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>
57 #include "wsutil/wsgetopt.h"
61 #include <epan/epan.h>
62 #include <epan/filesystem.h>
63 #include <wsutil/privileges.h>
64 #include <wsutil/file_util.h>
67 #include <epan/timestamp.h>
68 #include <epan/packet.h>
70 #include "disabled_protos.h"
71 #include <epan/prefs.h>
72 #include <epan/column.h>
74 #include <epan/addr_resolv.h>
76 #include "clopts_common.h"
77 #include "console_io.h"
78 #include "cmdarg_err.h"
79 #include "version_info.h"
80 #include <epan/plugins.h>
82 #include <epan/epan_dissect.h>
84 #include <epan/stat_cmd_args.h>
85 #include <epan/timestamp.h>
86 #include <epan/ex-opt.h>
89 #include "capture_ui_utils.h"
90 #include "capture_ifinfo.h"
91 #include "capture-pcap-util.h"
93 #include "capture-wpcap.h"
94 #include "capture_errs.h"
95 #include <wsutil/unicode-utils.h>
97 #include "capture_sync.h"
98 #endif /* HAVE_LIBPCAP */
100 #include <epan/funnel.h>
103 * This is the template for the decode as option; it is shared between the
104 * various functions that output the usage for this parameter.
106 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
108 static guint32 cum_bytes;
109 static nstime_t first_ts;
110 static nstime_t prev_dis_ts;
111 static nstime_t prev_cap_ts;
113 static gboolean print_packet_info; /* TRUE if we're to print packet information */
115 static gboolean perform_two_pass_analysis;
118 * The way the packet decode is to be written.
121 WRITE_TEXT, /* summary or detail text */
122 WRITE_XML, /* PDML or PSML */
123 WRITE_FIELDS /* User defined list of fields */
124 /* Add CSV and the like here */
127 static output_action_e output_action;
128 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
129 static gboolean verbose;
130 static gboolean print_hex;
131 static gboolean line_buffered;
133 static print_format_e print_format = PR_FMT_TEXT;
134 static print_stream_t *print_stream;
136 static output_fields_t* output_fields = NULL;
140 * TRUE if we're to print packet counts to keep track of captured packets.
142 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, " -R <read filter> packet filter in Wireshark display filter syntax\n");
281 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
282 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
283 fprintf(output, " -d %s ...\n", decode_as_arg_template);
284 fprintf(output, " \"Decode As\", see the man page for details\n");
285 fprintf(output, " Example: tcp.port==8888,http\n");
287 /*fprintf(output, "\n");*/
288 fprintf(output, "Output:\n");
289 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
290 fprintf(output, " (or to the standard output for \"-\")\n");
291 fprintf(output, " -C <config profile> start with specified configuration profile\n");
292 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
293 fprintf(output, " an empty \"-F\" option will list the file types\n");
294 fprintf(output, " -V add output of packet tree (Packet Details)\n");
295 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
296 fprintf(output, " separated\n");
297 fprintf(output, " -S display packets even when writing to a file\n");
298 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
299 fprintf(output, " -T pdml|ps|psml|text|fields\n");
300 fprintf(output, " format of text output (def: text)\n");
301 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
302 fprintf(output, " this option can be repeated to print multiple fields\n");
303 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
304 fprintf(output, " header=y|n switch headers on and off\n");
305 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
306 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
307 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
308 fprintf(output, " aggregator\n");
309 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
310 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
311 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
312 fprintf(output, " -l flush standard output after each packet\n");
313 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
314 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
315 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
317 fprintf(output, "\n");
318 fprintf(output, "Miscellaneous:\n");
319 fprintf(output, " -h display this help and exit\n");
320 fprintf(output, " -v display version info and exit\n");
321 fprintf(output, " -o <name>:<value> ... override preference setting\n");
322 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
323 fprintf(output, " -G [report] dump one of several available reports and exit\n");
324 fprintf(output, " default report=\"fields\"\n");
325 fprintf(output, " use \"-G ?\" for more help\n");
329 glossary_option_help(void)
335 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
337 fprintf(output, "\n");
338 fprintf(output, "Usage: tshark -G [report]\n");
339 fprintf(output, "\n");
340 fprintf(output, "Glossary table reports:\n");
341 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
342 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
343 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
344 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
345 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
346 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
347 fprintf(output, "\n");
348 fprintf(output, "Preference reports:\n");
349 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
350 fprintf(output, " -G currentprefs dump current preferences and exit\n");
351 fprintf(output, "\n");
356 * For a dissector table, print on the stream described by output,
357 * its short name (which is what's used in the "-d" option) and its
361 display_dissector_table_names(const char *table_name, const char *ui_name,
364 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
368 * For a dissector handle, print on the stream described by output,
369 * the filter name (which is what's used in the "-d" option) and the full
370 * name for the protocol that corresponds to this handle.
373 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
376 const gchar* proto_filter_name;
377 const gchar* proto_ui_name;
379 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
381 if (proto_id != -1) {
382 proto_filter_name = proto_get_protocol_filter_name(proto_id);
383 proto_ui_name = proto_get_protocol_name(proto_id);
384 g_assert(proto_filter_name != NULL);
385 g_assert(proto_ui_name != NULL);
387 fprintf((FILE *)output, "\t%s (%s)\n",
394 * The protocol_name_search structure is used by find_protocol_name_func()
395 * to pass parameters and store results
397 struct protocol_name_search{
398 gchar *searched_name; /* Protocol filter name we are looking for */
399 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
400 guint nb_match; /* How many dissectors matched searched_name */
402 typedef struct protocol_name_search *protocol_name_search_t;
405 * This function parses all dissectors associated with a table to find the
406 * one whose protocol has the specified filter name. It is called
407 * as a reference function in a call to dissector_table_foreach_handle.
408 * The name we are looking for, as well as the results, are stored in the
409 * protocol_name_search struct pointed to by user_data.
410 * If called using dissector_table_foreach_handle, we actually parse the
411 * whole list of dissectors.
414 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
418 const gchar *protocol_filter_name;
419 protocol_name_search_t search_info;
423 search_info = (protocol_name_search_t)user_data;
425 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
426 if (proto_id != -1) {
427 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
428 g_assert(protocol_filter_name != NULL);
429 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
431 if (search_info->nb_match == 0) {
432 /* Record this handle only if this is the first match */
433 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
435 search_info->nb_match++;
441 * Print all layer type names supported.
442 * We send the output to the stream described by the handle output.
446 fprint_all_layer_types(FILE *output)
449 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
453 * Print all protocol names supported for a specific layer type.
454 * table_name contains the layer type name in which the search is performed.
455 * We send the output to the stream described by the handle output.
459 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
462 dissector_table_foreach_handle(table_name,
463 display_dissector_names,
468 * The function below parses the command-line parameters for the decode as
469 * feature (a string pointer by cl_param).
470 * It checks the format of the command-line, searches for a matching table
471 * and dissector. If a table/dissector match is not found, we display a
472 * summary of the available tables/dissectors (on stderr) and return FALSE.
473 * If everything is fine, we get the "Decode as" preference activated,
474 * then we return TRUE.
477 add_decode_as(const gchar *cl_param)
481 gchar *decoded_param;
482 gchar *remaining_param;
484 gchar *dissector_str;
485 dissector_handle_t dissector_matching;
486 dissector_table_t table_matching;
487 ftenum_t dissector_table_selector_type;
488 struct protocol_name_search user_protocol_name;
490 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
493 decoded_param = g_strdup(cl_param);
494 g_assert(decoded_param);
497 /* The lines below will parse this string (modifying it) to extract all
498 necessary information. Note that decoded_param is still needed since
499 strings are not copied - we just save pointers. */
501 /* This section extracts a layer type (table_name) from decoded_param */
502 table_name = decoded_param; /* Layer type string starts from beginning */
504 remaining_param = strchr(table_name, '=');
505 if (remaining_param == NULL) {
506 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
507 /* If the argument does not follow the template, carry on anyway to check
508 if the table name is at least correct. If remaining_param is NULL,
509 we'll exit anyway further down */
512 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
515 /* Remove leading and trailing spaces from the table name */
516 while ( table_name[0] == ' ' )
518 while ( table_name[strlen(table_name) - 1] == ' ' )
519 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
521 /* The following part searches a table matching with the layer type specified */
522 table_matching = NULL;
524 /* Look for the requested table */
525 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
526 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
529 table_matching = find_dissector_table(table_name);
530 if (!table_matching) {
531 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
535 if (!table_matching) {
536 /* Display a list of supported layer types to help the user, if the
537 specified layer type was not found */
538 cmdarg_err("Valid layer types are:");
539 fprint_all_layer_types(stderr);
541 if (remaining_param == NULL || !table_matching) {
542 /* Exit if the layer type was not found, or if no '=' separator was found
544 g_free(decoded_param);
548 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
549 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
552 remaining_param++; /* Move to the second '=' */
553 *remaining_param = '\0'; /* Remove the second '=' */
555 remaining_param++; /* Position after the layer type string */
557 /* This section extracts a selector value (selector_str) from decoded_param */
559 selector_str = remaining_param; /* Next part starts with the selector number */
561 remaining_param = strchr(selector_str, ',');
562 if (remaining_param == NULL) {
563 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
564 /* If the argument does not follow the template, carry on anyway to check
565 if the selector value is at least correct. If remaining_param is NULL,
566 we'll exit anyway further down */
569 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
572 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
574 switch (dissector_table_selector_type) {
580 /* The selector for this table is an unsigned number. Parse it as such.
581 There's no need to remove leading and trailing spaces from the
582 selector number string, because sscanf will do that for us. */
583 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
584 cmdarg_err("Invalid selector number \"%s\"", selector_str);
585 g_free(decoded_param);
592 /* The selector for this table is a string. */
596 /* There are currently no dissector tables with any types other
597 than the ones listed above. */
598 g_assert_not_reached();
601 if (remaining_param == NULL) {
602 /* Exit if no ',' separator was found (see above) */
603 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
604 fprint_all_protocols_for_layer_types(stderr, table_name);
605 g_free(decoded_param);
609 remaining_param++; /* Position after the selector number string */
611 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
613 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
615 /* Remove leading and trailing spaces from the dissector name */
616 while ( dissector_str[0] == ' ' )
618 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
619 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
621 dissector_matching = NULL;
623 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
624 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 */
625 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
628 user_protocol_name.nb_match = 0;
629 user_protocol_name.searched_name = dissector_str;
630 user_protocol_name.matched_handle = NULL;
632 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 */
634 if (user_protocol_name.nb_match != 0) {
635 dissector_matching = user_protocol_name.matched_handle;
636 if (user_protocol_name.nb_match > 1) {
637 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
641 /* OK, check whether the problem is that there isn't any such
642 protocol, or that there is but it's not specified as a protocol
643 that's valid for that dissector table.
644 Note, we don't exit here, but dissector_matching will remain NULL,
646 if (proto_get_id_by_filter_name(dissector_str) == -1) {
647 /* No such protocol */
648 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
650 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
651 dissector_str, table_name);
656 if (!dissector_matching) {
657 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
658 fprint_all_protocols_for_layer_types(stderr, table_name);
659 g_free(decoded_param);
663 /* This is the end of the code that parses the command-line options.
664 All information is now stored in the variables:
668 The above variables that are strings are still pointing to areas within
669 decoded_parm. decoded_parm thus still needs to be kept allocated in
670 until we stop needing these variables
671 decoded_param will be deallocated at each exit point of this function */
674 /* We now have a pointer to the handle for the requested dissector
675 (requested protocol) inside the variable dissector_matching */
676 switch (dissector_table_selector_type) {
682 /* The selector for this table is an unsigned number. */
683 dissector_change_uint(table_name, selector, dissector_matching);
688 /* The selector for this table is a string. */
689 dissector_change_string(table_name, selector_str, dissector_matching);
693 /* There are currently no dissector tables with any types other
694 than the ones listed above. */
695 g_assert_not_reached();
697 g_free(decoded_param); /* "Decode As" rule has been successfully added */
702 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
703 const gchar *message, gpointer user_data)
705 /* ignore log message, if log_level isn't interesting based
706 upon the console log preferences.
707 If the preferences haven't been loaded loaded yet, display the
710 The default console_log_level preference value is such that only
711 ERROR, CRITICAL and WARNING level messages are processed;
712 MESSAGE, INFO and DEBUG level messages are ignored.
714 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
715 ERROR and CRITICAL level messages so the current code is a behavioral
716 change. The current behavior is the same as in Wireshark.
718 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
719 prefs.console_log_level != 0) {
723 g_log_default_handler(log_domain, log_level, message, user_data);
728 output_file_description(const char *fname)
730 char *save_file_string;
732 /* Get a string that describes what we're writing to */
733 if (strcmp(fname, "-") == 0) {
734 /* We're writing to the standard output */
735 save_file_string = g_strdup("standard output");
737 /* We're writing to a file with the name in save_file */
738 save_file_string = g_strdup_printf("file \"%s\"", fname);
740 return save_file_string;
744 print_current_user(void) {
745 gchar *cur_user, *cur_group;
746 if (started_with_special_privs()) {
747 cur_user = get_cur_username();
748 cur_group = get_cur_groupname();
749 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
750 cur_user, cur_group);
753 if (running_with_special_privs()) {
754 fprintf(stderr, " This could be dangerous.");
756 fprintf(stderr, "\n");
761 check_capture_privs(void) {
764 /* Warn the user if npf.sys isn't loaded. */
765 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
766 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
767 "capturing or\nlisting interfaces.\n");
773 show_version(GString *comp_info_str, GString *runtime_info_str)
775 printf("TShark " VERSION "%s\n"
782 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
783 runtime_info_str->str);
787 main(int argc, char *argv[])
789 char *init_progfile_dir_error;
791 gboolean arg_error = FALSE;
797 char *gpf_path, *pf_path;
798 char *gdp_path, *dp_path;
799 int gpf_open_errno, gpf_read_errno;
800 int pf_open_errno, pf_read_errno;
801 int gdp_open_errno, gdp_read_errno;
802 int dp_open_errno, dp_read_errno;
806 gboolean list_link_layer_types = FALSE;
807 gboolean start_capture = FALSE;
812 interface_options interface_opts;
814 gboolean capture_option_specified = FALSE;
816 gboolean quiet = FALSE;
817 #ifdef PCAP_NG_DEFAULT
818 int out_file_type = WTAP_FILE_PCAPNG;
820 int out_file_type = WTAP_FILE_PCAP;
822 gboolean out_file_name_res = FALSE;
823 gchar *cf_name = NULL, *rfilter = NULL;
824 #ifdef HAVE_PCAP_OPEN_DEAD
825 struct bpf_program fcode;
827 dfilter_t *rfcode = NULL;
830 GLogLevelFlags log_flags;
832 gchar *output_only = NULL;
835 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
836 #define OPTSTRING_B "B:"
838 #define OPTSTRING_B ""
839 #endif /* _WIN32 or HAVE_PCAP_CREATE */
840 #else /* HAVE_LIBPCAP */
841 #define OPTSTRING_B ""
842 #endif /* HAVE_LIBPCAP */
844 #ifdef HAVE_PCAP_CREATE
845 #define OPTSTRING_I "I"
847 #define OPTSTRING_I ""
850 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:St:T:u:vVw:W:xX:y:z:"
852 static const char optstring[] = OPTSTRING;
855 arg_list_utf_16to8(argc, argv);
859 * Get credential information for later use.
861 init_process_policies();
864 * Attempt to get the pathname of the executable file.
866 init_progfile_dir_error = init_progfile_dir(argv[0], main);
867 if (init_progfile_dir_error != NULL) {
868 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
869 init_progfile_dir_error);
873 * In order to have the -X opts assigned before the wslua machine starts
874 * we need to call getopts before epan_init() gets called.
877 optind_initial = optind;
879 while ((opt = getopt(argc, argv, optstring)) != -1) {
881 case 'C': /* Configuration Profile */
882 if (profile_exists (optarg, FALSE)) {
883 set_profile_name (optarg);
885 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
897 optind = optind_initial;
902 /** Send All g_log messages to our own handler **/
906 G_LOG_LEVEL_CRITICAL|
911 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
913 g_log_set_handler(NULL,
915 tshark_log_handler, NULL /* user_data */);
916 g_log_set_handler(LOG_DOMAIN_MAIN,
918 tshark_log_handler, NULL /* user_data */);
921 g_log_set_handler(LOG_DOMAIN_CAPTURE,
923 tshark_log_handler, NULL /* user_data */);
924 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
926 tshark_log_handler, NULL /* user_data */);
929 initialize_funnel_ops();
932 capture_opts_init(&global_capture_opts, &cfile);
935 timestamp_set_type(TS_RELATIVE);
936 timestamp_set_precision(TS_PREC_AUTO);
937 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
939 /* Register all dissectors; we must do this before checking for the
940 "-G" flag, as the "-G" flag dumps information registered by the
941 dissectors, and we must do it before we read the preferences, in
942 case any dissectors register preferences. */
943 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
944 failure_message, open_failure_message, read_failure_message,
945 write_failure_message);
947 /* Register all tap listeners; we do this before we parse the arguments,
948 as the "-z" argument can specify a registered tap. */
950 /* we register the plugin taps before the other taps because
951 stats_tree taps plugins will be registered as tap listeners
952 by stats_tree_stat.c and need to registered before that */
954 register_all_plugin_tap_listeners();
956 register_all_tap_listeners();
958 /* Now register the preferences for any non-dissector modules.
959 We must do that before we read the preferences as well. */
960 prefs_register_modules();
962 /* If invoked with the "-G" flag, we dump out information based on
963 the argument to the "-G" flag; if no argument is specified,
964 for backwards compatibility we dump out a glossary of display
967 XXX - we do this here, for now, to support "-G" with no arguments.
968 If none of our build or other processes uses "-G" with no arguments,
969 we can just process it with the other arguments. */
970 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
971 proto_initialize_all_prefixes();
974 proto_registrar_dump_fields(1);
976 if (strcmp(argv[2], "fields") == 0)
977 proto_registrar_dump_fields(1);
978 else if (strcmp(argv[2], "fields2") == 0)
979 proto_registrar_dump_fields(2);
980 else if (strcmp(argv[2], "fields3") == 0)
981 proto_registrar_dump_fields(3);
982 else if (strcmp(argv[2], "protocols") == 0)
983 proto_registrar_dump_protocols();
984 else if (strcmp(argv[2], "values") == 0)
985 proto_registrar_dump_values();
986 else if (strcmp(argv[2], "decodes") == 0)
987 dissector_dump_decodes();
988 else if (strcmp(argv[2], "defaultprefs") == 0)
990 else if (strcmp(argv[2], "plugins") == 0)
992 else if (strcmp(argv[2], "?") == 0)
993 glossary_option_help();
994 else if (strcmp(argv[2], "-?") == 0)
995 glossary_option_help();
996 else if (strcmp(argv[2], "currentprefs") == 0) {
997 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
998 &pf_open_errno, &pf_read_errno, &pf_path);
1001 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1008 /* Set the C-language locale to the native environment. */
1009 setlocale(LC_ALL, "");
1011 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1012 &pf_open_errno, &pf_read_errno, &pf_path);
1013 if (gpf_path != NULL) {
1014 if (gpf_open_errno != 0) {
1015 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1016 pf_path, g_strerror(gpf_open_errno));
1018 if (gpf_read_errno != 0) {
1019 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1020 pf_path, g_strerror(gpf_read_errno));
1023 if (pf_path != NULL) {
1024 if (pf_open_errno != 0) {
1025 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1026 g_strerror(pf_open_errno));
1028 if (pf_read_errno != 0) {
1029 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1030 pf_path, g_strerror(pf_read_errno));
1036 /* Set the name resolution code's flags from the preferences. */
1037 gbl_resolv_flags = prefs_p->name_resolve;
1039 /* Read the disabled protocols file. */
1040 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1041 &dp_path, &dp_open_errno, &dp_read_errno);
1042 if (gdp_path != NULL) {
1043 if (gdp_open_errno != 0) {
1044 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1045 gdp_path, g_strerror(gdp_open_errno));
1047 if (gdp_read_errno != 0) {
1048 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1049 gdp_path, g_strerror(gdp_read_errno));
1053 if (dp_path != NULL) {
1054 if (dp_open_errno != 0) {
1056 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1057 g_strerror(dp_open_errno));
1059 if (dp_read_errno != 0) {
1061 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1062 g_strerror(dp_read_errno));
1067 check_capture_privs();
1069 cap_file_init(&cfile);
1071 /* Print format defaults to this. */
1072 print_format = PR_FMT_TEXT;
1074 output_fields = output_fields_new();
1076 /* Now get our args */
1077 while ((opt = getopt(argc, argv, optstring)) != -1) {
1079 case 'a': /* autostop criteria */
1080 case 'b': /* Ringbuffer option */
1081 case 'c': /* Capture x packets */
1082 case 'f': /* capture filter */
1083 case 'i': /* Use interface x */
1084 case 'p': /* Don't capture in promiscuous mode */
1085 #ifdef HAVE_PCAP_CREATE
1086 case 'I': /* Capture in monitor mode, if available */
1088 case 's': /* Set the snapshot (capture) length */
1089 case 'w': /* Write to capture file x */
1090 case 'y': /* Set the pcap data link type */
1091 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1092 case 'B': /* Buffer size */
1093 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1095 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1100 capture_option_specified = TRUE;
1105 /* Configuration profile settings were already processed just ignore them this time*/
1107 case 'd': /* Decode as rule */
1108 if (!add_decode_as(optarg))
1111 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1112 case 'K': /* Kerberos keytab file */
1113 read_keytab_file(optarg);
1116 case 'D': /* Print a list of capture devices and exit */
1118 if_list = capture_interface_list(&err, &err_str);
1119 if (if_list == NULL) {
1121 case CANT_GET_INTERFACE_LIST:
1122 cmdarg_err("%s", err_str);
1126 case NO_INTERFACES_FOUND:
1127 cmdarg_err("There are no interfaces on which a capture can be done");
1132 capture_opts_print_interfaces(if_list);
1133 free_interface_list(if_list);
1136 capture_option_specified = TRUE;
1142 output_fields_add(output_fields, optarg);
1146 if(!output_fields_set_option(output_fields, optarg)) {
1147 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1148 output_fields_list_options(stderr);
1153 out_file_type = wtap_short_string_to_file_type(optarg);
1154 if (out_file_type < 0) {
1155 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1156 list_capture_types();
1160 case 'W': /* Select extra information to save in our capture file */
1161 /* This is patterned after the -N flag which may not be the best idea. */
1162 if (strchr(optarg, 'n'))
1163 out_file_name_res = TRUE;
1165 case 'H': /* Read address to name mappings from a hosts file */
1166 if (! read_hosts_file(optarg))
1168 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1171 out_file_name_res = TRUE;
1174 case 'h': /* Print help and exit */
1178 case 'l': /* "Line-buffer" standard output */
1179 /* This isn't line-buffering, strictly speaking, it's just
1180 flushing the standard output after the information for
1181 each packet is printed; however, that should be good
1182 enough for all the purposes to which "-l" is put (and
1183 is probably actually better for "-V", as it does fewer
1186 See the comment in "process_packet()" for an explanation of
1187 why we do that, and why we don't just use "setvbuf()" to
1188 make the standard output line-buffered (short version: in
1189 Windows, "line-buffered" is the same as "fully-buffered",
1190 and the output buffer is only flushed when it fills up). */
1191 line_buffered = TRUE;
1193 case 'L': /* Print list of link-layer types and exit */
1195 list_link_layer_types = TRUE;
1197 capture_option_specified = TRUE;
1201 case 'P': /* Perform two pass analysis */
1202 perform_two_pass_analysis = TRUE;
1204 case 'n': /* No name resolution */
1205 gbl_resolv_flags = RESOLV_NONE;
1207 case 'N': /* Select what types of addresses/port #s to resolve */
1208 if (gbl_resolv_flags == RESOLV_ALL)
1209 gbl_resolv_flags = RESOLV_NONE;
1210 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1211 if (badopt != '\0') {
1212 cmdarg_err("-N specifies unknown resolving option '%c';",
1214 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1218 case 'o': /* Override preference from command line */
1219 switch (prefs_set_pref(optarg)) {
1224 case PREFS_SET_SYNTAX_ERR:
1225 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1229 case PREFS_SET_NO_SUCH_PREF:
1230 case PREFS_SET_OBSOLETE:
1231 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1236 case 'O': /* Only output these protocols */
1237 output_only = g_strdup(optarg);
1239 case 'q': /* Quiet */
1242 case 'r': /* Read capture file x */
1243 cf_name = g_strdup(optarg);
1245 case 'R': /* Read file filter */
1248 case 'S': /* show packets in real time */
1249 print_packet_info = TRUE;
1251 case 't': /* Time stamp type */
1252 if (strcmp(optarg, "r") == 0)
1253 timestamp_set_type(TS_RELATIVE);
1254 else if (strcmp(optarg, "a") == 0)
1255 timestamp_set_type(TS_ABSOLUTE);
1256 else if (strcmp(optarg, "ad") == 0)
1257 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1258 else if (strcmp(optarg, "d") == 0)
1259 timestamp_set_type(TS_DELTA);
1260 else if (strcmp(optarg, "dd") == 0)
1261 timestamp_set_type(TS_DELTA_DIS);
1262 else if (strcmp(optarg, "e") == 0)
1263 timestamp_set_type(TS_EPOCH);
1264 else if (strcmp(optarg, "u") == 0)
1265 timestamp_set_type(TS_UTC);
1266 else if (strcmp(optarg, "ud") == 0)
1267 timestamp_set_type(TS_UTC_WITH_DATE);
1269 cmdarg_err("Invalid time stamp type \"%s\"",
1271 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1272 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1276 case 'T': /* printing Type */
1277 if (strcmp(optarg, "text") == 0) {
1278 output_action = WRITE_TEXT;
1279 print_format = PR_FMT_TEXT;
1280 } else if (strcmp(optarg, "ps") == 0) {
1281 output_action = WRITE_TEXT;
1282 print_format = PR_FMT_PS;
1283 } else if (strcmp(optarg, "pdml") == 0) {
1284 output_action = WRITE_XML;
1286 } else if (strcmp(optarg, "psml") == 0) {
1287 output_action = WRITE_XML;
1289 } else if(strcmp(optarg, "fields") == 0) {
1290 output_action = WRITE_FIELDS;
1291 verbose = TRUE; /* Need full tree info */
1293 cmdarg_err("Invalid -T parameter.");
1294 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1298 case 'u': /* Seconds type */
1299 if (strcmp(optarg, "s") == 0)
1300 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1301 else if (strcmp(optarg, "hms") == 0)
1302 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1304 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1305 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1309 case 'v': /* Show version and exit */
1311 GString *comp_info_str;
1312 GString *runtime_info_str;
1313 /* Assemble the compile-time version information string */
1314 comp_info_str = g_string_new("Compiled ");
1315 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1317 /* Assemble the run-time version information string */
1318 runtime_info_str = g_string_new("Running ");
1319 get_runtime_version_info(runtime_info_str, NULL);
1320 show_version(comp_info_str, runtime_info_str);
1321 g_string_free(comp_info_str, TRUE);
1322 g_string_free(runtime_info_str, TRUE);
1326 case 'V': /* Verbose */
1328 /* The user asked for a verbose output, so let's ensure they get it,
1329 * even if they're writing to a file.
1331 print_packet_info = TRUE;
1333 case 'x': /* Print packet data in hex (and ASCII) */
1335 /* The user asked for hex output, so let's ensure they get it,
1336 * even if they're writing to a file.
1338 print_packet_info = TRUE;
1343 /* We won't call the init function for the stat this soon
1344 as it would disallow MATE's fields (which are registered
1345 by the preferences set callback) from being used as
1346 part of a tap filter. Instead, we just add the argument
1347 to a list of stat arguments. */
1348 if (!process_stat_cmd_arg(optarg)) {
1349 cmdarg_err("invalid -z argument.");
1350 cmdarg_err_cont(" -z argument must be one of :");
1351 list_stat_cmd_args();
1356 case '?': /* Bad flag - print usage message */
1359 list_capture_types();
1369 /* If we specified output fields, but not the output field type... */
1370 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1371 cmdarg_err("Output fields were specified with \"-e\", "
1372 "but \"-Tfields\" was not specified.");
1374 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1375 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1376 "specified with \"-e\".");
1381 /* If no capture filter or read filter has been specified, and there are
1382 still command-line arguments, treat them as the tokens of a capture
1383 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1384 flag was specified. */
1385 if (optind < argc) {
1386 if (cf_name != NULL) {
1387 if (rfilter != NULL) {
1388 cmdarg_err("Read filters were specified both with \"-R\" "
1389 "and with additional command-line arguments.");
1392 rfilter = get_args_as_string(argc, argv, optind);
1395 if (global_capture_opts.default_options.cfilter) {
1396 cmdarg_err("A default capture filter was specified both with \"-f\""
1397 " and with additional command-line arguments.");
1400 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1401 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1402 if (interface_opts.cfilter == NULL) {
1403 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1404 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1405 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1407 cmdarg_err("A capture filter was specified both with \"-f\""
1408 " and with additional command-line arguments.");
1412 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1414 capture_option_specified = TRUE;
1420 if (!global_capture_opts.saving_to_file) {
1421 /* We're not saving the capture to a file; if "-q" wasn't specified,
1422 we should print packet information */
1424 print_packet_info = TRUE;
1426 /* We're saving to a file; if we're writing to the standard output.
1427 and we'll also be writing dissected packets to the standard
1428 output, reject the request. At best, we could redirect that
1429 to the standard error; we *can't* write both to the standard
1430 output and have either of them be useful. */
1431 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1432 cmdarg_err("You can't write both raw packet data and dissected packets"
1433 " to the standard output.");
1438 /* We're not saving the capture to a file; if "-q" wasn't specified,
1439 we should print packet information */
1441 print_packet_info = TRUE;
1444 #ifndef HAVE_LIBPCAP
1445 if (capture_option_specified)
1446 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1453 /* We don't support capture filters when reading from a capture file
1454 (the BPF compiler doesn't support all link-layer types that we
1455 support in capture files we read). */
1457 if (cf_name != NULL) {
1458 if (global_capture_opts.default_options.cfilter) {
1459 cmdarg_err("Only read filters, not capture filters, "
1460 "can be specified when reading a capture file.");
1467 if (output_action != WRITE_TEXT) {
1468 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1473 if (output_only != NULL) {
1477 cmdarg_err("-O requires -V");
1481 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1482 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1483 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1488 if (list_link_layer_types) {
1489 /* We're supposed to list the link-layer types for an interface;
1490 did the user also specify a capture file to be read? */
1492 /* Yes - that's bogus. */
1493 cmdarg_err("You can't specify -L and a capture file to be read.");
1496 /* No - did they specify a ring buffer option? */
1497 if (global_capture_opts.multi_files_on) {
1498 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1504 * "-r" was specified, so we're reading a capture file.
1505 * Capture options don't apply here.
1507 if (global_capture_opts.multi_files_on) {
1508 cmdarg_err("Multiple capture files requested, but "
1509 "a capture isn't being done.");
1512 if (global_capture_opts.has_file_duration) {
1513 cmdarg_err("Switching capture files after a time interval was specified, but "
1514 "a capture isn't being done.");
1517 if (global_capture_opts.has_ring_num_files) {
1518 cmdarg_err("A ring buffer of capture files was specified, but "
1519 "a capture isn't being done.");
1522 if (global_capture_opts.has_autostop_files) {
1523 cmdarg_err("A maximum number of capture files was specified, but "
1524 "a capture isn't being done.");
1528 /* Note: TShark now allows the restriction of a _read_ file by packet count
1529 * and byte count as well as a write file. Other autostop options remain valid
1530 * only for a write file.
1532 if (global_capture_opts.has_autostop_duration) {
1533 cmdarg_err("A maximum capture time was specified, but "
1534 "a capture isn't being done.");
1539 * "-r" wasn't specified, so we're doing a live capture.
1541 if (global_capture_opts.saving_to_file) {
1542 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1544 /* When capturing, we only support writing pcap or pcap-ng format. */
1545 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1546 cmdarg_err("Live captures can only be saved in libpcap format.");
1549 if (global_capture_opts.multi_files_on) {
1550 /* Multiple-file mode doesn't work under certain conditions:
1551 a) it doesn't work if you're writing to the standard output;
1552 b) it doesn't work if you're writing to a pipe;
1554 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1555 cmdarg_err("Multiple capture files requested, but "
1556 "the capture is being written to the standard output.");
1559 if (global_capture_opts.output_to_pipe) {
1560 cmdarg_err("Multiple capture files requested, but "
1561 "the capture file is a pipe.");
1564 if (!global_capture_opts.has_autostop_filesize &&
1565 !global_capture_opts.has_file_duration) {
1566 cmdarg_err("Multiple capture files requested, but "
1567 "no maximum capture file size or duration was specified.");
1571 /* Currently, we don't support read filters when capturing
1572 and saving the packets. */
1573 if (rfilter != NULL) {
1574 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1578 /* They didn't specify a "-w" flag, so we won't be saving to a
1579 capture file. Check for options that only make sense if
1580 we're saving to a file. */
1581 if (global_capture_opts.has_autostop_filesize) {
1582 cmdarg_err("Maximum capture file size specified, but "
1583 "capture isn't being saved to a file.");
1586 if (global_capture_opts.multi_files_on) {
1587 cmdarg_err("Multiple capture files requested, but "
1588 "the capture isn't being saved to a file.");
1597 /* Start windows sockets */
1598 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1601 /* Notify all registered modules that have had any of their preferences
1602 changed either from one of the preferences file or from the command
1603 line that their preferences have changed. */
1606 /* At this point MATE will have registered its field array so we can
1607 have a tap filter with one of MATE's late-registered fields as part
1608 of the filter. We can now process all the "-z" arguments. */
1609 start_requested_stats();
1612 /* We currently don't support taps, or printing dissected packets,
1613 if we're writing to a pipe. */
1614 if (global_capture_opts.saving_to_file &&
1615 global_capture_opts.output_to_pipe) {
1616 if (tap_listeners_require_dissection()) {
1617 cmdarg_err("Taps aren't supported when saving to a pipe.");
1620 if (print_packet_info) {
1621 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1627 /* disabled protocols as per configuration file */
1628 if (gdp_path == NULL && dp_path == NULL) {
1629 set_disabled_protos_list();
1632 /* Build the column format array */
1633 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1636 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1637 capture_opts_trim_ring_num_files(&global_capture_opts);
1640 if (rfilter != NULL) {
1641 if (!dfilter_compile(rfilter, &rfcode)) {
1642 cmdarg_err("%s", dfilter_error_msg);
1644 #ifdef HAVE_PCAP_OPEN_DEAD
1648 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1650 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1652 " Note: That display filter code looks like a valid capture filter;");
1654 " maybe you mixed them up?");
1663 cfile.rfcode = rfcode;
1665 if (print_packet_info) {
1666 /* If we're printing as text or PostScript, we have
1667 to create a print stream. */
1668 if (output_action == WRITE_TEXT) {
1669 switch (print_format) {
1672 print_stream = print_stream_text_stdio_new(stdout);
1676 print_stream = print_stream_ps_stdio_new(stdout);
1680 g_assert_not_reached();
1685 /* We have to dissect each packet if:
1687 we're printing information about each packet;
1689 we're using a read filter on the packets;
1691 we're using any taps that need dissection. */
1692 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1696 * We're reading a capture file.
1700 * Immediately relinquish any special privileges we have; we must not
1701 * be allowed to read any capture files the user running TShark
1704 relinquish_special_privs_perm();
1705 print_current_user();
1707 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1712 /* Set timestamp precision; there should arguably be a command-line
1713 option to let the user set this. */
1714 switch(wtap_file_tsprecision(cfile.wth)) {
1715 case(WTAP_FILE_TSPREC_SEC):
1716 timestamp_set_precision(TS_PREC_AUTO_SEC);
1718 case(WTAP_FILE_TSPREC_DSEC):
1719 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1721 case(WTAP_FILE_TSPREC_CSEC):
1722 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1724 case(WTAP_FILE_TSPREC_MSEC):
1725 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1727 case(WTAP_FILE_TSPREC_USEC):
1728 timestamp_set_precision(TS_PREC_AUTO_USEC);
1730 case(WTAP_FILE_TSPREC_NSEC):
1731 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1734 g_assert_not_reached();
1737 /* Process the packets in the file */
1739 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1740 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1741 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1743 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1746 /* We still dump out the results of taps, etc., as we might have
1747 read some packets; however, we exit with an error status. */
1751 /* No capture file specified, so we're supposed to do a live capture
1752 (or get a list of link-layer types for a live capture device);
1753 do we have support for live captures? */
1760 cmdarg_err("WinPcap couldn't be found.");
1761 detailed_err = cant_load_winpcap_err("TShark");
1762 cmdarg_err_cont("%s", detailed_err);
1763 g_free(detailed_err);
1768 /* trim the interface name and exit if that failed */
1769 if (!capture_opts_trim_iface(&global_capture_opts,
1770 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1774 /* if requested, list the link layer types and exit */
1775 if (list_link_layer_types) {
1777 interface_options interface_opts;
1779 /* Get the list of link-layer types for the capture devices. */
1780 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1781 if_capabilities_t *caps;
1783 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1784 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1786 cmdarg_err("%s", err_str);
1790 if (caps->data_link_types == NULL) {
1791 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1794 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1795 free_if_capabilities(caps);
1800 if (print_packet_info) {
1801 if (!write_preamble(NULL)) {
1802 show_print_file_io_error(errno);
1805 } else if (!quiet) {
1807 * We're not printing information for each packet, and the user
1808 * didn't ask us not to print a count of packets as they arrive,
1809 * so print that count so the user knows that packets are arriving.
1811 * XXX - what if the user wants to do a live capture, doesn't want
1812 * to save it to a file, doesn't want information printed for each
1813 * packet, does want some "-z" statistic, and wants packet counts
1814 * so they know whether they're seeing any packets?
1816 print_packet_counts = TRUE;
1819 /* For now, assume libpcap gives microsecond precision. */
1820 timestamp_set_precision(TS_PREC_AUTO_USEC);
1823 * XXX - this returns FALSE if an error occurred, but it also
1824 * returns FALSE if the capture stops because a time limit
1825 * was reached (and possibly other limits), so we can't assume
1826 * it means an error.
1828 * The capture code is a bit twisty, so it doesn't appear to
1829 * be an easy fix. We just ignore the return value for now.
1830 * Instead, pass on the exit status from the capture child.
1833 exit_status = global_capture_opts.fork_child_status;
1835 if (print_packet_info) {
1836 if (!write_finale()) {
1838 show_print_file_io_error(err);
1842 /* No - complain. */
1843 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1850 if (cfile.frames != NULL) {
1851 free_frame_data_sequence(cfile.frames);
1852 cfile.frames = NULL;
1855 draw_tap_listeners(TRUE);
1856 funnel_dump_all_text_windows();
1859 output_fields_free(output_fields);
1860 output_fields = NULL;
1865 /*#define USE_BROKEN_G_MAIN_LOOP*/
1867 #ifdef USE_BROKEN_G_MAIN_LOOP
1870 gboolean loop_running = FALSE;
1872 guint32 packet_count = 0;
1875 /* XXX - move to the right position / file */
1876 /* read from a pipe (callback) */
1877 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1879 typedef struct pipe_input_tag {
1883 pipe_input_cb_t input_cb;
1884 guint pipe_input_id;
1886 GStaticMutex callback_running;
1890 static pipe_input_t pipe_input;
1893 /* The timer has expired, see if there's stuff to read from the pipe,
1894 if so, do the callback */
1896 pipe_timer_cb(gpointer data)
1900 gboolean result, result1;
1902 pipe_input_t *pipe_input_p = data;
1903 gint iterations = 0;
1906 g_static_mutex_lock (&pipe_input_p->callback_running);
1908 /* try to read data from the pipe only 5 times, to avoid blocking */
1909 while(iterations < 5) {
1910 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1912 /* Oddly enough although Named pipes don't work on win9x,
1913 PeekNamedPipe does !!! */
1914 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1915 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1917 /* Get the child process exit status */
1918 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1921 /* If the Peek returned an error, or there are bytes to be read
1922 or the childwatcher thread has terminated then call the normal
1924 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1926 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1928 /* And call the real handler */
1929 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1930 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1931 /* pipe closed, return false so that the timer is stopped */
1932 g_static_mutex_unlock (&pipe_input_p->callback_running);
1937 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1938 /* No data, stop now */
1945 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1947 g_static_mutex_unlock (&pipe_input_p->callback_running);
1949 /* we didn't stopped the timer, so let it run */
1956 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1959 pipe_input.source = source;
1960 pipe_input.child_process = child_process;
1961 pipe_input.user_data = user_data;
1962 pipe_input.input_cb = input_cb;
1965 g_static_mutex_init(&pipe_input.callback_running);
1966 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1967 do this but that doesn't cover all win32 platforms. GTK can do
1968 this but doesn't seem to work over processes. Attempt to do
1969 something similar here, start a timer and check for data on every
1971 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1972 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1983 GString *str = g_string_new("");
1984 #ifdef USE_TSHARK_SELECT
1988 struct sigaction action, oldaction;
1992 * XXX - dropping privileges is still required, until code cleanup is done
1994 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1995 * when it's done, we don't need special privileges to run tshark at all,
1996 * therefore we don't need to drop these privileges
1997 * The only thing we might want to keep is a warning if tshark is run as root,
1998 * as it's no longer necessary and potentially dangerous.
2000 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2001 * We've opened the capture device, so we shouldn't need any special
2002 * privileges any more; relinquish those privileges.
2004 * XXX - if we have saved set-user-ID support, we should give up those
2005 * privileges immediately, and then reclaim them long enough to get
2006 * a list of network interfaces and to open one, and then give them
2007 * up again, so that stuff we do while processing the argument list,
2008 * reading the user's preferences, loading and starting plugins
2009 * (especially *user* plugins), etc. is done with the user's privileges,
2010 * not special privileges.
2012 relinquish_special_privs_perm();
2013 print_current_user();
2015 /* Cleanup all data structures used for dissection. */
2016 cleanup_dissection();
2017 /* Initialize all data structures used for dissection. */
2021 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2022 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2024 /* Catch SIGINT and SIGTERM and, if we get either of them,
2025 clean up and exit. If SIGHUP isn't being ignored, catch
2026 it too and, if we get it, clean up and exit.
2028 We restart any read that was in progress, so that it doesn't
2029 disrupt reading from the sync pipe. The signal handler tells
2030 the capture child to finish; it will report that it finished,
2031 or will exit abnormally, so we'll stop reading from the sync
2032 pipe, pick up the exit status, and quit. */
2033 action.sa_handler = capture_cleanup;
2034 action.sa_flags = SA_RESTART;
2035 sigemptyset(&action.sa_mask);
2036 sigaction(SIGTERM, &action, NULL);
2037 sigaction(SIGINT, &action, NULL);
2038 sigaction(SIGHUP, NULL, &oldaction);
2039 if (oldaction.sa_handler == SIG_DFL)
2040 sigaction(SIGHUP, &action, NULL);
2043 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2044 quiet mode, report the number of packets we've captured.
2046 Again, restart any read that was in progress, so that it doesn't
2047 disrupt reading from the sync pipe. */
2048 action.sa_handler = report_counts_siginfo;
2049 action.sa_flags = SA_RESTART;
2050 sigemptyset(&action.sa_mask);
2051 sigaction(SIGINFO, &action, NULL);
2052 #endif /* SIGINFO */
2055 global_capture_opts.state = CAPTURE_PREPARING;
2057 /* Let the user know which interfaces were chosen. */
2058 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2059 interface_options interface_opts;
2061 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2062 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2063 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2064 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2067 if (global_capture_opts.ifaces->len < 2) {
2069 if (global_capture_opts.ifaces->len < 4) {
2071 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2072 interface_options interface_opts;
2074 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2076 if (global_capture_opts.ifaces->len > 2) {
2077 g_string_append_printf(str, ",");
2079 g_string_append_printf(str, " ");
2080 if (i == global_capture_opts.ifaces->len - 1) {
2081 g_string_append_printf(str, "and ");
2084 g_string_append_printf(str, "%s", interface_opts.descr);
2087 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2089 fprintf(stderr, "Capturing on %s\n", str->str);
2090 g_string_free(str, TRUE);
2092 ret = sync_pipe_start(&global_capture_opts);
2097 /* the actual capture loop
2099 * XXX - glib doesn't seem to provide any event based loop handling.
2101 * XXX - for whatever reason,
2102 * calling g_main_loop_new() ends up in 100% cpu load.
2104 * But that doesn't matter: in UNIX we can use select() to find an input
2105 * source with something to do.
2107 * But that doesn't matter because we're in a CLI (that doesn't need to
2108 * update a GUI or something at the same time) so it's OK if we block
2109 * trying to read from the pipe.
2111 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2112 * wrong (but I leave it there in case I am...).
2115 #ifdef USE_TSHARK_SELECT
2117 FD_SET(pipe_input.source, &readfds);
2120 loop_running = TRUE;
2122 while (loop_running)
2124 #ifdef USE_TSHARK_SELECT
2125 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2131 } else if (ret == 1) {
2133 /* Call the real handler */
2134 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2135 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2138 #ifdef USE_TSHARK_SELECT
2147 /* XXX - move the call to main_window_update() out of capture_sync.c */
2148 /* dummy for capture_sync.c to make linker happy */
2149 void main_window_update(void)
2153 /* capture child detected an error */
2155 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2157 cmdarg_err("%s", error_msg);
2158 cmdarg_err_cont("%s", secondary_error_msg);
2162 /* capture child detected an capture filter related error */
2164 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2166 dfilter_t *rfcode = NULL;
2167 interface_options interface_opts;
2169 g_assert(i < capture_opts->ifaces->len);
2170 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2172 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2174 "Invalid capture filter \"%s\" for interface %s!\n"
2176 "That string looks like a valid display filter; however, it isn't a valid\n"
2177 "capture filter (%s).\n"
2179 "Note that display filters and capture filters don't have the same syntax,\n"
2180 "so you can't use most display filter expressions as capture filters.\n"
2182 "See the User's Guide for a description of the capture filter syntax.",
2183 interface_opts.cfilter, interface_opts.descr, error_message);
2184 dfilter_free(rfcode);
2187 "Invalid capture filter \"%s\" for interface %s!\n"
2189 "That string isn't a valid capture filter (%s).\n"
2190 "See the User's Guide for a description of the capture filter syntax.",
2191 interface_opts.cfilter, interface_opts.descr, error_message);
2196 /* capture child tells us we have a new (or the first) capture file */
2198 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2200 gboolean is_tempfile;
2203 if(capture_opts->state == CAPTURE_PREPARING) {
2204 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2206 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2208 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2210 /* free the old filename */
2211 if (capture_opts->save_file != NULL) {
2213 /* we start a new capture file, close the old one (if we had one before) */
2214 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2215 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2216 wtap_close(((capture_file *) capture_opts->cf)->wth);
2218 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2221 g_free(capture_opts->save_file);
2222 is_tempfile = FALSE;
2224 /* we didn't had a save_file before, must be a tempfile */
2228 /* save the new filename */
2229 capture_opts->save_file = g_strdup(new_file);
2231 /* if we are in real-time mode, open the new file now */
2233 /* Attempt to open the capture file and set up to read from it. */
2234 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2238 /* Don't unlink (delete) the save file - leave it around,
2239 for debugging purposes. */
2240 g_free(capture_opts->save_file);
2241 capture_opts->save_file = NULL;
2246 capture_opts->state = CAPTURE_RUNNING;
2252 /* capture child tells us we have new packets to read */
2254 capture_input_new_packets(capture_options *capture_opts, int to_read)
2260 capture_file *cf = capture_opts->cf;
2261 gboolean filtering_tap_listeners;
2266 * Prevent a SIGINFO handler from writing to the standard error while
2267 * we're doing so or writing to the standard output; instead, have it
2268 * just set a flag telling us to print that information when we're done.
2271 #endif /* SIGINFO */
2273 /* Do we have any tap listeners with filters? */
2274 filtering_tap_listeners = have_filtering_tap_listeners();
2276 /* Get the union of the flags for all tap listeners. */
2277 tap_flags = union_of_tap_listener_flags();
2280 while (to_read-- && cf->wth) {
2281 wtap_cleareof(cf->wth);
2282 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2284 /* read from file failed, tell the capture child to stop */
2285 sync_pipe_stop(capture_opts);
2286 wtap_close(cf->wth);
2289 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2290 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2291 filtering_tap_listeners, tap_flags);
2294 /* packet successfully read and gone through the "Read Filter" */
2300 * Dumpcap's doing all the work; we're not doing any dissection.
2301 * Count all the packets it wrote.
2303 packet_count += to_read;
2306 if (print_packet_counts) {
2307 /* We're printing packet counts. */
2308 if (packet_count != 0) {
2309 fprintf(stderr, "\r%u ", packet_count);
2310 /* stderr could be line buffered */
2317 * Allow SIGINFO handlers to write.
2322 * If a SIGINFO handler asked us to write out capture counts, do so.
2326 #endif /* SIGINFO */
2332 if (!print_packet_counts) {
2333 /* Report the count only if we aren't printing a packet count
2334 as packets arrive. */
2335 fprintf(stderr, "%u packet%s captured\n", packet_count,
2336 plurality(packet_count, "", "s"));
2339 infoprint = FALSE; /* we just reported it */
2340 #endif /* SIGINFO */
2345 report_counts_siginfo(int signum _U_)
2347 int sav_errno = errno;
2348 /* If we've been told to delay printing, just set a flag asking
2349 that we print counts (if we're supposed to), otherwise print
2350 the count of packets captured (if we're supposed to). */
2357 #endif /* SIGINFO */
2360 /* capture child detected any packet drops? */
2362 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2364 if (print_packet_counts) {
2365 /* We're printing packet counts to stderr.
2366 Send a newline so that we move to the line after the packet count. */
2367 fprintf(stderr, "\n");
2371 /* We're printing packet counts to stderr.
2372 Send a newline so that we move to the line after the packet count. */
2373 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2379 * Capture child closed its side of the pipe, report any error and
2380 * do the required cleanup.
2383 capture_input_closed(capture_options *capture_opts, gchar *msg)
2386 fprintf(stderr, "tshark: %s\n", msg);
2390 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2391 wtap_close(((capture_file *) capture_opts->cf)->wth);
2392 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2393 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2396 #ifdef USE_BROKEN_G_MAIN_LOOP
2397 /*g_main_loop_quit(loop);*/
2400 loop_running = FALSE;
2409 capture_cleanup(DWORD ctrltype _U_)
2411 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2412 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2413 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2414 like SIGTERM at least when the machine's shutting down.
2416 For now, we handle them all as indications that we should clean up
2417 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2420 We must return TRUE so that no other handler - such as one that would
2421 terminate the process - gets called.
2423 XXX - for some reason, typing ^C to TShark, if you run this in
2424 a Cygwin console window in at least some versions of Cygwin,
2425 causes TShark to terminate immediately; this routine gets
2426 called, but the main loop doesn't get a chance to run and
2427 exit cleanly, at least if this is compiled with Microsoft Visual
2428 C++ (i.e., it's a property of the Cygwin console window or Bash;
2429 it happens if TShark is not built with Cygwin - for all I know,
2430 building it with Cygwin may make the problem go away). */
2432 /* tell the capture child to stop */
2433 sync_pipe_stop(&global_capture_opts);
2435 /* don't stop our own loop already here, otherwise status messages and
2436 * cleanup wouldn't be done properly. The child will indicate the stop of
2437 * everything by calling capture_input_closed() later */
2443 capture_cleanup(int signum _U_)
2445 /* tell the capture child to stop */
2446 sync_pipe_stop(&global_capture_opts);
2448 /* don't stop our own loop already here, otherwise status messages and
2449 * cleanup wouldn't be done properly. The child will indicate the stop of
2450 * everything by calling capture_input_closed() later */
2453 #endif /* HAVE_LIBPCAP */
2456 process_packet_first_pass(capture_file *cf,
2457 gint64 offset, const struct wtap_pkthdr *whdr,
2458 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2465 /* The frame number of this packet is one more than the count of
2466 frames in this packet. */
2467 framenum = cf->count + 1;
2469 /* If we're not running a display filter and we're not printing any
2470 packet information, we don't need to do a dissection. This means
2471 that all packets can be marked as 'passed'. */
2474 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2476 /* If we're going to print packet information, or we're going to
2477 run a read filter, or we're going to process taps, set up to
2478 do a dissection and do so. */
2479 if (do_dissection) {
2480 if (gbl_resolv_flags)
2481 /* Grab any resolved addresses */
2482 host_name_lookup_process(NULL);
2484 /* The protocol tree will be "visible", i.e., printed, only if we're
2485 printing packet details, which is true if we're printing stuff
2486 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2488 epan_dissect_init(&edt, FALSE, FALSE);
2490 /* If we're running a read filter, prime the epan_dissect_t with that
2493 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2495 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2496 &first_ts, &prev_dis_ts, &prev_cap_ts);
2498 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2500 /* Run the read filter if we have one. */
2502 passed = dfilter_apply_edt(cf->rfcode, &edt);
2506 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2507 frame_data_sequence_add(cf->frames, &fdlocal);
2512 epan_dissect_cleanup(&edt);
2518 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2519 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2520 gboolean filtering_tap_listeners, guint tap_flags)
2522 gboolean create_proto_tree;
2527 /* If we're not running a display filter and we're not printing any
2528 packet information, we don't need to do a dissection. This means
2529 that all packets can be marked as 'passed'. */
2532 /* If we're going to print packet information, or we're going to
2533 run a read filter, or we're going to process taps, set up to
2534 do a dissection and do so. */
2535 if (do_dissection) {
2536 if (gbl_resolv_flags)
2537 /* Grab any resolved addresses */
2538 host_name_lookup_process(NULL);
2540 if (cf->rfcode || verbose || filtering_tap_listeners ||
2541 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2542 create_proto_tree = TRUE;
2544 create_proto_tree = FALSE;
2546 /* The protocol tree will be "visible", i.e., printed, only if we're
2547 printing packet details, which is true if we're printing stuff
2548 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2550 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2552 /* If we're running a read filter, prime the epan_dissect_t with that
2555 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2557 col_custom_prime_edt(&edt, &cf->cinfo);
2559 tap_queue_init(&edt);
2561 /* We only need the columns if either
2563 1) some tap needs the columns
2567 2) we're printing packet info but we're *not* verbose; in verbose
2568 mode, we print the protocol tree, not the protocol summary. */
2569 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2574 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2576 tap_push_tapped_queue(&edt);
2578 /* Run the read filter if we have one. */
2580 passed = dfilter_apply_edt(cf->rfcode, &edt);
2584 /* Process this packet. */
2585 if (print_packet_info) {
2586 /* We're printing packet information; print the information for
2589 print_packet(cf, &edt);
2591 print_packet(cf, NULL);
2593 /* The ANSI C standard does not appear to *require* that a line-buffered
2594 stream be flushed to the host environment whenever a newline is
2595 written, it just says that, on such a stream, characters "are
2596 intended to be transmitted to or from the host environment as a
2597 block when a new-line character is encountered".
2599 The Visual C++ 6.0 C implementation doesn't do what is intended;
2600 even if you set a stream to be line-buffered, it still doesn't
2601 flush the buffer at the end of every line.
2603 So, if the "-l" flag was specified, we flush the standard output
2604 at the end of a packet. This will do the right thing if we're
2605 printing packet summary lines, and, as we print the entire protocol
2606 tree for a single packet without waiting for anything to happen,
2607 it should be as good as line-buffered mode if we're printing
2608 protocol trees. (The whole reason for the "-l" flag in either
2609 tcpdump or TShark is to allow the output of a live capture to
2610 be piped to a program or script and to have that script see the
2611 information for the packet as soon as it's printed, rather than
2612 having to wait until a standard I/O buffer fills up. */
2616 if (ferror(stdout)) {
2617 show_print_file_io_error(errno);
2623 if (do_dissection) {
2624 epan_dissect_cleanup(&edt);
2630 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2631 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2634 int snapshot_length;
2637 gchar *err_info = NULL;
2639 char *save_file_string = NULL;
2640 gboolean filtering_tap_listeners;
2643 #ifdef PCAP_NG_DEFAULT
2644 linktype = WTAP_ENCAP_PER_PACKET;
2646 linktype = wtap_file_encap(cf->wth);
2648 if (save_file != NULL) {
2649 /* Get a string that describes what we're writing to */
2650 save_file_string = output_file_description(save_file);
2652 /* Set up to write to the capture file. */
2653 snapshot_length = wtap_snapshot_length(cf->wth);
2654 if (snapshot_length == 0) {
2655 /* Snapshot length of input file not known. */
2656 snapshot_length = WTAP_MAX_PACKET_SIZE;
2658 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2659 FALSE /* compressed */, &err);
2662 /* We couldn't set up to write to the capture file. */
2665 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2666 cmdarg_err("Capture files can't be written in that format.");
2669 case WTAP_ERR_UNSUPPORTED_ENCAP:
2670 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2671 cmdarg_err("The capture file being read can't be written in "
2672 "the format \"%s\".", wtap_encap_short_string(linktype));
2675 case WTAP_ERR_CANT_OPEN:
2676 cmdarg_err("The %s couldn't be created for some "
2677 "unknown reason.", save_file_string);
2680 case WTAP_ERR_SHORT_WRITE:
2681 cmdarg_err("A full header couldn't be written to the %s.",
2686 cmdarg_err("The %s could not be created: %s.", save_file_string,
2687 wtap_strerror(err));
2693 if (print_packet_info) {
2694 if (!write_preamble(cf)) {
2696 show_print_file_io_error(err);
2703 if (pdh && out_file_name_res) {
2704 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2705 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2706 wtap_file_type_short_string(out_file_type));
2710 /* Do we have any tap listeners with filters? */
2711 filtering_tap_listeners = have_filtering_tap_listeners();
2713 /* Get the union of the flags for all tap listeners. */
2714 tap_flags = union_of_tap_listener_flags();
2716 if (perform_two_pass_analysis) {
2719 int old_max_packet_count = max_packet_count;
2721 /* Allocate a frame_data_sequence for all the frames. */
2722 cf->frames = new_frame_data_sequence();
2724 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2725 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2726 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2727 /* Stop reading if we have the maximum number of packets;
2728 * When the -c option has not been used, max_packet_count
2729 * starts at 0, which practically means, never stop reading.
2730 * (unless we roll over max_packet_count ?)
2732 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2733 err = 0; /* This is not an error */
2739 /* Close the sequential I/O side, to free up memory it requires. */
2740 wtap_sequential_close(cf->wth);
2742 /* Allow the protocol dissectors to free up memory that they
2743 * don't need after the sequential run-through of the packets. */
2744 postseq_cleanup_all_protocols();
2746 max_packet_count = old_max_packet_count;
2748 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2749 fdata = frame_data_sequence_find(cf->frames, framenum);
2750 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2751 cf->pd, fdata->cap_len, &err, &err_info)) {
2752 if (process_packet_second_pass(cf, fdata,
2753 &cf->pseudo_header, cf->pd,
2754 filtering_tap_listeners, tap_flags)) {
2755 /* Either there's no read filtering or this packet passed the
2756 filter, so, if we're writing to a capture file, write
2759 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2760 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2762 /* Error writing to a capture file */
2763 show_capture_file_io_error(save_file, err, FALSE);
2764 wtap_dump_close(pdh, &err);
2768 /* Stop reading if we have the maximum number of packets;
2769 * When the -c option has not been used, max_packet_count
2770 * starts at 0, which practically means, never stop reading.
2771 * (unless we roll over max_packet_count ?)
2773 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2774 err = 0; /* This is not an error */
2782 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2783 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2784 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2785 filtering_tap_listeners, tap_flags)) {
2786 /* Either there's no read filtering or this packet passed the
2787 filter, so, if we're writing to a capture file, write
2790 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2791 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2793 /* Error writing to a capture file */
2794 show_capture_file_io_error(save_file, err, FALSE);
2795 wtap_dump_close(pdh, &err);
2799 /* Stop reading if we have the maximum number of packets;
2800 * When the -c option has not been used, max_packet_count
2801 * starts at 0, which practically means, never stop reading.
2802 * (unless we roll over max_packet_count ?)
2804 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2805 err = 0; /* This is not an error */
2814 * Print a message noting that the read failed somewhere along the line.
2816 * If we're printing packet data, and the standard output and error are
2817 * going to the same place, flush the standard output, so everything
2818 * buffered up is written, and then print a newline to the standard error
2819 * before printing the error message, to separate it from the packet
2820 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2821 * the _fstat() documentation at Microsoft doesn't indicate whether
2822 * st_ino is even supported.)
2825 if (print_packet_info) {
2826 struct stat stat_stdout, stat_stderr;
2828 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2829 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2830 stat_stdout.st_ino == stat_stderr.st_ino) {
2832 fprintf(stderr, "\n");
2839 case WTAP_ERR_UNSUPPORTED_ENCAP:
2840 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2841 cf->filename, err_info);
2845 case WTAP_ERR_CANT_READ:
2846 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2850 case WTAP_ERR_SHORT_READ:
2851 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2855 case WTAP_ERR_BAD_RECORD:
2856 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2857 cf->filename, err_info);
2861 case WTAP_ERR_DECOMPRESS:
2862 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2863 "(%s)", cf->filename, err_info);
2867 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2868 cf->filename, wtap_strerror(err));
2871 if (save_file != NULL) {
2872 /* Now close the capture file. */
2873 if (!wtap_dump_close(pdh, &err))
2874 show_capture_file_io_error(save_file, err, TRUE);
2877 if (save_file != NULL) {
2878 /* Now close the capture file. */
2879 if (!wtap_dump_close(pdh, &err))
2880 show_capture_file_io_error(save_file, err, TRUE);
2882 if (print_packet_info) {
2883 if (!write_finale()) {
2885 show_print_file_io_error(err);
2892 wtap_close(cf->wth);
2895 g_free(save_file_string);
2901 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2902 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2903 gboolean filtering_tap_listeners, guint tap_flags)
2906 gboolean create_proto_tree;
2911 /* Count this packet. */
2914 /* If we're not running a display filter and we're not printing any
2915 packet information, we don't need to do a dissection. This means
2916 that all packets can be marked as 'passed'. */
2919 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2921 /* If we're going to print packet information, or we're going to
2922 run a read filter, or we're going to process taps, set up to
2923 do a dissection and do so. */
2924 if (do_dissection) {
2925 if (print_packet_info && gbl_resolv_flags)
2926 /* Grab any resolved addresses */
2927 host_name_lookup_process(NULL);
2929 if (cf->rfcode || verbose || filtering_tap_listeners ||
2930 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2931 create_proto_tree = TRUE;
2933 create_proto_tree = FALSE;
2935 /* The protocol tree will be "visible", i.e., printed, only if we're
2936 printing packet details, which is true if we're printing stuff
2937 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2939 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2941 /* If we're running a read filter, prime the epan_dissect_t with that
2944 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2946 col_custom_prime_edt(&edt, &cf->cinfo);
2948 tap_queue_init(&edt);
2950 /* We only need the columns if either
2952 1) some tap needs the columns
2956 2) we're printing packet info but we're *not* verbose; in verbose
2957 mode, we print the protocol tree, not the protocol summary. */
2958 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2963 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2964 &first_ts, &prev_dis_ts, &prev_cap_ts);
2966 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2968 tap_push_tapped_queue(&edt);
2970 /* Run the read filter if we have one. */
2972 passed = dfilter_apply_edt(cf->rfcode, &edt);
2976 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2978 /* Process this packet. */
2979 if (print_packet_info) {
2980 /* We're printing packet information; print the information for
2983 print_packet(cf, &edt);
2985 print_packet(cf, NULL);
2987 /* The ANSI C standard does not appear to *require* that a line-buffered
2988 stream be flushed to the host environment whenever a newline is
2989 written, it just says that, on such a stream, characters "are
2990 intended to be transmitted to or from the host environment as a
2991 block when a new-line character is encountered".
2993 The Visual C++ 6.0 C implementation doesn't do what is intended;
2994 even if you set a stream to be line-buffered, it still doesn't
2995 flush the buffer at the end of every line.
2997 So, if the "-l" flag was specified, we flush the standard output
2998 at the end of a packet. This will do the right thing if we're
2999 printing packet summary lines, and, as we print the entire protocol
3000 tree for a single packet without waiting for anything to happen,
3001 it should be as good as line-buffered mode if we're printing
3002 protocol trees. (The whole reason for the "-l" flag in either
3003 tcpdump or TShark is to allow the output of a live capture to
3004 be piped to a program or script and to have that script see the
3005 information for the packet as soon as it's printed, rather than
3006 having to wait until a standard I/O buffer fills up. */
3010 if (ferror(stdout)) {
3011 show_print_file_io_error(errno);
3017 if (do_dissection) {
3018 epan_dissect_cleanup(&edt);
3019 frame_data_cleanup(&fdata);
3025 write_preamble(capture_file *cf)
3027 switch (output_action) {
3030 return print_preamble(print_stream, cf ? cf->filename : NULL);
3034 write_pdml_preamble(stdout, cf->filename);
3036 write_psml_preamble(stdout);
3037 return !ferror(stdout);
3040 write_fields_preamble(output_fields, stdout);
3041 return !ferror(stdout);
3044 g_assert_not_reached();
3050 get_line_buf(size_t len)
3052 static char *line_bufp = NULL;
3053 static size_t line_buf_len = 256;
3054 size_t new_line_buf_len;
3056 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3057 new_line_buf_len *= 2)
3059 if (line_bufp == NULL) {
3060 line_buf_len = new_line_buf_len;
3061 line_bufp = g_malloc(line_buf_len + 1);
3063 if (new_line_buf_len > line_buf_len) {
3064 line_buf_len = new_line_buf_len;
3065 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3072 print_columns(capture_file *cf)
3079 line_bufp = get_line_buf(256);
3082 for (i = 0; i < cf->cinfo.num_cols; i++) {
3083 /* Skip columns not marked as visible. */
3084 if (!get_column_visible(i))
3086 switch (cf->cinfo.col_fmt[i]) {
3090 * Don't print this if we're doing a live capture from a network
3091 * interface - if we're doing a live capture, you won't be
3092 * able to look at the capture in the future (it's not being
3093 * saved anywhere), so the frame numbers are unlikely to be
3096 * (XXX - it might be nice to be able to save and print at
3097 * the same time, sort of like an "Update list of packets
3098 * in real time" capture in Wireshark.)
3100 if (global_capture_opts.ifaces->len > 0)
3103 column_len = strlen(cf->cinfo.col_data[i]);
3106 line_bufp = get_line_buf(buf_offset + column_len);
3107 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3113 case COL_ABS_DATE_TIME:
3115 case COL_UTC_DATE_TIME: /* XXX - wider */
3116 column_len = strlen(cf->cinfo.col_data[i]);
3117 if (column_len < 10)
3119 line_bufp = get_line_buf(buf_offset + column_len);
3120 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3126 case COL_DEF_DL_SRC:
3127 case COL_RES_DL_SRC:
3128 case COL_UNRES_DL_SRC:
3129 case COL_DEF_NET_SRC:
3130 case COL_RES_NET_SRC:
3131 case COL_UNRES_NET_SRC:
3132 column_len = strlen(cf->cinfo.col_data[i]);
3133 if (column_len < 12)
3135 line_bufp = get_line_buf(buf_offset + column_len);
3136 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3142 case COL_DEF_DL_DST:
3143 case COL_RES_DL_DST:
3144 case COL_UNRES_DL_DST:
3145 case COL_DEF_NET_DST:
3146 case COL_RES_NET_DST:
3147 case COL_UNRES_NET_DST:
3148 column_len = strlen(cf->cinfo.col_data[i]);
3149 if (column_len < 12)
3151 line_bufp = get_line_buf(buf_offset + column_len);
3152 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3156 column_len = strlen(cf->cinfo.col_data[i]);
3157 line_bufp = get_line_buf(buf_offset + column_len);
3158 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3161 buf_offset += column_len;
3162 if (i != cf->cinfo.num_cols - 1) {
3164 * This isn't the last column, so we need to print a
3165 * separator between this column and the next.
3167 * If we printed a network source and are printing a
3168 * network destination of the same type next, separate
3169 * them with " -> "; if we printed a network destination
3170 * and are printing a network source of the same type
3171 * next, separate them with " <- "; otherwise separate them
3174 * We add enough space to the buffer for " <- " or " -> ",
3175 * even if we're only adding " ".
3177 line_bufp = get_line_buf(buf_offset + 4);
3178 switch (cf->cinfo.col_fmt[i]) {
3183 switch (cf->cinfo.col_fmt[i + 1]) {
3188 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3193 g_strlcat(line_bufp + buf_offset, " ", 5);
3199 case COL_DEF_DL_SRC:
3200 case COL_RES_DL_SRC:
3201 case COL_UNRES_DL_SRC:
3202 switch (cf->cinfo.col_fmt[i + 1]) {
3204 case COL_DEF_DL_DST:
3205 case COL_RES_DL_DST:
3206 case COL_UNRES_DL_DST:
3207 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3212 g_strlcat(line_bufp + buf_offset, " ", 5);
3218 case COL_DEF_NET_SRC:
3219 case COL_RES_NET_SRC:
3220 case COL_UNRES_NET_SRC:
3221 switch (cf->cinfo.col_fmt[i + 1]) {
3223 case COL_DEF_NET_DST:
3224 case COL_RES_NET_DST:
3225 case COL_UNRES_NET_DST:
3226 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3231 g_strlcat(line_bufp + buf_offset, " ", 5);
3240 switch (cf->cinfo.col_fmt[i + 1]) {
3245 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3250 g_strlcat(line_bufp + buf_offset, " ", 5);
3256 case COL_DEF_DL_DST:
3257 case COL_RES_DL_DST:
3258 case COL_UNRES_DL_DST:
3259 switch (cf->cinfo.col_fmt[i + 1]) {
3261 case COL_DEF_DL_SRC:
3262 case COL_RES_DL_SRC:
3263 case COL_UNRES_DL_SRC:
3264 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3269 g_strlcat(line_bufp + buf_offset, " ", 5);
3275 case COL_DEF_NET_DST:
3276 case COL_RES_NET_DST:
3277 case COL_UNRES_NET_DST:
3278 switch (cf->cinfo.col_fmt[i + 1]) {
3280 case COL_DEF_NET_SRC:
3281 case COL_RES_NET_SRC:
3282 case COL_UNRES_NET_SRC:
3283 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3288 g_strlcat(line_bufp + buf_offset, " ", 5);
3295 g_strlcat(line_bufp + buf_offset, " ", 5);
3301 return print_line(print_stream, 0, line_bufp);
3305 print_packet(capture_file *cf, epan_dissect_t *edt)
3307 print_args_t print_args;
3310 /* Print the information in the protocol tree. */
3311 switch (output_action) {
3314 print_args.to_file = TRUE;
3315 print_args.format = print_format;
3316 print_args.print_summary = !verbose;
3317 print_args.print_hex = verbose && print_hex;
3318 print_args.print_formfeed = FALSE;
3319 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3321 /* init the packet range */
3322 packet_range_init(&print_args.range);
3324 if (!proto_tree_print(&print_args, edt, print_stream))
3327 /* "print_hex_data()" will put out a leading blank line, as well
3328 as a trailing one; print one here, to separate the packets,
3329 only if "print_hex_data()" won't be called. */
3330 if (!print_line(print_stream, 0, ""))
3336 proto_tree_write_pdml(edt, stdout);
3338 return !ferror(stdout);
3340 proto_tree_write_fields(output_fields, edt, stdout);
3342 return !ferror(stdout);
3345 /* Just fill in the columns. */
3346 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3348 /* Now print them. */
3349 switch (output_action) {
3352 if (!print_columns(cf))
3357 proto_tree_write_psml(edt, stdout);
3358 return !ferror(stdout);
3359 case WRITE_FIELDS: /*No non-verbose "fields" format */
3360 g_assert_not_reached();
3365 if (!print_hex_data(print_stream, edt))
3367 if (!print_line(print_stream, 0, ""))
3376 switch (output_action) {
3379 return print_finale(print_stream);
3383 write_pdml_finale(stdout);
3385 write_psml_finale(stdout);
3386 return !ferror(stdout);
3389 write_fields_finale(output_fields, stdout);
3390 return !ferror(stdout);
3393 g_assert_not_reached();
3399 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3403 char err_msg[2048+1];
3405 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3409 /* The open succeeded. Fill in the information for this file. */
3411 /* Cleanup all data structures used for dissection. */
3412 cleanup_dissection();
3413 /* Initialize all data structures used for dissection. */
3417 cf->f_datalen = 0; /* not used, but set it anyway */
3419 /* Set the file name because we need it to set the follow stream filter.
3420 XXX - is that still true? We need it for other reasons, though,
3422 cf->filename = g_strdup(fname);
3424 /* Indicate whether it's a permanent or temporary file. */
3425 cf->is_tempfile = is_tempfile;
3427 /* If it's a temporary capture buffer file, mark it as not saved. */
3428 cf->user_saved = !is_tempfile;
3430 cf->cd_t = wtap_file_type(cf->wth);
3432 cf->drops_known = FALSE;
3434 cf->snap = wtap_snapshot_length(cf->wth);
3435 if (cf->snap == 0) {
3436 /* Snapshot length not known. */
3437 cf->has_snap = FALSE;
3438 cf->snap = WTAP_MAX_PACKET_SIZE;
3440 cf->has_snap = TRUE;
3441 nstime_set_zero(&cf->elapsed_time);
3442 nstime_set_unset(&first_ts);
3443 nstime_set_unset(&prev_dis_ts);
3444 nstime_set_unset(&prev_cap_ts);
3446 cf->state = FILE_READ_IN_PROGRESS;
3448 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3449 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3454 g_snprintf(err_msg, sizeof err_msg,
3455 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3456 cmdarg_err("%s", err_msg);
3461 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3463 char *save_file_string;
3465 save_file_string = output_file_description(fname);
3470 cmdarg_err("Not all the packets could be written to the %s because there is "
3471 "no space left on the file system.",
3477 cmdarg_err("Not all the packets could be written to the %s because you are "
3478 "too close to, or over your disk quota.",
3483 case WTAP_ERR_CANT_CLOSE:
3484 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3488 case WTAP_ERR_SHORT_WRITE:
3489 cmdarg_err("Not all the packets could be written to the %s.",
3495 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3496 wtap_strerror(err));
3498 cmdarg_err("An error occurred while writing to the %s: %s.",
3499 save_file_string, wtap_strerror(err));
3503 g_free(save_file_string);
3507 show_print_file_io_error(int err)
3512 cmdarg_err("Not all the packets could be printed because there is "
3513 "no space left on the file system.");
3518 cmdarg_err("Not all the packets could be printed because you are "
3519 "too close to, or over your disk quota.");
3524 cmdarg_err("An error occurred while printing packets: %s.",
3531 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3535 static char errmsg_errno[1024+1];
3538 /* Wiretap error. */
3541 case WTAP_ERR_NOT_REGULAR_FILE:
3542 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3545 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3546 /* Seen only when opening a capture file for reading. */
3547 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3550 case WTAP_ERR_UNSUPPORTED:
3551 /* Seen only when opening a capture file for reading. */
3552 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3553 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3556 errmsg = errmsg_errno;
3559 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3560 /* Seen only when opening a capture file for writing. */
3561 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3562 "The file \"%%s\" is a pipe, and %s capture files can't be "
3563 "written to a pipe.", wtap_file_type_string(file_type));
3564 errmsg = errmsg_errno;
3567 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3568 /* Seen only when opening a capture file for writing. */
3569 errmsg = "TShark doesn't support writing capture files in that format.";
3572 case WTAP_ERR_UNSUPPORTED_ENCAP:
3574 errmsg = "TShark can't save this capture in that format.";
3576 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3577 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3580 errmsg = errmsg_errno;
3584 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3586 errmsg = "TShark can't save this capture in that format.";
3588 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3591 case WTAP_ERR_BAD_RECORD:
3592 /* Seen only when opening a capture file for reading. */
3593 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3594 "The file \"%%s\" appears to be damaged or corrupt.\n"
3597 errmsg = errmsg_errno;
3600 case WTAP_ERR_CANT_OPEN:
3602 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3604 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3607 case WTAP_ERR_SHORT_READ:
3608 errmsg = "The file \"%s\" appears to have been cut short"
3609 " in the middle of a packet or other data.";
3612 case WTAP_ERR_SHORT_WRITE:
3613 errmsg = "A full header couldn't be written to the file \"%s\".";
3616 case WTAP_ERR_DECOMPRESS:
3617 /* Seen only when opening a capture file for reading. */
3618 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3619 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3622 errmsg = errmsg_errno;
3626 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3627 "The file \"%%s\" could not be %s: %s.",
3628 for_writing ? "created" : "opened",
3629 wtap_strerror(err));
3630 errmsg = errmsg_errno;
3634 errmsg = file_open_error_message(err, for_writing);
3639 * Open/create errors are reported with an console message in TShark.
3642 open_failure_message(const char *filename, int err, gboolean for_writing)
3644 fprintf(stderr, "tshark: ");
3645 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3646 fprintf(stderr, "\n");
3651 * General errors are reported with an console message in TShark.
3654 failure_message(const char *msg_format, va_list ap)
3656 fprintf(stderr, "tshark: ");
3657 vfprintf(stderr, msg_format, ap);
3658 fprintf(stderr, "\n");
3662 * Read errors are reported with an console message in TShark.
3665 read_failure_message(const char *filename, int err)
3667 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3668 filename, g_strerror(err));
3672 * Write errors are reported with an console message in TShark.
3675 write_failure_message(const char *filename, int err)
3677 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3678 filename, g_strerror(err));
3682 * Print to the standard error. This is a command-line tool, so there's
3683 * no need to pop up a console.
3686 vfprintf_stderr(const char *fmt, va_list ap)
3688 vfprintf(stderr, fmt, ap);
3692 fprintf_stderr(const char *fmt, ...)
3697 vfprintf_stderr(fmt, ap);
3702 * Report an error in command-line arguments.
3705 cmdarg_err(const char *fmt, ...)
3710 failure_message(fmt, ap);
3715 * Report additional information for an error in command-line arguments.
3718 cmdarg_err_cont(const char *fmt, ...)
3723 vfprintf(stderr, fmt, ap);
3724 fprintf(stderr, "\n");