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);
761 if (running_with_special_privs()) {
762 fprintf(stderr, " This could be dangerous.");
764 fprintf(stderr, "\n");
769 check_capture_privs(void) {
772 /* Warn the user if npf.sys isn't loaded. */
773 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
774 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
775 "capturing or\nlisting interfaces.\n");
781 show_version(GString *comp_info_str, GString *runtime_info_str)
783 printf("TShark " VERSION "%s\n"
790 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
791 runtime_info_str->str);
795 main(int argc, char *argv[])
797 char *init_progfile_dir_error;
799 gboolean arg_error = FALSE;
805 char *gpf_path, *pf_path;
806 char *gdp_path, *dp_path;
807 int gpf_open_errno, gpf_read_errno;
808 int pf_open_errno, pf_read_errno;
809 int gdp_open_errno, gdp_read_errno;
810 int dp_open_errno, dp_read_errno;
812 volatile int exit_status = 0;
814 gboolean list_link_layer_types = FALSE;
815 gboolean start_capture = FALSE;
820 interface_options interface_opts;
822 gboolean capture_option_specified = FALSE;
824 gboolean quiet = FALSE;
825 #ifdef PCAP_NG_DEFAULT
826 volatile int out_file_type = WTAP_FILE_PCAPNG;
828 volatile int out_file_type = WTAP_FILE_PCAP;
830 volatile gboolean out_file_name_res = FALSE;
831 gchar *volatile cf_name = NULL;
832 gchar *rfilter = NULL;
833 #ifdef HAVE_PCAP_OPEN_DEAD
834 struct bpf_program fcode;
836 dfilter_t *rfcode = NULL;
839 GLogLevelFlags log_flags;
841 gchar *output_only = NULL;
844 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
845 #define OPTSTRING_B "B:"
847 #define OPTSTRING_B ""
848 #endif /* _WIN32 or HAVE_PCAP_CREATE */
849 #else /* HAVE_LIBPCAP */
850 #define OPTSTRING_B ""
851 #endif /* HAVE_LIBPCAP */
853 #ifdef HAVE_PCAP_CREATE
854 #define OPTSTRING_I "I"
856 #define OPTSTRING_I ""
859 #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:"
861 static const char optstring[] = OPTSTRING;
864 arg_list_utf_16to8(argc, argv);
865 #if !GLIB_CHECK_VERSION(2,31,0)
871 * Get credential information for later use.
873 init_process_policies();
876 * Attempt to get the pathname of the executable file.
878 init_progfile_dir_error = init_progfile_dir(argv[0], main);
879 if (init_progfile_dir_error != NULL) {
880 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
881 init_progfile_dir_error);
885 * In order to have the -X opts assigned before the wslua machine starts
886 * we need to call getopts before epan_init() gets called.
889 optind_initial = optind;
891 while ((opt = getopt(argc, argv, optstring)) != -1) {
893 case 'C': /* Configuration Profile */
894 if (profile_exists (optarg, FALSE)) {
895 set_profile_name (optarg);
897 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
909 optind = optind_initial;
914 /** Send All g_log messages to our own handler **/
918 G_LOG_LEVEL_CRITICAL|
923 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
925 g_log_set_handler(NULL,
927 tshark_log_handler, NULL /* user_data */);
928 g_log_set_handler(LOG_DOMAIN_MAIN,
930 tshark_log_handler, NULL /* user_data */);
933 g_log_set_handler(LOG_DOMAIN_CAPTURE,
935 tshark_log_handler, NULL /* user_data */);
936 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
938 tshark_log_handler, NULL /* user_data */);
941 initialize_funnel_ops();
944 capture_opts_init(&global_capture_opts, &cfile);
947 timestamp_set_type(TS_RELATIVE);
948 timestamp_set_precision(TS_PREC_AUTO);
949 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
951 /* Register all dissectors; we must do this before checking for the
952 "-G" flag, as the "-G" flag dumps information registered by the
953 dissectors, and we must do it before we read the preferences, in
954 case any dissectors register preferences. */
955 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
956 failure_message, open_failure_message, read_failure_message,
957 write_failure_message);
959 /* Register all tap listeners; we do this before we parse the arguments,
960 as the "-z" argument can specify a registered tap. */
962 /* we register the plugin taps before the other taps because
963 stats_tree taps plugins will be registered as tap listeners
964 by stats_tree_stat.c and need to registered before that */
966 register_all_plugin_tap_listeners();
968 register_all_tap_listeners();
970 /* Now register the preferences for any non-dissector modules.
971 We must do that before we read the preferences as well. */
972 prefs_register_modules();
974 /* If invoked with the "-G" flag, we dump out information based on
975 the argument to the "-G" flag; if no argument is specified,
976 for backwards compatibility we dump out a glossary of display
979 XXX - we do this here, for now, to support "-G" with no arguments.
980 If none of our build or other processes uses "-G" with no arguments,
981 we can just process it with the other arguments. */
982 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
983 proto_initialize_all_prefixes();
986 proto_registrar_dump_fields(1);
988 if (strcmp(argv[2], "fields") == 0)
989 proto_registrar_dump_fields(1);
990 else if (strcmp(argv[2], "fields2") == 0)
991 proto_registrar_dump_fields(2);
992 else if (strcmp(argv[2], "fields3") == 0)
993 proto_registrar_dump_fields(3);
994 else if (strcmp(argv[2], "protocols") == 0)
995 proto_registrar_dump_protocols();
996 else if (strcmp(argv[2], "values") == 0)
997 proto_registrar_dump_values();
998 else if (strcmp(argv[2], "ftypes") == 0)
999 proto_registrar_dump_ftypes();
1000 else if (strcmp(argv[2], "decodes") == 0)
1001 dissector_dump_decodes();
1002 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1003 dissector_dump_heur_decodes();
1004 else if (strcmp(argv[2], "defaultprefs") == 0)
1006 else if (strcmp(argv[2], "plugins") == 0)
1008 else if (strcmp(argv[2], "?") == 0)
1009 glossary_option_help();
1010 else if (strcmp(argv[2], "-?") == 0)
1011 glossary_option_help();
1012 else if (strcmp(argv[2], "currentprefs") == 0) {
1013 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1014 &pf_open_errno, &pf_read_errno, &pf_path);
1017 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1024 /* Set the C-language locale to the native environment. */
1025 setlocale(LC_ALL, "");
1027 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1028 &pf_open_errno, &pf_read_errno, &pf_path);
1029 if (gpf_path != NULL) {
1030 if (gpf_open_errno != 0) {
1031 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1032 pf_path, g_strerror(gpf_open_errno));
1034 if (gpf_read_errno != 0) {
1035 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1036 pf_path, g_strerror(gpf_read_errno));
1039 if (pf_path != NULL) {
1040 if (pf_open_errno != 0) {
1041 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1042 g_strerror(pf_open_errno));
1044 if (pf_read_errno != 0) {
1045 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1046 pf_path, g_strerror(pf_read_errno));
1052 /* Set the name resolution code's flags from the preferences. */
1053 gbl_resolv_flags = prefs_p->name_resolve;
1055 /* Read the disabled protocols file. */
1056 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1057 &dp_path, &dp_open_errno, &dp_read_errno);
1058 if (gdp_path != NULL) {
1059 if (gdp_open_errno != 0) {
1060 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1061 gdp_path, g_strerror(gdp_open_errno));
1063 if (gdp_read_errno != 0) {
1064 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1065 gdp_path, g_strerror(gdp_read_errno));
1069 if (dp_path != NULL) {
1070 if (dp_open_errno != 0) {
1072 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1073 g_strerror(dp_open_errno));
1075 if (dp_read_errno != 0) {
1077 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1078 g_strerror(dp_read_errno));
1083 check_capture_privs();
1085 cap_file_init(&cfile);
1087 /* Print format defaults to this. */
1088 print_format = PR_FMT_TEXT;
1090 output_fields = output_fields_new();
1092 /* Now get our args */
1093 while ((opt = getopt(argc, argv, optstring)) != -1) {
1095 case '2': /* Perform two pass analysis */
1096 perform_two_pass_analysis = TRUE;
1098 case 'a': /* autostop criteria */
1099 case 'b': /* Ringbuffer option */
1100 case 'c': /* Capture x packets */
1101 case 'f': /* capture filter */
1102 case 'i': /* Use interface x */
1103 case 'p': /* Don't capture in promiscuous mode */
1104 #ifdef HAVE_PCAP_CREATE
1105 case 'I': /* Capture in monitor mode, if available */
1107 case 's': /* Set the snapshot (capture) length */
1108 case 'w': /* Write to capture file x */
1109 case 'y': /* Set the pcap data link type */
1110 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1111 case 'B': /* Buffer size */
1112 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1114 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1119 capture_option_specified = TRUE;
1124 /* Configuration profile settings were already processed just ignore them this time*/
1126 case 'd': /* Decode as rule */
1127 if (!add_decode_as(optarg))
1130 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1131 case 'K': /* Kerberos keytab file */
1132 read_keytab_file(optarg);
1135 case 'D': /* Print a list of capture devices and exit */
1137 if_list = capture_interface_list(&err, &err_str);
1138 if (if_list == NULL) {
1140 case CANT_GET_INTERFACE_LIST:
1141 case DONT_HAVE_PCAP:
1142 cmdarg_err("%s", err_str);
1146 case NO_INTERFACES_FOUND:
1147 cmdarg_err("There are no interfaces on which a capture can be done");
1152 capture_opts_print_interfaces(if_list);
1153 free_interface_list(if_list);
1156 capture_option_specified = TRUE;
1162 output_fields_add(output_fields, optarg);
1166 if(!output_fields_set_option(output_fields, optarg)) {
1167 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1168 output_fields_list_options(stderr);
1173 out_file_type = wtap_short_string_to_file_type(optarg);
1174 if (out_file_type < 0) {
1175 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1176 list_capture_types();
1180 case 'W': /* Select extra information to save in our capture file */
1181 /* This is patterned after the -N flag which may not be the best idea. */
1182 if (strchr(optarg, 'n'))
1183 out_file_name_res = TRUE;
1185 case 'H': /* Read address to name mappings from a hosts file */
1186 if (! read_hosts_file(optarg))
1188 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1191 out_file_name_res = TRUE;
1194 case 'h': /* Print help and exit */
1198 case 'l': /* "Line-buffer" standard output */
1199 /* This isn't line-buffering, strictly speaking, it's just
1200 flushing the standard output after the information for
1201 each packet is printed; however, that should be good
1202 enough for all the purposes to which "-l" is put (and
1203 is probably actually better for "-V", as it does fewer
1206 See the comment in "process_packet()" for an explanation of
1207 why we do that, and why we don't just use "setvbuf()" to
1208 make the standard output line-buffered (short version: in
1209 Windows, "line-buffered" is the same as "fully-buffered",
1210 and the output buffer is only flushed when it fills up). */
1211 line_buffered = TRUE;
1213 case 'L': /* Print list of link-layer types and exit */
1215 list_link_layer_types = TRUE;
1217 capture_option_specified = TRUE;
1221 case 'n': /* No name resolution */
1222 gbl_resolv_flags = RESOLV_NONE;
1224 case 'N': /* Select what types of addresses/port #s to resolve */
1225 if (gbl_resolv_flags == RESOLV_ALL)
1226 gbl_resolv_flags = RESOLV_NONE;
1227 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1228 if (badopt != '\0') {
1229 cmdarg_err("-N specifies unknown resolving option '%c';",
1231 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1235 case 'o': /* Override preference from command line */
1236 switch (prefs_set_pref(optarg)) {
1241 case PREFS_SET_SYNTAX_ERR:
1242 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1246 case PREFS_SET_NO_SUCH_PREF:
1247 case PREFS_SET_OBSOLETE:
1248 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1253 case 'q': /* Quiet */
1256 case 'r': /* Read capture file x */
1257 cf_name = g_strdup(optarg);
1259 case 'R': /* Read file filter */
1262 case 'P': /* Print packets even when writing to a file */
1263 print_packet_info = TRUE;
1265 case 'S': /* Set the line Separator to be printed between packets */
1266 separator = strdup(optarg);
1268 case 't': /* Time stamp type */
1269 if (strcmp(optarg, "r") == 0)
1270 timestamp_set_type(TS_RELATIVE);
1271 else if (strcmp(optarg, "a") == 0)
1272 timestamp_set_type(TS_ABSOLUTE);
1273 else if (strcmp(optarg, "ad") == 0)
1274 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1275 else if (strcmp(optarg, "d") == 0)
1276 timestamp_set_type(TS_DELTA);
1277 else if (strcmp(optarg, "dd") == 0)
1278 timestamp_set_type(TS_DELTA_DIS);
1279 else if (strcmp(optarg, "e") == 0)
1280 timestamp_set_type(TS_EPOCH);
1281 else if (strcmp(optarg, "u") == 0)
1282 timestamp_set_type(TS_UTC);
1283 else if (strcmp(optarg, "ud") == 0)
1284 timestamp_set_type(TS_UTC_WITH_DATE);
1286 cmdarg_err("Invalid time stamp type \"%s\"",
1288 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1289 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1293 case 'T': /* printing Type */
1294 if (strcmp(optarg, "text") == 0) {
1295 output_action = WRITE_TEXT;
1296 print_format = PR_FMT_TEXT;
1297 } else if (strcmp(optarg, "ps") == 0) {
1298 output_action = WRITE_TEXT;
1299 print_format = PR_FMT_PS;
1300 } else if (strcmp(optarg, "pdml") == 0) {
1301 output_action = WRITE_XML;
1303 } else if (strcmp(optarg, "psml") == 0) {
1304 output_action = WRITE_XML;
1306 } else if(strcmp(optarg, "fields") == 0) {
1307 output_action = WRITE_FIELDS;
1308 verbose = TRUE; /* Need full tree info */
1310 cmdarg_err("Invalid -T parameter.");
1311 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1315 case 'u': /* Seconds type */
1316 if (strcmp(optarg, "s") == 0)
1317 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1318 else if (strcmp(optarg, "hms") == 0)
1319 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1321 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1322 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1326 case 'v': /* Show version and exit */
1328 GString *comp_info_str;
1329 GString *runtime_info_str;
1330 /* Assemble the compile-time version information string */
1331 comp_info_str = g_string_new("Compiled ");
1332 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1334 /* Assemble the run-time version information string */
1335 runtime_info_str = g_string_new("Running ");
1336 get_runtime_version_info(runtime_info_str, NULL);
1337 show_version(comp_info_str, runtime_info_str);
1338 g_string_free(comp_info_str, TRUE);
1339 g_string_free(runtime_info_str, TRUE);
1343 case 'O': /* Only output these protocols */
1344 output_only = g_strdup(optarg);
1346 case 'V': /* Verbose */
1348 /* The user asked for a verbose output, so let's ensure they get it,
1349 * even if they're writing to a file.
1351 print_packet_info = TRUE;
1353 case 'x': /* Print packet data in hex (and ASCII) */
1355 /* The user asked for hex output, so let's ensure they get it,
1356 * even if they're writing to a file.
1358 print_packet_info = TRUE;
1363 /* We won't call the init function for the stat this soon
1364 as it would disallow MATE's fields (which are registered
1365 by the preferences set callback) from being used as
1366 part of a tap filter. Instead, we just add the argument
1367 to a list of stat arguments. */
1368 if (!process_stat_cmd_arg(optarg)) {
1369 cmdarg_err("invalid -z argument.");
1370 cmdarg_err_cont(" -z argument must be one of :");
1371 list_stat_cmd_args();
1376 case '?': /* Bad flag - print usage message */
1379 list_capture_types();
1389 /* If we specified output fields, but not the output field type... */
1390 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1391 cmdarg_err("Output fields were specified with \"-e\", "
1392 "but \"-Tfields\" was not specified.");
1394 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1395 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1396 "specified with \"-e\".");
1401 /* If no capture filter or read filter has been specified, and there are
1402 still command-line arguments, treat them as the tokens of a capture
1403 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1404 flag was specified. */
1405 if (optind < argc) {
1406 if (cf_name != NULL) {
1407 if (rfilter != NULL) {
1408 cmdarg_err("Read filters were specified both with \"-R\" "
1409 "and with additional command-line arguments.");
1412 rfilter = get_args_as_string(argc, argv, optind);
1415 if (global_capture_opts.default_options.cfilter) {
1416 cmdarg_err("A default capture filter was specified both with \"-f\""
1417 " and with additional command-line arguments.");
1420 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1421 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1422 if (interface_opts.cfilter == NULL) {
1423 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1424 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1425 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1427 cmdarg_err("A capture filter was specified both with \"-f\""
1428 " and with additional command-line arguments.");
1432 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1434 capture_option_specified = TRUE;
1440 if (!global_capture_opts.saving_to_file) {
1441 /* We're not saving the capture to a file; if "-q" wasn't specified,
1442 we should print packet information */
1444 print_packet_info = TRUE;
1446 /* We're saving to a file; if we're writing to the standard output.
1447 and we'll also be writing dissected packets to the standard
1448 output, reject the request. At best, we could redirect that
1449 to the standard error; we *can't* write both to the standard
1450 output and have either of them be useful. */
1451 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1452 cmdarg_err("You can't write both raw packet data and dissected packets"
1453 " to the standard output.");
1458 /* We're not saving the capture to a file; if "-q" wasn't specified,
1459 we should print packet information */
1461 print_packet_info = TRUE;
1464 #ifndef HAVE_LIBPCAP
1465 if (capture_option_specified)
1466 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1473 /* We don't support capture filters when reading from a capture file
1474 (the BPF compiler doesn't support all link-layer types that we
1475 support in capture files we read). */
1477 if (cf_name != NULL) {
1478 if (global_capture_opts.default_options.cfilter) {
1479 cmdarg_err("Only read filters, not capture filters, "
1480 "can be specified when reading a capture file.");
1487 if (output_action != WRITE_TEXT) {
1488 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1493 if (output_only != NULL) {
1497 cmdarg_err("-O requires -V");
1501 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1502 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1503 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1508 if (list_link_layer_types) {
1509 /* We're supposed to list the link-layer types for an interface;
1510 did the user also specify a capture file to be read? */
1512 /* Yes - that's bogus. */
1513 cmdarg_err("You can't specify -L and a capture file to be read.");
1516 /* No - did they specify a ring buffer option? */
1517 if (global_capture_opts.multi_files_on) {
1518 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1524 * "-r" was specified, so we're reading a capture file.
1525 * Capture options don't apply here.
1527 if (global_capture_opts.multi_files_on) {
1528 cmdarg_err("Multiple capture files requested, but "
1529 "a capture isn't being done.");
1532 if (global_capture_opts.has_file_duration) {
1533 cmdarg_err("Switching capture files after a time interval was specified, but "
1534 "a capture isn't being done.");
1537 if (global_capture_opts.has_ring_num_files) {
1538 cmdarg_err("A ring buffer of capture files was specified, but "
1539 "a capture isn't being done.");
1542 if (global_capture_opts.has_autostop_files) {
1543 cmdarg_err("A maximum number of capture files was specified, but "
1544 "a capture isn't being done.");
1548 /* Note: TShark now allows the restriction of a _read_ file by packet count
1549 * and byte count as well as a write file. Other autostop options remain valid
1550 * only for a write file.
1552 if (global_capture_opts.has_autostop_duration) {
1553 cmdarg_err("A maximum capture time was specified, but "
1554 "a capture isn't being done.");
1559 * "-r" wasn't specified, so we're doing a live capture.
1561 if (global_capture_opts.saving_to_file) {
1562 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1564 /* When capturing, we only support writing pcap or pcap-ng format. */
1565 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1566 cmdarg_err("Live captures can only be saved in libpcap format.");
1569 if (global_capture_opts.multi_files_on) {
1570 /* Multiple-file mode doesn't work under certain conditions:
1571 a) it doesn't work if you're writing to the standard output;
1572 b) it doesn't work if you're writing to a pipe;
1574 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1575 cmdarg_err("Multiple capture files requested, but "
1576 "the capture is being written to the standard output.");
1579 if (global_capture_opts.output_to_pipe) {
1580 cmdarg_err("Multiple capture files requested, but "
1581 "the capture file is a pipe.");
1584 if (!global_capture_opts.has_autostop_filesize &&
1585 !global_capture_opts.has_file_duration) {
1586 cmdarg_err("Multiple capture files requested, but "
1587 "no maximum capture file size or duration was specified.");
1591 /* Currently, we don't support read filters when capturing
1592 and saving the packets. */
1593 if (rfilter != NULL) {
1594 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1598 /* They didn't specify a "-w" flag, so we won't be saving to a
1599 capture file. Check for options that only make sense if
1600 we're saving to a file. */
1601 if (global_capture_opts.has_autostop_filesize) {
1602 cmdarg_err("Maximum capture file size specified, but "
1603 "capture isn't being saved to a file.");
1606 if (global_capture_opts.multi_files_on) {
1607 cmdarg_err("Multiple capture files requested, but "
1608 "the capture isn't being saved to a file.");
1617 /* Start windows sockets */
1618 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1621 /* Notify all registered modules that have had any of their preferences
1622 changed either from one of the preferences file or from the command
1623 line that their preferences have changed. */
1626 /* At this point MATE will have registered its field array so we can
1627 have a tap filter with one of MATE's late-registered fields as part
1628 of the filter. We can now process all the "-z" arguments. */
1629 start_requested_stats();
1632 /* We currently don't support taps, or printing dissected packets,
1633 if we're writing to a pipe. */
1634 if (global_capture_opts.saving_to_file &&
1635 global_capture_opts.output_to_pipe) {
1636 if (tap_listeners_require_dissection()) {
1637 cmdarg_err("Taps aren't supported when saving to a pipe.");
1640 if (print_packet_info) {
1641 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1647 /* disabled protocols as per configuration file */
1648 if (gdp_path == NULL && dp_path == NULL) {
1649 set_disabled_protos_list();
1652 /* Build the column format array */
1653 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1656 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1657 capture_opts_trim_ring_num_files(&global_capture_opts);
1660 if (rfilter != NULL) {
1661 if (!dfilter_compile(rfilter, &rfcode)) {
1662 cmdarg_err("%s", dfilter_error_msg);
1664 #ifdef HAVE_PCAP_OPEN_DEAD
1668 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1670 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1672 " Note: That display filter code looks like a valid capture filter;");
1674 " maybe you mixed them up?");
1683 cfile.rfcode = rfcode;
1685 if (print_packet_info) {
1686 /* If we're printing as text or PostScript, we have
1687 to create a print stream. */
1688 if (output_action == WRITE_TEXT) {
1689 switch (print_format) {
1692 print_stream = print_stream_text_stdio_new(stdout);
1696 print_stream = print_stream_ps_stdio_new(stdout);
1700 g_assert_not_reached();
1705 /* We have to dissect each packet if:
1707 we're printing information about each packet;
1709 we're using a read filter on the packets;
1711 we're using any taps that need dissection. */
1712 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1716 * We're reading a capture file.
1720 * Immediately relinquish any special privileges we have; we must not
1721 * be allowed to read any capture files the user running TShark
1724 relinquish_special_privs_perm();
1725 print_current_user();
1727 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1732 /* Set timestamp precision; there should arguably be a command-line
1733 option to let the user set this. */
1734 switch(wtap_file_tsprecision(cfile.wth)) {
1735 case(WTAP_FILE_TSPREC_SEC):
1736 timestamp_set_precision(TS_PREC_AUTO_SEC);
1738 case(WTAP_FILE_TSPREC_DSEC):
1739 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1741 case(WTAP_FILE_TSPREC_CSEC):
1742 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1744 case(WTAP_FILE_TSPREC_MSEC):
1745 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1747 case(WTAP_FILE_TSPREC_USEC):
1748 timestamp_set_precision(TS_PREC_AUTO_USEC);
1750 case(WTAP_FILE_TSPREC_NSEC):
1751 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1754 g_assert_not_reached();
1757 /* Process the packets in the file */
1760 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1761 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1762 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1764 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1767 CATCH(OutOfMemoryError) {
1771 "Sorry, but TShark has to terminate now!\n"
1773 "Some infos / workarounds can be found at:\n"
1774 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1779 /* We still dump out the results of taps, etc., as we might have
1780 read some packets; however, we exit with an error status. */
1784 /* No capture file specified, so we're supposed to do a live capture
1785 (or get a list of link-layer types for a live capture device);
1786 do we have support for live captures? */
1788 /* trim the interface name and exit if that failed */
1789 if (!capture_opts_trim_iface(&global_capture_opts,
1790 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1794 /* if requested, list the link layer types and exit */
1795 if (list_link_layer_types) {
1797 interface_options interface_opts;
1799 /* Get the list of link-layer types for the capture devices. */
1800 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1801 if_capabilities_t *caps;
1803 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1804 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1806 cmdarg_err("%s", err_str);
1810 if (caps->data_link_types == NULL) {
1811 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1814 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1815 free_if_capabilities(caps);
1820 if (print_packet_info) {
1821 if (!write_preamble(NULL)) {
1822 show_print_file_io_error(errno);
1825 } else if (!quiet) {
1827 * We're not printing information for each packet, and the user
1828 * didn't ask us not to print a count of packets as they arrive,
1829 * so print that count so the user knows that packets are arriving.
1831 * XXX - what if the user wants to do a live capture, doesn't want
1832 * to save it to a file, doesn't want information printed for each
1833 * packet, does want some "-z" statistic, and wants packet counts
1834 * so they know whether they're seeing any packets?
1836 print_packet_counts = TRUE;
1839 /* For now, assume libpcap gives microsecond precision. */
1840 timestamp_set_precision(TS_PREC_AUTO_USEC);
1843 * XXX - this returns FALSE if an error occurred, but it also
1844 * returns FALSE if the capture stops because a time limit
1845 * was reached (and possibly other limits), so we can't assume
1846 * it means an error.
1848 * The capture code is a bit twisty, so it doesn't appear to
1849 * be an easy fix. We just ignore the return value for now.
1850 * Instead, pass on the exit status from the capture child.
1853 exit_status = global_capture_opts.fork_child_status;
1855 if (print_packet_info) {
1856 if (!write_finale()) {
1858 show_print_file_io_error(err);
1862 /* No - complain. */
1863 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1870 if (cfile.frames != NULL) {
1871 free_frame_data_sequence(cfile.frames);
1872 cfile.frames = NULL;
1875 draw_tap_listeners(TRUE);
1876 funnel_dump_all_text_windows();
1879 output_fields_free(output_fields);
1880 output_fields = NULL;
1885 /*#define USE_BROKEN_G_MAIN_LOOP*/
1887 #ifdef USE_BROKEN_G_MAIN_LOOP
1890 gboolean loop_running = FALSE;
1892 guint32 packet_count = 0;
1895 /* XXX - move to the right position / file */
1896 /* read from a pipe (callback) */
1897 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1899 typedef struct pipe_input_tag {
1903 pipe_input_cb_t input_cb;
1904 guint pipe_input_id;
1906 GMutex *callback_running;
1910 static pipe_input_t pipe_input;
1913 /* The timer has expired, see if there's stuff to read from the pipe,
1914 if so, do the callback */
1916 pipe_timer_cb(gpointer data)
1920 gboolean result, result1;
1922 pipe_input_t *pipe_input_p = data;
1923 gint iterations = 0;
1925 g_mutex_lock (pipe_input_p->callback_running);
1927 /* try to read data from the pipe only 5 times, to avoid blocking */
1928 while(iterations < 5) {
1929 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1931 /* Oddly enough although Named pipes don't work on win9x,
1932 PeekNamedPipe does !!! */
1933 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1934 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1936 /* Get the child process exit status */
1937 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1940 /* If the Peek returned an error, or there are bytes to be read
1941 or the childwatcher thread has terminated then call the normal
1943 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1945 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1947 /* And call the real handler */
1948 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1949 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1950 /* pipe closed, return false so that the timer is stopped */
1951 g_mutex_unlock (pipe_input_p->callback_running);
1956 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1957 /* No data, stop now */
1964 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1966 g_mutex_unlock (pipe_input_p->callback_running);
1968 /* we didn't stopped the timer, so let it run */
1975 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1978 pipe_input.source = source;
1979 pipe_input.child_process = child_process;
1980 pipe_input.user_data = user_data;
1981 pipe_input.input_cb = input_cb;
1984 #if GLIB_CHECK_VERSION(2,31,0)
1985 pipe_input.callback_running = g_malloc(sizeof(GMutex));
1986 g_mutex_init(pipe_input.callback_running);
1988 pipe_input.callback_running = g_mutex_new();
1990 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1991 do this but that doesn't cover all win32 platforms. GTK can do
1992 this but doesn't seem to work over processes. Attempt to do
1993 something similar here, start a timer and check for data on every
1995 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1996 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2007 GString *str = g_string_new("");
2008 #ifdef USE_TSHARK_SELECT
2012 struct sigaction action, oldaction;
2016 * XXX - dropping privileges is still required, until code cleanup is done
2018 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2019 * when it's done, we don't need special privileges to run tshark at all,
2020 * therefore we don't need to drop these privileges
2021 * The only thing we might want to keep is a warning if tshark is run as root,
2022 * as it's no longer necessary and potentially dangerous.
2024 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2025 * We've opened the capture device, so we shouldn't need any special
2026 * privileges any more; relinquish those privileges.
2028 * XXX - if we have saved set-user-ID support, we should give up those
2029 * privileges immediately, and then reclaim them long enough to get
2030 * a list of network interfaces and to open one, and then give them
2031 * up again, so that stuff we do while processing the argument list,
2032 * reading the user's preferences, loading and starting plugins
2033 * (especially *user* plugins), etc. is done with the user's privileges,
2034 * not special privileges.
2036 relinquish_special_privs_perm();
2037 print_current_user();
2039 /* Cleanup all data structures used for dissection. */
2040 cleanup_dissection();
2041 /* Initialize all data structures used for dissection. */
2045 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2046 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2048 /* Catch SIGINT and SIGTERM and, if we get either of them,
2049 clean up and exit. If SIGHUP isn't being ignored, catch
2050 it too and, if we get it, clean up and exit.
2052 We restart any read that was in progress, so that it doesn't
2053 disrupt reading from the sync pipe. The signal handler tells
2054 the capture child to finish; it will report that it finished,
2055 or will exit abnormally, so we'll stop reading from the sync
2056 pipe, pick up the exit status, and quit. */
2057 action.sa_handler = capture_cleanup;
2058 action.sa_flags = SA_RESTART;
2059 sigemptyset(&action.sa_mask);
2060 sigaction(SIGTERM, &action, NULL);
2061 sigaction(SIGINT, &action, NULL);
2062 sigaction(SIGHUP, NULL, &oldaction);
2063 if (oldaction.sa_handler == SIG_DFL)
2064 sigaction(SIGHUP, &action, NULL);
2067 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2068 quiet mode, report the number of packets we've captured.
2070 Again, restart any read that was in progress, so that it doesn't
2071 disrupt reading from the sync pipe. */
2072 action.sa_handler = report_counts_siginfo;
2073 action.sa_flags = SA_RESTART;
2074 sigemptyset(&action.sa_mask);
2075 sigaction(SIGINFO, &action, NULL);
2076 #endif /* SIGINFO */
2079 global_capture_opts.state = CAPTURE_PREPARING;
2081 /* Let the user know which interfaces were chosen. */
2082 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2083 interface_options interface_opts;
2085 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2086 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2087 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2088 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2091 if (global_capture_opts.ifaces->len < 2) {
2093 if (global_capture_opts.ifaces->len < 4) {
2095 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2096 interface_options interface_opts;
2098 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2100 if (global_capture_opts.ifaces->len > 2) {
2101 g_string_append_printf(str, ",");
2103 g_string_append_printf(str, " ");
2104 if (i == global_capture_opts.ifaces->len - 1) {
2105 g_string_append_printf(str, "and ");
2108 g_string_append_printf(str, "%s", interface_opts.descr);
2111 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2113 fprintf(stderr, "Capturing on %s\n", str->str);
2114 g_string_free(str, TRUE);
2116 ret = sync_pipe_start(&global_capture_opts);
2121 /* the actual capture loop
2123 * XXX - glib doesn't seem to provide any event based loop handling.
2125 * XXX - for whatever reason,
2126 * calling g_main_loop_new() ends up in 100% cpu load.
2128 * But that doesn't matter: in UNIX we can use select() to find an input
2129 * source with something to do.
2131 * But that doesn't matter because we're in a CLI (that doesn't need to
2132 * update a GUI or something at the same time) so it's OK if we block
2133 * trying to read from the pipe.
2135 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2136 * wrong (but I leave it there in case I am...).
2139 #ifdef USE_TSHARK_SELECT
2141 FD_SET(pipe_input.source, &readfds);
2144 loop_running = TRUE;
2148 while (loop_running)
2150 #ifdef USE_TSHARK_SELECT
2151 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2157 } else if (ret == 1) {
2159 /* Call the real handler */
2160 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2161 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2164 #ifdef USE_TSHARK_SELECT
2169 CATCH(OutOfMemoryError) {
2173 "Sorry, but TShark has to terminate now!\n"
2175 "Some infos / workarounds can be found at:\n"
2176 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2184 /* XXX - move the call to main_window_update() out of capture_sync.c */
2185 /* dummy for capture_sync.c to make linker happy */
2186 void main_window_update(void)
2190 /* capture child detected an error */
2192 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2194 cmdarg_err("%s", error_msg);
2195 cmdarg_err_cont("%s", secondary_error_msg);
2199 /* capture child detected an capture filter related error */
2201 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2203 dfilter_t *rfcode = NULL;
2204 interface_options interface_opts;
2206 g_assert(i < capture_opts->ifaces->len);
2207 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2209 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2211 "Invalid capture filter \"%s\" for interface %s!\n"
2213 "That string looks like a valid display filter; however, it isn't a valid\n"
2214 "capture filter (%s).\n"
2216 "Note that display filters and capture filters don't have the same syntax,\n"
2217 "so you can't use most display filter expressions as capture filters.\n"
2219 "See the User's Guide for a description of the capture filter syntax.",
2220 interface_opts.cfilter, interface_opts.descr, error_message);
2221 dfilter_free(rfcode);
2224 "Invalid capture filter \"%s\" for interface %s!\n"
2226 "That string isn't a valid capture filter (%s).\n"
2227 "See the User's Guide for a description of the capture filter syntax.",
2228 interface_opts.cfilter, interface_opts.descr, error_message);
2233 /* capture child tells us we have a new (or the first) capture file */
2235 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2237 gboolean is_tempfile;
2240 if(capture_opts->state == CAPTURE_PREPARING) {
2241 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2243 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2245 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2247 /* free the old filename */
2248 if (capture_opts->save_file != NULL) {
2250 /* we start a new capture file, close the old one (if we had one before) */
2251 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2252 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2253 wtap_close(((capture_file *) capture_opts->cf)->wth);
2255 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2258 g_free(capture_opts->save_file);
2259 is_tempfile = FALSE;
2261 /* we didn't had a save_file before, must be a tempfile */
2265 /* save the new filename */
2266 capture_opts->save_file = g_strdup(new_file);
2268 /* if we are in real-time mode, open the new file now */
2270 /* Attempt to open the capture file and set up to read from it. */
2271 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2275 /* Don't unlink (delete) the save file - leave it around,
2276 for debugging purposes. */
2277 g_free(capture_opts->save_file);
2278 capture_opts->save_file = NULL;
2283 capture_opts->state = CAPTURE_RUNNING;
2289 /* capture child tells us we have new packets to read */
2291 capture_input_new_packets(capture_options *capture_opts, int to_read)
2297 capture_file *cf = capture_opts->cf;
2298 gboolean filtering_tap_listeners;
2303 * Prevent a SIGINFO handler from writing to the standard error while
2304 * we're doing so or writing to the standard output; instead, have it
2305 * just set a flag telling us to print that information when we're done.
2308 #endif /* SIGINFO */
2310 /* Do we have any tap listeners with filters? */
2311 filtering_tap_listeners = have_filtering_tap_listeners();
2313 /* Get the union of the flags for all tap listeners. */
2314 tap_flags = union_of_tap_listener_flags();
2317 while (to_read-- && cf->wth) {
2318 wtap_cleareof(cf->wth);
2319 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2321 /* read from file failed, tell the capture child to stop */
2322 sync_pipe_stop(capture_opts);
2323 wtap_close(cf->wth);
2326 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2327 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2328 filtering_tap_listeners, tap_flags);
2331 /* packet successfully read and gone through the "Read Filter" */
2337 * Dumpcap's doing all the work; we're not doing any dissection.
2338 * Count all the packets it wrote.
2340 packet_count += to_read;
2343 if (print_packet_counts) {
2344 /* We're printing packet counts. */
2345 if (packet_count != 0) {
2346 fprintf(stderr, "\r%u ", packet_count);
2347 /* stderr could be line buffered */
2354 * Allow SIGINFO handlers to write.
2359 * If a SIGINFO handler asked us to write out capture counts, do so.
2363 #endif /* SIGINFO */
2369 if (!print_packet_counts) {
2370 /* Report the count only if we aren't printing a packet count
2371 as packets arrive. */
2372 fprintf(stderr, "%u packet%s captured\n", packet_count,
2373 plurality(packet_count, "", "s"));
2376 infoprint = FALSE; /* we just reported it */
2377 #endif /* SIGINFO */
2382 report_counts_siginfo(int signum _U_)
2384 int sav_errno = errno;
2385 /* If we've been told to delay printing, just set a flag asking
2386 that we print counts (if we're supposed to), otherwise print
2387 the count of packets captured (if we're supposed to). */
2394 #endif /* SIGINFO */
2397 /* capture child detected any packet drops? */
2399 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2401 if (print_packet_counts) {
2402 /* We're printing packet counts to stderr.
2403 Send a newline so that we move to the line after the packet count. */
2404 fprintf(stderr, "\n");
2408 /* We're printing packet counts to stderr.
2409 Send a newline so that we move to the line after the packet count. */
2410 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2416 * Capture child closed its side of the pipe, report any error and
2417 * do the required cleanup.
2420 capture_input_closed(capture_options *capture_opts, gchar *msg)
2423 fprintf(stderr, "tshark: %s\n", msg);
2427 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2428 wtap_close(((capture_file *) capture_opts->cf)->wth);
2429 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2430 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2433 #ifdef USE_BROKEN_G_MAIN_LOOP
2434 /*g_main_loop_quit(loop);*/
2437 loop_running = FALSE;
2446 capture_cleanup(DWORD ctrltype _U_)
2448 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2449 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2450 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2451 like SIGTERM at least when the machine's shutting down.
2453 For now, we handle them all as indications that we should clean up
2454 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2457 We must return TRUE so that no other handler - such as one that would
2458 terminate the process - gets called.
2460 XXX - for some reason, typing ^C to TShark, if you run this in
2461 a Cygwin console window in at least some versions of Cygwin,
2462 causes TShark to terminate immediately; this routine gets
2463 called, but the main loop doesn't get a chance to run and
2464 exit cleanly, at least if this is compiled with Microsoft Visual
2465 C++ (i.e., it's a property of the Cygwin console window or Bash;
2466 it happens if TShark is not built with Cygwin - for all I know,
2467 building it with Cygwin may make the problem go away). */
2469 /* tell the capture child to stop */
2470 sync_pipe_stop(&global_capture_opts);
2472 /* don't stop our own loop already here, otherwise status messages and
2473 * cleanup wouldn't be done properly. The child will indicate the stop of
2474 * everything by calling capture_input_closed() later */
2480 capture_cleanup(int signum _U_)
2482 /* tell the capture child to stop */
2483 sync_pipe_stop(&global_capture_opts);
2485 /* don't stop our own loop already here, otherwise status messages and
2486 * cleanup wouldn't be done properly. The child will indicate the stop of
2487 * everything by calling capture_input_closed() later */
2490 #endif /* HAVE_LIBPCAP */
2493 process_packet_first_pass(capture_file *cf,
2494 gint64 offset, const struct wtap_pkthdr *whdr,
2495 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2502 /* The frame number of this packet is one more than the count of
2503 frames in this packet. */
2504 framenum = cf->count + 1;
2506 /* If we're not running a display filter and we're not printing any
2507 packet information, we don't need to do a dissection. This means
2508 that all packets can be marked as 'passed'. */
2511 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2513 /* If we're going to print packet information, or we're going to
2514 run a read filter, or we're going to process taps, set up to
2515 do a dissection and do so. */
2516 if (do_dissection) {
2517 if (gbl_resolv_flags)
2518 /* Grab any resolved addresses */
2519 host_name_lookup_process(NULL);
2521 /* The protocol tree will be "visible", i.e., printed, only if we're
2522 printing packet details, which is true if we're printing stuff
2523 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2525 epan_dissect_init(&edt, FALSE, FALSE);
2527 /* If we're running a read filter, prime the epan_dissect_t with that
2530 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2532 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2533 &first_ts, &prev_dis_ts, &prev_cap_ts);
2535 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2537 /* Run the read filter if we have one. */
2539 passed = dfilter_apply_edt(cf->rfcode, &edt);
2543 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2544 frame_data_sequence_add(cf->frames, &fdlocal);
2549 epan_dissect_cleanup(&edt);
2555 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2556 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2557 gboolean filtering_tap_listeners, guint tap_flags)
2559 gboolean create_proto_tree;
2564 /* If we're not running a display filter and we're not printing any
2565 packet information, we don't need to do a dissection. This means
2566 that all packets can be marked as 'passed'. */
2569 /* If we're going to print packet information, or we're going to
2570 run a read filter, or we're going to process taps, set up to
2571 do a dissection and do so. */
2572 if (do_dissection) {
2573 if (gbl_resolv_flags)
2574 /* Grab any resolved addresses */
2575 host_name_lookup_process(NULL);
2577 if (cf->rfcode || verbose || filtering_tap_listeners ||
2578 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2579 create_proto_tree = TRUE;
2581 create_proto_tree = FALSE;
2583 /* The protocol tree will be "visible", i.e., printed, only if we're
2584 printing packet details, which is true if we're printing stuff
2585 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2587 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2589 /* If we're running a read filter, prime the epan_dissect_t with that
2592 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2594 col_custom_prime_edt(&edt, &cf->cinfo);
2596 tap_queue_init(&edt);
2598 /* We only need the columns if either
2600 1) some tap needs the columns
2604 2) we're printing packet info but we're *not* verbose; in verbose
2605 mode, we print the protocol tree, not the protocol summary. */
2606 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2611 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2613 tap_push_tapped_queue(&edt);
2615 /* Run the read filter if we have one. */
2617 passed = dfilter_apply_edt(cf->rfcode, &edt);
2621 /* Process this packet. */
2622 if (print_packet_info) {
2623 /* We're printing packet information; print the information for
2626 print_packet(cf, &edt);
2628 print_packet(cf, NULL);
2630 /* The ANSI C standard does not appear to *require* that a line-buffered
2631 stream be flushed to the host environment whenever a newline is
2632 written, it just says that, on such a stream, characters "are
2633 intended to be transmitted to or from the host environment as a
2634 block when a new-line character is encountered".
2636 The Visual C++ 6.0 C implementation doesn't do what is intended;
2637 even if you set a stream to be line-buffered, it still doesn't
2638 flush the buffer at the end of every line.
2640 So, if the "-l" flag was specified, we flush the standard output
2641 at the end of a packet. This will do the right thing if we're
2642 printing packet summary lines, and, as we print the entire protocol
2643 tree for a single packet without waiting for anything to happen,
2644 it should be as good as line-buffered mode if we're printing
2645 protocol trees. (The whole reason for the "-l" flag in either
2646 tcpdump or TShark is to allow the output of a live capture to
2647 be piped to a program or script and to have that script see the
2648 information for the packet as soon as it's printed, rather than
2649 having to wait until a standard I/O buffer fills up. */
2653 if (ferror(stdout)) {
2654 show_print_file_io_error(errno);
2660 if (do_dissection) {
2661 epan_dissect_cleanup(&edt);
2667 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2668 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2671 int snapshot_length;
2675 gchar *err_info = NULL;
2677 char *save_file_string = NULL;
2678 gboolean filtering_tap_listeners;
2681 #ifdef PCAP_NG_DEFAULT
2682 linktype = WTAP_ENCAP_PER_PACKET;
2684 linktype = wtap_file_encap(cf->wth);
2686 if (save_file != NULL) {
2687 /* Get a string that describes what we're writing to */
2688 save_file_string = output_file_description(save_file);
2690 /* Set up to write to the capture file. */
2691 snapshot_length = wtap_snapshot_length(cf->wth);
2692 if (snapshot_length == 0) {
2693 /* Snapshot length of input file not known. */
2694 snapshot_length = WTAP_MAX_PACKET_SIZE;
2696 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2697 FALSE /* compressed */, &err);
2700 /* We couldn't set up to write to the capture file. */
2703 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2704 cmdarg_err("Capture files can't be written in that format.");
2707 case WTAP_ERR_UNSUPPORTED_ENCAP:
2708 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2709 cmdarg_err("The capture file being read can't be written as a "
2710 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2713 case WTAP_ERR_CANT_OPEN:
2714 cmdarg_err("The %s couldn't be created for some "
2715 "unknown reason.", save_file_string);
2718 case WTAP_ERR_SHORT_WRITE:
2719 cmdarg_err("A full header couldn't be written to the %s.",
2724 cmdarg_err("The %s could not be created: %s.", save_file_string,
2725 wtap_strerror(err));
2731 if (print_packet_info) {
2732 if (!write_preamble(cf)) {
2734 show_print_file_io_error(err);
2741 if (pdh && out_file_name_res) {
2742 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2743 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2744 wtap_file_type_short_string(out_file_type));
2748 /* Do we have any tap listeners with filters? */
2749 filtering_tap_listeners = have_filtering_tap_listeners();
2751 /* Get the union of the flags for all tap listeners. */
2752 tap_flags = union_of_tap_listener_flags();
2754 if (perform_two_pass_analysis) {
2756 int old_max_packet_count = max_packet_count;
2758 /* Allocate a frame_data_sequence for all the frames. */
2759 cf->frames = new_frame_data_sequence();
2761 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2762 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2763 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2764 /* Stop reading if we have the maximum number of packets;
2765 * When the -c option has not been used, max_packet_count
2766 * starts at 0, which practically means, never stop reading.
2767 * (unless we roll over max_packet_count ?)
2769 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2770 err = 0; /* This is not an error */
2776 /* Close the sequential I/O side, to free up memory it requires. */
2777 wtap_sequential_close(cf->wth);
2779 /* Allow the protocol dissectors to free up memory that they
2780 * don't need after the sequential run-through of the packets. */
2781 postseq_cleanup_all_protocols();
2783 max_packet_count = old_max_packet_count;
2785 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2786 fdata = frame_data_sequence_find(cf->frames, framenum);
2787 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2788 cf->pd, fdata->cap_len, &err, &err_info)) {
2789 if (process_packet_second_pass(cf, fdata,
2790 &cf->pseudo_header, cf->pd,
2791 filtering_tap_listeners, tap_flags)) {
2792 /* Either there's no read filtering or this packet passed the
2793 filter, so, if we're writing to a capture file, write
2796 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2797 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2799 /* Error writing to a capture file */
2802 case WTAP_ERR_UNSUPPORTED_ENCAP:
2804 * This is a problem with the particular frame we're writing;
2805 * note that, and give the frame number.
2807 * XXX - framenum is not necessarily the frame number in
2808 * the input file if there was a read filter.
2811 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2812 framenum, cf->filename,
2813 wtap_file_type_short_string(out_file_type));
2817 show_capture_file_io_error(save_file, err, FALSE);
2820 wtap_dump_close(pdh, &err);
2824 /* Stop reading if we have the maximum number of packets;
2825 * When the -c option has not been used, max_packet_count
2826 * starts at 0, which practically means, never stop reading.
2827 * (unless we roll over max_packet_count ?)
2829 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2830 err = 0; /* This is not an error */
2839 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2842 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2843 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2844 filtering_tap_listeners, tap_flags)) {
2845 /* Either there's no read filtering or this packet passed the
2846 filter, so, if we're writing to a capture file, write
2849 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2850 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2852 /* Error writing to a capture file */
2855 case WTAP_ERR_UNSUPPORTED_ENCAP:
2857 * This is a problem with the particular frame we're writing;
2858 * note that, and give the frame number.
2861 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2862 framenum, cf->filename,
2863 wtap_file_type_short_string(out_file_type));
2867 show_capture_file_io_error(save_file, err, FALSE);
2870 wtap_dump_close(pdh, &err);
2874 /* Stop reading if we have the maximum number of packets;
2875 * When the -c option has not been used, max_packet_count
2876 * starts at 0, which practically means, never stop reading.
2877 * (unless we roll over max_packet_count ?)
2879 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2880 err = 0; /* This is not an error */
2889 * Print a message noting that the read failed somewhere along the line.
2891 * If we're printing packet data, and the standard output and error are
2892 * going to the same place, flush the standard output, so everything
2893 * buffered up is written, and then print a newline to the standard error
2894 * before printing the error message, to separate it from the packet
2895 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2896 * the _fstat() documentation at Microsoft doesn't indicate whether
2897 * st_ino is even supported.)
2900 if (print_packet_info) {
2901 struct stat stat_stdout, stat_stderr;
2903 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2904 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2905 stat_stdout.st_ino == stat_stderr.st_ino) {
2907 fprintf(stderr, "\n");
2914 case WTAP_ERR_UNSUPPORTED:
2915 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
2916 cf->filename, err_info);
2920 case WTAP_ERR_UNSUPPORTED_ENCAP:
2921 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2922 cf->filename, err_info);
2926 case WTAP_ERR_CANT_READ:
2927 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2931 case WTAP_ERR_SHORT_READ:
2932 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2936 case WTAP_ERR_BAD_FILE:
2937 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2938 cf->filename, err_info);
2942 case WTAP_ERR_DECOMPRESS:
2943 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2944 "(%s)", cf->filename, err_info);
2948 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2949 cf->filename, wtap_strerror(err));
2952 if (save_file != NULL) {
2953 /* Now close the capture file. */
2954 if (!wtap_dump_close(pdh, &err))
2955 show_capture_file_io_error(save_file, err, TRUE);
2958 if (save_file != NULL) {
2959 /* Now close the capture file. */
2960 if (!wtap_dump_close(pdh, &err))
2961 show_capture_file_io_error(save_file, err, TRUE);
2963 if (print_packet_info) {
2964 if (!write_finale()) {
2966 show_print_file_io_error(err);
2973 wtap_close(cf->wth);
2976 g_free(save_file_string);
2982 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2983 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2984 gboolean filtering_tap_listeners, guint tap_flags)
2987 gboolean create_proto_tree;
2992 /* Count this packet. */
2995 /* If we're not running a display filter and we're not printing any
2996 packet information, we don't need to do a dissection. This means
2997 that all packets can be marked as 'passed'. */
3000 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3002 /* If we're going to print packet information, or we're going to
3003 run a read filter, or we're going to process taps, set up to
3004 do a dissection and do so. */
3005 if (do_dissection) {
3006 if (print_packet_info && gbl_resolv_flags)
3007 /* Grab any resolved addresses */
3008 host_name_lookup_process(NULL);
3010 if (cf->rfcode || verbose || filtering_tap_listeners ||
3011 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3012 create_proto_tree = TRUE;
3014 create_proto_tree = FALSE;
3016 /* The protocol tree will be "visible", i.e., printed, only if we're
3017 printing packet details, which is true if we're printing stuff
3018 ("print_packet_info" is true) and we're in verbose mode ("verbose"
3020 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
3022 /* If we're running a read filter, prime the epan_dissect_t with that
3025 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3027 col_custom_prime_edt(&edt, &cf->cinfo);
3029 tap_queue_init(&edt);
3031 /* We only need the columns if either
3033 1) some tap needs the columns
3037 2) we're printing packet info but we're *not* verbose; in verbose
3038 mode, we print the protocol tree, not the protocol summary. */
3039 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
3044 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3045 &first_ts, &prev_dis_ts, &prev_cap_ts);
3047 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
3049 tap_push_tapped_queue(&edt);
3051 /* Run the read filter if we have one. */
3053 passed = dfilter_apply_edt(cf->rfcode, &edt);
3057 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
3059 /* Process this packet. */
3060 if (print_packet_info) {
3061 /* We're printing packet information; print the information for
3064 print_packet(cf, &edt);
3066 print_packet(cf, NULL);
3068 /* The ANSI C standard does not appear to *require* that a line-buffered
3069 stream be flushed to the host environment whenever a newline is
3070 written, it just says that, on such a stream, characters "are
3071 intended to be transmitted to or from the host environment as a
3072 block when a new-line character is encountered".
3074 The Visual C++ 6.0 C implementation doesn't do what is intended;
3075 even if you set a stream to be line-buffered, it still doesn't
3076 flush the buffer at the end of every line.
3078 So, if the "-l" flag was specified, we flush the standard output
3079 at the end of a packet. This will do the right thing if we're
3080 printing packet summary lines, and, as we print the entire protocol
3081 tree for a single packet without waiting for anything to happen,
3082 it should be as good as line-buffered mode if we're printing
3083 protocol trees. (The whole reason for the "-l" flag in either
3084 tcpdump or TShark is to allow the output of a live capture to
3085 be piped to a program or script and to have that script see the
3086 information for the packet as soon as it's printed, rather than
3087 having to wait until a standard I/O buffer fills up. */
3091 if (ferror(stdout)) {
3092 show_print_file_io_error(errno);
3098 if (do_dissection) {
3099 epan_dissect_cleanup(&edt);
3100 frame_data_cleanup(&fdata);
3106 write_preamble(capture_file *cf)
3108 switch (output_action) {
3111 return print_preamble(print_stream, cf ? cf->filename : NULL);
3115 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3117 write_psml_preamble(stdout);
3118 return !ferror(stdout);
3121 write_fields_preamble(output_fields, stdout);
3122 return !ferror(stdout);
3125 g_assert_not_reached();
3131 get_line_buf(size_t len)
3133 static char *line_bufp = NULL;
3134 static size_t line_buf_len = 256;
3135 size_t new_line_buf_len;
3137 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3138 new_line_buf_len *= 2)
3140 if (line_bufp == NULL) {
3141 line_buf_len = new_line_buf_len;
3142 line_bufp = g_malloc(line_buf_len + 1);
3144 if (new_line_buf_len > line_buf_len) {
3145 line_buf_len = new_line_buf_len;
3146 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3153 print_columns(capture_file *cf)
3160 line_bufp = get_line_buf(256);
3163 for (i = 0; i < cf->cinfo.num_cols; i++) {
3164 /* Skip columns not marked as visible. */
3165 if (!get_column_visible(i))
3167 switch (cf->cinfo.col_fmt[i]) {
3171 * Don't print this if we're doing a live capture from a network
3172 * interface - if we're doing a live capture, you won't be
3173 * able to look at the capture in the future (it's not being
3174 * saved anywhere), so the frame numbers are unlikely to be
3177 * (XXX - it might be nice to be able to save and print at
3178 * the same time, sort of like an "Update list of packets
3179 * in real time" capture in Wireshark.)
3181 if (global_capture_opts.ifaces->len > 0)
3184 column_len = strlen(cf->cinfo.col_data[i]);
3187 line_bufp = get_line_buf(buf_offset + column_len);
3188 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3194 case COL_ABS_DATE_TIME:
3196 case COL_UTC_DATE_TIME: /* XXX - wider */
3197 column_len = strlen(cf->cinfo.col_data[i]);
3198 if (column_len < 10)
3200 line_bufp = get_line_buf(buf_offset + column_len);
3201 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3207 case COL_DEF_DL_SRC:
3208 case COL_RES_DL_SRC:
3209 case COL_UNRES_DL_SRC:
3210 case COL_DEF_NET_SRC:
3211 case COL_RES_NET_SRC:
3212 case COL_UNRES_NET_SRC:
3213 column_len = strlen(cf->cinfo.col_data[i]);
3214 if (column_len < 12)
3216 line_bufp = get_line_buf(buf_offset + column_len);
3217 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3223 case COL_DEF_DL_DST:
3224 case COL_RES_DL_DST:
3225 case COL_UNRES_DL_DST:
3226 case COL_DEF_NET_DST:
3227 case COL_RES_NET_DST:
3228 case COL_UNRES_NET_DST:
3229 column_len = strlen(cf->cinfo.col_data[i]);
3230 if (column_len < 12)
3232 line_bufp = get_line_buf(buf_offset + column_len);
3233 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3237 column_len = strlen(cf->cinfo.col_data[i]);
3238 line_bufp = get_line_buf(buf_offset + column_len);
3239 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3242 buf_offset += column_len;
3243 if (i != cf->cinfo.num_cols - 1) {
3245 * This isn't the last column, so we need to print a
3246 * separator between this column and the next.
3248 * If we printed a network source and are printing a
3249 * network destination of the same type next, separate
3250 * them with " -> "; if we printed a network destination
3251 * and are printing a network source of the same type
3252 * next, separate them with " <- "; otherwise separate them
3255 * We add enough space to the buffer for " <- " or " -> ",
3256 * even if we're only adding " ".
3258 line_bufp = get_line_buf(buf_offset + 4);
3259 switch (cf->cinfo.col_fmt[i]) {
3264 switch (cf->cinfo.col_fmt[i + 1]) {
3269 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3274 g_strlcat(line_bufp + buf_offset, " ", 5);
3280 case COL_DEF_DL_SRC:
3281 case COL_RES_DL_SRC:
3282 case COL_UNRES_DL_SRC:
3283 switch (cf->cinfo.col_fmt[i + 1]) {
3285 case COL_DEF_DL_DST:
3286 case COL_RES_DL_DST:
3287 case COL_UNRES_DL_DST:
3288 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3293 g_strlcat(line_bufp + buf_offset, " ", 5);
3299 case COL_DEF_NET_SRC:
3300 case COL_RES_NET_SRC:
3301 case COL_UNRES_NET_SRC:
3302 switch (cf->cinfo.col_fmt[i + 1]) {
3304 case COL_DEF_NET_DST:
3305 case COL_RES_NET_DST:
3306 case COL_UNRES_NET_DST:
3307 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3312 g_strlcat(line_bufp + buf_offset, " ", 5);
3321 switch (cf->cinfo.col_fmt[i + 1]) {
3326 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3331 g_strlcat(line_bufp + buf_offset, " ", 5);
3337 case COL_DEF_DL_DST:
3338 case COL_RES_DL_DST:
3339 case COL_UNRES_DL_DST:
3340 switch (cf->cinfo.col_fmt[i + 1]) {
3342 case COL_DEF_DL_SRC:
3343 case COL_RES_DL_SRC:
3344 case COL_UNRES_DL_SRC:
3345 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3350 g_strlcat(line_bufp + buf_offset, " ", 5);
3356 case COL_DEF_NET_DST:
3357 case COL_RES_NET_DST:
3358 case COL_UNRES_NET_DST:
3359 switch (cf->cinfo.col_fmt[i + 1]) {
3361 case COL_DEF_NET_SRC:
3362 case COL_RES_NET_SRC:
3363 case COL_UNRES_NET_SRC:
3364 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3369 g_strlcat(line_bufp + buf_offset, " ", 5);
3376 g_strlcat(line_bufp + buf_offset, " ", 5);
3382 return print_line(print_stream, 0, line_bufp);
3386 print_packet(capture_file *cf, epan_dissect_t *edt)
3388 print_args_t print_args;
3391 /* Print the information in the protocol tree. */
3392 switch (output_action) {
3395 print_args.to_file = TRUE;
3396 print_args.format = print_format;
3397 print_args.print_summary = !verbose;
3398 print_args.print_hex = verbose && print_hex;
3399 print_args.print_formfeed = FALSE;
3400 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3402 /* init the packet range */
3403 packet_range_init(&print_args.range);
3405 if (!proto_tree_print(&print_args, edt, print_stream))
3408 /* "print_hex_data()" will put out a leading blank line, as well
3409 as a trailing one; print one here, to separate the packets,
3410 only if "print_hex_data()" won't be called. */
3411 if (!print_line(print_stream, 0, separator))
3417 proto_tree_write_pdml(edt, stdout);
3419 return !ferror(stdout);
3421 proto_tree_write_fields(output_fields, edt, stdout);
3423 return !ferror(stdout);
3426 /* Just fill in the columns. */
3427 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3429 /* Now print them. */
3430 switch (output_action) {
3433 if (!print_columns(cf))
3438 proto_tree_write_psml(edt, stdout);
3439 return !ferror(stdout);
3440 case WRITE_FIELDS: /*No non-verbose "fields" format */
3441 g_assert_not_reached();
3446 if (!print_hex_data(print_stream, edt))
3448 if (!print_line(print_stream, 0, ""))
3457 switch (output_action) {
3460 return print_finale(print_stream);
3464 write_pdml_finale(stdout);
3466 write_psml_finale(stdout);
3467 return !ferror(stdout);
3470 write_fields_finale(output_fields, stdout);
3471 return !ferror(stdout);
3474 g_assert_not_reached();
3480 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3484 char err_msg[2048+1];
3486 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3490 /* The open succeeded. Fill in the information for this file. */
3492 /* Cleanup all data structures used for dissection. */
3493 cleanup_dissection();
3494 /* Initialize all data structures used for dissection. */
3498 cf->f_datalen = 0; /* not used, but set it anyway */
3500 /* Set the file name because we need it to set the follow stream filter.
3501 XXX - is that still true? We need it for other reasons, though,
3503 cf->filename = g_strdup(fname);
3505 /* Indicate whether it's a permanent or temporary file. */
3506 cf->is_tempfile = is_tempfile;
3508 /* If it's a temporary capture buffer file, mark it as not saved. */
3509 cf->user_saved = !is_tempfile;
3511 cf->cd_t = wtap_file_type(cf->wth);
3513 cf->drops_known = FALSE;
3515 cf->snap = wtap_snapshot_length(cf->wth);
3516 if (cf->snap == 0) {
3517 /* Snapshot length not known. */
3518 cf->has_snap = FALSE;
3519 cf->snap = WTAP_MAX_PACKET_SIZE;
3521 cf->has_snap = TRUE;
3522 nstime_set_zero(&cf->elapsed_time);
3523 nstime_set_unset(&first_ts);
3524 nstime_set_unset(&prev_dis_ts);
3525 nstime_set_unset(&prev_cap_ts);
3527 cf->state = FILE_READ_IN_PROGRESS;
3529 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3530 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3535 g_snprintf(err_msg, sizeof err_msg,
3536 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3537 cmdarg_err("%s", err_msg);
3542 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3544 char *save_file_string;
3546 save_file_string = output_file_description(fname);
3551 cmdarg_err("Not all the packets could be written to the %s because there is "
3552 "no space left on the file system.",
3558 cmdarg_err("Not all the packets could be written to the %s because you are "
3559 "too close to, or over your disk quota.",
3564 case WTAP_ERR_CANT_CLOSE:
3565 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3569 case WTAP_ERR_SHORT_WRITE:
3570 cmdarg_err("Not all the packets could be written to the %s.",
3576 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3577 wtap_strerror(err));
3579 cmdarg_err("An error occurred while writing to the %s: %s.",
3580 save_file_string, wtap_strerror(err));
3584 g_free(save_file_string);
3588 show_print_file_io_error(int err)
3593 cmdarg_err("Not all the packets could be printed because there is "
3594 "no space left on the file system.");
3599 cmdarg_err("Not all the packets could be printed because you are "
3600 "too close to, or over your disk quota.");
3605 cmdarg_err("An error occurred while printing packets: %s.",
3612 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3616 static char errmsg_errno[1024+1];
3619 /* Wiretap error. */
3622 case WTAP_ERR_NOT_REGULAR_FILE:
3623 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3626 case WTAP_ERR_RANDOM_OPEN_PIPE:
3627 /* Seen only when opening a capture file for reading. */
3628 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3631 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3632 /* Seen only when opening a capture file for reading. */
3633 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3636 case WTAP_ERR_UNSUPPORTED:
3637 /* Seen only when opening a capture file for reading. */
3638 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3639 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3642 errmsg = errmsg_errno;
3645 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3646 /* Seen only when opening a capture file for writing. */
3647 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3648 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3649 "written to a pipe.", wtap_file_type_short_string(file_type));
3650 errmsg = errmsg_errno;
3653 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3654 /* Seen only when opening a capture file for writing. */
3655 errmsg = "TShark doesn't support writing capture files in that format.";
3658 case WTAP_ERR_UNSUPPORTED_ENCAP:
3660 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3661 "TShark can't save this capture as a \"%s\" file.",
3662 wtap_file_type_short_string(file_type));
3664 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3665 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3669 errmsg = errmsg_errno;
3672 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3674 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3675 "TShark can't save this capture as a \"%s\" file.",
3676 wtap_file_type_short_string(file_type));
3677 errmsg = errmsg_errno;
3679 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3682 case WTAP_ERR_BAD_FILE:
3683 /* Seen only when opening a capture file for reading. */
3684 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3685 "The file \"%%s\" appears to be damaged or corrupt.\n"
3688 errmsg = errmsg_errno;
3691 case WTAP_ERR_CANT_OPEN:
3693 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3695 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3698 case WTAP_ERR_SHORT_READ:
3699 errmsg = "The file \"%s\" appears to have been cut short"
3700 " in the middle of a packet or other data.";
3703 case WTAP_ERR_SHORT_WRITE:
3704 errmsg = "A full header couldn't be written to the file \"%s\".";
3707 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3708 errmsg = "This file type cannot be written as a compressed file.";
3711 case WTAP_ERR_DECOMPRESS:
3712 /* Seen only when opening a capture file for reading. */
3713 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3714 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3717 errmsg = errmsg_errno;
3721 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3722 "The file \"%%s\" could not be %s: %s.",
3723 for_writing ? "created" : "opened",
3724 wtap_strerror(err));
3725 errmsg = errmsg_errno;
3729 errmsg = file_open_error_message(err, for_writing);
3734 * Open/create errors are reported with an console message in TShark.
3737 open_failure_message(const char *filename, int err, gboolean for_writing)
3739 fprintf(stderr, "tshark: ");
3740 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3741 fprintf(stderr, "\n");
3746 * General errors are reported with an console message in TShark.
3749 failure_message(const char *msg_format, va_list ap)
3751 fprintf(stderr, "tshark: ");
3752 vfprintf(stderr, msg_format, ap);
3753 fprintf(stderr, "\n");
3757 * Read errors are reported with an console message in TShark.
3760 read_failure_message(const char *filename, int err)
3762 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3763 filename, g_strerror(err));
3767 * Write errors are reported with an console message in TShark.
3770 write_failure_message(const char *filename, int err)
3772 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3773 filename, g_strerror(err));
3777 * Print to the standard error. This is a command-line tool, so there's
3778 * no need to pop up a console.
3781 vfprintf_stderr(const char *fmt, va_list ap)
3783 vfprintf(stderr, fmt, ap);
3787 fprintf_stderr(const char *fmt, ...)
3792 vfprintf_stderr(fmt, ap);
3797 * Report an error in command-line arguments.
3800 cmdarg_err(const char *fmt, ...)
3805 failure_message(fmt, ap);
3810 * Report additional information for an error in command-line arguments.
3813 cmdarg_err_cont(const char *fmt, ...)
3818 vfprintf(stderr, fmt, ap);
3819 fprintf(stderr, "\n");