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 "capture_errs.h"
93 #include <wsutil/unicode-utils.h>
95 #include "capture_sync.h"
96 #endif /* HAVE_LIBPCAP */
98 #include <epan/funnel.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 libpcap\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 decodes dump \"layer type\"/\"decode as\" associations and exit\n");
353 fprintf(output, "\n");
354 fprintf(output, "Preference reports:\n");
355 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
356 fprintf(output, " -G currentprefs dump current preferences and exit\n");
357 fprintf(output, "\n");
362 * For a dissector table, print on the stream described by output,
363 * its short name (which is what's used in the "-d" option) and its
367 display_dissector_table_names(const char *table_name, const char *ui_name,
370 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
374 * For a dissector handle, print on the stream described by output,
375 * the filter name (which is what's used in the "-d" option) and the full
376 * name for the protocol that corresponds to this handle.
379 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
382 const gchar* proto_filter_name;
383 const gchar* proto_ui_name;
385 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
387 if (proto_id != -1) {
388 proto_filter_name = proto_get_protocol_filter_name(proto_id);
389 proto_ui_name = proto_get_protocol_name(proto_id);
390 g_assert(proto_filter_name != NULL);
391 g_assert(proto_ui_name != NULL);
393 fprintf((FILE *)output, "\t%s (%s)\n",
400 * The protocol_name_search structure is used by find_protocol_name_func()
401 * to pass parameters and store results
403 struct protocol_name_search{
404 gchar *searched_name; /* Protocol filter name we are looking for */
405 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
406 guint nb_match; /* How many dissectors matched searched_name */
408 typedef struct protocol_name_search *protocol_name_search_t;
411 * This function parses all dissectors associated with a table to find the
412 * one whose protocol has the specified filter name. It is called
413 * as a reference function in a call to dissector_table_foreach_handle.
414 * The name we are looking for, as well as the results, are stored in the
415 * protocol_name_search struct pointed to by user_data.
416 * If called using dissector_table_foreach_handle, we actually parse the
417 * whole list of dissectors.
420 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
424 const gchar *protocol_filter_name;
425 protocol_name_search_t search_info;
429 search_info = (protocol_name_search_t)user_data;
431 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
432 if (proto_id != -1) {
433 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
434 g_assert(protocol_filter_name != NULL);
435 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
437 if (search_info->nb_match == 0) {
438 /* Record this handle only if this is the first match */
439 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
441 search_info->nb_match++;
447 * Print all layer type names supported.
448 * We send the output to the stream described by the handle output.
452 fprint_all_layer_types(FILE *output)
455 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
459 * Print all protocol names supported for a specific layer type.
460 * table_name contains the layer type name in which the search is performed.
461 * We send the output to the stream described by the handle output.
465 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
468 dissector_table_foreach_handle(table_name,
469 display_dissector_names,
474 * The function below parses the command-line parameters for the decode as
475 * feature (a string pointer by cl_param).
476 * It checks the format of the command-line, searches for a matching table
477 * and dissector. If a table/dissector match is not found, we display a
478 * summary of the available tables/dissectors (on stderr) and return FALSE.
479 * If everything is fine, we get the "Decode as" preference activated,
480 * then we return TRUE.
483 add_decode_as(const gchar *cl_param)
487 gchar *decoded_param;
488 gchar *remaining_param;
490 gchar *dissector_str;
491 dissector_handle_t dissector_matching;
492 dissector_table_t table_matching;
493 ftenum_t dissector_table_selector_type;
494 struct protocol_name_search user_protocol_name;
496 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
499 decoded_param = g_strdup(cl_param);
500 g_assert(decoded_param);
503 /* The lines below will parse this string (modifying it) to extract all
504 necessary information. Note that decoded_param is still needed since
505 strings are not copied - we just save pointers. */
507 /* This section extracts a layer type (table_name) from decoded_param */
508 table_name = decoded_param; /* Layer type string starts from beginning */
510 remaining_param = strchr(table_name, '=');
511 if (remaining_param == NULL) {
512 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
513 /* If the argument does not follow the template, carry on anyway to check
514 if the table name is at least correct. If remaining_param is NULL,
515 we'll exit anyway further down */
518 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
521 /* Remove leading and trailing spaces from the table name */
522 while ( table_name[0] == ' ' )
524 while ( table_name[strlen(table_name) - 1] == ' ' )
525 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
527 /* The following part searches a table matching with the layer type specified */
528 table_matching = NULL;
530 /* Look for the requested table */
531 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
532 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
535 table_matching = find_dissector_table(table_name);
536 if (!table_matching) {
537 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
541 if (!table_matching) {
542 /* Display a list of supported layer types to help the user, if the
543 specified layer type was not found */
544 cmdarg_err("Valid layer types are:");
545 fprint_all_layer_types(stderr);
547 if (remaining_param == NULL || !table_matching) {
548 /* Exit if the layer type was not found, or if no '=' separator was found
550 g_free(decoded_param);
554 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
555 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
558 remaining_param++; /* Move to the second '=' */
559 *remaining_param = '\0'; /* Remove the second '=' */
561 remaining_param++; /* Position after the layer type string */
563 /* This section extracts a selector value (selector_str) from decoded_param */
565 selector_str = remaining_param; /* Next part starts with the selector number */
567 remaining_param = strchr(selector_str, ',');
568 if (remaining_param == NULL) {
569 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
570 /* If the argument does not follow the template, carry on anyway to check
571 if the selector value is at least correct. If remaining_param is NULL,
572 we'll exit anyway further down */
575 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
578 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
580 switch (dissector_table_selector_type) {
586 /* The selector for this table is an unsigned number. Parse it as such.
587 There's no need to remove leading and trailing spaces from the
588 selector number string, because sscanf will do that for us. */
589 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
590 cmdarg_err("Invalid selector number \"%s\"", selector_str);
591 g_free(decoded_param);
598 /* The selector for this table is a string. */
602 /* There are currently no dissector tables with any types other
603 than the ones listed above. */
604 g_assert_not_reached();
607 if (remaining_param == NULL) {
608 /* Exit if no ',' separator was found (see above) */
609 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
610 fprint_all_protocols_for_layer_types(stderr, table_name);
611 g_free(decoded_param);
615 remaining_param++; /* Position after the selector number string */
617 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
619 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
621 /* Remove leading and trailing spaces from the dissector name */
622 while ( dissector_str[0] == ' ' )
624 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
625 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
627 dissector_matching = NULL;
629 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
630 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 */
631 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
634 user_protocol_name.nb_match = 0;
635 user_protocol_name.searched_name = dissector_str;
636 user_protocol_name.matched_handle = NULL;
638 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 */
640 if (user_protocol_name.nb_match != 0) {
641 dissector_matching = user_protocol_name.matched_handle;
642 if (user_protocol_name.nb_match > 1) {
643 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
647 /* OK, check whether the problem is that there isn't any such
648 protocol, or that there is but it's not specified as a protocol
649 that's valid for that dissector table.
650 Note, we don't exit here, but dissector_matching will remain NULL,
652 if (proto_get_id_by_filter_name(dissector_str) == -1) {
653 /* No such protocol */
654 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
656 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
657 dissector_str, table_name);
662 if (!dissector_matching) {
663 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
664 fprint_all_protocols_for_layer_types(stderr, table_name);
665 g_free(decoded_param);
669 /* This is the end of the code that parses the command-line options.
670 All information is now stored in the variables:
674 The above variables that are strings are still pointing to areas within
675 decoded_parm. decoded_parm thus still needs to be kept allocated in
676 until we stop needing these variables
677 decoded_param will be deallocated at each exit point of this function */
680 /* We now have a pointer to the handle for the requested dissector
681 (requested protocol) inside the variable dissector_matching */
682 switch (dissector_table_selector_type) {
688 /* The selector for this table is an unsigned number. */
689 dissector_change_uint(table_name, selector, dissector_matching);
694 /* The selector for this table is a string. */
695 dissector_change_string(table_name, selector_str, dissector_matching);
699 /* There are currently no dissector tables with any types other
700 than the ones listed above. */
701 g_assert_not_reached();
703 g_free(decoded_param); /* "Decode As" rule has been successfully added */
708 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
709 const gchar *message, gpointer user_data)
711 /* ignore log message, if log_level isn't interesting based
712 upon the console log preferences.
713 If the preferences haven't been loaded loaded yet, display the
716 The default console_log_level preference value is such that only
717 ERROR, CRITICAL and WARNING level messages are processed;
718 MESSAGE, INFO and DEBUG level messages are ignored.
720 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
721 ERROR and CRITICAL level messages so the current code is a behavioral
722 change. The current behavior is the same as in Wireshark.
724 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
725 prefs.console_log_level != 0) {
729 g_log_default_handler(log_domain, log_level, message, user_data);
734 output_file_description(const char *fname)
736 char *save_file_string;
738 /* Get a string that describes what we're writing to */
739 if (strcmp(fname, "-") == 0) {
740 /* We're writing to the standard output */
741 save_file_string = g_strdup("standard output");
743 /* We're writing to a file with the name in save_file */
744 save_file_string = g_strdup_printf("file \"%s\"", fname);
746 return save_file_string;
750 print_current_user(void) {
751 gchar *cur_user, *cur_group;
752 if (started_with_special_privs()) {
753 cur_user = get_cur_username();
754 cur_group = get_cur_groupname();
755 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
756 cur_user, cur_group);
759 if (running_with_special_privs()) {
760 fprintf(stderr, " This could be dangerous.");
762 fprintf(stderr, "\n");
767 check_capture_privs(void) {
770 /* Warn the user if npf.sys isn't loaded. */
771 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
772 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
773 "capturing or\nlisting interfaces.\n");
779 show_version(GString *comp_info_str, GString *runtime_info_str)
781 printf("TShark " VERSION "%s\n"
788 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
789 runtime_info_str->str);
793 main(int argc, char *argv[])
795 char *init_progfile_dir_error;
797 gboolean arg_error = FALSE;
803 char *gpf_path, *pf_path;
804 char *gdp_path, *dp_path;
805 int gpf_open_errno, gpf_read_errno;
806 int pf_open_errno, pf_read_errno;
807 int gdp_open_errno, gdp_read_errno;
808 int dp_open_errno, dp_read_errno;
810 volatile int exit_status = 0;
812 gboolean list_link_layer_types = FALSE;
813 gboolean start_capture = FALSE;
818 interface_options interface_opts;
820 gboolean capture_option_specified = FALSE;
822 gboolean quiet = FALSE;
823 #ifdef PCAP_NG_DEFAULT
824 volatile int out_file_type = WTAP_FILE_PCAPNG;
826 volatile int out_file_type = WTAP_FILE_PCAP;
828 volatile gboolean out_file_name_res = FALSE;
829 gchar *volatile cf_name = NULL;
830 gchar *rfilter = NULL;
831 #ifdef HAVE_PCAP_OPEN_DEAD
832 struct bpf_program fcode;
834 dfilter_t *rfcode = NULL;
837 GLogLevelFlags log_flags;
839 gchar *output_only = NULL;
842 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
843 #define OPTSTRING_B "B:"
845 #define OPTSTRING_B ""
846 #endif /* _WIN32 or HAVE_PCAP_CREATE */
847 #else /* HAVE_LIBPCAP */
848 #define OPTSTRING_B ""
849 #endif /* HAVE_LIBPCAP */
851 #ifdef HAVE_PCAP_CREATE
852 #define OPTSTRING_I "I"
854 #define OPTSTRING_I ""
857 #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:"
859 static const char optstring[] = OPTSTRING;
862 arg_list_utf_16to8(argc, argv);
863 #if !GLIB_CHECK_VERSION(2,31,0)
869 * Get credential information for later use.
871 init_process_policies();
874 * Attempt to get the pathname of the executable file.
876 init_progfile_dir_error = init_progfile_dir(argv[0], main);
877 if (init_progfile_dir_error != NULL) {
878 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
879 init_progfile_dir_error);
883 * In order to have the -X opts assigned before the wslua machine starts
884 * we need to call getopts before epan_init() gets called.
887 optind_initial = optind;
889 while ((opt = getopt(argc, argv, optstring)) != -1) {
891 case 'C': /* Configuration Profile */
892 if (profile_exists (optarg, FALSE)) {
893 set_profile_name (optarg);
895 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
907 optind = optind_initial;
912 /** Send All g_log messages to our own handler **/
916 G_LOG_LEVEL_CRITICAL|
921 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
923 g_log_set_handler(NULL,
925 tshark_log_handler, NULL /* user_data */);
926 g_log_set_handler(LOG_DOMAIN_MAIN,
928 tshark_log_handler, NULL /* user_data */);
931 g_log_set_handler(LOG_DOMAIN_CAPTURE,
933 tshark_log_handler, NULL /* user_data */);
934 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
936 tshark_log_handler, NULL /* user_data */);
939 initialize_funnel_ops();
942 capture_opts_init(&global_capture_opts, &cfile);
945 timestamp_set_type(TS_RELATIVE);
946 timestamp_set_precision(TS_PREC_AUTO);
947 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
949 /* Register all dissectors; we must do this before checking for the
950 "-G" flag, as the "-G" flag dumps information registered by the
951 dissectors, and we must do it before we read the preferences, in
952 case any dissectors register preferences. */
953 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
954 failure_message, open_failure_message, read_failure_message,
955 write_failure_message);
957 /* Register all tap listeners; we do this before we parse the arguments,
958 as the "-z" argument can specify a registered tap. */
960 /* we register the plugin taps before the other taps because
961 stats_tree taps plugins will be registered as tap listeners
962 by stats_tree_stat.c and need to registered before that */
964 register_all_plugin_tap_listeners();
966 register_all_tap_listeners();
968 /* Now register the preferences for any non-dissector modules.
969 We must do that before we read the preferences as well. */
970 prefs_register_modules();
972 /* If invoked with the "-G" flag, we dump out information based on
973 the argument to the "-G" flag; if no argument is specified,
974 for backwards compatibility we dump out a glossary of display
977 XXX - we do this here, for now, to support "-G" with no arguments.
978 If none of our build or other processes uses "-G" with no arguments,
979 we can just process it with the other arguments. */
980 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
981 proto_initialize_all_prefixes();
984 proto_registrar_dump_fields(1);
986 if (strcmp(argv[2], "fields") == 0)
987 proto_registrar_dump_fields(1);
988 else if (strcmp(argv[2], "fields2") == 0)
989 proto_registrar_dump_fields(2);
990 else if (strcmp(argv[2], "fields3") == 0)
991 proto_registrar_dump_fields(3);
992 else if (strcmp(argv[2], "protocols") == 0)
993 proto_registrar_dump_protocols();
994 else if (strcmp(argv[2], "values") == 0)
995 proto_registrar_dump_values();
996 else if (strcmp(argv[2], "decodes") == 0)
997 dissector_dump_decodes();
998 else if (strcmp(argv[2], "defaultprefs") == 0)
1000 else if (strcmp(argv[2], "plugins") == 0)
1002 else if (strcmp(argv[2], "?") == 0)
1003 glossary_option_help();
1004 else if (strcmp(argv[2], "-?") == 0)
1005 glossary_option_help();
1006 else if (strcmp(argv[2], "currentprefs") == 0) {
1007 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1008 &pf_open_errno, &pf_read_errno, &pf_path);
1011 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1018 /* Set the C-language locale to the native environment. */
1019 setlocale(LC_ALL, "");
1021 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1022 &pf_open_errno, &pf_read_errno, &pf_path);
1023 if (gpf_path != NULL) {
1024 if (gpf_open_errno != 0) {
1025 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1026 pf_path, g_strerror(gpf_open_errno));
1028 if (gpf_read_errno != 0) {
1029 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1030 pf_path, g_strerror(gpf_read_errno));
1033 if (pf_path != NULL) {
1034 if (pf_open_errno != 0) {
1035 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1036 g_strerror(pf_open_errno));
1038 if (pf_read_errno != 0) {
1039 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1040 pf_path, g_strerror(pf_read_errno));
1046 /* Set the name resolution code's flags from the preferences. */
1047 gbl_resolv_flags = prefs_p->name_resolve;
1049 /* Read the disabled protocols file. */
1050 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1051 &dp_path, &dp_open_errno, &dp_read_errno);
1052 if (gdp_path != NULL) {
1053 if (gdp_open_errno != 0) {
1054 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1055 gdp_path, g_strerror(gdp_open_errno));
1057 if (gdp_read_errno != 0) {
1058 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1059 gdp_path, g_strerror(gdp_read_errno));
1063 if (dp_path != NULL) {
1064 if (dp_open_errno != 0) {
1066 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1067 g_strerror(dp_open_errno));
1069 if (dp_read_errno != 0) {
1071 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1072 g_strerror(dp_read_errno));
1077 check_capture_privs();
1079 cap_file_init(&cfile);
1081 /* Print format defaults to this. */
1082 print_format = PR_FMT_TEXT;
1084 output_fields = output_fields_new();
1086 /* Now get our args */
1087 while ((opt = getopt(argc, argv, optstring)) != -1) {
1089 case '2': /* Perform two pass analysis */
1090 perform_two_pass_analysis = TRUE;
1092 case 'a': /* autostop criteria */
1093 case 'b': /* Ringbuffer option */
1094 case 'c': /* Capture x packets */
1095 case 'f': /* capture filter */
1096 case 'i': /* Use interface x */
1097 case 'p': /* Don't capture in promiscuous mode */
1098 #ifdef HAVE_PCAP_CREATE
1099 case 'I': /* Capture in monitor mode, if available */
1101 case 's': /* Set the snapshot (capture) length */
1102 case 'w': /* Write to capture file x */
1103 case 'y': /* Set the pcap data link type */
1104 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1105 case 'B': /* Buffer size */
1106 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1108 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1113 capture_option_specified = TRUE;
1118 /* Configuration profile settings were already processed just ignore them this time*/
1120 case 'd': /* Decode as rule */
1121 if (!add_decode_as(optarg))
1124 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1125 case 'K': /* Kerberos keytab file */
1126 read_keytab_file(optarg);
1129 case 'D': /* Print a list of capture devices and exit */
1131 if_list = capture_interface_list(&err, &err_str);
1132 if (if_list == NULL) {
1134 case CANT_GET_INTERFACE_LIST:
1135 cmdarg_err("%s", err_str);
1139 case NO_INTERFACES_FOUND:
1140 cmdarg_err("There are no interfaces on which a capture can be done");
1145 capture_opts_print_interfaces(if_list);
1146 free_interface_list(if_list);
1149 capture_option_specified = TRUE;
1155 output_fields_add(output_fields, optarg);
1159 if(!output_fields_set_option(output_fields, optarg)) {
1160 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1161 output_fields_list_options(stderr);
1166 out_file_type = wtap_short_string_to_file_type(optarg);
1167 if (out_file_type < 0) {
1168 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1169 list_capture_types();
1173 case 'W': /* Select extra information to save in our capture file */
1174 /* This is patterned after the -N flag which may not be the best idea. */
1175 if (strchr(optarg, 'n'))
1176 out_file_name_res = TRUE;
1178 case 'H': /* Read address to name mappings from a hosts file */
1179 if (! read_hosts_file(optarg))
1181 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1184 out_file_name_res = TRUE;
1187 case 'h': /* Print help and exit */
1191 case 'l': /* "Line-buffer" standard output */
1192 /* This isn't line-buffering, strictly speaking, it's just
1193 flushing the standard output after the information for
1194 each packet is printed; however, that should be good
1195 enough for all the purposes to which "-l" is put (and
1196 is probably actually better for "-V", as it does fewer
1199 See the comment in "process_packet()" for an explanation of
1200 why we do that, and why we don't just use "setvbuf()" to
1201 make the standard output line-buffered (short version: in
1202 Windows, "line-buffered" is the same as "fully-buffered",
1203 and the output buffer is only flushed when it fills up). */
1204 line_buffered = TRUE;
1206 case 'L': /* Print list of link-layer types and exit */
1208 list_link_layer_types = TRUE;
1210 capture_option_specified = TRUE;
1214 case 'n': /* No name resolution */
1215 gbl_resolv_flags = RESOLV_NONE;
1217 case 'N': /* Select what types of addresses/port #s to resolve */
1218 if (gbl_resolv_flags == RESOLV_ALL)
1219 gbl_resolv_flags = RESOLV_NONE;
1220 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1221 if (badopt != '\0') {
1222 cmdarg_err("-N specifies unknown resolving option '%c';",
1224 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1228 case 'o': /* Override preference from command line */
1229 switch (prefs_set_pref(optarg)) {
1234 case PREFS_SET_SYNTAX_ERR:
1235 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1239 case PREFS_SET_NO_SUCH_PREF:
1240 case PREFS_SET_OBSOLETE:
1241 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1246 case 'q': /* Quiet */
1249 case 'r': /* Read capture file x */
1250 cf_name = g_strdup(optarg);
1252 case 'R': /* Read file filter */
1255 case 'P': /* Print packets even when writing to a file */
1256 print_packet_info = TRUE;
1258 case 'S': /* Set the line Separator to be printed between packets */
1259 separator = strdup(optarg);
1261 case 't': /* Time stamp type */
1262 if (strcmp(optarg, "r") == 0)
1263 timestamp_set_type(TS_RELATIVE);
1264 else if (strcmp(optarg, "a") == 0)
1265 timestamp_set_type(TS_ABSOLUTE);
1266 else if (strcmp(optarg, "ad") == 0)
1267 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1268 else if (strcmp(optarg, "d") == 0)
1269 timestamp_set_type(TS_DELTA);
1270 else if (strcmp(optarg, "dd") == 0)
1271 timestamp_set_type(TS_DELTA_DIS);
1272 else if (strcmp(optarg, "e") == 0)
1273 timestamp_set_type(TS_EPOCH);
1274 else if (strcmp(optarg, "u") == 0)
1275 timestamp_set_type(TS_UTC);
1276 else if (strcmp(optarg, "ud") == 0)
1277 timestamp_set_type(TS_UTC_WITH_DATE);
1279 cmdarg_err("Invalid time stamp type \"%s\"",
1281 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1282 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1286 case 'T': /* printing Type */
1287 if (strcmp(optarg, "text") == 0) {
1288 output_action = WRITE_TEXT;
1289 print_format = PR_FMT_TEXT;
1290 } else if (strcmp(optarg, "ps") == 0) {
1291 output_action = WRITE_TEXT;
1292 print_format = PR_FMT_PS;
1293 } else if (strcmp(optarg, "pdml") == 0) {
1294 output_action = WRITE_XML;
1296 } else if (strcmp(optarg, "psml") == 0) {
1297 output_action = WRITE_XML;
1299 } else if(strcmp(optarg, "fields") == 0) {
1300 output_action = WRITE_FIELDS;
1301 verbose = TRUE; /* Need full tree info */
1303 cmdarg_err("Invalid -T parameter.");
1304 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1308 case 'u': /* Seconds type */
1309 if (strcmp(optarg, "s") == 0)
1310 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1311 else if (strcmp(optarg, "hms") == 0)
1312 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1314 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1315 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1319 case 'v': /* Show version and exit */
1321 GString *comp_info_str;
1322 GString *runtime_info_str;
1323 /* Assemble the compile-time version information string */
1324 comp_info_str = g_string_new("Compiled ");
1325 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1327 /* Assemble the run-time version information string */
1328 runtime_info_str = g_string_new("Running ");
1329 get_runtime_version_info(runtime_info_str, NULL);
1330 show_version(comp_info_str, runtime_info_str);
1331 g_string_free(comp_info_str, TRUE);
1332 g_string_free(runtime_info_str, TRUE);
1336 case 'O': /* Only output these protocols */
1337 output_only = g_strdup(optarg);
1339 case 'V': /* Verbose */
1341 /* The user asked for a verbose output, so let's ensure they get it,
1342 * even if they're writing to a file.
1344 print_packet_info = TRUE;
1346 case 'x': /* Print packet data in hex (and ASCII) */
1348 /* The user asked for hex output, so let's ensure they get it,
1349 * even if they're writing to a file.
1351 print_packet_info = TRUE;
1356 /* We won't call the init function for the stat this soon
1357 as it would disallow MATE's fields (which are registered
1358 by the preferences set callback) from being used as
1359 part of a tap filter. Instead, we just add the argument
1360 to a list of stat arguments. */
1361 if (!process_stat_cmd_arg(optarg)) {
1362 cmdarg_err("invalid -z argument.");
1363 cmdarg_err_cont(" -z argument must be one of :");
1364 list_stat_cmd_args();
1369 case '?': /* Bad flag - print usage message */
1372 list_capture_types();
1382 /* If we specified output fields, but not the output field type... */
1383 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1384 cmdarg_err("Output fields were specified with \"-e\", "
1385 "but \"-Tfields\" was not specified.");
1387 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1388 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1389 "specified with \"-e\".");
1394 /* If no capture filter or read filter has been specified, and there are
1395 still command-line arguments, treat them as the tokens of a capture
1396 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1397 flag was specified. */
1398 if (optind < argc) {
1399 if (cf_name != NULL) {
1400 if (rfilter != NULL) {
1401 cmdarg_err("Read filters were specified both with \"-R\" "
1402 "and with additional command-line arguments.");
1405 rfilter = get_args_as_string(argc, argv, optind);
1408 if (global_capture_opts.default_options.cfilter) {
1409 cmdarg_err("A default capture filter was specified both with \"-f\""
1410 " and with additional command-line arguments.");
1413 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1414 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1415 if (interface_opts.cfilter == NULL) {
1416 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1417 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1418 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1420 cmdarg_err("A capture filter was specified both with \"-f\""
1421 " and with additional command-line arguments.");
1425 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1427 capture_option_specified = TRUE;
1433 if (!global_capture_opts.saving_to_file) {
1434 /* We're not saving the capture to a file; if "-q" wasn't specified,
1435 we should print packet information */
1437 print_packet_info = TRUE;
1439 /* We're saving to a file; if we're writing to the standard output.
1440 and we'll also be writing dissected packets to the standard
1441 output, reject the request. At best, we could redirect that
1442 to the standard error; we *can't* write both to the standard
1443 output and have either of them be useful. */
1444 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1445 cmdarg_err("You can't write both raw packet data and dissected packets"
1446 " to the standard output.");
1451 /* We're not saving the capture to a file; if "-q" wasn't specified,
1452 we should print packet information */
1454 print_packet_info = TRUE;
1457 #ifndef HAVE_LIBPCAP
1458 if (capture_option_specified)
1459 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1466 /* We don't support capture filters when reading from a capture file
1467 (the BPF compiler doesn't support all link-layer types that we
1468 support in capture files we read). */
1470 if (cf_name != NULL) {
1471 if (global_capture_opts.default_options.cfilter) {
1472 cmdarg_err("Only read filters, not capture filters, "
1473 "can be specified when reading a capture file.");
1480 if (output_action != WRITE_TEXT) {
1481 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1486 if (output_only != NULL) {
1490 cmdarg_err("-O requires -V");
1494 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1495 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1496 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1501 if (list_link_layer_types) {
1502 /* We're supposed to list the link-layer types for an interface;
1503 did the user also specify a capture file to be read? */
1505 /* Yes - that's bogus. */
1506 cmdarg_err("You can't specify -L and a capture file to be read.");
1509 /* No - did they specify a ring buffer option? */
1510 if (global_capture_opts.multi_files_on) {
1511 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1517 * "-r" was specified, so we're reading a capture file.
1518 * Capture options don't apply here.
1520 if (global_capture_opts.multi_files_on) {
1521 cmdarg_err("Multiple capture files requested, but "
1522 "a capture isn't being done.");
1525 if (global_capture_opts.has_file_duration) {
1526 cmdarg_err("Switching capture files after a time interval was specified, but "
1527 "a capture isn't being done.");
1530 if (global_capture_opts.has_ring_num_files) {
1531 cmdarg_err("A ring buffer of capture files was specified, but "
1532 "a capture isn't being done.");
1535 if (global_capture_opts.has_autostop_files) {
1536 cmdarg_err("A maximum number of capture files was specified, but "
1537 "a capture isn't being done.");
1541 /* Note: TShark now allows the restriction of a _read_ file by packet count
1542 * and byte count as well as a write file. Other autostop options remain valid
1543 * only for a write file.
1545 if (global_capture_opts.has_autostop_duration) {
1546 cmdarg_err("A maximum capture time was specified, but "
1547 "a capture isn't being done.");
1552 * "-r" wasn't specified, so we're doing a live capture.
1554 if (global_capture_opts.saving_to_file) {
1555 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1557 /* When capturing, we only support writing pcap or pcap-ng format. */
1558 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1559 cmdarg_err("Live captures can only be saved in libpcap format.");
1562 if (global_capture_opts.multi_files_on) {
1563 /* Multiple-file mode doesn't work under certain conditions:
1564 a) it doesn't work if you're writing to the standard output;
1565 b) it doesn't work if you're writing to a pipe;
1567 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1568 cmdarg_err("Multiple capture files requested, but "
1569 "the capture is being written to the standard output.");
1572 if (global_capture_opts.output_to_pipe) {
1573 cmdarg_err("Multiple capture files requested, but "
1574 "the capture file is a pipe.");
1577 if (!global_capture_opts.has_autostop_filesize &&
1578 !global_capture_opts.has_file_duration) {
1579 cmdarg_err("Multiple capture files requested, but "
1580 "no maximum capture file size or duration was specified.");
1584 /* Currently, we don't support read filters when capturing
1585 and saving the packets. */
1586 if (rfilter != NULL) {
1587 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1591 /* They didn't specify a "-w" flag, so we won't be saving to a
1592 capture file. Check for options that only make sense if
1593 we're saving to a file. */
1594 if (global_capture_opts.has_autostop_filesize) {
1595 cmdarg_err("Maximum capture file size specified, but "
1596 "capture isn't being saved to a file.");
1599 if (global_capture_opts.multi_files_on) {
1600 cmdarg_err("Multiple capture files requested, but "
1601 "the capture isn't being saved to a file.");
1610 /* Start windows sockets */
1611 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1614 /* Notify all registered modules that have had any of their preferences
1615 changed either from one of the preferences file or from the command
1616 line that their preferences have changed. */
1619 /* At this point MATE will have registered its field array so we can
1620 have a tap filter with one of MATE's late-registered fields as part
1621 of the filter. We can now process all the "-z" arguments. */
1622 start_requested_stats();
1625 /* We currently don't support taps, or printing dissected packets,
1626 if we're writing to a pipe. */
1627 if (global_capture_opts.saving_to_file &&
1628 global_capture_opts.output_to_pipe) {
1629 if (tap_listeners_require_dissection()) {
1630 cmdarg_err("Taps aren't supported when saving to a pipe.");
1633 if (print_packet_info) {
1634 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1640 /* disabled protocols as per configuration file */
1641 if (gdp_path == NULL && dp_path == NULL) {
1642 set_disabled_protos_list();
1645 /* Build the column format array */
1646 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1649 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1650 capture_opts_trim_ring_num_files(&global_capture_opts);
1653 if (rfilter != NULL) {
1654 if (!dfilter_compile(rfilter, &rfcode)) {
1655 cmdarg_err("%s", dfilter_error_msg);
1657 #ifdef HAVE_PCAP_OPEN_DEAD
1661 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1663 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1665 " Note: That display filter code looks like a valid capture filter;");
1667 " maybe you mixed them up?");
1676 cfile.rfcode = rfcode;
1678 if (print_packet_info) {
1679 /* If we're printing as text or PostScript, we have
1680 to create a print stream. */
1681 if (output_action == WRITE_TEXT) {
1682 switch (print_format) {
1685 print_stream = print_stream_text_stdio_new(stdout);
1689 print_stream = print_stream_ps_stdio_new(stdout);
1693 g_assert_not_reached();
1698 /* We have to dissect each packet if:
1700 we're printing information about each packet;
1702 we're using a read filter on the packets;
1704 we're using any taps that need dissection. */
1705 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1709 * We're reading a capture file.
1713 * Immediately relinquish any special privileges we have; we must not
1714 * be allowed to read any capture files the user running TShark
1717 relinquish_special_privs_perm();
1718 print_current_user();
1720 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1725 /* Set timestamp precision; there should arguably be a command-line
1726 option to let the user set this. */
1727 switch(wtap_file_tsprecision(cfile.wth)) {
1728 case(WTAP_FILE_TSPREC_SEC):
1729 timestamp_set_precision(TS_PREC_AUTO_SEC);
1731 case(WTAP_FILE_TSPREC_DSEC):
1732 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1734 case(WTAP_FILE_TSPREC_CSEC):
1735 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1737 case(WTAP_FILE_TSPREC_MSEC):
1738 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1740 case(WTAP_FILE_TSPREC_USEC):
1741 timestamp_set_precision(TS_PREC_AUTO_USEC);
1743 case(WTAP_FILE_TSPREC_NSEC):
1744 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1747 g_assert_not_reached();
1750 /* Process the packets in the file */
1753 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1754 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1755 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1757 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1760 CATCH(OutOfMemoryError) {
1764 "Sorry, but TShark has to terminate now!\n"
1766 "Some infos / workarounds can be found at:\n"
1767 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1772 /* We still dump out the results of taps, etc., as we might have
1773 read some packets; however, we exit with an error status. */
1777 /* No capture file specified, so we're supposed to do a live capture
1778 (or get a list of link-layer types for a live capture device);
1779 do we have support for live captures? */
1786 cmdarg_err("WinPcap couldn't be found.");
1787 detailed_err = cant_load_winpcap_err("TShark");
1788 cmdarg_err_cont("%s", detailed_err);
1789 g_free(detailed_err);
1794 /* trim the interface name and exit if that failed */
1795 if (!capture_opts_trim_iface(&global_capture_opts,
1796 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1800 /* if requested, list the link layer types and exit */
1801 if (list_link_layer_types) {
1803 interface_options interface_opts;
1805 /* Get the list of link-layer types for the capture devices. */
1806 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1807 if_capabilities_t *caps;
1809 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1810 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1812 cmdarg_err("%s", err_str);
1816 if (caps->data_link_types == NULL) {
1817 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1820 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1821 free_if_capabilities(caps);
1826 if (print_packet_info) {
1827 if (!write_preamble(NULL)) {
1828 show_print_file_io_error(errno);
1831 } else if (!quiet) {
1833 * We're not printing information for each packet, and the user
1834 * didn't ask us not to print a count of packets as they arrive,
1835 * so print that count so the user knows that packets are arriving.
1837 * XXX - what if the user wants to do a live capture, doesn't want
1838 * to save it to a file, doesn't want information printed for each
1839 * packet, does want some "-z" statistic, and wants packet counts
1840 * so they know whether they're seeing any packets?
1842 print_packet_counts = TRUE;
1845 /* For now, assume libpcap gives microsecond precision. */
1846 timestamp_set_precision(TS_PREC_AUTO_USEC);
1849 * XXX - this returns FALSE if an error occurred, but it also
1850 * returns FALSE if the capture stops because a time limit
1851 * was reached (and possibly other limits), so we can't assume
1852 * it means an error.
1854 * The capture code is a bit twisty, so it doesn't appear to
1855 * be an easy fix. We just ignore the return value for now.
1856 * Instead, pass on the exit status from the capture child.
1859 exit_status = global_capture_opts.fork_child_status;
1861 if (print_packet_info) {
1862 if (!write_finale()) {
1864 show_print_file_io_error(err);
1868 /* No - complain. */
1869 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1876 if (cfile.frames != NULL) {
1877 free_frame_data_sequence(cfile.frames);
1878 cfile.frames = NULL;
1881 draw_tap_listeners(TRUE);
1882 funnel_dump_all_text_windows();
1885 output_fields_free(output_fields);
1886 output_fields = NULL;
1891 /*#define USE_BROKEN_G_MAIN_LOOP*/
1893 #ifdef USE_BROKEN_G_MAIN_LOOP
1896 gboolean loop_running = FALSE;
1898 guint32 packet_count = 0;
1901 /* XXX - move to the right position / file */
1902 /* read from a pipe (callback) */
1903 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1905 typedef struct pipe_input_tag {
1909 pipe_input_cb_t input_cb;
1910 guint pipe_input_id;
1912 GMutex *callback_running;
1916 static pipe_input_t pipe_input;
1919 /* The timer has expired, see if there's stuff to read from the pipe,
1920 if so, do the callback */
1922 pipe_timer_cb(gpointer data)
1926 gboolean result, result1;
1928 pipe_input_t *pipe_input_p = data;
1929 gint iterations = 0;
1931 g_mutex_lock (pipe_input_p->callback_running);
1933 /* try to read data from the pipe only 5 times, to avoid blocking */
1934 while(iterations < 5) {
1935 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1937 /* Oddly enough although Named pipes don't work on win9x,
1938 PeekNamedPipe does !!! */
1939 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1940 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1942 /* Get the child process exit status */
1943 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1946 /* If the Peek returned an error, or there are bytes to be read
1947 or the childwatcher thread has terminated then call the normal
1949 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1951 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1953 /* And call the real handler */
1954 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1955 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1956 /* pipe closed, return false so that the timer is stopped */
1957 g_mutex_unlock (pipe_input_p->callback_running);
1962 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1963 /* No data, stop now */
1970 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1972 g_mutex_unlock (pipe_input_p->callback_running);
1974 /* we didn't stopped the timer, so let it run */
1981 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1984 pipe_input.source = source;
1985 pipe_input.child_process = child_process;
1986 pipe_input.user_data = user_data;
1987 pipe_input.input_cb = input_cb;
1990 #if GLIB_CHECK_VERSION(2,31,0)
1991 pipe_input.callback_running = g_malloc(sizeof(GMutex));
1992 g_mutex_init(pipe_input.callback_running);
1994 pipe_input.callback_running = g_mutex_new();
1996 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1997 do this but that doesn't cover all win32 platforms. GTK can do
1998 this but doesn't seem to work over processes. Attempt to do
1999 something similar here, start a timer and check for data on every
2001 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2002 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2013 GString *str = g_string_new("");
2014 #ifdef USE_TSHARK_SELECT
2018 struct sigaction action, oldaction;
2022 * XXX - dropping privileges is still required, until code cleanup is done
2024 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2025 * when it's done, we don't need special privileges to run tshark at all,
2026 * therefore we don't need to drop these privileges
2027 * The only thing we might want to keep is a warning if tshark is run as root,
2028 * as it's no longer necessary and potentially dangerous.
2030 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2031 * We've opened the capture device, so we shouldn't need any special
2032 * privileges any more; relinquish those privileges.
2034 * XXX - if we have saved set-user-ID support, we should give up those
2035 * privileges immediately, and then reclaim them long enough to get
2036 * a list of network interfaces and to open one, and then give them
2037 * up again, so that stuff we do while processing the argument list,
2038 * reading the user's preferences, loading and starting plugins
2039 * (especially *user* plugins), etc. is done with the user's privileges,
2040 * not special privileges.
2042 relinquish_special_privs_perm();
2043 print_current_user();
2045 /* Cleanup all data structures used for dissection. */
2046 cleanup_dissection();
2047 /* Initialize all data structures used for dissection. */
2051 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2052 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2054 /* Catch SIGINT and SIGTERM and, if we get either of them,
2055 clean up and exit. If SIGHUP isn't being ignored, catch
2056 it too and, if we get it, clean up and exit.
2058 We restart any read that was in progress, so that it doesn't
2059 disrupt reading from the sync pipe. The signal handler tells
2060 the capture child to finish; it will report that it finished,
2061 or will exit abnormally, so we'll stop reading from the sync
2062 pipe, pick up the exit status, and quit. */
2063 action.sa_handler = capture_cleanup;
2064 action.sa_flags = SA_RESTART;
2065 sigemptyset(&action.sa_mask);
2066 sigaction(SIGTERM, &action, NULL);
2067 sigaction(SIGINT, &action, NULL);
2068 sigaction(SIGHUP, NULL, &oldaction);
2069 if (oldaction.sa_handler == SIG_DFL)
2070 sigaction(SIGHUP, &action, NULL);
2073 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2074 quiet mode, report the number of packets we've captured.
2076 Again, restart any read that was in progress, so that it doesn't
2077 disrupt reading from the sync pipe. */
2078 action.sa_handler = report_counts_siginfo;
2079 action.sa_flags = SA_RESTART;
2080 sigemptyset(&action.sa_mask);
2081 sigaction(SIGINFO, &action, NULL);
2082 #endif /* SIGINFO */
2085 global_capture_opts.state = CAPTURE_PREPARING;
2087 /* Let the user know which interfaces were chosen. */
2088 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2089 interface_options interface_opts;
2091 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2092 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2093 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2094 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2097 if (global_capture_opts.ifaces->len < 2) {
2099 if (global_capture_opts.ifaces->len < 4) {
2101 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2102 interface_options interface_opts;
2104 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2106 if (global_capture_opts.ifaces->len > 2) {
2107 g_string_append_printf(str, ",");
2109 g_string_append_printf(str, " ");
2110 if (i == global_capture_opts.ifaces->len - 1) {
2111 g_string_append_printf(str, "and ");
2114 g_string_append_printf(str, "%s", interface_opts.descr);
2117 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2119 fprintf(stderr, "Capturing on %s\n", str->str);
2120 g_string_free(str, TRUE);
2122 ret = sync_pipe_start(&global_capture_opts);
2127 /* the actual capture loop
2129 * XXX - glib doesn't seem to provide any event based loop handling.
2131 * XXX - for whatever reason,
2132 * calling g_main_loop_new() ends up in 100% cpu load.
2134 * But that doesn't matter: in UNIX we can use select() to find an input
2135 * source with something to do.
2137 * But that doesn't matter because we're in a CLI (that doesn't need to
2138 * update a GUI or something at the same time) so it's OK if we block
2139 * trying to read from the pipe.
2141 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2142 * wrong (but I leave it there in case I am...).
2145 #ifdef USE_TSHARK_SELECT
2147 FD_SET(pipe_input.source, &readfds);
2150 loop_running = TRUE;
2154 while (loop_running)
2156 #ifdef USE_TSHARK_SELECT
2157 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2163 } else if (ret == 1) {
2165 /* Call the real handler */
2166 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2167 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2170 #ifdef USE_TSHARK_SELECT
2175 CATCH(OutOfMemoryError) {
2179 "Sorry, but TShark has to terminate now!\n"
2181 "Some infos / workarounds can be found at:\n"
2182 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2190 /* XXX - move the call to main_window_update() out of capture_sync.c */
2191 /* dummy for capture_sync.c to make linker happy */
2192 void main_window_update(void)
2196 /* capture child detected an error */
2198 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2200 cmdarg_err("%s", error_msg);
2201 cmdarg_err_cont("%s", secondary_error_msg);
2205 /* capture child detected an capture filter related error */
2207 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2209 dfilter_t *rfcode = NULL;
2210 interface_options interface_opts;
2212 g_assert(i < capture_opts->ifaces->len);
2213 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2215 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2217 "Invalid capture filter \"%s\" for interface %s!\n"
2219 "That string looks like a valid display filter; however, it isn't a valid\n"
2220 "capture filter (%s).\n"
2222 "Note that display filters and capture filters don't have the same syntax,\n"
2223 "so you can't use most display filter expressions as capture filters.\n"
2225 "See the User's Guide for a description of the capture filter syntax.",
2226 interface_opts.cfilter, interface_opts.descr, error_message);
2227 dfilter_free(rfcode);
2230 "Invalid capture filter \"%s\" for interface %s!\n"
2232 "That string isn't a valid capture filter (%s).\n"
2233 "See the User's Guide for a description of the capture filter syntax.",
2234 interface_opts.cfilter, interface_opts.descr, error_message);
2239 /* capture child tells us we have a new (or the first) capture file */
2241 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2243 gboolean is_tempfile;
2246 if(capture_opts->state == CAPTURE_PREPARING) {
2247 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2249 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2251 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2253 /* free the old filename */
2254 if (capture_opts->save_file != NULL) {
2256 /* we start a new capture file, close the old one (if we had one before) */
2257 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2258 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2259 wtap_close(((capture_file *) capture_opts->cf)->wth);
2261 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2264 g_free(capture_opts->save_file);
2265 is_tempfile = FALSE;
2267 /* we didn't had a save_file before, must be a tempfile */
2271 /* save the new filename */
2272 capture_opts->save_file = g_strdup(new_file);
2274 /* if we are in real-time mode, open the new file now */
2276 /* Attempt to open the capture file and set up to read from it. */
2277 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2281 /* Don't unlink (delete) the save file - leave it around,
2282 for debugging purposes. */
2283 g_free(capture_opts->save_file);
2284 capture_opts->save_file = NULL;
2289 capture_opts->state = CAPTURE_RUNNING;
2295 /* capture child tells us we have new packets to read */
2297 capture_input_new_packets(capture_options *capture_opts, int to_read)
2303 capture_file *cf = capture_opts->cf;
2304 gboolean filtering_tap_listeners;
2309 * Prevent a SIGINFO handler from writing to the standard error while
2310 * we're doing so or writing to the standard output; instead, have it
2311 * just set a flag telling us to print that information when we're done.
2314 #endif /* SIGINFO */
2316 /* Do we have any tap listeners with filters? */
2317 filtering_tap_listeners = have_filtering_tap_listeners();
2319 /* Get the union of the flags for all tap listeners. */
2320 tap_flags = union_of_tap_listener_flags();
2323 while (to_read-- && cf->wth) {
2324 wtap_cleareof(cf->wth);
2325 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2327 /* read from file failed, tell the capture child to stop */
2328 sync_pipe_stop(capture_opts);
2329 wtap_close(cf->wth);
2332 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2333 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2334 filtering_tap_listeners, tap_flags);
2337 /* packet successfully read and gone through the "Read Filter" */
2343 * Dumpcap's doing all the work; we're not doing any dissection.
2344 * Count all the packets it wrote.
2346 packet_count += to_read;
2349 if (print_packet_counts) {
2350 /* We're printing packet counts. */
2351 if (packet_count != 0) {
2352 fprintf(stderr, "\r%u ", packet_count);
2353 /* stderr could be line buffered */
2360 * Allow SIGINFO handlers to write.
2365 * If a SIGINFO handler asked us to write out capture counts, do so.
2369 #endif /* SIGINFO */
2375 if (!print_packet_counts) {
2376 /* Report the count only if we aren't printing a packet count
2377 as packets arrive. */
2378 fprintf(stderr, "%u packet%s captured\n", packet_count,
2379 plurality(packet_count, "", "s"));
2382 infoprint = FALSE; /* we just reported it */
2383 #endif /* SIGINFO */
2388 report_counts_siginfo(int signum _U_)
2390 int sav_errno = errno;
2391 /* If we've been told to delay printing, just set a flag asking
2392 that we print counts (if we're supposed to), otherwise print
2393 the count of packets captured (if we're supposed to). */
2400 #endif /* SIGINFO */
2403 /* capture child detected any packet drops? */
2405 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2407 if (print_packet_counts) {
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, "\n");
2414 /* We're printing packet counts to stderr.
2415 Send a newline so that we move to the line after the packet count. */
2416 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2422 * Capture child closed its side of the pipe, report any error and
2423 * do the required cleanup.
2426 capture_input_closed(capture_options *capture_opts, gchar *msg)
2429 fprintf(stderr, "tshark: %s\n", msg);
2433 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2434 wtap_close(((capture_file *) capture_opts->cf)->wth);
2435 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2436 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2439 #ifdef USE_BROKEN_G_MAIN_LOOP
2440 /*g_main_loop_quit(loop);*/
2443 loop_running = FALSE;
2452 capture_cleanup(DWORD ctrltype _U_)
2454 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2455 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2456 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2457 like SIGTERM at least when the machine's shutting down.
2459 For now, we handle them all as indications that we should clean up
2460 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2463 We must return TRUE so that no other handler - such as one that would
2464 terminate the process - gets called.
2466 XXX - for some reason, typing ^C to TShark, if you run this in
2467 a Cygwin console window in at least some versions of Cygwin,
2468 causes TShark to terminate immediately; this routine gets
2469 called, but the main loop doesn't get a chance to run and
2470 exit cleanly, at least if this is compiled with Microsoft Visual
2471 C++ (i.e., it's a property of the Cygwin console window or Bash;
2472 it happens if TShark is not built with Cygwin - for all I know,
2473 building it with Cygwin may make the problem go away). */
2475 /* tell the capture child to stop */
2476 sync_pipe_stop(&global_capture_opts);
2478 /* don't stop our own loop already here, otherwise status messages and
2479 * cleanup wouldn't be done properly. The child will indicate the stop of
2480 * everything by calling capture_input_closed() later */
2486 capture_cleanup(int signum _U_)
2488 /* tell the capture child to stop */
2489 sync_pipe_stop(&global_capture_opts);
2491 /* don't stop our own loop already here, otherwise status messages and
2492 * cleanup wouldn't be done properly. The child will indicate the stop of
2493 * everything by calling capture_input_closed() later */
2496 #endif /* HAVE_LIBPCAP */
2499 process_packet_first_pass(capture_file *cf,
2500 gint64 offset, const struct wtap_pkthdr *whdr,
2501 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2508 /* The frame number of this packet is one more than the count of
2509 frames in this packet. */
2510 framenum = cf->count + 1;
2512 /* If we're not running a display filter and we're not printing any
2513 packet information, we don't need to do a dissection. This means
2514 that all packets can be marked as 'passed'. */
2517 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2519 /* If we're going to print packet information, or we're going to
2520 run a read filter, or we're going to process taps, set up to
2521 do a dissection and do so. */
2522 if (do_dissection) {
2523 if (gbl_resolv_flags)
2524 /* Grab any resolved addresses */
2525 host_name_lookup_process(NULL);
2527 /* The protocol tree will be "visible", i.e., printed, only if we're
2528 printing packet details, which is true if we're printing stuff
2529 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2531 epan_dissect_init(&edt, FALSE, FALSE);
2533 /* If we're running a read filter, prime the epan_dissect_t with that
2536 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2538 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2539 &first_ts, &prev_dis_ts, &prev_cap_ts);
2541 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2543 /* Run the read filter if we have one. */
2545 passed = dfilter_apply_edt(cf->rfcode, &edt);
2549 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2550 frame_data_sequence_add(cf->frames, &fdlocal);
2555 epan_dissect_cleanup(&edt);
2561 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2562 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2563 gboolean filtering_tap_listeners, guint tap_flags)
2565 gboolean create_proto_tree;
2570 /* If we're not running a display filter and we're not printing any
2571 packet information, we don't need to do a dissection. This means
2572 that all packets can be marked as 'passed'. */
2575 /* If we're going to print packet information, or we're going to
2576 run a read filter, or we're going to process taps, set up to
2577 do a dissection and do so. */
2578 if (do_dissection) {
2579 if (gbl_resolv_flags)
2580 /* Grab any resolved addresses */
2581 host_name_lookup_process(NULL);
2583 if (cf->rfcode || verbose || filtering_tap_listeners ||
2584 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2585 create_proto_tree = TRUE;
2587 create_proto_tree = FALSE;
2589 /* The protocol tree will be "visible", i.e., printed, only if we're
2590 printing packet details, which is true if we're printing stuff
2591 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2593 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2595 /* If we're running a read filter, prime the epan_dissect_t with that
2598 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2600 col_custom_prime_edt(&edt, &cf->cinfo);
2602 tap_queue_init(&edt);
2604 /* We only need the columns if either
2606 1) some tap needs the columns
2610 2) we're printing packet info but we're *not* verbose; in verbose
2611 mode, we print the protocol tree, not the protocol summary. */
2612 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2617 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2619 tap_push_tapped_queue(&edt);
2621 /* Run the read filter if we have one. */
2623 passed = dfilter_apply_edt(cf->rfcode, &edt);
2627 /* Process this packet. */
2628 if (print_packet_info) {
2629 /* We're printing packet information; print the information for
2632 print_packet(cf, &edt);
2634 print_packet(cf, NULL);
2636 /* The ANSI C standard does not appear to *require* that a line-buffered
2637 stream be flushed to the host environment whenever a newline is
2638 written, it just says that, on such a stream, characters "are
2639 intended to be transmitted to or from the host environment as a
2640 block when a new-line character is encountered".
2642 The Visual C++ 6.0 C implementation doesn't do what is intended;
2643 even if you set a stream to be line-buffered, it still doesn't
2644 flush the buffer at the end of every line.
2646 So, if the "-l" flag was specified, we flush the standard output
2647 at the end of a packet. This will do the right thing if we're
2648 printing packet summary lines, and, as we print the entire protocol
2649 tree for a single packet without waiting for anything to happen,
2650 it should be as good as line-buffered mode if we're printing
2651 protocol trees. (The whole reason for the "-l" flag in either
2652 tcpdump or TShark is to allow the output of a live capture to
2653 be piped to a program or script and to have that script see the
2654 information for the packet as soon as it's printed, rather than
2655 having to wait until a standard I/O buffer fills up. */
2659 if (ferror(stdout)) {
2660 show_print_file_io_error(errno);
2666 if (do_dissection) {
2667 epan_dissect_cleanup(&edt);
2673 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2674 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2677 int snapshot_length;
2681 gchar *err_info = NULL;
2683 char *save_file_string = NULL;
2684 gboolean filtering_tap_listeners;
2687 #ifdef PCAP_NG_DEFAULT
2688 linktype = WTAP_ENCAP_PER_PACKET;
2690 linktype = wtap_file_encap(cf->wth);
2692 if (save_file != NULL) {
2693 /* Get a string that describes what we're writing to */
2694 save_file_string = output_file_description(save_file);
2696 /* Set up to write to the capture file. */
2697 snapshot_length = wtap_snapshot_length(cf->wth);
2698 if (snapshot_length == 0) {
2699 /* Snapshot length of input file not known. */
2700 snapshot_length = WTAP_MAX_PACKET_SIZE;
2702 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2703 FALSE /* compressed */, &err);
2706 /* We couldn't set up to write to the capture file. */
2709 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2710 cmdarg_err("Capture files can't be written in that format.");
2713 case WTAP_ERR_UNSUPPORTED_ENCAP:
2714 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2715 cmdarg_err("The capture file being read can't be written as a "
2716 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2719 case WTAP_ERR_CANT_OPEN:
2720 cmdarg_err("The %s couldn't be created for some "
2721 "unknown reason.", save_file_string);
2724 case WTAP_ERR_SHORT_WRITE:
2725 cmdarg_err("A full header couldn't be written to the %s.",
2730 cmdarg_err("The %s could not be created: %s.", save_file_string,
2731 wtap_strerror(err));
2737 if (print_packet_info) {
2738 if (!write_preamble(cf)) {
2740 show_print_file_io_error(err);
2747 if (pdh && out_file_name_res) {
2748 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2749 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2750 wtap_file_type_short_string(out_file_type));
2754 /* Do we have any tap listeners with filters? */
2755 filtering_tap_listeners = have_filtering_tap_listeners();
2757 /* Get the union of the flags for all tap listeners. */
2758 tap_flags = union_of_tap_listener_flags();
2760 if (perform_two_pass_analysis) {
2762 int old_max_packet_count = max_packet_count;
2764 /* Allocate a frame_data_sequence for all the frames. */
2765 cf->frames = new_frame_data_sequence();
2767 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2768 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2769 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2770 /* Stop reading if we have the maximum number of packets;
2771 * When the -c option has not been used, max_packet_count
2772 * starts at 0, which practically means, never stop reading.
2773 * (unless we roll over max_packet_count ?)
2775 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2776 err = 0; /* This is not an error */
2782 /* Close the sequential I/O side, to free up memory it requires. */
2783 wtap_sequential_close(cf->wth);
2785 /* Allow the protocol dissectors to free up memory that they
2786 * don't need after the sequential run-through of the packets. */
2787 postseq_cleanup_all_protocols();
2789 max_packet_count = old_max_packet_count;
2791 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2792 fdata = frame_data_sequence_find(cf->frames, framenum);
2793 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2794 cf->pd, fdata->cap_len, &err, &err_info)) {
2795 if (process_packet_second_pass(cf, fdata,
2796 &cf->pseudo_header, cf->pd,
2797 filtering_tap_listeners, tap_flags)) {
2798 /* Either there's no read filtering or this packet passed the
2799 filter, so, if we're writing to a capture file, write
2802 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2803 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2805 /* Error writing to a capture file */
2808 case WTAP_ERR_UNSUPPORTED_ENCAP:
2810 * This is a problem with the particular frame we're writing;
2811 * note that, and give the frame number.
2813 * XXX - framenum is not necessarily the frame number in
2814 * the input file if there was a read filter.
2817 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2818 framenum, cf->filename,
2819 wtap_file_type_short_string(out_file_type));
2823 show_capture_file_io_error(save_file, err, FALSE);
2826 wtap_dump_close(pdh, &err);
2830 /* Stop reading if we have the maximum number of packets;
2831 * When the -c option has not been used, max_packet_count
2832 * starts at 0, which practically means, never stop reading.
2833 * (unless we roll over max_packet_count ?)
2835 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2836 err = 0; /* This is not an error */
2845 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2848 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2849 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2850 filtering_tap_listeners, tap_flags)) {
2851 /* Either there's no read filtering or this packet passed the
2852 filter, so, if we're writing to a capture file, write
2855 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2856 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2858 /* Error writing to a capture file */
2861 case WTAP_ERR_UNSUPPORTED_ENCAP:
2863 * This is a problem with the particular frame we're writing;
2864 * note that, and give the frame number.
2867 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2868 framenum, cf->filename,
2869 wtap_file_type_short_string(out_file_type));
2873 show_capture_file_io_error(save_file, err, FALSE);
2876 wtap_dump_close(pdh, &err);
2880 /* Stop reading if we have the maximum number of packets;
2881 * When the -c option has not been used, max_packet_count
2882 * starts at 0, which practically means, never stop reading.
2883 * (unless we roll over max_packet_count ?)
2885 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2886 err = 0; /* This is not an error */
2895 * Print a message noting that the read failed somewhere along the line.
2897 * If we're printing packet data, and the standard output and error are
2898 * going to the same place, flush the standard output, so everything
2899 * buffered up is written, and then print a newline to the standard error
2900 * before printing the error message, to separate it from the packet
2901 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2902 * the _fstat() documentation at Microsoft doesn't indicate whether
2903 * st_ino is even supported.)
2906 if (print_packet_info) {
2907 struct stat stat_stdout, stat_stderr;
2909 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2910 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2911 stat_stdout.st_ino == stat_stderr.st_ino) {
2913 fprintf(stderr, "\n");
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_RECORD:
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_FILE_UNKNOWN_FORMAT:
3627 /* Seen only when opening a capture file for reading. */
3628 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3631 case WTAP_ERR_UNSUPPORTED:
3632 /* Seen only when opening a capture file for reading. */
3633 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3634 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3637 errmsg = errmsg_errno;
3640 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3641 /* Seen only when opening a capture file for writing. */
3642 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3643 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3644 "written to a pipe.", wtap_file_type_short_string(file_type));
3645 errmsg = errmsg_errno;
3648 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3649 /* Seen only when opening a capture file for writing. */
3650 errmsg = "TShark doesn't support writing capture files in that format.";
3653 case WTAP_ERR_UNSUPPORTED_ENCAP:
3655 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3656 "TShark can't save this capture as a \"%s\" file.",
3657 wtap_file_type_short_string(file_type));
3659 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3660 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3664 errmsg = errmsg_errno;
3667 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3669 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3670 "TShark can't save this capture as a \"%s\" file.",
3671 wtap_file_type_short_string(file_type));
3672 errmsg = errmsg_errno;
3674 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3677 case WTAP_ERR_BAD_RECORD:
3678 /* Seen only when opening a capture file for reading. */
3679 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3680 "The file \"%%s\" appears to be damaged or corrupt.\n"
3683 errmsg = errmsg_errno;
3686 case WTAP_ERR_CANT_OPEN:
3688 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3690 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3693 case WTAP_ERR_SHORT_READ:
3694 errmsg = "The file \"%s\" appears to have been cut short"
3695 " in the middle of a packet or other data.";
3698 case WTAP_ERR_SHORT_WRITE:
3699 errmsg = "A full header couldn't be written to the file \"%s\".";
3702 case WTAP_ERR_DECOMPRESS:
3703 /* Seen only when opening a capture file for reading. */
3704 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3705 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3708 errmsg = errmsg_errno;
3712 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3713 "The file \"%%s\" could not be %s: %s.",
3714 for_writing ? "created" : "opened",
3715 wtap_strerror(err));
3716 errmsg = errmsg_errno;
3720 errmsg = file_open_error_message(err, for_writing);
3725 * Open/create errors are reported with an console message in TShark.
3728 open_failure_message(const char *filename, int err, gboolean for_writing)
3730 fprintf(stderr, "tshark: ");
3731 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3732 fprintf(stderr, "\n");
3737 * General errors are reported with an console message in TShark.
3740 failure_message(const char *msg_format, va_list ap)
3742 fprintf(stderr, "tshark: ");
3743 vfprintf(stderr, msg_format, ap);
3744 fprintf(stderr, "\n");
3748 * Read errors are reported with an console message in TShark.
3751 read_failure_message(const char *filename, int err)
3753 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3754 filename, g_strerror(err));
3758 * Write errors are reported with an console message in TShark.
3761 write_failure_message(const char *filename, int err)
3763 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3764 filename, g_strerror(err));
3768 * Print to the standard error. This is a command-line tool, so there's
3769 * no need to pop up a console.
3772 vfprintf_stderr(const char *fmt, va_list ap)
3774 vfprintf(stderr, fmt, ap);
3778 fprintf_stderr(const char *fmt, ...)
3783 vfprintf_stderr(fmt, ap);
3788 * Report an error in command-line arguments.
3791 cmdarg_err(const char *fmt, ...)
3796 failure_message(fmt, ap);
3801 * Report additional information for an error in command-line arguments.
3804 cmdarg_err_cont(const char *fmt, ...)
3809 vfprintf(stderr, fmt, ap);
3810 fprintf(stderr, "\n");