autostop options remain valid
1554 * only for a write file.
1556 if (global_capture_opts.has_autostop_duration) {
1557 cmdarg_err("A maximum capture time was specified, but "
1558 "a capture isn't being done.");
1563 * "-r" wasn't specified, so we're doing a live capture.
1565 if (global_capture_opts.saving_to_file) {
1566 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1568 /* When capturing, we only support writing pcap or pcap-ng format. */
1569 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1570 cmdarg_err("Live captures can only be saved in libpcap format.");
1573 if (global_capture_opts.multi_files_on) {
1574 /* Multiple-file mode doesn't work under certain conditions:
1575 a) it doesn't work if you're writing to the standard output;
1576 b) it doesn't work if you're writing to a pipe;
1578 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1579 cmdarg_err("Multiple capture files requested, but "
1580 "the capture is being written to the standard output.");
1583 if (global_capture_opts.output_to_pipe) {
1584 cmdarg_err("Multiple capture files requested, but "
1585 "the capture file is a pipe.");
1588 if (!global_capture_opts.has_autostop_filesize &&
1589 !global_capture_opts.has_file_duration) {
1590 cmdarg_err("Multiple capture files requested, but "
1591 "no maximum capture file size or duration was specified.");
1595 /* Currently, we don't support read filters when capturing
1596 and saving the packets. */
1597 if (rfilter != NULL) {
1598 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1602 /* They didn't specify a "-w" flag, so we won't be saving to a
1603 capture file. Check for options that only make sense if
1604 we're saving to a file. */
1605 if (global_capture_opts.has_autostop_filesize) {
1606 cmdarg_err("Maximum capture file size specified, but "
1607 "capture isn't being saved to a file.");
1610 if (global_capture_opts.multi_files_on) {
1611 cmdarg_err("Multiple capture files requested, but "
1612 "the capture isn't being saved to a file.");
1621 /* Start windows sockets */
1622 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1625 /* Notify all registered modules that have had any of their preferences
1626 changed either from one of the preferences file or from the command
1627 line that their preferences have changed. */
1630 /* At this point MATE will have registered its field array so we can
1631 have a tap filter with one of MATE's late-registered fields as part
1632 of the filter. We can now process all the "-z" arguments. */
1633 start_requested_stats();
1636 /* We currently don't support taps, or printing dissected packets,
1637 if we're writing to a pipe. */
1638 if (global_capture_opts.saving_to_file &&
1639 global_capture_opts.output_to_pipe) {
1640 if (tap_listeners_require_dissection()) {
1641 cmdarg_err("Taps aren't supported when saving to a pipe.");
1644 if (print_packet_info) {
1645 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1651 /* disabled protocols as per configuration file */
1652 if (gdp_path == NULL && dp_path == NULL) {
1653 set_disabled_protos_list();
1656 /* Build the column format array */
1657 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1660 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1661 capture_opts_trim_ring_num_files(&global_capture_opts);
1664 if (rfilter != NULL) {
1665 if (!dfilter_compile(rfilter, &rfcode)) {
1666 cmdarg_err("%s", dfilter_error_msg);
1668 #ifdef HAVE_PCAP_OPEN_DEAD
1672 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1674 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1676 " Note: That display filter code looks like a valid capture filter;");
1678 " maybe you mixed them up?");
1687 cfile.rfcode = rfcode;
1689 if (print_packet_info) {
1690 /* If we're printing as text or PostScript, we have
1691 to create a print stream. */
1692 if (output_action == WRITE_TEXT) {
1693 switch (print_format) {
1696 print_stream = print_stream_text_stdio_new(stdout);
1700 print_stream = print_stream_ps_stdio_new(stdout);
1704 g_assert_not_reached();
1709 /* We have to dissect each packet if:
1711 we're printing information about each packet;
1713 we're using a read filter on the packets;
1715 we're using any taps that need dissection. */
1716 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1720 * We're reading a capture file.
1724 * Immediately relinquish any special privileges we have; we must not
1725 * be allowed to read any capture files the user running TShark
1728 relinquish_special_privs_perm();
1729 print_current_user();
1731 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1736 /* Set timestamp precision; there should arguably be a command-line
1737 option to let the user set this. */
1738 switch(wtap_file_tsprecision(cfile.wth)) {
1739 case(WTAP_FILE_TSPREC_SEC):
1740 timestamp_set_precision(TS_PREC_AUTO_SEC);
1742 case(WTAP_FILE_TSPREC_DSEC):
1743 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1745 case(WTAP_FILE_TSPREC_CSEC):
1746 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1748 case(WTAP_FILE_TSPREC_MSEC):
1749 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1751 case(WTAP_FILE_TSPREC_USEC):
1752 timestamp_set_precision(TS_PREC_AUTO_USEC);
1754 case(WTAP_FILE_TSPREC_NSEC):
1755 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1758 g_assert_not_reached();
1761 /* Process the packets in the file */
1764 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1765 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1766 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1768 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1771 CATCH(OutOfMemoryError) {
1775 "Sorry, but TShark has to terminate now!\n"
1777 "Some infos / workarounds can be found at:\n"
1778 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1783 /* We still dump out the results of taps, etc., as we might have
1784 read some packets; however, we exit with an error status. */
1788 /* No capture file specified, so we're supposed to do a live capture
1789 (or get a list of link-layer types for a live capture device);
1790 do we have support for live captures? */
1792 /* trim the interface name and exit if that failed */
1793 if (!capture_opts_trim_iface(&global_capture_opts,
1794 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1798 /* if requested, list the link layer types and exit */
1799 if (list_link_layer_types) {
1801 interface_options interface_opts;
1803 /* Get the list of link-layer types for the capture devices. */
1804 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1805 if_capabilities_t *caps;
1807 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1808 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1810 cmdarg_err("%s", err_str);
1814 if (caps->data_link_types == NULL) {
1815 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1818 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1819 free_if_capabilities(caps);
1824 if (print_packet_info) {
1825 if (!write_preamble(NULL)) {
1826 show_print_file_io_error(errno);
1829 } else if (!quiet) {
1831 * We're not printing information for each packet, and the user
1832 * didn't ask us not to print a count of packets as they arrive,
1833 * so print that count so the user knows that packets are arriving.
1835 * XXX - what if the user wants to do a live capture, doesn't want
1836 * to save it to a file, doesn't want information printed for each
1837 * packet, does want some "-z" statistic, and wants packet counts
1838 * so they know whether they're seeing any packets?
1840 print_packet_counts = TRUE;
1843 /* For now, assume libpcap gives microsecond precision. */
1844 timestamp_set_precision(TS_PREC_AUTO_USEC);
1847 * XXX - this returns FALSE if an error occurred, but it also
1848 * returns FALSE if the capture stops because a time limit
1849 * was reached (and possibly other limits), so we can't assume
1850 * it means an error.
1852 * The capture code is a bit twisty, so it doesn't appear to
1853 * be an easy fix. We just ignore the return value for now.
1854 * Instead, pass on the exit status from the capture child.
1857 exit_status = global_capture_opts.fork_child_status;
1859 if (print_packet_info) {
1860 if (!write_finale()) {
1862 show_print_file_io_error(err);
1866 /* No - complain. */
1867 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1874 if (cfile.frames != NULL) {
1875 free_frame_data_sequence(cfile.frames);
1876 cfile.frames = NULL;
1879 draw_tap_listeners(TRUE);
1880 funnel_dump_all_text_windows();
1883 output_fields_free(output_fields);
1884 output_fields = NULL;
1889 /*#define USE_BROKEN_G_MAIN_LOOP*/
1891 #ifdef USE_BROKEN_G_MAIN_LOOP
1894 gboolean loop_running = FALSE;
1896 guint32 packet_count = 0;
1899 /* XXX - move to the right position / file */
1900 /* read from a pipe (callback) */
1901 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1903 typedef struct pipe_input_tag {
1907 pipe_input_cb_t input_cb;
1908 guint pipe_input_id;
1910 GMutex *callback_running;
1914 static pipe_input_t pipe_input;
1917 /* The timer has expired, see if there's stuff to read from the pipe,
1918 if so, do the callback */
1920 pipe_timer_cb(gpointer data)
1924 gboolean result, result1;
1926 pipe_input_t *pipe_input_p = data;
1927 gint iterations = 0;
1929 g_mutex_lock (pipe_input_p->callback_running);
1931 /* try to read data from the pipe only 5 times, to avoid blocking */
1932 while(iterations < 5) {
1933 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1935 /* Oddly enough although Named pipes don't work on win9x,
1936 PeekNamedPipe does !!! */
1937 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1938 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1940 /* Get the child process exit status */
1941 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1944 /* If the Peek returned an error, or there are bytes to be read
1945 or the childwatcher thread has terminated then call the normal
1947 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1949 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1951 /* And call the real handler */
1952 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1953 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1954 /* pipe closed, return false so that the timer is stopped */
1955 g_mutex_unlock (pipe_input_p->callback_running);
1960 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1961 /* No data, stop now */
1968 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1970 g_mutex_unlock (pipe_input_p->callback_running);
1972 /* we didn't stopped the timer, so let it run */
1979 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1982 pipe_input.source = source;
1983 pipe_input.child_process = child_process;
1984 pipe_input.user_data = user_data;
1985 pipe_input.input_cb = input_cb;
1988 #if GLIB_CHECK_VERSION(2,31,0)
1989 pipe_input.callback_running = g_malloc(sizeof(GMutex));
1990 g_mutex_init(pipe_input.callback_running);
1992 pipe_input.callback_running = g_mutex_new();
1994 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1995 do this but that doesn't cover all win32 platforms. GTK can do
1996 this but doesn't seem to work over processes. Attempt to do
1997 something similar here, start a timer and check for data on every
1999 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2000 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2011 GString *str = g_string_new("");
2012 #ifdef USE_TSHARK_SELECT
2016 struct sigaction action, oldaction;
2020 * XXX - dropping privileges is still required, until code cleanup is done
2022 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2023 * when it's done, we don't need special privileges to run tshark at all,
2024 * therefore we don't need to drop these privileges
2025 * The only thing we might want to keep is a warning if tshark is run as root,
2026 * as it's no longer necessary and potentially dangerous.
2028 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2029 * We've opened the capture device, so we shouldn't need any special
2030 * privileges any more; relinquish those privileges.
2032 * XXX - if we have saved set-user-ID support, we should give up those
2033 * privileges immediately, and then reclaim them long enough to get
2034 * a list of network interfaces and to open one, and then give them
2035 * up again, so that stuff we do while processing the argument list,
2036 * reading the user's preferences, loading and starting plugins
2037 * (especially *user* plugins), etc. is done with the user's privileges,
2038 * not special privileges.
2040 relinquish_special_privs_perm();
2041 print_current_user();
2043 /* Cleanup all data structures used for dissection. */
2044 cleanup_dissection();
2045 /* Initialize all data structures used for dissection. */
2049 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2050 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2052 /* Catch SIGINT and SIGTERM and, if we get either of them,
2053 clean up and exit. If SIGHUP isn't being ignored, catch
2054 it too and, if we get it, clean up and exit.
2056 We restart any read that was in progress, so that it doesn't
2057 disrupt reading from the sync pipe. The signal handler tells
2058 the capture child to finish; it will report that it finished,
2059 or will exit abnormally, so we'll stop reading from the sync
2060 pipe, pick up the exit status, and quit. */
2061 action.sa_handler = capture_cleanup;
2062 action.sa_flags = SA_RESTART;
2063 sigemptyset(&action.sa_mask);
2064 sigaction(SIGTERM, &action, NULL);
2065 sigaction(SIGINT, &action, NULL);
2066 sigaction(SIGHUP, NULL, &oldaction);
2067 if (oldaction.sa_handler == SIG_DFL)
2068 sigaction(SIGHUP, &action, NULL);
2071 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2072 quiet mode, report the number of packets we've captured.
2074 Again, restart any read that was in progress, so that it doesn't
2075 disrupt reading from the sync pipe. */
2076 action.sa_handler = report_counts_siginfo;
2077 action.sa_flags = SA_RESTART;
2078 sigemptyset(&action.sa_mask);
2079 sigaction(SIGINFO, &action, NULL);
2080 #endif /* SIGINFO */
2083 global_capture_opts.state = CAPTURE_PREPARING;
2085 /* Let the user know which interfaces were chosen. */
2086 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2087 interface_options interface_opts;
2089 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2090 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2091 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2092 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2095 if (global_capture_opts.ifaces->len < 2) {
2097 if (global_capture_opts.ifaces->len < 4) {
2099 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2100 interface_options interface_opts;
2102 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2104 if (global_capture_opts.ifaces->len > 2) {
2105 g_string_append_printf(str, ",");
2107 g_string_append_printf(str, " ");
2108 if (i == global_capture_opts.ifaces->len - 1) {
2109 g_string_append_printf(str, "and ");
2112 g_string_append_printf(str, "%s", interface_opts.descr);
2115 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2117 fprintf(stdout, "Capturing on %s\n", str->str);
2118 g_string_free(str, TRUE);
2120 ret = sync_pipe_start(&global_capture_opts);
2125 /* the actual capture loop
2127 * XXX - glib doesn't seem to provide any event based loop handling.
2129 * XXX - for whatever reason,
2130 * calling g_main_loop_new() ends up in 100% cpu load.
2132 * But that doesn't matter: in UNIX we can use select() to find an input
2133 * source with something to do.
2135 * But that doesn't matter because we're in a CLI (that doesn't need to
2136 * update a GUI or something at the same time) so it's OK if we block
2137 * trying to read from the pipe.
2139 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2140 * wrong (but I leave it there in case I am...).
2143 #ifdef USE_TSHARK_SELECT
2145 FD_SET(pipe_input.source, &readfds);
2148 loop_running = TRUE;
2152 while (loop_running)
2154 #ifdef USE_TSHARK_SELECT
2155 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2161 } else if (ret == 1) {
2163 /* Call the real handler */
2164 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2165 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2168 #ifdef USE_TSHARK_SELECT
2173 CATCH(OutOfMemoryError) {
2177 "Sorry, but TShark has to terminate now!\n"
2179 "Some infos / workarounds can be found at:\n"
2180 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2188 /* XXX - move the call to main_window_update() out of capture_sync.c */
2189 /* dummy for capture_sync.c to make linker happy */
2190 void main_window_update(void)
2194 /* capture child detected an error */
2196 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2198 cmdarg_err("%s", error_msg);
2199 cmdarg_err_cont("%s", secondary_error_msg);
2203 /* capture child detected an capture filter related error */
2205 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2207 dfilter_t *rfcode = NULL;
2208 interface_options interface_opts;
2210 g_assert(i < capture_opts->ifaces->len);
2211 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2213 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2215 "Invalid capture filter \"%s\" for interface %s!\n"
2217 "That string looks like a valid display filter; however, it isn't a valid\n"
2218 "capture filter (%s).\n"
2220 "Note that display filters and capture filters don't have the same syntax,\n"
2221 "so you can't use most display filter expressions as capture filters.\n"
2223 "See the User's Guide for a description of the capture filter syntax.",
2224 interface_opts.cfilter, interface_opts.descr, error_message);
2225 dfilter_free(rfcode);
2228 "Invalid capture filter \"%s\" for interface %s!\n"
2230 "That string isn't a valid capture filter (%s).\n"
2231 "See the User's Guide for a description of the capture filter syntax.",
2232 interface_opts.cfilter, interface_opts.descr, error_message);
2237 /* capture child tells us we have a new (or the first) capture file */
2239 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2241 gboolean is_tempfile;
2244 if(capture_opts->state == CAPTURE_PREPARING) {
2245 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2247 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2249 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2251 /* free the old filename */
2252 if (capture_opts->save_file != NULL) {
2254 /* we start a new capture file, close the old one (if we had one before) */
2255 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2256 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2257 wtap_close(((capture_file *) capture_opts->cf)->wth);
2259 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2262 g_free(capture_opts->save_file);
2263 is_tempfile = FALSE;
2265 /* we didn't had a save_file before, must be a tempfile */
2269 /* save the new filename */
2270 capture_opts->save_file = g_strdup(new_file);
2272 /* if we are in real-time mode, open the new file now */
2274 /* Attempt to open the capture file and set up to read from it. */
2275 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2279 /* Don't unlink (delete) the save file - leave it around,
2280 for debugging purposes. */
2281 g_free(capture_opts->save_file);
2282 capture_opts->save_file = NULL;
2287 capture_opts->state = CAPTURE_RUNNING;
2293 /* capture child tells us we have new packets to read */
2295 capture_input_new_packets(capture_options *capture_opts, int to_read)
2301 capture_file *cf = capture_opts->cf;
2302 gboolean filtering_tap_listeners;
2307 * Prevent a SIGINFO handler from writing to the standard error while
2308 * we're doing so or writing to the standard output; instead, have it
2309 * just set a flag telling us to print that information when we're done.
2312 #endif /* SIGINFO */
2314 /* Do we have any tap listeners with filters? */
2315 filtering_tap_listeners = have_filtering_tap_listeners();
2317 /* Get the union of the flags for all tap listeners. */
2318 tap_flags = union_of_tap_listener_flags();
2321 while (to_read-- && cf->wth) {
2322 wtap_cleareof(cf->wth);
2323 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2325 /* read from file failed, tell the capture child to stop */
2326 sync_pipe_stop(capture_opts);
2327 wtap_close(cf->wth);
2330 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2331 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2332 filtering_tap_listeners, tap_flags);
2335 /* packet successfully read and gone through the "Read Filter" */
2341 * Dumpcap's doing all the work; we're not doing any dissection.
2342 * Count all the packets it wrote.
2344 packet_count += to_read;
2347 if (print_packet_counts) {
2348 /* We're printing packet counts. */
2349 if (packet_count != 0) {
2350 fprintf(stderr, "\r%u ", packet_count);
2351 /* stderr could be line buffered */
2358 * Allow SIGINFO handlers to write.
2363 * If a SIGINFO handler asked us to write out capture counts, do so.
2367 #endif /* SIGINFO */
2373 if (!print_packet_counts) {
2374 /* Report the count only if we aren't printing a packet count
2375 as packets arrive. */
2376 fprintf(stdout, "%u packet%s captured\n", packet_count,
2377 plurality(packet_count, "", "s"));
2380 infoprint = FALSE; /* we just reported it */
2381 #endif /* SIGINFO */
2386 report_counts_siginfo(int signum _U_)
2388 int sav_errno = errno;
2389 /* If we've been told to delay printing, just set a flag asking
2390 that we print counts (if we're supposed to), otherwise print
2391 the count of packets captured (if we're supposed to). */
2398 #endif /* SIGINFO */
2401 /* capture child detected any packet drops? */
2403 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2405 if (print_packet_counts) {
2406 /* We're printing packet counts to stderr.
2407 Send a newline so that we move to the line after the packet count. */
2408 fprintf(stderr, "\n");
2412 /* We're printing packet counts to stderr.
2413 Send a newline so that we move to the line after the packet count. */
2414 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2420 * Capture child closed its side of the pipe, report any error and
2421 * do the required cleanup.
2424 capture_input_closed(capture_options *capture_opts, gchar *msg)
2427 fprintf(stderr, "tshark: %s\n", msg);
2431 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2432 wtap_close(((capture_file *) capture_opts->cf)->wth);
2433 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2434 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2437 #ifdef USE_BROKEN_G_MAIN_LOOP
2438 /*g_main_loop_quit(loop);*/
2441 loop_running = FALSE;
2450 capture_cleanup(DWORD ctrltype _U_)
2452 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2453 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2454 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2455 like SIGTERM at least when the machine's shutting down.
2457 For now, we handle them all as indications that we should clean up
2458 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2461 We must return TRUE so that no other handler - such as one that would
2462 terminate the process - gets called.
2464 XXX - for some reason, typing ^C to TShark, if you run this in
2465 a Cygwin console window in at least some versions of Cygwin,
2466 causes TShark to terminate immediately; this routine gets
2467 called, but the main loop doesn't get a chance to run and
2468 exit cleanly, at least if this is compiled with Microsoft Visual
2469 C++ (i.e., it's a property of the Cygwin console window or Bash;
2470 it happens if TShark is not built with Cygwin - for all I know,
2471 building it with Cygwin may make the problem go away). */
2473 /* tell the capture child to stop */
2474 sync_pipe_stop(&global_capture_opts);
2476 /* don't stop our own loop already here, otherwise status messages and
2477 * cleanup wouldn't be done properly. The child will indicate the stop of
2478 * everything by calling capture_input_closed() later */
2484 capture_cleanup(int signum _U_)
2486 /* tell the capture child to stop */
2487 sync_pipe_stop(&global_capture_opts);
2489 /* don't stop our own loop already here, otherwise status messages and
2490 * cleanup wouldn't be done properly. The child will indicate the stop of
2491 * everything by calling capture_input_closed() later */
2494 #endif /* HAVE_LIBPCAP */
2497 process_packet_first_pass(capture_file *cf,
2498 gint64 offset, const struct wtap_pkthdr *whdr,
2499 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2506 /* The frame number of this packet is one more than the count of
2507 frames in this packet. */
2508 framenum = cf->count + 1;
2510 /* If we're not running a display filter and we're not printing any
2511 packet information, we don't need to do a dissection. This means
2512 that all packets can be marked as 'passed'. */
2515 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2517 /* If we're going to print packet information, or we're going to
2518 run a read filter, or we're going to process taps, set up to
2519 do a dissection and do so. */
2520 if (do_dissection) {
2521 if (gbl_resolv_flags)
2522 /* Grab any resolved addresses */
2523 host_name_lookup_process(NULL);
2525 /* The protocol tree will be "visible", i.e., printed, only if we're
2526 printing packet details, which is true if we're printing stuff
2527 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2529 epan_dissect_init(&edt, FALSE, FALSE);
2531 /* If we're running a read filter, prime the epan_dissect_t with that
2534 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2536 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2537 &first_ts, &prev_dis_ts, &prev_cap_ts);
2539 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2541 /* Run the read filter if we have one. */
2543 passed = dfilter_apply_edt(cf->rfcode, &edt);
2547 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2548 frame_data_sequence_add(cf->frames, &fdlocal);
2553 epan_dissect_cleanup(&edt);
2559 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2560 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2561 gboolean filtering_tap_listeners, guint tap_flags)
2563 gboolean create_proto_tree;
2568 /* If we're not running a display filter and we're not printing any
2569 packet information, we don't need to do a dissection. This means
2570 that all packets can be marked as 'passed'. */
2573 /* If we're going to print packet information, or we're going to
2574 run a read filter, or we're going to process taps, set up to
2575 do a dissection and do so. */
2576 if (do_dissection) {
2577 if (gbl_resolv_flags)
2578 /* Grab any resolved addresses */
2579 host_name_lookup_process(NULL);
2581 if (cf->rfcode || verbose || filtering_tap_listeners ||
2582 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2583 create_proto_tree = TRUE;
2585 create_proto_tree = FALSE;
2587 /* The protocol tree will be "visible", i.e., printed, only if we're
2588 printing packet details, which is true if we're printing stuff
2589 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2591 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2593 /* If we're running a read filter, prime the epan_dissect_t with that
2596 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2598 col_custom_prime_edt(&edt, &cf->cinfo);
2600 tap_queue_init(&edt);
2602 /* We only need the columns if either
2604 1) some tap needs the columns
2608 2) we're printing packet info but we're *not* verbose; in verbose
2609 mode, we print the protocol tree, not the protocol summary. */
2610 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2615 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2617 tap_push_tapped_queue(&edt);
2619 /* Run the read filter if we have one. */
2621 passed = dfilter_apply_edt(cf->rfcode, &edt);
2625 /* Process this packet. */
2626 if (print_packet_info) {
2627 /* We're printing packet information; print the information for
2630 print_packet(cf, &edt);
2632 print_packet(cf, NULL);
2634 /* The ANSI C standard does not appear to *require* that a line-buffered
2635 stream be flushed to the host environment whenever a newline is
2636 written, it just says that, on such a stream, characters "are
2637 intended to be transmitted to or from the host environment as a
2638 block when a new-line character is encountered".
2640 The Visual C++ 6.0 C implementation doesn't do what is intended;
2641 even if you set a stream to be line-buffered, it still doesn't
2642 flush the buffer at the end of every line.
2644 So, if the "-l" flag was specified, we flush the standard output
2645 at the end of a packet. This will do the right thing if we're
2646 printing packet summary lines, and, as we print the entire protocol
2647 tree for a single packet without waiting for anything to happen,
2648 it should be as good as line-buffered mode if we're printing
2649 protocol trees. (The whole reason for the "-l" flag in either
2650 tcpdump or TShark is to allow the output of a live capture to
2651 be piped to a program or script and to have that script see the
2652 information for the packet as soon as it's printed, rather than
2653 having to wait until a standard I/O buffer fills up. */
2657 if (ferror(stdout)) {
2658 show_print_file_io_error(errno);
2664 if (do_dissection) {
2665 epan_dissect_cleanup(&edt);
2671 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2672 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2675 int snapshot_length;
2679 gchar *err_info = NULL;
2681 char *save_file_string = NULL;
2682 gboolean filtering_tap_listeners;
2685 #ifdef PCAP_NG_DEFAULT
2686 linktype = WTAP_ENCAP_PER_PACKET;
2688 linktype = wtap_file_encap(cf->wth);
2690 if (save_file != NULL) {
2691 /* Get a string that describes what we're writing to */
2692 save_file_string = output_file_description(save_file);
2694 /* Set up to write to the capture file. */
2695 snapshot_length = wtap_snapshot_length(cf->wth);
2696 if (snapshot_length == 0) {
2697 /* Snapshot length of input file not known. */
2698 snapshot_length = WTAP_MAX_PACKET_SIZE;
2700 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2701 FALSE /* compressed */, &err);
2704 /* We couldn't set up to write to the capture file. */
2707 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2708 cmdarg_err("Capture files can't be written in that format.");
2711 case WTAP_ERR_UNSUPPORTED_ENCAP:
2712 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2713 cmdarg_err("The capture file being read can't be written as a "
2714 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2717 case WTAP_ERR_CANT_OPEN:
2718 cmdarg_err("The %s couldn't be created for some "
2719 "unknown reason.", save_file_string);
2722 case WTAP_ERR_SHORT_WRITE:
2723 cmdarg_err("A full header couldn't be written to the %s.",
2728 cmdarg_err("The %s could not be created: %s.", save_file_string,
2729 wtap_strerror(err));
2735 if (print_packet_info) {
2736 if (!write_preamble(cf)) {
2738 show_print_file_io_error(err);
2745 if (pdh && out_file_name_res) {
2746 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2747 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2748 wtap_file_type_short_string(out_file_type));
2752 /* Do we have any tap listeners with filters? */
2753 filtering_tap_listeners = have_filtering_tap_listeners();
2755 /* Get the union of the flags for all tap listeners. */
2756 tap_flags = union_of_tap_listener_flags();
2758 if (perform_two_pass_analysis) {
2760 int old_max_packet_count = max_packet_count;
2762 /* Allocate a frame_data_sequence for all the frames. */
2763 cf->frames = new_frame_data_sequence();
2765 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2766 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2767 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2768 /* Stop reading if we have the maximum number of packets;
2769 * When the -c option has not been used, max_packet_count
2770 * starts at 0, which practically means, never stop reading.
2771 * (unless we roll over max_packet_count ?)
2773 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2774 err = 0; /* This is not an error */
2780 /* Close the sequential I/O side, to free up memory it requires. */
2781 wtap_sequential_close(cf->wth);
2783 /* Allow the protocol dissectors to free up memory that they
2784 * don't need after the sequential run-through of the packets. */
2785 postseq_cleanup_all_protocols();
2787 max_packet_count = old_max_packet_count;
2789 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2790 fdata = frame_data_sequence_find(cf->frames, framenum);
2791 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2792 cf->pd, fdata->cap_len, &err, &err_info)) {
2793 if (process_packet_second_pass(cf, fdata,
2794 &cf->pseudo_header, cf->pd,
2795 filtering_tap_listeners, tap_flags)) {
2796 /* Either there's no read filtering or this packet passed the
2797 filter, so, if we're writing to a capture file, write
2800 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2801 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2803 /* Error writing to a capture file */
2806 case WTAP_ERR_UNSUPPORTED_ENCAP:
2808 * This is a problem with the particular frame we're writing;
2809 * note that, and give the frame number.
2811 * XXX - framenum is not necessarily the frame number in
2812 * the input file if there was a read filter.
2815 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2816 framenum, cf->filename,
2817 wtap_file_type_short_string(out_file_type));
2821 show_capture_file_io_error(save_file, err, FALSE);
2824 wtap_dump_close(pdh, &err);
2828 /* Stop reading if we have the maximum number of packets;
2829 * When the -c option has not been used, max_packet_count
2830 * starts at 0, which practically means, never stop reading.
2831 * (unless we roll over max_packet_count ?)
2833 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2834 err = 0; /* This is not an error */
2843 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2846 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2847 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2848 filtering_tap_listeners, tap_flags)) {
2849 /* Either there's no read filtering or this packet passed the
2850 filter, so, if we're writing to a capture file, write
2853 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2854 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2856 /* Error writing to a capture file */
2859 case WTAP_ERR_UNSUPPORTED_ENCAP:
2861 * This is a problem with the particular frame we're writing;
2862 * note that, and give the frame number.
2865 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2866 framenum, cf->filename,
2867 wtap_file_type_short_string(out_file_type));
2871 show_capture_file_io_error(save_file, err, FALSE);
2874 wtap_dump_close(pdh, &err);
2878 /* Stop reading if we have the maximum number of packets;
2879 * When the -c option has not been used, max_packet_count
2880 * starts at 0, which practically means, never stop reading.
2881 * (unless we roll over max_packet_count ?)
2883 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2884 err = 0; /* This is not an error */
2893 * Print a message noting that the read failed somewhere along the line.
2895 * If we're printing packet data, and the standard output and error are
2896 * going to the same place, flush the standard output, so everything
2897 * buffered up is written, and then print a newline to the standard error
2898 * before printing the error message, to separate it from the packet
2899 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2900 * the _fstat() documentation at Microsoft doesn't indicate whether
2901 * st_ino is even supported.)
2904 if (print_packet_info) {
2905 struct stat stat_stdout, stat_stderr;
2907 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2908 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2909 stat_stdout.st_ino == stat_stderr.st_ino) {
2911 fprintf(stderr, "\n");
2918 case WTAP_ERR_UNSUPPORTED_ENCAP:
2919 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2920 cf->filename, err_info);
2924 case WTAP_ERR_CANT_READ:
2925 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2929 case WTAP_ERR_SHORT_READ:
2930 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2934 case WTAP_ERR_BAD_FILE:
2935 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2936 cf->filename, err_info);
2940 case WTAP_ERR_DECOMPRESS:
2941 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2942 "(%s)", cf->filename, err_info);
2946 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2947 cf->filename, wtap_strerror(err));
2950 if (save_file != NULL) {
2951 /* Now close the capture file. */
2952 if (!wtap_dump_close(pdh, &err))
2953 show_capture_file_io_error(save_file, err, TRUE);
2956 if (save_file != NULL) {
2957 /* Now close the capture file. */
2958 if (!wtap_dump_close(pdh, &err))
2959 show_capture_file_io_error(save_file, err, TRUE);
2961 if (print_packet_info) {
2962 if (!write_finale()) {
2964 show_print_file_io_error(err);
2971 wtap_close(cf->wth);
2974 g_free(save_file_string);
2980 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2981 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2982 gboolean filtering_tap_listeners, guint tap_flags)
2985 gboolean create_proto_tree;
2990 /* Count this packet. */
2993 /* If we're not running a display filter and we're not printing any
2994 packet information, we don't need to do a dissection. This means
2995 that all packets can be marked as 'passed'. */
2998 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3000 /* If we're going to print packet information, or we're going to
3001 run a read filter, or we're going to process taps, set up to
3002 do a dissection and do so. */
3003 if (do_dissection) {
3004 if (print_packet_info && gbl_resolv_flags)
3005 /* Grab any resolved addresses */
3006 host_name_lookup_process(NULL);
3008 if (cf->rfcode || verbose || filtering_tap_listeners ||
3009 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3010 create_proto_tree = TRUE;
3012 create_proto_tree = FALSE;
3014 /* The protocol tree will be "visible", i.e., printed, only if we're
3015 printing packet details, which is true if we're printing stuff
3016 ("print_packet_info" is true) and we're in verbose mode ("verbose"
3018 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
3020 /* If we're running a read filter, prime the epan_dissect_t with that
3023 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3025 col_custom_prime_edt(&edt, &cf->cinfo);
3027 tap_queue_init(&edt);
3029 /* We only need the columns if either
3031 1) some tap needs the columns
3035 2) we're printing packet info but we're *not* verbose; in verbose
3036 mode, we print the protocol tree, not the protocol summary. */
3037 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
3042 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3043 &first_ts, &prev_dis_ts, &prev_cap_ts);
3045 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
3047 tap_push_tapped_queue(&edt);
3049 /* Run the read filter if we have one. */
3051 passed = dfilter_apply_edt(cf->rfcode, &edt);
3055 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
3057 /* Process this packet. */
3058 if (print_packet_info) {
3059 /* We're printing packet information; print the information for
3062 print_packet(cf, &edt);
3064 print_packet(cf, NULL);
3066 /* The ANSI C standard does not appear to *require* that a line-buffered
3067 stream be flushed to the host environment whenever a newline is
3068 written, it just says that, on such a stream, characters "are
3069 intended to be transmitted to or from the host environment as a
3070 block when a new-line character is encountered".
3072 The Visual C++ 6.0 C implementation doesn't do what is intended;
3073 even if you set a stream to be line-buffered, it still doesn't
3074 flush the buffer at the end of every line.
3076 So, if the "-l" flag was specified, we flush the standard output
3077 at the end of a packet. This will do the right thing if we're
3078 printing packet summary lines, and, as we print the entire protocol
3079 tree for a single packet without waiting for anything to happen,
3080 it should be as good as line-buffered mode if we're printing
3081 protocol trees. (The whole reason for the "-l" flag in either
3082 tcpdump or TShark is to allow the output of a live capture to
3083 be piped to a program or script and to have that script see the
3084 information for the packet as soon as it's printed, rather than
3085 having to wait until a standard I/O buffer fills up. */
3089 if (ferror(stdout)) {
3090 show_print_file_io_error(errno);
3096 if (do_dissection) {
3097 epan_dissect_cleanup(&edt);
3098 frame_data_cleanup(&fdata);
3104 write_preamble(capture_file *cf)
3106 switch (output_action) {
3109 return print_preamble(print_stream, cf ? cf->filename : NULL);
3113 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3115 write_psml_preamble(stdout);
3116 return !ferror(stdout);
3119 write_fields_preamble(output_fields, stdout);
3120 return !ferror(stdout);
3123 g_assert_not_reached();
3129 get_line_buf(size_t len)
3131 static char *line_bufp = NULL;
3132 static size_t line_buf_len = 256;
3133 size_t new_line_buf_len;
3135 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3136 new_line_buf_len *= 2)
3138 if (line_bufp == NULL) {
3139 line_buf_len = new_line_buf_len;
3140 line_bufp = g_malloc(line_buf_len + 1);
3142 if (new_line_buf_len > line_buf_len) {
3143 line_buf_len = new_line_buf_len;
3144 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3151 print_columns(capture_file *cf)
3158 line_bufp = get_line_buf(256);
3161 for (i = 0; i < cf->cinfo.num_cols; i++) {
3162 /* Skip columns not marked as visible. */
3163 if (!get_column_visible(i))
3165 switch (cf->cinfo.col_fmt[i]) {
3169 * Don't print this if we're doing a live capture from a network
3170 * interface - if we're doing a live capture, you won't be
3171 * able to look at the capture in the future (it's not being
3172 * saved anywhere), so the frame numbers are unlikely to be
3175 * (XXX - it might be nice to be able to save and print at
3176 * the same time, sort of like an "Update list of packets
3177 * in real time" capture in Wireshark.)
3179 if (global_capture_opts.ifaces->len > 0)
3182 column_len = strlen(cf->cinfo.col_data[i]);
3185 line_bufp = get_line_buf(buf_offset + column_len);
3186 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3192 case COL_ABS_DATE_TIME:
3194 case COL_UTC_DATE_TIME: /* XXX - wider */
3195 column_len = strlen(cf->cinfo.col_data[i]);
3196 if (column_len < 10)
3198 line_bufp = get_line_buf(buf_offset + column_len);
3199 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3205 case COL_DEF_DL_SRC:
3206 case COL_RES_DL_SRC:
3207 case COL_UNRES_DL_SRC:
3208 case COL_DEF_NET_SRC:
3209 case COL_RES_NET_SRC:
3210 case COL_UNRES_NET_SRC:
3211 column_len = strlen(cf->cinfo.col_data[i]);
3212 if (column_len < 12)
3214 line_bufp = get_line_buf(buf_offset + column_len);
3215 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3221 case COL_DEF_DL_DST:
3222 case COL_RES_DL_DST:
3223 case COL_UNRES_DL_DST:
3224 case COL_DEF_NET_DST:
3225 case COL_RES_NET_DST:
3226 case COL_UNRES_NET_DST:
3227 column_len = strlen(cf->cinfo.col_data[i]);
3228 if (column_len < 12)
3230 line_bufp = get_line_buf(buf_offset + column_len);
3231 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3235 column_len = strlen(cf->cinfo.col_data[i]);
3236 line_bufp = get_line_buf(buf_offset + column_len);
3237 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3240 buf_offset += column_len;
3241 if (i != cf->cinfo.num_cols - 1) {
3243 * This isn't the last column, so we need to print a
3244 * separator between this column and the next.
3246 * If we printed a network source and are printing a
3247 * network destination of the same type next, separate
3248 * them with " -> "; if we printed a network destination
3249 * and are printing a network source of the same type
3250 * next, separate them with " <- "; otherwise separate them
3253 * We add enough space to the buffer for " <- " or " -> ",
3254 * even if we're only adding " ".
3256 line_bufp = get_line_buf(buf_offset + 4);
3257 switch (cf->cinfo.col_fmt[i]) {
3262 switch (cf->cinfo.col_fmt[i + 1]) {
3267 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3272 g_strlcat(line_bufp + buf_offset, " ", 5);
3278 case COL_DEF_DL_SRC:
3279 case COL_RES_DL_SRC:
3280 case COL_UNRES_DL_SRC:
3281 switch (cf->cinfo.col_fmt[i + 1]) {
3283 case COL_DEF_DL_DST:
3284 case COL_RES_DL_DST:
3285 case COL_UNRES_DL_DST:
3286 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3291 g_strlcat(line_bufp + buf_offset, " ", 5);
3297 case COL_DEF_NET_SRC:
3298 case COL_RES_NET_SRC:
3299 case COL_UNRES_NET_SRC:
3300 switch (cf->cinfo.col_fmt[i + 1]) {
3302 case COL_DEF_NET_DST:
3303 case COL_RES_NET_DST:
3304 case COL_UNRES_NET_DST:
3305 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3310 g_strlcat(line_bufp + buf_offset, " ", 5);
3319 switch (cf->cinfo.col_fmt[i + 1]) {
3324 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3329 g_strlcat(line_bufp + buf_offset, " ", 5);
3335 case COL_DEF_DL_DST:
3336 case COL_RES_DL_DST:
3337 case COL_UNRES_DL_DST:
3338 switch (cf->cinfo.col_fmt[i + 1]) {
3340 case COL_DEF_DL_SRC:
3341 case COL_RES_DL_SRC:
3342 case COL_UNRES_DL_SRC:
3343 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3348 g_strlcat(line_bufp + buf_offset, " ", 5);
3354 case COL_DEF_NET_DST:
3355 case COL_RES_NET_DST:
3356 case COL_UNRES_NET_DST:
3357 switch (cf->cinfo.col_fmt[i + 1]) {
3359 case COL_DEF_NET_SRC:
3360 case COL_RES_NET_SRC:
3361 case COL_UNRES_NET_SRC:
3362 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3367 g_strlcat(line_bufp + buf_offset, " ", 5);
3374 g_strlcat(line_bufp + buf_offset, " ", 5);
3380 return print_line(print_stream, 0, line_bufp);
3384 print_packet(capture_file *cf, epan_dissect_t *edt)
3386 print_args_t print_args;
3389 /* Print the information in the protocol tree. */
3390 switch (output_action) {
3393 print_args.to_file = TRUE;
3394 print_args.format = print_format;
3395 print_args.print_summary = !verbose;
3396 print_args.print_hex = verbose && print_hex;
3397 print_args.print_formfeed = FALSE;
3398 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3400 /* init the packet range */
3401 packet_range_init(&print_args.range);
3403 if (!proto_tree_print(&print_args, edt, print_stream))
3406 /* "print_hex_data()" will put out a leading blank line, as well
3407 as a trailing one; print one here, to separate the packets,
3408 only if "print_hex_data()" won't be called. */
3409 if (!print_line(print_stream, 0, separator))
3415 proto_tree_write_pdml(edt, stdout);
3417 return !ferror(stdout);
3419 proto_tree_write_fields(output_fields, edt, stdout);
3421 return !ferror(stdout);
3424 /* Just fill in the columns. */
3425 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3427 /* Now print them. */
3428 switch (output_action) {
3431 if (!print_columns(cf))
3436 proto_tree_write_psml(edt, stdout);
3437 return !ferror(stdout);
3438 case WRITE_FIELDS: /*No non-verbose "fields" format */
3439 g_assert_not_reached();
3444 if (!print_hex_data(print_stream, edt))
3446 if (!print_line(print_stream, 0, ""))
3455 switch (output_action) {
3458 return print_finale(print_stream);
3462 write_pdml_finale(stdout);
3464 write_psml_finale(stdout);
3465 return !ferror(stdout);
3468 write_fields_finale(output_fields, stdout);
3469 return !ferror(stdout);
3472 g_assert_not_reached();
3478 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3482 char err_msg[2048+1];
3484 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3488 /* The open succeeded. Fill in the information for this file. */
3490 /* Cleanup all data structures used for dissection. */
3491 cleanup_dissection();
3492 /* Initialize all data structures used for dissection. */
3496 cf->f_datalen = 0; /* not used, but set it anyway */
3498 /* Set the file name because we need it to set the follow stream filter.
3499 XXX - is that still true? We need it for other reasons, though,
3501 cf->filename = g_strdup(fname);
3503 /* Indicate whether it's a permanent or temporary file. */
3504 cf->is_tempfile = is_tempfile;
3506 /* If it's a temporary capture buffer file, mark it as not saved. */
3507 cf->user_saved = !is_tempfile;
3509 cf->cd_t = wtap_file_type(cf->wth);
3511 cf->drops_known = FALSE;
3513 cf->snap = wtap_snapshot_length(cf->wth);
3514 if (cf->snap == 0) {
3515 /* Snapshot length not known. */
3516 cf->has_snap = FALSE;
3517 cf->snap = WTAP_MAX_PACKET_SIZE;
3519 cf->has_snap = TRUE;
3520 nstime_set_zero(&cf->elapsed_time);
3521 nstime_set_unset(&first_ts);
3522 nstime_set_unset(&prev_dis_ts);
3523 nstime_set_unset(&prev_cap_ts);
3525 cf->state = FILE_READ_IN_PROGRESS;
3527 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3528 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3533 g_snprintf(err_msg, sizeof err_msg,
3534 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3535 cmdarg_err("%s", err_msg);
3540 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3542 char *save_file_string;
3544 save_file_string = output_file_description(fname);
3549 cmdarg_err("Not all the packets could be written to the %s because there is "
3550 "no space left on the file system.",
3556 cmdarg_err("Not all the packets could be written to the %s because you are "
3557 "too close to, or over your disk quota.",
3562 case WTAP_ERR_CANT_CLOSE:
3563 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3567 case WTAP_ERR_SHORT_WRITE:
3568 cmdarg_err("Not all the packets could be written to the %s.",
3574 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3575 wtap_strerror(err));
3577 cmdarg_err("An error occurred while writing to the %s: %s.",
3578 save_file_string, wtap_strerror(err));
3582 g_free(save_file_string);
3586 show_print_file_io_error(int err)
3591 cmdarg_err("Not all the packets could be printed because there is "
3592 "no space left on the file system.");
3597 cmdarg_err("Not all the packets could be printed because you are "
3598 "too close to, or over your disk quota.");
3603 cmdarg_err("An error occurred while printing packets: %s.",
3610 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3614 static char errmsg_errno[1024+1];
3617 /* Wiretap error. */
3620 case WTAP_ERR_NOT_REGULAR_FILE:
3621 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3624 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3625 /* Seen only when opening a capture file for reading. */
3626 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3629 case WTAP_ERR_UNSUPPORTED:
3630 /* Seen only when opening a capture file for reading. */
3631 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3632 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3635 errmsg = errmsg_errno;
3638 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3639 /* Seen only when opening a capture file for writing. */
3640 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3641 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3642 "written to a pipe.", wtap_file_type_short_string(file_type));
3643 errmsg = errmsg_errno;
3646 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3647 /* Seen only when opening a capture file for writing. */
3648 errmsg = "TShark doesn't support writing capture files in that format.";
3651 case WTAP_ERR_UNSUPPORTED_ENCAP:
3653 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3654 "TShark can't save this capture as a \"%s\" file.",
3655 wtap_file_type_short_string(file_type));
3657 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3658 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3662 errmsg = errmsg_errno;
3665 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3667 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3668 "TShark can't save this capture as a \"%s\" file.",
3669 wtap_file_type_short_string(file_type));
3670 errmsg = errmsg_errno;
3672 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3675 case WTAP_ERR_BAD_FILE:
3676 /* Seen only when opening a capture file for reading. */
3677 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3678 "The file \"%%s\" appears to be damaged or corrupt.\n"
3681 errmsg = errmsg_errno;
3684 case WTAP_ERR_CANT_OPEN:
3686 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3688 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3691 case WTAP_ERR_SHORT_READ:
3692 errmsg = "The file \"%s\" appears to have been cut short"
3693 " in the middle of a packet or other data.";
3696 case WTAP_ERR_SHORT_WRITE:
3697 errmsg = "A full header couldn't be written to the file \"%s\".";
3700 case WTAP_ERR_DECOMPRESS:
3701 /* Seen only when opening a capture file for reading. */
3702 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3703 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3706 errmsg = errmsg_errno;
3710 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3711 "The file \"%%s\" could not be %s: %s.",
3712 for_writing ? "created" : "opened",
3713 wtap_strerror(err));
3714 errmsg = errmsg_errno;
3718 errmsg = file_open_error_message(err, for_writing);
3723 * Open/create errors are reported with an console message in TShark.
3726 open_failure_message(const char *filename, int err, gboolean for_writing)
3728 fprintf(stderr, "tshark: ");
3729 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3730 fprintf(stderr, "\n");
3735 * General errors are reported with an console message in TShark.
3738 failure_message(const char *msg_format, va_list ap)
3740 fprintf(stderr, "tshark: ");
3741 vfprintf(stderr, msg_format, ap);
3742 fprintf(stderr, "\n");
3746 * Read errors are reported with an console message in TShark.
3749 read_failure_message(const char *filename, int err)
3751 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3752 filename, g_strerror(err));
3756 * Write errors are reported with an console message in TShark.
3759 write_failure_message(const char *filename, int err)
3761 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3762 filename, g_strerror(err));
3766 * Print to the standard error. This is a command-line tool, so there's
3767 * no need to pop up a console.
3770 vfprintf_stderr(const char *fmt, va_list ap)
3772 vfprintf(stderr, fmt, ap);
3776 fprintf_stderr(const char *fmt, ...)
3781 vfprintf_stderr(fmt, ap);
3786 * Report an error in command-line arguments.
3789 cmdarg_err(const char *fmt, ...)
3794 failure_message(fmt, ap);
3799 * Report additional information for an error in command-line arguments.
3802 cmdarg_err_cont(const char *fmt, ...)
3807 vfprintf(stderr, fmt, ap);
3808 fprintf(stderr, "\n");