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;
138 * TRUE if we're to print packet counts to keep track of captured packets.
140 static gboolean print_packet_counts;
143 static capture_options global_capture_opts;
146 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
147 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
150 static gboolean capture(void);
151 static void report_counts(void);
153 static BOOL WINAPI capture_cleanup(DWORD);
155 static void capture_cleanup(int);
157 static void report_counts_siginfo(int);
160 #endif /* HAVE_LIBPCAP */
162 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
163 static gboolean process_packet(capture_file *cf, gint64 offset,
164 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
165 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
166 static void show_capture_file_io_error(const char *, int, gboolean);
167 static void show_print_file_io_error(int err);
168 static gboolean write_preamble(capture_file *cf);
169 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
170 static gboolean write_finale(void);
171 static const char *cf_open_error_message(int err, gchar *err_info,
172 gboolean for_writing, int file_type);
174 static void open_failure_message(const char *filename, int err,
175 gboolean for_writing);
176 static void failure_message(const char *msg_format, va_list ap);
177 static void read_failure_message(const char *filename, int err);
178 static void write_failure_message(const char *filename, int err);
183 const char *sstr; /* The short string */
184 const char *lstr; /* The long string */
188 string_compare(gconstpointer a, gconstpointer b)
190 return strcmp(((const struct string_elem *)a)->sstr,
191 ((const struct string_elem *)b)->sstr);
195 string_elem_print(gpointer data, gpointer not_used _U_)
197 fprintf(stderr, " %s - %s\n",
198 ((struct string_elem *)data)->sstr,
199 ((struct string_elem *)data)->lstr);
203 list_capture_types(void) {
205 struct string_elem *captypes;
208 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
210 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
211 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
212 if (wtap_dump_can_open(i)) {
213 captypes[i].sstr = wtap_file_type_short_string(i);
214 captypes[i].lstr = wtap_file_type_string(i);
215 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
218 g_slist_foreach(list, string_elem_print, NULL);
224 print_usage(gboolean print_ver)
231 "TShark " VERSION "%s\n"
232 "Dump and analyze network traffic.\n"
233 "See http://www.wireshark.org for more information.\n"
236 wireshark_svnversion, get_copyright_info());
240 fprintf(output, "\n");
241 fprintf(output, "Usage: tshark [options] ...\n");
242 fprintf(output, "\n");
245 fprintf(output, "Capture interface:\n");
246 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
247 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
248 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
249 fprintf(output, " -p don't capture in promiscuous mode\n");
250 #ifdef HAVE_PCAP_CREATE
251 fprintf(output, " -I capture in monitor mode, if available\n");
253 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
254 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
256 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
257 fprintf(output, " -D print list of interfaces and exit\n");
258 fprintf(output, " -L print list of link-layer types of iface and exit\n");
259 fprintf(output, "\n");
260 fprintf(output, "Capture stop conditions:\n");
261 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
262 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
263 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
264 fprintf(output, " files:NUM - stop after NUM files\n");
265 /*fprintf(output, "\n");*/
266 fprintf(output, "Capture output:\n");
267 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
268 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
269 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
270 #endif /* HAVE_LIBPCAP */
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Input file:\n");
274 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
276 fprintf(output, "\n");
277 fprintf(output, "Processing:\n");
278 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
279 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
280 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
281 fprintf(output, " -d %s ...\n", decode_as_arg_template);
282 fprintf(output, " \"Decode As\", see the man page for details\n");
283 fprintf(output, " Example: tcp.port==8888,http\n");
285 /*fprintf(output, "\n");*/
286 fprintf(output, "Output:\n");
287 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
288 fprintf(output, " (or to the standard output for \"-\")\n");
289 fprintf(output, " -C <config profile> start with specified configuration profile\n");
290 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
291 fprintf(output, " an empty \"-F\" option will list the file types\n");
292 fprintf(output, " -V add output of packet tree (Packet Details)\n");
293 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
294 fprintf(output, " separated\n");
295 fprintf(output, " -S display packets even when writing to a file\n");
296 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
297 fprintf(output, " -T pdml|ps|psml|text|fields\n");
298 fprintf(output, " format of text output (def: text)\n");
299 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
300 fprintf(output, " this option can be repeated to print multiple fields\n");
301 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
302 fprintf(output, " header=y|n switch headers on and off\n");
303 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
304 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
305 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
306 fprintf(output, " aggregator\n");
307 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
308 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
309 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
310 fprintf(output, " -l flush standard output after each packet\n");
311 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
312 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
313 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
315 fprintf(output, "\n");
316 fprintf(output, "Miscellaneous:\n");
317 fprintf(output, " -h display this help and exit\n");
318 fprintf(output, " -v display version info and exit\n");
319 fprintf(output, " -o <name>:<value> ... override preference setting\n");
320 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
321 fprintf(output, " -G [report] dump one of several available reports and exit\n");
322 fprintf(output, " default report=\"fields\"\n");
323 fprintf(output, " use \"-G ?\" for more help\n");
327 glossary_option_help(void)
333 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
335 fprintf(output, "\n");
336 fprintf(output, "Usage: tshark -G [report]\n");
337 fprintf(output, "\n");
338 fprintf(output, "Glossary table reports:\n");
339 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
340 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
341 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
342 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
343 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
344 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
345 fprintf(output, "\n");
346 fprintf(output, "Preference reports:\n");
347 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
348 fprintf(output, " -G currentprefs dump current preferences and exit\n");
349 fprintf(output, "\n");
354 * For a dissector table, print on the stream described by output,
355 * its short name (which is what's used in the "-d" option) and its
359 display_dissector_table_names(const char *table_name, const char *ui_name,
362 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
366 * For a dissector handle, print on the stream described by output,
367 * the filter name (which is what's used in the "-d" option) and the full
368 * name for the protocol that corresponds to this handle.
371 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
374 const gchar* proto_filter_name;
375 const gchar* proto_ui_name;
377 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
379 if (proto_id != -1) {
380 proto_filter_name = proto_get_protocol_filter_name(proto_id);
381 proto_ui_name = proto_get_protocol_name(proto_id);
382 g_assert(proto_filter_name != NULL);
383 g_assert(proto_ui_name != NULL);
385 fprintf((FILE *)output, "\t%s (%s)\n",
392 * The protocol_name_search structure is used by find_protocol_name_func()
393 * to pass parameters and store results
395 struct protocol_name_search{
396 gchar *searched_name; /* Protocol filter name we are looking for */
397 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
398 guint nb_match; /* How many dissectors matched searched_name */
400 typedef struct protocol_name_search *protocol_name_search_t;
403 * This function parses all dissectors associated with a table to find the
404 * one whose protocol has the specified filter name. It is called
405 * as a reference function in a call to dissector_table_foreach_handle.
406 * The name we are looking for, as well as the results, are stored in the
407 * protocol_name_search struct pointed to by user_data.
408 * If called using dissector_table_foreach_handle, we actually parse the
409 * whole list of dissectors.
412 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
416 const gchar *protocol_filter_name;
417 protocol_name_search_t search_info;
421 search_info = (protocol_name_search_t)user_data;
423 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
424 if (proto_id != -1) {
425 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
426 g_assert(protocol_filter_name != NULL);
427 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
429 if (search_info->nb_match == 0) {
430 /* Record this handle only if this is the first match */
431 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
433 search_info->nb_match++;
439 * Print all layer type names supported.
440 * We send the output to the stream described by the handle output.
444 fprint_all_layer_types(FILE *output)
447 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
451 * Print all protocol names supported for a specific layer type.
452 * table_name contains the layer type name in which the search is performed.
453 * We send the output to the stream described by the handle output.
457 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
460 dissector_table_foreach_handle(table_name,
461 display_dissector_names,
466 * The function below parses the command-line parameters for the decode as
467 * feature (a string pointer by cl_param).
468 * It checks the format of the command-line, searches for a matching table
469 * and dissector. If a table/dissector match is not found, we display a
470 * summary of the available tables/dissectors (on stderr) and return FALSE.
471 * If everything is fine, we get the "Decode as" preference activated,
472 * then we return TRUE.
475 add_decode_as(const gchar *cl_param)
479 gchar *decoded_param;
480 gchar *remaining_param;
482 gchar *dissector_str;
483 dissector_handle_t dissector_matching;
484 dissector_table_t table_matching;
485 ftenum_t dissector_table_selector_type;
486 struct protocol_name_search user_protocol_name;
488 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
491 decoded_param = g_strdup(cl_param);
492 g_assert(decoded_param);
495 /* The lines below will parse this string (modifying it) to extract all
496 necessary information. Note that decoded_param is still needed since
497 strings are not copied - we just save pointers. */
499 /* This section extracts a layer type (table_name) from decoded_param */
500 table_name = decoded_param; /* Layer type string starts from beginning */
502 remaining_param = strchr(table_name, '=');
503 if (remaining_param == NULL) {
504 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
505 /* If the argument does not follow the template, carry on anyway to check
506 if the table name is at least correct. If remaining_param is NULL,
507 we'll exit anyway further down */
510 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
513 /* Remove leading and trailing spaces from the table name */
514 while ( table_name[0] == ' ' )
516 while ( table_name[strlen(table_name) - 1] == ' ' )
517 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
519 /* The following part searches a table matching with the layer type specified */
520 table_matching = NULL;
522 /* Look for the requested table */
523 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
524 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
527 table_matching = find_dissector_table(table_name);
528 if (!table_matching) {
529 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
533 if (!table_matching) {
534 /* Display a list of supported layer types to help the user, if the
535 specified layer type was not found */
536 cmdarg_err("Valid layer types are:");
537 fprint_all_layer_types(stderr);
539 if (remaining_param == NULL || !table_matching) {
540 /* Exit if the layer type was not found, or if no '=' separator was found
542 g_free(decoded_param);
546 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
547 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
550 remaining_param++; /* Move to the second '=' */
551 *remaining_param = '\0'; /* Remove the second '=' */
553 remaining_param++; /* Position after the layer type string */
555 /* This section extracts a selector value (selector_str) from decoded_param */
557 selector_str = remaining_param; /* Next part starts with the selector number */
559 remaining_param = strchr(selector_str, ',');
560 if (remaining_param == NULL) {
561 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
562 /* If the argument does not follow the template, carry on anyway to check
563 if the selector value is at least correct. If remaining_param is NULL,
564 we'll exit anyway further down */
567 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
570 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
572 switch (dissector_table_selector_type) {
578 /* The selector for this table is an unsigned number. Parse it as such.
579 There's no need to remove leading and trailing spaces from the
580 selector number string, because sscanf will do that for us. */
581 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
582 cmdarg_err("Invalid selector number \"%s\"", selector_str);
583 g_free(decoded_param);
590 /* The selector for this table is a string. */
594 /* There are currently no dissector tables with any types other
595 than the ones listed above. */
596 g_assert_not_reached();
599 if (remaining_param == NULL) {
600 /* Exit if no ',' separator was found (see above) */
601 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
602 fprint_all_protocols_for_layer_types(stderr, table_name);
603 g_free(decoded_param);
607 remaining_param++; /* Position after the selector number string */
609 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
611 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
613 /* Remove leading and trailing spaces from the dissector name */
614 while ( dissector_str[0] == ' ' )
616 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
617 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
619 dissector_matching = NULL;
621 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
622 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 */
623 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
626 user_protocol_name.nb_match = 0;
627 user_protocol_name.searched_name = dissector_str;
628 user_protocol_name.matched_handle = NULL;
630 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 */
632 if (user_protocol_name.nb_match != 0) {
633 dissector_matching = user_protocol_name.matched_handle;
634 if (user_protocol_name.nb_match > 1) {
635 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
639 /* OK, check whether the problem is that there isn't any such
640 protocol, or that there is but it's not specified as a protocol
641 that's valid for that dissector table.
642 Note, we don't exit here, but dissector_matching will remain NULL,
644 if (proto_get_id_by_filter_name(dissector_str) == -1) {
645 /* No such protocol */
646 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
648 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
649 dissector_str, table_name);
654 if (!dissector_matching) {
655 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
656 fprint_all_protocols_for_layer_types(stderr, table_name);
657 g_free(decoded_param);
661 /* This is the end of the code that parses the command-line options.
662 All information is now stored in the variables:
666 The above variables that are strings are still pointing to areas within
667 decoded_parm. decoded_parm thus still needs to be kept allocated in
668 until we stop needing these variables
669 decoded_param will be deallocated at each exit point of this function */
672 /* We now have a pointer to the handle for the requested dissector
673 (requested protocol) inside the variable dissector_matching */
674 switch (dissector_table_selector_type) {
680 /* The selector for this table is an unsigned number. */
681 dissector_change_uint(table_name, selector, dissector_matching);
686 /* The selector for this table is a string. */
687 dissector_change_string(table_name, selector_str, dissector_matching);
691 /* There are currently no dissector tables with any types other
692 than the ones listed above. */
693 g_assert_not_reached();
695 g_free(decoded_param); /* "Decode As" rule has been successfully added */
700 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
701 const gchar *message, gpointer user_data)
703 /* ignore log message, if log_level isn't interesting based
704 upon the console log preferences.
705 If the preferences haven't been loaded loaded yet, display the
708 The default console_log_level preference value is such that only
709 ERROR, CRITICAL and WARNING level messages are processed;
710 MESSAGE, INFO and DEBUG level messages are ignored.
712 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
713 ERROR and CRITICAL level messages so the current code is a behavioral
714 change. The current behavior is the same as in Wireshark.
716 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
717 prefs.console_log_level != 0) {
721 g_log_default_handler(log_domain, log_level, message, user_data);
726 output_file_description(const char *fname)
728 char *save_file_string;
730 /* Get a string that describes what we're writing to */
731 if (strcmp(fname, "-") == 0) {
732 /* We're writing to the standard output */
733 save_file_string = g_strdup("standard output");
735 /* We're writing to a file with the name in save_file */
736 save_file_string = g_strdup_printf("file \"%s\"", fname);
738 return save_file_string;
742 print_current_user(void) {
743 gchar *cur_user, *cur_group;
744 if (started_with_special_privs()) {
745 cur_user = get_cur_username();
746 cur_group = get_cur_groupname();
747 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
748 cur_user, cur_group);
751 if (running_with_special_privs()) {
752 fprintf(stderr, " This could be dangerous.");
754 fprintf(stderr, "\n");
759 check_capture_privs(void) {
762 /* Warn the user if npf.sys isn't loaded. */
763 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
764 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
765 "capturing or\nlisting interfaces.\n");
771 show_version(GString *comp_info_str, GString *runtime_info_str)
773 printf("TShark " VERSION "%s\n"
780 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
781 runtime_info_str->str);
785 main(int argc, char *argv[])
787 char *init_progfile_dir_error;
789 gboolean arg_error = FALSE;
795 char *gpf_path, *pf_path;
796 char *gdp_path, *dp_path;
797 int gpf_open_errno, gpf_read_errno;
798 int pf_open_errno, pf_read_errno;
799 int gdp_open_errno, gdp_read_errno;
800 int dp_open_errno, dp_read_errno;
804 gboolean list_link_layer_types = FALSE;
805 gboolean start_capture = FALSE;
810 interface_options interface_opts;
812 gboolean capture_option_specified = FALSE;
814 gboolean quiet = FALSE;
815 #ifdef PCAP_NG_DEFAULT
816 int out_file_type = WTAP_FILE_PCAPNG;
818 int out_file_type = WTAP_FILE_PCAP;
820 gboolean out_file_name_res = FALSE;
821 gchar *cf_name = NULL, *rfilter = NULL;
822 #ifdef HAVE_PCAP_OPEN_DEAD
823 struct bpf_program fcode;
825 dfilter_t *rfcode = NULL;
828 GLogLevelFlags log_flags;
830 gchar *output_only = NULL;
833 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
834 #define OPTSTRING_B "B:"
836 #define OPTSTRING_B ""
837 #endif /* _WIN32 or HAVE_PCAP_CREATE */
838 #else /* HAVE_LIBPCAP */
839 #define OPTSTRING_B ""
840 #endif /* HAVE_LIBPCAP */
842 #ifdef HAVE_PCAP_CREATE
843 #define OPTSTRING_I "I"
845 #define OPTSTRING_I ""
848 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:St:T:u:vVw:W:xX:y:z:"
850 static const char optstring[] = OPTSTRING;
853 arg_list_utf_16to8(argc, argv);
857 * Get credential information for later use.
859 init_process_policies();
862 * Attempt to get the pathname of the executable file.
864 init_progfile_dir_error = init_progfile_dir(argv[0], main);
865 if (init_progfile_dir_error != NULL) {
866 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
867 init_progfile_dir_error);
871 * In order to have the -X opts assigned before the wslua machine starts
872 * we need to call getopts before epan_init() gets called.
875 optind_initial = optind;
877 while ((opt = getopt(argc, argv, optstring)) != -1) {
879 case 'C': /* Configuration Profile */
880 if (profile_exists (optarg, FALSE)) {
881 set_profile_name (optarg);
883 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
895 optind = optind_initial;
900 /** Send All g_log messages to our own handler **/
904 G_LOG_LEVEL_CRITICAL|
909 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
911 g_log_set_handler(NULL,
913 tshark_log_handler, NULL /* user_data */);
914 g_log_set_handler(LOG_DOMAIN_MAIN,
916 tshark_log_handler, NULL /* user_data */);
919 g_log_set_handler(LOG_DOMAIN_CAPTURE,
921 tshark_log_handler, NULL /* user_data */);
922 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
924 tshark_log_handler, NULL /* user_data */);
927 initialize_funnel_ops();
930 capture_opts_init(&global_capture_opts, &cfile);
933 timestamp_set_type(TS_RELATIVE);
934 timestamp_set_precision(TS_PREC_AUTO);
935 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
937 /* Register all dissectors; we must do this before checking for the
938 "-G" flag, as the "-G" flag dumps information registered by the
939 dissectors, and we must do it before we read the preferences, in
940 case any dissectors register preferences. */
941 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
942 failure_message, open_failure_message, read_failure_message,
943 write_failure_message);
945 /* Register all tap listeners; we do this before we parse the arguments,
946 as the "-z" argument can specify a registered tap. */
948 /* we register the plugin taps before the other taps because
949 stats_tree taps plugins will be registered as tap listeners
950 by stats_tree_stat.c and need to registered before that */
952 register_all_plugin_tap_listeners();
954 register_all_tap_listeners();
956 /* Now register the preferences for any non-dissector modules.
957 We must do that before we read the preferences as well. */
958 prefs_register_modules();
960 /* If invoked with the "-G" flag, we dump out information based on
961 the argument to the "-G" flag; if no argument is specified,
962 for backwards compatibility we dump out a glossary of display
965 XXX - we do this here, for now, to support "-G" with no arguments.
966 If none of our build or other processes uses "-G" with no arguments,
967 we can just process it with the other arguments. */
968 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
969 proto_initialize_all_prefixes();
972 proto_registrar_dump_fields(1);
974 if (strcmp(argv[2], "fields") == 0)
975 proto_registrar_dump_fields(1);
976 else if (strcmp(argv[2], "fields2") == 0)
977 proto_registrar_dump_fields(2);
978 else if (strcmp(argv[2], "fields3") == 0)
979 proto_registrar_dump_fields(3);
980 else if (strcmp(argv[2], "protocols") == 0)
981 proto_registrar_dump_protocols();
982 else if (strcmp(argv[2], "values") == 0)
983 proto_registrar_dump_values();
984 else if (strcmp(argv[2], "decodes") == 0)
985 dissector_dump_decodes();
986 else if (strcmp(argv[2], "defaultprefs") == 0)
988 else if (strcmp(argv[2], "plugins") == 0)
990 else if (strcmp(argv[2], "?") == 0)
991 glossary_option_help();
992 else if (strcmp(argv[2], "-?") == 0)
993 glossary_option_help();
994 else if (strcmp(argv[2], "currentprefs") == 0) {
995 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
996 &pf_open_errno, &pf_read_errno, &pf_path);
999 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1006 /* Set the C-language locale to the native environment. */
1007 setlocale(LC_ALL, "");
1009 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1010 &pf_open_errno, &pf_read_errno, &pf_path);
1011 if (gpf_path != NULL) {
1012 if (gpf_open_errno != 0) {
1013 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1014 pf_path, g_strerror(gpf_open_errno));
1016 if (gpf_read_errno != 0) {
1017 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1018 pf_path, g_strerror(gpf_read_errno));
1021 if (pf_path != NULL) {
1022 if (pf_open_errno != 0) {
1023 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1024 g_strerror(pf_open_errno));
1026 if (pf_read_errno != 0) {
1027 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1028 pf_path, g_strerror(pf_read_errno));
1034 /* Set the name resolution code's flags from the preferences. */
1035 gbl_resolv_flags = prefs_p->name_resolve;
1037 /* Read the disabled protocols file. */
1038 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1039 &dp_path, &dp_open_errno, &dp_read_errno);
1040 if (gdp_path != NULL) {
1041 if (gdp_open_errno != 0) {
1042 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1043 gdp_path, g_strerror(gdp_open_errno));
1045 if (gdp_read_errno != 0) {
1046 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1047 gdp_path, g_strerror(gdp_read_errno));
1051 if (dp_path != NULL) {
1052 if (dp_open_errno != 0) {
1054 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1055 g_strerror(dp_open_errno));
1057 if (dp_read_errno != 0) {
1059 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1060 g_strerror(dp_read_errno));
1065 check_capture_privs();
1067 cap_file_init(&cfile);
1069 /* Print format defaults to this. */
1070 print_format = PR_FMT_TEXT;
1072 output_fields = output_fields_new();
1074 /* Now get our args */
1075 while ((opt = getopt(argc, argv, optstring)) != -1) {
1077 case 'a': /* autostop criteria */
1078 case 'b': /* Ringbuffer option */
1079 case 'c': /* Capture x packets */
1080 case 'f': /* capture filter */
1081 case 'i': /* Use interface x */
1082 case 'p': /* Don't capture in promiscuous mode */
1083 #ifdef HAVE_PCAP_CREATE
1084 case 'I': /* Capture in monitor mode, if available */
1086 case 's': /* Set the snapshot (capture) length */
1087 case 'w': /* Write to capture file x */
1088 case 'y': /* Set the pcap data link type */
1089 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1090 case 'B': /* Buffer size */
1091 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1093 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1098 capture_option_specified = TRUE;
1103 /* Configuration profile settings were already processed just ignore them this time*/
1105 case 'd': /* Decode as rule */
1106 if (!add_decode_as(optarg))
1109 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1110 case 'K': /* Kerberos keytab file */
1111 read_keytab_file(optarg);
1114 case 'D': /* Print a list of capture devices and exit */
1116 if_list = capture_interface_list(&err, &err_str);
1117 if (if_list == NULL) {
1119 case CANT_GET_INTERFACE_LIST:
1120 cmdarg_err("%s", err_str);
1124 case NO_INTERFACES_FOUND:
1125 cmdarg_err("There are no interfaces on which a capture can be done");
1130 capture_opts_print_interfaces(if_list);
1131 free_interface_list(if_list);
1134 capture_option_specified = TRUE;
1140 output_fields_add(output_fields, optarg);
1144 if(!output_fields_set_option(output_fields, optarg)) {
1145 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1146 output_fields_list_options(stderr);
1151 out_file_type = wtap_short_string_to_file_type(optarg);
1152 if (out_file_type < 0) {
1153 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1154 list_capture_types();
1158 case 'W': /* Select extra information to save in our capture file */
1159 /* This is patterned after the -N flag which may not be the best idea. */
1160 if (strchr(optarg, 'n'))
1161 out_file_name_res = TRUE;
1163 case 'H': /* Read address to name mappings from a hosts file */
1164 if (! read_hosts_file(optarg))
1166 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1169 out_file_name_res = TRUE;
1172 case 'h': /* Print help and exit */
1176 case 'l': /* "Line-buffer" standard output */
1177 /* This isn't line-buffering, strictly speaking, it's just
1178 flushing the standard output after the information for
1179 each packet is printed; however, that should be good
1180 enough for all the purposes to which "-l" is put (and
1181 is probably actually better for "-V", as it does fewer
1184 See the comment in "process_packet()" for an explanation of
1185 why we do that, and why we don't just use "setvbuf()" to
1186 make the standard output line-buffered (short version: in
1187 Windows, "line-buffered" is the same as "fully-buffered",
1188 and the output buffer is only flushed when it fills up). */
1189 line_buffered = TRUE;
1191 case 'L': /* Print list of link-layer types and exit */
1193 list_link_layer_types = TRUE;
1195 capture_option_specified = TRUE;
1199 case 'P': /* Perform two pass analysis */
1200 perform_two_pass_analysis = TRUE;
1202 case 'n': /* No name resolution */
1203 gbl_resolv_flags = RESOLV_NONE;
1205 case 'N': /* Select what types of addresses/port #s to resolve */
1206 if (gbl_resolv_flags == RESOLV_ALL)
1207 gbl_resolv_flags = RESOLV_NONE;
1208 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1209 if (badopt != '\0') {
1210 cmdarg_err("-N specifies unknown resolving option '%c';",
1212 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1216 case 'o': /* Override preference from command line */
1217 switch (prefs_set_pref(optarg)) {
1222 case PREFS_SET_SYNTAX_ERR:
1223 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1227 case PREFS_SET_NO_SUCH_PREF:
1228 case PREFS_SET_OBSOLETE:
1229 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1234 case 'O': /* Only output these protocols */
1235 output_only = g_strdup(optarg);
1237 case 'q': /* Quiet */
1240 case 'r': /* Read capture file x */
1241 cf_name = g_strdup(optarg);
1243 case 'R': /* Read file filter */
1246 case 'S': /* show packets in real time */
1247 print_packet_info = TRUE;
1249 case 't': /* Time stamp type */
1250 if (strcmp(optarg, "r") == 0)
1251 timestamp_set_type(TS_RELATIVE);
1252 else if (strcmp(optarg, "a") == 0)
1253 timestamp_set_type(TS_ABSOLUTE);
1254 else if (strcmp(optarg, "ad") == 0)
1255 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1256 else if (strcmp(optarg, "d") == 0)
1257 timestamp_set_type(TS_DELTA);
1258 else if (strcmp(optarg, "dd") == 0)
1259 timestamp_set_type(TS_DELTA_DIS);
1260 else if (strcmp(optarg, "e") == 0)
1261 timestamp_set_type(TS_EPOCH);
1262 else if (strcmp(optarg, "u") == 0)
1263 timestamp_set_type(TS_UTC);
1264 else if (strcmp(optarg, "ud") == 0)
1265 timestamp_set_type(TS_UTC_WITH_DATE);
1267 cmdarg_err("Invalid time stamp type \"%s\"",
1269 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1270 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1274 case 'T': /* printing Type */
1275 if (strcmp(optarg, "text") == 0) {
1276 output_action = WRITE_TEXT;
1277 print_format = PR_FMT_TEXT;
1278 } else if (strcmp(optarg, "ps") == 0) {
1279 output_action = WRITE_TEXT;
1280 print_format = PR_FMT_PS;
1281 } else if (strcmp(optarg, "pdml") == 0) {
1282 output_action = WRITE_XML;
1284 } else if (strcmp(optarg, "psml") == 0) {
1285 output_action = WRITE_XML;
1287 } else if(strcmp(optarg, "fields") == 0) {
1288 output_action = WRITE_FIELDS;
1289 verbose = TRUE; /* Need full tree info */
1291 cmdarg_err("Invalid -T parameter.");
1292 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1296 case 'u': /* Seconds type */
1297 if (strcmp(optarg, "s") == 0)
1298 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1299 else if (strcmp(optarg, "hms") == 0)
1300 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1302 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1303 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1307 case 'v': /* Show version and exit */
1309 GString *comp_info_str;
1310 GString *runtime_info_str;
1311 /* Assemble the compile-time version information string */
1312 comp_info_str = g_string_new("Compiled ");
1313 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1315 /* Assemble the run-time version information string */
1316 runtime_info_str = g_string_new("Running ");
1317 get_runtime_version_info(runtime_info_str, NULL);
1318 show_version(comp_info_str, runtime_info_str);
1319 g_string_free(comp_info_str, TRUE);
1320 g_string_free(runtime_info_str, TRUE);
1324 case 'V': /* Verbose */
1326 /* The user asked for a verbose output, so let's ensure they get it,
1327 * even if they're writing to a file.
1329 print_packet_info = TRUE;
1331 case 'x': /* Print packet data in hex (and ASCII) */
1333 /* The user asked for hex output, so let's ensure they get it,
1334 * even if they're writing to a file.
1336 print_packet_info = TRUE;
1341 /* We won't call the init function for the stat this soon
1342 as it would disallow MATE's fields (which are registered
1343 by the preferences set callback) from being used as
1344 part of a tap filter. Instead, we just add the argument
1345 to a list of stat arguments. */
1346 if (!process_stat_cmd_arg(optarg)) {
1347 cmdarg_err("invalid -z argument.");
1348 cmdarg_err_cont(" -z argument must be one of :");
1349 list_stat_cmd_args();
1354 case '?': /* Bad flag - print usage message */
1357 list_capture_types();
1367 /* If we specified output fields, but not the output field type... */
1368 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1369 cmdarg_err("Output fields were specified with \"-e\", "
1370 "but \"-Tfields\" was not specified.");
1372 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1373 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1374 "specified with \"-e\".");
1379 /* If no capture filter or read filter has been specified, and there are
1380 still command-line arguments, treat them as the tokens of a capture
1381 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1382 flag was specified. */
1383 if (optind < argc) {
1384 if (cf_name != NULL) {
1385 if (rfilter != NULL) {
1386 cmdarg_err("Read filters were specified both with \"-R\" "
1387 "and with additional command-line arguments.");
1390 rfilter = get_args_as_string(argc, argv, optind);
1393 if (global_capture_opts.default_options.cfilter) {
1394 cmdarg_err("A default capture filter was specified both with \"-f\""
1395 " and with additional command-line arguments.");
1398 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1399 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1400 if (interface_opts.cfilter == NULL) {
1401 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1402 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1403 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1405 cmdarg_err("A capture filter was specified both with \"-f\""
1406 " and with additional command-line arguments.");
1410 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1412 capture_option_specified = TRUE;
1418 if (!global_capture_opts.saving_to_file) {
1419 /* We're not saving the capture to a file; if "-q" wasn't specified,
1420 we should print packet information */
1422 print_packet_info = TRUE;
1424 /* We're saving to a file; if we're writing to the standard output.
1425 and we'll also be writing dissected packets to the standard
1426 output, reject the request. At best, we could redirect that
1427 to the standard error; we *can't* write both to the standard
1428 output and have either of them be useful. */
1429 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1430 cmdarg_err("You can't write both raw packet data and dissected packets"
1431 " to the standard output.");
1436 /* We're not saving the capture to a file; if "-q" wasn't specified,
1437 we should print packet information */
1439 print_packet_info = TRUE;
1442 #ifndef HAVE_LIBPCAP
1443 if (capture_option_specified)
1444 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1451 /* We don't support capture filters when reading from a capture file
1452 (the BPF compiler doesn't support all link-layer types that we
1453 support in capture files we read). */
1455 if (cf_name != NULL) {
1456 if (global_capture_opts.default_options.cfilter) {
1457 cmdarg_err("Only read filters, not capture filters, "
1458 "can be specified when reading a capture file.");
1465 if (output_action != WRITE_TEXT) {
1466 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1471 if (output_only != NULL) {
1475 cmdarg_err("-O requires -V");
1479 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1480 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1481 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1486 if (list_link_layer_types) {
1487 /* We're supposed to list the link-layer types for an interface;
1488 did the user also specify a capture file to be read? */
1490 /* Yes - that's bogus. */
1491 cmdarg_err("You can't specify -L and a capture file to be read.");
1494 /* No - did they specify a ring buffer option? */
1495 if (global_capture_opts.multi_files_on) {
1496 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1502 * "-r" was specified, so we're reading a capture file.
1503 * Capture options don't apply here.
1505 if (global_capture_opts.multi_files_on) {
1506 cmdarg_err("Multiple capture files requested, but "
1507 "a capture isn't being done.");
1510 if (global_capture_opts.has_file_duration) {
1511 cmdarg_err("Switching capture files after a time interval was specified, but "
1512 "a capture isn't being done.");
1515 if (global_capture_opts.has_ring_num_files) {
1516 cmdarg_err("A ring buffer of capture files was specified, but "
1517 "a capture isn't being done.");
1520 if (global_capture_opts.has_autostop_files) {
1521 cmdarg_err("A maximum number of capture files was specified, but "
1522 "a capture isn't being done.");
1526 /* Note: TShark now allows the restriction of a _read_ file by packet count
1527 * and byte count as well as a write file. Other autostop options remain valid
1528 * only for a write file.
1530 if (global_capture_opts.has_autostop_duration) {
1531 cmdarg_err("A maximum capture time was specified, but "
1532 "a capture isn't being done.");
1537 * "-r" wasn't specified, so we're doing a live capture.
1539 if (global_capture_opts.saving_to_file) {
1540 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1542 /* When capturing, we only support writing pcap or pcap-ng format. */
1543 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1544 cmdarg_err("Live captures can only be saved in libpcap format.");
1547 if (global_capture_opts.multi_files_on) {
1548 /* Multiple-file mode doesn't work under certain conditions:
1549 a) it doesn't work if you're writing to the standard output;
1550 b) it doesn't work if you're writing to a pipe;
1552 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1553 cmdarg_err("Multiple capture files requested, but "
1554 "the capture is being written to the standard output.");
1557 if (global_capture_opts.output_to_pipe) {
1558 cmdarg_err("Multiple capture files requested, but "
1559 "the capture file is a pipe.");
1562 if (!global_capture_opts.has_autostop_filesize &&
1563 !global_capture_opts.has_file_duration) {
1564 cmdarg_err("Multiple capture files requested, but "
1565 "no maximum capture file size or duration was specified.");
1569 /* Currently, we don't support read filters when capturing
1570 and saving the packets. */
1571 if (rfilter != NULL) {
1572 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1576 /* They didn't specify a "-w" flag, so we won't be saving to a
1577 capture file. Check for options that only make sense if
1578 we're saving to a file. */
1579 if (global_capture_opts.has_autostop_filesize) {
1580 cmdarg_err("Maximum capture file size specified, but "
1581 "capture isn't being saved to a file.");
1584 if (global_capture_opts.multi_files_on) {
1585 cmdarg_err("Multiple capture files requested, but "
1586 "the capture isn't being saved to a file.");
1595 /* Start windows sockets */
1596 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1599 /* Notify all registered modules that have had any of their preferences
1600 changed either from one of the preferences file or from the command
1601 line that their preferences have changed. */
1604 /* At this point MATE will have registered its field array so we can
1605 have a tap filter with one of MATE's late-registered fields as part
1606 of the filter. We can now process all the "-z" arguments. */
1607 start_requested_stats();
1610 /* We currently don't support taps, or printing dissected packets,
1611 if we're writing to a pipe. */
1612 if (global_capture_opts.saving_to_file &&
1613 global_capture_opts.output_to_pipe) {
1614 if (tap_listeners_require_dissection()) {
1615 cmdarg_err("Taps aren't supported when saving to a pipe.");
1618 if (print_packet_info) {
1619 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1625 /* disabled protocols as per configuration file */
1626 if (gdp_path == NULL && dp_path == NULL) {
1627 set_disabled_protos_list();
1630 /* Build the column format array */
1631 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1634 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1635 capture_opts_trim_ring_num_files(&global_capture_opts);
1638 if (rfilter != NULL) {
1639 if (!dfilter_compile(rfilter, &rfcode)) {
1640 cmdarg_err("%s", dfilter_error_msg);
1642 #ifdef HAVE_PCAP_OPEN_DEAD
1646 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1648 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1650 " Note: That display filter code looks like a valid capture filter;");
1652 " maybe you mixed them up?");
1661 cfile.rfcode = rfcode;
1663 if (print_packet_info) {
1664 /* If we're printing as text or PostScript, we have
1665 to create a print stream. */
1666 if (output_action == WRITE_TEXT) {
1667 switch (print_format) {
1670 print_stream = print_stream_text_stdio_new(stdout);
1674 print_stream = print_stream_ps_stdio_new(stdout);
1678 g_assert_not_reached();
1683 /* We have to dissect each packet if:
1685 we're printing information about each packet;
1687 we're using a read filter on the packets;
1689 we're using any taps that need dissection. */
1690 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1694 * We're reading a capture file.
1698 * Immediately relinquish any special privileges we have; we must not
1699 * be allowed to read any capture files the user running TShark
1702 relinquish_special_privs_perm();
1703 print_current_user();
1705 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1710 /* Set timestamp precision; there should arguably be a command-line
1711 option to let the user set this. */
1712 switch(wtap_file_tsprecision(cfile.wth)) {
1713 case(WTAP_FILE_TSPREC_SEC):
1714 timestamp_set_precision(TS_PREC_AUTO_SEC);
1716 case(WTAP_FILE_TSPREC_DSEC):
1717 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1719 case(WTAP_FILE_TSPREC_CSEC):
1720 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1722 case(WTAP_FILE_TSPREC_MSEC):
1723 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1725 case(WTAP_FILE_TSPREC_USEC):
1726 timestamp_set_precision(TS_PREC_AUTO_USEC);
1728 case(WTAP_FILE_TSPREC_NSEC):
1729 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1732 g_assert_not_reached();
1735 /* Process the packets in the file */
1737 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1738 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1739 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1741 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1744 /* We still dump out the results of taps, etc., as we might have
1745 read some packets; however, we exit with an error status. */
1749 /* No capture file specified, so we're supposed to do a live capture
1750 (or get a list of link-layer types for a live capture device);
1751 do we have support for live captures? */
1758 cmdarg_err("WinPcap couldn't be found.");
1759 detailed_err = cant_load_winpcap_err("TShark");
1760 cmdarg_err_cont("%s", detailed_err);
1761 g_free(detailed_err);
1766 /* trim the interface name and exit if that failed */
1767 if (!capture_opts_trim_iface(&global_capture_opts,
1768 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1772 /* if requested, list the link layer types and exit */
1773 if (list_link_layer_types) {
1775 interface_options interface_opts;
1777 /* Get the list of link-layer types for the capture devices. */
1778 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1779 if_capabilities_t *caps;
1781 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1782 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1784 cmdarg_err("%s", err_str);
1788 if (caps->data_link_types == NULL) {
1789 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1792 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1793 free_if_capabilities(caps);
1798 if (print_packet_info) {
1799 if (!write_preamble(NULL)) {
1800 show_print_file_io_error(errno);
1803 } else if (!quiet) {
1805 * We're not printing information for each packet, and the user
1806 * didn't ask us not to print a count of packets as they arrive,
1807 * so print that count so the user knows that packets are arriving.
1809 * XXX - what if the user wants to do a live capture, doesn't want
1810 * to save it to a file, doesn't want information printed for each
1811 * packet, does want some "-z" statistic, and wants packet counts
1812 * so they know whether they're seeing any packets?
1814 print_packet_counts = TRUE;
1817 /* For now, assume libpcap gives microsecond precision. */
1818 timestamp_set_precision(TS_PREC_AUTO_USEC);
1821 * XXX - this returns FALSE if an error occurred, but it also
1822 * returns FALSE if the capture stops because a time limit
1823 * was reached (and possibly other limits), so we can't assume
1824 * it means an error.
1826 * The capture code is a bit twisty, so it doesn't appear to
1827 * be an easy fix. We just ignore the return value for now.
1828 * Instead, pass on the exit status from the capture child.
1831 exit_status = global_capture_opts.fork_child_status;
1833 if (print_packet_info) {
1834 if (!write_finale()) {
1836 show_print_file_io_error(err);
1840 /* No - complain. */
1841 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1848 if (cfile.frames != NULL) {
1849 free_frame_data_sequence(cfile.frames);
1850 cfile.frames = NULL;
1853 draw_tap_listeners(TRUE);
1854 funnel_dump_all_text_windows();
1857 output_fields_free(output_fields);
1858 output_fields = NULL;
1863 /*#define USE_BROKEN_G_MAIN_LOOP*/
1865 #ifdef USE_BROKEN_G_MAIN_LOOP
1868 gboolean loop_running = FALSE;
1870 guint32 packet_count = 0;
1873 /* XXX - move to the right position / file */
1874 /* read from a pipe (callback) */
1875 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1877 typedef struct pipe_input_tag {
1881 pipe_input_cb_t input_cb;
1882 guint pipe_input_id;
1884 GStaticMutex callback_running;
1888 static pipe_input_t pipe_input;
1891 /* The timer has expired, see if there's stuff to read from the pipe,
1892 if so, do the callback */
1894 pipe_timer_cb(gpointer data)
1898 gboolean result, result1;
1900 pipe_input_t *pipe_input_p = data;
1901 gint iterations = 0;
1904 g_static_mutex_lock (&pipe_input_p->callback_running);
1906 /* try to read data from the pipe only 5 times, to avoid blocking */
1907 while(iterations < 5) {
1908 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1910 /* Oddly enough although Named pipes don't work on win9x,
1911 PeekNamedPipe does !!! */
1912 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1913 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1915 /* Get the child process exit status */
1916 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1919 /* If the Peek returned an error, or there are bytes to be read
1920 or the childwatcher thread has terminated then call the normal
1922 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1924 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1926 /* And call the real handler */
1927 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1928 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1929 /* pipe closed, return false so that the timer is stopped */
1930 g_static_mutex_unlock (&pipe_input_p->callback_running);
1935 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1936 /* No data, stop now */
1943 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1945 g_static_mutex_unlock (&pipe_input_p->callback_running);
1947 /* we didn't stopped the timer, so let it run */
1954 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1957 pipe_input.source = source;
1958 pipe_input.child_process = child_process;
1959 pipe_input.user_data = user_data;
1960 pipe_input.input_cb = input_cb;
1963 g_static_mutex_init(&pipe_input.callback_running);
1964 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1965 do this but that doesn't cover all win32 platforms. GTK can do
1966 this but doesn't seem to work over processes. Attempt to do
1967 something similar here, start a timer and check for data on every
1969 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1970 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1981 GString *str = g_string_new("");
1982 #ifdef USE_TSHARK_SELECT
1986 struct sigaction action, oldaction;
1990 * XXX - dropping privileges is still required, until code cleanup is done
1992 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1993 * when it's done, we don't need special privileges to run tshark at all,
1994 * therefore we don't need to drop these privileges
1995 * The only thing we might want to keep is a warning if tshark is run as root,
1996 * as it's no longer necessary and potentially dangerous.
1998 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1999 * We've opened the capture device, so we shouldn't need any special
2000 * privileges any more; relinquish those privileges.
2002 * XXX - if we have saved set-user-ID support, we should give up those
2003 * privileges immediately, and then reclaim them long enough to get
2004 * a list of network interfaces and to open one, and then give them
2005 * up again, so that stuff we do while processing the argument list,
2006 * reading the user's preferences, loading and starting plugins
2007 * (especially *user* plugins), etc. is done with the user's privileges,
2008 * not special privileges.
2010 relinquish_special_privs_perm();
2011 print_current_user();
2013 /* Cleanup all data structures used for dissection. */
2014 cleanup_dissection();
2015 /* Initialize all data structures used for dissection. */
2019 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2020 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2022 /* Catch SIGINT and SIGTERM and, if we get either of them,
2023 clean up and exit. If SIGHUP isn't being ignored, catch
2024 it too and, if we get it, clean up and exit.
2026 We restart any read that was in progress, so that it doesn't
2027 disrupt reading from the sync pipe. The signal handler tells
2028 the capture child to finish; it will report that it finished,
2029 or will exit abnormally, so we'll stop reading from the sync
2030 pipe, pick up the exit status, and quit. */
2031 action.sa_handler = capture_cleanup;
2032 action.sa_flags = SA_RESTART;
2033 sigemptyset(&action.sa_mask);
2034 sigaction(SIGTERM, &action, NULL);
2035 sigaction(SIGINT, &action, NULL);
2036 sigaction(SIGHUP, NULL, &oldaction);
2037 if (oldaction.sa_handler == SIG_DFL)
2038 sigaction(SIGHUP, &action, NULL);
2041 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2042 quiet mode, report the number of packets we've captured.
2044 Again, restart any read that was in progress, so that it doesn't
2045 disrupt reading from the sync pipe. */
2046 action.sa_handler = report_counts_siginfo;
2047 action.sa_flags = SA_RESTART;
2048 sigemptyset(&action.sa_mask);
2049 sigaction(SIGINFO, &action, NULL);
2050 #endif /* SIGINFO */
2053 global_capture_opts.state = CAPTURE_PREPARING;
2055 /* Let the user know which interfaces were chosen. */
2056 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2057 interface_options interface_opts;
2059 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2060 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2061 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2062 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2065 if (global_capture_opts.ifaces->len < 2) {
2067 if (global_capture_opts.ifaces->len < 4) {
2069 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2070 interface_options interface_opts;
2072 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2074 if (global_capture_opts.ifaces->len > 2) {
2075 g_string_append_printf(str, ",");
2077 g_string_append_printf(str, " ");
2078 if (i == global_capture_opts.ifaces->len - 1) {
2079 g_string_append_printf(str, "and ");
2082 g_string_append_printf(str, "%s", interface_opts.descr);
2085 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2087 fprintf(stderr, "Capturing on %s\n", str->str);
2088 g_string_free(str, TRUE);
2090 ret = sync_pipe_start(&global_capture_opts);
2095 /* the actual capture loop
2097 * XXX - glib doesn't seem to provide any event based loop handling.
2099 * XXX - for whatever reason,
2100 * calling g_main_loop_new() ends up in 100% cpu load.
2102 * But that doesn't matter: in UNIX we can use select() to find an input
2103 * source with something to do.
2105 * But that doesn't matter because we're in a CLI (that doesn't need to
2106 * update a GUI or something at the same time) so it's OK if we block
2107 * trying to read from the pipe.
2109 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2110 * wrong (but I leave it there in case I am...).
2113 #ifdef USE_TSHARK_SELECT
2115 FD_SET(pipe_input.source, &readfds);
2118 loop_running = TRUE;
2120 while (loop_running)
2122 #ifdef USE_TSHARK_SELECT
2123 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2129 } else if (ret == 1) {
2131 /* Call the real handler */
2132 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2133 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2136 #ifdef USE_TSHARK_SELECT
2145 /* XXX - move the call to main_window_update() out of capture_sync.c */
2146 /* dummy for capture_sync.c to make linker happy */
2147 void main_window_update(void)
2151 /* capture child detected an error */
2153 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2155 cmdarg_err("%s", error_msg);
2156 cmdarg_err_cont("%s", secondary_error_msg);
2160 /* capture child detected an capture filter related error */
2162 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2164 dfilter_t *rfcode = NULL;
2165 interface_options interface_opts;
2167 g_assert(i < capture_opts->ifaces->len);
2168 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2170 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2172 "Invalid capture filter \"%s\" for interface %s!\n"
2174 "That string looks like a valid display filter; however, it isn't a valid\n"
2175 "capture filter (%s).\n"
2177 "Note that display filters and capture filters don't have the same syntax,\n"
2178 "so you can't use most display filter expressions as capture filters.\n"
2180 "See the User's Guide for a description of the capture filter syntax.",
2181 interface_opts.cfilter, interface_opts.descr, error_message);
2182 dfilter_free(rfcode);
2185 "Invalid capture filter \"%s\" for interface %s!\n"
2187 "That string isn't a valid capture filter (%s).\n"
2188 "See the User's Guide for a description of the capture filter syntax.",
2189 interface_opts.cfilter, interface_opts.descr, error_message);
2194 /* capture child tells us we have a new (or the first) capture file */
2196 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2198 gboolean is_tempfile;
2201 if(capture_opts->state == CAPTURE_PREPARING) {
2202 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2204 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2206 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2208 /* free the old filename */
2209 if (capture_opts->save_file != NULL) {
2211 /* we start a new capture file, close the old one (if we had one before) */
2212 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2213 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2214 wtap_close(((capture_file *) capture_opts->cf)->wth);
2216 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2219 g_free(capture_opts->save_file);
2220 is_tempfile = FALSE;
2222 /* we didn't had a save_file before, must be a tempfile */
2226 /* save the new filename */
2227 capture_opts->save_file = g_strdup(new_file);
2229 /* if we are in real-time mode, open the new file now */
2231 /* Attempt to open the capture file and set up to read from it. */
2232 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2236 /* Don't unlink (delete) the save file - leave it around,
2237 for debugging purposes. */
2238 g_free(capture_opts->save_file);
2239 capture_opts->save_file = NULL;
2244 capture_opts->state = CAPTURE_RUNNING;
2250 /* capture child tells us we have new packets to read */
2252 capture_input_new_packets(capture_options *capture_opts, int to_read)
2258 capture_file *cf = capture_opts->cf;
2259 gboolean filtering_tap_listeners;
2264 * Prevent a SIGINFO handler from writing to the standard error while
2265 * we're doing so or writing to the standard output; instead, have it
2266 * just set a flag telling us to print that information when we're done.
2269 #endif /* SIGINFO */
2271 /* Do we have any tap listeners with filters? */
2272 filtering_tap_listeners = have_filtering_tap_listeners();
2274 /* Get the union of the flags for all tap listeners. */
2275 tap_flags = union_of_tap_listener_flags();
2278 while (to_read-- && cf->wth) {
2279 wtap_cleareof(cf->wth);
2280 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2282 /* read from file failed, tell the capture child to stop */
2283 sync_pipe_stop(capture_opts);
2284 wtap_close(cf->wth);
2287 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2288 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2289 filtering_tap_listeners, tap_flags);
2292 /* packet successfully read and gone through the "Read Filter" */
2298 * Dumpcap's doing all the work; we're not doing any dissection.
2299 * Count all the packets it wrote.
2301 packet_count += to_read;
2304 if (print_packet_counts) {
2305 /* We're printing packet counts. */
2306 if (packet_count != 0) {
2307 fprintf(stderr, "\r%u ", packet_count);
2308 /* stderr could be line buffered */
2315 * Allow SIGINFO handlers to write.
2320 * If a SIGINFO handler asked us to write out capture counts, do so.
2324 #endif /* SIGINFO */
2330 if (!print_packet_counts) {
2331 /* Report the count only if we aren't printing a packet count
2332 as packets arrive. */
2333 fprintf(stderr, "%u packet%s captured\n", packet_count,
2334 plurality(packet_count, "", "s"));
2337 infoprint = FALSE; /* we just reported it */
2338 #endif /* SIGINFO */
2343 report_counts_siginfo(int signum _U_)
2345 int sav_errno = errno;
2346 /* If we've been told to delay printing, just set a flag asking
2347 that we print counts (if we're supposed to), otherwise print
2348 the count of packets captured (if we're supposed to). */
2355 #endif /* SIGINFO */
2358 /* capture child detected any packet drops? */
2360 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2362 if (print_packet_counts) {
2363 /* We're printing packet counts to stderr.
2364 Send a newline so that we move to the line after the packet count. */
2365 fprintf(stderr, "\n");
2369 /* We're printing packet counts to stderr.
2370 Send a newline so that we move to the line after the packet count. */
2371 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2377 * Capture child closed its side of the pipe, report any error and
2378 * do the required cleanup.
2381 capture_input_closed(capture_options *capture_opts, gchar *msg)
2384 fprintf(stderr, "tshark: %s\n", msg);
2388 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2389 wtap_close(((capture_file *) capture_opts->cf)->wth);
2390 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2391 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2394 #ifdef USE_BROKEN_G_MAIN_LOOP
2395 /*g_main_loop_quit(loop);*/
2398 loop_running = FALSE;
2407 capture_cleanup(DWORD ctrltype _U_)
2409 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2410 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2411 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2412 like SIGTERM at least when the machine's shutting down.
2414 For now, we handle them all as indications that we should clean up
2415 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2418 We must return TRUE so that no other handler - such as one that would
2419 terminate the process - gets called.
2421 XXX - for some reason, typing ^C to TShark, if you run this in
2422 a Cygwin console window in at least some versions of Cygwin,
2423 causes TShark to terminate immediately; this routine gets
2424 called, but the main loop doesn't get a chance to run and
2425 exit cleanly, at least if this is compiled with Microsoft Visual
2426 C++ (i.e., it's a property of the Cygwin console window or Bash;
2427 it happens if TShark is not built with Cygwin - for all I know,
2428 building it with Cygwin may make the problem go away). */
2430 /* tell the capture child to stop */
2431 sync_pipe_stop(&global_capture_opts);
2433 /* don't stop our own loop already here, otherwise status messages and
2434 * cleanup wouldn't be done properly. The child will indicate the stop of
2435 * everything by calling capture_input_closed() later */
2441 capture_cleanup(int signum _U_)
2443 /* tell the capture child to stop */
2444 sync_pipe_stop(&global_capture_opts);
2446 /* don't stop our own loop already here, otherwise status messages and
2447 * cleanup wouldn't be done properly. The child will indicate the stop of
2448 * everything by calling capture_input_closed() later */
2451 #endif /* HAVE_LIBPCAP */
2454 process_packet_first_pass(capture_file *cf,
2455 gint64 offset, const struct wtap_pkthdr *whdr,
2456 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2463 /* The frame number of this packet is one more than the count of
2464 frames in this packet. */
2465 framenum = cf->count + 1;
2467 /* If we're not running a display filter and we're not printing any
2468 packet information, we don't need to do a dissection. This means
2469 that all packets can be marked as 'passed'. */
2472 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2474 /* If we're going to print packet information, or we're going to
2475 run a read filter, or we're going to process taps, set up to
2476 do a dissection and do so. */
2477 if (do_dissection) {
2478 if (gbl_resolv_flags)
2479 /* Grab any resolved addresses */
2480 host_name_lookup_process(NULL);
2482 /* The protocol tree will be "visible", i.e., printed, only if we're
2483 printing packet details, which is true if we're printing stuff
2484 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2486 epan_dissect_init(&edt, FALSE, FALSE);
2488 /* If we're running a read filter, prime the epan_dissect_t with that
2491 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2493 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2494 &first_ts, &prev_dis_ts, &prev_cap_ts);
2496 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2498 /* Run the read filter if we have one. */
2500 passed = dfilter_apply_edt(cf->rfcode, &edt);
2504 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2505 frame_data_sequence_add(cf->frames, &fdlocal);
2510 epan_dissect_cleanup(&edt);
2516 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2517 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2518 gboolean filtering_tap_listeners, guint tap_flags)
2520 gboolean create_proto_tree;
2525 /* If we're not running a display filter and we're not printing any
2526 packet information, we don't need to do a dissection. This means
2527 that all packets can be marked as 'passed'. */
2530 /* If we're going to print packet information, or we're going to
2531 run a read filter, or we're going to process taps, set up to
2532 do a dissection and do so. */
2533 if (do_dissection) {
2534 if (gbl_resolv_flags)
2535 /* Grab any resolved addresses */
2536 host_name_lookup_process(NULL);
2538 if (cf->rfcode || verbose || filtering_tap_listeners ||
2539 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2540 create_proto_tree = TRUE;
2542 create_proto_tree = FALSE;
2544 /* The protocol tree will be "visible", i.e., printed, only if we're
2545 printing packet details, which is true if we're printing stuff
2546 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2548 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2550 /* If we're running a read filter, prime the epan_dissect_t with that
2553 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2555 col_custom_prime_edt(&edt, &cf->cinfo);
2557 tap_queue_init(&edt);
2559 /* We only need the columns if either
2561 1) some tap needs the columns
2565 2) we're printing packet info but we're *not* verbose; in verbose
2566 mode, we print the protocol tree, not the protocol summary. */
2567 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2572 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2574 tap_push_tapped_queue(&edt);
2576 /* Run the read filter if we have one. */
2578 passed = dfilter_apply_edt(cf->rfcode, &edt);
2582 /* Process this packet. */
2583 if (print_packet_info) {
2584 /* We're printing packet information; print the information for
2587 print_packet(cf, &edt);
2589 print_packet(cf, NULL);
2591 /* The ANSI C standard does not appear to *require* that a line-buffered
2592 stream be flushed to the host environment whenever a newline is
2593 written, it just says that, on such a stream, characters "are
2594 intended to be transmitted to or from the host environment as a
2595 block when a new-line character is encountered".
2597 The Visual C++ 6.0 C implementation doesn't do what is intended;
2598 even if you set a stream to be line-buffered, it still doesn't
2599 flush the buffer at the end of every line.
2601 So, if the "-l" flag was specified, we flush the standard output
2602 at the end of a packet. This will do the right thing if we're
2603 printing packet summary lines, and, as we print the entire protocol
2604 tree for a single packet without waiting for anything to happen,
2605 it should be as good as line-buffered mode if we're printing
2606 protocol trees. (The whole reason for the "-l" flag in either
2607 tcpdump or TShark is to allow the output of a live capture to
2608 be piped to a program or script and to have that script see the
2609 information for the packet as soon as it's printed, rather than
2610 having to wait until a standard I/O buffer fills up. */
2614 if (ferror(stdout)) {
2615 show_print_file_io_error(errno);
2621 if (do_dissection) {
2622 epan_dissect_cleanup(&edt);
2628 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2629 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2632 int snapshot_length;
2635 gchar *err_info = NULL;
2637 char *save_file_string = NULL;
2638 gboolean filtering_tap_listeners;
2641 #ifdef PCAP_NG_DEFAULT
2642 linktype = WTAP_ENCAP_PER_PACKET;
2644 linktype = wtap_file_encap(cf->wth);
2646 if (save_file != NULL) {
2647 /* Get a string that describes what we're writing to */
2648 save_file_string = output_file_description(save_file);
2650 /* Set up to write to the capture file. */
2651 snapshot_length = wtap_snapshot_length(cf->wth);
2652 if (snapshot_length == 0) {
2653 /* Snapshot length of input file not known. */
2654 snapshot_length = WTAP_MAX_PACKET_SIZE;
2656 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2657 FALSE /* compressed */, &err);
2660 /* We couldn't set up to write to the capture file. */
2663 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2664 cmdarg_err("Capture files can't be written in that format.");
2667 case WTAP_ERR_UNSUPPORTED_ENCAP:
2668 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2669 cmdarg_err("The capture file being read can't be written in "
2670 "the format \"%s\".", wtap_encap_short_string(linktype));
2673 case WTAP_ERR_CANT_OPEN:
2674 cmdarg_err("The %s couldn't be created for some "
2675 "unknown reason.", save_file_string);
2678 case WTAP_ERR_SHORT_WRITE:
2679 cmdarg_err("A full header couldn't be written to the %s.",
2684 cmdarg_err("The %s could not be created: %s.", save_file_string,
2685 wtap_strerror(err));
2691 if (print_packet_info) {
2692 if (!write_preamble(cf)) {
2694 show_print_file_io_error(err);
2701 if (pdh && out_file_name_res) {
2702 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2703 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2704 wtap_file_type_short_string(out_file_type));
2708 /* Do we have any tap listeners with filters? */
2709 filtering_tap_listeners = have_filtering_tap_listeners();
2711 /* Get the union of the flags for all tap listeners. */
2712 tap_flags = union_of_tap_listener_flags();
2714 if (perform_two_pass_analysis) {
2717 int old_max_packet_count = max_packet_count;
2719 /* Allocate a frame_data_sequence for all the frames. */
2720 cf->frames = new_frame_data_sequence();
2722 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2723 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2724 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2725 /* Stop reading if we have the maximum number of packets;
2726 * When the -c option has not been used, max_packet_count
2727 * starts at 0, which practically means, never stop reading.
2728 * (unless we roll over max_packet_count ?)
2730 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2731 err = 0; /* This is not an error */
2737 /* Close the sequential I/O side, to free up memory it requires. */
2738 wtap_sequential_close(cf->wth);
2740 /* Allow the protocol dissectors to free up memory that they
2741 * don't need after the sequential run-through of the packets. */
2742 postseq_cleanup_all_protocols();
2744 max_packet_count = old_max_packet_count;
2746 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2747 fdata = frame_data_sequence_find(cf->frames, framenum);
2748 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2749 cf->pd, fdata->cap_len, &err, &err_info)) {
2750 if (process_packet_second_pass(cf, fdata,
2751 &cf->pseudo_header, cf->pd,
2752 filtering_tap_listeners, tap_flags)) {
2753 /* Either there's no read filtering or this packet passed the
2754 filter, so, if we're writing to a capture file, write
2757 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2758 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2760 /* Error writing to a capture file */
2761 show_capture_file_io_error(save_file, err, FALSE);
2762 wtap_dump_close(pdh, &err);
2766 /* Stop reading if we have the maximum number of packets;
2767 * When the -c option has not been used, max_packet_count
2768 * starts at 0, which practically means, never stop reading.
2769 * (unless we roll over max_packet_count ?)
2771 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2772 err = 0; /* This is not an error */
2780 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2781 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2782 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2783 filtering_tap_listeners, tap_flags)) {
2784 /* Either there's no read filtering or this packet passed the
2785 filter, so, if we're writing to a capture file, write
2788 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2789 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2791 /* Error writing to a capture file */
2792 show_capture_file_io_error(save_file, err, FALSE);
2793 wtap_dump_close(pdh, &err);
2797 /* Stop reading if we have the maximum number of packets;
2798 * When the -c option has not been used, max_packet_count
2799 * starts at 0, which practically means, never stop reading.
2800 * (unless we roll over max_packet_count ?)
2802 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2803 err = 0; /* This is not an error */
2812 * Print a message noting that the read failed somewhere along the line.
2814 * If we're printing packet data, and the standard output and error are
2815 * going to the same place, flush the standard output, so everything
2816 * buffered up is written, and then print a newline to the standard error
2817 * before printing the error message, to separate it from the packet
2818 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2819 * the _fstat() documentation at Microsoft doesn't indicate whether
2820 * st_ino is even supported.)
2823 if (print_packet_info) {
2824 struct stat stat_stdout, stat_stderr;
2826 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2827 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2828 stat_stdout.st_ino == stat_stderr.st_ino) {
2830 fprintf(stderr, "\n");
2837 case WTAP_ERR_UNSUPPORTED_ENCAP:
2838 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2839 cf->filename, err_info);
2843 case WTAP_ERR_CANT_READ:
2844 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2848 case WTAP_ERR_SHORT_READ:
2849 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2853 case WTAP_ERR_BAD_RECORD:
2854 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2855 cf->filename, err_info);
2859 case WTAP_ERR_DECOMPRESS:
2860 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2861 "(%s)", cf->filename, err_info);
2865 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2866 cf->filename, wtap_strerror(err));
2869 if (save_file != NULL) {
2870 /* Now close the capture file. */
2871 if (!wtap_dump_close(pdh, &err))
2872 show_capture_file_io_error(save_file, err, TRUE);
2875 if (save_file != NULL) {
2876 /* Now close the capture file. */
2877 if (!wtap_dump_close(pdh, &err))
2878 show_capture_file_io_error(save_file, err, TRUE);
2880 if (print_packet_info) {
2881 if (!write_finale()) {
2883 show_print_file_io_error(err);
2890 wtap_close(cf->wth);
2893 g_free(save_file_string);
2899 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2900 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2901 gboolean filtering_tap_listeners, guint tap_flags)
2904 gboolean create_proto_tree;
2909 /* Count this packet. */
2912 /* If we're not running a display filter and we're not printing any
2913 packet information, we don't need to do a dissection. This means
2914 that all packets can be marked as 'passed'. */
2917 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2919 /* If we're going to print packet information, or we're going to
2920 run a read filter, or we're going to process taps, set up to
2921 do a dissection and do so. */
2922 if (do_dissection) {
2923 if (print_packet_info && gbl_resolv_flags)
2924 /* Grab any resolved addresses */
2925 host_name_lookup_process(NULL);
2927 if (cf->rfcode || verbose || filtering_tap_listeners ||
2928 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2929 create_proto_tree = TRUE;
2931 create_proto_tree = FALSE;
2933 /* The protocol tree will be "visible", i.e., printed, only if we're
2934 printing packet details, which is true if we're printing stuff
2935 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2937 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2939 /* If we're running a read filter, prime the epan_dissect_t with that
2942 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2944 col_custom_prime_edt(&edt, &cf->cinfo);
2946 tap_queue_init(&edt);
2948 /* We only need the columns if either
2950 1) some tap needs the columns
2954 2) we're printing packet info but we're *not* verbose; in verbose
2955 mode, we print the protocol tree, not the protocol summary. */
2956 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2961 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2962 &first_ts, &prev_dis_ts, &prev_cap_ts);
2964 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2966 tap_push_tapped_queue(&edt);
2968 /* Run the read filter if we have one. */
2970 passed = dfilter_apply_edt(cf->rfcode, &edt);
2974 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2976 /* Process this packet. */
2977 if (print_packet_info) {
2978 /* We're printing packet information; print the information for
2981 print_packet(cf, &edt);
2983 print_packet(cf, NULL);
2985 /* The ANSI C standard does not appear to *require* that a line-buffered
2986 stream be flushed to the host environment whenever a newline is
2987 written, it just says that, on such a stream, characters "are
2988 intended to be transmitted to or from the host environment as a
2989 block when a new-line character is encountered".
2991 The Visual C++ 6.0 C implementation doesn't do what is intended;
2992 even if you set a stream to be line-buffered, it still doesn't
2993 flush the buffer at the end of every line.
2995 So, if the "-l" flag was specified, we flush the standard output
2996 at the end of a packet. This will do the right thing if we're
2997 printing packet summary lines, and, as we print the entire protocol
2998 tree for a single packet without waiting for anything to happen,
2999 it should be as good as line-buffered mode if we're printing
3000 protocol trees. (The whole reason for the "-l" flag in either
3001 tcpdump or TShark is to allow the output of a live capture to
3002 be piped to a program or script and to have that script see the
3003 information for the packet as soon as it's printed, rather than
3004 having to wait until a standard I/O buffer fills up. */
3008 if (ferror(stdout)) {
3009 show_print_file_io_error(errno);
3015 if (do_dissection) {
3016 epan_dissect_cleanup(&edt);
3017 frame_data_cleanup(&fdata);
3023 write_preamble(capture_file *cf)
3025 switch (output_action) {
3028 return print_preamble(print_stream, cf ? cf->filename : NULL);
3032 write_pdml_preamble(stdout, cf->filename);
3034 write_psml_preamble(stdout);
3035 return !ferror(stdout);
3038 write_fields_preamble(output_fields, stdout);
3039 return !ferror(stdout);
3042 g_assert_not_reached();
3048 get_line_buf(size_t len)
3050 static char *line_bufp = NULL;
3051 static size_t line_buf_len = 256;
3052 size_t new_line_buf_len;
3054 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3055 new_line_buf_len *= 2)
3057 if (line_bufp == NULL) {
3058 line_buf_len = new_line_buf_len;
3059 line_bufp = g_malloc(line_buf_len + 1);
3061 if (new_line_buf_len > line_buf_len) {
3062 line_buf_len = new_line_buf_len;
3063 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3070 print_columns(capture_file *cf)
3077 line_bufp = get_line_buf(256);
3080 for (i = 0; i < cf->cinfo.num_cols; i++) {
3081 /* Skip columns not marked as visible. */
3082 if (!get_column_visible(i))
3084 switch (cf->cinfo.col_fmt[i]) {
3088 * Don't print this if we're doing a live capture from a network
3089 * interface - if we're doing a live capture, you won't be
3090 * able to look at the capture in the future (it's not being
3091 * saved anywhere), so the frame numbers are unlikely to be
3094 * (XXX - it might be nice to be able to save and print at
3095 * the same time, sort of like an "Update list of packets
3096 * in real time" capture in Wireshark.)
3098 if (global_capture_opts.ifaces->len > 0)
3101 column_len = strlen(cf->cinfo.col_data[i]);
3104 line_bufp = get_line_buf(buf_offset + column_len);
3105 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3111 case COL_ABS_DATE_TIME:
3113 case COL_UTC_DATE_TIME: /* XXX - wider */
3114 column_len = strlen(cf->cinfo.col_data[i]);
3115 if (column_len < 10)
3117 line_bufp = get_line_buf(buf_offset + column_len);
3118 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3124 case COL_DEF_DL_SRC:
3125 case COL_RES_DL_SRC:
3126 case COL_UNRES_DL_SRC:
3127 case COL_DEF_NET_SRC:
3128 case COL_RES_NET_SRC:
3129 case COL_UNRES_NET_SRC:
3130 column_len = strlen(cf->cinfo.col_data[i]);
3131 if (column_len < 12)
3133 line_bufp = get_line_buf(buf_offset + column_len);
3134 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3140 case COL_DEF_DL_DST:
3141 case COL_RES_DL_DST:
3142 case COL_UNRES_DL_DST:
3143 case COL_DEF_NET_DST:
3144 case COL_RES_NET_DST:
3145 case COL_UNRES_NET_DST:
3146 column_len = strlen(cf->cinfo.col_data[i]);
3147 if (column_len < 12)
3149 line_bufp = get_line_buf(buf_offset + column_len);
3150 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3154 column_len = strlen(cf->cinfo.col_data[i]);
3155 line_bufp = get_line_buf(buf_offset + column_len);
3156 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3159 buf_offset += column_len;
3160 if (i != cf->cinfo.num_cols - 1) {
3162 * This isn't the last column, so we need to print a
3163 * separator between this column and the next.
3165 * If we printed a network source and are printing a
3166 * network destination of the same type next, separate
3167 * them with " -> "; if we printed a network destination
3168 * and are printing a network source of the same type
3169 * next, separate them with " <- "; otherwise separate them
3172 * We add enough space to the buffer for " <- " or " -> ",
3173 * even if we're only adding " ".
3175 line_bufp = get_line_buf(buf_offset + 4);
3176 switch (cf->cinfo.col_fmt[i]) {
3181 switch (cf->cinfo.col_fmt[i + 1]) {
3186 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3191 g_strlcat(line_bufp + buf_offset, " ", 5);
3197 case COL_DEF_DL_SRC:
3198 case COL_RES_DL_SRC:
3199 case COL_UNRES_DL_SRC:
3200 switch (cf->cinfo.col_fmt[i + 1]) {
3202 case COL_DEF_DL_DST:
3203 case COL_RES_DL_DST:
3204 case COL_UNRES_DL_DST:
3205 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3210 g_strlcat(line_bufp + buf_offset, " ", 5);
3216 case COL_DEF_NET_SRC:
3217 case COL_RES_NET_SRC:
3218 case COL_UNRES_NET_SRC:
3219 switch (cf->cinfo.col_fmt[i + 1]) {
3221 case COL_DEF_NET_DST:
3222 case COL_RES_NET_DST:
3223 case COL_UNRES_NET_DST:
3224 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3229 g_strlcat(line_bufp + buf_offset, " ", 5);
3238 switch (cf->cinfo.col_fmt[i + 1]) {
3243 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3248 g_strlcat(line_bufp + buf_offset, " ", 5);
3254 case COL_DEF_DL_DST:
3255 case COL_RES_DL_DST:
3256 case COL_UNRES_DL_DST:
3257 switch (cf->cinfo.col_fmt[i + 1]) {
3259 case COL_DEF_DL_SRC:
3260 case COL_RES_DL_SRC:
3261 case COL_UNRES_DL_SRC:
3262 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3267 g_strlcat(line_bufp + buf_offset, " ", 5);
3273 case COL_DEF_NET_DST:
3274 case COL_RES_NET_DST:
3275 case COL_UNRES_NET_DST:
3276 switch (cf->cinfo.col_fmt[i + 1]) {
3278 case COL_DEF_NET_SRC:
3279 case COL_RES_NET_SRC:
3280 case COL_UNRES_NET_SRC:
3281 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3286 g_strlcat(line_bufp + buf_offset, " ", 5);
3293 g_strlcat(line_bufp + buf_offset, " ", 5);
3299 return print_line(print_stream, 0, line_bufp);
3303 print_packet(capture_file *cf, epan_dissect_t *edt)
3305 print_args_t print_args;
3308 /* Print the information in the protocol tree. */
3309 switch (output_action) {
3312 print_args.to_file = TRUE;
3313 print_args.format = print_format;
3314 print_args.print_summary = !verbose;
3315 print_args.print_hex = verbose && print_hex;
3316 print_args.print_formfeed = FALSE;
3317 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3319 /* init the packet range */
3320 packet_range_init(&print_args.range);
3322 if (!proto_tree_print(&print_args, edt, print_stream))
3325 /* "print_hex_data()" will put out a leading blank line, as well
3326 as a trailing one; print one here, to separate the packets,
3327 only if "print_hex_data()" won't be called. */
3328 if (!print_line(print_stream, 0, ""))
3334 proto_tree_write_pdml(edt, stdout);
3336 return !ferror(stdout);
3338 proto_tree_write_fields(output_fields, edt, stdout);
3340 return !ferror(stdout);
3343 /* Just fill in the columns. */
3344 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3346 /* Now print them. */
3347 switch (output_action) {
3350 if (!print_columns(cf))
3355 proto_tree_write_psml(edt, stdout);
3356 return !ferror(stdout);
3357 case WRITE_FIELDS: /*No non-verbose "fields" format */
3358 g_assert_not_reached();
3363 if (!print_hex_data(print_stream, edt))
3365 if (!print_line(print_stream, 0, ""))
3374 switch (output_action) {
3377 return print_finale(print_stream);
3381 write_pdml_finale(stdout);
3383 write_psml_finale(stdout);
3384 return !ferror(stdout);
3387 write_fields_finale(output_fields, stdout);
3388 return !ferror(stdout);
3391 g_assert_not_reached();
3397 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3401 char err_msg[2048+1];
3403 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3407 /* The open succeeded. Fill in the information for this file. */
3409 /* Cleanup all data structures used for dissection. */
3410 cleanup_dissection();
3411 /* Initialize all data structures used for dissection. */
3415 cf->f_datalen = 0; /* not used, but set it anyway */
3417 /* Set the file name because we need it to set the follow stream filter.
3418 XXX - is that still true? We need it for other reasons, though,
3420 cf->filename = g_strdup(fname);
3422 /* Indicate whether it's a permanent or temporary file. */
3423 cf->is_tempfile = is_tempfile;
3425 /* If it's a temporary capture buffer file, mark it as not saved. */
3426 cf->user_saved = !is_tempfile;
3428 cf->cd_t = wtap_file_type(cf->wth);
3430 cf->drops_known = FALSE;
3432 cf->snap = wtap_snapshot_length(cf->wth);
3433 if (cf->snap == 0) {
3434 /* Snapshot length not known. */
3435 cf->has_snap = FALSE;
3436 cf->snap = WTAP_MAX_PACKET_SIZE;
3438 cf->has_snap = TRUE;
3439 nstime_set_zero(&cf->elapsed_time);
3440 nstime_set_unset(&first_ts);
3441 nstime_set_unset(&prev_dis_ts);
3442 nstime_set_unset(&prev_cap_ts);
3444 cf->state = FILE_READ_IN_PROGRESS;
3446 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3447 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3452 g_snprintf(err_msg, sizeof err_msg,
3453 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3454 cmdarg_err("%s", err_msg);
3459 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3461 char *save_file_string;
3463 save_file_string = output_file_description(fname);
3468 cmdarg_err("Not all the packets could be written to the %s because there is "
3469 "no space left on the file system.",
3475 cmdarg_err("Not all the packets could be written to the %s because you are "
3476 "too close to, or over your disk quota.",
3481 case WTAP_ERR_CANT_CLOSE:
3482 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3486 case WTAP_ERR_SHORT_WRITE:
3487 cmdarg_err("Not all the packets could be written to the %s.",
3493 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3494 wtap_strerror(err));
3496 cmdarg_err("An error occurred while writing to the %s: %s.",
3497 save_file_string, wtap_strerror(err));
3501 g_free(save_file_string);
3505 show_print_file_io_error(int err)
3510 cmdarg_err("Not all the packets could be printed because there is "
3511 "no space left on the file system.");
3516 cmdarg_err("Not all the packets could be printed because you are "
3517 "too close to, or over your disk quota.");
3522 cmdarg_err("An error occurred while printing packets: %s.",
3529 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3533 static char errmsg_errno[1024+1];
3536 /* Wiretap error. */
3539 case WTAP_ERR_NOT_REGULAR_FILE:
3540 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3543 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3544 /* Seen only when opening a capture file for reading. */
3545 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3548 case WTAP_ERR_UNSUPPORTED:
3549 /* Seen only when opening a capture file for reading. */
3550 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3551 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3554 errmsg = errmsg_errno;
3557 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3558 /* Seen only when opening a capture file for writing. */
3559 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3560 "The file \"%%s\" is a pipe, and %s capture files can't be "
3561 "written to a pipe.", wtap_file_type_string(file_type));
3562 errmsg = errmsg_errno;
3565 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3566 /* Seen only when opening a capture file for writing. */
3567 errmsg = "TShark doesn't support writing capture files in that format.";
3570 case WTAP_ERR_UNSUPPORTED_ENCAP:
3572 errmsg = "TShark can't save this capture in that format.";
3574 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3575 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3578 errmsg = errmsg_errno;
3582 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3584 errmsg = "TShark can't save this capture in that format.";
3586 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3589 case WTAP_ERR_BAD_RECORD:
3590 /* Seen only when opening a capture file for reading. */
3591 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3592 "The file \"%%s\" appears to be damaged or corrupt.\n"
3595 errmsg = errmsg_errno;
3598 case WTAP_ERR_CANT_OPEN:
3600 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3602 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3605 case WTAP_ERR_SHORT_READ:
3606 errmsg = "The file \"%s\" appears to have been cut short"
3607 " in the middle of a packet or other data.";
3610 case WTAP_ERR_SHORT_WRITE:
3611 errmsg = "A full header couldn't be written to the file \"%s\".";
3614 case WTAP_ERR_DECOMPRESS:
3615 /* Seen only when opening a capture file for reading. */
3616 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3617 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3620 errmsg = errmsg_errno;
3624 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3625 "The file \"%%s\" could not be %s: %s.",
3626 for_writing ? "created" : "opened",
3627 wtap_strerror(err));
3628 errmsg = errmsg_errno;
3632 errmsg = file_open_error_message(err, for_writing);
3637 * Open/create errors are reported with an console message in TShark.
3640 open_failure_message(const char *filename, int err, gboolean for_writing)
3642 fprintf(stderr, "tshark: ");
3643 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3644 fprintf(stderr, "\n");
3649 * General errors are reported with an console message in TShark.
3652 failure_message(const char *msg_format, va_list ap)
3654 fprintf(stderr, "tshark: ");
3655 vfprintf(stderr, msg_format, ap);
3656 fprintf(stderr, "\n");
3660 * Read errors are reported with an console message in TShark.
3663 read_failure_message(const char *filename, int err)
3665 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3666 filename, g_strerror(err));
3670 * Write errors are reported with an console message in TShark.
3673 write_failure_message(const char *filename, int err)
3675 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3676 filename, g_strerror(err));
3680 * Print to the standard error. This is a command-line tool, so there's
3681 * no need to pop up a console.
3684 vfprintf_stderr(const char *fmt, va_list ap)
3686 vfprintf(stderr, fmt, ap);
3690 fprintf_stderr(const char *fmt, ...)
3695 vfprintf_stderr(fmt, ap);
3700 * Report an error in command-line arguments.
3703 cmdarg_err(const char *fmt, ...)
3708 failure_message(fmt, ap);
3713 * Report additional information for an error in command-line arguments.
3716 cmdarg_err_cont(const char *fmt, ...)
3721 vfprintf(stderr, fmt, ap);
3722 fprintf(stderr, "\n");