3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
55 #include "wsutil/wsgetopt.h"
59 #include <epan/epan.h>
60 #include <epan/filesystem.h>
61 #include <wsutil/privileges.h>
62 #include <wsutil/file_util.h>
65 #include <epan/timestamp.h>
66 #include <epan/packet.h>
68 #include "disabled_protos.h"
69 #include <epan/prefs.h>
70 #include <epan/column.h>
72 #include <epan/addr_resolv.h>
74 #include "clopts_common.h"
75 #include "console_io.h"
76 #include "cmdarg_err.h"
77 #include "version_info.h"
78 #include <epan/plugins.h>
80 #include <epan/epan_dissect.h>
82 #include <epan/stat_cmd_args.h>
83 #include <epan/timestamp.h>
84 #include <epan/ex-opt.h>
87 #include "capture_ui_utils.h"
88 #include "capture_ifinfo.h"
89 #include "capture-pcap-util.h"
91 #include "capture-wpcap.h"
92 #include "capture_errs.h"
93 #include <wsutil/unicode-utils.h>
95 #include "capture_sync.h"
96 #endif /* HAVE_LIBPCAP */
98 #include <epan/funnel.h>
101 * This is the template for the decode as option; it is shared between the
102 * various functions that output the usage for this parameter.
104 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
106 static guint32 cum_bytes;
107 static nstime_t first_ts;
108 static nstime_t prev_dis_ts;
109 static nstime_t prev_cap_ts;
111 static gboolean print_packet_info; /* TRUE if we're to print packet information */
113 static gboolean perform_two_pass_analysis;
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
125 static output_action_e output_action;
126 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
127 static gboolean verbose;
128 static gboolean print_hex;
129 static gboolean line_buffered;
131 static print_format_e print_format = PR_FMT_TEXT;
132 static print_stream_t *print_stream;
134 static output_fields_t* output_fields = NULL;
136 /* The line separator used between packets, changeable via the -S option */
137 static char *separator = "";
141 * TRUE if we're to print packet counts to keep track of captured packets.
143 static gboolean print_packet_counts;
145 static capture_options global_capture_opts;
148 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
149 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
152 static gboolean capture(void);
153 static void report_counts(void);
155 static BOOL WINAPI capture_cleanup(DWORD);
157 static void capture_cleanup(int);
159 static void report_counts_siginfo(int);
162 #endif /* HAVE_LIBPCAP */
164 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
165 static gboolean process_packet(capture_file *cf, gint64 offset,
166 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
167 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
168 static void show_capture_file_io_error(const char *, int, gboolean);
169 static void show_print_file_io_error(int err);
170 static gboolean write_preamble(capture_file *cf);
171 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
172 static gboolean write_finale(void);
173 static const char *cf_open_error_message(int err, gchar *err_info,
174 gboolean for_writing, int file_type);
176 static void open_failure_message(const char *filename, int err,
177 gboolean for_writing);
178 static void failure_message(const char *msg_format, va_list ap);
179 static void read_failure_message(const char *filename, int err);
180 static void write_failure_message(const char *filename, int err);
185 const char *sstr; /* The short string */
186 const char *lstr; /* The long string */
190 string_compare(gconstpointer a, gconstpointer b)
192 return strcmp(((const struct string_elem *)a)->sstr,
193 ((const struct string_elem *)b)->sstr);
197 string_elem_print(gpointer data, gpointer not_used _U_)
199 fprintf(stderr, " %s - %s\n",
200 ((struct string_elem *)data)->sstr,
201 ((struct string_elem *)data)->lstr);
205 list_capture_types(void) {
207 struct string_elem *captypes;
210 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
212 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
213 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
214 if (wtap_dump_can_open(i)) {
215 captypes[i].sstr = wtap_file_type_short_string(i);
216 captypes[i].lstr = wtap_file_type_string(i);
217 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
220 g_slist_foreach(list, string_elem_print, NULL);
226 print_usage(gboolean print_ver)
233 "TShark " VERSION "%s\n"
234 "Dump and analyze network traffic.\n"
235 "See http://www.wireshark.org for more information.\n"
238 wireshark_svnversion, get_copyright_info());
242 fprintf(output, "\n");
243 fprintf(output, "Usage: tshark [options] ...\n");
244 fprintf(output, "\n");
247 fprintf(output, "Capture interface:\n");
248 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
249 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
250 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
251 fprintf(output, " -p don't capture in promiscuous mode\n");
252 #ifdef HAVE_PCAP_CREATE
253 fprintf(output, " -I capture in monitor mode, if available\n");
255 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
256 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
258 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
259 fprintf(output, " -D print list of interfaces and exit\n");
260 fprintf(output, " -L print list of link-layer types of iface and exit\n");
261 fprintf(output, "\n");
262 fprintf(output, "Capture stop conditions:\n");
263 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
264 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
265 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
266 fprintf(output, " files:NUM - stop after NUM files\n");
267 /*fprintf(output, "\n");*/
268 fprintf(output, "Capture output:\n");
269 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
270 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
271 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
272 #endif /* HAVE_LIBPCAP */
274 /*fprintf(output, "\n");*/
275 fprintf(output, "Input file:\n");
276 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
278 fprintf(output, "\n");
279 fprintf(output, "Processing:\n");
280 fprintf(output, " -2 perform a two-pass analysis\n");
281 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
282 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
283 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
284 fprintf(output, " -d %s ...\n", decode_as_arg_template);
285 fprintf(output, " \"Decode As\", see the man page for details\n");
286 fprintf(output, " Example: tcp.port==8888,http\n");
288 /*fprintf(output, "\n");*/
289 fprintf(output, "Output:\n");
290 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
291 fprintf(output, " (or to the standard output for \"-\")\n");
292 fprintf(output, " -C <config profile> start with specified configuration profile\n");
293 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
294 fprintf(output, " an empty \"-F\" option will list the file types\n");
295 fprintf(output, " -V add output of packet tree (Packet Details)\n");
296 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
297 fprintf(output, " separated\n");
298 fprintf(output, " -P print packets even when writing to a file\n");
299 fprintf(output, " -S <separator> the line separator to print between packets\n");
300 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
301 fprintf(output, " -T pdml|ps|psml|text|fields\n");
302 fprintf(output, " format of text output (def: text)\n");
303 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
304 fprintf(output, " this option can be repeated to print multiple fields\n");
305 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
306 fprintf(output, " header=y|n switch headers on and off\n");
307 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
308 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
309 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
310 fprintf(output, " aggregator\n");
311 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
312 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
313 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
314 fprintf(output, " -l flush standard output after each packet\n");
315 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
316 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
317 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
319 fprintf(output, "\n");
320 fprintf(output, "Miscellaneous:\n");
321 fprintf(output, " -h display this help and exit\n");
322 fprintf(output, " -v display version info and exit\n");
323 fprintf(output, " -o <name>:<value> ... override preference setting\n");
324 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
325 fprintf(output, " -G [report] dump one of several available reports and exit\n");
326 fprintf(output, " default report=\"fields\"\n");
327 fprintf(output, " use \"-G ?\" for more help\n");
331 glossary_option_help(void)
337 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
339 fprintf(output, "\n");
340 fprintf(output, "Usage: tshark -G [report]\n");
341 fprintf(output, "\n");
342 fprintf(output, "Glossary table reports:\n");
343 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
344 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
345 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
346 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
347 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
348 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
349 fprintf(output, "\n");
350 fprintf(output, "Preference reports:\n");
351 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
352 fprintf(output, " -G currentprefs dump current preferences and exit\n");
353 fprintf(output, "\n");
358 * For a dissector table, print on the stream described by output,
359 * its short name (which is what's used in the "-d" option) and its
363 display_dissector_table_names(const char *table_name, const char *ui_name,
366 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
370 * For a dissector handle, print on the stream described by output,
371 * the filter name (which is what's used in the "-d" option) and the full
372 * name for the protocol that corresponds to this handle.
375 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
378 const gchar* proto_filter_name;
379 const gchar* proto_ui_name;
381 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
383 if (proto_id != -1) {
384 proto_filter_name = proto_get_protocol_filter_name(proto_id);
385 proto_ui_name = proto_get_protocol_name(proto_id);
386 g_assert(proto_filter_name != NULL);
387 g_assert(proto_ui_name != NULL);
389 fprintf((FILE *)output, "\t%s (%s)\n",
396 * The protocol_name_search structure is used by find_protocol_name_func()
397 * to pass parameters and store results
399 struct protocol_name_search{
400 gchar *searched_name; /* Protocol filter name we are looking for */
401 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
402 guint nb_match; /* How many dissectors matched searched_name */
404 typedef struct protocol_name_search *protocol_name_search_t;
407 * This function parses all dissectors associated with a table to find the
408 * one whose protocol has the specified filter name. It is called
409 * as a reference function in a call to dissector_table_foreach_handle.
410 * The name we are looking for, as well as the results, are stored in the
411 * protocol_name_search struct pointed to by user_data.
412 * If called using dissector_table_foreach_handle, we actually parse the
413 * whole list of dissectors.
416 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
420 const gchar *protocol_filter_name;
421 protocol_name_search_t search_info;
425 search_info = (protocol_name_search_t)user_data;
427 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
428 if (proto_id != -1) {
429 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
430 g_assert(protocol_filter_name != NULL);
431 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
433 if (search_info->nb_match == 0) {
434 /* Record this handle only if this is the first match */
435 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
437 search_info->nb_match++;
443 * Print all layer type names supported.
444 * We send the output to the stream described by the handle output.
448 fprint_all_layer_types(FILE *output)
451 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
455 * Print all protocol names supported for a specific layer type.
456 * table_name contains the layer type name in which the search is performed.
457 * We send the output to the stream described by the handle output.
461 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
464 dissector_table_foreach_handle(table_name,
465 display_dissector_names,
470 * The function below parses the command-line parameters for the decode as
471 * feature (a string pointer by cl_param).
472 * It checks the format of the command-line, searches for a matching table
473 * and dissector. If a table/dissector match is not found, we display a
474 * summary of the available tables/dissectors (on stderr) and return FALSE.
475 * If everything is fine, we get the "Decode as" preference activated,
476 * then we return TRUE.
479 add_decode_as(const gchar *cl_param)
483 gchar *decoded_param;
484 gchar *remaining_param;
486 gchar *dissector_str;
487 dissector_handle_t dissector_matching;
488 dissector_table_t table_matching;
489 ftenum_t dissector_table_selector_type;
490 struct protocol_name_search user_protocol_name;
492 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
495 decoded_param = g_strdup(cl_param);
496 g_assert(decoded_param);
499 /* The lines below will parse this string (modifying it) to extract all
500 necessary information. Note that decoded_param is still needed since
501 strings are not copied - we just save pointers. */
503 /* This section extracts a layer type (table_name) from decoded_param */
504 table_name = decoded_param; /* Layer type string starts from beginning */
506 remaining_param = strchr(table_name, '=');
507 if (remaining_param == NULL) {
508 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
509 /* If the argument does not follow the template, carry on anyway to check
510 if the table name is at least correct. If remaining_param is NULL,
511 we'll exit anyway further down */
514 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
517 /* Remove leading and trailing spaces from the table name */
518 while ( table_name[0] == ' ' )
520 while ( table_name[strlen(table_name) - 1] == ' ' )
521 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
523 /* The following part searches a table matching with the layer type specified */
524 table_matching = NULL;
526 /* Look for the requested table */
527 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
528 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
531 table_matching = find_dissector_table(table_name);
532 if (!table_matching) {
533 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
537 if (!table_matching) {
538 /* Display a list of supported layer types to help the user, if the
539 specified layer type was not found */
540 cmdarg_err("Valid layer types are:");
541 fprint_all_layer_types(stderr);
543 if (remaining_param == NULL || !table_matching) {
544 /* Exit if the layer type was not found, or if no '=' separator was found
546 g_free(decoded_param);
550 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
551 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
554 remaining_param++; /* Move to the second '=' */
555 *remaining_param = '\0'; /* Remove the second '=' */
557 remaining_param++; /* Position after the layer type string */
559 /* This section extracts a selector value (selector_str) from decoded_param */
561 selector_str = remaining_param; /* Next part starts with the selector number */
563 remaining_param = strchr(selector_str, ',');
564 if (remaining_param == NULL) {
565 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
566 /* If the argument does not follow the template, carry on anyway to check
567 if the selector value is at least correct. If remaining_param is NULL,
568 we'll exit anyway further down */
571 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
574 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
576 switch (dissector_table_selector_type) {
582 /* The selector for this table is an unsigned number. Parse it as such.
583 There's no need to remove leading and trailing spaces from the
584 selector number string, because sscanf will do that for us. */
585 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
586 cmdarg_err("Invalid selector number \"%s\"", selector_str);
587 g_free(decoded_param);
594 /* The selector for this table is a string. */
598 /* There are currently no dissector tables with any types other
599 than the ones listed above. */
600 g_assert_not_reached();
603 if (remaining_param == NULL) {
604 /* Exit if no ',' separator was found (see above) */
605 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
606 fprint_all_protocols_for_layer_types(stderr, table_name);
607 g_free(decoded_param);
611 remaining_param++; /* Position after the selector number string */
613 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
615 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
617 /* Remove leading and trailing spaces from the dissector name */
618 while ( dissector_str[0] == ' ' )
620 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
621 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
623 dissector_matching = NULL;
625 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
626 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 */
627 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
630 user_protocol_name.nb_match = 0;
631 user_protocol_name.searched_name = dissector_str;
632 user_protocol_name.matched_handle = NULL;
634 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 */
636 if (user_protocol_name.nb_match != 0) {
637 dissector_matching = user_protocol_name.matched_handle;
638 if (user_protocol_name.nb_match > 1) {
639 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
643 /* OK, check whether the problem is that there isn't any such
644 protocol, or that there is but it's not specified as a protocol
645 that's valid for that dissector table.
646 Note, we don't exit here, but dissector_matching will remain NULL,
648 if (proto_get_id_by_filter_name(dissector_str) == -1) {
649 /* No such protocol */
650 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
652 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
653 dissector_str, table_name);
658 if (!dissector_matching) {
659 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
660 fprint_all_protocols_for_layer_types(stderr, table_name);
661 g_free(decoded_param);
665 /* This is the end of the code that parses the command-line options.
666 All information is now stored in the variables:
670 The above variables that are strings are still pointing to areas within
671 decoded_parm. decoded_parm thus still needs to be kept allocated in
672 until we stop needing these variables
673 decoded_param will be deallocated at each exit point of this function */
676 /* We now have a pointer to the handle for the requested dissector
677 (requested protocol) inside the variable dissector_matching */
678 switch (dissector_table_selector_type) {
684 /* The selector for this table is an unsigned number. */
685 dissector_change_uint(table_name, selector, dissector_matching);
690 /* The selector for this table is a string. */
691 dissector_change_string(table_name, selector_str, dissector_matching);
695 /* There are currently no dissector tables with any types other
696 than the ones listed above. */
697 g_assert_not_reached();
699 g_free(decoded_param); /* "Decode As" rule has been successfully added */
704 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
705 const gchar *message, gpointer user_data)
707 /* ignore log message, if log_level isn't interesting based
708 upon the console log preferences.
709 If the preferences haven't been loaded loaded yet, display the
712 The default console_log_level preference value is such that only
713 ERROR, CRITICAL and WARNING level messages are processed;
714 MESSAGE, INFO and DEBUG level messages are ignored.
716 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
717 ERROR and CRITICAL level messages so the current code is a behavioral
718 change. The current behavior is the same as in Wireshark.
720 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
721 prefs.console_log_level != 0) {
725 g_log_default_handler(log_domain, log_level, message, user_data);
730 output_file_description(const char *fname)
732 char *save_file_string;
734 /* Get a string that describes what we're writing to */
735 if (strcmp(fname, "-") == 0) {
736 /* We're writing to the standard output */
737 save_file_string = g_strdup("standard output");
739 /* We're writing to a file with the name in save_file */
740 save_file_string = g_strdup_printf("file \"%s\"", fname);
742 return save_file_string;
746 print_current_user(void) {
747 gchar *cur_user, *cur_group;
748 if (started_with_special_privs()) {
749 cur_user = get_cur_username();
750 cur_group = get_cur_groupname();
751 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
752 cur_user, cur_group);
755 if (running_with_special_privs()) {
756 fprintf(stderr, " This could be dangerous.");
758 fprintf(stderr, "\n");
763 check_capture_privs(void) {
766 /* Warn the user if npf.sys isn't loaded. */
767 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
768 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
769 "capturing or\nlisting interfaces.\n");
775 show_version(GString *comp_info_str, GString *runtime_info_str)
777 printf("TShark " VERSION "%s\n"
784 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
785 runtime_info_str->str);
789 main(int argc, char *argv[])
791 char *init_progfile_dir_error;
793 gboolean arg_error = FALSE;
799 char *gpf_path, *pf_path;
800 char *gdp_path, *dp_path;
801 int gpf_open_errno, gpf_read_errno;
802 int pf_open_errno, pf_read_errno;
803 int gdp_open_errno, gdp_read_errno;
804 int dp_open_errno, dp_read_errno;
808 gboolean list_link_layer_types = FALSE;
809 gboolean start_capture = FALSE;
814 interface_options interface_opts;
816 gboolean capture_option_specified = FALSE;
818 gboolean quiet = FALSE;
819 #ifdef PCAP_NG_DEFAULT
820 int out_file_type = WTAP_FILE_PCAPNG;
822 int out_file_type = WTAP_FILE_PCAP;
824 gboolean out_file_name_res = FALSE;
825 gchar *cf_name = NULL, *rfilter = NULL;
826 #ifdef HAVE_PCAP_OPEN_DEAD
827 struct bpf_program fcode;
829 dfilter_t *rfcode = NULL;
832 GLogLevelFlags log_flags;
834 gchar *output_only = NULL;
837 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
838 #define OPTSTRING_B "B:"
840 #define OPTSTRING_B ""
841 #endif /* _WIN32 or HAVE_PCAP_CREATE */
842 #else /* HAVE_LIBPCAP */
843 #define OPTSTRING_B ""
844 #endif /* HAVE_LIBPCAP */
846 #ifdef HAVE_PCAP_CREATE
847 #define OPTSTRING_I "I"
849 #define OPTSTRING_I ""
852 #define OPTSTRING "2a:A:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:S:t:T:u:vVw:W:xX:y:z:"
854 static const char optstring[] = OPTSTRING;
857 arg_list_utf_16to8(argc, argv);
861 * Get credential information for later use.
863 init_process_policies();
866 * Attempt to get the pathname of the executable file.
868 init_progfile_dir_error = init_progfile_dir(argv[0], main);
869 if (init_progfile_dir_error != NULL) {
870 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
871 init_progfile_dir_error);
875 * In order to have the -X opts assigned before the wslua machine starts
876 * we need to call getopts before epan_init() gets called.
879 optind_initial = optind;
881 while ((opt = getopt(argc, argv, optstring)) != -1) {
883 case 'C': /* Configuration Profile */
884 if (profile_exists (optarg, FALSE)) {
885 set_profile_name (optarg);
887 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
899 optind = optind_initial;
904 /** Send All g_log messages to our own handler **/
908 G_LOG_LEVEL_CRITICAL|
913 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
915 g_log_set_handler(NULL,
917 tshark_log_handler, NULL /* user_data */);
918 g_log_set_handler(LOG_DOMAIN_MAIN,
920 tshark_log_handler, NULL /* user_data */);
923 g_log_set_handler(LOG_DOMAIN_CAPTURE,
925 tshark_log_handler, NULL /* user_data */);
926 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
928 tshark_log_handler, NULL /* user_data */);
931 initialize_funnel_ops();
934 capture_opts_init(&global_capture_opts, &cfile);
937 timestamp_set_type(TS_RELATIVE);
938 timestamp_set_precision(TS_PREC_AUTO);
939 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
941 /* Register all dissectors; we must do this before checking for the
942 "-G" flag, as the "-G" flag dumps information registered by the
943 dissectors, and we must do it before we read the preferences, in
944 case any dissectors register preferences. */
945 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
946 failure_message, open_failure_message, read_failure_message,
947 write_failure_message);
949 /* Register all tap listeners; we do this before we parse the arguments,
950 as the "-z" argument can specify a registered tap. */
952 /* we register the plugin taps before the other taps because
953 stats_tree taps plugins will be registered as tap listeners
954 by stats_tree_stat.c and need to registered before that */
956 register_all_plugin_tap_listeners();
958 register_all_tap_listeners();
960 /* Now register the preferences for any non-dissector modules.
961 We must do that before we read the preferences as well. */
962 prefs_register_modules();
964 /* If invoked with the "-G" flag, we dump out information based on
965 the argument to the "-G" flag; if no argument is specified,
966 for backwards compatibility we dump out a glossary of display
969 XXX - we do this here, for now, to support "-G" with no arguments.
970 If none of our build or other processes uses "-G" with no arguments,
971 we can just process it with the other arguments. */
972 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
973 proto_initialize_all_prefixes();
976 proto_registrar_dump_fields(1);
978 if (strcmp(argv[2], "fields") == 0)
979 proto_registrar_dump_fields(1);
980 else if (strcmp(argv[2], "fields2") == 0)
981 proto_registrar_dump_fields(2);
982 else if (strcmp(argv[2], "fields3") == 0)
983 proto_registrar_dump_fields(3);
984 else if (strcmp(argv[2], "protocols") == 0)
985 proto_registrar_dump_protocols();
986 else if (strcmp(argv[2], "values") == 0)
987 proto_registrar_dump_values();
988 else if (strcmp(argv[2], "decodes") == 0)
989 dissector_dump_decodes();
990 else if (strcmp(argv[2], "defaultprefs") == 0)
992 else if (strcmp(argv[2], "plugins") == 0)
994 else if (strcmp(argv[2], "?") == 0)
995 glossary_option_help();
996 else if (strcmp(argv[2], "-?") == 0)
997 glossary_option_help();
998 else if (strcmp(argv[2], "currentprefs") == 0) {
999 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1000 &pf_open_errno, &pf_read_errno, &pf_path);
1003 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1010 /* Set the C-language locale to the native environment. */
1011 setlocale(LC_ALL, "");
1013 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1014 &pf_open_errno, &pf_read_errno, &pf_path);
1015 if (gpf_path != NULL) {
1016 if (gpf_open_errno != 0) {
1017 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1018 pf_path, g_strerror(gpf_open_errno));
1020 if (gpf_read_errno != 0) {
1021 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1022 pf_path, g_strerror(gpf_read_errno));
1025 if (pf_path != NULL) {
1026 if (pf_open_errno != 0) {
1027 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1028 g_strerror(pf_open_errno));
1030 if (pf_read_errno != 0) {
1031 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1032 pf_path, g_strerror(pf_read_errno));
1038 /* Set the name resolution code's flags from the preferences. */
1039 gbl_resolv_flags = prefs_p->name_resolve;
1041 /* Read the disabled protocols file. */
1042 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1043 &dp_path, &dp_open_errno, &dp_read_errno);
1044 if (gdp_path != NULL) {
1045 if (gdp_open_errno != 0) {
1046 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1047 gdp_path, g_strerror(gdp_open_errno));
1049 if (gdp_read_errno != 0) {
1050 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1051 gdp_path, g_strerror(gdp_read_errno));
1055 if (dp_path != NULL) {
1056 if (dp_open_errno != 0) {
1058 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1059 g_strerror(dp_open_errno));
1061 if (dp_read_errno != 0) {
1063 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1064 g_strerror(dp_read_errno));
1069 check_capture_privs();
1071 cap_file_init(&cfile);
1073 /* Print format defaults to this. */
1074 print_format = PR_FMT_TEXT;
1076 output_fields = output_fields_new();
1078 /* Now get our args */
1079 while ((opt = getopt(argc, argv, optstring)) != -1) {
1081 case '2': /* Perform two pass analysis */
1082 perform_two_pass_analysis = TRUE;
1084 case 'a': /* autostop criteria */
1085 case 'b': /* Ringbuffer option */
1086 case 'c': /* Capture x packets */
1087 case 'f': /* capture filter */
1088 case 'i': /* Use interface x */
1089 case 'p': /* Don't capture in promiscuous mode */
1090 #ifdef HAVE_PCAP_CREATE
1091 case 'I': /* Capture in monitor mode, if available */
1093 case 's': /* Set the snapshot (capture) length */
1094 case 'w': /* Write to capture file x */
1095 case 'y': /* Set the pcap data link type */
1096 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1097 case 'B': /* Buffer size */
1098 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1100 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1105 capture_option_specified = TRUE;
1110 /* Configuration profile settings were already processed just ignore them this time*/
1112 case 'd': /* Decode as rule */
1113 if (!add_decode_as(optarg))
1116 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1117 case 'K': /* Kerberos keytab file */
1118 read_keytab_file(optarg);
1121 case 'D': /* Print a list of capture devices and exit */
1123 if_list = capture_interface_list(&err, &err_str);
1124 if (if_list == NULL) {
1126 case CANT_GET_INTERFACE_LIST:
1127 cmdarg_err("%s", err_str);
1131 case NO_INTERFACES_FOUND:
1132 cmdarg_err("There are no interfaces on which a capture can be done");
1137 capture_opts_print_interfaces(if_list);
1138 free_interface_list(if_list);
1141 capture_option_specified = TRUE;
1147 output_fields_add(output_fields, optarg);
1151 if(!output_fields_set_option(output_fields, optarg)) {
1152 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1153 output_fields_list_options(stderr);
1158 out_file_type = wtap_short_string_to_file_type(optarg);
1159 if (out_file_type < 0) {
1160 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1161 list_capture_types();
1165 case 'W': /* Select extra information to save in our capture file */
1166 /* This is patterned after the -N flag which may not be the best idea. */
1167 if (strchr(optarg, 'n'))
1168 out_file_name_res = TRUE;
1170 case 'H': /* Read address to name mappings from a hosts file */
1171 if (! read_hosts_file(optarg))
1173 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1176 out_file_name_res = TRUE;
1179 case 'h': /* Print help and exit */
1183 case 'l': /* "Line-buffer" standard output */
1184 /* This isn't line-buffering, strictly speaking, it's just
1185 flushing the standard output after the information for
1186 each packet is printed; however, that should be good
1187 enough for all the purposes to which "-l" is put (and
1188 is probably actually better for "-V", as it does fewer
1191 See the comment in "process_packet()" for an explanation of
1192 why we do that, and why we don't just use "setvbuf()" to
1193 make the standard output line-buffered (short version: in
1194 Windows, "line-buffered" is the same as "fully-buffered",
1195 and the output buffer is only flushed when it fills up). */
1196 line_buffered = TRUE;
1198 case 'L': /* Print list of link-layer types and exit */
1200 list_link_layer_types = TRUE;
1202 capture_option_specified = TRUE;
1206 case 'n': /* No name resolution */
1207 gbl_resolv_flags = RESOLV_NONE;
1209 case 'N': /* Select what types of addresses/port #s to resolve */
1210 if (gbl_resolv_flags == RESOLV_ALL)
1211 gbl_resolv_flags = RESOLV_NONE;
1212 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1213 if (badopt != '\0') {
1214 cmdarg_err("-N specifies unknown resolving option '%c';",
1216 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1220 case 'o': /* Override preference from command line */
1221 switch (prefs_set_pref(optarg)) {
1226 case PREFS_SET_SYNTAX_ERR:
1227 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1231 case PREFS_SET_NO_SUCH_PREF:
1232 case PREFS_SET_OBSOLETE:
1233 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1238 case 'q': /* Quiet */
1241 case 'r': /* Read capture file x */
1242 cf_name = g_strdup(optarg);
1244 case 'R': /* Read file filter */
1247 case 'P': /* Print packets even when writing to a file */
1248 print_packet_info = TRUE;
1250 case 'S': /* Set the line Separator to be printed between packets */
1251 separator = strdup(optarg);
1253 case 't': /* Time stamp type */
1254 if (strcmp(optarg, "r") == 0)
1255 timestamp_set_type(TS_RELATIVE);
1256 else if (strcmp(optarg, "a") == 0)
1257 timestamp_set_type(TS_ABSOLUTE);
1258 else if (strcmp(optarg, "ad") == 0)
1259 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1260 else if (strcmp(optarg, "d") == 0)
1261 timestamp_set_type(TS_DELTA);
1262 else if (strcmp(optarg, "dd") == 0)
1263 timestamp_set_type(TS_DELTA_DIS);
1264 else if (strcmp(optarg, "e") == 0)
1265 timestamp_set_type(TS_EPOCH);
1266 else if (strcmp(optarg, "u") == 0)
1267 timestamp_set_type(TS_UTC);
1268 else if (strcmp(optarg, "ud") == 0)
1269 timestamp_set_type(TS_UTC_WITH_DATE);
1271 cmdarg_err("Invalid time stamp type \"%s\"",
1273 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1274 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1278 case 'T': /* printing Type */
1279 if (strcmp(optarg, "text") == 0) {
1280 output_action = WRITE_TEXT;
1281 print_format = PR_FMT_TEXT;
1282 } else if (strcmp(optarg, "ps") == 0) {
1283 output_action = WRITE_TEXT;
1284 print_format = PR_FMT_PS;
1285 } else if (strcmp(optarg, "pdml") == 0) {
1286 output_action = WRITE_XML;
1288 } else if (strcmp(optarg, "psml") == 0) {
1289 output_action = WRITE_XML;
1291 } else if(strcmp(optarg, "fields") == 0) {
1292 output_action = WRITE_FIELDS;
1293 verbose = TRUE; /* Need full tree info */
1295 cmdarg_err("Invalid -T parameter.");
1296 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1300 case 'u': /* Seconds type */
1301 if (strcmp(optarg, "s") == 0)
1302 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1303 else if (strcmp(optarg, "hms") == 0)
1304 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1306 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1307 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1311 case 'v': /* Show version and exit */
1313 GString *comp_info_str;
1314 GString *runtime_info_str;
1315 /* Assemble the compile-time version information string */
1316 comp_info_str = g_string_new("Compiled ");
1317 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1319 /* Assemble the run-time version information string */
1320 runtime_info_str = g_string_new("Running ");
1321 get_runtime_version_info(runtime_info_str, NULL);
1322 show_version(comp_info_str, runtime_info_str);
1323 g_string_free(comp_info_str, TRUE);
1324 g_string_free(runtime_info_str, TRUE);
1328 case 'O': /* Only output these protocols */
1329 output_only = g_strdup(optarg);
1331 case 'V': /* Verbose */
1333 /* The user asked for a verbose output, so let's ensure they get it,
1334 * even if they're writing to a file.
1336 print_packet_info = TRUE;
1338 case 'x': /* Print packet data in hex (and ASCII) */
1340 /* The user asked for hex output, so let's ensure they get it,
1341 * even if they're writing to a file.
1343 print_packet_info = TRUE;
1348 /* We won't call the init function for the stat this soon
1349 as it would disallow MATE's fields (which are registered
1350 by the preferences set callback) from being used as
1351 part of a tap filter. Instead, we just add the argument
1352 to a list of stat arguments. */
1353 if (!process_stat_cmd_arg(optarg)) {
1354 cmdarg_err("invalid -z argument.");
1355 cmdarg_err_cont(" -z argument must be one of :");
1356 list_stat_cmd_args();
1361 case '?': /* Bad flag - print usage message */
1364 list_capture_types();
1374 /* If we specified output fields, but not the output field type... */
1375 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1376 cmdarg_err("Output fields were specified with \"-e\", "
1377 "but \"-Tfields\" was not specified.");
1379 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1380 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1381 "specified with \"-e\".");
1386 /* If no capture filter or read filter has been specified, and there are
1387 still command-line arguments, treat them as the tokens of a capture
1388 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1389 flag was specified. */
1390 if (optind < argc) {
1391 if (cf_name != NULL) {
1392 if (rfilter != NULL) {
1393 cmdarg_err("Read filters were specified both with \"-R\" "
1394 "and with additional command-line arguments.");
1397 rfilter = get_args_as_string(argc, argv, optind);
1400 if (global_capture_opts.default_options.cfilter) {
1401 cmdarg_err("A default capture filter was specified both with \"-f\""
1402 " and with additional command-line arguments.");
1405 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1406 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1407 if (interface_opts.cfilter == NULL) {
1408 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1409 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1410 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1412 cmdarg_err("A capture filter was specified both with \"-f\""
1413 " and with additional command-line arguments.");
1417 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1419 capture_option_specified = TRUE;
1425 if (!global_capture_opts.saving_to_file) {
1426 /* We're not saving the capture to a file; if "-q" wasn't specified,
1427 we should print packet information */
1429 print_packet_info = TRUE;
1431 /* We're saving to a file; if we're writing to the standard output.
1432 and we'll also be writing dissected packets to the standard
1433 output, reject the request. At best, we could redirect that
1434 to the standard error; we *can't* write both to the standard
1435 output and have either of them be useful. */
1436 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1437 cmdarg_err("You can't write both raw packet data and dissected packets"
1438 " to the standard output.");
1443 /* We're not saving the capture to a file; if "-q" wasn't specified,
1444 we should print packet information */
1446 print_packet_info = TRUE;
1449 #ifndef HAVE_LIBPCAP
1450 if (capture_option_specified)
1451 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1458 /* We don't support capture filters when reading from a capture file
1459 (the BPF compiler doesn't support all link-layer types that we
1460 support in capture files we read). */
1462 if (cf_name != NULL) {
1463 if (global_capture_opts.default_options.cfilter) {
1464 cmdarg_err("Only read filters, not capture filters, "
1465 "can be specified when reading a capture file.");
1472 if (output_action != WRITE_TEXT) {
1473 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1478 if (output_only != NULL) {
1482 cmdarg_err("-O requires -V");
1486 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1487 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1488 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1493 if (list_link_layer_types) {
1494 /* We're supposed to list the link-layer types for an interface;
1495 did the user also specify a capture file to be read? */
1497 /* Yes - that's bogus. */
1498 cmdarg_err("You can't specify -L and a capture file to be read.");
1501 /* No - did they specify a ring buffer option? */
1502 if (global_capture_opts.multi_files_on) {
1503 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1509 * "-r" was specified, so we're reading a capture file.
1510 * Capture options don't apply here.
1512 if (global_capture_opts.multi_files_on) {
1513 cmdarg_err("Multiple capture files requested, but "
1514 "a capture isn't being done.");
1517 if (global_capture_opts.has_file_duration) {
1518 cmdarg_err("Switching capture files after a time interval was specified, but "
1519 "a capture isn't being done.");
1522 if (global_capture_opts.has_ring_num_files) {
1523 cmdarg_err("A ring buffer of capture files was specified, but "
1524 "a capture isn't being done.");
1527 if (global_capture_opts.has_autostop_files) {
1528 cmdarg_err("A maximum number of capture files was specified, but "
1529 "a capture isn't being done.");
1533 /* Note: TShark now allows the restriction of a _read_ file by packet count
1534 * and byte count as well as a write file. Other autostop options remain valid
1535 * only for a write file.
1537 if (global_capture_opts.has_autostop_duration) {
1538 cmdarg_err("A maximum capture time was specified, but "
1539 "a capture isn't being done.");
1544 * "-r" wasn't specified, so we're doing a live capture.
1546 if (global_capture_opts.saving_to_file) {
1547 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1549 /* When capturing, we only support writing pcap or pcap-ng format. */
1550 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1551 cmdarg_err("Live captures can only be saved in libpcap format.");
1554 if (global_capture_opts.multi_files_on) {
1555 /* Multiple-file mode doesn't work under certain conditions:
1556 a) it doesn't work if you're writing to the standard output;
1557 b) it doesn't work if you're writing to a pipe;
1559 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1560 cmdarg_err("Multiple capture files requested, but "
1561 "the capture is being written to the standard output.");
1564 if (global_capture_opts.output_to_pipe) {
1565 cmdarg_err("Multiple capture files requested, but "
1566 "the capture file is a pipe.");
1569 if (!global_capture_opts.has_autostop_filesize &&
1570 !global_capture_opts.has_file_duration) {
1571 cmdarg_err("Multiple capture files requested, but "
1572 "no maximum capture file size or duration was specified.");
1576 /* Currently, we don't support read filters when capturing
1577 and saving the packets. */
1578 if (rfilter != NULL) {
1579 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1583 /* They didn't specify a "-w" flag, so we won't be saving to a
1584 capture file. Check for options that only make sense if
1585 we're saving to a file. */
1586 if (global_capture_opts.has_autostop_filesize) {
1587 cmdarg_err("Maximum capture file size specified, but "
1588 "capture isn't being saved to a file.");
1591 if (global_capture_opts.multi_files_on) {
1592 cmdarg_err("Multiple capture files requested, but "
1593 "the capture isn't being saved to a file.");
1602 /* Start windows sockets */
1603 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1606 /* Notify all registered modules that have had any of their preferences
1607 changed either from one of the preferences file or from the command
1608 line that their preferences have changed. */
1611 /* At this point MATE will have registered its field array so we can
1612 have a tap filter with one of MATE's late-registered fields as part
1613 of the filter. We can now process all the "-z" arguments. */
1614 start_requested_stats();
1617 /* We currently don't support taps, or printing dissected packets,
1618 if we're writing to a pipe. */
1619 if (global_capture_opts.saving_to_file &&
1620 global_capture_opts.output_to_pipe) {
1621 if (tap_listeners_require_dissection()) {
1622 cmdarg_err("Taps aren't supported when saving to a pipe.");
1625 if (print_packet_info) {
1626 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1632 /* disabled protocols as per configuration file */
1633 if (gdp_path == NULL && dp_path == NULL) {
1634 set_disabled_protos_list();
1637 /* Build the column format array */
1638 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1641 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1642 capture_opts_trim_ring_num_files(&global_capture_opts);
1645 if (rfilter != NULL) {
1646 if (!dfilter_compile(rfilter, &rfcode)) {
1647 cmdarg_err("%s", dfilter_error_msg);
1649 #ifdef HAVE_PCAP_OPEN_DEAD
1653 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1655 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1657 " Note: That display filter code looks like a valid capture filter;");
1659 " maybe you mixed them up?");
1668 cfile.rfcode = rfcode;
1670 if (print_packet_info) {
1671 /* If we're printing as text or PostScript, we have
1672 to create a print stream. */
1673 if (output_action == WRITE_TEXT) {
1674 switch (print_format) {
1677 print_stream = print_stream_text_stdio_new(stdout);
1681 print_stream = print_stream_ps_stdio_new(stdout);
1685 g_assert_not_reached();
1690 /* We have to dissect each packet if:
1692 we're printing information about each packet;
1694 we're using a read filter on the packets;
1696 we're using any taps that need dissection. */
1697 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1701 * We're reading a capture file.
1705 * Immediately relinquish any special privileges we have; we must not
1706 * be allowed to read any capture files the user running TShark
1709 relinquish_special_privs_perm();
1710 print_current_user();
1712 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1717 /* Set timestamp precision; there should arguably be a command-line
1718 option to let the user set this. */
1719 switch(wtap_file_tsprecision(cfile.wth)) {
1720 case(WTAP_FILE_TSPREC_SEC):
1721 timestamp_set_precision(TS_PREC_AUTO_SEC);
1723 case(WTAP_FILE_TSPREC_DSEC):
1724 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1726 case(WTAP_FILE_TSPREC_CSEC):
1727 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1729 case(WTAP_FILE_TSPREC_MSEC):
1730 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1732 case(WTAP_FILE_TSPREC_USEC):
1733 timestamp_set_precision(TS_PREC_AUTO_USEC);
1735 case(WTAP_FILE_TSPREC_NSEC):
1736 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1739 g_assert_not_reached();
1742 /* Process the packets in the file */
1744 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1745 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1746 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1748 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1751 /* We still dump out the results of taps, etc., as we might have
1752 read some packets; however, we exit with an error status. */
1756 /* No capture file specified, so we're supposed to do a live capture
1757 (or get a list of link-layer types for a live capture device);
1758 do we have support for live captures? */
1765 cmdarg_err("WinPcap couldn't be found.");
1766 detailed_err = cant_load_winpcap_err("TShark");
1767 cmdarg_err_cont("%s", detailed_err);
1768 g_free(detailed_err);
1773 /* trim the interface name and exit if that failed */
1774 if (!capture_opts_trim_iface(&global_capture_opts,
1775 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1779 /* if requested, list the link layer types and exit */
1780 if (list_link_layer_types) {
1782 interface_options interface_opts;
1784 /* Get the list of link-layer types for the capture devices. */
1785 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1786 if_capabilities_t *caps;
1788 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1789 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1791 cmdarg_err("%s", err_str);
1795 if (caps->data_link_types == NULL) {
1796 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1799 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1800 free_if_capabilities(caps);
1805 if (print_packet_info) {
1806 if (!write_preamble(NULL)) {
1807 show_print_file_io_error(errno);
1810 } else if (!quiet) {
1812 * We're not printing information for each packet, and the user
1813 * didn't ask us not to print a count of packets as they arrive,
1814 * so print that count so the user knows that packets are arriving.
1816 * XXX - what if the user wants to do a live capture, doesn't want
1817 * to save it to a file, doesn't want information printed for each
1818 * packet, does want some "-z" statistic, and wants packet counts
1819 * so they know whether they're seeing any packets?
1821 print_packet_counts = TRUE;
1824 /* For now, assume libpcap gives microsecond precision. */
1825 timestamp_set_precision(TS_PREC_AUTO_USEC);
1828 * XXX - this returns FALSE if an error occurred, but it also
1829 * returns FALSE if the capture stops because a time limit
1830 * was reached (and possibly other limits), so we can't assume
1831 * it means an error.
1833 * The capture code is a bit twisty, so it doesn't appear to
1834 * be an easy fix. We just ignore the return value for now.
1835 * Instead, pass on the exit status from the capture child.
1838 exit_status = global_capture_opts.fork_child_status;
1840 if (print_packet_info) {
1841 if (!write_finale()) {
1843 show_print_file_io_error(err);
1847 /* No - complain. */
1848 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1855 if (cfile.frames != NULL) {
1856 free_frame_data_sequence(cfile.frames);
1857 cfile.frames = NULL;
1860 draw_tap_listeners(TRUE);
1861 funnel_dump_all_text_windows();
1864 output_fields_free(output_fields);
1865 output_fields = NULL;
1870 /*#define USE_BROKEN_G_MAIN_LOOP*/
1872 #ifdef USE_BROKEN_G_MAIN_LOOP
1875 gboolean loop_running = FALSE;
1877 guint32 packet_count = 0;
1880 /* XXX - move to the right position / file */
1881 /* read from a pipe (callback) */
1882 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1884 typedef struct pipe_input_tag {
1888 pipe_input_cb_t input_cb;
1889 guint pipe_input_id;
1891 GStaticMutex callback_running;
1895 static pipe_input_t pipe_input;
1898 /* The timer has expired, see if there's stuff to read from the pipe,
1899 if so, do the callback */
1901 pipe_timer_cb(gpointer data)
1905 gboolean result, result1;
1907 pipe_input_t *pipe_input_p = data;
1908 gint iterations = 0;
1911 g_static_mutex_lock (&pipe_input_p->callback_running);
1913 /* try to read data from the pipe only 5 times, to avoid blocking */
1914 while(iterations < 5) {
1915 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1917 /* Oddly enough although Named pipes don't work on win9x,
1918 PeekNamedPipe does !!! */
1919 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1920 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1922 /* Get the child process exit status */
1923 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1926 /* If the Peek returned an error, or there are bytes to be read
1927 or the childwatcher thread has terminated then call the normal
1929 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1931 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1933 /* And call the real handler */
1934 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1935 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1936 /* pipe closed, return false so that the timer is stopped */
1937 g_static_mutex_unlock (&pipe_input_p->callback_running);
1942 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1943 /* No data, stop now */
1950 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1952 g_static_mutex_unlock (&pipe_input_p->callback_running);
1954 /* we didn't stopped the timer, so let it run */
1961 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1964 pipe_input.source = source;
1965 pipe_input.child_process = child_process;
1966 pipe_input.user_data = user_data;
1967 pipe_input.input_cb = input_cb;
1970 g_static_mutex_init(&pipe_input.callback_running);
1971 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1972 do this but that doesn't cover all win32 platforms. GTK can do
1973 this but doesn't seem to work over processes. Attempt to do
1974 something similar here, start a timer and check for data on every
1976 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1977 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1988 GString *str = g_string_new("");
1989 #ifdef USE_TSHARK_SELECT
1993 struct sigaction action, oldaction;
1997 * XXX - dropping privileges is still required, until code cleanup is done
1999 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2000 * when it's done, we don't need special privileges to run tshark at all,
2001 * therefore we don't need to drop these privileges
2002 * The only thing we might want to keep is a warning if tshark is run as root,
2003 * as it's no longer necessary and potentially dangerous.
2005 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2006 * We've opened the capture device, so we shouldn't need any special
2007 * privileges any more; relinquish those privileges.
2009 * XXX - if we have saved set-user-ID support, we should give up those
2010 * privileges immediately, and then reclaim them long enough to get
2011 * a list of network interfaces and to open one, and then give them
2012 * up again, so that stuff we do while processing the argument list,
2013 * reading the user's preferences, loading and starting plugins
2014 * (especially *user* plugins), etc. is done with the user's privileges,
2015 * not special privileges.
2017 relinquish_special_privs_perm();
2018 print_current_user();
2020 /* Cleanup all data structures used for dissection. */
2021 cleanup_dissection();
2022 /* Initialize all data structures used for dissection. */
2026 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2027 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2029 /* Catch SIGINT and SIGTERM and, if we get either of them,
2030 clean up and exit. If SIGHUP isn't being ignored, catch
2031 it too and, if we get it, clean up and exit.
2033 We restart any read that was in progress, so that it doesn't
2034 disrupt reading from the sync pipe. The signal handler tells
2035 the capture child to finish; it will report that it finished,
2036 or will exit abnormally, so we'll stop reading from the sync
2037 pipe, pick up the exit status, and quit. */
2038 action.sa_handler = capture_cleanup;
2039 action.sa_flags = SA_RESTART;
2040 sigemptyset(&action.sa_mask);
2041 sigaction(SIGTERM, &action, NULL);
2042 sigaction(SIGINT, &action, NULL);
2043 sigaction(SIGHUP, NULL, &oldaction);
2044 if (oldaction.sa_handler == SIG_DFL)
2045 sigaction(SIGHUP, &action, NULL);
2048 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2049 quiet mode, report the number of packets we've captured.
2051 Again, restart any read that was in progress, so that it doesn't
2052 disrupt reading from the sync pipe. */
2053 action.sa_handler = report_counts_siginfo;
2054 action.sa_flags = SA_RESTART;
2055 sigemptyset(&action.sa_mask);
2056 sigaction(SIGINFO, &action, NULL);
2057 #endif /* SIGINFO */
2060 global_capture_opts.state = CAPTURE_PREPARING;
2062 /* Let the user know which interfaces were chosen. */
2063 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2064 interface_options interface_opts;
2066 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2067 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2068 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2069 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2072 if (global_capture_opts.ifaces->len < 2) {
2074 if (global_capture_opts.ifaces->len < 4) {
2076 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2077 interface_options interface_opts;
2079 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2081 if (global_capture_opts.ifaces->len > 2) {
2082 g_string_append_printf(str, ",");
2084 g_string_append_printf(str, " ");
2085 if (i == global_capture_opts.ifaces->len - 1) {
2086 g_string_append_printf(str, "and ");
2089 g_string_append_printf(str, "%s", interface_opts.descr);
2092 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2094 fprintf(stderr, "Capturing on %s\n", str->str);
2095 g_string_free(str, TRUE);
2097 ret = sync_pipe_start(&global_capture_opts);
2102 /* the actual capture loop
2104 * XXX - glib doesn't seem to provide any event based loop handling.
2106 * XXX - for whatever reason,
2107 * calling g_main_loop_new() ends up in 100% cpu load.
2109 * But that doesn't matter: in UNIX we can use select() to find an input
2110 * source with something to do.
2112 * But that doesn't matter because we're in a CLI (that doesn't need to
2113 * update a GUI or something at the same time) so it's OK if we block
2114 * trying to read from the pipe.
2116 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2117 * wrong (but I leave it there in case I am...).
2120 #ifdef USE_TSHARK_SELECT
2122 FD_SET(pipe_input.source, &readfds);
2125 loop_running = TRUE;
2127 while (loop_running)
2129 #ifdef USE_TSHARK_SELECT
2130 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2136 } else if (ret == 1) {
2138 /* Call the real handler */
2139 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2140 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2143 #ifdef USE_TSHARK_SELECT
2152 /* XXX - move the call to main_window_update() out of capture_sync.c */
2153 /* dummy for capture_sync.c to make linker happy */
2154 void main_window_update(void)
2158 /* capture child detected an error */
2160 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2162 cmdarg_err("%s", error_msg);
2163 cmdarg_err_cont("%s", secondary_error_msg);
2167 /* capture child detected an capture filter related error */
2169 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2171 dfilter_t *rfcode = NULL;
2172 interface_options interface_opts;
2174 g_assert(i < capture_opts->ifaces->len);
2175 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2177 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2179 "Invalid capture filter \"%s\" for interface %s!\n"
2181 "That string looks like a valid display filter; however, it isn't a valid\n"
2182 "capture filter (%s).\n"
2184 "Note that display filters and capture filters don't have the same syntax,\n"
2185 "so you can't use most display filter expressions as capture filters.\n"
2187 "See the User's Guide for a description of the capture filter syntax.",
2188 interface_opts.cfilter, interface_opts.descr, error_message);
2189 dfilter_free(rfcode);
2192 "Invalid capture filter \"%s\" for interface %s!\n"
2194 "That string isn't a valid capture filter (%s).\n"
2195 "See the User's Guide for a description of the capture filter syntax.",
2196 interface_opts.cfilter, interface_opts.descr, error_message);
2201 /* capture child tells us we have a new (or the first) capture file */
2203 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2205 gboolean is_tempfile;
2208 if(capture_opts->state == CAPTURE_PREPARING) {
2209 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2211 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2213 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2215 /* free the old filename */
2216 if (capture_opts->save_file != NULL) {
2218 /* we start a new capture file, close the old one (if we had one before) */
2219 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2220 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2221 wtap_close(((capture_file *) capture_opts->cf)->wth);
2223 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2226 g_free(capture_opts->save_file);
2227 is_tempfile = FALSE;
2229 /* we didn't had a save_file before, must be a tempfile */
2233 /* save the new filename */
2234 capture_opts->save_file = g_strdup(new_file);
2236 /* if we are in real-time mode, open the new file now */
2238 /* Attempt to open the capture file and set up to read from it. */
2239 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2243 /* Don't unlink (delete) the save file - leave it around,
2244 for debugging purposes. */
2245 g_free(capture_opts->save_file);
2246 capture_opts->save_file = NULL;
2251 capture_opts->state = CAPTURE_RUNNING;
2257 /* capture child tells us we have new packets to read */
2259 capture_input_new_packets(capture_options *capture_opts, int to_read)
2265 capture_file *cf = capture_opts->cf;
2266 gboolean filtering_tap_listeners;
2271 * Prevent a SIGINFO handler from writing to the standard error while
2272 * we're doing so or writing to the standard output; instead, have it
2273 * just set a flag telling us to print that information when we're done.
2276 #endif /* SIGINFO */
2278 /* Do we have any tap listeners with filters? */
2279 filtering_tap_listeners = have_filtering_tap_listeners();
2281 /* Get the union of the flags for all tap listeners. */
2282 tap_flags = union_of_tap_listener_flags();
2285 while (to_read-- && cf->wth) {
2286 wtap_cleareof(cf->wth);
2287 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2289 /* read from file failed, tell the capture child to stop */
2290 sync_pipe_stop(capture_opts);
2291 wtap_close(cf->wth);
2294 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2295 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2296 filtering_tap_listeners, tap_flags);
2299 /* packet successfully read and gone through the "Read Filter" */
2305 * Dumpcap's doing all the work; we're not doing any dissection.
2306 * Count all the packets it wrote.
2308 packet_count += to_read;
2311 if (print_packet_counts) {
2312 /* We're printing packet counts. */
2313 if (packet_count != 0) {
2314 fprintf(stderr, "\r%u ", packet_count);
2315 /* stderr could be line buffered */
2322 * Allow SIGINFO handlers to write.
2327 * If a SIGINFO handler asked us to write out capture counts, do so.
2331 #endif /* SIGINFO */
2337 if (!print_packet_counts) {
2338 /* Report the count only if we aren't printing a packet count
2339 as packets arrive. */
2340 fprintf(stderr, "%u packet%s captured\n", packet_count,
2341 plurality(packet_count, "", "s"));
2344 infoprint = FALSE; /* we just reported it */
2345 #endif /* SIGINFO */
2350 report_counts_siginfo(int signum _U_)
2352 int sav_errno = errno;
2353 /* If we've been told to delay printing, just set a flag asking
2354 that we print counts (if we're supposed to), otherwise print
2355 the count of packets captured (if we're supposed to). */
2362 #endif /* SIGINFO */
2365 /* capture child detected any packet drops? */
2367 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2369 if (print_packet_counts) {
2370 /* We're printing packet counts to stderr.
2371 Send a newline so that we move to the line after the packet count. */
2372 fprintf(stderr, "\n");
2376 /* We're printing packet counts to stderr.
2377 Send a newline so that we move to the line after the packet count. */
2378 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2384 * Capture child closed its side of the pipe, report any error and
2385 * do the required cleanup.
2388 capture_input_closed(capture_options *capture_opts, gchar *msg)
2391 fprintf(stderr, "tshark: %s\n", msg);
2395 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2396 wtap_close(((capture_file *) capture_opts->cf)->wth);
2397 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2398 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2401 #ifdef USE_BROKEN_G_MAIN_LOOP
2402 /*g_main_loop_quit(loop);*/
2405 loop_running = FALSE;
2414 capture_cleanup(DWORD ctrltype _U_)
2416 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2417 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2418 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2419 like SIGTERM at least when the machine's shutting down.
2421 For now, we handle them all as indications that we should clean up
2422 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2425 We must return TRUE so that no other handler - such as one that would
2426 terminate the process - gets called.
2428 XXX - for some reason, typing ^C to TShark, if you run this in
2429 a Cygwin console window in at least some versions of Cygwin,
2430 causes TShark to terminate immediately; this routine gets
2431 called, but the main loop doesn't get a chance to run and
2432 exit cleanly, at least if this is compiled with Microsoft Visual
2433 C++ (i.e., it's a property of the Cygwin console window or Bash;
2434 it happens if TShark is not built with Cygwin - for all I know,
2435 building it with Cygwin may make the problem go away). */
2437 /* tell the capture child to stop */
2438 sync_pipe_stop(&global_capture_opts);
2440 /* don't stop our own loop already here, otherwise status messages and
2441 * cleanup wouldn't be done properly. The child will indicate the stop of
2442 * everything by calling capture_input_closed() later */
2448 capture_cleanup(int signum _U_)
2450 /* tell the capture child to stop */
2451 sync_pipe_stop(&global_capture_opts);
2453 /* don't stop our own loop already here, otherwise status messages and
2454 * cleanup wouldn't be done properly. The child will indicate the stop of
2455 * everything by calling capture_input_closed() later */
2458 #endif /* HAVE_LIBPCAP */
2461 process_packet_first_pass(capture_file *cf,
2462 gint64 offset, const struct wtap_pkthdr *whdr,
2463 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2470 /* The frame number of this packet is one more than the count of
2471 frames in this packet. */
2472 framenum = cf->count + 1;
2474 /* If we're not running a display filter and we're not printing any
2475 packet information, we don't need to do a dissection. This means
2476 that all packets can be marked as 'passed'. */
2479 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2481 /* If we're going to print packet information, or we're going to
2482 run a read filter, or we're going to process taps, set up to
2483 do a dissection and do so. */
2484 if (do_dissection) {
2485 if (gbl_resolv_flags)
2486 /* Grab any resolved addresses */
2487 host_name_lookup_process(NULL);
2489 /* The protocol tree will be "visible", i.e., printed, only if we're
2490 printing packet details, which is true if we're printing stuff
2491 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2493 epan_dissect_init(&edt, FALSE, FALSE);
2495 /* If we're running a read filter, prime the epan_dissect_t with that
2498 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2500 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2501 &first_ts, &prev_dis_ts, &prev_cap_ts);
2503 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2505 /* Run the read filter if we have one. */
2507 passed = dfilter_apply_edt(cf->rfcode, &edt);
2511 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2512 frame_data_sequence_add(cf->frames, &fdlocal);
2517 epan_dissect_cleanup(&edt);
2523 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2524 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2525 gboolean filtering_tap_listeners, guint tap_flags)
2527 gboolean create_proto_tree;
2532 /* If we're not running a display filter and we're not printing any
2533 packet information, we don't need to do a dissection. This means
2534 that all packets can be marked as 'passed'. */
2537 /* If we're going to print packet information, or we're going to
2538 run a read filter, or we're going to process taps, set up to
2539 do a dissection and do so. */
2540 if (do_dissection) {
2541 if (gbl_resolv_flags)
2542 /* Grab any resolved addresses */
2543 host_name_lookup_process(NULL);
2545 if (cf->rfcode || verbose || filtering_tap_listeners ||
2546 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2547 create_proto_tree = TRUE;
2549 create_proto_tree = FALSE;
2551 /* The protocol tree will be "visible", i.e., printed, only if we're
2552 printing packet details, which is true if we're printing stuff
2553 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2555 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2557 /* If we're running a read filter, prime the epan_dissect_t with that
2560 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2562 col_custom_prime_edt(&edt, &cf->cinfo);
2564 tap_queue_init(&edt);
2566 /* We only need the columns if either
2568 1) some tap needs the columns
2572 2) we're printing packet info but we're *not* verbose; in verbose
2573 mode, we print the protocol tree, not the protocol summary. */
2574 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2579 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2581 tap_push_tapped_queue(&edt);
2583 /* Run the read filter if we have one. */
2585 passed = dfilter_apply_edt(cf->rfcode, &edt);
2589 /* Process this packet. */
2590 if (print_packet_info) {
2591 /* We're printing packet information; print the information for
2594 print_packet(cf, &edt);
2596 print_packet(cf, NULL);
2598 /* The ANSI C standard does not appear to *require* that a line-buffered
2599 stream be flushed to the host environment whenever a newline is
2600 written, it just says that, on such a stream, characters "are
2601 intended to be transmitted to or from the host environment as a
2602 block when a new-line character is encountered".
2604 The Visual C++ 6.0 C implementation doesn't do what is intended;
2605 even if you set a stream to be line-buffered, it still doesn't
2606 flush the buffer at the end of every line.
2608 So, if the "-l" flag was specified, we flush the standard output
2609 at the end of a packet. This will do the right thing if we're
2610 printing packet summary lines, and, as we print the entire protocol
2611 tree for a single packet without waiting for anything to happen,
2612 it should be as good as line-buffered mode if we're printing
2613 protocol trees. (The whole reason for the "-l" flag in either
2614 tcpdump or TShark is to allow the output of a live capture to
2615 be piped to a program or script and to have that script see the
2616 information for the packet as soon as it's printed, rather than
2617 having to wait until a standard I/O buffer fills up. */
2621 if (ferror(stdout)) {
2622 show_print_file_io_error(errno);
2628 if (do_dissection) {
2629 epan_dissect_cleanup(&edt);
2635 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2636 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2639 int snapshot_length;
2642 gchar *err_info = NULL;
2644 char *save_file_string = NULL;
2645 gboolean filtering_tap_listeners;
2648 #ifdef PCAP_NG_DEFAULT
2649 linktype = WTAP_ENCAP_PER_PACKET;
2651 linktype = wtap_file_encap(cf->wth);
2653 if (save_file != NULL) {
2654 /* Get a string that describes what we're writing to */
2655 save_file_string = output_file_description(save_file);
2657 /* Set up to write to the capture file. */
2658 snapshot_length = wtap_snapshot_length(cf->wth);
2659 if (snapshot_length == 0) {
2660 /* Snapshot length of input file not known. */
2661 snapshot_length = WTAP_MAX_PACKET_SIZE;
2663 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2664 FALSE /* compressed */, &err);
2667 /* We couldn't set up to write to the capture file. */
2670 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2671 cmdarg_err("Capture files can't be written in that format.");
2674 case WTAP_ERR_UNSUPPORTED_ENCAP:
2675 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2676 cmdarg_err("The capture file being read can't be written in "
2677 "the format \"%s\".", wtap_encap_short_string(linktype));
2680 case WTAP_ERR_CANT_OPEN:
2681 cmdarg_err("The %s couldn't be created for some "
2682 "unknown reason.", save_file_string);
2685 case WTAP_ERR_SHORT_WRITE:
2686 cmdarg_err("A full header couldn't be written to the %s.",
2691 cmdarg_err("The %s could not be created: %s.", save_file_string,
2692 wtap_strerror(err));
2698 if (print_packet_info) {
2699 if (!write_preamble(cf)) {
2701 show_print_file_io_error(err);
2708 if (pdh && out_file_name_res) {
2709 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2710 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2711 wtap_file_type_short_string(out_file_type));
2715 /* Do we have any tap listeners with filters? */
2716 filtering_tap_listeners = have_filtering_tap_listeners();
2718 /* Get the union of the flags for all tap listeners. */
2719 tap_flags = union_of_tap_listener_flags();
2721 if (perform_two_pass_analysis) {
2724 int old_max_packet_count = max_packet_count;
2726 /* Allocate a frame_data_sequence for all the frames. */
2727 cf->frames = new_frame_data_sequence();
2729 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2730 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2731 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2732 /* Stop reading if we have the maximum number of packets;
2733 * When the -c option has not been used, max_packet_count
2734 * starts at 0, which practically means, never stop reading.
2735 * (unless we roll over max_packet_count ?)
2737 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2738 err = 0; /* This is not an error */
2744 /* Close the sequential I/O side, to free up memory it requires. */
2745 wtap_sequential_close(cf->wth);
2747 /* Allow the protocol dissectors to free up memory that they
2748 * don't need after the sequential run-through of the packets. */
2749 postseq_cleanup_all_protocols();
2751 max_packet_count = old_max_packet_count;
2753 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2754 fdata = frame_data_sequence_find(cf->frames, framenum);
2755 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2756 cf->pd, fdata->cap_len, &err, &err_info)) {
2757 if (process_packet_second_pass(cf, fdata,
2758 &cf->pseudo_header, cf->pd,
2759 filtering_tap_listeners, tap_flags)) {
2760 /* Either there's no read filtering or this packet passed the
2761 filter, so, if we're writing to a capture file, write
2764 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2765 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2767 /* Error writing to a capture file */
2768 show_capture_file_io_error(save_file, err, FALSE);
2769 wtap_dump_close(pdh, &err);
2773 /* Stop reading if we have the maximum number of packets;
2774 * When the -c option has not been used, max_packet_count
2775 * starts at 0, which practically means, never stop reading.
2776 * (unless we roll over max_packet_count ?)
2778 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2779 err = 0; /* This is not an error */
2787 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2788 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2789 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2790 filtering_tap_listeners, tap_flags)) {
2791 /* Either there's no read filtering or this packet passed the
2792 filter, so, if we're writing to a capture file, write
2795 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2796 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2798 /* Error writing to a capture file */
2799 show_capture_file_io_error(save_file, err, FALSE);
2800 wtap_dump_close(pdh, &err);
2804 /* Stop reading if we have the maximum number of packets;
2805 * When the -c option has not been used, max_packet_count
2806 * starts at 0, which practically means, never stop reading.
2807 * (unless we roll over max_packet_count ?)
2809 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2810 err = 0; /* This is not an error */
2819 * Print a message noting that the read failed somewhere along the line.
2821 * If we're printing packet data, and the standard output and error are
2822 * going to the same place, flush the standard output, so everything
2823 * buffered up is written, and then print a newline to the standard error
2824 * before printing the error message, to separate it from the packet
2825 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2826 * the _fstat() documentation at Microsoft doesn't indicate whether
2827 * st_ino is even supported.)
2830 if (print_packet_info) {
2831 struct stat stat_stdout, stat_stderr;
2833 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2834 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2835 stat_stdout.st_ino == stat_stderr.st_ino) {
2837 fprintf(stderr, "\n");
2844 case WTAP_ERR_UNSUPPORTED_ENCAP:
2845 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2846 cf->filename, err_info);
2850 case WTAP_ERR_CANT_READ:
2851 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2855 case WTAP_ERR_SHORT_READ:
2856 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2860 case WTAP_ERR_BAD_RECORD:
2861 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2862 cf->filename, err_info);
2866 case WTAP_ERR_DECOMPRESS:
2867 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2868 "(%s)", cf->filename, err_info);
2872 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2873 cf->filename, wtap_strerror(err));
2876 if (save_file != NULL) {
2877 /* Now close the capture file. */
2878 if (!wtap_dump_close(pdh, &err))
2879 show_capture_file_io_error(save_file, err, TRUE);
2882 if (save_file != NULL) {
2883 /* Now close the capture file. */
2884 if (!wtap_dump_close(pdh, &err))
2885 show_capture_file_io_error(save_file, err, TRUE);
2887 if (print_packet_info) {
2888 if (!write_finale()) {
2890 show_print_file_io_error(err);
2897 wtap_close(cf->wth);
2900 g_free(save_file_string);
2906 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2907 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2908 gboolean filtering_tap_listeners, guint tap_flags)
2911 gboolean create_proto_tree;
2916 /* Count this packet. */
2919 /* If we're not running a display filter and we're not printing any
2920 packet information, we don't need to do a dissection. This means
2921 that all packets can be marked as 'passed'. */
2924 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2926 /* If we're going to print packet information, or we're going to
2927 run a read filter, or we're going to process taps, set up to
2928 do a dissection and do so. */
2929 if (do_dissection) {
2930 if (print_packet_info && gbl_resolv_flags)
2931 /* Grab any resolved addresses */
2932 host_name_lookup_process(NULL);
2934 if (cf->rfcode || verbose || filtering_tap_listeners ||
2935 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2936 create_proto_tree = TRUE;
2938 create_proto_tree = FALSE;
2940 /* The protocol tree will be "visible", i.e., printed, only if we're
2941 printing packet details, which is true if we're printing stuff
2942 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2944 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2946 /* If we're running a read filter, prime the epan_dissect_t with that
2949 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2951 col_custom_prime_edt(&edt, &cf->cinfo);
2953 tap_queue_init(&edt);
2955 /* We only need the columns if either
2957 1) some tap needs the columns
2961 2) we're printing packet info but we're *not* verbose; in verbose
2962 mode, we print the protocol tree, not the protocol summary. */
2963 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2968 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2969 &first_ts, &prev_dis_ts, &prev_cap_ts);
2971 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2973 tap_push_tapped_queue(&edt);
2975 /* Run the read filter if we have one. */
2977 passed = dfilter_apply_edt(cf->rfcode, &edt);
2981 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2983 /* Process this packet. */
2984 if (print_packet_info) {
2985 /* We're printing packet information; print the information for
2988 print_packet(cf, &edt);
2990 print_packet(cf, NULL);
2992 /* The ANSI C standard does not appear to *require* that a line-buffered
2993 stream be flushed to the host environment whenever a newline is
2994 written, it just says that, on such a stream, characters "are
2995 intended to be transmitted to or from the host environment as a
2996 block when a new-line character is encountered".
2998 The Visual C++ 6.0 C implementation doesn't do what is intended;
2999 even if you set a stream to be line-buffered, it still doesn't
3000 flush the buffer at the end of every line.
3002 So, if the "-l" flag was specified, we flush the standard output
3003 at the end of a packet. This will do the right thing if we're
3004 printing packet summary lines, and, as we print the entire protocol
3005 tree for a single packet without waiting for anything to happen,
3006 it should be as good as line-buffered mode if we're printing
3007 protocol trees. (The whole reason for the "-l" flag in either
3008 tcpdump or TShark is to allow the output of a live capture to
3009 be piped to a program or script and to have that script see the
3010 information for the packet as soon as it's printed, rather than
3011 having to wait until a standard I/O buffer fills up. */
3015 if (ferror(stdout)) {
3016 show_print_file_io_error(errno);
3022 if (do_dissection) {
3023 epan_dissect_cleanup(&edt);
3024 frame_data_cleanup(&fdata);
3030 write_preamble(capture_file *cf)
3032 switch (output_action) {
3035 return print_preamble(print_stream, cf ? cf->filename : NULL);
3039 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3041 write_psml_preamble(stdout);
3042 return !ferror(stdout);
3045 write_fields_preamble(output_fields, stdout);
3046 return !ferror(stdout);
3049 g_assert_not_reached();
3055 get_line_buf(size_t len)
3057 static char *line_bufp = NULL;
3058 static size_t line_buf_len = 256;
3059 size_t new_line_buf_len;
3061 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3062 new_line_buf_len *= 2)
3064 if (line_bufp == NULL) {
3065 line_buf_len = new_line_buf_len;
3066 line_bufp = g_malloc(line_buf_len + 1);
3068 if (new_line_buf_len > line_buf_len) {
3069 line_buf_len = new_line_buf_len;
3070 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3077 print_columns(capture_file *cf)
3084 line_bufp = get_line_buf(256);
3087 for (i = 0; i < cf->cinfo.num_cols; i++) {
3088 /* Skip columns not marked as visible. */
3089 if (!get_column_visible(i))
3091 switch (cf->cinfo.col_fmt[i]) {
3095 * Don't print this if we're doing a live capture from a network
3096 * interface - if we're doing a live capture, you won't be
3097 * able to look at the capture in the future (it's not being
3098 * saved anywhere), so the frame numbers are unlikely to be
3101 * (XXX - it might be nice to be able to save and print at
3102 * the same time, sort of like an "Update list of packets
3103 * in real time" capture in Wireshark.)
3105 if (global_capture_opts.ifaces->len > 0)
3108 column_len = strlen(cf->cinfo.col_data[i]);
3111 line_bufp = get_line_buf(buf_offset + column_len);
3112 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3118 case COL_ABS_DATE_TIME:
3120 case COL_UTC_DATE_TIME: /* XXX - wider */
3121 column_len = strlen(cf->cinfo.col_data[i]);
3122 if (column_len < 10)
3124 line_bufp = get_line_buf(buf_offset + column_len);
3125 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3131 case COL_DEF_DL_SRC:
3132 case COL_RES_DL_SRC:
3133 case COL_UNRES_DL_SRC:
3134 case COL_DEF_NET_SRC:
3135 case COL_RES_NET_SRC:
3136 case COL_UNRES_NET_SRC:
3137 column_len = strlen(cf->cinfo.col_data[i]);
3138 if (column_len < 12)
3140 line_bufp = get_line_buf(buf_offset + column_len);
3141 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3147 case COL_DEF_DL_DST:
3148 case COL_RES_DL_DST:
3149 case COL_UNRES_DL_DST:
3150 case COL_DEF_NET_DST:
3151 case COL_RES_NET_DST:
3152 case COL_UNRES_NET_DST:
3153 column_len = strlen(cf->cinfo.col_data[i]);
3154 if (column_len < 12)
3156 line_bufp = get_line_buf(buf_offset + column_len);
3157 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3161 column_len = strlen(cf->cinfo.col_data[i]);
3162 line_bufp = get_line_buf(buf_offset + column_len);
3163 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3166 buf_offset += column_len;
3167 if (i != cf->cinfo.num_cols - 1) {
3169 * This isn't the last column, so we need to print a
3170 * separator between this column and the next.
3172 * If we printed a network source and are printing a
3173 * network destination of the same type next, separate
3174 * them with " -> "; if we printed a network destination
3175 * and are printing a network source of the same type
3176 * next, separate them with " <- "; otherwise separate them
3179 * We add enough space to the buffer for " <- " or " -> ",
3180 * even if we're only adding " ".
3182 line_bufp = get_line_buf(buf_offset + 4);
3183 switch (cf->cinfo.col_fmt[i]) {
3188 switch (cf->cinfo.col_fmt[i + 1]) {
3193 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3198 g_strlcat(line_bufp + buf_offset, " ", 5);
3204 case COL_DEF_DL_SRC:
3205 case COL_RES_DL_SRC:
3206 case COL_UNRES_DL_SRC:
3207 switch (cf->cinfo.col_fmt[i + 1]) {
3209 case COL_DEF_DL_DST:
3210 case COL_RES_DL_DST:
3211 case COL_UNRES_DL_DST:
3212 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3217 g_strlcat(line_bufp + buf_offset, " ", 5);
3223 case COL_DEF_NET_SRC:
3224 case COL_RES_NET_SRC:
3225 case COL_UNRES_NET_SRC:
3226 switch (cf->cinfo.col_fmt[i + 1]) {
3228 case COL_DEF_NET_DST:
3229 case COL_RES_NET_DST:
3230 case COL_UNRES_NET_DST:
3231 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3236 g_strlcat(line_bufp + buf_offset, " ", 5);
3245 switch (cf->cinfo.col_fmt[i + 1]) {
3250 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3255 g_strlcat(line_bufp + buf_offset, " ", 5);
3261 case COL_DEF_DL_DST:
3262 case COL_RES_DL_DST:
3263 case COL_UNRES_DL_DST:
3264 switch (cf->cinfo.col_fmt[i + 1]) {
3266 case COL_DEF_DL_SRC:
3267 case COL_RES_DL_SRC:
3268 case COL_UNRES_DL_SRC:
3269 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3274 g_strlcat(line_bufp + buf_offset, " ", 5);
3280 case COL_DEF_NET_DST:
3281 case COL_RES_NET_DST:
3282 case COL_UNRES_NET_DST:
3283 switch (cf->cinfo.col_fmt[i + 1]) {
3285 case COL_DEF_NET_SRC:
3286 case COL_RES_NET_SRC:
3287 case COL_UNRES_NET_SRC:
3288 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3293 g_strlcat(line_bufp + buf_offset, " ", 5);
3300 g_strlcat(line_bufp + buf_offset, " ", 5);
3306 return print_line(print_stream, 0, line_bufp);
3310 print_packet(capture_file *cf, epan_dissect_t *edt)
3312 print_args_t print_args;
3315 /* Print the information in the protocol tree. */
3316 switch (output_action) {
3319 print_args.to_file = TRUE;
3320 print_args.format = print_format;
3321 print_args.print_summary = !verbose;
3322 print_args.print_hex = verbose && print_hex;
3323 print_args.print_formfeed = FALSE;
3324 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3326 /* init the packet range */
3327 packet_range_init(&print_args.range);
3329 if (!proto_tree_print(&print_args, edt, print_stream))
3332 /* "print_hex_data()" will put out a leading blank line, as well
3333 as a trailing one; print one here, to separate the packets,
3334 only if "print_hex_data()" won't be called. */
3335 if (!print_line(print_stream, 0, separator))
3341 proto_tree_write_pdml(edt, stdout);
3343 return !ferror(stdout);
3345 proto_tree_write_fields(output_fields, edt, stdout);
3347 return !ferror(stdout);
3350 /* Just fill in the columns. */
3351 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3353 /* Now print them. */
3354 switch (output_action) {
3357 if (!print_columns(cf))
3362 proto_tree_write_psml(edt, stdout);
3363 return !ferror(stdout);
3364 case WRITE_FIELDS: /*No non-verbose "fields" format */
3365 g_assert_not_reached();
3370 if (!print_hex_data(print_stream, edt))
3372 if (!print_line(print_stream, 0, ""))
3381 switch (output_action) {
3384 return print_finale(print_stream);
3388 write_pdml_finale(stdout);
3390 write_psml_finale(stdout);
3391 return !ferror(stdout);
3394 write_fields_finale(output_fields, stdout);
3395 return !ferror(stdout);
3398 g_assert_not_reached();
3404 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3408 char err_msg[2048+1];
3410 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3414 /* The open succeeded. Fill in the information for this file. */
3416 /* Cleanup all data structures used for dissection. */
3417 cleanup_dissection();
3418 /* Initialize all data structures used for dissection. */
3422 cf->f_datalen = 0; /* not used, but set it anyway */
3424 /* Set the file name because we need it to set the follow stream filter.
3425 XXX - is that still true? We need it for other reasons, though,
3427 cf->filename = g_strdup(fname);
3429 /* Indicate whether it's a permanent or temporary file. */
3430 cf->is_tempfile = is_tempfile;
3432 /* If it's a temporary capture buffer file, mark it as not saved. */
3433 cf->user_saved = !is_tempfile;
3435 cf->cd_t = wtap_file_type(cf->wth);
3437 cf->drops_known = FALSE;
3439 cf->snap = wtap_snapshot_length(cf->wth);
3440 if (cf->snap == 0) {
3441 /* Snapshot length not known. */
3442 cf->has_snap = FALSE;
3443 cf->snap = WTAP_MAX_PACKET_SIZE;
3445 cf->has_snap = TRUE;
3446 nstime_set_zero(&cf->elapsed_time);
3447 nstime_set_unset(&first_ts);
3448 nstime_set_unset(&prev_dis_ts);
3449 nstime_set_unset(&prev_cap_ts);
3451 cf->state = FILE_READ_IN_PROGRESS;
3453 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3454 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3459 g_snprintf(err_msg, sizeof err_msg,
3460 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3461 cmdarg_err("%s", err_msg);
3466 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3468 char *save_file_string;
3470 save_file_string = output_file_description(fname);
3475 cmdarg_err("Not all the packets could be written to the %s because there is "
3476 "no space left on the file system.",
3482 cmdarg_err("Not all the packets could be written to the %s because you are "
3483 "too close to, or over your disk quota.",
3488 case WTAP_ERR_CANT_CLOSE:
3489 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3493 case WTAP_ERR_SHORT_WRITE:
3494 cmdarg_err("Not all the packets could be written to the %s.",
3500 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3501 wtap_strerror(err));
3503 cmdarg_err("An error occurred while writing to the %s: %s.",
3504 save_file_string, wtap_strerror(err));
3508 g_free(save_file_string);
3512 show_print_file_io_error(int err)
3517 cmdarg_err("Not all the packets could be printed because there is "
3518 "no space left on the file system.");
3523 cmdarg_err("Not all the packets could be printed because you are "
3524 "too close to, or over your disk quota.");
3529 cmdarg_err("An error occurred while printing packets: %s.",
3536 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3540 static char errmsg_errno[1024+1];
3543 /* Wiretap error. */
3546 case WTAP_ERR_NOT_REGULAR_FILE:
3547 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3550 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3551 /* Seen only when opening a capture file for reading. */
3552 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3555 case WTAP_ERR_UNSUPPORTED:
3556 /* Seen only when opening a capture file for reading. */
3557 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3558 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3561 errmsg = errmsg_errno;
3564 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3565 /* Seen only when opening a capture file for writing. */
3566 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3567 "The file \"%%s\" is a pipe, and %s capture files can't be "
3568 "written to a pipe.", wtap_file_type_string(file_type));
3569 errmsg = errmsg_errno;
3572 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3573 /* Seen only when opening a capture file for writing. */
3574 errmsg = "TShark doesn't support writing capture files in that format.";
3577 case WTAP_ERR_UNSUPPORTED_ENCAP:
3579 errmsg = "TShark can't save this capture in that format.";
3581 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3582 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3585 errmsg = errmsg_errno;
3589 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3591 errmsg = "TShark can't save this capture in that format.";
3593 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3596 case WTAP_ERR_BAD_RECORD:
3597 /* Seen only when opening a capture file for reading. */
3598 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3599 "The file \"%%s\" appears to be damaged or corrupt.\n"
3602 errmsg = errmsg_errno;
3605 case WTAP_ERR_CANT_OPEN:
3607 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3609 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3612 case WTAP_ERR_SHORT_READ:
3613 errmsg = "The file \"%s\" appears to have been cut short"
3614 " in the middle of a packet or other data.";
3617 case WTAP_ERR_SHORT_WRITE:
3618 errmsg = "A full header couldn't be written to the file \"%s\".";
3621 case WTAP_ERR_DECOMPRESS:
3622 /* Seen only when opening a capture file for reading. */
3623 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3624 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3627 errmsg = errmsg_errno;
3631 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3632 "The file \"%%s\" could not be %s: %s.",
3633 for_writing ? "created" : "opened",
3634 wtap_strerror(err));
3635 errmsg = errmsg_errno;
3639 errmsg = file_open_error_message(err, for_writing);
3644 * Open/create errors are reported with an console message in TShark.
3647 open_failure_message(const char *filename, int err, gboolean for_writing)
3649 fprintf(stderr, "tshark: ");
3650 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3651 fprintf(stderr, "\n");
3656 * General errors are reported with an console message in TShark.
3659 failure_message(const char *msg_format, va_list ap)
3661 fprintf(stderr, "tshark: ");
3662 vfprintf(stderr, msg_format, ap);
3663 fprintf(stderr, "\n");
3667 * Read errors are reported with an console message in TShark.
3670 read_failure_message(const char *filename, int err)
3672 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3673 filename, g_strerror(err));
3677 * Write errors are reported with an console message in TShark.
3680 write_failure_message(const char *filename, int err)
3682 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3683 filename, g_strerror(err));
3687 * Print to the standard error. This is a command-line tool, so there's
3688 * no need to pop up a console.
3691 vfprintf_stderr(const char *fmt, va_list ap)
3693 vfprintf(stderr, fmt, ap);
3697 fprintf_stderr(const char *fmt, ...)
3702 vfprintf_stderr(fmt, ap);
3707 * Report an error in command-line arguments.
3710 cmdarg_err(const char *fmt, ...)
3715 failure_message(fmt, ap);
3720 * Report additional information for an error in command-line arguments.
3723 cmdarg_err_cont(const char *fmt, ...)
3728 vfprintf(stderr, fmt, ap);
3729 fprintf(stderr, "\n");