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, epan_dissect_t *edt, gint64 offset,
180 struct wtap_pkthdr *whdr, const guchar *pd,
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, _ws.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");
356 fprintf(output, "\n");
357 fprintf(output, "WARNING: dumpcap will enable kernel BPF JIT compiler if available.\n");
358 fprintf(output, "You might want to reset it\n");
359 fprintf(output, "By doing \"echo 0 > /proc/sys/net/core/bpf_jit_enable\"\n");
360 fprintf(output, "\n");
366 glossary_option_help(void)
372 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
374 fprintf(output, "\n");
375 fprintf(output, "Usage: tshark -G [report]\n");
376 fprintf(output, "\n");
377 fprintf(output, "Glossary table reports:\n");
378 fprintf(output, " -G column-formats dump column format codes and exit\n");
379 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
380 fprintf(output, " -G fields dump fields glossary and exit\n");
381 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
382 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
383 fprintf(output, " -G plugins dump installed plugins and exit\n");
384 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
385 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
386 fprintf(output, "\n");
387 fprintf(output, "Preference reports:\n");
388 fprintf(output, " -G currentprefs dump current preferences and exit\n");
389 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
390 fprintf(output, "\n");
394 * For a dissector table, print on the stream described by output,
395 * its short name (which is what's used in the "-d" option) and its
399 display_dissector_table_names(const char *table_name, const char *ui_name,
402 if ((prev_display_dissector_name == NULL) ||
403 (strcmp(prev_display_dissector_name, table_name) != 0)) {
404 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
405 prev_display_dissector_name = table_name;
410 * For a dissector handle, print on the stream described by output,
411 * the filter name (which is what's used in the "-d" option) and the full
412 * name for the protocol that corresponds to this handle.
415 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
418 const gchar *proto_filter_name;
419 const gchar *proto_ui_name;
421 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
423 if (proto_id != -1) {
424 proto_filter_name = proto_get_protocol_filter_name(proto_id);
425 proto_ui_name = proto_get_protocol_name(proto_id);
426 g_assert(proto_filter_name != NULL);
427 g_assert(proto_ui_name != NULL);
429 if ((prev_display_dissector_name == NULL) ||
430 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
431 fprintf((FILE *)output, "\t%s (%s)\n",
434 prev_display_dissector_name = proto_filter_name;
440 * The protocol_name_search structure is used by find_protocol_name_func()
441 * to pass parameters and store results
443 struct protocol_name_search{
444 gchar *searched_name; /* Protocol filter name we are looking for */
445 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
446 guint nb_match; /* How many dissectors matched searched_name */
448 typedef struct protocol_name_search *protocol_name_search_t;
451 * This function parses all dissectors associated with a table to find the
452 * one whose protocol has the specified filter name. It is called
453 * as a reference function in a call to dissector_table_foreach_handle.
454 * The name we are looking for, as well as the results, are stored in the
455 * protocol_name_search struct pointed to by user_data.
456 * If called using dissector_table_foreach_handle, we actually parse the
457 * whole list of dissectors.
460 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
464 const gchar *protocol_filter_name;
465 protocol_name_search_t search_info;
469 search_info = (protocol_name_search_t)user_data;
471 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
472 if (proto_id != -1) {
473 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
474 g_assert(protocol_filter_name != NULL);
475 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
477 if (search_info->nb_match == 0) {
478 /* Record this handle only if this is the first match */
479 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
481 search_info->nb_match++;
487 * Allow dissector key names to be sorted alphabetically
491 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
493 return strcmp((const char*)dissector_a, (const char*)dissector_b);
497 * Print all layer type names supported.
498 * We send the output to the stream described by the handle output.
502 fprint_all_layer_types(FILE *output)
505 prev_display_dissector_name = NULL;
506 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
510 * Print all protocol names supported for a specific layer type.
511 * table_name contains the layer type name in which the search is performed.
512 * We send the output to the stream described by the handle output.
516 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
519 prev_display_dissector_name = NULL;
520 dissector_table_foreach_handle(table_name,
521 display_dissector_names,
526 * The function below parses the command-line parameters for the decode as
527 * feature (a string pointer by cl_param).
528 * It checks the format of the command-line, searches for a matching table
529 * and dissector. If a table/dissector match is not found, we display a
530 * summary of the available tables/dissectors (on stderr) and return FALSE.
531 * If everything is fine, we get the "Decode as" preference activated,
532 * then we return TRUE.
535 add_decode_as(const gchar *cl_param)
538 guint32 selector, selector2;
539 gchar *decoded_param;
540 gchar *remaining_param;
542 gchar *dissector_str;
543 dissector_handle_t dissector_matching;
544 dissector_table_t table_matching;
545 ftenum_t dissector_table_selector_type;
546 struct protocol_name_search user_protocol_name;
550 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
553 decoded_param = g_strdup(cl_param);
554 g_assert(decoded_param);
557 /* The lines below will parse this string (modifying it) to extract all
558 necessary information. Note that decoded_param is still needed since
559 strings are not copied - we just save pointers. */
561 /* This section extracts a layer type (table_name) from decoded_param */
562 table_name = decoded_param; /* Layer type string starts from beginning */
564 remaining_param = strchr(table_name, '=');
565 if (remaining_param == NULL) {
566 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
567 /* If the argument does not follow the template, carry on anyway to check
568 if the table name is at least correct. If remaining_param is NULL,
569 we'll exit anyway further down */
572 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
575 /* Remove leading and trailing spaces from the table name */
576 while ( table_name[0] == ' ' )
578 while ( table_name[strlen(table_name) - 1] == ' ' )
579 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
581 /* The following part searches a table matching with the layer type specified */
582 table_matching = NULL;
584 /* Look for the requested table */
585 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
586 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
589 table_matching = find_dissector_table(table_name);
590 if (!table_matching) {
591 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
595 if (!table_matching) {
596 /* Display a list of supported layer types to help the user, if the
597 specified layer type was not found */
598 cmdarg_err("Valid layer types are:");
599 fprint_all_layer_types(stderr);
601 if (remaining_param == NULL || !table_matching) {
602 /* Exit if the layer type was not found, or if no '=' separator was found
604 g_free(decoded_param);
608 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
609 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
612 remaining_param++; /* Move to the second '=' */
613 *remaining_param = '\0'; /* Remove the second '=' */
615 remaining_param++; /* Position after the layer type string */
617 /* This section extracts a selector value (selector_str) from decoded_param */
619 selector_str = remaining_param; /* Next part starts with the selector number */
621 remaining_param = strchr(selector_str, ',');
622 if (remaining_param == NULL) {
623 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
624 /* If the argument does not follow the template, carry on anyway to check
625 if the selector value is at least correct. If remaining_param is NULL,
626 we'll exit anyway further down */
629 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
632 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
634 switch (dissector_table_selector_type) {
640 /* The selector for this table is an unsigned number. Parse it as such.
641 There's no need to remove leading and trailing spaces from the
642 selector number string, because sscanf will do that for us. */
643 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
648 if (op != ':' && op != '-') {
649 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
650 g_free(decoded_param);
654 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
655 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
656 g_free(decoded_param);
660 else if (selector2 < selector) {
661 /* We could swap them for the user, but maybe it's better to call
662 * this out as an error in case it's not what was intended? */
663 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
664 g_free(decoded_param);
669 cmdarg_err("Invalid selector number \"%s\"", selector_str);
670 g_free(decoded_param);
677 /* The selector for this table is a string. */
681 /* There are currently no dissector tables with any types other
682 than the ones listed above. */
683 g_assert_not_reached();
686 if (remaining_param == NULL) {
687 /* Exit if no ',' separator was found (see above) */
688 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
689 fprint_all_protocols_for_layer_types(stderr, table_name);
690 g_free(decoded_param);
694 remaining_param++; /* Position after the selector number string */
696 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
698 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
700 /* Remove leading and trailing spaces from the dissector name */
701 while ( dissector_str[0] == ' ' )
703 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
704 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
706 dissector_matching = NULL;
708 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
709 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 */
710 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
713 user_protocol_name.nb_match = 0;
714 user_protocol_name.searched_name = dissector_str;
715 user_protocol_name.matched_handle = NULL;
717 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 */
719 if (user_protocol_name.nb_match != 0) {
720 dissector_matching = user_protocol_name.matched_handle;
721 if (user_protocol_name.nb_match > 1) {
722 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
726 /* OK, check whether the problem is that there isn't any such
727 protocol, or that there is but it's not specified as a protocol
728 that's valid for that dissector table.
729 Note, we don't exit here, but dissector_matching will remain NULL,
731 if (proto_get_id_by_filter_name(dissector_str) == -1) {
732 /* No such protocol */
733 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
735 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
736 dissector_str, table_name);
741 if (!dissector_matching) {
742 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
743 fprint_all_protocols_for_layer_types(stderr, table_name);
744 g_free(decoded_param);
748 /* This is the end of the code that parses the command-line options.
749 All information is now stored in the variables:
753 The above variables that are strings are still pointing to areas within
754 decoded_parm. decoded_parm thus still needs to be kept allocated in
755 until we stop needing these variables
756 decoded_param will be deallocated at each exit point of this function */
759 /* We now have a pointer to the handle for the requested dissector
760 (requested protocol) inside the variable dissector_matching */
761 switch (dissector_table_selector_type) {
767 /* The selector for this table is an unsigned number. */
769 dissector_change_uint(table_name, selector, dissector_matching);
770 } else if (op == ':') {
771 for (i = selector; i < (guint64)selector + selector2; i++) {
772 dissector_change_uint(table_name, (guint32)i, dissector_matching);
774 } else { /* op == '-' */
775 for (i = selector; i <= selector2; i++) {
776 dissector_change_uint(table_name, (guint32)i, dissector_matching);
783 /* The selector for this table is a string. */
784 dissector_change_string(table_name, selector_str, dissector_matching);
788 /* There are currently no dissector tables with any types other
789 than the ones listed above. */
790 g_assert_not_reached();
792 g_free(decoded_param); /* "Decode As" rule has been successfully added */
797 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
798 const gchar *message, gpointer user_data)
800 /* ignore log message, if log_level isn't interesting based
801 upon the console log preferences.
802 If the preferences haven't been loaded loaded yet, display the
805 The default console_log_level preference value is such that only
806 ERROR, CRITICAL and WARNING level messages are processed;
807 MESSAGE, INFO and DEBUG level messages are ignored.
809 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
810 ERROR and CRITICAL level messages so the current code is a behavioral
811 change. The current behavior is the same as in Wireshark.
813 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
814 prefs.console_log_level != 0) {
818 g_log_default_handler(log_domain, log_level, message, user_data);
823 output_file_description(const char *fname)
825 char *save_file_string;
827 /* Get a string that describes what we're writing to */
828 if (strcmp(fname, "-") == 0) {
829 /* We're writing to the standard output */
830 save_file_string = g_strdup("standard output");
832 /* We're writing to a file with the name in save_file */
833 save_file_string = g_strdup_printf("file \"%s\"", fname);
835 return save_file_string;
839 print_current_user(void) {
840 gchar *cur_user, *cur_group;
842 if (started_with_special_privs()) {
843 cur_user = get_cur_username();
844 cur_group = get_cur_groupname();
845 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
846 cur_user, cur_group);
849 if (running_with_special_privs()) {
850 fprintf(stderr, " This could be dangerous.");
852 fprintf(stderr, "\n");
857 check_capture_privs(void) {
860 /* Warn the user if npf.sys isn't loaded. */
861 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
862 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
863 "capturing or\nlisting interfaces.\n");
869 show_version(GString *comp_info_str, GString *runtime_info_str)
871 printf("TShark " VERSION "%s\n"
878 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
879 runtime_info_str->str);
883 main(int argc, char *argv[])
885 GString *comp_info_str;
886 GString *runtime_info_str;
887 char *init_progfile_dir_error;
889 struct option long_options[] = {
890 {(char *)"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
893 gboolean arg_error = FALSE;
899 char *gpf_path, *pf_path;
900 char *gdp_path, *dp_path;
901 int gpf_open_errno, gpf_read_errno;
902 int pf_open_errno, pf_read_errno;
903 int gdp_open_errno, gdp_read_errno;
904 int dp_open_errno, dp_read_errno;
906 volatile int exit_status = 0;
908 gboolean list_link_layer_types = FALSE;
909 gboolean start_capture = FALSE;
914 gboolean capture_option_specified = FALSE;
916 gboolean quiet = FALSE;
917 #ifdef PCAP_NG_DEFAULT
918 volatile int out_file_type = WTAP_FILE_PCAPNG;
920 volatile int out_file_type = WTAP_FILE_PCAP;
922 volatile gboolean out_file_name_res = FALSE;
923 gchar *volatile cf_name = NULL;
924 gchar *rfilter = NULL;
925 gchar *dfilter = NULL;
926 #ifdef HAVE_PCAP_OPEN_DEAD
927 struct bpf_program fcode;
929 dfilter_t *rfcode = NULL;
930 dfilter_t *dfcode = NULL;
935 gchar *output_only = NULL;
937 #ifdef HAVE_PCAP_REMOTE
938 #define OPTSTRING_A "A:"
940 #define OPTSTRING_A ""
943 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
944 #define OPTSTRING_B "B:"
946 #define OPTSTRING_B ""
947 #endif /* _WIN32 or HAVE_PCAP_CREATE */
948 #else /* HAVE_LIBPCAP */
949 #define OPTSTRING_B ""
950 #endif /* HAVE_LIBPCAP */
952 #ifdef HAVE_PCAP_CREATE
953 #define OPTSTRING_I "I"
955 #define OPTSTRING_I ""
958 /* the leading - ensures that getopt() does not permute the argv[] entries
959 we have to make sure that the first getopt() preserves the content of argv[]
960 for the subsequent getopt_long() call */
961 #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:"
963 static const char optstring[] = OPTSTRING;
965 /* Assemble the compile-time version information string */
966 comp_info_str = g_string_new("Compiled ");
967 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
969 /* Assemble the run-time version information string */
970 runtime_info_str = g_string_new("Running ");
971 get_runtime_version_info(runtime_info_str, NULL);
973 /* Add it to the information to be reported on a crash. */
974 ws_add_crash_info("TShark " VERSION "%s\n"
979 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
982 arg_list_utf_16to8(argc, argv);
983 create_app_running_mutex();
984 #if !GLIB_CHECK_VERSION(2,31,0)
990 * Get credential information for later use.
992 init_process_policies();
995 * Attempt to get the pathname of the executable file.
997 init_progfile_dir_error = init_progfile_dir(argv[0], main);
998 if (init_progfile_dir_error != NULL) {
999 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
1000 init_progfile_dir_error);
1004 * In order to have the -X opts assigned before the wslua machine starts
1005 * we need to call getopts before epan_init() gets called.
1008 optind_initial = optind;
1010 while ((opt = getopt(argc, argv, optstring)) != -1) {
1012 case 'C': /* Configuration Profile */
1013 if (profile_exists (optarg, FALSE)) {
1014 set_profile_name (optarg);
1016 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1020 case 'P': /* Print packet summary info even when writing to a file */
1021 print_packet_info = TRUE;
1022 print_summary = TRUE;
1024 case 'O': /* Only output these protocols */
1025 output_only = g_strdup(optarg);
1027 case 'V': /* Verbose */
1028 print_details = TRUE;
1029 print_packet_info = TRUE;
1031 case 'x': /* Print packet data in hex (and ASCII) */
1033 /* The user asked for hex output, so let's ensure they get it,
1034 * even if they're writing to a file.
1036 print_packet_info = TRUE;
1047 * Print packet summary information is the default, unless either -V or -x
1048 * were specified and -P was not. Note that this is new behavior, which
1049 * allows for the possibility of printing only hex/ascii output without
1050 * necessarily requiring that either the summary or details be printed too.
1052 if (print_summary == -1)
1053 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1055 optind = optind_initial;
1060 /** Send All g_log messages to our own handler **/
1064 G_LOG_LEVEL_CRITICAL|
1065 G_LOG_LEVEL_WARNING|
1066 G_LOG_LEVEL_MESSAGE|
1069 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1071 g_log_set_handler(NULL,
1072 (GLogLevelFlags)log_flags,
1073 tshark_log_handler, NULL /* user_data */);
1074 g_log_set_handler(LOG_DOMAIN_MAIN,
1075 (GLogLevelFlags)log_flags,
1076 tshark_log_handler, NULL /* user_data */);
1079 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1080 (GLogLevelFlags)log_flags,
1081 tshark_log_handler, NULL /* user_data */);
1082 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1083 (GLogLevelFlags)log_flags,
1084 tshark_log_handler, NULL /* user_data */);
1087 initialize_funnel_ops();
1090 capture_opts_init(&global_capture_opts);
1091 capture_session_init(&global_capture_session, (void *)&cfile);
1094 timestamp_set_type(TS_RELATIVE);
1095 timestamp_set_precision(TS_PREC_AUTO);
1096 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1098 /* Register all dissectors; we must do this before checking for the
1099 "-G" flag, as the "-G" flag dumps information registered by the
1100 dissectors, and we must do it before we read the preferences, in
1101 case any dissectors register preferences. */
1102 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1103 failure_message, open_failure_message, read_failure_message,
1104 write_failure_message);
1106 /* Register all tap listeners; we do this before we parse the arguments,
1107 as the "-z" argument can specify a registered tap. */
1109 /* we register the plugin taps before the other taps because
1110 stats_tree taps plugins will be registered as tap listeners
1111 by stats_tree_stat.c and need to registered before that */
1113 register_all_plugin_tap_listeners();
1115 register_all_tap_listeners();
1117 /* If invoked with the "-G" flag, we dump out information based on
1118 the argument to the "-G" flag; if no argument is specified,
1119 for backwards compatibility we dump out a glossary of display
1122 XXX - we do this here, for now, to support "-G" with no arguments.
1123 If none of our build or other processes uses "-G" with no arguments,
1124 we can just process it with the other arguments. */
1125 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1126 proto_initialize_all_prefixes();
1129 proto_registrar_dump_fields();
1131 if (strcmp(argv[2], "column-formats") == 0)
1132 column_dump_column_formats();
1133 else if (strcmp(argv[2], "currentprefs") == 0) {
1134 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1135 &pf_open_errno, &pf_read_errno, &pf_path);
1138 else if (strcmp(argv[2], "decodes") == 0)
1139 dissector_dump_decodes();
1140 else if (strcmp(argv[2], "defaultprefs") == 0)
1142 else if (strcmp(argv[2], "fields") == 0)
1143 proto_registrar_dump_fields();
1144 else if (strcmp(argv[2], "ftypes") == 0)
1145 proto_registrar_dump_ftypes();
1146 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1147 dissector_dump_heur_decodes();
1148 else if (strcmp(argv[2], "plugins") == 0)
1150 else if (strcmp(argv[2], "protocols") == 0)
1151 proto_registrar_dump_protocols();
1152 else if (strcmp(argv[2], "values") == 0)
1153 proto_registrar_dump_values();
1154 else if (strcmp(argv[2], "?") == 0)
1155 glossary_option_help();
1156 else if (strcmp(argv[2], "-?") == 0)
1157 glossary_option_help();
1159 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1166 /* Set the C-language locale to the native environment. */
1167 setlocale(LC_ALL, "");
1169 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1170 &pf_open_errno, &pf_read_errno, &pf_path);
1171 if (gpf_path != NULL) {
1172 if (gpf_open_errno != 0) {
1173 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1174 pf_path, g_strerror(gpf_open_errno));
1176 if (gpf_read_errno != 0) {
1177 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1178 pf_path, g_strerror(gpf_read_errno));
1181 if (pf_path != NULL) {
1182 if (pf_open_errno != 0) {
1183 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1184 g_strerror(pf_open_errno));
1186 if (pf_read_errno != 0) {
1187 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1188 pf_path, g_strerror(pf_read_errno));
1194 /* Read the disabled protocols file. */
1195 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1196 &dp_path, &dp_open_errno, &dp_read_errno);
1197 if (gdp_path != NULL) {
1198 if (gdp_open_errno != 0) {
1199 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1200 gdp_path, g_strerror(gdp_open_errno));
1202 if (gdp_read_errno != 0) {
1203 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1204 gdp_path, g_strerror(gdp_read_errno));
1208 if (dp_path != NULL) {
1209 if (dp_open_errno != 0) {
1211 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1212 g_strerror(dp_open_errno));
1214 if (dp_read_errno != 0) {
1216 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1217 g_strerror(dp_read_errno));
1222 check_capture_privs();
1224 cap_file_init(&cfile);
1226 /* Print format defaults to this. */
1227 print_format = PR_FMT_TEXT;
1229 output_fields = output_fields_new();
1231 /* Now get our args */
1232 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1234 case '2': /* Perform two pass analysis */
1235 perform_two_pass_analysis = TRUE;
1237 case 'a': /* autostop criteria */
1238 case 'b': /* Ringbuffer option */
1239 case 'c': /* Capture x packets */
1240 case 'f': /* capture filter */
1241 case 'g': /* enable group read access on file(s) */
1242 case 'i': /* Use interface x */
1243 case 'p': /* Don't capture in promiscuous mode */
1244 #ifdef HAVE_PCAP_REMOTE
1245 case 'A': /* Authentication */
1247 #ifdef HAVE_PCAP_CREATE
1248 case 'I': /* Capture in monitor mode, if available */
1250 case 's': /* Set the snapshot (capture) length */
1251 case 'w': /* Write to capture file x */
1252 case 'y': /* Set the pcap data link type */
1253 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1254 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1255 case 'B': /* Buffer size */
1256 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1258 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1263 capture_option_specified = TRUE;
1268 /* Configuration profile settings were already processed just ignore them this time*/
1270 case 'd': /* Decode as rule */
1271 if (!add_decode_as(optarg))
1274 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1275 case 'K': /* Kerberos keytab file */
1276 read_keytab_file(optarg);
1279 case 'D': /* Print a list of capture devices and exit */
1281 if_list = capture_interface_list(&err, &err_str,NULL);
1282 if (if_list == NULL) {
1284 case CANT_GET_INTERFACE_LIST:
1285 case DONT_HAVE_PCAP:
1286 cmdarg_err("%s", err_str);
1290 case NO_INTERFACES_FOUND:
1291 cmdarg_err("There are no interfaces on which a capture can be done");
1296 capture_opts_print_interfaces(if_list);
1297 free_interface_list(if_list);
1300 capture_option_specified = TRUE;
1306 output_fields_add(output_fields, optarg);
1310 if (!output_fields_set_option(output_fields, optarg)) {
1311 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1312 output_fields_list_options(stderr);
1317 out_file_type = wtap_short_string_to_file_type(optarg);
1318 if (out_file_type < 0) {
1319 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1320 list_capture_types();
1324 case 'W': /* Select extra information to save in our capture file */
1325 /* This is patterned after the -N flag which may not be the best idea. */
1326 if (strchr(optarg, 'n')) {
1327 out_file_name_res = TRUE;
1329 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1333 case 'H': /* Read address to name mappings from a hosts file */
1334 if (! add_hosts_file(optarg))
1336 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1339 out_file_name_res = TRUE;
1342 case 'h': /* Print help and exit */
1346 case 'l': /* "Line-buffer" standard output */
1347 /* This isn't line-buffering, strictly speaking, it's just
1348 flushing the standard output after the information for
1349 each packet is printed; however, that should be good
1350 enough for all the purposes to which "-l" is put (and
1351 is probably actually better for "-V", as it does fewer
1354 See the comment in "process_packet()" for an explanation of
1355 why we do that, and why we don't just use "setvbuf()" to
1356 make the standard output line-buffered (short version: in
1357 Windows, "line-buffered" is the same as "fully-buffered",
1358 and the output buffer is only flushed when it fills up). */
1359 line_buffered = TRUE;
1361 case 'L': /* Print list of link-layer types and exit */
1363 list_link_layer_types = TRUE;
1365 capture_option_specified = TRUE;
1369 case 'n': /* No name resolution */
1370 gbl_resolv_flags.mac_name = FALSE;
1371 gbl_resolv_flags.network_name = FALSE;
1372 gbl_resolv_flags.transport_name = FALSE;
1373 gbl_resolv_flags.concurrent_dns = FALSE;
1375 case 'N': /* Select what types of addresses/port #s to resolve */
1376 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1377 if (badopt != '\0') {
1378 cmdarg_err("-N specifies unknown resolving option '%c';",
1380 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1384 case 'o': /* Override preference from command line */
1385 switch (prefs_set_pref(optarg)) {
1390 case PREFS_SET_SYNTAX_ERR:
1391 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1395 case PREFS_SET_NO_SUCH_PREF:
1396 case PREFS_SET_OBSOLETE:
1397 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1402 case 'q': /* Quiet */
1405 case 'Q': /* Really quiet */
1407 really_quiet = TRUE;
1409 case 'r': /* Read capture file x */
1410 cf_name = g_strdup(optarg);
1412 case 'R': /* Read file filter */
1416 /* already processed; just ignore it now */
1418 case 'S': /* Set the line Separator to be printed between packets */
1419 separator = strdup(optarg);
1421 case 't': /* Time stamp type */
1422 if (strcmp(optarg, "r") == 0)
1423 timestamp_set_type(TS_RELATIVE);
1424 else if (strcmp(optarg, "a") == 0)
1425 timestamp_set_type(TS_ABSOLUTE);
1426 else if (strcmp(optarg, "ad") == 0)
1427 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1428 else if (strcmp(optarg, "d") == 0)
1429 timestamp_set_type(TS_DELTA);
1430 else if (strcmp(optarg, "dd") == 0)
1431 timestamp_set_type(TS_DELTA_DIS);
1432 else if (strcmp(optarg, "e") == 0)
1433 timestamp_set_type(TS_EPOCH);
1434 else if (strcmp(optarg, "u") == 0)
1435 timestamp_set_type(TS_UTC);
1436 else if (strcmp(optarg, "ud") == 0)
1437 timestamp_set_type(TS_UTC_WITH_DATE);
1439 cmdarg_err("Invalid time stamp type \"%s\"",
1441 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1442 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1443 cmdarg_err_cont("or \"ud\" for UTC with date.");
1447 case 'T': /* printing Type */
1448 if (strcmp(optarg, "text") == 0) {
1449 output_action = WRITE_TEXT;
1450 print_format = PR_FMT_TEXT;
1451 } else if (strcmp(optarg, "ps") == 0) {
1452 output_action = WRITE_TEXT;
1453 print_format = PR_FMT_PS;
1454 } else if (strcmp(optarg, "pdml") == 0) {
1455 output_action = WRITE_XML;
1456 print_details = TRUE; /* Need details */
1457 print_summary = FALSE; /* Don't allow summary */
1458 } else if (strcmp(optarg, "psml") == 0) {
1459 output_action = WRITE_XML;
1460 print_details = FALSE; /* Don't allow details */
1461 print_summary = TRUE; /* Need summary */
1462 } else if (strcmp(optarg, "fields") == 0) {
1463 output_action = WRITE_FIELDS;
1464 print_details = TRUE; /* Need full tree info */
1465 print_summary = FALSE; /* Don't allow summary */
1467 cmdarg_err("Invalid -T parameter.");
1468 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1472 case 'u': /* Seconds type */
1473 if (strcmp(optarg, "s") == 0)
1474 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1475 else if (strcmp(optarg, "hms") == 0)
1476 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1478 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1479 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1483 case 'v': /* Show version and exit */
1485 show_version(comp_info_str, runtime_info_str);
1486 g_string_free(comp_info_str, TRUE);
1487 g_string_free(runtime_info_str, TRUE);
1488 /* We don't really have to cleanup here, but it's a convenient way to test
1489 * start-up and shut-down of the epan library without any UI-specific
1490 * cruft getting in the way. Makes the results of running
1491 * $ ./tools/valgrind-wireshark -n
1492 * much more useful. */
1496 case 'O': /* Only output these protocols */
1497 /* already processed; just ignore it now */
1499 case 'V': /* Verbose */
1500 /* already processed; just ignore it now */
1502 case 'x': /* Print packet data in hex (and ASCII) */
1503 /* already processed; just ignore it now */
1511 /* We won't call the init function for the stat this soon
1512 as it would disallow MATE's fields (which are registered
1513 by the preferences set callback) from being used as
1514 part of a tap filter. Instead, we just add the argument
1515 to a list of stat arguments. */
1516 if (!process_stat_cmd_arg(optarg)) {
1517 if (strcmp("help", optarg)==0) {
1518 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1519 list_stat_cmd_args();
1522 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1523 cmdarg_err_cont(" -z argument must be one of :");
1524 list_stat_cmd_args();
1529 case '?': /* Bad flag - print usage message */
1532 list_capture_types();
1542 /* If we specified output fields, but not the output field type... */
1543 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1544 cmdarg_err("Output fields were specified with \"-e\", "
1545 "but \"-Tfields\" was not specified.");
1547 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1548 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1549 "specified with \"-e\".");
1554 /* If no capture filter or display filter has been specified, and there are
1555 still command-line arguments, treat them as the tokens of a capture
1556 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1557 flag was specified. */
1558 if (optind < argc) {
1559 if (cf_name != NULL) {
1560 if (dfilter != NULL) {
1561 cmdarg_err("Display filters were specified both with \"-d\" "
1562 "and with additional command-line arguments.");
1565 dfilter = get_args_as_string(argc, argv, optind);
1570 if (global_capture_opts.default_options.cfilter) {
1571 cmdarg_err("A default capture filter was specified both with \"-f\""
1572 " and with additional command-line arguments.");
1575 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1576 interface_options interface_opts;
1577 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1578 if (interface_opts.cfilter == NULL) {
1579 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1580 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1581 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1583 cmdarg_err("A capture filter was specified both with \"-f\""
1584 " and with additional command-line arguments.");
1588 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1590 capture_option_specified = TRUE;
1596 if (!global_capture_opts.saving_to_file) {
1597 /* We're not saving the capture to a file; if "-q" wasn't specified,
1598 we should print packet information */
1600 print_packet_info = TRUE;
1602 /* We're saving to a file; if we're writing to the standard output.
1603 and we'll also be writing dissected packets to the standard
1604 output, reject the request. At best, we could redirect that
1605 to the standard error; we *can't* write both to the standard
1606 output and have either of them be useful. */
1607 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1608 cmdarg_err("You can't write both raw packet data and dissected packets"
1609 " to the standard output.");
1614 /* We're not saving the capture to a file; if "-q" wasn't specified,
1615 we should print packet information */
1617 print_packet_info = TRUE;
1620 #ifndef HAVE_LIBPCAP
1621 if (capture_option_specified)
1622 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1630 if (output_action != WRITE_TEXT) {
1631 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1636 if (output_only != NULL) {
1639 if (!print_details) {
1640 cmdarg_err("-O requires -V");
1644 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1645 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1646 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1650 if (rfilter != NULL && !perform_two_pass_analysis) {
1651 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1656 if (list_link_layer_types) {
1657 /* We're supposed to list the link-layer types for an interface;
1658 did the user also specify a capture file to be read? */
1660 /* Yes - that's bogus. */
1661 cmdarg_err("You can't specify -L and a capture file to be read.");
1664 /* No - did they specify a ring buffer option? */
1665 if (global_capture_opts.multi_files_on) {
1666 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1672 * "-r" was specified, so we're reading a capture file.
1673 * Capture options don't apply here.
1676 /* We don't support capture filters when reading from a capture file
1677 (the BPF compiler doesn't support all link-layer types that we
1678 support in capture files we read). */
1679 if (global_capture_opts.default_options.cfilter) {
1680 cmdarg_err("Only read filters, not capture filters, "
1681 "can be specified when reading a capture file.");
1684 if (global_capture_opts.multi_files_on) {
1685 cmdarg_err("Multiple capture files requested, but "
1686 "a capture isn't being done.");
1689 if (global_capture_opts.has_file_duration) {
1690 cmdarg_err("Switching capture files after a time interval was specified, but "
1691 "a capture isn't being done.");
1694 if (global_capture_opts.has_ring_num_files) {
1695 cmdarg_err("A ring buffer of capture files was specified, but "
1696 "a capture isn't being done.");
1699 if (global_capture_opts.has_autostop_files) {
1700 cmdarg_err("A maximum number of capture files was specified, but "
1701 "a capture isn't being done.");
1704 if (global_capture_opts.capture_comment) {
1705 cmdarg_err("A capture comment was specified, but "
1706 "a capture isn't being done.\nThere's no support for adding "
1707 "a capture comment to an existing capture file.");
1711 /* Note: TShark now allows the restriction of a _read_ file by packet count
1712 * and byte count as well as a write file. Other autostop options remain valid
1713 * only for a write file.
1715 if (global_capture_opts.has_autostop_duration) {
1716 cmdarg_err("A maximum capture time was specified, but "
1717 "a capture isn't being done.");
1722 * "-r" wasn't specified, so we're doing a live capture.
1724 if (global_capture_opts.saving_to_file) {
1725 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1727 /* When capturing, we only support writing pcap or pcap-ng format. */
1728 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1729 cmdarg_err("Live captures can only be saved in libpcap format.");
1732 if (global_capture_opts.capture_comment && out_file_type != WTAP_FILE_PCAPNG) {
1733 cmdarg_err("A capture comment can only be written to a pcapng file.");
1736 if (global_capture_opts.multi_files_on) {
1737 /* Multiple-file mode doesn't work under certain conditions:
1738 a) it doesn't work if you're writing to the standard output;
1739 b) it doesn't work if you're writing to a pipe;
1741 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1742 cmdarg_err("Multiple capture files requested, but "
1743 "the capture is being written to the standard output.");
1746 if (global_capture_opts.output_to_pipe) {
1747 cmdarg_err("Multiple capture files requested, but "
1748 "the capture file is a pipe.");
1751 if (!global_capture_opts.has_autostop_filesize &&
1752 !global_capture_opts.has_file_duration) {
1753 cmdarg_err("Multiple capture files requested, but "
1754 "no maximum capture file size or duration was specified.");
1758 /* Currently, we don't support read or display filters when capturing
1759 and saving the packets. */
1760 if (rfilter != NULL) {
1761 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1764 if (dfilter != NULL) {
1765 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1769 /* They didn't specify a "-w" flag, so we won't be saving to a
1770 capture file. Check for options that only make sense if
1771 we're saving to a file. */
1772 if (global_capture_opts.has_autostop_filesize) {
1773 cmdarg_err("Maximum capture file size specified, but "
1774 "capture isn't being saved to a file.");
1777 if (global_capture_opts.multi_files_on) {
1778 cmdarg_err("Multiple capture files requested, but "
1779 "the capture isn't being saved to a file.");
1782 if (global_capture_opts.capture_comment) {
1783 cmdarg_err("A capture comment was specified, but "
1784 "the capture isn't being saved to a file.");
1793 /* Start windows sockets */
1794 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1797 /* Notify all registered modules that have had any of their preferences
1798 changed either from one of the preferences file or from the command
1799 line that their preferences have changed. */
1802 /* At this point MATE will have registered its field array so we can
1803 have a tap filter with one of MATE's late-registered fields as part
1804 of the filter. We can now process all the "-z" arguments. */
1805 start_requested_stats();
1808 /* We currently don't support taps, or printing dissected packets,
1809 if we're writing to a pipe. */
1810 if (global_capture_opts.saving_to_file &&
1811 global_capture_opts.output_to_pipe) {
1812 if (tap_listeners_require_dissection()) {
1813 cmdarg_err("Taps aren't supported when saving to a pipe.");
1816 if (print_packet_info) {
1817 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1823 /* disabled protocols as per configuration file */
1824 if (gdp_path == NULL && dp_path == NULL) {
1825 set_disabled_protos_list();
1828 /* Build the column format array */
1829 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1832 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1833 capture_opts_trim_ring_num_files(&global_capture_opts);
1836 if (rfilter != NULL) {
1837 if (!dfilter_compile(rfilter, &rfcode)) {
1838 cmdarg_err("%s", dfilter_error_msg);
1840 #ifdef HAVE_PCAP_OPEN_DEAD
1844 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1846 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1848 " Note: That read filter code looks like a valid capture filter;");
1850 " maybe you mixed them up?");
1859 cfile.rfcode = rfcode;
1861 if (dfilter != NULL) {
1862 if (!dfilter_compile(dfilter, &dfcode)) {
1863 cmdarg_err("%s", dfilter_error_msg);
1865 #ifdef HAVE_PCAP_OPEN_DEAD
1869 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1871 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1873 " Note: That display filter code looks like a valid capture filter;");
1875 " maybe you mixed them up?");
1884 cfile.dfcode = dfcode;
1886 if (print_packet_info) {
1887 /* If we're printing as text or PostScript, we have
1888 to create a print stream. */
1889 if (output_action == WRITE_TEXT) {
1890 switch (print_format) {
1893 print_stream = print_stream_text_stdio_new(stdout);
1897 print_stream = print_stream_ps_stdio_new(stdout);
1901 g_assert_not_reached();
1906 /* We have to dissect each packet if:
1908 we're printing information about each packet;
1910 we're using a read filter on the packets;
1912 we're using a display filter on the packets;
1914 we're using any taps that need dissection. */
1915 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1919 * We're reading a capture file.
1923 * Immediately relinquish any special privileges we have; we must not
1924 * be allowed to read any capture files the user running TShark
1927 relinquish_special_privs_perm();
1928 print_current_user();
1930 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1935 /* Set timestamp precision; there should arguably be a command-line
1936 option to let the user set this. */
1937 switch(wtap_file_tsprecision(cfile.wth)) {
1938 case(WTAP_FILE_TSPREC_SEC):
1939 timestamp_set_precision(TS_PREC_AUTO_SEC);
1941 case(WTAP_FILE_TSPREC_DSEC):
1942 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1944 case(WTAP_FILE_TSPREC_CSEC):
1945 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1947 case(WTAP_FILE_TSPREC_MSEC):
1948 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1950 case(WTAP_FILE_TSPREC_USEC):
1951 timestamp_set_precision(TS_PREC_AUTO_USEC);
1953 case(WTAP_FILE_TSPREC_NSEC):
1954 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1957 g_assert_not_reached();
1960 /* Process the packets in the file */
1963 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1964 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1965 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1967 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1970 CATCH(OutOfMemoryError) {
1974 "Sorry, but TShark has to terminate now!\n"
1976 "Some infos / workarounds can be found at:\n"
1977 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1982 /* We still dump out the results of taps, etc., as we might have
1983 read some packets; however, we exit with an error status. */
1987 /* No capture file specified, so we're supposed to do a live capture
1988 or get a list of link-layer types for a live capture device;
1989 do we have support for live captures? */
1991 /* if no interface was specified, pick a default */
1992 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1993 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1994 if (exit_status != 0)
1997 /* if requested, list the link layer types and exit */
1998 if (list_link_layer_types) {
2001 /* Get the list of link-layer types for the capture devices. */
2002 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2003 interface_options interface_opts;
2004 if_capabilities_t *caps;
2006 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2007 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
2009 cmdarg_err("%s", err_str);
2013 if (caps->data_link_types == NULL) {
2014 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
2017 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
2018 free_if_capabilities(caps);
2024 * If the standard error isn't a terminal, don't print packet counts,
2025 * as they won't show up on the user's terminal and they'll get in
2026 * the way of error messages in the file (to which we assume the
2027 * standard error was redirected; if it's redirected to the null
2028 * device, there's no point in printing packet counts anyway).
2030 * Otherwise, if we're printing packet information and the standard
2031 * output is a terminal (which we assume means the standard output and
2032 * error are going to the same terminal), don't print packet counts,
2033 * as they'll get in the way of the packet information.
2035 * Otherwise, if the user specified -q, don't print packet counts.
2037 * Otherwise, print packet counts.
2039 * XXX - what if the user wants to do a live capture, doesn't want
2040 * to save it to a file, doesn't want information printed for each
2041 * packet, does want some "-z" statistic, and wants packet counts
2042 * so they know whether they're seeing any packets? -q will
2043 * suppress the information printed for each packet, but it'll
2044 * also suppress the packet counts.
2046 if (!isatty(fileno(stderr)))
2047 print_packet_counts = FALSE;
2048 else if (print_packet_info && isatty(fileno(stdout)))
2049 print_packet_counts = FALSE;
2051 print_packet_counts = FALSE;
2053 print_packet_counts = TRUE;
2055 if (print_packet_info) {
2056 if (!write_preamble(NULL)) {
2057 show_print_file_io_error(errno);
2062 /* For now, assume libpcap gives microsecond precision. */
2063 timestamp_set_precision(TS_PREC_AUTO_USEC);
2066 * XXX - this returns FALSE if an error occurred, but it also
2067 * returns FALSE if the capture stops because a time limit
2068 * was reached (and possibly other limits), so we can't assume
2069 * it means an error.
2071 * The capture code is a bit twisty, so it doesn't appear to
2072 * be an easy fix. We just ignore the return value for now.
2073 * Instead, pass on the exit status from the capture child.
2076 exit_status = global_capture_session.fork_child_status;
2078 if (print_packet_info) {
2079 if (!write_finale()) {
2081 show_print_file_io_error(err);
2085 /* No - complain. */
2086 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2093 if (cfile.frames != NULL) {
2094 free_frame_data_sequence(cfile.frames);
2095 cfile.frames = NULL;
2098 draw_tap_listeners(TRUE);
2099 funnel_dump_all_text_windows();
2100 epan_free(cfile.epan);
2103 output_fields_free(output_fields);
2104 output_fields = NULL;
2109 /*#define USE_BROKEN_G_MAIN_LOOP*/
2111 #ifdef USE_BROKEN_G_MAIN_LOOP
2114 gboolean loop_running = FALSE;
2116 guint32 packet_count = 0;
2119 /* XXX - move to the right position / file */
2120 /* read from a pipe (callback) */
2121 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2123 typedef struct pipe_input_tag {
2127 pipe_input_cb_t input_cb;
2128 guint pipe_input_id;
2130 GMutex *callback_running;
2134 static pipe_input_t pipe_input;
2137 /* The timer has expired, see if there's stuff to read from the pipe,
2138 if so, do the callback */
2140 pipe_timer_cb(gpointer data)
2146 pipe_input_t *pipe_input_p = data;
2147 gint iterations = 0;
2149 g_mutex_lock (pipe_input_p->callback_running);
2151 /* try to read data from the pipe only 5 times, to avoid blocking */
2152 while(iterations < 5) {
2153 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2155 /* Oddly enough although Named pipes don't work on win9x,
2156 PeekNamedPipe does !!! */
2157 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2158 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2160 /* Get the child process exit status */
2161 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2164 /* If the Peek returned an error, or there are bytes to be read
2165 or the childwatcher thread has terminated then call the normal
2167 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2169 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2171 /* And call the real handler */
2172 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2173 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2174 /* pipe closed, return false so that the timer is stopped */
2175 g_mutex_unlock (pipe_input_p->callback_running);
2180 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2181 /* No data, stop now */
2188 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2190 g_mutex_unlock (pipe_input_p->callback_running);
2192 /* we didn't stopped the timer, so let it run */
2199 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2202 pipe_input.source = source;
2203 pipe_input.child_process = child_process;
2204 pipe_input.user_data = user_data;
2205 pipe_input.input_cb = input_cb;
2208 #if GLIB_CHECK_VERSION(2,31,0)
2209 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2210 g_mutex_init(pipe_input.callback_running);
2212 pipe_input.callback_running = g_mutex_new();
2214 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2215 do this but that doesn't cover all win32 platforms. GTK can do
2216 this but doesn't seem to work over processes. Attempt to do
2217 something similar here, start a timer and check for data on every
2219 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2220 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2224 static const nstime_t *
2225 tshark_get_frame_ts(void *data, guint32 frame_num)
2227 capture_file *cf = (capture_file *) data;
2229 if (ref && ref->num == frame_num)
2230 return &ref->abs_ts;
2232 if (prev_dis && prev_dis->num == frame_num)
2233 return &prev_dis->abs_ts;
2235 if (prev_cap && prev_cap->num == frame_num)
2236 return &prev_cap->abs_ts;
2239 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2241 return (fd) ? &fd->abs_ts : NULL;
2248 tshark_epan_new(capture_file *cf)
2250 epan_t *epan = epan_new();
2253 epan->get_frame_ts = tshark_get_frame_ts;
2254 epan->get_interface_name = cap_file_get_interface_name;
2255 epan->get_user_comment = NULL;
2266 GString *str = g_string_new("");
2267 #ifdef USE_TSHARK_SELECT
2271 struct sigaction action, oldaction;
2275 * XXX - dropping privileges is still required, until code cleanup is done
2277 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2278 * when it's done, we don't need special privileges to run tshark at all,
2279 * therefore we don't need to drop these privileges
2280 * The only thing we might want to keep is a warning if tshark is run as root,
2281 * as it's no longer necessary and potentially dangerous.
2283 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2284 * We've opened the capture device, so we shouldn't need any special
2285 * privileges any more; relinquish those privileges.
2287 * XXX - if we have saved set-user-ID support, we should give up those
2288 * privileges immediately, and then reclaim them long enough to get
2289 * a list of network interfaces and to open one, and then give them
2290 * up again, so that stuff we do while processing the argument list,
2291 * reading the user's preferences, loading and starting plugins
2292 * (especially *user* plugins), etc. is done with the user's privileges,
2293 * not special privileges.
2295 relinquish_special_privs_perm();
2296 print_current_user();
2298 /* Create new dissection section. */
2299 epan_free(cfile.epan);
2300 cfile.epan = tshark_epan_new(&cfile);
2303 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2304 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2306 /* Catch SIGINT and SIGTERM and, if we get either of them,
2307 clean up and exit. If SIGHUP isn't being ignored, catch
2308 it too and, if we get it, clean up and exit.
2310 We restart any read that was in progress, so that it doesn't
2311 disrupt reading from the sync pipe. The signal handler tells
2312 the capture child to finish; it will report that it finished,
2313 or will exit abnormally, so we'll stop reading from the sync
2314 pipe, pick up the exit status, and quit. */
2315 memset(&action, 0, sizeof(action));
2316 action.sa_handler = capture_cleanup;
2317 action.sa_flags = SA_RESTART;
2318 sigemptyset(&action.sa_mask);
2319 sigaction(SIGTERM, &action, NULL);
2320 sigaction(SIGINT, &action, NULL);
2321 sigaction(SIGHUP, NULL, &oldaction);
2322 if (oldaction.sa_handler == SIG_DFL)
2323 sigaction(SIGHUP, &action, NULL);
2326 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2327 quiet mode, report the number of packets we've captured.
2329 Again, restart any read that was in progress, so that it doesn't
2330 disrupt reading from the sync pipe. */
2331 action.sa_handler = report_counts_siginfo;
2332 action.sa_flags = SA_RESTART;
2333 sigemptyset(&action.sa_mask);
2334 sigaction(SIGINFO, &action, NULL);
2335 #endif /* SIGINFO */
2338 global_capture_session.state = CAPTURE_PREPARING;
2340 /* Let the user know which interfaces were chosen. */
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);
2345 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2346 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2347 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2350 if (global_capture_opts.ifaces->len < 2)
2352 if (global_capture_opts.ifaces->len < 4)
2355 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2356 interface_options interface_opts;
2358 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2360 if (global_capture_opts.ifaces->len > 2) {
2361 g_string_append_printf(str, ",");
2363 g_string_append_printf(str, " ");
2364 if (i == global_capture_opts.ifaces->len - 1) {
2365 g_string_append_printf(str, "and ");
2368 g_string_append_printf(str, "'%s'", interface_opts.descr);
2371 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2373 if (really_quiet == FALSE)
2374 fprintf(stderr, "Capturing on %s\n", str->str);
2376 g_string_free(str, TRUE);
2378 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2383 /* the actual capture loop
2385 * XXX - glib doesn't seem to provide any event based loop handling.
2387 * XXX - for whatever reason,
2388 * calling g_main_loop_new() ends up in 100% cpu load.
2390 * But that doesn't matter: in UNIX we can use select() to find an input
2391 * source with something to do.
2393 * But that doesn't matter because we're in a CLI (that doesn't need to
2394 * update a GUI or something at the same time) so it's OK if we block
2395 * trying to read from the pipe.
2397 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2398 * wrong (but I leave it there in case I am...).
2401 #ifdef USE_TSHARK_SELECT
2403 FD_SET(pipe_input.source, &readfds);
2406 loop_running = TRUE;
2410 while (loop_running)
2412 #ifdef USE_TSHARK_SELECT
2413 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2419 } else if (ret == 1) {
2421 /* Call the real handler */
2422 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2423 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2426 #ifdef USE_TSHARK_SELECT
2431 CATCH(OutOfMemoryError) {
2435 "Sorry, but TShark has to terminate now!\n"
2437 "Some infos / workarounds can be found at:\n"
2438 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2445 /* capture child detected an error */
2447 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2449 cmdarg_err("%s", error_msg);
2450 cmdarg_err_cont("%s", secondary_error_msg);
2454 /* capture child detected an capture filter related error */
2456 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2458 capture_options *capture_opts = cap_session->capture_opts;
2459 dfilter_t *rfcode = NULL;
2460 interface_options interface_opts;
2462 g_assert(i < capture_opts->ifaces->len);
2463 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2465 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2467 "Invalid capture filter \"%s\" for interface %s!\n"
2469 "That string looks like a valid display filter; however, it isn't a valid\n"
2470 "capture filter (%s).\n"
2472 "Note that display filters and capture filters don't have the same syntax,\n"
2473 "so you can't use most display filter expressions as capture filters.\n"
2475 "See the User's Guide for a description of the capture filter syntax.",
2476 interface_opts.cfilter, interface_opts.descr, error_message);
2477 dfilter_free(rfcode);
2480 "Invalid capture filter \"%s\" for interface %s!\n"
2482 "That string isn't a valid capture filter (%s).\n"
2483 "See the User's Guide for a description of the capture filter syntax.",
2484 interface_opts.cfilter, interface_opts.descr, error_message);
2489 /* capture child tells us we have a new (or the first) capture file */
2491 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2493 capture_options *capture_opts = cap_session->capture_opts;
2494 gboolean is_tempfile;
2497 if (cap_session->state == CAPTURE_PREPARING) {
2498 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2500 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2502 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2504 /* free the old filename */
2505 if (capture_opts->save_file != NULL) {
2507 /* we start a new capture file, close the old one (if we had one before) */
2508 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2509 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2510 wtap_close(((capture_file *) cap_session->cf)->wth);
2511 ((capture_file *) cap_session->cf)->wth = NULL;
2513 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2516 g_free(capture_opts->save_file);
2517 is_tempfile = FALSE;
2519 /* we didn't had a save_file before, must be a tempfile */
2523 /* save the new filename */
2524 capture_opts->save_file = g_strdup(new_file);
2526 /* if we are in real-time mode, open the new file now */
2527 if (do_dissection) {
2528 /* Attempt to open the capture file and set up to read from it. */
2529 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2533 /* Don't unlink (delete) the save file - leave it around,
2534 for debugging purposes. */
2535 g_free(capture_opts->save_file);
2536 capture_opts->save_file = NULL;
2541 cap_session->state = CAPTURE_RUNNING;
2547 /* capture child tells us we have new packets to read */
2549 capture_input_new_packets(capture_session *cap_session, int to_read)
2555 capture_file *cf = (capture_file *)cap_session->cf;
2556 gboolean filtering_tap_listeners;
2561 * Prevent a SIGINFO handler from writing to the standard error while
2562 * we're doing so or writing to the standard output; instead, have it
2563 * just set a flag telling us to print that information when we're done.
2566 #endif /* SIGINFO */
2568 /* Do we have any tap listeners with filters? */
2569 filtering_tap_listeners = have_filtering_tap_listeners();
2571 /* Get the union of the flags for all tap listeners. */
2572 tap_flags = union_of_tap_listener_flags();
2574 if (do_dissection) {
2575 gboolean create_proto_tree;
2576 epan_dissect_t *edt;
2578 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
2579 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2580 create_proto_tree = TRUE;
2582 create_proto_tree = FALSE;
2584 /* The protocol tree will be "visible", i.e., printed, only if we're
2585 printing packet details, which is true if we're printing stuff
2586 ("print_packet_info" is true) and we're in verbose mode
2587 ("packet_details" is true). */
2588 edt = epan_dissect_new(cf->epan, create_proto_tree, print_packet_info && print_details);
2590 while (to_read-- && cf->wth) {
2591 wtap_cleareof(cf->wth);
2592 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2594 /* read from file failed, tell the capture child to stop */
2595 sync_pipe_stop(cap_session);
2596 wtap_close(cf->wth);
2599 ret = process_packet(cf, edt, data_offset, wtap_phdr(cf->wth),
2600 wtap_buf_ptr(cf->wth),
2604 /* packet successfully read and gone through the "Read Filter" */
2609 epan_dissect_free(edt);
2613 * Dumpcap's doing all the work; we're not doing any dissection.
2614 * Count all the packets it wrote.
2616 packet_count += to_read;
2619 if (print_packet_counts) {
2620 /* We're printing packet counts. */
2621 if (packet_count != 0) {
2622 fprintf(stderr, "\r%u ", packet_count);
2623 /* stderr could be line buffered */
2630 * Allow SIGINFO handlers to write.
2635 * If a SIGINFO handler asked us to write out capture counts, do so.
2639 #endif /* SIGINFO */
2645 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2646 /* Report the count only if we aren't printing a packet count
2647 as packets arrive. */
2648 fprintf(stderr, "%u packet%s captured\n", packet_count,
2649 plurality(packet_count, "", "s"));
2652 infoprint = FALSE; /* we just reported it */
2653 #endif /* SIGINFO */
2658 report_counts_siginfo(int signum _U_)
2660 int sav_errno = errno;
2661 /* If we've been told to delay printing, just set a flag asking
2662 that we print counts (if we're supposed to), otherwise print
2663 the count of packets captured (if we're supposed to). */
2670 #endif /* SIGINFO */
2673 /* capture child detected any packet drops? */
2675 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2677 if (print_packet_counts) {
2678 /* We're printing packet counts to stderr.
2679 Send a newline so that we move to the line after the packet count. */
2680 fprintf(stderr, "\n");
2684 /* We're printing packet counts to stderr.
2685 Send a newline so that we move to the line after the packet count. */
2686 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2692 * Capture child closed its side of the pipe, report any error and
2693 * do the required cleanup.
2696 capture_input_closed(capture_session *cap_session, gchar *msg)
2698 capture_file *cf = (capture_file *) cap_session->cf;
2701 fprintf(stderr, "tshark: %s\n", msg);
2705 if (cf != NULL && cf->wth != NULL) {
2706 wtap_close(cf->wth);
2707 if (cf->is_tempfile) {
2708 ws_unlink(cf->filename);
2711 #ifdef USE_BROKEN_G_MAIN_LOOP
2712 /*g_main_loop_quit(loop);*/
2715 loop_running = FALSE;
2724 capture_cleanup(DWORD ctrltype _U_)
2726 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2727 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2728 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2729 like SIGTERM at least when the machine's shutting down.
2731 For now, we handle them all as indications that we should clean up
2732 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2735 We must return TRUE so that no other handler - such as one that would
2736 terminate the process - gets called.
2738 XXX - for some reason, typing ^C to TShark, if you run this in
2739 a Cygwin console window in at least some versions of Cygwin,
2740 causes TShark to terminate immediately; this routine gets
2741 called, but the main loop doesn't get a chance to run and
2742 exit cleanly, at least if this is compiled with Microsoft Visual
2743 C++ (i.e., it's a property of the Cygwin console window or Bash;
2744 it happens if TShark is not built with Cygwin - for all I know,
2745 building it with Cygwin may make the problem go away). */
2747 /* tell the capture child to stop */
2748 sync_pipe_stop(&global_capture_session);
2750 /* don't stop our own loop already here, otherwise status messages and
2751 * cleanup wouldn't be done properly. The child will indicate the stop of
2752 * everything by calling capture_input_closed() later */
2758 capture_cleanup(int signum _U_)
2760 /* tell the capture child to stop */
2761 sync_pipe_stop(&global_capture_session);
2763 /* don't stop our own loop already here, otherwise status messages and
2764 * cleanup wouldn't be done properly. The child will indicate the stop of
2765 * everything by calling capture_input_closed() later */
2768 #endif /* HAVE_LIBPCAP */
2771 process_packet_first_pass(capture_file *cf, epan_dissect_t *edt,
2772 gint64 offset, struct wtap_pkthdr *whdr,
2779 /* The frame number of this packet is one more than the count of
2780 frames in this packet. */
2781 framenum = cf->count + 1;
2783 /* If we're not running a display filter and we're not printing any
2784 packet information, we don't need to do a dissection. This means
2785 that all packets can be marked as 'passed'. */
2788 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2790 /* If we're going to print packet information, or we're going to
2791 run a read filter, or display filter, or we're going to process taps, set up to
2792 do a dissection and do so. */
2794 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2795 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2796 /* Grab any resolved addresses */
2797 host_name_lookup_process();
2799 /* If we're running a read filter, prime the epan_dissect_t with that
2802 epan_dissect_prime_dfilter(edt, cf->rfcode);
2804 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2806 if (ref == &fdlocal) {
2807 ref_frame = fdlocal;
2811 epan_dissect_run(edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2813 /* Run the read filter if we have one. */
2815 passed = dfilter_apply_edt(cf->rfcode, edt);
2819 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2820 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2822 /* If we're not doing dissection then there won't be any dependent frames.
2823 * More importantly, edt.pi.dependent_frames won't be initialized because
2824 * epan hasn't been initialized.
2827 g_slist_foreach(edt->pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2832 /* if we don't add it to the frame_data_sequence, clean it up right now
2834 frame_data_destroy(&fdlocal);
2838 epan_dissect_reset(edt);
2844 process_packet_second_pass(capture_file *cf, epan_dissect_t *edt, frame_data *fdata,
2845 struct wtap_pkthdr *phdr, Buffer *buf,
2851 /* If we're not running a display filter and we're not printing any
2852 packet information, we don't need to do a dissection. This means
2853 that all packets can be marked as 'passed'. */
2856 /* If we're going to print packet information, or we're going to
2857 run a read filter, or we're going to process taps, set up to
2858 do a dissection and do so. */
2860 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2861 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2862 /* Grab any resolved addresses */
2863 host_name_lookup_process();
2865 /* If we're running a display filter, prime the epan_dissect_t with that
2868 epan_dissect_prime_dfilter(edt, cf->dfcode);
2870 col_custom_prime_edt(edt, &cf->cinfo);
2872 /* We only need the columns if either
2873 1) some tap needs the columns
2875 2) we're printing packet info but we're *not* verbose; in verbose
2876 mode, we print the protocol tree, not the protocol summary.
2878 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2883 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2890 epan_dissect_run_with_taps(edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2892 /* Run the read/display filter if we have one. */
2894 passed = dfilter_apply_edt(cf->dfcode, edt);
2898 frame_data_set_after_dissect(fdata, &cum_bytes);
2899 /* Process this packet. */
2900 if (print_packet_info) {
2901 /* We're printing packet information; print the information for
2903 print_packet(cf, edt);
2905 /* The ANSI C standard does not appear to *require* that a line-buffered
2906 stream be flushed to the host environment whenever a newline is
2907 written, it just says that, on such a stream, characters "are
2908 intended to be transmitted to or from the host environment as a
2909 block when a new-line character is encountered".
2911 The Visual C++ 6.0 C implementation doesn't do what is intended;
2912 even if you set a stream to be line-buffered, it still doesn't
2913 flush the buffer at the end of every line.
2915 So, if the "-l" flag was specified, we flush the standard output
2916 at the end of a packet. This will do the right thing if we're
2917 printing packet summary lines, and, as we print the entire protocol
2918 tree for a single packet without waiting for anything to happen,
2919 it should be as good as line-buffered mode if we're printing
2920 protocol trees. (The whole reason for the "-l" flag in either
2921 tcpdump or TShark is to allow the output of a live capture to
2922 be piped to a program or script and to have that script see the
2923 information for the packet as soon as it's printed, rather than
2924 having to wait until a standard I/O buffer fills up. */
2928 if (ferror(stdout)) {
2929 show_print_file_io_error(errno);
2938 epan_dissect_reset(edt);
2940 return passed || fdata->flags.dependent_of_displayed;
2944 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2945 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2948 int snapshot_length;
2952 gchar *err_info = NULL;
2954 char *save_file_string = NULL;
2955 gboolean filtering_tap_listeners;
2957 wtapng_section_t *shb_hdr;
2958 wtapng_iface_descriptions_t *idb_inf;
2961 epan_dissect_t *edt = NULL;
2963 shb_hdr = wtap_file_get_shb_info(cf->wth);
2964 idb_inf = wtap_file_get_idb_info(cf->wth);
2965 #ifdef PCAP_NG_DEFAULT
2966 if (idb_inf->number_of_interfaces > 1) {
2967 linktype = WTAP_ENCAP_PER_PACKET;
2969 linktype = wtap_file_encap(cf->wth);
2972 linktype = wtap_file_encap(cf->wth);
2974 if (save_file != NULL) {
2975 /* Get a string that describes what we're writing to */
2976 save_file_string = output_file_description(save_file);
2978 /* Set up to write to the capture file. */
2979 snapshot_length = wtap_snapshot_length(cf->wth);
2980 if (snapshot_length == 0) {
2981 /* Snapshot length of input file not known. */
2982 snapshot_length = WTAP_MAX_PACKET_SIZE;
2984 /* If we don't have an application name add Tshark */
2985 if (shb_hdr->shb_user_appl == NULL) {
2986 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2987 shb_hdr->shb_user_appl = appname;
2990 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2991 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2992 snapshot_length, FALSE /* compressed */, &err);
2994 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2995 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
3001 /* We couldn't set up to write to the capture file. */
3004 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3005 cmdarg_err("Capture files can't be written in that format.");
3008 case WTAP_ERR_UNSUPPORTED_ENCAP:
3009 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3010 cmdarg_err("The capture file being read can't be written as a "
3011 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
3014 case WTAP_ERR_CANT_OPEN:
3015 cmdarg_err("The %s couldn't be created for some "
3016 "unknown reason.", save_file_string);
3019 case WTAP_ERR_SHORT_WRITE:
3020 cmdarg_err("A full header couldn't be written to the %s.",
3025 cmdarg_err("The %s could not be created: %s.", save_file_string,
3026 wtap_strerror(err));
3032 if (print_packet_info) {
3033 if (!write_preamble(cf)) {
3035 show_print_file_io_error(err);
3044 if (pdh && out_file_name_res) {
3045 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
3046 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
3047 wtap_file_type_short_string(out_file_type));
3051 /* Do we have any tap listeners with filters? */
3052 filtering_tap_listeners = have_filtering_tap_listeners();
3054 /* Get the union of the flags for all tap listeners. */
3055 tap_flags = union_of_tap_listener_flags();
3057 if (perform_two_pass_analysis) {
3060 /* Allocate a frame_data_sequence for all the frames. */
3061 cf->frames = new_frame_data_sequence();
3063 if (do_dissection) {
3064 gboolean create_proto_tree = FALSE;
3066 /* If we're going to be applying a filter, we'll need to
3067 create a protocol tree against which to apply the filter. */
3069 create_proto_tree = TRUE;
3071 /* We're not going to display the protocol tree on this pass,
3072 so it's not going to be "visible". */
3073 edt = epan_dissect_new(cf->epan, create_proto_tree, FALSE);
3076 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3077 if (process_packet_first_pass(cf, edt, data_offset, wtap_phdr(cf->wth),
3078 wtap_buf_ptr(cf->wth))) {
3079 /* Stop reading if we have the maximum number of packets;
3080 * When the -c option has not been used, max_packet_count
3081 * starts at 0, which practically means, never stop reading.
3082 * (unless we roll over max_packet_count ?)
3084 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3085 err = 0; /* This is not an error */
3092 epan_dissect_free(edt);
3096 /* Close the sequential I/O side, to free up memory it requires. */
3097 wtap_sequential_close(cf->wth);
3099 /* Allow the protocol dissectors to free up memory that they
3100 * don't need after the sequential run-through of the packets. */
3101 postseq_cleanup_all_protocols();
3105 buffer_init(&buf, 1500);
3107 if (do_dissection) {
3108 gboolean create_proto_tree;
3110 if (cf->dfcode || print_details || filtering_tap_listeners ||
3111 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3112 create_proto_tree = TRUE;
3114 create_proto_tree = FALSE;
3116 /* The protocol tree will be "visible", i.e., printed, only if we're
3117 printing packet details, which is true if we're printing stuff
3118 ("print_packet_info" is true) and we're in verbose mode
3119 ("packet_details" is true). */
3120 edt = epan_dissect_new(cf->epan, create_proto_tree, print_packet_info && print_details);
3123 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3124 fdata = frame_data_sequence_find(cf->frames, framenum);
3125 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3126 &buf, fdata->cap_len, &err, &err_info)) {
3127 if (process_packet_second_pass(cf, edt, fdata, &cf->phdr, &buf,
3129 /* Either there's no read filtering or this packet passed the
3130 filter, so, if we're writing to a capture file, write
3133 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3134 /* Error writing to a capture file */
3137 case WTAP_ERR_UNSUPPORTED_ENCAP:
3139 * This is a problem with the particular frame we're writing;
3140 * note that, and give the frame number.
3142 * XXX - framenum is not necessarily the frame number in
3143 * the input file if there was a read filter.
3146 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3147 framenum, cf->filename,
3148 wtap_file_type_short_string(out_file_type));
3152 show_capture_file_io_error(save_file, err, FALSE);
3155 wtap_dump_close(pdh, &err);
3165 epan_dissect_free(edt);
3174 if (do_dissection) {
3175 gboolean create_proto_tree;
3177 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3178 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3179 create_proto_tree = TRUE;
3181 create_proto_tree = FALSE;
3183 /* The protocol tree will be "visible", i.e., printed, only if we're
3184 printing packet details, which is true if we're printing stuff
3185 ("print_packet_info" is true) and we're in verbose mode
3186 ("packet_details" is true). */
3187 edt = epan_dissect_new(cf->epan, create_proto_tree, print_packet_info && print_details);
3190 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3193 if (process_packet(cf, edt, data_offset, wtap_phdr(cf->wth),
3194 wtap_buf_ptr(cf->wth),
3196 /* Either there's no read filtering or this packet passed the
3197 filter, so, if we're writing to a capture file, write
3200 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3201 /* Error writing to a capture file */
3204 case WTAP_ERR_UNSUPPORTED_ENCAP:
3206 * This is a problem with the particular frame we're writing;
3207 * note that, and give the frame number.
3210 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3211 framenum, cf->filename,
3212 wtap_file_type_short_string(out_file_type));
3216 show_capture_file_io_error(save_file, err, FALSE);
3219 wtap_dump_close(pdh, &err);
3225 /* Stop reading if we have the maximum number of packets;
3226 * When the -c option has not been used, max_packet_count
3227 * starts at 0, which practically means, never stop reading.
3228 * (unless we roll over max_packet_count ?)
3230 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3231 err = 0; /* This is not an error */
3237 epan_dissect_free(edt);
3244 * Print a message noting that the read failed somewhere along the line.
3246 * If we're printing packet data, and the standard output and error are
3247 * going to the same place, flush the standard output, so everything
3248 * buffered up is written, and then print a newline to the standard error
3249 * before printing the error message, to separate it from the packet
3250 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3251 * the _fstat() documentation at Microsoft doesn't indicate whether
3252 * st_ino is even supported.)
3255 if (print_packet_info) {
3256 struct stat stat_stdout, stat_stderr;
3258 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3259 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3260 stat_stdout.st_ino == stat_stderr.st_ino) {
3262 fprintf(stderr, "\n");
3269 case WTAP_ERR_UNSUPPORTED:
3270 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3271 cf->filename, err_info);
3275 case WTAP_ERR_UNSUPPORTED_ENCAP:
3276 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3277 cf->filename, err_info);
3281 case WTAP_ERR_CANT_READ:
3282 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3286 case WTAP_ERR_SHORT_READ:
3287 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3291 case WTAP_ERR_BAD_FILE:
3292 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3293 cf->filename, err_info);
3297 case WTAP_ERR_DECOMPRESS:
3298 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3299 "(%s)", cf->filename, err_info);
3303 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3304 cf->filename, wtap_strerror(err));
3307 if (save_file != NULL) {
3308 /* Now close the capture file. */
3309 if (!wtap_dump_close(pdh, &err))
3310 show_capture_file_io_error(save_file, err, TRUE);
3313 if (save_file != NULL) {
3314 /* Now close the capture file. */
3315 if (!wtap_dump_close(pdh, &err))
3316 show_capture_file_io_error(save_file, err, TRUE);
3318 if (print_packet_info) {
3319 if (!write_finale()) {
3321 show_print_file_io_error(err);
3328 wtap_close(cf->wth);
3331 g_free(save_file_string);
3338 process_packet(capture_file *cf, epan_dissect_t *edt, gint64 offset, struct wtap_pkthdr *whdr,
3339 const guchar *pd, guint tap_flags)
3345 /* Count this packet. */
3348 /* If we're not running a display filter and we're not printing any
3349 packet information, we don't need to do a dissection. This means
3350 that all packets can be marked as 'passed'. */
3353 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3355 /* If we're going to print packet information, or we're going to
3356 run a read filter, or we're going to process taps, set up to
3357 do a dissection and do so. */
3359 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3360 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3361 /* Grab any resolved addresses */
3362 host_name_lookup_process();
3364 /* If we're running a filter, prime the epan_dissect_t with that
3367 epan_dissect_prime_dfilter(edt, cf->dfcode);
3369 col_custom_prime_edt(edt, &cf->cinfo);
3371 /* We only need the columns if either
3372 1) some tap needs the columns
3374 2) we're printing packet info but we're *not* verbose; in verbose
3375 mode, we print the protocol tree, not the protocol summary.
3377 3) there is a column mapped as an individual field */
3378 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3383 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3385 if (ref == &fdata) {
3390 epan_dissect_run_with_taps(edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3392 /* Run the filter if we have it. */
3394 passed = dfilter_apply_edt(cf->dfcode, edt);
3398 frame_data_set_after_dissect(&fdata, &cum_bytes);
3400 /* Process this packet. */
3401 if (print_packet_info) {
3402 /* We're printing packet information; print the information for
3404 print_packet(cf, edt);
3406 /* The ANSI C standard does not appear to *require* that a line-buffered
3407 stream be flushed to the host environment whenever a newline is
3408 written, it just says that, on such a stream, characters "are
3409 intended to be transmitted to or from the host environment as a
3410 block when a new-line character is encountered".
3412 The Visual C++ 6.0 C implementation doesn't do what is intended;
3413 even if you set a stream to be line-buffered, it still doesn't
3414 flush the buffer at the end of every line.
3416 So, if the "-l" flag was specified, we flush the standard output
3417 at the end of a packet. This will do the right thing if we're
3418 printing packet summary lines, and, as we print the entire protocol
3419 tree for a single packet without waiting for anything to happen,
3420 it should be as good as line-buffered mode if we're printing
3421 protocol trees. (The whole reason for the "-l" flag in either
3422 tcpdump or TShark is to allow the output of a live capture to
3423 be piped to a program or script and to have that script see the
3424 information for the packet as soon as it's printed, rather than
3425 having to wait until a standard I/O buffer fills up. */
3429 if (ferror(stdout)) {
3430 show_print_file_io_error(errno);
3435 /* this must be set after print_packet() [bug #8160] */
3436 prev_dis_frame = fdata;
3437 prev_dis = &prev_dis_frame;
3440 prev_cap_frame = fdata;
3441 prev_cap = &prev_cap_frame;
3444 epan_dissect_reset(edt);
3445 frame_data_destroy(&fdata);
3451 write_preamble(capture_file *cf)
3453 switch (output_action) {
3456 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3460 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3462 write_psml_preamble(stdout);
3463 return !ferror(stdout);
3466 write_fields_preamble(output_fields, stdout);
3467 return !ferror(stdout);
3470 g_assert_not_reached();
3476 get_line_buf(size_t len)
3478 static char *line_bufp = NULL;
3479 static size_t line_buf_len = 256;
3480 size_t new_line_buf_len;
3482 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3483 new_line_buf_len *= 2)
3485 if (line_bufp == NULL) {
3486 line_buf_len = new_line_buf_len;
3487 line_bufp = (char *)g_malloc(line_buf_len + 1);
3489 if (new_line_buf_len > line_buf_len) {
3490 line_buf_len = new_line_buf_len;
3491 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3498 put_string(char *dest, const char *str, size_t str_len)
3500 memcpy(dest, str, str_len);
3501 dest[str_len] = '\0';
3505 put_spaces_string(char *dest, const char *str, size_t str_len, size_t str_with_spaces)
3509 for (i = str_len; i < str_with_spaces; i++)
3512 put_string(dest, str, str_len);
3516 put_string_spaces(char *dest, const char *str, size_t str_len, size_t str_with_spaces)
3520 memcpy(dest, str, str_len);
3521 for (i = str_len; i < str_with_spaces; i++)
3524 dest[str_with_spaces] = '\0';
3528 print_columns(capture_file *cf)
3536 line_bufp = get_line_buf(256);
3539 for (i = 0; i < cf->cinfo.num_cols; i++) {
3540 /* Skip columns not marked as visible. */
3541 if (!get_column_visible(i))
3543 switch (cf->cinfo.col_fmt[i]) {
3545 column_len = col_len = strlen(cf->cinfo.col_data[i]);
3548 line_bufp = get_line_buf(buf_offset + column_len);
3549 put_spaces_string(line_bufp + buf_offset, cf->cinfo.col_data[i], col_len, column_len);
3555 case COL_ABS_DATE_TIME:
3557 case COL_UTC_DATE_TIME: /* XXX - wider */
3558 column_len = col_len = strlen(cf->cinfo.col_data[i]);
3559 if (column_len < 10)
3561 line_bufp = get_line_buf(buf_offset + column_len);
3562 put_spaces_string(line_bufp + buf_offset, cf->cinfo.col_data[i], col_len, column_len);
3568 case COL_DEF_DL_SRC:
3569 case COL_RES_DL_SRC:
3570 case COL_UNRES_DL_SRC:
3571 case COL_DEF_NET_SRC:
3572 case COL_RES_NET_SRC:
3573 case COL_UNRES_NET_SRC:
3574 column_len = col_len = strlen(cf->cinfo.col_data[i]);
3575 if (column_len < 12)
3577 line_bufp = get_line_buf(buf_offset + column_len);
3578 put_spaces_string(line_bufp + buf_offset, cf->cinfo.col_data[i], col_len, column_len);
3584 case COL_DEF_DL_DST:
3585 case COL_RES_DL_DST:
3586 case COL_UNRES_DL_DST:
3587 case COL_DEF_NET_DST:
3588 case COL_RES_NET_DST:
3589 case COL_UNRES_NET_DST:
3590 column_len = col_len = strlen(cf->cinfo.col_data[i]);
3591 if (column_len < 12)
3593 line_bufp = get_line_buf(buf_offset + column_len);
3594 put_string_spaces(line_bufp + buf_offset, cf->cinfo.col_data[i], col_len, column_len);
3598 column_len = strlen(cf->cinfo.col_data[i]);
3599 line_bufp = get_line_buf(buf_offset + column_len);
3600 put_string(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len);
3603 buf_offset += column_len;
3604 if (i != cf->cinfo.num_cols - 1) {
3606 * This isn't the last column, so we need to print a
3607 * separator between this column and the next.
3609 * If we printed a network source and are printing a
3610 * network destination of the same type next, separate
3611 * them with " -> "; if we printed a network destination
3612 * and are printing a network source of the same type
3613 * next, separate them with " <- "; otherwise separate them
3616 * We add enough space to the buffer for " <- " or " -> ",
3617 * even if we're only adding " ".
3619 line_bufp = get_line_buf(buf_offset + 4);
3620 switch (cf->cinfo.col_fmt[i]) {
3625 switch (cf->cinfo.col_fmt[i + 1]) {
3630 put_string(line_bufp + buf_offset, " -> ", 4);
3635 put_string(line_bufp + buf_offset, " ", 1);
3641 case COL_DEF_DL_SRC:
3642 case COL_RES_DL_SRC:
3643 case COL_UNRES_DL_SRC:
3644 switch (cf->cinfo.col_fmt[i + 1]) {
3646 case COL_DEF_DL_DST:
3647 case COL_RES_DL_DST:
3648 case COL_UNRES_DL_DST:
3649 put_string(line_bufp + buf_offset, " -> ", 4);
3654 put_string(line_bufp + buf_offset, " ", 1);
3660 case COL_DEF_NET_SRC:
3661 case COL_RES_NET_SRC:
3662 case COL_UNRES_NET_SRC:
3663 switch (cf->cinfo.col_fmt[i + 1]) {
3665 case COL_DEF_NET_DST:
3666 case COL_RES_NET_DST:
3667 case COL_UNRES_NET_DST:
3668 put_string(line_bufp + buf_offset, " -> ", 4);
3673 put_string(line_bufp + buf_offset, " ", 1);
3682 switch (cf->cinfo.col_fmt[i + 1]) {
3687 put_string(line_bufp + buf_offset, " <- ", 4);
3692 put_string(line_bufp + buf_offset, " ", 1);
3698 case COL_DEF_DL_DST:
3699 case COL_RES_DL_DST:
3700 case COL_UNRES_DL_DST:
3701 switch (cf->cinfo.col_fmt[i + 1]) {
3703 case COL_DEF_DL_SRC:
3704 case COL_RES_DL_SRC:
3705 case COL_UNRES_DL_SRC:
3706 put_string(line_bufp + buf_offset, " <- ", 4);
3711 put_string(line_bufp + buf_offset, " ", 1);
3717 case COL_DEF_NET_DST:
3718 case COL_RES_NET_DST:
3719 case COL_UNRES_NET_DST:
3720 switch (cf->cinfo.col_fmt[i + 1]) {
3722 case COL_DEF_NET_SRC:
3723 case COL_RES_NET_SRC:
3724 case COL_UNRES_NET_SRC:
3725 put_string(line_bufp + buf_offset, " <- ", 4);
3730 put_string(line_bufp + buf_offset, " ", 1);
3737 put_string(line_bufp + buf_offset, " ", 1);
3743 return print_line(print_stream, 0, line_bufp);
3747 print_packet(capture_file *cf, epan_dissect_t *edt)
3749 print_args_t print_args;
3751 if (print_summary || output_fields_has_cols(output_fields)) {
3752 /* Just fill in the columns. */
3753 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3755 if (print_summary) {
3756 /* Now print them. */
3757 switch (output_action) {
3760 if (!print_columns(cf))
3765 proto_tree_write_psml(edt, stdout);
3766 return !ferror(stdout);
3767 case WRITE_FIELDS: /*No non-verbose "fields" format */
3768 g_assert_not_reached();
3773 if (print_details) {
3774 /* Print the information in the protocol tree. */
3775 switch (output_action) {
3778 /* Only initialize the fields that are actually used in proto_tree_print.
3779 * This is particularly important for .range, as that's heap memory which
3780 * we would otherwise have to g_free().
3781 print_args.to_file = TRUE;
3782 print_args.format = print_format;
3783 print_args.print_summary = print_summary;
3784 print_args.print_formfeed = FALSE;
3785 packet_range_init(&print_args.range, &cfile);
3787 print_args.print_hex = print_hex;
3788 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3790 if (!proto_tree_print(&print_args, edt, print_stream))
3793 if (!print_line(print_stream, 0, separator))
3799 proto_tree_write_pdml(edt, stdout);
3801 return !ferror(stdout);
3803 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3805 return !ferror(stdout);
3809 if (print_summary || print_details) {
3810 if (!print_line(print_stream, 0, ""))
3813 if (!print_hex_data(print_stream, edt))
3815 if (!print_line(print_stream, 0, separator))
3824 switch (output_action) {
3827 return print_finale(print_stream);
3831 write_pdml_finale(stdout);
3833 write_psml_finale(stdout);
3834 return !ferror(stdout);
3837 write_fields_finale(output_fields, stdout);
3838 return !ferror(stdout);
3841 g_assert_not_reached();
3847 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3851 char err_msg[2048+1];
3853 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3857 /* The open succeeded. Fill in the information for this file. */
3859 /* Create new epan session for dissection. */
3860 epan_free(cf->epan);
3861 cf->epan = tshark_epan_new(cf);
3864 cf->f_datalen = 0; /* not used, but set it anyway */
3866 /* Set the file name because we need it to set the follow stream filter.
3867 XXX - is that still true? We need it for other reasons, though,
3869 cf->filename = g_strdup(fname);
3871 /* Indicate whether it's a permanent or temporary file. */
3872 cf->is_tempfile = is_tempfile;
3874 /* No user changes yet. */
3875 cf->unsaved_changes = FALSE;
3877 cf->cd_t = wtap_file_type(cf->wth);
3879 cf->drops_known = FALSE;
3881 cf->snap = wtap_snapshot_length(cf->wth);
3882 if (cf->snap == 0) {
3883 /* Snapshot length not known. */
3884 cf->has_snap = FALSE;
3885 cf->snap = WTAP_MAX_PACKET_SIZE;
3887 cf->has_snap = TRUE;
3888 nstime_set_zero(&cf->elapsed_time);
3893 cf->state = FILE_READ_IN_PROGRESS;
3895 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3896 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3901 g_snprintf(err_msg, sizeof err_msg,
3902 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3903 cmdarg_err("%s", err_msg);
3908 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3910 char *save_file_string;
3912 save_file_string = output_file_description(fname);
3917 cmdarg_err("Not all the packets could be written to the %s because there is "
3918 "no space left on the file system.",
3924 cmdarg_err("Not all the packets could be written to the %s because you are "
3925 "too close to, or over your disk quota.",
3930 case WTAP_ERR_CANT_CLOSE:
3931 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3935 case WTAP_ERR_SHORT_WRITE:
3936 cmdarg_err("Not all the packets could be written to the %s.",
3942 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3943 wtap_strerror(err));
3945 cmdarg_err("An error occurred while writing to the %s: %s.",
3946 save_file_string, wtap_strerror(err));
3950 g_free(save_file_string);
3954 show_print_file_io_error(int err)
3959 cmdarg_err("Not all the packets could be printed because there is "
3960 "no space left on the file system.");
3965 cmdarg_err("Not all the packets could be printed because you are "
3966 "too close to, or over your disk quota.");
3971 cmdarg_err("An error occurred while printing packets: %s.",
3978 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3982 static char errmsg_errno[1024+1];
3985 /* Wiretap error. */
3988 case WTAP_ERR_NOT_REGULAR_FILE:
3989 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3992 case WTAP_ERR_RANDOM_OPEN_PIPE:
3993 /* Seen only when opening a capture file for reading. */
3994 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3997 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3998 /* Seen only when opening a capture file for reading. */
3999 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
4002 case WTAP_ERR_UNSUPPORTED:
4003 /* Seen only when opening a capture file for reading. */
4004 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4005 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
4008 errmsg = errmsg_errno;
4011 case WTAP_ERR_CANT_WRITE_TO_PIPE:
4012 /* Seen only when opening a capture file for writing. */
4013 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4014 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
4015 "written to a pipe.", wtap_file_type_short_string(file_type));
4016 errmsg = errmsg_errno;
4019 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
4020 /* Seen only when opening a capture file for writing. */
4021 errmsg = "TShark doesn't support writing capture files in that format.";
4024 case WTAP_ERR_UNSUPPORTED_ENCAP:
4026 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4027 "TShark can't save this capture as a \"%s\" file.",
4028 wtap_file_type_short_string(file_type));
4030 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4031 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
4035 errmsg = errmsg_errno;
4038 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
4040 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4041 "TShark can't save this capture as a \"%s\" file.",
4042 wtap_file_type_short_string(file_type));
4043 errmsg = errmsg_errno;
4045 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
4048 case WTAP_ERR_BAD_FILE:
4049 /* Seen only when opening a capture file for reading. */
4050 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4051 "The file \"%%s\" appears to be damaged or corrupt.\n"
4054 errmsg = errmsg_errno;
4057 case WTAP_ERR_CANT_OPEN:
4059 errmsg = "The file \"%s\" could not be created for some unknown reason.";
4061 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
4064 case WTAP_ERR_SHORT_READ:
4065 errmsg = "The file \"%s\" appears to have been cut short"
4066 " in the middle of a packet or other data.";
4069 case WTAP_ERR_SHORT_WRITE:
4070 errmsg = "A full header couldn't be written to the file \"%s\".";
4073 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
4074 errmsg = "This file type cannot be written as a compressed file.";
4077 case WTAP_ERR_DECOMPRESS:
4078 /* Seen only when opening a capture file for reading. */
4079 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4080 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
4083 errmsg = errmsg_errno;
4087 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4088 "The file \"%%s\" could not be %s: %s.",
4089 for_writing ? "created" : "opened",
4090 wtap_strerror(err));
4091 errmsg = errmsg_errno;
4095 errmsg = file_open_error_message(err, for_writing);
4100 * Open/create errors are reported with an console message in TShark.
4103 open_failure_message(const char *filename, int err, gboolean for_writing)
4105 fprintf(stderr, "tshark: ");
4106 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4107 fprintf(stderr, "\n");
4112 * General errors are reported with an console message in TShark.
4115 failure_message(const char *msg_format, va_list ap)
4117 fprintf(stderr, "tshark: ");
4118 vfprintf(stderr, msg_format, ap);
4119 fprintf(stderr, "\n");
4123 * Read errors are reported with an console message in TShark.
4126 read_failure_message(const char *filename, int err)
4128 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4129 filename, g_strerror(err));
4133 * Write errors are reported with an console message in TShark.
4136 write_failure_message(const char *filename, int err)
4138 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4139 filename, g_strerror(err));
4143 * Report an error in command-line arguments.
4146 cmdarg_err(const char *fmt, ...)
4151 failure_message(fmt, ap);
4156 * Report additional information for an error in command-line arguments.
4159 cmdarg_err_cont(const char *fmt, ...)
4164 vfprintf(stderr, fmt, ap);
4165 fprintf(stderr, "\n");
4171 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4176 * indent-tabs-mode: nil
4179 * vi: set shiftwidth=2 tabstop=8 expandtab:
4180 * :indentSize=2:tabSize=8:noTabs=true: