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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
52 #ifdef HAVE_SYS_STAT_H
53 # include <sys/stat.h>
57 #include "wsutil/wsgetopt.h"
61 #include <epan/epan-int.h>
62 #include <epan/epan.h>
63 #include <epan/filesystem.h>
64 #include <wsutil/crash_info.h>
65 #include <wsutil/privileges.h>
66 #include <wsutil/file_util.h>
69 #include <epan/timestamp.h>
70 #include <epan/packet.h>
72 #include "frame_tvbuff.h"
73 #include <epan/disabled_protos.h>
74 #include <epan/prefs.h>
75 #include <epan/column.h>
76 #include <epan/print.h>
77 #include <epan/addr_resolv.h>
79 #include "clopts_common.h"
80 #include "cmdarg_err.h"
81 #include "version_info.h"
82 #include <epan/plugins.h>
84 #include <epan/epan_dissect.h>
86 #include <epan/stat_cmd_args.h>
87 #include <epan/timestamp.h>
88 #include <epan/ex-opt.h>
90 #include "capture_opts.h"
93 #include "capture_ui_utils.h"
94 #include "capture_ifinfo.h"
95 #include "capture-pcap-util.h"
97 #include "capture-wpcap.h"
98 #include <wsutil/unicode-utils.h>
100 #include "capture_session.h"
101 #include "capture_sync.h"
102 #include "capture_opts.h"
103 #endif /* HAVE_LIBPCAP */
105 #include <epan/funnel.h>
108 * This is the template for the decode as option; it is shared between the
109 * various functions that output the usage for this parameter.
111 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
113 static guint32 cum_bytes;
114 static const frame_data *ref;
115 static frame_data ref_frame;
116 static frame_data *prev_dis;
117 static frame_data prev_dis_frame;
118 static frame_data *prev_cap;
119 static frame_data prev_cap_frame;
121 static const char* prev_display_dissector_name = NULL;
123 static gboolean perform_two_pass_analysis;
126 * The way the packet decode is to be written.
129 WRITE_TEXT, /* summary or detail text */
130 WRITE_XML, /* PDML or PSML */
131 WRITE_FIELDS /* User defined list of fields */
132 /* Add CSV and the like here */
135 static output_action_e output_action;
136 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
137 static gboolean print_packet_info; /* TRUE if we're to print packet information */
138 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
139 static gboolean print_details; /* TRUE if we're to print packet details information */
140 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
141 static gboolean line_buffered;
142 static gboolean really_quiet = FALSE;
144 static print_format_e print_format = PR_FMT_TEXT;
145 static print_stream_t *print_stream;
147 static output_fields_t* output_fields = NULL;
149 /* The line separator used between packets, changeable via the -S option */
150 static const char *separator = "";
154 * TRUE if we're to print packet counts to keep track of captured packets.
156 static gboolean print_packet_counts;
158 static capture_options global_capture_opts;
159 static capture_session global_capture_session;
162 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
163 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
166 static gboolean capture(void);
167 static void report_counts(void);
169 static BOOL WINAPI capture_cleanup(DWORD);
171 static void capture_cleanup(int);
173 static void report_counts_siginfo(int);
176 #endif /* HAVE_LIBPCAP */
178 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
179 static gboolean process_packet(capture_file *cf, gint64 offset,
180 struct wtap_pkthdr *whdr, const guchar *pd,
181 gboolean filtering_tap_listeners, guint tap_flags);
182 static void show_capture_file_io_error(const char *, int, gboolean);
183 static void show_print_file_io_error(int err);
184 static gboolean write_preamble(capture_file *cf);
185 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
186 static gboolean write_finale(void);
187 static const char *cf_open_error_message(int err, gchar *err_info,
188 gboolean for_writing, int file_type);
190 static void open_failure_message(const char *filename, int err,
191 gboolean for_writing);
192 static void failure_message(const char *msg_format, va_list ap);
193 static void read_failure_message(const char *filename, int err);
194 static void write_failure_message(const char *filename, int err);
199 const char *sstr; /* The short string */
200 const char *lstr; /* The long string */
204 string_compare(gconstpointer a, gconstpointer b)
206 return strcmp(((const struct string_elem *)a)->sstr,
207 ((const struct string_elem *)b)->sstr);
211 string_elem_print(gpointer data, gpointer not_used _U_)
213 fprintf(stderr, " %s - %s\n",
214 ((struct string_elem *)data)->sstr,
215 ((struct string_elem *)data)->lstr);
219 list_capture_types(void) {
221 struct string_elem *captypes;
224 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
226 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
227 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
228 if (wtap_dump_can_open(i)) {
229 captypes[i].sstr = wtap_file_type_short_string(i);
230 captypes[i].lstr = wtap_file_type_string(i);
231 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
234 g_slist_foreach(list, string_elem_print, NULL);
240 print_usage(gboolean print_ver)
247 "TShark " VERSION "%s\n"
248 "Dump and analyze network traffic.\n"
249 "See http://www.wireshark.org for more information.\n"
252 wireshark_svnversion, get_copyright_info());
256 fprintf(output, "\n");
257 fprintf(output, "Usage: tshark [options] ...\n");
258 fprintf(output, "\n");
261 fprintf(output, "Capture interface:\n");
262 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
263 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
264 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
265 fprintf(output, " -p don't capture in promiscuous mode\n");
266 #ifdef HAVE_PCAP_CREATE
267 fprintf(output, " -I capture in monitor mode, if available\n");
269 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
270 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
272 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
273 fprintf(output, " -D print list of interfaces and exit\n");
274 fprintf(output, " -L print list of link-layer types of iface and exit\n");
275 fprintf(output, "\n");
276 fprintf(output, "Capture stop conditions:\n");
277 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
278 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
279 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
280 fprintf(output, " files:NUM - stop after NUM files\n");
281 /*fprintf(output, "\n");*/
282 fprintf(output, "Capture output:\n");
283 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
284 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
285 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
286 #endif /* HAVE_LIBPCAP */
287 #ifdef HAVE_PCAP_REMOTE
288 fprintf(output, "RPCAP options:\n");
289 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
291 /*fprintf(output, "\n");*/
292 fprintf(output, "Input file:\n");
293 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
295 fprintf(output, "\n");
296 fprintf(output, "Processing:\n");
297 fprintf(output, " -2 perform a two-pass analysis\n");
298 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
299 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
300 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
301 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
302 fprintf(output, " -d %s ...\n", decode_as_arg_template);
303 fprintf(output, " \"Decode As\", see the man page for details\n");
304 fprintf(output, " Example: tcp.port==8888,http\n");
305 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
306 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
308 /*fprintf(output, "\n");*/
309 fprintf(output, "Output:\n");
310 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
311 fprintf(output, " (or to the standard output for \"-\")\n");
312 fprintf(output, " -C <config profile> start with specified configuration profile\n");
313 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
314 fprintf(output, " an empty \"-F\" option will list the file types\n");
315 fprintf(output, " -V add output of packet tree (Packet Details)\n");
316 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
317 fprintf(output, " separated\n");
318 fprintf(output, " -P print packet summary even when writing to a file\n");
319 fprintf(output, " -S <separator> the line separator to print between packets\n");
320 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
321 fprintf(output, " -T pdml|ps|psml|text|fields\n");
322 fprintf(output, " format of text output (def: text)\n");
323 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
324 fprintf(output, " this option can be repeated to print multiple fields\n");
325 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
326 fprintf(output, " header=y|n switch headers on and off\n");
327 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
328 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
329 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
330 fprintf(output, " aggregator\n");
331 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
332 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
333 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
334 fprintf(output, " -l flush standard output after each packet\n");
335 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
336 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
337 fprintf(output, " -g enable group read access on the output file(s)\n");
338 fprintf(output, " -W n Save extra information in the file, if supported.\n");
339 fprintf(output, " n = write network address resolution information\n");
340 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
341 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
342 fprintf(output, " --capture-comment <comment>\n");
343 fprintf(output, " add a capture comment to the newly created\n");
344 fprintf(output, " output file (only for pcapng)\n");
346 fprintf(output, "\n");
347 fprintf(output, "Miscellaneous:\n");
348 fprintf(output, " -h display this help and exit\n");
349 fprintf(output, " -v display version info and exit\n");
350 fprintf(output, " -o <name>:<value> ... override preference setting\n");
351 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
352 fprintf(output, " -G [report] dump one of several available reports and exit\n");
353 fprintf(output, " default report=\"fields\"\n");
354 fprintf(output, " use \"-G ?\" for more help\n");
358 glossary_option_help(void)
364 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
366 fprintf(output, "\n");
367 fprintf(output, "Usage: tshark -G [report]\n");
368 fprintf(output, "\n");
369 fprintf(output, "Glossary table reports:\n");
370 fprintf(output, " -G fields dump fields glossary and exit\n");
371 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
372 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
373 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
374 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
375 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
376 fprintf(output, "\n");
377 fprintf(output, "Preference reports:\n");
378 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
379 fprintf(output, " -G currentprefs dump current preferences and exit\n");
380 fprintf(output, "\n");
384 * For a dissector table, print on the stream described by output,
385 * its short name (which is what's used in the "-d" option) and its
389 display_dissector_table_names(const char *table_name, const char *ui_name,
392 if ((prev_display_dissector_name == NULL) ||
393 (strcmp(prev_display_dissector_name, table_name) != 0)) {
394 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
395 prev_display_dissector_name = table_name;
400 * For a dissector handle, print on the stream described by output,
401 * the filter name (which is what's used in the "-d" option) and the full
402 * name for the protocol that corresponds to this handle.
405 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
408 const gchar *proto_filter_name;
409 const gchar *proto_ui_name;
411 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
413 if (proto_id != -1) {
414 proto_filter_name = proto_get_protocol_filter_name(proto_id);
415 proto_ui_name = proto_get_protocol_name(proto_id);
416 g_assert(proto_filter_name != NULL);
417 g_assert(proto_ui_name != NULL);
419 if ((prev_display_dissector_name == NULL) ||
420 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
421 fprintf((FILE *)output, "\t%s (%s)\n",
424 prev_display_dissector_name = proto_filter_name;
430 * The protocol_name_search structure is used by find_protocol_name_func()
431 * to pass parameters and store results
433 struct protocol_name_search{
434 gchar *searched_name; /* Protocol filter name we are looking for */
435 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
436 guint nb_match; /* How many dissectors matched searched_name */
438 typedef struct protocol_name_search *protocol_name_search_t;
441 * This function parses all dissectors associated with a table to find the
442 * one whose protocol has the specified filter name. It is called
443 * as a reference function in a call to dissector_table_foreach_handle.
444 * The name we are looking for, as well as the results, are stored in the
445 * protocol_name_search struct pointed to by user_data.
446 * If called using dissector_table_foreach_handle, we actually parse the
447 * whole list of dissectors.
450 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
454 const gchar *protocol_filter_name;
455 protocol_name_search_t search_info;
459 search_info = (protocol_name_search_t)user_data;
461 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
462 if (proto_id != -1) {
463 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
464 g_assert(protocol_filter_name != NULL);
465 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
467 if (search_info->nb_match == 0) {
468 /* Record this handle only if this is the first match */
469 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
471 search_info->nb_match++;
477 * Allow dissector key names to be sorted alphabetically
481 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
483 return strcmp((const char*)dissector_a, (const char*)dissector_b);
487 * Print all layer type names supported.
488 * We send the output to the stream described by the handle output.
492 fprint_all_layer_types(FILE *output)
495 prev_display_dissector_name = NULL;
496 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
500 * Print all protocol names supported for a specific layer type.
501 * table_name contains the layer type name in which the search is performed.
502 * We send the output to the stream described by the handle output.
506 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
509 prev_display_dissector_name = NULL;
510 dissector_table_foreach_handle(table_name,
511 display_dissector_names,
516 * The function below parses the command-line parameters for the decode as
517 * feature (a string pointer by cl_param).
518 * It checks the format of the command-line, searches for a matching table
519 * and dissector. If a table/dissector match is not found, we display a
520 * summary of the available tables/dissectors (on stderr) and return FALSE.
521 * If everything is fine, we get the "Decode as" preference activated,
522 * then we return TRUE.
525 add_decode_as(const gchar *cl_param)
528 guint32 selector, selector2;
529 gchar *decoded_param;
530 gchar *remaining_param;
532 gchar *dissector_str;
533 dissector_handle_t dissector_matching;
534 dissector_table_t table_matching;
535 ftenum_t dissector_table_selector_type;
536 struct protocol_name_search user_protocol_name;
540 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
543 decoded_param = g_strdup(cl_param);
544 g_assert(decoded_param);
547 /* The lines below will parse this string (modifying it) to extract all
548 necessary information. Note that decoded_param is still needed since
549 strings are not copied - we just save pointers. */
551 /* This section extracts a layer type (table_name) from decoded_param */
552 table_name = decoded_param; /* Layer type string starts from beginning */
554 remaining_param = strchr(table_name, '=');
555 if (remaining_param == NULL) {
556 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
557 /* If the argument does not follow the template, carry on anyway to check
558 if the table name is at least correct. If remaining_param is NULL,
559 we'll exit anyway further down */
562 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
565 /* Remove leading and trailing spaces from the table name */
566 while ( table_name[0] == ' ' )
568 while ( table_name[strlen(table_name) - 1] == ' ' )
569 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
571 /* The following part searches a table matching with the layer type specified */
572 table_matching = NULL;
574 /* Look for the requested table */
575 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
576 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
579 table_matching = find_dissector_table(table_name);
580 if (!table_matching) {
581 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
585 if (!table_matching) {
586 /* Display a list of supported layer types to help the user, if the
587 specified layer type was not found */
588 cmdarg_err("Valid layer types are:");
589 fprint_all_layer_types(stderr);
591 if (remaining_param == NULL || !table_matching) {
592 /* Exit if the layer type was not found, or if no '=' separator was found
594 g_free(decoded_param);
598 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
599 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
602 remaining_param++; /* Move to the second '=' */
603 *remaining_param = '\0'; /* Remove the second '=' */
605 remaining_param++; /* Position after the layer type string */
607 /* This section extracts a selector value (selector_str) from decoded_param */
609 selector_str = remaining_param; /* Next part starts with the selector number */
611 remaining_param = strchr(selector_str, ',');
612 if (remaining_param == NULL) {
613 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
614 /* If the argument does not follow the template, carry on anyway to check
615 if the selector value is at least correct. If remaining_param is NULL,
616 we'll exit anyway further down */
619 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
622 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
624 switch (dissector_table_selector_type) {
630 /* The selector for this table is an unsigned number. Parse it as such.
631 There's no need to remove leading and trailing spaces from the
632 selector number string, because sscanf will do that for us. */
633 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
638 if (op != ':' && op != '-') {
639 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
640 g_free(decoded_param);
644 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
645 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
646 g_free(decoded_param);
650 else if (selector2 < selector) {
651 /* We could swap them for the user, but maybe it's better to call
652 * this out as an error in case it's not what was intended? */
653 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
654 g_free(decoded_param);
659 cmdarg_err("Invalid selector number \"%s\"", selector_str);
660 g_free(decoded_param);
667 /* The selector for this table is a string. */
671 /* There are currently no dissector tables with any types other
672 than the ones listed above. */
673 g_assert_not_reached();
676 if (remaining_param == NULL) {
677 /* Exit if no ',' separator was found (see above) */
678 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
679 fprint_all_protocols_for_layer_types(stderr, table_name);
680 g_free(decoded_param);
684 remaining_param++; /* Position after the selector number string */
686 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
688 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
690 /* Remove leading and trailing spaces from the dissector name */
691 while ( dissector_str[0] == ' ' )
693 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
694 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
696 dissector_matching = NULL;
698 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
699 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 */
700 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
703 user_protocol_name.nb_match = 0;
704 user_protocol_name.searched_name = dissector_str;
705 user_protocol_name.matched_handle = NULL;
707 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 */
709 if (user_protocol_name.nb_match != 0) {
710 dissector_matching = user_protocol_name.matched_handle;
711 if (user_protocol_name.nb_match > 1) {
712 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
716 /* OK, check whether the problem is that there isn't any such
717 protocol, or that there is but it's not specified as a protocol
718 that's valid for that dissector table.
719 Note, we don't exit here, but dissector_matching will remain NULL,
721 if (proto_get_id_by_filter_name(dissector_str) == -1) {
722 /* No such protocol */
723 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
725 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
726 dissector_str, table_name);
731 if (!dissector_matching) {
732 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
733 fprint_all_protocols_for_layer_types(stderr, table_name);
734 g_free(decoded_param);
738 /* This is the end of the code that parses the command-line options.
739 All information is now stored in the variables:
743 The above variables that are strings are still pointing to areas within
744 decoded_parm. decoded_parm thus still needs to be kept allocated in
745 until we stop needing these variables
746 decoded_param will be deallocated at each exit point of this function */
749 /* We now have a pointer to the handle for the requested dissector
750 (requested protocol) inside the variable dissector_matching */
751 switch (dissector_table_selector_type) {
757 /* The selector for this table is an unsigned number. */
759 dissector_change_uint(table_name, selector, dissector_matching);
760 } else if (op == ':') {
761 for (i = selector; i < (guint64)selector + selector2; i++) {
762 dissector_change_uint(table_name, (guint32)i, dissector_matching);
764 } else { /* op == '-' */
765 for (i = selector; i <= selector2; i++) {
766 dissector_change_uint(table_name, (guint32)i, dissector_matching);
773 /* The selector for this table is a string. */
774 dissector_change_string(table_name, selector_str, dissector_matching);
778 /* There are currently no dissector tables with any types other
779 than the ones listed above. */
780 g_assert_not_reached();
782 g_free(decoded_param); /* "Decode As" rule has been successfully added */
787 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
788 const gchar *message, gpointer user_data)
790 /* ignore log message, if log_level isn't interesting based
791 upon the console log preferences.
792 If the preferences haven't been loaded loaded yet, display the
795 The default console_log_level preference value is such that only
796 ERROR, CRITICAL and WARNING level messages are processed;
797 MESSAGE, INFO and DEBUG level messages are ignored.
799 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
800 ERROR and CRITICAL level messages so the current code is a behavioral
801 change. The current behavior is the same as in Wireshark.
803 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
804 prefs.console_log_level != 0) {
808 g_log_default_handler(log_domain, log_level, message, user_data);
813 output_file_description(const char *fname)
815 char *save_file_string;
817 /* Get a string that describes what we're writing to */
818 if (strcmp(fname, "-") == 0) {
819 /* We're writing to the standard output */
820 save_file_string = g_strdup("standard output");
822 /* We're writing to a file with the name in save_file */
823 save_file_string = g_strdup_printf("file \"%s\"", fname);
825 return save_file_string;
829 print_current_user(void) {
830 gchar *cur_user, *cur_group;
832 if (started_with_special_privs()) {
833 cur_user = get_cur_username();
834 cur_group = get_cur_groupname();
835 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
836 cur_user, cur_group);
839 if (running_with_special_privs()) {
840 fprintf(stderr, " This could be dangerous.");
842 fprintf(stderr, "\n");
847 check_capture_privs(void) {
850 /* Warn the user if npf.sys isn't loaded. */
851 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
852 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
853 "capturing or\nlisting interfaces.\n");
859 show_version(GString *comp_info_str, GString *runtime_info_str)
861 printf("TShark " VERSION "%s\n"
868 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
869 runtime_info_str->str);
873 main(int argc, char *argv[])
875 GString *comp_info_str;
876 GString *runtime_info_str;
877 char *init_progfile_dir_error;
879 struct option long_options[] = {
880 {(char *)"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
883 gboolean arg_error = FALSE;
889 char *gpf_path, *pf_path;
890 char *gdp_path, *dp_path;
891 int gpf_open_errno, gpf_read_errno;
892 int pf_open_errno, pf_read_errno;
893 int gdp_open_errno, gdp_read_errno;
894 int dp_open_errno, dp_read_errno;
896 volatile int exit_status = 0;
898 gboolean list_link_layer_types = FALSE;
899 gboolean start_capture = FALSE;
904 gboolean capture_option_specified = FALSE;
906 gboolean quiet = FALSE;
907 #ifdef PCAP_NG_DEFAULT
908 volatile int out_file_type = WTAP_FILE_PCAPNG;
910 volatile int out_file_type = WTAP_FILE_PCAP;
912 volatile gboolean out_file_name_res = FALSE;
913 gchar *volatile cf_name = NULL;
914 gchar *rfilter = NULL;
915 gchar *dfilter = NULL;
916 #ifdef HAVE_PCAP_OPEN_DEAD
917 struct bpf_program fcode;
919 dfilter_t *rfcode = NULL;
920 dfilter_t *dfcode = NULL;
925 gchar *output_only = NULL;
927 #ifdef HAVE_PCAP_REMOTE
928 #define OPTSTRING_A "A:"
930 #define OPTSTRING_A ""
933 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
934 #define OPTSTRING_B "B:"
936 #define OPTSTRING_B ""
937 #endif /* _WIN32 or HAVE_PCAP_CREATE */
938 #else /* HAVE_LIBPCAP */
939 #define OPTSTRING_B ""
940 #endif /* HAVE_LIBPCAP */
942 #ifdef HAVE_PCAP_CREATE
943 #define OPTSTRING_I "I"
945 #define OPTSTRING_I ""
948 /* the leading - ensures that getopt() does not permute the argv[] entries
949 we have to make sure that the first getopt() preserves the content of argv[]
950 for the subsequent getopt_long() call */
951 #define OPTSTRING "-2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:Y:z:"
953 static const char optstring[] = OPTSTRING;
955 /* Assemble the compile-time version information string */
956 comp_info_str = g_string_new("Compiled ");
957 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
959 /* Assemble the run-time version information string */
960 runtime_info_str = g_string_new("Running ");
961 get_runtime_version_info(runtime_info_str, NULL);
963 /* Add it to the information to be reported on a crash. */
964 ws_add_crash_info("TShark " VERSION "%s\n"
969 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
972 arg_list_utf_16to8(argc, argv);
973 create_app_running_mutex();
974 #if !GLIB_CHECK_VERSION(2,31,0)
980 * Get credential information for later use.
982 init_process_policies();
985 * Attempt to get the pathname of the executable file.
987 init_progfile_dir_error = init_progfile_dir(argv[0], main);
988 if (init_progfile_dir_error != NULL) {
989 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
990 init_progfile_dir_error);
994 * In order to have the -X opts assigned before the wslua machine starts
995 * we need to call getopts before epan_init() gets called.
998 optind_initial = optind;
1000 while ((opt = getopt(argc, argv, optstring)) != -1) {
1002 case 'C': /* Configuration Profile */
1003 if (profile_exists (optarg, FALSE)) {
1004 set_profile_name (optarg);
1006 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1010 case 'P': /* Print packet summary info even when writing to a file */
1011 print_packet_info = TRUE;
1012 print_summary = TRUE;
1014 case 'O': /* Only output these protocols */
1015 output_only = g_strdup(optarg);
1017 case 'V': /* Verbose */
1018 print_details = TRUE;
1019 print_packet_info = TRUE;
1021 case 'x': /* Print packet data in hex (and ASCII) */
1023 /* The user asked for hex output, so let's ensure they get it,
1024 * even if they're writing to a file.
1026 print_packet_info = TRUE;
1037 * Print packet summary information is the default, unless either -V or -x
1038 * were specified and -P was not. Note that this is new behavior, which
1039 * allows for the possibility of printing only hex/ascii output without
1040 * necessarily requiring that either the summary or details be printed too.
1042 if (print_summary == -1)
1043 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1045 optind = optind_initial;
1050 /** Send All g_log messages to our own handler **/
1054 G_LOG_LEVEL_CRITICAL|
1055 G_LOG_LEVEL_WARNING|
1056 G_LOG_LEVEL_MESSAGE|
1059 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1061 g_log_set_handler(NULL,
1062 (GLogLevelFlags)log_flags,
1063 tshark_log_handler, NULL /* user_data */);
1064 g_log_set_handler(LOG_DOMAIN_MAIN,
1065 (GLogLevelFlags)log_flags,
1066 tshark_log_handler, NULL /* user_data */);
1069 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1070 (GLogLevelFlags)log_flags,
1071 tshark_log_handler, NULL /* user_data */);
1072 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1073 (GLogLevelFlags)log_flags,
1074 tshark_log_handler, NULL /* user_data */);
1077 initialize_funnel_ops();
1080 capture_opts_init(&global_capture_opts);
1081 capture_session_init(&global_capture_session, (void *)&cfile);
1084 timestamp_set_type(TS_RELATIVE);
1085 timestamp_set_precision(TS_PREC_AUTO);
1086 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1088 /* Register all dissectors; we must do this before checking for the
1089 "-G" flag, as the "-G" flag dumps information registered by the
1090 dissectors, and we must do it before we read the preferences, in
1091 case any dissectors register preferences. */
1092 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1093 failure_message, open_failure_message, read_failure_message,
1094 write_failure_message);
1096 /* Register all tap listeners; we do this before we parse the arguments,
1097 as the "-z" argument can specify a registered tap. */
1099 /* we register the plugin taps before the other taps because
1100 stats_tree taps plugins will be registered as tap listeners
1101 by stats_tree_stat.c and need to registered before that */
1103 register_all_plugin_tap_listeners();
1105 register_all_tap_listeners();
1107 /* If invoked with the "-G" flag, we dump out information based on
1108 the argument to the "-G" flag; if no argument is specified,
1109 for backwards compatibility we dump out a glossary of display
1112 XXX - we do this here, for now, to support "-G" with no arguments.
1113 If none of our build or other processes uses "-G" with no arguments,
1114 we can just process it with the other arguments. */
1115 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1116 proto_initialize_all_prefixes();
1119 proto_registrar_dump_fields();
1121 if (strcmp(argv[2], "fields") == 0)
1122 proto_registrar_dump_fields();
1123 else if (strcmp(argv[2], "protocols") == 0)
1124 proto_registrar_dump_protocols();
1125 else if (strcmp(argv[2], "values") == 0)
1126 proto_registrar_dump_values();
1127 else if (strcmp(argv[2], "ftypes") == 0)
1128 proto_registrar_dump_ftypes();
1129 else if (strcmp(argv[2], "decodes") == 0)
1130 dissector_dump_decodes();
1131 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1132 dissector_dump_heur_decodes();
1133 else if (strcmp(argv[2], "defaultprefs") == 0)
1135 else if (strcmp(argv[2], "plugins") == 0)
1137 else if (strcmp(argv[2], "?") == 0)
1138 glossary_option_help();
1139 else if (strcmp(argv[2], "-?") == 0)
1140 glossary_option_help();
1141 else if (strcmp(argv[2], "currentprefs") == 0) {
1142 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1143 &pf_open_errno, &pf_read_errno, &pf_path);
1146 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1153 /* Set the C-language locale to the native environment. */
1154 setlocale(LC_ALL, "");
1156 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1157 &pf_open_errno, &pf_read_errno, &pf_path);
1158 if (gpf_path != NULL) {
1159 if (gpf_open_errno != 0) {
1160 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1161 pf_path, g_strerror(gpf_open_errno));
1163 if (gpf_read_errno != 0) {
1164 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1165 pf_path, g_strerror(gpf_read_errno));
1168 if (pf_path != NULL) {
1169 if (pf_open_errno != 0) {
1170 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1171 g_strerror(pf_open_errno));
1173 if (pf_read_errno != 0) {
1174 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1175 pf_path, g_strerror(pf_read_errno));
1181 /* Read the disabled protocols file. */
1182 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1183 &dp_path, &dp_open_errno, &dp_read_errno);
1184 if (gdp_path != NULL) {
1185 if (gdp_open_errno != 0) {
1186 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1187 gdp_path, g_strerror(gdp_open_errno));
1189 if (gdp_read_errno != 0) {
1190 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1191 gdp_path, g_strerror(gdp_read_errno));
1195 if (dp_path != NULL) {
1196 if (dp_open_errno != 0) {
1198 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1199 g_strerror(dp_open_errno));
1201 if (dp_read_errno != 0) {
1203 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1204 g_strerror(dp_read_errno));
1209 check_capture_privs();
1211 cap_file_init(&cfile);
1213 /* Print format defaults to this. */
1214 print_format = PR_FMT_TEXT;
1216 output_fields = output_fields_new();
1218 /* Now get our args */
1219 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1221 case '2': /* Perform two pass analysis */
1222 perform_two_pass_analysis = TRUE;
1224 case 'a': /* autostop criteria */
1225 case 'b': /* Ringbuffer option */
1226 case 'c': /* Capture x packets */
1227 case 'f': /* capture filter */
1228 case 'g': /* enable group read access on file(s) */
1229 case 'i': /* Use interface x */
1230 case 'p': /* Don't capture in promiscuous mode */
1231 #ifdef HAVE_PCAP_REMOTE
1232 case 'A': /* Authentication */
1234 #ifdef HAVE_PCAP_CREATE
1235 case 'I': /* Capture in monitor mode, if available */
1237 case 's': /* Set the snapshot (capture) length */
1238 case 'w': /* Write to capture file x */
1239 case 'y': /* Set the pcap data link type */
1240 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1241 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1242 case 'B': /* Buffer size */
1243 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1245 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1250 capture_option_specified = TRUE;
1255 /* Configuration profile settings were already processed just ignore them this time*/
1257 case 'd': /* Decode as rule */
1258 if (!add_decode_as(optarg))
1261 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1262 case 'K': /* Kerberos keytab file */
1263 read_keytab_file(optarg);
1266 case 'D': /* Print a list of capture devices and exit */
1268 if_list = capture_interface_list(&err, &err_str,NULL);
1269 if (if_list == NULL) {
1271 case CANT_GET_INTERFACE_LIST:
1272 case DONT_HAVE_PCAP:
1273 cmdarg_err("%s", err_str);
1277 case NO_INTERFACES_FOUND:
1278 cmdarg_err("There are no interfaces on which a capture can be done");
1283 capture_opts_print_interfaces(if_list);
1284 free_interface_list(if_list);
1287 capture_option_specified = TRUE;
1293 output_fields_add(output_fields, optarg);
1297 if (!output_fields_set_option(output_fields, optarg)) {
1298 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1299 output_fields_list_options(stderr);
1304 out_file_type = wtap_short_string_to_file_type(optarg);
1305 if (out_file_type < 0) {
1306 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1307 list_capture_types();
1311 case 'W': /* Select extra information to save in our capture file */
1312 /* This is patterned after the -N flag which may not be the best idea. */
1313 if (strchr(optarg, 'n')) {
1314 out_file_name_res = TRUE;
1316 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1320 case 'H': /* Read address to name mappings from a hosts file */
1321 if (! add_hosts_file(optarg))
1323 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1326 out_file_name_res = TRUE;
1329 case 'h': /* Print help and exit */
1333 case 'l': /* "Line-buffer" standard output */
1334 /* This isn't line-buffering, strictly speaking, it's just
1335 flushing the standard output after the information for
1336 each packet is printed; however, that should be good
1337 enough for all the purposes to which "-l" is put (and
1338 is probably actually better for "-V", as it does fewer
1341 See the comment in "process_packet()" for an explanation of
1342 why we do that, and why we don't just use "setvbuf()" to
1343 make the standard output line-buffered (short version: in
1344 Windows, "line-buffered" is the same as "fully-buffered",
1345 and the output buffer is only flushed when it fills up). */
1346 line_buffered = TRUE;
1348 case 'L': /* Print list of link-layer types and exit */
1350 list_link_layer_types = TRUE;
1352 capture_option_specified = TRUE;
1356 case 'n': /* No name resolution */
1357 gbl_resolv_flags.mac_name = FALSE;
1358 gbl_resolv_flags.network_name = FALSE;
1359 gbl_resolv_flags.transport_name = FALSE;
1360 gbl_resolv_flags.concurrent_dns = FALSE;
1362 case 'N': /* Select what types of addresses/port #s to resolve */
1363 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1364 if (badopt != '\0') {
1365 cmdarg_err("-N specifies unknown resolving option '%c';",
1367 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1371 case 'o': /* Override preference from command line */
1372 switch (prefs_set_pref(optarg)) {
1377 case PREFS_SET_SYNTAX_ERR:
1378 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1382 case PREFS_SET_NO_SUCH_PREF:
1383 case PREFS_SET_OBSOLETE:
1384 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1389 case 'q': /* Quiet */
1392 case 'Q': /* Really quiet */
1394 really_quiet = TRUE;
1396 case 'r': /* Read capture file x */
1397 cf_name = g_strdup(optarg);
1399 case 'R': /* Read file filter */
1403 /* already processed; just ignore it now */
1405 case 'S': /* Set the line Separator to be printed between packets */
1406 separator = strdup(optarg);
1408 case 't': /* Time stamp type */
1409 if (strcmp(optarg, "r") == 0)
1410 timestamp_set_type(TS_RELATIVE);
1411 else if (strcmp(optarg, "a") == 0)
1412 timestamp_set_type(TS_ABSOLUTE);
1413 else if (strcmp(optarg, "ad") == 0)
1414 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1415 else if (strcmp(optarg, "d") == 0)
1416 timestamp_set_type(TS_DELTA);
1417 else if (strcmp(optarg, "dd") == 0)
1418 timestamp_set_type(TS_DELTA_DIS);
1419 else if (strcmp(optarg, "e") == 0)
1420 timestamp_set_type(TS_EPOCH);
1421 else if (strcmp(optarg, "u") == 0)
1422 timestamp_set_type(TS_UTC);
1423 else if (strcmp(optarg, "ud") == 0)
1424 timestamp_set_type(TS_UTC_WITH_DATE);
1426 cmdarg_err("Invalid time stamp type \"%s\"",
1428 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1429 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1430 cmdarg_err_cont("or \"ud\" for UTC with date.");
1434 case 'T': /* printing Type */
1435 if (strcmp(optarg, "text") == 0) {
1436 output_action = WRITE_TEXT;
1437 print_format = PR_FMT_TEXT;
1438 } else if (strcmp(optarg, "ps") == 0) {
1439 output_action = WRITE_TEXT;
1440 print_format = PR_FMT_PS;
1441 } else if (strcmp(optarg, "pdml") == 0) {
1442 output_action = WRITE_XML;
1443 print_details = TRUE; /* Need details */
1444 print_summary = FALSE; /* Don't allow summary */
1445 } else if (strcmp(optarg, "psml") == 0) {
1446 output_action = WRITE_XML;
1447 print_details = FALSE; /* Don't allow details */
1448 print_summary = TRUE; /* Need summary */
1449 } else if (strcmp(optarg, "fields") == 0) {
1450 output_action = WRITE_FIELDS;
1451 print_details = TRUE; /* Need full tree info */
1452 print_summary = FALSE; /* Don't allow summary */
1454 cmdarg_err("Invalid -T parameter.");
1455 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1459 case 'u': /* Seconds type */
1460 if (strcmp(optarg, "s") == 0)
1461 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1462 else if (strcmp(optarg, "hms") == 0)
1463 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1465 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1466 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1470 case 'v': /* Show version and exit */
1472 show_version(comp_info_str, runtime_info_str);
1473 g_string_free(comp_info_str, TRUE);
1474 g_string_free(runtime_info_str, TRUE);
1475 /* We don't really have to cleanup here, but it's a convenient way to test
1476 * start-up and shut-down of the epan library without any UI-specific
1477 * cruft getting in the way. Makes the results of running
1478 * $ ./tools/valgrind-wireshark -n
1479 * much more useful. */
1483 case 'O': /* Only output these protocols */
1484 /* already processed; just ignore it now */
1486 case 'V': /* Verbose */
1487 /* already processed; just ignore it now */
1489 case 'x': /* Print packet data in hex (and ASCII) */
1490 /* already processed; just ignore it now */
1498 /* We won't call the init function for the stat this soon
1499 as it would disallow MATE's fields (which are registered
1500 by the preferences set callback) from being used as
1501 part of a tap filter. Instead, we just add the argument
1502 to a list of stat arguments. */
1503 if (!process_stat_cmd_arg(optarg)) {
1504 if (strcmp("help", optarg)==0) {
1505 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1506 list_stat_cmd_args();
1509 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1510 cmdarg_err_cont(" -z argument must be one of :");
1511 list_stat_cmd_args();
1516 case '?': /* Bad flag - print usage message */
1519 list_capture_types();
1529 /* If we specified output fields, but not the output field type... */
1530 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1531 cmdarg_err("Output fields were specified with \"-e\", "
1532 "but \"-Tfields\" was not specified.");
1534 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1535 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1536 "specified with \"-e\".");
1541 /* If no capture filter or display filter has been specified, and there are
1542 still command-line arguments, treat them as the tokens of a capture
1543 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1544 flag was specified. */
1545 if (optind < argc) {
1546 if (cf_name != NULL) {
1547 if (dfilter != NULL) {
1548 cmdarg_err("Display filters were specified both with \"-d\" "
1549 "and with additional command-line arguments.");
1552 dfilter = get_args_as_string(argc, argv, optind);
1557 if (global_capture_opts.default_options.cfilter) {
1558 cmdarg_err("A default capture filter was specified both with \"-f\""
1559 " and with additional command-line arguments.");
1562 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1563 interface_options interface_opts;
1564 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1565 if (interface_opts.cfilter == NULL) {
1566 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1567 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1568 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1570 cmdarg_err("A capture filter was specified both with \"-f\""
1571 " and with additional command-line arguments.");
1575 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1577 capture_option_specified = TRUE;
1583 if (!global_capture_opts.saving_to_file) {
1584 /* We're not saving the capture to a file; if "-q" wasn't specified,
1585 we should print packet information */
1587 print_packet_info = TRUE;
1589 /* We're saving to a file; if we're writing to the standard output.
1590 and we'll also be writing dissected packets to the standard
1591 output, reject the request. At best, we could redirect that
1592 to the standard error; we *can't* write both to the standard
1593 output and have either of them be useful. */
1594 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1595 cmdarg_err("You can't write both raw packet data and dissected packets"
1596 " to the standard output.");
1601 /* We're not saving the capture to a file; if "-q" wasn't specified,
1602 we should print packet information */
1604 print_packet_info = TRUE;
1607 #ifndef HAVE_LIBPCAP
1608 if (capture_option_specified)
1609 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1617 if (output_action != WRITE_TEXT) {
1618 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1623 if (output_only != NULL) {
1626 if (!print_details) {
1627 cmdarg_err("-O requires -V");
1631 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1632 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1633 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1637 if (rfilter != NULL && !perform_two_pass_analysis) {
1638 /* Just a warning, so we don't return */
1639 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1643 if (list_link_layer_types) {
1644 /* We're supposed to list the link-layer types for an interface;
1645 did the user also specify a capture file to be read? */
1647 /* Yes - that's bogus. */
1648 cmdarg_err("You can't specify -L and a capture file to be read.");
1651 /* No - did they specify a ring buffer option? */
1652 if (global_capture_opts.multi_files_on) {
1653 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1659 * "-r" was specified, so we're reading a capture file.
1660 * Capture options don't apply here.
1663 /* We don't support capture filters when reading from a capture file
1664 (the BPF compiler doesn't support all link-layer types that we
1665 support in capture files we read). */
1666 if (global_capture_opts.default_options.cfilter) {
1667 cmdarg_err("Only read filters, not capture filters, "
1668 "can be specified when reading a capture file.");
1671 if (global_capture_opts.multi_files_on) {
1672 cmdarg_err("Multiple capture files requested, but "
1673 "a capture isn't being done.");
1676 if (global_capture_opts.has_file_duration) {
1677 cmdarg_err("Switching capture files after a time interval was specified, but "
1678 "a capture isn't being done.");
1681 if (global_capture_opts.has_ring_num_files) {
1682 cmdarg_err("A ring buffer of capture files was specified, but "
1683 "a capture isn't being done.");
1686 if (global_capture_opts.has_autostop_files) {
1687 cmdarg_err("A maximum number of capture files was specified, but "
1688 "a capture isn't being done.");
1691 if (global_capture_opts.capture_comment) {
1692 cmdarg_err("A capture comment was specified, but "
1693 "a capture isn't being done.\nThere's no support for adding "
1694 "a capture comment to an existing capture file.");
1698 /* Note: TShark now allows the restriction of a _read_ file by packet count
1699 * and byte count as well as a write file. Other autostop options remain valid
1700 * only for a write file.
1702 if (global_capture_opts.has_autostop_duration) {
1703 cmdarg_err("A maximum capture time was specified, but "
1704 "a capture isn't being done.");
1709 * "-r" wasn't specified, so we're doing a live capture.
1711 if (global_capture_opts.saving_to_file) {
1712 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1714 /* When capturing, we only support writing pcap or pcap-ng format. */
1715 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1716 cmdarg_err("Live captures can only be saved in libpcap format.");
1719 if (global_capture_opts.capture_comment && out_file_type != WTAP_FILE_PCAPNG) {
1720 cmdarg_err("A capture comment can only be written to a pcapng file.");
1723 if (global_capture_opts.multi_files_on) {
1724 /* Multiple-file mode doesn't work under certain conditions:
1725 a) it doesn't work if you're writing to the standard output;
1726 b) it doesn't work if you're writing to a pipe;
1728 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1729 cmdarg_err("Multiple capture files requested, but "
1730 "the capture is being written to the standard output.");
1733 if (global_capture_opts.output_to_pipe) {
1734 cmdarg_err("Multiple capture files requested, but "
1735 "the capture file is a pipe.");
1738 if (!global_capture_opts.has_autostop_filesize &&
1739 !global_capture_opts.has_file_duration) {
1740 cmdarg_err("Multiple capture files requested, but "
1741 "no maximum capture file size or duration was specified.");
1745 /* Currently, we don't support read or display filters when capturing
1746 and saving the packets. */
1747 if (rfilter != NULL) {
1748 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1751 if (dfilter != NULL) {
1752 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1756 /* They didn't specify a "-w" flag, so we won't be saving to a
1757 capture file. Check for options that only make sense if
1758 we're saving to a file. */
1759 if (global_capture_opts.has_autostop_filesize) {
1760 cmdarg_err("Maximum capture file size specified, but "
1761 "capture isn't being saved to a file.");
1764 if (global_capture_opts.multi_files_on) {
1765 cmdarg_err("Multiple capture files requested, but "
1766 "the capture isn't being saved to a file.");
1769 if (global_capture_opts.capture_comment) {
1770 cmdarg_err("A capture comment was specified, but "
1771 "the capture isn't being saved to a file.");
1780 /* Start windows sockets */
1781 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1784 /* Notify all registered modules that have had any of their preferences
1785 changed either from one of the preferences file or from the command
1786 line that their preferences have changed. */
1789 /* At this point MATE will have registered its field array so we can
1790 have a tap filter with one of MATE's late-registered fields as part
1791 of the filter. We can now process all the "-z" arguments. */
1792 start_requested_stats();
1795 /* We currently don't support taps, or printing dissected packets,
1796 if we're writing to a pipe. */
1797 if (global_capture_opts.saving_to_file &&
1798 global_capture_opts.output_to_pipe) {
1799 if (tap_listeners_require_dissection()) {
1800 cmdarg_err("Taps aren't supported when saving to a pipe.");
1803 if (print_packet_info) {
1804 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1810 /* disabled protocols as per configuration file */
1811 if (gdp_path == NULL && dp_path == NULL) {
1812 set_disabled_protos_list();
1815 /* Build the column format array */
1816 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1819 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1820 capture_opts_trim_ring_num_files(&global_capture_opts);
1823 if (rfilter != NULL) {
1824 if (!dfilter_compile(rfilter, &rfcode)) {
1825 cmdarg_err("%s", dfilter_error_msg);
1827 #ifdef HAVE_PCAP_OPEN_DEAD
1831 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1833 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1835 " Note: That read filter code looks like a valid capture filter;");
1837 " maybe you mixed them up?");
1846 cfile.rfcode = rfcode;
1848 if (dfilter != NULL) {
1849 if (!dfilter_compile(dfilter, &dfcode)) {
1850 cmdarg_err("%s", dfilter_error_msg);
1852 #ifdef HAVE_PCAP_OPEN_DEAD
1856 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1858 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1860 " Note: That display filter code looks like a valid capture filter;");
1862 " maybe you mixed them up?");
1871 cfile.dfcode = dfcode;
1873 if (print_packet_info) {
1874 /* If we're printing as text or PostScript, we have
1875 to create a print stream. */
1876 if (output_action == WRITE_TEXT) {
1877 switch (print_format) {
1880 print_stream = print_stream_text_stdio_new(stdout);
1884 print_stream = print_stream_ps_stdio_new(stdout);
1888 g_assert_not_reached();
1893 /* We have to dissect each packet if:
1895 we're printing information about each packet;
1897 we're using a read filter on the packets;
1899 we're using a display filter on the packets;
1901 we're using any taps that need dissection. */
1902 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1906 * We're reading a capture file.
1910 * Immediately relinquish any special privileges we have; we must not
1911 * be allowed to read any capture files the user running TShark
1914 relinquish_special_privs_perm();
1915 print_current_user();
1917 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1922 /* Set timestamp precision; there should arguably be a command-line
1923 option to let the user set this. */
1924 switch(wtap_file_tsprecision(cfile.wth)) {
1925 case(WTAP_FILE_TSPREC_SEC):
1926 timestamp_set_precision(TS_PREC_AUTO_SEC);
1928 case(WTAP_FILE_TSPREC_DSEC):
1929 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1931 case(WTAP_FILE_TSPREC_CSEC):
1932 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1934 case(WTAP_FILE_TSPREC_MSEC):
1935 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1937 case(WTAP_FILE_TSPREC_USEC):
1938 timestamp_set_precision(TS_PREC_AUTO_USEC);
1940 case(WTAP_FILE_TSPREC_NSEC):
1941 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1944 g_assert_not_reached();
1947 /* Process the packets in the file */
1950 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1951 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1952 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1954 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1957 CATCH(OutOfMemoryError) {
1961 "Sorry, but TShark has to terminate now!\n"
1963 "Some infos / workarounds can be found at:\n"
1964 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1969 /* We still dump out the results of taps, etc., as we might have
1970 read some packets; however, we exit with an error status. */
1974 /* No capture file specified, so we're supposed to do a live capture
1975 or get a list of link-layer types for a live capture device;
1976 do we have support for live captures? */
1978 /* if no interface was specified, pick a default */
1979 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1980 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1981 if (exit_status != 0)
1984 /* if requested, list the link layer types and exit */
1985 if (list_link_layer_types) {
1988 /* Get the list of link-layer types for the capture devices. */
1989 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1990 interface_options interface_opts;
1991 if_capabilities_t *caps;
1993 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1994 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1996 cmdarg_err("%s", err_str);
2000 if (caps->data_link_types == NULL) {
2001 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
2004 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
2005 free_if_capabilities(caps);
2011 * If the standard error isn't a terminal, don't print packet counts,
2012 * as they won't show up on the user's terminal and they'll get in
2013 * the way of error messages in the file (to which we assume the
2014 * standard error was redirected; if it's redirected to the null
2015 * device, there's no point in printing packet counts anyway).
2017 * Otherwise, if we're printing packet information and the standard
2018 * output is a terminal (which we assume means the standard output and
2019 * error are going to the same terminal), don't print packet counts,
2020 * as they'll get in the way of the packet information.
2022 * Otherwise, if the user specified -q, don't print packet counts.
2024 * Otherwise, print packet counts.
2026 * XXX - what if the user wants to do a live capture, doesn't want
2027 * to save it to a file, doesn't want information printed for each
2028 * packet, does want some "-z" statistic, and wants packet counts
2029 * so they know whether they're seeing any packets? -q will
2030 * suppress the information printed for each packet, but it'll
2031 * also suppress the packet counts.
2033 if (!isatty(fileno(stderr)))
2034 print_packet_counts = FALSE;
2035 else if (print_packet_info && isatty(fileno(stdout)))
2036 print_packet_counts = FALSE;
2038 print_packet_counts = FALSE;
2040 print_packet_counts = TRUE;
2042 if (print_packet_info) {
2043 if (!write_preamble(NULL)) {
2044 show_print_file_io_error(errno);
2049 /* For now, assume libpcap gives microsecond precision. */
2050 timestamp_set_precision(TS_PREC_AUTO_USEC);
2053 * XXX - this returns FALSE if an error occurred, but it also
2054 * returns FALSE if the capture stops because a time limit
2055 * was reached (and possibly other limits), so we can't assume
2056 * it means an error.
2058 * The capture code is a bit twisty, so it doesn't appear to
2059 * be an easy fix. We just ignore the return value for now.
2060 * Instead, pass on the exit status from the capture child.
2063 exit_status = global_capture_session.fork_child_status;
2065 if (print_packet_info) {
2066 if (!write_finale()) {
2068 show_print_file_io_error(err);
2072 /* No - complain. */
2073 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2080 if (cfile.frames != NULL) {
2081 free_frame_data_sequence(cfile.frames);
2082 cfile.frames = NULL;
2085 draw_tap_listeners(TRUE);
2086 funnel_dump_all_text_windows();
2087 epan_free(cfile.epan);
2090 output_fields_free(output_fields);
2091 output_fields = NULL;
2096 /*#define USE_BROKEN_G_MAIN_LOOP*/
2098 #ifdef USE_BROKEN_G_MAIN_LOOP
2101 gboolean loop_running = FALSE;
2103 guint32 packet_count = 0;
2106 /* XXX - move to the right position / file */
2107 /* read from a pipe (callback) */
2108 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2110 typedef struct pipe_input_tag {
2114 pipe_input_cb_t input_cb;
2115 guint pipe_input_id;
2117 GMutex *callback_running;
2121 static pipe_input_t pipe_input;
2124 /* The timer has expired, see if there's stuff to read from the pipe,
2125 if so, do the callback */
2127 pipe_timer_cb(gpointer data)
2133 pipe_input_t *pipe_input_p = data;
2134 gint iterations = 0;
2136 g_mutex_lock (pipe_input_p->callback_running);
2138 /* try to read data from the pipe only 5 times, to avoid blocking */
2139 while(iterations < 5) {
2140 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2142 /* Oddly enough although Named pipes don't work on win9x,
2143 PeekNamedPipe does !!! */
2144 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2145 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2147 /* Get the child process exit status */
2148 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2151 /* If the Peek returned an error, or there are bytes to be read
2152 or the childwatcher thread has terminated then call the normal
2154 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2156 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2158 /* And call the real handler */
2159 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2160 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2161 /* pipe closed, return false so that the timer is stopped */
2162 g_mutex_unlock (pipe_input_p->callback_running);
2167 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2168 /* No data, stop now */
2175 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2177 g_mutex_unlock (pipe_input_p->callback_running);
2179 /* we didn't stopped the timer, so let it run */
2186 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2189 pipe_input.source = source;
2190 pipe_input.child_process = child_process;
2191 pipe_input.user_data = user_data;
2192 pipe_input.input_cb = input_cb;
2195 #if GLIB_CHECK_VERSION(2,31,0)
2196 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2197 g_mutex_init(pipe_input.callback_running);
2199 pipe_input.callback_running = g_mutex_new();
2201 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2202 do this but that doesn't cover all win32 platforms. GTK can do
2203 this but doesn't seem to work over processes. Attempt to do
2204 something similar here, start a timer and check for data on every
2206 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2207 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2211 static const nstime_t *
2212 tshark_get_frame_ts(void *data, guint32 frame_num)
2214 capture_file *cf = (capture_file *) data;
2216 if (ref && ref->num == frame_num)
2217 return &ref->abs_ts;
2219 if (prev_dis && prev_dis->num == frame_num)
2220 return &prev_dis->abs_ts;
2222 if (prev_cap && prev_cap->num == frame_num)
2223 return &prev_cap->abs_ts;
2226 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2228 return (fd) ? &fd->abs_ts : NULL;
2235 tshark_epan_new(capture_file *cf)
2237 epan_t *epan = epan_new();
2240 epan->get_frame_ts = tshark_get_frame_ts;
2241 epan->get_interface_name = cap_file_get_interface_name;
2242 epan->get_user_comment = NULL;
2253 GString *str = g_string_new("");
2254 #ifdef USE_TSHARK_SELECT
2258 struct sigaction action, oldaction;
2262 * XXX - dropping privileges is still required, until code cleanup is done
2264 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2265 * when it's done, we don't need special privileges to run tshark at all,
2266 * therefore we don't need to drop these privileges
2267 * The only thing we might want to keep is a warning if tshark is run as root,
2268 * as it's no longer necessary and potentially dangerous.
2270 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2271 * We've opened the capture device, so we shouldn't need any special
2272 * privileges any more; relinquish those privileges.
2274 * XXX - if we have saved set-user-ID support, we should give up those
2275 * privileges immediately, and then reclaim them long enough to get
2276 * a list of network interfaces and to open one, and then give them
2277 * up again, so that stuff we do while processing the argument list,
2278 * reading the user's preferences, loading and starting plugins
2279 * (especially *user* plugins), etc. is done with the user's privileges,
2280 * not special privileges.
2282 relinquish_special_privs_perm();
2283 print_current_user();
2285 /* Create new dissection section. */
2286 epan_free(cfile.epan);
2287 cfile.epan = tshark_epan_new(&cfile);
2290 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2291 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2293 /* Catch SIGINT and SIGTERM and, if we get either of them,
2294 clean up and exit. If SIGHUP isn't being ignored, catch
2295 it too and, if we get it, clean up and exit.
2297 We restart any read that was in progress, so that it doesn't
2298 disrupt reading from the sync pipe. The signal handler tells
2299 the capture child to finish; it will report that it finished,
2300 or will exit abnormally, so we'll stop reading from the sync
2301 pipe, pick up the exit status, and quit. */
2302 memset(&action, 0, sizeof(action));
2303 action.sa_handler = capture_cleanup;
2304 action.sa_flags = SA_RESTART;
2305 sigemptyset(&action.sa_mask);
2306 sigaction(SIGTERM, &action, NULL);
2307 sigaction(SIGINT, &action, NULL);
2308 sigaction(SIGHUP, NULL, &oldaction);
2309 if (oldaction.sa_handler == SIG_DFL)
2310 sigaction(SIGHUP, &action, NULL);
2313 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2314 quiet mode, report the number of packets we've captured.
2316 Again, restart any read that was in progress, so that it doesn't
2317 disrupt reading from the sync pipe. */
2318 action.sa_handler = report_counts_siginfo;
2319 action.sa_flags = SA_RESTART;
2320 sigemptyset(&action.sa_mask);
2321 sigaction(SIGINFO, &action, NULL);
2322 #endif /* SIGINFO */
2325 global_capture_session.state = CAPTURE_PREPARING;
2327 /* Let the user know which interfaces were chosen. */
2328 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2329 interface_options interface_opts;
2331 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2332 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2333 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2334 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2337 if (global_capture_opts.ifaces->len < 2) {
2339 if (global_capture_opts.ifaces->len < 4) {
2341 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2342 interface_options interface_opts;
2344 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2346 if (global_capture_opts.ifaces->len > 2) {
2347 g_string_append_printf(str, ",");
2349 g_string_append_printf(str, " ");
2350 if (i == global_capture_opts.ifaces->len - 1) {
2351 g_string_append_printf(str, "and ");
2354 g_string_append_printf(str, "'%s'", interface_opts.descr);
2357 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2359 if (really_quiet == FALSE)
2360 fprintf(stderr, "Capturing on %s\n", str->str);
2362 g_string_free(str, TRUE);
2364 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2369 /* the actual capture loop
2371 * XXX - glib doesn't seem to provide any event based loop handling.
2373 * XXX - for whatever reason,
2374 * calling g_main_loop_new() ends up in 100% cpu load.
2376 * But that doesn't matter: in UNIX we can use select() to find an input
2377 * source with something to do.
2379 * But that doesn't matter because we're in a CLI (that doesn't need to
2380 * update a GUI or something at the same time) so it's OK if we block
2381 * trying to read from the pipe.
2383 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2384 * wrong (but I leave it there in case I am...).
2387 #ifdef USE_TSHARK_SELECT
2389 FD_SET(pipe_input.source, &readfds);
2392 loop_running = TRUE;
2396 while (loop_running)
2398 #ifdef USE_TSHARK_SELECT
2399 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2405 } else if (ret == 1) {
2407 /* Call the real handler */
2408 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2409 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2412 #ifdef USE_TSHARK_SELECT
2417 CATCH(OutOfMemoryError) {
2421 "Sorry, but TShark has to terminate now!\n"
2423 "Some infos / workarounds can be found at:\n"
2424 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2431 /* capture child detected an error */
2433 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2435 cmdarg_err("%s", error_msg);
2436 cmdarg_err_cont("%s", secondary_error_msg);
2440 /* capture child detected an capture filter related error */
2442 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2444 capture_options *capture_opts = cap_session->capture_opts;
2445 dfilter_t *rfcode = NULL;
2446 interface_options interface_opts;
2448 g_assert(i < capture_opts->ifaces->len);
2449 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2451 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2453 "Invalid capture filter \"%s\" for interface %s!\n"
2455 "That string looks like a valid display filter; however, it isn't a valid\n"
2456 "capture filter (%s).\n"
2458 "Note that display filters and capture filters don't have the same syntax,\n"
2459 "so you can't use most display filter expressions as capture filters.\n"
2461 "See the User's Guide for a description of the capture filter syntax.",
2462 interface_opts.cfilter, interface_opts.descr, error_message);
2463 dfilter_free(rfcode);
2466 "Invalid capture filter \"%s\" for interface %s!\n"
2468 "That string isn't a valid capture filter (%s).\n"
2469 "See the User's Guide for a description of the capture filter syntax.",
2470 interface_opts.cfilter, interface_opts.descr, error_message);
2475 /* capture child tells us we have a new (or the first) capture file */
2477 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2479 capture_options *capture_opts = cap_session->capture_opts;
2480 gboolean is_tempfile;
2483 if (cap_session->state == CAPTURE_PREPARING) {
2484 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2486 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2488 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2490 /* free the old filename */
2491 if (capture_opts->save_file != NULL) {
2493 /* we start a new capture file, close the old one (if we had one before) */
2494 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2495 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2496 wtap_close(((capture_file *) cap_session->cf)->wth);
2498 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2501 g_free(capture_opts->save_file);
2502 is_tempfile = FALSE;
2504 /* we didn't had a save_file before, must be a tempfile */
2508 /* save the new filename */
2509 capture_opts->save_file = g_strdup(new_file);
2511 /* if we are in real-time mode, open the new file now */
2512 if (do_dissection) {
2513 /* Attempt to open the capture file and set up to read from it. */
2514 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2518 /* Don't unlink (delete) the save file - leave it around,
2519 for debugging purposes. */
2520 g_free(capture_opts->save_file);
2521 capture_opts->save_file = NULL;
2526 cap_session->state = CAPTURE_RUNNING;
2532 /* capture child tells us we have new packets to read */
2534 capture_input_new_packets(capture_session *cap_session, int to_read)
2540 capture_file *cf = (capture_file *)cap_session->cf;
2541 gboolean filtering_tap_listeners;
2546 * Prevent a SIGINFO handler from writing to the standard error while
2547 * we're doing so or writing to the standard output; instead, have it
2548 * just set a flag telling us to print that information when we're done.
2551 #endif /* SIGINFO */
2553 /* Do we have any tap listeners with filters? */
2554 filtering_tap_listeners = have_filtering_tap_listeners();
2556 /* Get the union of the flags for all tap listeners. */
2557 tap_flags = union_of_tap_listener_flags();
2559 if (do_dissection) {
2560 while (to_read-- && cf->wth) {
2561 wtap_cleareof(cf->wth);
2562 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2564 /* read from file failed, tell the capture child to stop */
2565 sync_pipe_stop(cap_session);
2566 wtap_close(cf->wth);
2569 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2570 wtap_buf_ptr(cf->wth),
2571 filtering_tap_listeners, tap_flags);
2574 /* packet successfully read and gone through the "Read Filter" */
2580 * Dumpcap's doing all the work; we're not doing any dissection.
2581 * Count all the packets it wrote.
2583 packet_count += to_read;
2586 if (print_packet_counts) {
2587 /* We're printing packet counts. */
2588 if (packet_count != 0) {
2589 fprintf(stderr, "\r%u ", packet_count);
2590 /* stderr could be line buffered */
2597 * Allow SIGINFO handlers to write.
2602 * If a SIGINFO handler asked us to write out capture counts, do so.
2606 #endif /* SIGINFO */
2612 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2613 /* Report the count only if we aren't printing a packet count
2614 as packets arrive. */
2615 fprintf(stderr, "%u packet%s captured\n", packet_count,
2616 plurality(packet_count, "", "s"));
2619 infoprint = FALSE; /* we just reported it */
2620 #endif /* SIGINFO */
2625 report_counts_siginfo(int signum _U_)
2627 int sav_errno = errno;
2628 /* If we've been told to delay printing, just set a flag asking
2629 that we print counts (if we're supposed to), otherwise print
2630 the count of packets captured (if we're supposed to). */
2637 #endif /* SIGINFO */
2640 /* capture child detected any packet drops? */
2642 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2644 if (print_packet_counts) {
2645 /* We're printing packet counts to stderr.
2646 Send a newline so that we move to the line after the packet count. */
2647 fprintf(stderr, "\n");
2651 /* We're printing packet counts to stderr.
2652 Send a newline so that we move to the line after the packet count. */
2653 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2659 * Capture child closed its side of the pipe, report any error and
2660 * do the required cleanup.
2663 capture_input_closed(capture_session *cap_session, gchar *msg)
2665 capture_file *cf = (capture_file *) cap_session->cf;
2668 fprintf(stderr, "tshark: %s\n", msg);
2672 if (cf != NULL && cf->wth != NULL) {
2673 wtap_close(cf->wth);
2674 if (cf->is_tempfile) {
2675 ws_unlink(cf->filename);
2678 #ifdef USE_BROKEN_G_MAIN_LOOP
2679 /*g_main_loop_quit(loop);*/
2682 loop_running = FALSE;
2691 capture_cleanup(DWORD ctrltype _U_)
2693 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2694 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2695 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2696 like SIGTERM at least when the machine's shutting down.
2698 For now, we handle them all as indications that we should clean up
2699 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2702 We must return TRUE so that no other handler - such as one that would
2703 terminate the process - gets called.
2705 XXX - for some reason, typing ^C to TShark, if you run this in
2706 a Cygwin console window in at least some versions of Cygwin,
2707 causes TShark to terminate immediately; this routine gets
2708 called, but the main loop doesn't get a chance to run and
2709 exit cleanly, at least if this is compiled with Microsoft Visual
2710 C++ (i.e., it's a property of the Cygwin console window or Bash;
2711 it happens if TShark is not built with Cygwin - for all I know,
2712 building it with Cygwin may make the problem go away). */
2714 /* tell the capture child to stop */
2715 sync_pipe_stop(&global_capture_session);
2717 /* don't stop our own loop already here, otherwise status messages and
2718 * cleanup wouldn't be done properly. The child will indicate the stop of
2719 * everything by calling capture_input_closed() later */
2725 capture_cleanup(int signum _U_)
2727 /* tell the capture child to stop */
2728 sync_pipe_stop(&global_capture_session);
2730 /* don't stop our own loop already here, otherwise status messages and
2731 * cleanup wouldn't be done properly. The child will indicate the stop of
2732 * everything by calling capture_input_closed() later */
2735 #endif /* HAVE_LIBPCAP */
2738 process_packet_first_pass(capture_file *cf,
2739 gint64 offset, struct wtap_pkthdr *whdr,
2744 gboolean create_proto_tree = FALSE;
2748 /* The frame number of this packet is one more than the count of
2749 frames in this packet. */
2750 framenum = cf->count + 1;
2752 /* If we're not running a display filter and we're not printing any
2753 packet information, we don't need to do a dissection. This means
2754 that all packets can be marked as 'passed'. */
2757 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2759 /* If we're going to print packet information, or we're going to
2760 run a read filter, or display filter, or we're going to process taps, set up to
2761 do a dissection and do so. */
2762 if (do_dissection) {
2763 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2764 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2765 /* Grab any resolved addresses */
2766 host_name_lookup_process();
2768 /* If we're going to be applying a filter, we'll need to
2769 create a protocol tree against which to apply the filter. */
2771 create_proto_tree = TRUE;
2773 /* We're not going to display the protocol tree on this pass,
2774 so it's not going to be "visible". */
2775 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2777 /* If we're running a read filter, prime the epan_dissect_t with that
2780 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2782 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2784 if (ref == &fdlocal) {
2785 ref_frame = fdlocal;
2789 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2791 /* Run the read filter if we have one. */
2793 passed = dfilter_apply_edt(cf->rfcode, &edt);
2797 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2798 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2800 /* If we're not doing dissection then there won't be any dependent frames.
2801 * More importantly, edt.pi.dependent_frames won't be initialized because
2802 * epan hasn't been initialized.
2804 if (do_dissection) {
2805 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2810 /* if we don't add it to the frame_data_sequence, clean it up right now
2812 frame_data_destroy(&fdlocal);
2816 epan_dissect_cleanup(&edt);
2822 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2823 struct wtap_pkthdr *phdr, Buffer *buf,
2824 gboolean filtering_tap_listeners, guint tap_flags)
2826 gboolean create_proto_tree;
2831 /* If we're not running a display filter and we're not printing any
2832 packet information, we don't need to do a dissection. This means
2833 that all packets can be marked as 'passed'. */
2836 /* If we're going to print packet information, or we're going to
2837 run a read filter, or we're going to process taps, set up to
2838 do a dissection and do so. */
2839 if (do_dissection) {
2840 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2841 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2842 /* Grab any resolved addresses */
2843 host_name_lookup_process();
2845 if (cf->dfcode || print_details || filtering_tap_listeners ||
2846 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2847 create_proto_tree = TRUE;
2849 create_proto_tree = FALSE;
2851 /* The protocol tree will be "visible", i.e., printed, only if we're
2852 printing packet details, which is true if we're printing stuff
2853 ("print_packet_info" is true) and we're in verbose mode
2854 ("packet_details" is true). */
2855 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2857 /* If we're running a display filter, prime the epan_dissect_t with that
2860 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2862 col_custom_prime_edt(&edt, &cf->cinfo);
2864 /* We only need the columns if either
2865 1) some tap needs the columns
2867 2) we're printing packet info but we're *not* verbose; in verbose
2868 mode, we print the protocol tree, not the protocol summary.
2870 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2875 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2882 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2884 /* Run the read/display filter if we have one. */
2886 passed = dfilter_apply_edt(cf->dfcode, &edt);
2890 frame_data_set_after_dissect(fdata, &cum_bytes);
2891 /* Process this packet. */
2892 if (print_packet_info) {
2893 /* We're printing packet information; print the information for
2896 print_packet(cf, &edt);
2898 print_packet(cf, NULL);
2900 /* The ANSI C standard does not appear to *require* that a line-buffered
2901 stream be flushed to the host environment whenever a newline is
2902 written, it just says that, on such a stream, characters "are
2903 intended to be transmitted to or from the host environment as a
2904 block when a new-line character is encountered".
2906 The Visual C++ 6.0 C implementation doesn't do what is intended;
2907 even if you set a stream to be line-buffered, it still doesn't
2908 flush the buffer at the end of every line.
2910 So, if the "-l" flag was specified, we flush the standard output
2911 at the end of a packet. This will do the right thing if we're
2912 printing packet summary lines, and, as we print the entire protocol
2913 tree for a single packet without waiting for anything to happen,
2914 it should be as good as line-buffered mode if we're printing
2915 protocol trees. (The whole reason for the "-l" flag in either
2916 tcpdump or TShark is to allow the output of a live capture to
2917 be piped to a program or script and to have that script see the
2918 information for the packet as soon as it's printed, rather than
2919 having to wait until a standard I/O buffer fills up. */
2923 if (ferror(stdout)) {
2924 show_print_file_io_error(errno);
2932 if (do_dissection) {
2933 epan_dissect_cleanup(&edt);
2935 return passed || fdata->flags.dependent_of_displayed;
2939 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2940 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2943 int snapshot_length;
2947 gchar *err_info = NULL;
2949 char *save_file_string = NULL;
2950 gboolean filtering_tap_listeners;
2952 wtapng_section_t *shb_hdr;
2953 wtapng_iface_descriptions_t *idb_inf;
2957 shb_hdr = wtap_file_get_shb_info(cf->wth);
2958 idb_inf = wtap_file_get_idb_info(cf->wth);
2959 #ifdef PCAP_NG_DEFAULT
2960 if (idb_inf->number_of_interfaces > 1) {
2961 linktype = WTAP_ENCAP_PER_PACKET;
2963 linktype = wtap_file_encap(cf->wth);
2966 linktype = wtap_file_encap(cf->wth);
2968 if (save_file != NULL) {
2969 /* Get a string that describes what we're writing to */
2970 save_file_string = output_file_description(save_file);
2972 /* Set up to write to the capture file. */
2973 snapshot_length = wtap_snapshot_length(cf->wth);
2974 if (snapshot_length == 0) {
2975 /* Snapshot length of input file not known. */
2976 snapshot_length = WTAP_MAX_PACKET_SIZE;
2978 /* If we don't have an application name add Tshark */
2979 if (shb_hdr->shb_user_appl == NULL) {
2980 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2981 shb_hdr->shb_user_appl = appname;
2984 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2985 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2986 snapshot_length, FALSE /* compressed */, &err);
2988 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2989 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2995 /* We couldn't set up to write to the capture file. */
2998 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2999 cmdarg_err("Capture files can't be written in that format.");
3002 case WTAP_ERR_UNSUPPORTED_ENCAP:
3003 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3004 cmdarg_err("The capture file being read can't be written as a "
3005 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
3008 case WTAP_ERR_CANT_OPEN:
3009 cmdarg_err("The %s couldn't be created for some "
3010 "unknown reason.", save_file_string);
3013 case WTAP_ERR_SHORT_WRITE:
3014 cmdarg_err("A full header couldn't be written to the %s.",
3019 cmdarg_err("The %s could not be created: %s.", save_file_string,
3020 wtap_strerror(err));
3026 if (print_packet_info) {
3027 if (!write_preamble(cf)) {
3029 show_print_file_io_error(err);
3036 if (pdh && out_file_name_res) {
3037 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
3038 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
3039 wtap_file_type_short_string(out_file_type));
3043 /* Do we have any tap listeners with filters? */
3044 filtering_tap_listeners = have_filtering_tap_listeners();
3046 /* Get the union of the flags for all tap listeners. */
3047 tap_flags = union_of_tap_listener_flags();
3049 if (perform_two_pass_analysis) {
3051 int old_max_packet_count = max_packet_count;
3053 /* Allocate a frame_data_sequence for all the frames. */
3054 cf->frames = new_frame_data_sequence();
3056 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3057 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3058 wtap_buf_ptr(cf->wth))) {
3059 /* Stop reading if we have the maximum number of packets;
3060 * When the -c option has not been used, max_packet_count
3061 * starts at 0, which practically means, never stop reading.
3062 * (unless we roll over max_packet_count ?)
3064 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3065 err = 0; /* This is not an error */
3071 /* Close the sequential I/O side, to free up memory it requires. */
3072 wtap_sequential_close(cf->wth);
3074 /* Allow the protocol dissectors to free up memory that they
3075 * don't need after the sequential run-through of the packets. */
3076 postseq_cleanup_all_protocols();
3078 max_packet_count = old_max_packet_count;
3082 buffer_init(&buf, 1500);
3083 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3084 fdata = frame_data_sequence_find(cf->frames, framenum);
3085 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3086 &buf, fdata->cap_len, &err, &err_info)) {
3087 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3088 filtering_tap_listeners, tap_flags)) {
3089 /* Either there's no read filtering or this packet passed the
3090 filter, so, if we're writing to a capture file, write
3093 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3094 /* Error writing to a capture file */
3097 case WTAP_ERR_UNSUPPORTED_ENCAP:
3099 * This is a problem with the particular frame we're writing;
3100 * note that, and give the frame number.
3102 * XXX - framenum is not necessarily the frame number in
3103 * the input file if there was a read filter.
3106 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3107 framenum, cf->filename,
3108 wtap_file_type_short_string(out_file_type));
3112 show_capture_file_io_error(save_file, err, FALSE);
3115 wtap_dump_close(pdh, &err);
3120 /* Stop reading if we have the maximum number of packets;
3121 * When the -c option has not been used, max_packet_count
3122 * starts at 0, which practically means, never stop reading.
3123 * (unless we roll over max_packet_count ?)
3125 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3126 err = 0; /* This is not an error */
3136 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3139 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3140 wtap_buf_ptr(cf->wth),
3141 filtering_tap_listeners, tap_flags)) {
3142 /* Either there's no read filtering or this packet passed the
3143 filter, so, if we're writing to a capture file, write
3146 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3147 /* Error writing to a capture file */
3150 case WTAP_ERR_UNSUPPORTED_ENCAP:
3152 * This is a problem with the particular frame we're writing;
3153 * note that, and give the frame number.
3156 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3157 framenum, cf->filename,
3158 wtap_file_type_short_string(out_file_type));
3162 show_capture_file_io_error(save_file, err, FALSE);
3165 wtap_dump_close(pdh, &err);
3170 /* Stop reading if we have the maximum number of packets;
3171 * When the -c option has not been used, max_packet_count
3172 * starts at 0, which practically means, never stop reading.
3173 * (unless we roll over max_packet_count ?)
3175 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3176 err = 0; /* This is not an error */
3185 * Print a message noting that the read failed somewhere along the line.
3187 * If we're printing packet data, and the standard output and error are
3188 * going to the same place, flush the standard output, so everything
3189 * buffered up is written, and then print a newline to the standard error
3190 * before printing the error message, to separate it from the packet
3191 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3192 * the _fstat() documentation at Microsoft doesn't indicate whether
3193 * st_ino is even supported.)
3196 if (print_packet_info) {
3197 struct stat stat_stdout, stat_stderr;
3199 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3200 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3201 stat_stdout.st_ino == stat_stderr.st_ino) {
3203 fprintf(stderr, "\n");
3210 case WTAP_ERR_UNSUPPORTED:
3211 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3212 cf->filename, err_info);
3216 case WTAP_ERR_UNSUPPORTED_ENCAP:
3217 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3218 cf->filename, err_info);
3222 case WTAP_ERR_CANT_READ:
3223 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3227 case WTAP_ERR_SHORT_READ:
3228 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3232 case WTAP_ERR_BAD_FILE:
3233 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3234 cf->filename, err_info);
3238 case WTAP_ERR_DECOMPRESS:
3239 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3240 "(%s)", cf->filename, err_info);
3244 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3245 cf->filename, wtap_strerror(err));
3248 if (save_file != NULL) {
3249 /* Now close the capture file. */
3250 if (!wtap_dump_close(pdh, &err))
3251 show_capture_file_io_error(save_file, err, TRUE);
3254 if (save_file != NULL) {
3255 /* Now close the capture file. */
3256 if (!wtap_dump_close(pdh, &err))
3257 show_capture_file_io_error(save_file, err, TRUE);
3259 if (print_packet_info) {
3260 if (!write_finale()) {
3262 show_print_file_io_error(err);
3269 wtap_close(cf->wth);
3272 g_free(save_file_string);
3279 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3281 gboolean filtering_tap_listeners, guint tap_flags)
3284 gboolean create_proto_tree;
3289 /* Count this packet. */
3292 /* If we're not running a display filter and we're not printing any
3293 packet information, we don't need to do a dissection. This means
3294 that all packets can be marked as 'passed'. */
3297 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3299 /* If we're going to print packet information, or we're going to
3300 run a read filter, or we're going to process taps, set up to
3301 do a dissection and do so. */
3302 if (do_dissection) {
3303 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3304 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3305 /* Grab any resolved addresses */
3306 host_name_lookup_process();
3308 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3309 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3310 create_proto_tree = TRUE;
3312 create_proto_tree = FALSE;
3314 /* The protocol tree will be "visible", i.e., printed, only if we're
3315 printing packet details, which is true if we're printing stuff
3316 ("print_packet_info" is true) and we're in verbose mode
3317 ("packet_details" is true). */
3318 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3320 /* If we're running a filter, prime the epan_dissect_t with that
3323 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3325 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3327 col_custom_prime_edt(&edt, &cf->cinfo);
3329 /* We only need the columns if either
3330 1) some tap needs the columns
3332 2) we're printing packet info but we're *not* verbose; in verbose
3333 mode, we print the protocol tree, not the protocol summary.
3335 3) there is a column mapped as an individual field */
3336 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3341 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3343 if (ref == &fdata) {
3348 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3350 /* Run the filters if we have them. */
3352 passed = dfilter_apply_edt(cf->rfcode, &edt);
3353 if (passed && cf->dfcode)
3354 passed = dfilter_apply_edt(cf->dfcode, &edt);
3358 frame_data_set_after_dissect(&fdata, &cum_bytes);
3360 /* Process this packet. */
3361 if (print_packet_info) {
3362 /* We're printing packet information; print the information for
3365 print_packet(cf, &edt);
3367 print_packet(cf, NULL);
3369 /* The ANSI C standard does not appear to *require* that a line-buffered
3370 stream be flushed to the host environment whenever a newline is
3371 written, it just says that, on such a stream, characters "are
3372 intended to be transmitted to or from the host environment as a
3373 block when a new-line character is encountered".
3375 The Visual C++ 6.0 C implementation doesn't do what is intended;
3376 even if you set a stream to be line-buffered, it still doesn't
3377 flush the buffer at the end of every line.
3379 So, if the "-l" flag was specified, we flush the standard output
3380 at the end of a packet. This will do the right thing if we're
3381 printing packet summary lines, and, as we print the entire protocol
3382 tree for a single packet without waiting for anything to happen,
3383 it should be as good as line-buffered mode if we're printing
3384 protocol trees. (The whole reason for the "-l" flag in either
3385 tcpdump or TShark is to allow the output of a live capture to
3386 be piped to a program or script and to have that script see the
3387 information for the packet as soon as it's printed, rather than
3388 having to wait until a standard I/O buffer fills up. */
3392 if (ferror(stdout)) {
3393 show_print_file_io_error(errno);
3398 /* this must be set after print_packet() [bug #8160] */
3399 prev_dis_frame = fdata;
3400 prev_dis = &prev_dis_frame;
3403 prev_cap_frame = fdata;
3404 prev_cap = &prev_cap_frame;
3406 if (do_dissection) {
3407 epan_dissect_cleanup(&edt);
3408 frame_data_destroy(&fdata);
3414 write_preamble(capture_file *cf)
3416 switch (output_action) {
3419 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3423 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3425 write_psml_preamble(stdout);
3426 return !ferror(stdout);
3429 write_fields_preamble(output_fields, stdout);
3430 return !ferror(stdout);
3433 g_assert_not_reached();
3439 get_line_buf(size_t len)
3441 static char *line_bufp = NULL;
3442 static size_t line_buf_len = 256;
3443 size_t new_line_buf_len;
3445 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3446 new_line_buf_len *= 2)
3448 if (line_bufp == NULL) {
3449 line_buf_len = new_line_buf_len;
3450 line_bufp = (char *)g_malloc(line_buf_len + 1);
3452 if (new_line_buf_len > line_buf_len) {
3453 line_buf_len = new_line_buf_len;
3454 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3461 print_columns(capture_file *cf)
3468 line_bufp = get_line_buf(256);
3471 for (i = 0; i < cf->cinfo.num_cols; i++) {
3472 /* Skip columns not marked as visible. */
3473 if (!get_column_visible(i))
3475 switch (cf->cinfo.col_fmt[i]) {
3479 * Don't print this if we're doing a live capture from a network
3480 * interface - if we're doing a live capture, you won't be
3481 * able to look at the capture in the future (it's not being
3482 * saved anywhere), so the frame numbers are unlikely to be
3485 * (XXX - it might be nice to be able to save and print at
3486 * the same time, sort of like an "Update list of packets
3487 * in real time" capture in Wireshark.)
3489 if (global_capture_opts.ifaces->len > 0)
3492 column_len = strlen(cf->cinfo.col_data[i]);
3495 line_bufp = get_line_buf(buf_offset + column_len);
3496 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3502 case COL_ABS_DATE_TIME:
3504 case COL_UTC_DATE_TIME: /* XXX - wider */
3505 column_len = strlen(cf->cinfo.col_data[i]);
3506 if (column_len < 10)
3508 line_bufp = get_line_buf(buf_offset + column_len);
3509 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3515 case COL_DEF_DL_SRC:
3516 case COL_RES_DL_SRC:
3517 case COL_UNRES_DL_SRC:
3518 case COL_DEF_NET_SRC:
3519 case COL_RES_NET_SRC:
3520 case COL_UNRES_NET_SRC:
3521 column_len = strlen(cf->cinfo.col_data[i]);
3522 if (column_len < 12)
3524 line_bufp = get_line_buf(buf_offset + column_len);
3525 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3531 case COL_DEF_DL_DST:
3532 case COL_RES_DL_DST:
3533 case COL_UNRES_DL_DST:
3534 case COL_DEF_NET_DST:
3535 case COL_RES_NET_DST:
3536 case COL_UNRES_NET_DST:
3537 column_len = strlen(cf->cinfo.col_data[i]);
3538 if (column_len < 12)
3540 line_bufp = get_line_buf(buf_offset + column_len);
3541 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3545 column_len = strlen(cf->cinfo.col_data[i]);
3546 line_bufp = get_line_buf(buf_offset + column_len);
3547 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3550 buf_offset += column_len;
3551 if (i != cf->cinfo.num_cols - 1) {
3553 * This isn't the last column, so we need to print a
3554 * separator between this column and the next.
3556 * If we printed a network source and are printing a
3557 * network destination of the same type next, separate
3558 * them with " -> "; if we printed a network destination
3559 * and are printing a network source of the same type
3560 * next, separate them with " <- "; otherwise separate them
3563 * We add enough space to the buffer for " <- " or " -> ",
3564 * even if we're only adding " ".
3566 line_bufp = get_line_buf(buf_offset + 4);
3567 switch (cf->cinfo.col_fmt[i]) {
3572 switch (cf->cinfo.col_fmt[i + 1]) {
3577 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3582 g_strlcat(line_bufp + buf_offset, " ", 5);
3588 case COL_DEF_DL_SRC:
3589 case COL_RES_DL_SRC:
3590 case COL_UNRES_DL_SRC:
3591 switch (cf->cinfo.col_fmt[i + 1]) {
3593 case COL_DEF_DL_DST:
3594 case COL_RES_DL_DST:
3595 case COL_UNRES_DL_DST:
3596 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3601 g_strlcat(line_bufp + buf_offset, " ", 5);
3607 case COL_DEF_NET_SRC:
3608 case COL_RES_NET_SRC:
3609 case COL_UNRES_NET_SRC:
3610 switch (cf->cinfo.col_fmt[i + 1]) {
3612 case COL_DEF_NET_DST:
3613 case COL_RES_NET_DST:
3614 case COL_UNRES_NET_DST:
3615 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3620 g_strlcat(line_bufp + buf_offset, " ", 5);
3629 switch (cf->cinfo.col_fmt[i + 1]) {
3634 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3639 g_strlcat(line_bufp + buf_offset, " ", 5);
3645 case COL_DEF_DL_DST:
3646 case COL_RES_DL_DST:
3647 case COL_UNRES_DL_DST:
3648 switch (cf->cinfo.col_fmt[i + 1]) {
3650 case COL_DEF_DL_SRC:
3651 case COL_RES_DL_SRC:
3652 case COL_UNRES_DL_SRC:
3653 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3658 g_strlcat(line_bufp + buf_offset, " ", 5);
3664 case COL_DEF_NET_DST:
3665 case COL_RES_NET_DST:
3666 case COL_UNRES_NET_DST:
3667 switch (cf->cinfo.col_fmt[i + 1]) {
3669 case COL_DEF_NET_SRC:
3670 case COL_RES_NET_SRC:
3671 case COL_UNRES_NET_SRC:
3672 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3677 g_strlcat(line_bufp + buf_offset, " ", 5);
3684 g_strlcat(line_bufp + buf_offset, " ", 5);
3690 return print_line(print_stream, 0, line_bufp);
3694 print_packet(capture_file *cf, epan_dissect_t *edt)
3696 print_args_t print_args;
3698 if (print_summary || output_fields_has_cols(output_fields)) {
3699 /* Just fill in the columns. */
3700 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3702 if (print_summary) {
3703 /* Now print them. */
3704 switch (output_action) {
3707 if (!print_columns(cf))
3712 proto_tree_write_psml(edt, stdout);
3713 return !ferror(stdout);
3714 case WRITE_FIELDS: /*No non-verbose "fields" format */
3715 g_assert_not_reached();
3720 if (print_details) {
3721 /* Print the information in the protocol tree. */
3722 switch (output_action) {
3725 /* Only initialize the fields that are actually used in proto_tree_print.
3726 * This is particularly important for .range, as that's heap memory which
3727 * we would otherwise have to g_free().
3728 print_args.to_file = TRUE;
3729 print_args.format = print_format;
3730 print_args.print_summary = print_summary;
3731 print_args.print_formfeed = FALSE;
3732 packet_range_init(&print_args.range, &cfile);
3734 print_args.print_hex = print_hex;
3735 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3737 if (!proto_tree_print(&print_args, edt, print_stream))
3740 if (!print_line(print_stream, 0, separator))
3746 proto_tree_write_pdml(edt, stdout);
3748 return !ferror(stdout);
3750 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3752 return !ferror(stdout);
3756 if (print_summary || print_details) {
3757 if (!print_line(print_stream, 0, ""))
3760 if (!print_hex_data(print_stream, edt))
3762 if (!print_line(print_stream, 0, separator))
3771 switch (output_action) {
3774 return print_finale(print_stream);
3778 write_pdml_finale(stdout);
3780 write_psml_finale(stdout);
3781 return !ferror(stdout);
3784 write_fields_finale(output_fields, stdout);
3785 return !ferror(stdout);
3788 g_assert_not_reached();
3794 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3798 char err_msg[2048+1];
3800 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3804 /* The open succeeded. Fill in the information for this file. */
3806 /* Create new epan session for dissection. */
3807 epan_free(cf->epan);
3808 cf->epan = tshark_epan_new(cf);
3811 cf->f_datalen = 0; /* not used, but set it anyway */
3813 /* Set the file name because we need it to set the follow stream filter.
3814 XXX - is that still true? We need it for other reasons, though,
3816 cf->filename = g_strdup(fname);
3818 /* Indicate whether it's a permanent or temporary file. */
3819 cf->is_tempfile = is_tempfile;
3821 /* No user changes yet. */
3822 cf->unsaved_changes = FALSE;
3824 cf->cd_t = wtap_file_type(cf->wth);
3826 cf->drops_known = FALSE;
3828 cf->snap = wtap_snapshot_length(cf->wth);
3829 if (cf->snap == 0) {
3830 /* Snapshot length not known. */
3831 cf->has_snap = FALSE;
3832 cf->snap = WTAP_MAX_PACKET_SIZE;
3834 cf->has_snap = TRUE;
3835 nstime_set_zero(&cf->elapsed_time);
3840 cf->state = FILE_READ_IN_PROGRESS;
3842 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3843 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3848 g_snprintf(err_msg, sizeof err_msg,
3849 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3850 cmdarg_err("%s", err_msg);
3855 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3857 char *save_file_string;
3859 save_file_string = output_file_description(fname);
3864 cmdarg_err("Not all the packets could be written to the %s because there is "
3865 "no space left on the file system.",
3871 cmdarg_err("Not all the packets could be written to the %s because you are "
3872 "too close to, or over your disk quota.",
3877 case WTAP_ERR_CANT_CLOSE:
3878 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3882 case WTAP_ERR_SHORT_WRITE:
3883 cmdarg_err("Not all the packets could be written to the %s.",
3889 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3890 wtap_strerror(err));
3892 cmdarg_err("An error occurred while writing to the %s: %s.",
3893 save_file_string, wtap_strerror(err));
3897 g_free(save_file_string);
3901 show_print_file_io_error(int err)
3906 cmdarg_err("Not all the packets could be printed because there is "
3907 "no space left on the file system.");
3912 cmdarg_err("Not all the packets could be printed because you are "
3913 "too close to, or over your disk quota.");
3918 cmdarg_err("An error occurred while printing packets: %s.",
3925 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3929 static char errmsg_errno[1024+1];
3932 /* Wiretap error. */
3935 case WTAP_ERR_NOT_REGULAR_FILE:
3936 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3939 case WTAP_ERR_RANDOM_OPEN_PIPE:
3940 /* Seen only when opening a capture file for reading. */
3941 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3944 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3945 /* Seen only when opening a capture file for reading. */
3946 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3949 case WTAP_ERR_UNSUPPORTED:
3950 /* Seen only when opening a capture file for reading. */
3951 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3952 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3955 errmsg = errmsg_errno;
3958 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3959 /* Seen only when opening a capture file for writing. */
3960 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3961 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3962 "written to a pipe.", wtap_file_type_short_string(file_type));
3963 errmsg = errmsg_errno;
3966 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3967 /* Seen only when opening a capture file for writing. */
3968 errmsg = "TShark doesn't support writing capture files in that format.";
3971 case WTAP_ERR_UNSUPPORTED_ENCAP:
3973 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3974 "TShark can't save this capture as a \"%s\" file.",
3975 wtap_file_type_short_string(file_type));
3977 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3978 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3982 errmsg = errmsg_errno;
3985 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3987 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3988 "TShark can't save this capture as a \"%s\" file.",
3989 wtap_file_type_short_string(file_type));
3990 errmsg = errmsg_errno;
3992 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3995 case WTAP_ERR_BAD_FILE:
3996 /* Seen only when opening a capture file for reading. */
3997 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3998 "The file \"%%s\" appears to be damaged or corrupt.\n"
4001 errmsg = errmsg_errno;
4004 case WTAP_ERR_CANT_OPEN:
4006 errmsg = "The file \"%s\" could not be created for some unknown reason.";
4008 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
4011 case WTAP_ERR_SHORT_READ:
4012 errmsg = "The file \"%s\" appears to have been cut short"
4013 " in the middle of a packet or other data.";
4016 case WTAP_ERR_SHORT_WRITE:
4017 errmsg = "A full header couldn't be written to the file \"%s\".";
4020 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
4021 errmsg = "This file type cannot be written as a compressed file.";
4024 case WTAP_ERR_DECOMPRESS:
4025 /* Seen only when opening a capture file for reading. */
4026 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4027 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
4030 errmsg = errmsg_errno;
4034 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4035 "The file \"%%s\" could not be %s: %s.",
4036 for_writing ? "created" : "opened",
4037 wtap_strerror(err));
4038 errmsg = errmsg_errno;
4042 errmsg = file_open_error_message(err, for_writing);
4047 * Open/create errors are reported with an console message in TShark.
4050 open_failure_message(const char *filename, int err, gboolean for_writing)
4052 fprintf(stderr, "tshark: ");
4053 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4054 fprintf(stderr, "\n");
4059 * General errors are reported with an console message in TShark.
4062 failure_message(const char *msg_format, va_list ap)
4064 fprintf(stderr, "tshark: ");
4065 vfprintf(stderr, msg_format, ap);
4066 fprintf(stderr, "\n");
4070 * Read errors are reported with an console message in TShark.
4073 read_failure_message(const char *filename, int err)
4075 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4076 filename, g_strerror(err));
4080 * Write errors are reported with an console message in TShark.
4083 write_failure_message(const char *filename, int err)
4085 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4086 filename, g_strerror(err));
4090 * Report an error in command-line arguments.
4093 cmdarg_err(const char *fmt, ...)
4098 failure_message(fmt, ap);
4103 * Report additional information for an error in command-line arguments.
4106 cmdarg_err_cont(const char *fmt, ...)
4111 vfprintf(stderr, fmt, ap);
4112 fprintf(stderr, "\n");
4118 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4123 * indent-tabs-mode: nil
4126 * vi: set shiftwidth=2 tabstop=8 expandtab:
4127 * :indentSize=2:tabSize=8:noTabs=true: