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>
91 #include "capture_ui_utils.h"
92 #include "capture_ifinfo.h"
93 #include "capture-pcap-util.h"
95 #include "capture-wpcap.h"
96 #include <wsutil/unicode-utils.h>
98 #include "capture_opts.h"
99 #include "capture_session.h"
100 #include "capture_sync.h"
101 #include "capture_opts.h"
102 #endif /* HAVE_LIBPCAP */
104 #include <epan/funnel.h>
107 * This is the template for the decode as option; it is shared between the
108 * various functions that output the usage for this parameter.
110 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
112 static guint32 cum_bytes;
113 static const frame_data *ref;
114 static frame_data ref_frame;
115 static frame_data *prev_dis;
116 static frame_data prev_dis_frame;
117 static frame_data *prev_cap;
118 static frame_data prev_cap_frame;
120 static const char* prev_display_dissector_name = NULL;
122 static gboolean perform_two_pass_analysis;
125 * The way the packet decode is to be written.
128 WRITE_TEXT, /* summary or detail text */
129 WRITE_XML, /* PDML or PSML */
130 WRITE_FIELDS /* User defined list of fields */
131 /* Add CSV and the like here */
134 static output_action_e output_action;
135 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
136 static gboolean print_packet_info; /* TRUE if we're to print packet information */
137 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
138 static gboolean print_details; /* TRUE if we're to print packet details information */
139 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
140 static gboolean line_buffered;
141 static gboolean really_quiet = FALSE;
143 static print_format_e print_format = PR_FMT_TEXT;
144 static print_stream_t *print_stream;
146 static output_fields_t* output_fields = NULL;
148 /* The line separator used between packets, changeable via the -S option */
149 static const char *separator = "";
153 * TRUE if we're to print packet counts to keep track of captured packets.
155 static gboolean print_packet_counts = TRUE;
157 static capture_options global_capture_opts;
158 static capture_session global_capture_session;
161 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
162 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
165 static gboolean capture(void);
166 static void report_counts(void);
168 static BOOL WINAPI capture_cleanup(DWORD);
170 static void capture_cleanup(int);
172 static void report_counts_siginfo(int);
175 #endif /* HAVE_LIBPCAP */
177 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
178 static gboolean process_packet(capture_file *cf, gint64 offset,
179 struct wtap_pkthdr *whdr, const guchar *pd,
180 gboolean filtering_tap_listeners, guint tap_flags);
181 static void show_capture_file_io_error(const char *, int, gboolean);
182 static void show_print_file_io_error(int err);
183 static gboolean write_preamble(capture_file *cf);
184 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
185 static gboolean write_finale(void);
186 static const char *cf_open_error_message(int err, gchar *err_info,
187 gboolean for_writing, int file_type);
189 static void open_failure_message(const char *filename, int err,
190 gboolean for_writing);
191 static void failure_message(const char *msg_format, va_list ap);
192 static void read_failure_message(const char *filename, int err);
193 static void write_failure_message(const char *filename, int err);
198 const char *sstr; /* The short string */
199 const char *lstr; /* The long string */
203 string_compare(gconstpointer a, gconstpointer b)
205 return strcmp(((const struct string_elem *)a)->sstr,
206 ((const struct string_elem *)b)->sstr);
210 string_elem_print(gpointer data, gpointer not_used _U_)
212 fprintf(stderr, " %s - %s\n",
213 ((struct string_elem *)data)->sstr,
214 ((struct string_elem *)data)->lstr);
218 list_capture_types(void) {
220 struct string_elem *captypes;
223 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
225 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
226 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
227 if (wtap_dump_can_open(i)) {
228 captypes[i].sstr = wtap_file_type_short_string(i);
229 captypes[i].lstr = wtap_file_type_string(i);
230 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
233 g_slist_foreach(list, string_elem_print, NULL);
239 print_usage(gboolean print_ver)
246 "TShark " VERSION "%s\n"
247 "Dump and analyze network traffic.\n"
248 "See http://www.wireshark.org for more information.\n"
251 wireshark_svnversion, get_copyright_info());
255 fprintf(output, "\n");
256 fprintf(output, "Usage: tshark [options] ...\n");
257 fprintf(output, "\n");
260 fprintf(output, "Capture interface:\n");
261 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
262 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
263 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
264 fprintf(output, " -p don't capture in promiscuous mode\n");
265 #ifdef HAVE_PCAP_CREATE
266 fprintf(output, " -I capture in monitor mode, if available\n");
268 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
269 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
271 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
272 fprintf(output, " -D print list of interfaces and exit\n");
273 fprintf(output, " -L print list of link-layer types of iface and exit\n");
274 fprintf(output, "\n");
275 fprintf(output, "Capture stop conditions:\n");
276 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
277 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
278 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
279 fprintf(output, " files:NUM - stop after NUM files\n");
280 /*fprintf(output, "\n");*/
281 fprintf(output, "Capture output:\n");
282 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
283 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
284 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
285 #endif /* HAVE_LIBPCAP */
286 #ifdef HAVE_PCAP_REMOTE
287 fprintf(output, "RPCAP options:\n");
288 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
290 /*fprintf(output, "\n");*/
291 fprintf(output, "Input file:\n");
292 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
294 fprintf(output, "\n");
295 fprintf(output, "Processing:\n");
296 fprintf(output, " -2 perform a two-pass analysis\n");
297 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
298 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
299 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
300 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
301 fprintf(output, " -d %s ...\n", decode_as_arg_template);
302 fprintf(output, " \"Decode As\", see the man page for details\n");
303 fprintf(output, " Example: tcp.port==8888,http\n");
304 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
305 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
307 /*fprintf(output, "\n");*/
308 fprintf(output, "Output:\n");
309 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
310 fprintf(output, " (or to the standard output for \"-\")\n");
311 fprintf(output, " -C <config profile> start with specified configuration profile\n");
312 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
313 fprintf(output, " an empty \"-F\" option will list the file types\n");
314 fprintf(output, " -V add output of packet tree (Packet Details)\n");
315 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
316 fprintf(output, " separated\n");
317 fprintf(output, " -P print packet summary even when writing to a file\n");
318 fprintf(output, " -S <separator> the line separator to print between packets\n");
319 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
320 fprintf(output, " -T pdml|ps|psml|text|fields\n");
321 fprintf(output, " format of text output (def: text)\n");
322 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
323 fprintf(output, " this option can be repeated to print multiple fields\n");
324 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
325 fprintf(output, " header=y|n switch headers on and off\n");
326 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
327 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
328 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
329 fprintf(output, " aggregator\n");
330 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
331 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
332 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
333 fprintf(output, " -l flush standard output after each packet\n");
334 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
335 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
336 fprintf(output, " -g enable group read access on the output file(s)\n");
337 fprintf(output, " -W n Save extra information in the file, if supported.\n");
338 fprintf(output, " n = write network address resolution information\n");
339 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
340 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
341 fprintf(output, " --capture-comment <comment>\n");
342 fprintf(output, " add a capture comment to the newly created\n");
343 fprintf(output, " output file (only for pcapng)\n");
345 fprintf(output, "\n");
346 fprintf(output, "Miscellaneous:\n");
347 fprintf(output, " -h display this help and exit\n");
348 fprintf(output, " -v display version info and exit\n");
349 fprintf(output, " -o <name>:<value> ... override preference setting\n");
350 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
351 fprintf(output, " -G [report] dump one of several available reports and exit\n");
352 fprintf(output, " default report=\"fields\"\n");
353 fprintf(output, " use \"-G ?\" for more help\n");
357 glossary_option_help(void)
363 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
365 fprintf(output, "\n");
366 fprintf(output, "Usage: tshark -G [report]\n");
367 fprintf(output, "\n");
368 fprintf(output, "Glossary table reports:\n");
369 fprintf(output, " -G fields dump fields glossary and exit\n");
370 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
371 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
372 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
373 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
374 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
375 fprintf(output, "\n");
376 fprintf(output, "Preference reports:\n");
377 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
378 fprintf(output, " -G currentprefs dump current preferences and exit\n");
379 fprintf(output, "\n");
383 * For a dissector table, print on the stream described by output,
384 * its short name (which is what's used in the "-d" option) and its
388 display_dissector_table_names(const char *table_name, const char *ui_name,
391 if ((prev_display_dissector_name == NULL) ||
392 (strcmp(prev_display_dissector_name, table_name) != 0)) {
393 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
394 prev_display_dissector_name = table_name;
399 * For a dissector handle, print on the stream described by output,
400 * the filter name (which is what's used in the "-d" option) and the full
401 * name for the protocol that corresponds to this handle.
404 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
407 const gchar *proto_filter_name;
408 const gchar *proto_ui_name;
410 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
412 if (proto_id != -1) {
413 proto_filter_name = proto_get_protocol_filter_name(proto_id);
414 proto_ui_name = proto_get_protocol_name(proto_id);
415 g_assert(proto_filter_name != NULL);
416 g_assert(proto_ui_name != NULL);
418 if ((prev_display_dissector_name == NULL) ||
419 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
420 fprintf((FILE *)output, "\t%s (%s)\n",
423 prev_display_dissector_name = proto_filter_name;
429 * The protocol_name_search structure is used by find_protocol_name_func()
430 * to pass parameters and store results
432 struct protocol_name_search{
433 gchar *searched_name; /* Protocol filter name we are looking for */
434 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
435 guint nb_match; /* How many dissectors matched searched_name */
437 typedef struct protocol_name_search *protocol_name_search_t;
440 * This function parses all dissectors associated with a table to find the
441 * one whose protocol has the specified filter name. It is called
442 * as a reference function in a call to dissector_table_foreach_handle.
443 * The name we are looking for, as well as the results, are stored in the
444 * protocol_name_search struct pointed to by user_data.
445 * If called using dissector_table_foreach_handle, we actually parse the
446 * whole list of dissectors.
449 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
453 const gchar *protocol_filter_name;
454 protocol_name_search_t search_info;
458 search_info = (protocol_name_search_t)user_data;
460 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
461 if (proto_id != -1) {
462 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
463 g_assert(protocol_filter_name != NULL);
464 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
466 if (search_info->nb_match == 0) {
467 /* Record this handle only if this is the first match */
468 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
470 search_info->nb_match++;
476 * Allow dissector key names to be sorted alphabetically
480 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
482 return strcmp((const char*)dissector_a, (const char*)dissector_b);
486 * Print all layer type names supported.
487 * We send the output to the stream described by the handle output.
491 fprint_all_layer_types(FILE *output)
494 prev_display_dissector_name = NULL;
495 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
499 * Print all protocol names supported for a specific layer type.
500 * table_name contains the layer type name in which the search is performed.
501 * We send the output to the stream described by the handle output.
505 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
508 prev_display_dissector_name = NULL;
509 dissector_table_foreach_handle(table_name,
510 display_dissector_names,
515 * The function below parses the command-line parameters for the decode as
516 * feature (a string pointer by cl_param).
517 * It checks the format of the command-line, searches for a matching table
518 * and dissector. If a table/dissector match is not found, we display a
519 * summary of the available tables/dissectors (on stderr) and return FALSE.
520 * If everything is fine, we get the "Decode as" preference activated,
521 * then we return TRUE.
524 add_decode_as(const gchar *cl_param)
527 guint32 selector, selector2;
528 gchar *decoded_param;
529 gchar *remaining_param;
531 gchar *dissector_str;
532 dissector_handle_t dissector_matching;
533 dissector_table_t table_matching;
534 ftenum_t dissector_table_selector_type;
535 struct protocol_name_search user_protocol_name;
539 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
542 decoded_param = g_strdup(cl_param);
543 g_assert(decoded_param);
546 /* The lines below will parse this string (modifying it) to extract all
547 necessary information. Note that decoded_param is still needed since
548 strings are not copied - we just save pointers. */
550 /* This section extracts a layer type (table_name) from decoded_param */
551 table_name = decoded_param; /* Layer type string starts from beginning */
553 remaining_param = strchr(table_name, '=');
554 if (remaining_param == NULL) {
555 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
556 /* If the argument does not follow the template, carry on anyway to check
557 if the table name is at least correct. If remaining_param is NULL,
558 we'll exit anyway further down */
561 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
564 /* Remove leading and trailing spaces from the table name */
565 while ( table_name[0] == ' ' )
567 while ( table_name[strlen(table_name) - 1] == ' ' )
568 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
570 /* The following part searches a table matching with the layer type specified */
571 table_matching = NULL;
573 /* Look for the requested table */
574 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
575 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
578 table_matching = find_dissector_table(table_name);
579 if (!table_matching) {
580 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
584 if (!table_matching) {
585 /* Display a list of supported layer types to help the user, if the
586 specified layer type was not found */
587 cmdarg_err("Valid layer types are:");
588 fprint_all_layer_types(stderr);
590 if (remaining_param == NULL || !table_matching) {
591 /* Exit if the layer type was not found, or if no '=' separator was found
593 g_free(decoded_param);
597 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
598 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
601 remaining_param++; /* Move to the second '=' */
602 *remaining_param = '\0'; /* Remove the second '=' */
604 remaining_param++; /* Position after the layer type string */
606 /* This section extracts a selector value (selector_str) from decoded_param */
608 selector_str = remaining_param; /* Next part starts with the selector number */
610 remaining_param = strchr(selector_str, ',');
611 if (remaining_param == NULL) {
612 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
613 /* If the argument does not follow the template, carry on anyway to check
614 if the selector value is at least correct. If remaining_param is NULL,
615 we'll exit anyway further down */
618 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
621 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
623 switch (dissector_table_selector_type) {
629 /* The selector for this table is an unsigned number. Parse it as such.
630 There's no need to remove leading and trailing spaces from the
631 selector number string, because sscanf will do that for us. */
632 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
637 if (op != ':' && op != '-') {
638 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
639 g_free(decoded_param);
643 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
644 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
645 g_free(decoded_param);
649 else if (selector2 < selector) {
650 /* We could swap them for the user, but maybe it's better to call
651 * this out as an error in case it's not what was intended? */
652 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
653 g_free(decoded_param);
658 cmdarg_err("Invalid selector number \"%s\"", selector_str);
659 g_free(decoded_param);
666 /* The selector for this table is a string. */
670 /* There are currently no dissector tables with any types other
671 than the ones listed above. */
672 g_assert_not_reached();
675 if (remaining_param == NULL) {
676 /* Exit if no ',' separator was found (see above) */
677 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
678 fprint_all_protocols_for_layer_types(stderr, table_name);
679 g_free(decoded_param);
683 remaining_param++; /* Position after the selector number string */
685 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
687 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
689 /* Remove leading and trailing spaces from the dissector name */
690 while ( dissector_str[0] == ' ' )
692 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
693 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
695 dissector_matching = NULL;
697 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
698 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 */
699 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
702 user_protocol_name.nb_match = 0;
703 user_protocol_name.searched_name = dissector_str;
704 user_protocol_name.matched_handle = NULL;
706 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 */
708 if (user_protocol_name.nb_match != 0) {
709 dissector_matching = user_protocol_name.matched_handle;
710 if (user_protocol_name.nb_match > 1) {
711 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
715 /* OK, check whether the problem is that there isn't any such
716 protocol, or that there is but it's not specified as a protocol
717 that's valid for that dissector table.
718 Note, we don't exit here, but dissector_matching will remain NULL,
720 if (proto_get_id_by_filter_name(dissector_str) == -1) {
721 /* No such protocol */
722 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
724 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
725 dissector_str, table_name);
730 if (!dissector_matching) {
731 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
732 fprint_all_protocols_for_layer_types(stderr, table_name);
733 g_free(decoded_param);
737 /* This is the end of the code that parses the command-line options.
738 All information is now stored in the variables:
742 The above variables that are strings are still pointing to areas within
743 decoded_parm. decoded_parm thus still needs to be kept allocated in
744 until we stop needing these variables
745 decoded_param will be deallocated at each exit point of this function */
748 /* We now have a pointer to the handle for the requested dissector
749 (requested protocol) inside the variable dissector_matching */
750 switch (dissector_table_selector_type) {
756 /* The selector for this table is an unsigned number. */
758 dissector_change_uint(table_name, selector, dissector_matching);
759 } else if (op == ':') {
760 for (i = selector; i < (guint64)selector + selector2; i++) {
761 dissector_change_uint(table_name, (guint32)i, dissector_matching);
763 } else { /* op == '-' */
764 for (i = selector; i <= selector2; i++) {
765 dissector_change_uint(table_name, (guint32)i, dissector_matching);
772 /* The selector for this table is a string. */
773 dissector_change_string(table_name, selector_str, dissector_matching);
777 /* There are currently no dissector tables with any types other
778 than the ones listed above. */
779 g_assert_not_reached();
781 g_free(decoded_param); /* "Decode As" rule has been successfully added */
786 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
787 const gchar *message, gpointer user_data)
789 /* ignore log message, if log_level isn't interesting based
790 upon the console log preferences.
791 If the preferences haven't been loaded loaded yet, display the
794 The default console_log_level preference value is such that only
795 ERROR, CRITICAL and WARNING level messages are processed;
796 MESSAGE, INFO and DEBUG level messages are ignored.
798 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
799 ERROR and CRITICAL level messages so the current code is a behavioral
800 change. The current behavior is the same as in Wireshark.
802 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
803 prefs.console_log_level != 0) {
807 g_log_default_handler(log_domain, log_level, message, user_data);
812 output_file_description(const char *fname)
814 char *save_file_string;
816 /* Get a string that describes what we're writing to */
817 if (strcmp(fname, "-") == 0) {
818 /* We're writing to the standard output */
819 save_file_string = g_strdup("standard output");
821 /* We're writing to a file with the name in save_file */
822 save_file_string = g_strdup_printf("file \"%s\"", fname);
824 return save_file_string;
828 print_current_user(void) {
829 gchar *cur_user, *cur_group;
831 if (started_with_special_privs()) {
832 cur_user = get_cur_username();
833 cur_group = get_cur_groupname();
834 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
835 cur_user, cur_group);
838 if (running_with_special_privs()) {
839 fprintf(stderr, " This could be dangerous.");
841 fprintf(stderr, "\n");
846 check_capture_privs(void) {
849 /* Warn the user if npf.sys isn't loaded. */
850 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
851 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
852 "capturing or\nlisting interfaces.\n");
858 show_version(GString *comp_info_str, GString *runtime_info_str)
860 printf("TShark " VERSION "%s\n"
867 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
868 runtime_info_str->str);
872 main(int argc, char *argv[])
874 GString *comp_info_str;
875 GString *runtime_info_str;
876 char *init_progfile_dir_error;
878 struct option long_options[] = {
879 {"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
882 gboolean arg_error = FALSE;
888 char *gpf_path, *pf_path;
889 char *gdp_path, *dp_path;
890 int gpf_open_errno, gpf_read_errno;
891 int pf_open_errno, pf_read_errno;
892 int gdp_open_errno, gdp_read_errno;
893 int dp_open_errno, dp_read_errno;
895 volatile int exit_status = 0;
897 gboolean list_link_layer_types = FALSE;
898 gboolean start_capture = FALSE;
903 gboolean capture_option_specified = FALSE;
905 gboolean quiet = FALSE;
906 #ifdef PCAP_NG_DEFAULT
907 volatile int out_file_type = WTAP_FILE_PCAPNG;
909 volatile int out_file_type = WTAP_FILE_PCAP;
911 volatile gboolean out_file_name_res = FALSE;
912 gchar *volatile cf_name = NULL;
913 gchar *rfilter = NULL;
914 gchar *dfilter = NULL;
915 #ifdef HAVE_PCAP_OPEN_DEAD
916 struct bpf_program fcode;
918 dfilter_t *rfcode = NULL;
919 dfilter_t *dfcode = NULL;
924 gchar *output_only = NULL;
926 #ifdef HAVE_PCAP_REMOTE
927 #define OPTSTRING_A "A:"
929 #define OPTSTRING_A ""
932 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
933 #define OPTSTRING_B "B:"
935 #define OPTSTRING_B ""
936 #endif /* _WIN32 or HAVE_PCAP_CREATE */
937 #else /* HAVE_LIBPCAP */
938 #define OPTSTRING_B ""
939 #endif /* HAVE_LIBPCAP */
941 #ifdef HAVE_PCAP_CREATE
942 #define OPTSTRING_I "I"
944 #define OPTSTRING_I ""
947 /* the leading - ensures that getopt() does not permute the argv[] entries
948 we have to make sure that the first getopt() preserves the content of argv[]
949 for the subsequent getopt_long() call */
950 #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:"
952 static const char optstring[] = OPTSTRING;
954 /* Assemble the compile-time version information string */
955 comp_info_str = g_string_new("Compiled ");
956 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
958 /* Assemble the run-time version information string */
959 runtime_info_str = g_string_new("Running ");
960 get_runtime_version_info(runtime_info_str, NULL);
962 /* Add it to the information to be reported on a crash. */
963 ws_add_crash_info("TShark " VERSION "%s\n"
968 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
971 arg_list_utf_16to8(argc, argv);
972 create_app_running_mutex();
973 #if !GLIB_CHECK_VERSION(2,31,0)
979 * Get credential information for later use.
981 init_process_policies();
984 * Attempt to get the pathname of the executable file.
986 init_progfile_dir_error = init_progfile_dir(argv[0], main);
987 if (init_progfile_dir_error != NULL) {
988 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
989 init_progfile_dir_error);
993 * In order to have the -X opts assigned before the wslua machine starts
994 * we need to call getopts before epan_init() gets called.
997 optind_initial = optind;
999 while ((opt = getopt(argc, argv, optstring)) != -1) {
1001 case 'C': /* Configuration Profile */
1002 if (profile_exists (optarg, FALSE)) {
1003 set_profile_name (optarg);
1005 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1009 case 'P': /* Print packet summary info even when writing to a file */
1010 print_packet_info = TRUE;
1011 print_summary = TRUE;
1013 case 'O': /* Only output these protocols */
1014 output_only = g_strdup(optarg);
1016 case 'V': /* Verbose */
1017 print_details = TRUE;
1018 print_packet_info = TRUE;
1020 case 'x': /* Print packet data in hex (and ASCII) */
1022 /* The user asked for hex output, so let's ensure they get it,
1023 * even if they're writing to a file.
1025 print_packet_info = TRUE;
1036 * Print packet summary information is the default, unless either -V or -x
1037 * were specified and -P was not. Note that this is new behavior, which
1038 * allows for the possibility of printing only hex/ascii output without
1039 * necessarily requiring that either the summary or details be printed too.
1041 if (print_summary == -1)
1042 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1044 optind = optind_initial;
1049 /** Send All g_log messages to our own handler **/
1053 G_LOG_LEVEL_CRITICAL|
1054 G_LOG_LEVEL_WARNING|
1055 G_LOG_LEVEL_MESSAGE|
1058 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1060 g_log_set_handler(NULL,
1061 (GLogLevelFlags)log_flags,
1062 tshark_log_handler, NULL /* user_data */);
1063 g_log_set_handler(LOG_DOMAIN_MAIN,
1064 (GLogLevelFlags)log_flags,
1065 tshark_log_handler, NULL /* user_data */);
1068 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1069 (GLogLevelFlags)log_flags,
1070 tshark_log_handler, NULL /* user_data */);
1071 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1072 (GLogLevelFlags)log_flags,
1073 tshark_log_handler, NULL /* user_data */);
1076 initialize_funnel_ops();
1079 capture_opts_init(&global_capture_opts);
1080 capture_session_init(&global_capture_session, (void *)&cfile);
1083 timestamp_set_type(TS_RELATIVE);
1084 timestamp_set_precision(TS_PREC_AUTO);
1085 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1087 /* Register all dissectors; we must do this before checking for the
1088 "-G" flag, as the "-G" flag dumps information registered by the
1089 dissectors, and we must do it before we read the preferences, in
1090 case any dissectors register preferences. */
1091 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1092 failure_message, open_failure_message, read_failure_message,
1093 write_failure_message);
1095 /* Register all tap listeners; we do this before we parse the arguments,
1096 as the "-z" argument can specify a registered tap. */
1098 /* we register the plugin taps before the other taps because
1099 stats_tree taps plugins will be registered as tap listeners
1100 by stats_tree_stat.c and need to registered before that */
1102 register_all_plugin_tap_listeners();
1104 register_all_tap_listeners();
1106 /* If invoked with the "-G" flag, we dump out information based on
1107 the argument to the "-G" flag; if no argument is specified,
1108 for backwards compatibility we dump out a glossary of display
1111 XXX - we do this here, for now, to support "-G" with no arguments.
1112 If none of our build or other processes uses "-G" with no arguments,
1113 we can just process it with the other arguments. */
1114 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1115 proto_initialize_all_prefixes();
1118 proto_registrar_dump_fields();
1120 if (strcmp(argv[2], "fields") == 0)
1121 proto_registrar_dump_fields();
1122 else if (strcmp(argv[2], "protocols") == 0)
1123 proto_registrar_dump_protocols();
1124 else if (strcmp(argv[2], "values") == 0)
1125 proto_registrar_dump_values();
1126 else if (strcmp(argv[2], "ftypes") == 0)
1127 proto_registrar_dump_ftypes();
1128 else if (strcmp(argv[2], "decodes") == 0)
1129 dissector_dump_decodes();
1130 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1131 dissector_dump_heur_decodes();
1132 else if (strcmp(argv[2], "defaultprefs") == 0)
1134 else if (strcmp(argv[2], "plugins") == 0)
1136 else if (strcmp(argv[2], "?") == 0)
1137 glossary_option_help();
1138 else if (strcmp(argv[2], "-?") == 0)
1139 glossary_option_help();
1140 else if (strcmp(argv[2], "currentprefs") == 0) {
1141 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1142 &pf_open_errno, &pf_read_errno, &pf_path);
1145 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1152 /* Set the C-language locale to the native environment. */
1153 setlocale(LC_ALL, "");
1155 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1156 &pf_open_errno, &pf_read_errno, &pf_path);
1157 if (gpf_path != NULL) {
1158 if (gpf_open_errno != 0) {
1159 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1160 pf_path, g_strerror(gpf_open_errno));
1162 if (gpf_read_errno != 0) {
1163 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1164 pf_path, g_strerror(gpf_read_errno));
1167 if (pf_path != NULL) {
1168 if (pf_open_errno != 0) {
1169 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1170 g_strerror(pf_open_errno));
1172 if (pf_read_errno != 0) {
1173 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1174 pf_path, g_strerror(pf_read_errno));
1180 /* Read the disabled protocols file. */
1181 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1182 &dp_path, &dp_open_errno, &dp_read_errno);
1183 if (gdp_path != NULL) {
1184 if (gdp_open_errno != 0) {
1185 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1186 gdp_path, g_strerror(gdp_open_errno));
1188 if (gdp_read_errno != 0) {
1189 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1190 gdp_path, g_strerror(gdp_read_errno));
1194 if (dp_path != NULL) {
1195 if (dp_open_errno != 0) {
1197 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1198 g_strerror(dp_open_errno));
1200 if (dp_read_errno != 0) {
1202 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1203 g_strerror(dp_read_errno));
1208 check_capture_privs();
1210 cap_file_init(&cfile);
1212 /* Print format defaults to this. */
1213 print_format = PR_FMT_TEXT;
1215 output_fields = output_fields_new();
1217 /* Now get our args */
1218 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1220 case '2': /* Perform two pass analysis */
1221 perform_two_pass_analysis = TRUE;
1223 case 'a': /* autostop criteria */
1224 case 'b': /* Ringbuffer option */
1225 case 'c': /* Capture x packets */
1226 case 'f': /* capture filter */
1227 case 'g': /* enable group read access on file(s) */
1228 case 'i': /* Use interface x */
1229 case 'p': /* Don't capture in promiscuous mode */
1230 #ifdef HAVE_PCAP_REMOTE
1231 case 'A': /* Authentication */
1233 #ifdef HAVE_PCAP_CREATE
1234 case 'I': /* Capture in monitor mode, if available */
1236 case 's': /* Set the snapshot (capture) length */
1237 case 'w': /* Write to capture file x */
1238 case 'y': /* Set the pcap data link type */
1239 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1240 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1241 case 'B': /* Buffer size */
1242 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1244 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1249 capture_option_specified = TRUE;
1254 /* Configuration profile settings were already processed just ignore them this time*/
1256 case 'd': /* Decode as rule */
1257 if (!add_decode_as(optarg))
1260 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1261 case 'K': /* Kerberos keytab file */
1262 read_keytab_file(optarg);
1265 case 'D': /* Print a list of capture devices and exit */
1267 if_list = capture_interface_list(&err, &err_str,NULL);
1268 if (if_list == NULL) {
1270 case CANT_GET_INTERFACE_LIST:
1271 case DONT_HAVE_PCAP:
1272 cmdarg_err("%s", err_str);
1276 case NO_INTERFACES_FOUND:
1277 cmdarg_err("There are no interfaces on which a capture can be done");
1282 capture_opts_print_interfaces(if_list);
1283 free_interface_list(if_list);
1286 capture_option_specified = TRUE;
1292 output_fields_add(output_fields, optarg);
1296 if (!output_fields_set_option(output_fields, optarg)) {
1297 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1298 output_fields_list_options(stderr);
1303 out_file_type = wtap_short_string_to_file_type(optarg);
1304 if (out_file_type < 0) {
1305 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1306 list_capture_types();
1310 case 'W': /* Select extra information to save in our capture file */
1311 /* This is patterned after the -N flag which may not be the best idea. */
1312 if (strchr(optarg, 'n')) {
1313 out_file_name_res = TRUE;
1315 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1319 case 'H': /* Read address to name mappings from a hosts file */
1320 if (! add_hosts_file(optarg))
1322 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1325 out_file_name_res = TRUE;
1328 case 'h': /* Print help and exit */
1332 case 'l': /* "Line-buffer" standard output */
1333 /* This isn't line-buffering, strictly speaking, it's just
1334 flushing the standard output after the information for
1335 each packet is printed; however, that should be good
1336 enough for all the purposes to which "-l" is put (and
1337 is probably actually better for "-V", as it does fewer
1340 See the comment in "process_packet()" for an explanation of
1341 why we do that, and why we don't just use "setvbuf()" to
1342 make the standard output line-buffered (short version: in
1343 Windows, "line-buffered" is the same as "fully-buffered",
1344 and the output buffer is only flushed when it fills up). */
1345 line_buffered = TRUE;
1347 case 'L': /* Print list of link-layer types and exit */
1349 list_link_layer_types = TRUE;
1351 capture_option_specified = TRUE;
1355 case 'n': /* No name resolution */
1356 gbl_resolv_flags.mac_name = FALSE;
1357 gbl_resolv_flags.network_name = FALSE;
1358 gbl_resolv_flags.transport_name = FALSE;
1359 gbl_resolv_flags.concurrent_dns = FALSE;
1361 case 'N': /* Select what types of addresses/port #s to resolve */
1362 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1363 if (badopt != '\0') {
1364 cmdarg_err("-N specifies unknown resolving option '%c';",
1366 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1370 case 'o': /* Override preference from command line */
1371 switch (prefs_set_pref(optarg)) {
1376 case PREFS_SET_SYNTAX_ERR:
1377 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1381 case PREFS_SET_NO_SUCH_PREF:
1382 case PREFS_SET_OBSOLETE:
1383 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1388 case 'q': /* Quiet */
1391 case 'Q': /* Really quiet */
1393 really_quiet = TRUE;
1395 case 'r': /* Read capture file x */
1396 cf_name = g_strdup(optarg);
1398 case 'R': /* Read file filter */
1402 /* already processed; just ignore it now */
1404 case 'S': /* Set the line Separator to be printed between packets */
1405 separator = strdup(optarg);
1407 case 't': /* Time stamp type */
1408 if (strcmp(optarg, "r") == 0)
1409 timestamp_set_type(TS_RELATIVE);
1410 else if (strcmp(optarg, "a") == 0)
1411 timestamp_set_type(TS_ABSOLUTE);
1412 else if (strcmp(optarg, "ad") == 0)
1413 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1414 else if (strcmp(optarg, "d") == 0)
1415 timestamp_set_type(TS_DELTA);
1416 else if (strcmp(optarg, "dd") == 0)
1417 timestamp_set_type(TS_DELTA_DIS);
1418 else if (strcmp(optarg, "e") == 0)
1419 timestamp_set_type(TS_EPOCH);
1420 else if (strcmp(optarg, "u") == 0)
1421 timestamp_set_type(TS_UTC);
1422 else if (strcmp(optarg, "ud") == 0)
1423 timestamp_set_type(TS_UTC_WITH_DATE);
1425 cmdarg_err("Invalid time stamp type \"%s\"",
1427 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1428 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1429 cmdarg_err_cont("or \"ud\" for UTC with date.");
1433 case 'T': /* printing Type */
1434 if (strcmp(optarg, "text") == 0) {
1435 output_action = WRITE_TEXT;
1436 print_format = PR_FMT_TEXT;
1437 } else if (strcmp(optarg, "ps") == 0) {
1438 output_action = WRITE_TEXT;
1439 print_format = PR_FMT_PS;
1440 } else if (strcmp(optarg, "pdml") == 0) {
1441 output_action = WRITE_XML;
1442 print_details = TRUE; /* Need details */
1443 print_summary = FALSE; /* Don't allow summary */
1444 } else if (strcmp(optarg, "psml") == 0) {
1445 output_action = WRITE_XML;
1446 print_details = FALSE; /* Don't allow details */
1447 print_summary = TRUE; /* Need summary */
1448 } else if (strcmp(optarg, "fields") == 0) {
1449 output_action = WRITE_FIELDS;
1450 print_details = TRUE; /* Need full tree info */
1451 print_summary = FALSE; /* Don't allow summary */
1453 cmdarg_err("Invalid -T parameter.");
1454 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1458 case 'u': /* Seconds type */
1459 if (strcmp(optarg, "s") == 0)
1460 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1461 else if (strcmp(optarg, "hms") == 0)
1462 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1464 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1465 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1469 case 'v': /* Show version and exit */
1471 show_version(comp_info_str, runtime_info_str);
1472 g_string_free(comp_info_str, TRUE);
1473 g_string_free(runtime_info_str, TRUE);
1474 /* We don't really have to cleanup here, but it's a convenient way to test
1475 * start-up and shut-down of the epan library without any UI-specific
1476 * cruft getting in the way. Makes the results of running
1477 * $ ./tools/valgrind-wireshark -n
1478 * much more useful. */
1482 case 'O': /* Only output these protocols */
1483 /* already processed; just ignore it now */
1485 case 'V': /* Verbose */
1486 /* already processed; just ignore it now */
1488 case 'x': /* Print packet data in hex (and ASCII) */
1489 /* already processed; just ignore it now */
1497 /* We won't call the init function for the stat this soon
1498 as it would disallow MATE's fields (which are registered
1499 by the preferences set callback) from being used as
1500 part of a tap filter. Instead, we just add the argument
1501 to a list of stat arguments. */
1502 if (!process_stat_cmd_arg(optarg)) {
1503 if (strcmp("help", optarg)==0) {
1504 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1505 list_stat_cmd_args();
1508 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1509 cmdarg_err_cont(" -z argument must be one of :");
1510 list_stat_cmd_args();
1515 case '?': /* Bad flag - print usage message */
1518 list_capture_types();
1528 /* If we specified output fields, but not the output field type... */
1529 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1530 cmdarg_err("Output fields were specified with \"-e\", "
1531 "but \"-Tfields\" was not specified.");
1533 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1534 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1535 "specified with \"-e\".");
1540 /* If no capture filter or display filter has been specified, and there are
1541 still command-line arguments, treat them as the tokens of a capture
1542 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1543 flag was specified. */
1544 if (optind < argc) {
1545 if (cf_name != NULL) {
1546 if (dfilter != NULL) {
1547 cmdarg_err("Display filters were specified both with \"-d\" "
1548 "and with additional command-line arguments.");
1551 dfilter = get_args_as_string(argc, argv, optind);
1556 if (global_capture_opts.default_options.cfilter) {
1557 cmdarg_err("A default capture filter was specified both with \"-f\""
1558 " and with additional command-line arguments.");
1561 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1562 interface_options interface_opts;
1563 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1564 if (interface_opts.cfilter == NULL) {
1565 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1566 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1567 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1569 cmdarg_err("A capture filter was specified both with \"-f\""
1570 " and with additional command-line arguments.");
1574 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1576 capture_option_specified = TRUE;
1582 if (!global_capture_opts.saving_to_file) {
1583 /* We're not saving the capture to a file; if "-q" wasn't specified,
1584 we should print packet information */
1586 print_packet_info = TRUE;
1588 /* We're saving to a file; if we're writing to the standard output.
1589 and we'll also be writing dissected packets to the standard
1590 output, reject the request. At best, we could redirect that
1591 to the standard error; we *can't* write both to the standard
1592 output and have either of them be useful. */
1593 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1594 cmdarg_err("You can't write both raw packet data and dissected packets"
1595 " to the standard output.");
1600 /* We're not saving the capture to a file; if "-q" wasn't specified,
1601 we should print packet information */
1603 print_packet_info = TRUE;
1606 #ifndef HAVE_LIBPCAP
1607 if (capture_option_specified)
1608 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1616 if (output_action != WRITE_TEXT) {
1617 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1622 if (output_only != NULL) {
1625 if (!print_details) {
1626 cmdarg_err("-O requires -V");
1630 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1631 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1632 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1636 if (rfilter != NULL && !perform_two_pass_analysis) {
1637 /* Just a warning, so we don't return */
1638 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1642 if (list_link_layer_types) {
1643 /* We're supposed to list the link-layer types for an interface;
1644 did the user also specify a capture file to be read? */
1646 /* Yes - that's bogus. */
1647 cmdarg_err("You can't specify -L and a capture file to be read.");
1650 /* No - did they specify a ring buffer option? */
1651 if (global_capture_opts.multi_files_on) {
1652 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1658 * "-r" was specified, so we're reading a capture file.
1659 * Capture options don't apply here.
1662 /* We don't support capture filters when reading from a capture file
1663 (the BPF compiler doesn't support all link-layer types that we
1664 support in capture files we read). */
1665 if (global_capture_opts.default_options.cfilter) {
1666 cmdarg_err("Only read filters, not capture filters, "
1667 "can be specified when reading a capture file.");
1670 if (global_capture_opts.multi_files_on) {
1671 cmdarg_err("Multiple capture files requested, but "
1672 "a capture isn't being done.");
1675 if (global_capture_opts.has_file_duration) {
1676 cmdarg_err("Switching capture files after a time interval was specified, but "
1677 "a capture isn't being done.");
1680 if (global_capture_opts.has_ring_num_files) {
1681 cmdarg_err("A ring buffer of capture files was specified, but "
1682 "a capture isn't being done.");
1685 if (global_capture_opts.has_autostop_files) {
1686 cmdarg_err("A maximum number of capture files was specified, but "
1687 "a capture isn't being done.");
1690 if (global_capture_opts.capture_comment) {
1691 cmdarg_err("A capture comment was specified, but "
1692 "a capture isn't being done.\nThere's no support for adding "
1693 "a capture comment to an existing capture file.");
1697 /* Note: TShark now allows the restriction of a _read_ file by packet count
1698 * and byte count as well as a write file. Other autostop options remain valid
1699 * only for a write file.
1701 if (global_capture_opts.has_autostop_duration) {
1702 cmdarg_err("A maximum capture time was specified, but "
1703 "a capture isn't being done.");
1708 * "-r" wasn't specified, so we're doing a live capture.
1710 if (global_capture_opts.saving_to_file) {
1711 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1713 /* When capturing, we only support writing pcap or pcap-ng format. */
1714 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1715 cmdarg_err("Live captures can only be saved in libpcap format.");
1718 if (global_capture_opts.capture_comment && out_file_type != WTAP_FILE_PCAPNG) {
1719 cmdarg_err("A capture comment can only be written to a pcapng file.");
1722 if (global_capture_opts.multi_files_on) {
1723 /* Multiple-file mode doesn't work under certain conditions:
1724 a) it doesn't work if you're writing to the standard output;
1725 b) it doesn't work if you're writing to a pipe;
1727 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1728 cmdarg_err("Multiple capture files requested, but "
1729 "the capture is being written to the standard output.");
1732 if (global_capture_opts.output_to_pipe) {
1733 cmdarg_err("Multiple capture files requested, but "
1734 "the capture file is a pipe.");
1737 if (!global_capture_opts.has_autostop_filesize &&
1738 !global_capture_opts.has_file_duration) {
1739 cmdarg_err("Multiple capture files requested, but "
1740 "no maximum capture file size or duration was specified.");
1744 /* Currently, we don't support read or display filters when capturing
1745 and saving the packets. */
1746 if (rfilter != NULL) {
1747 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1750 if (dfilter != NULL) {
1751 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1755 /* They didn't specify a "-w" flag, so we won't be saving to a
1756 capture file. Check for options that only make sense if
1757 we're saving to a file. */
1758 if (global_capture_opts.has_autostop_filesize) {
1759 cmdarg_err("Maximum capture file size specified, but "
1760 "capture isn't being saved to a file.");
1763 if (global_capture_opts.multi_files_on) {
1764 cmdarg_err("Multiple capture files requested, but "
1765 "the capture isn't being saved to a file.");
1768 if (global_capture_opts.capture_comment) {
1769 cmdarg_err("A capture comment was specified, but "
1770 "the capture isn't being saved to a file.");
1779 /* Start windows sockets */
1780 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1783 /* Notify all registered modules that have had any of their preferences
1784 changed either from one of the preferences file or from the command
1785 line that their preferences have changed. */
1788 /* At this point MATE will have registered its field array so we can
1789 have a tap filter with one of MATE's late-registered fields as part
1790 of the filter. We can now process all the "-z" arguments. */
1791 start_requested_stats();
1794 /* We currently don't support taps, or printing dissected packets,
1795 if we're writing to a pipe. */
1796 if (global_capture_opts.saving_to_file &&
1797 global_capture_opts.output_to_pipe) {
1798 if (tap_listeners_require_dissection()) {
1799 cmdarg_err("Taps aren't supported when saving to a pipe.");
1802 if (print_packet_info) {
1803 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1809 /* disabled protocols as per configuration file */
1810 if (gdp_path == NULL && dp_path == NULL) {
1811 set_disabled_protos_list();
1814 /* Build the column format array */
1815 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1818 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1819 capture_opts_trim_ring_num_files(&global_capture_opts);
1822 if (rfilter != NULL) {
1823 if (!dfilter_compile(rfilter, &rfcode)) {
1824 cmdarg_err("%s", dfilter_error_msg);
1826 #ifdef HAVE_PCAP_OPEN_DEAD
1830 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1832 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1834 " Note: That read filter code looks like a valid capture filter;");
1836 " maybe you mixed them up?");
1845 cfile.rfcode = rfcode;
1847 if (dfilter != NULL) {
1848 if (!dfilter_compile(dfilter, &dfcode)) {
1849 cmdarg_err("%s", dfilter_error_msg);
1851 #ifdef HAVE_PCAP_OPEN_DEAD
1855 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1857 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1859 " Note: That display filter code looks like a valid capture filter;");
1861 " maybe you mixed them up?");
1870 cfile.dfcode = dfcode;
1872 if (print_packet_info) {
1873 /* If we're printing as text or PostScript, we have
1874 to create a print stream. */
1875 if (output_action == WRITE_TEXT) {
1876 switch (print_format) {
1879 print_stream = print_stream_text_stdio_new(stdout);
1883 print_stream = print_stream_ps_stdio_new(stdout);
1887 g_assert_not_reached();
1892 /* We have to dissect each packet if:
1894 we're printing information about each packet;
1896 we're using a read filter on the packets;
1898 we're using a display filter on the packets;
1900 we're using any taps that need dissection. */
1901 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1905 * We're reading a capture file.
1909 * Immediately relinquish any special privileges we have; we must not
1910 * be allowed to read any capture files the user running TShark
1913 relinquish_special_privs_perm();
1914 print_current_user();
1916 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1921 /* Set timestamp precision; there should arguably be a command-line
1922 option to let the user set this. */
1923 switch(wtap_file_tsprecision(cfile.wth)) {
1924 case(WTAP_FILE_TSPREC_SEC):
1925 timestamp_set_precision(TS_PREC_AUTO_SEC);
1927 case(WTAP_FILE_TSPREC_DSEC):
1928 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1930 case(WTAP_FILE_TSPREC_CSEC):
1931 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1933 case(WTAP_FILE_TSPREC_MSEC):
1934 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1936 case(WTAP_FILE_TSPREC_USEC):
1937 timestamp_set_precision(TS_PREC_AUTO_USEC);
1939 case(WTAP_FILE_TSPREC_NSEC):
1940 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1943 g_assert_not_reached();
1946 /* Process the packets in the file */
1949 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1950 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1951 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1953 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1956 CATCH(OutOfMemoryError) {
1960 "Sorry, but TShark has to terminate now!\n"
1962 "Some infos / workarounds can be found at:\n"
1963 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1968 /* We still dump out the results of taps, etc., as we might have
1969 read some packets; however, we exit with an error status. */
1973 /* No capture file specified, so we're supposed to do a live capture
1974 or get a list of link-layer types for a live capture device;
1975 do we have support for live captures? */
1977 /* if no interface was specified, pick a default */
1978 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1979 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1980 if (exit_status != 0)
1983 /* if requested, list the link layer types and exit */
1984 if (list_link_layer_types) {
1987 /* Get the list of link-layer types for the capture devices. */
1988 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1989 interface_options interface_opts;
1990 if_capabilities_t *caps;
1992 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1993 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1995 cmdarg_err("%s", err_str);
1999 if (caps->data_link_types == NULL) {
2000 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
2003 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
2004 free_if_capabilities(caps);
2009 if (print_packet_info) {
2010 if (!write_preamble(NULL)) {
2011 show_print_file_io_error(errno);
2014 } else if (!quiet) {
2016 * We're not printing information for each packet, and the user
2017 * didn't ask us not to print a count of packets as they arrive,
2018 * so print that count so the user knows that packets are arriving.
2020 * XXX - what if the user wants to do a live capture, doesn't want
2021 * to save it to a file, doesn't want information printed for each
2022 * packet, does want some "-z" statistic, and wants packet counts
2023 * so they know whether they're seeing any packets?
2025 print_packet_counts = TRUE;
2028 /* For now, assume libpcap gives microsecond precision. */
2029 timestamp_set_precision(TS_PREC_AUTO_USEC);
2032 * XXX - this returns FALSE if an error occurred, but it also
2033 * returns FALSE if the capture stops because a time limit
2034 * was reached (and possibly other limits), so we can't assume
2035 * it means an error.
2037 * The capture code is a bit twisty, so it doesn't appear to
2038 * be an easy fix. We just ignore the return value for now.
2039 * Instead, pass on the exit status from the capture child.
2042 exit_status = global_capture_session.fork_child_status;
2044 if (print_packet_info) {
2045 if (!write_finale()) {
2047 show_print_file_io_error(err);
2051 /* No - complain. */
2052 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2059 if (cfile.frames != NULL) {
2060 free_frame_data_sequence(cfile.frames);
2061 cfile.frames = NULL;
2064 draw_tap_listeners(TRUE);
2065 funnel_dump_all_text_windows();
2068 output_fields_free(output_fields);
2069 output_fields = NULL;
2074 /*#define USE_BROKEN_G_MAIN_LOOP*/
2076 #ifdef USE_BROKEN_G_MAIN_LOOP
2079 gboolean loop_running = FALSE;
2081 guint32 packet_count = 0;
2084 /* XXX - move to the right position / file */
2085 /* read from a pipe (callback) */
2086 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2088 typedef struct pipe_input_tag {
2092 pipe_input_cb_t input_cb;
2093 guint pipe_input_id;
2095 GMutex *callback_running;
2099 static pipe_input_t pipe_input;
2102 /* The timer has expired, see if there's stuff to read from the pipe,
2103 if so, do the callback */
2105 pipe_timer_cb(gpointer data)
2111 pipe_input_t *pipe_input_p = data;
2112 gint iterations = 0;
2114 g_mutex_lock (pipe_input_p->callback_running);
2116 /* try to read data from the pipe only 5 times, to avoid blocking */
2117 while(iterations < 5) {
2118 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2120 /* Oddly enough although Named pipes don't work on win9x,
2121 PeekNamedPipe does !!! */
2122 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2123 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2125 /* Get the child process exit status */
2126 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2129 /* If the Peek returned an error, or there are bytes to be read
2130 or the childwatcher thread has terminated then call the normal
2132 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2134 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2136 /* And call the real handler */
2137 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2138 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2139 /* pipe closed, return false so that the timer is stopped */
2140 g_mutex_unlock (pipe_input_p->callback_running);
2145 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2146 /* No data, stop now */
2153 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2155 g_mutex_unlock (pipe_input_p->callback_running);
2157 /* we didn't stopped the timer, so let it run */
2164 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2167 pipe_input.source = source;
2168 pipe_input.child_process = child_process;
2169 pipe_input.user_data = user_data;
2170 pipe_input.input_cb = input_cb;
2173 #if GLIB_CHECK_VERSION(2,31,0)
2174 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2175 g_mutex_init(pipe_input.callback_running);
2177 pipe_input.callback_running = g_mutex_new();
2179 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2180 do this but that doesn't cover all win32 platforms. GTK can do
2181 this but doesn't seem to work over processes. Attempt to do
2182 something similar here, start a timer and check for data on every
2184 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2185 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2189 static const nstime_t *
2190 tshark_get_frame_ts(void *data, guint32 frame_num)
2192 capture_file *cf = (capture_file *) data;
2194 if (ref && ref->num == frame_num)
2195 return &ref->abs_ts;
2197 if (prev_dis && prev_dis->num == frame_num)
2198 return &prev_dis->abs_ts;
2200 if (prev_cap && prev_cap->num == frame_num)
2201 return &prev_cap->abs_ts;
2204 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2206 return (fd) ? &fd->abs_ts : NULL;
2213 tshark_epan_new(capture_file *cf)
2215 epan_t *epan = epan_new();
2218 epan->get_frame_ts = tshark_get_frame_ts;
2219 epan->get_interface_name = cap_file_get_interface_name;
2220 epan->get_user_comment = NULL;
2231 GString *str = g_string_new("");
2232 #ifdef USE_TSHARK_SELECT
2236 struct sigaction action, oldaction;
2240 * XXX - dropping privileges is still required, until code cleanup is done
2242 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2243 * when it's done, we don't need special privileges to run tshark at all,
2244 * therefore we don't need to drop these privileges
2245 * The only thing we might want to keep is a warning if tshark is run as root,
2246 * as it's no longer necessary and potentially dangerous.
2248 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2249 * We've opened the capture device, so we shouldn't need any special
2250 * privileges any more; relinquish those privileges.
2252 * XXX - if we have saved set-user-ID support, we should give up those
2253 * privileges immediately, and then reclaim them long enough to get
2254 * a list of network interfaces and to open one, and then give them
2255 * up again, so that stuff we do while processing the argument list,
2256 * reading the user's preferences, loading and starting plugins
2257 * (especially *user* plugins), etc. is done with the user's privileges,
2258 * not special privileges.
2260 relinquish_special_privs_perm();
2261 print_current_user();
2263 /* Create new dissection section. */
2264 epan_free(cfile.epan);
2265 cfile.epan = tshark_epan_new(&cfile);
2268 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2269 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2271 /* Catch SIGINT and SIGTERM and, if we get either of them,
2272 clean up and exit. If SIGHUP isn't being ignored, catch
2273 it too and, if we get it, clean up and exit.
2275 We restart any read that was in progress, so that it doesn't
2276 disrupt reading from the sync pipe. The signal handler tells
2277 the capture child to finish; it will report that it finished,
2278 or will exit abnormally, so we'll stop reading from the sync
2279 pipe, pick up the exit status, and quit. */
2280 memset(&action, 0, sizeof(action));
2281 action.sa_handler = capture_cleanup;
2282 action.sa_flags = SA_RESTART;
2283 sigemptyset(&action.sa_mask);
2284 sigaction(SIGTERM, &action, NULL);
2285 sigaction(SIGINT, &action, NULL);
2286 sigaction(SIGHUP, NULL, &oldaction);
2287 if (oldaction.sa_handler == SIG_DFL)
2288 sigaction(SIGHUP, &action, NULL);
2291 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2292 quiet mode, report the number of packets we've captured.
2294 Again, restart any read that was in progress, so that it doesn't
2295 disrupt reading from the sync pipe. */
2296 action.sa_handler = report_counts_siginfo;
2297 action.sa_flags = SA_RESTART;
2298 sigemptyset(&action.sa_mask);
2299 sigaction(SIGINFO, &action, NULL);
2300 #endif /* SIGINFO */
2303 global_capture_session.state = CAPTURE_PREPARING;
2305 /* Let the user know which interfaces were chosen. */
2306 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2307 interface_options interface_opts;
2309 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2310 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2311 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2312 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2315 if (global_capture_opts.ifaces->len < 2) {
2317 if (global_capture_opts.ifaces->len < 4) {
2319 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2320 interface_options interface_opts;
2322 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2324 if (global_capture_opts.ifaces->len > 2) {
2325 g_string_append_printf(str, ",");
2327 g_string_append_printf(str, " ");
2328 if (i == global_capture_opts.ifaces->len - 1) {
2329 g_string_append_printf(str, "and ");
2332 g_string_append_printf(str, "'%s'", interface_opts.descr);
2335 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2337 if (really_quiet == FALSE)
2338 fprintf(stderr, "Capturing on %s\n", str->str);
2340 g_string_free(str, TRUE);
2342 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2347 /* the actual capture loop
2349 * XXX - glib doesn't seem to provide any event based loop handling.
2351 * XXX - for whatever reason,
2352 * calling g_main_loop_new() ends up in 100% cpu load.
2354 * But that doesn't matter: in UNIX we can use select() to find an input
2355 * source with something to do.
2357 * But that doesn't matter because we're in a CLI (that doesn't need to
2358 * update a GUI or something at the same time) so it's OK if we block
2359 * trying to read from the pipe.
2361 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2362 * wrong (but I leave it there in case I am...).
2365 #ifdef USE_TSHARK_SELECT
2367 FD_SET(pipe_input.source, &readfds);
2370 loop_running = TRUE;
2374 while (loop_running)
2376 #ifdef USE_TSHARK_SELECT
2377 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2383 } else if (ret == 1) {
2385 /* Call the real handler */
2386 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2387 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2390 #ifdef USE_TSHARK_SELECT
2395 CATCH(OutOfMemoryError) {
2399 "Sorry, but TShark has to terminate now!\n"
2401 "Some infos / workarounds can be found at:\n"
2402 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2409 /* capture child detected an error */
2411 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2413 cmdarg_err("%s", error_msg);
2414 cmdarg_err_cont("%s", secondary_error_msg);
2418 /* capture child detected an capture filter related error */
2420 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2422 capture_options *capture_opts = cap_session->capture_opts;
2423 dfilter_t *rfcode = NULL;
2424 interface_options interface_opts;
2426 g_assert(i < capture_opts->ifaces->len);
2427 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2429 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2431 "Invalid capture filter \"%s\" for interface %s!\n"
2433 "That string looks like a valid display filter; however, it isn't a valid\n"
2434 "capture filter (%s).\n"
2436 "Note that display filters and capture filters don't have the same syntax,\n"
2437 "so you can't use most display filter expressions as capture filters.\n"
2439 "See the User's Guide for a description of the capture filter syntax.",
2440 interface_opts.cfilter, interface_opts.descr, error_message);
2441 dfilter_free(rfcode);
2444 "Invalid capture filter \"%s\" for interface %s!\n"
2446 "That string isn't a valid capture filter (%s).\n"
2447 "See the User's Guide for a description of the capture filter syntax.",
2448 interface_opts.cfilter, interface_opts.descr, error_message);
2453 /* capture child tells us we have a new (or the first) capture file */
2455 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2457 capture_options *capture_opts = cap_session->capture_opts;
2458 gboolean is_tempfile;
2461 if (cap_session->state == CAPTURE_PREPARING) {
2462 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2464 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2466 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2468 /* free the old filename */
2469 if (capture_opts->save_file != NULL) {
2471 /* we start a new capture file, close the old one (if we had one before) */
2472 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2473 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2474 wtap_close(((capture_file *) cap_session->cf)->wth);
2476 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2479 g_free(capture_opts->save_file);
2480 is_tempfile = FALSE;
2482 /* we didn't had a save_file before, must be a tempfile */
2486 /* save the new filename */
2487 capture_opts->save_file = g_strdup(new_file);
2489 /* if we are in real-time mode, open the new file now */
2490 if (do_dissection) {
2491 /* Attempt to open the capture file and set up to read from it. */
2492 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2496 /* Don't unlink (delete) the save file - leave it around,
2497 for debugging purposes. */
2498 g_free(capture_opts->save_file);
2499 capture_opts->save_file = NULL;
2504 cap_session->state = CAPTURE_RUNNING;
2510 /* capture child tells us we have new packets to read */
2512 capture_input_new_packets(capture_session *cap_session, int to_read)
2518 capture_file *cf = (capture_file *)cap_session->cf;
2519 gboolean filtering_tap_listeners;
2524 * Prevent a SIGINFO handler from writing to the standard error while
2525 * we're doing so or writing to the standard output; instead, have it
2526 * just set a flag telling us to print that information when we're done.
2529 #endif /* SIGINFO */
2531 /* Do we have any tap listeners with filters? */
2532 filtering_tap_listeners = have_filtering_tap_listeners();
2534 /* Get the union of the flags for all tap listeners. */
2535 tap_flags = union_of_tap_listener_flags();
2537 if (do_dissection) {
2538 while (to_read-- && cf->wth) {
2539 wtap_cleareof(cf->wth);
2540 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2542 /* read from file failed, tell the capture child to stop */
2543 sync_pipe_stop(cap_session);
2544 wtap_close(cf->wth);
2547 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2548 wtap_buf_ptr(cf->wth),
2549 filtering_tap_listeners, tap_flags);
2552 /* packet successfully read and gone through the "Read Filter" */
2558 * Dumpcap's doing all the work; we're not doing any dissection.
2559 * Count all the packets it wrote.
2561 packet_count += to_read;
2564 if (print_packet_counts) {
2565 /* We're printing packet counts. */
2566 if (packet_count != 0) {
2567 fprintf(stderr, "\r%u ", packet_count);
2568 /* stderr could be line buffered */
2575 * Allow SIGINFO handlers to write.
2580 * If a SIGINFO handler asked us to write out capture counts, do so.
2584 #endif /* SIGINFO */
2590 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2591 /* Report the count only if we aren't printing a packet count
2592 as packets arrive. */
2593 fprintf(stderr, "%u packet%s captured\n", packet_count,
2594 plurality(packet_count, "", "s"));
2597 infoprint = FALSE; /* we just reported it */
2598 #endif /* SIGINFO */
2603 report_counts_siginfo(int signum _U_)
2605 int sav_errno = errno;
2606 /* If we've been told to delay printing, just set a flag asking
2607 that we print counts (if we're supposed to), otherwise print
2608 the count of packets captured (if we're supposed to). */
2615 #endif /* SIGINFO */
2618 /* capture child detected any packet drops? */
2620 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2622 if (print_packet_counts) {
2623 /* We're printing packet counts to stderr.
2624 Send a newline so that we move to the line after the packet count. */
2625 fprintf(stderr, "\n");
2629 /* We're printing packet counts to stderr.
2630 Send a newline so that we move to the line after the packet count. */
2631 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2637 * Capture child closed its side of the pipe, report any error and
2638 * do the required cleanup.
2641 capture_input_closed(capture_session *cap_session, gchar *msg)
2643 capture_file *cf = (capture_file *) cap_session->cf;
2646 fprintf(stderr, "tshark: %s\n", msg);
2650 if (cf != NULL && cf->wth != NULL) {
2651 wtap_close(cf->wth);
2652 if (cf->is_tempfile) {
2653 ws_unlink(cf->filename);
2656 #ifdef USE_BROKEN_G_MAIN_LOOP
2657 /*g_main_loop_quit(loop);*/
2660 loop_running = FALSE;
2669 capture_cleanup(DWORD ctrltype _U_)
2671 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2672 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2673 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2674 like SIGTERM at least when the machine's shutting down.
2676 For now, we handle them all as indications that we should clean up
2677 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2680 We must return TRUE so that no other handler - such as one that would
2681 terminate the process - gets called.
2683 XXX - for some reason, typing ^C to TShark, if you run this in
2684 a Cygwin console window in at least some versions of Cygwin,
2685 causes TShark to terminate immediately; this routine gets
2686 called, but the main loop doesn't get a chance to run and
2687 exit cleanly, at least if this is compiled with Microsoft Visual
2688 C++ (i.e., it's a property of the Cygwin console window or Bash;
2689 it happens if TShark is not built with Cygwin - for all I know,
2690 building it with Cygwin may make the problem go away). */
2692 /* tell the capture child to stop */
2693 sync_pipe_stop(&global_capture_session);
2695 /* don't stop our own loop already here, otherwise status messages and
2696 * cleanup wouldn't be done properly. The child will indicate the stop of
2697 * everything by calling capture_input_closed() later */
2703 capture_cleanup(int signum _U_)
2705 /* tell the capture child to stop */
2706 sync_pipe_stop(&global_capture_session);
2708 /* don't stop our own loop already here, otherwise status messages and
2709 * cleanup wouldn't be done properly. The child will indicate the stop of
2710 * everything by calling capture_input_closed() later */
2713 #endif /* HAVE_LIBPCAP */
2716 process_packet_first_pass(capture_file *cf,
2717 gint64 offset, struct wtap_pkthdr *whdr,
2722 gboolean create_proto_tree = FALSE;
2726 /* The frame number of this packet is one more than the count of
2727 frames in this packet. */
2728 framenum = cf->count + 1;
2730 /* If we're not running a display filter and we're not printing any
2731 packet information, we don't need to do a dissection. This means
2732 that all packets can be marked as 'passed'. */
2735 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2737 /* If we're going to print packet information, or we're going to
2738 run a read filter, or display filter, or we're going to process taps, set up to
2739 do a dissection and do so. */
2740 if (do_dissection) {
2741 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2742 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2743 /* Grab any resolved addresses */
2744 host_name_lookup_process();
2746 /* If we're going to be applying a filter, we'll need to
2747 create a protocol tree against which to apply the filter. */
2749 create_proto_tree = TRUE;
2751 /* We're not going to display the protocol tree on this pass,
2752 so it's not going to be "visible". */
2753 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2755 /* If we're running a read filter, prime the epan_dissect_t with that
2758 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2760 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2762 if (ref == &fdlocal) {
2763 ref_frame = fdlocal;
2767 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2769 /* Run the read filter if we have one. */
2771 passed = dfilter_apply_edt(cf->rfcode, &edt);
2775 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2776 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2778 /* If we're not doing dissection then there won't be any dependent frames.
2779 * More importantly, edt.pi.dependent_frames won't be initialized because
2780 * epan hasn't been initialized.
2782 if (do_dissection) {
2783 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2788 /* if we don't add it to the frame_data_sequence, clean it up right now
2790 frame_data_destroy(&fdlocal);
2794 epan_dissect_cleanup(&edt);
2800 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2801 struct wtap_pkthdr *phdr, Buffer *buf,
2802 gboolean filtering_tap_listeners, guint tap_flags)
2804 gboolean create_proto_tree;
2809 /* If we're not running a display filter and we're not printing any
2810 packet information, we don't need to do a dissection. This means
2811 that all packets can be marked as 'passed'. */
2814 /* If we're going to print packet information, or we're going to
2815 run a read filter, or we're going to process taps, set up to
2816 do a dissection and do so. */
2817 if (do_dissection) {
2818 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2819 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2820 /* Grab any resolved addresses */
2821 host_name_lookup_process();
2823 if (cf->dfcode || print_details || filtering_tap_listeners ||
2824 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2825 create_proto_tree = TRUE;
2827 create_proto_tree = FALSE;
2829 /* The protocol tree will be "visible", i.e., printed, only if we're
2830 printing packet details, which is true if we're printing stuff
2831 ("print_packet_info" is true) and we're in verbose mode
2832 ("packet_details" is true). */
2833 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2835 /* If we're running a display filter, prime the epan_dissect_t with that
2838 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2840 col_custom_prime_edt(&edt, &cf->cinfo);
2842 /* We only need the columns if either
2843 1) some tap needs the columns
2845 2) we're printing packet info but we're *not* verbose; in verbose
2846 mode, we print the protocol tree, not the protocol summary.
2848 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2853 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2860 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2862 /* Run the read/display filter if we have one. */
2864 passed = dfilter_apply_edt(cf->dfcode, &edt);
2868 frame_data_set_after_dissect(fdata, &cum_bytes);
2869 /* Process this packet. */
2870 if (print_packet_info) {
2871 /* We're printing packet information; print the information for
2874 print_packet(cf, &edt);
2876 print_packet(cf, NULL);
2878 /* The ANSI C standard does not appear to *require* that a line-buffered
2879 stream be flushed to the host environment whenever a newline is
2880 written, it just says that, on such a stream, characters "are
2881 intended to be transmitted to or from the host environment as a
2882 block when a new-line character is encountered".
2884 The Visual C++ 6.0 C implementation doesn't do what is intended;
2885 even if you set a stream to be line-buffered, it still doesn't
2886 flush the buffer at the end of every line.
2888 So, if the "-l" flag was specified, we flush the standard output
2889 at the end of a packet. This will do the right thing if we're
2890 printing packet summary lines, and, as we print the entire protocol
2891 tree for a single packet without waiting for anything to happen,
2892 it should be as good as line-buffered mode if we're printing
2893 protocol trees. (The whole reason for the "-l" flag in either
2894 tcpdump or TShark is to allow the output of a live capture to
2895 be piped to a program or script and to have that script see the
2896 information for the packet as soon as it's printed, rather than
2897 having to wait until a standard I/O buffer fills up. */
2901 if (ferror(stdout)) {
2902 show_print_file_io_error(errno);
2910 if (do_dissection) {
2911 epan_dissect_cleanup(&edt);
2913 return passed || fdata->flags.dependent_of_displayed;
2917 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2918 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2921 int snapshot_length;
2925 gchar *err_info = NULL;
2927 char *save_file_string = NULL;
2928 gboolean filtering_tap_listeners;
2930 wtapng_section_t *shb_hdr;
2931 wtapng_iface_descriptions_t *idb_inf;
2935 shb_hdr = wtap_file_get_shb_info(cf->wth);
2936 idb_inf = wtap_file_get_idb_info(cf->wth);
2937 #ifdef PCAP_NG_DEFAULT
2938 if (idb_inf->number_of_interfaces > 1) {
2939 linktype = WTAP_ENCAP_PER_PACKET;
2941 linktype = wtap_file_encap(cf->wth);
2944 linktype = wtap_file_encap(cf->wth);
2946 if (save_file != NULL) {
2947 /* Get a string that describes what we're writing to */
2948 save_file_string = output_file_description(save_file);
2950 /* Set up to write to the capture file. */
2951 snapshot_length = wtap_snapshot_length(cf->wth);
2952 if (snapshot_length == 0) {
2953 /* Snapshot length of input file not known. */
2954 snapshot_length = WTAP_MAX_PACKET_SIZE;
2956 /* If we don't have an application name add Tshark */
2957 if (shb_hdr->shb_user_appl == NULL) {
2958 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2959 shb_hdr->shb_user_appl = appname;
2962 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2963 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2964 snapshot_length, FALSE /* compressed */, &err);
2966 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2967 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2973 /* We couldn't set up to write to the capture file. */
2976 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2977 cmdarg_err("Capture files can't be written in that format.");
2980 case WTAP_ERR_UNSUPPORTED_ENCAP:
2981 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2982 cmdarg_err("The capture file being read can't be written as a "
2983 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2986 case WTAP_ERR_CANT_OPEN:
2987 cmdarg_err("The %s couldn't be created for some "
2988 "unknown reason.", save_file_string);
2991 case WTAP_ERR_SHORT_WRITE:
2992 cmdarg_err("A full header couldn't be written to the %s.",
2997 cmdarg_err("The %s could not be created: %s.", save_file_string,
2998 wtap_strerror(err));
3004 if (print_packet_info) {
3005 if (!write_preamble(cf)) {
3007 show_print_file_io_error(err);
3014 if (pdh && out_file_name_res) {
3015 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
3016 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
3017 wtap_file_type_short_string(out_file_type));
3021 /* Do we have any tap listeners with filters? */
3022 filtering_tap_listeners = have_filtering_tap_listeners();
3024 /* Get the union of the flags for all tap listeners. */
3025 tap_flags = union_of_tap_listener_flags();
3027 if (perform_two_pass_analysis) {
3029 int old_max_packet_count = max_packet_count;
3031 /* Allocate a frame_data_sequence for all the frames. */
3032 cf->frames = new_frame_data_sequence();
3034 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3035 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3036 wtap_buf_ptr(cf->wth))) {
3037 /* Stop reading if we have the maximum number of packets;
3038 * When the -c option has not been used, max_packet_count
3039 * starts at 0, which practically means, never stop reading.
3040 * (unless we roll over max_packet_count ?)
3042 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3043 err = 0; /* This is not an error */
3049 /* Close the sequential I/O side, to free up memory it requires. */
3050 wtap_sequential_close(cf->wth);
3052 /* Allow the protocol dissectors to free up memory that they
3053 * don't need after the sequential run-through of the packets. */
3054 postseq_cleanup_all_protocols();
3056 max_packet_count = old_max_packet_count;
3060 buffer_init(&buf, 1500);
3061 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3062 fdata = frame_data_sequence_find(cf->frames, framenum);
3063 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3064 &buf, fdata->cap_len, &err, &err_info)) {
3065 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3066 filtering_tap_listeners, tap_flags)) {
3067 /* Either there's no read filtering or this packet passed the
3068 filter, so, if we're writing to a capture file, write
3071 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3072 /* Error writing to a capture file */
3075 case WTAP_ERR_UNSUPPORTED_ENCAP:
3077 * This is a problem with the particular frame we're writing;
3078 * note that, and give the frame number.
3080 * XXX - framenum is not necessarily the frame number in
3081 * the input file if there was a read filter.
3084 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3085 framenum, cf->filename,
3086 wtap_file_type_short_string(out_file_type));
3090 show_capture_file_io_error(save_file, err, FALSE);
3093 wtap_dump_close(pdh, &err);
3098 /* Stop reading if we have the maximum number of packets;
3099 * When the -c option has not been used, max_packet_count
3100 * starts at 0, which practically means, never stop reading.
3101 * (unless we roll over max_packet_count ?)
3103 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3104 err = 0; /* This is not an error */
3114 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3117 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3118 wtap_buf_ptr(cf->wth),
3119 filtering_tap_listeners, tap_flags)) {
3120 /* Either there's no read filtering or this packet passed the
3121 filter, so, if we're writing to a capture file, write
3124 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3125 /* Error writing to a capture file */
3128 case WTAP_ERR_UNSUPPORTED_ENCAP:
3130 * This is a problem with the particular frame we're writing;
3131 * note that, and give the frame number.
3134 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3135 framenum, cf->filename,
3136 wtap_file_type_short_string(out_file_type));
3140 show_capture_file_io_error(save_file, err, FALSE);
3143 wtap_dump_close(pdh, &err);
3148 /* Stop reading if we have the maximum number of packets;
3149 * When the -c option has not been used, max_packet_count
3150 * starts at 0, which practically means, never stop reading.
3151 * (unless we roll over max_packet_count ?)
3153 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3154 err = 0; /* This is not an error */
3163 * Print a message noting that the read failed somewhere along the line.
3165 * If we're printing packet data, and the standard output and error are
3166 * going to the same place, flush the standard output, so everything
3167 * buffered up is written, and then print a newline to the standard error
3168 * before printing the error message, to separate it from the packet
3169 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3170 * the _fstat() documentation at Microsoft doesn't indicate whether
3171 * st_ino is even supported.)
3174 if (print_packet_info) {
3175 struct stat stat_stdout, stat_stderr;
3177 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3178 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3179 stat_stdout.st_ino == stat_stderr.st_ino) {
3181 fprintf(stderr, "\n");
3188 case WTAP_ERR_UNSUPPORTED:
3189 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3190 cf->filename, err_info);
3194 case WTAP_ERR_UNSUPPORTED_ENCAP:
3195 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3196 cf->filename, err_info);
3200 case WTAP_ERR_CANT_READ:
3201 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3205 case WTAP_ERR_SHORT_READ:
3206 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3210 case WTAP_ERR_BAD_FILE:
3211 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3212 cf->filename, err_info);
3216 case WTAP_ERR_DECOMPRESS:
3217 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3218 "(%s)", cf->filename, err_info);
3222 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3223 cf->filename, wtap_strerror(err));
3226 if (save_file != NULL) {
3227 /* Now close the capture file. */
3228 if (!wtap_dump_close(pdh, &err))
3229 show_capture_file_io_error(save_file, err, TRUE);
3232 if (save_file != NULL) {
3233 /* Now close the capture file. */
3234 if (!wtap_dump_close(pdh, &err))
3235 show_capture_file_io_error(save_file, err, TRUE);
3237 if (print_packet_info) {
3238 if (!write_finale()) {
3240 show_print_file_io_error(err);
3247 wtap_close(cf->wth);
3250 g_free(save_file_string);
3257 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3259 gboolean filtering_tap_listeners, guint tap_flags)
3262 gboolean create_proto_tree;
3267 /* Count this packet. */
3270 /* If we're not running a display filter and we're not printing any
3271 packet information, we don't need to do a dissection. This means
3272 that all packets can be marked as 'passed'. */
3275 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3277 /* If we're going to print packet information, or we're going to
3278 run a read filter, or we're going to process taps, set up to
3279 do a dissection and do so. */
3280 if (do_dissection) {
3281 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3282 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3283 /* Grab any resolved addresses */
3284 host_name_lookup_process();
3286 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3287 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3288 create_proto_tree = TRUE;
3290 create_proto_tree = FALSE;
3292 /* The protocol tree will be "visible", i.e., printed, only if we're
3293 printing packet details, which is true if we're printing stuff
3294 ("print_packet_info" is true) and we're in verbose mode
3295 ("packet_details" is true). */
3296 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3298 /* If we're running a filter, prime the epan_dissect_t with that
3301 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3303 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3305 col_custom_prime_edt(&edt, &cf->cinfo);
3307 /* We only need the columns if either
3308 1) some tap needs the columns
3310 2) we're printing packet info but we're *not* verbose; in verbose
3311 mode, we print the protocol tree, not the protocol summary.
3313 3) there is a column mapped as an individual field */
3314 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3319 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3321 if (ref == &fdata) {
3326 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3328 /* Run the filters if we have them. */
3330 passed = dfilter_apply_edt(cf->rfcode, &edt);
3331 if (passed && cf->dfcode)
3332 passed = dfilter_apply_edt(cf->dfcode, &edt);
3336 frame_data_set_after_dissect(&fdata, &cum_bytes);
3338 /* Process this packet. */
3339 if (print_packet_info) {
3340 /* We're printing packet information; print the information for
3343 print_packet(cf, &edt);
3345 print_packet(cf, NULL);
3347 /* The ANSI C standard does not appear to *require* that a line-buffered
3348 stream be flushed to the host environment whenever a newline is
3349 written, it just says that, on such a stream, characters "are
3350 intended to be transmitted to or from the host environment as a
3351 block when a new-line character is encountered".
3353 The Visual C++ 6.0 C implementation doesn't do what is intended;
3354 even if you set a stream to be line-buffered, it still doesn't
3355 flush the buffer at the end of every line.
3357 So, if the "-l" flag was specified, we flush the standard output
3358 at the end of a packet. This will do the right thing if we're
3359 printing packet summary lines, and, as we print the entire protocol
3360 tree for a single packet without waiting for anything to happen,
3361 it should be as good as line-buffered mode if we're printing
3362 protocol trees. (The whole reason for the "-l" flag in either
3363 tcpdump or TShark is to allow the output of a live capture to
3364 be piped to a program or script and to have that script see the
3365 information for the packet as soon as it's printed, rather than
3366 having to wait until a standard I/O buffer fills up. */
3370 if (ferror(stdout)) {
3371 show_print_file_io_error(errno);
3376 /* this must be set after print_packet() [bug #8160] */
3377 prev_dis_frame = fdata;
3378 prev_dis = &prev_dis_frame;
3381 prev_cap_frame = fdata;
3382 prev_cap = &prev_cap_frame;
3384 if (do_dissection) {
3385 epan_dissect_cleanup(&edt);
3386 frame_data_destroy(&fdata);
3392 write_preamble(capture_file *cf)
3394 switch (output_action) {
3397 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3401 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3403 write_psml_preamble(stdout);
3404 return !ferror(stdout);
3407 write_fields_preamble(output_fields, stdout);
3408 return !ferror(stdout);
3411 g_assert_not_reached();
3417 get_line_buf(size_t len)
3419 static char *line_bufp = NULL;
3420 static size_t line_buf_len = 256;
3421 size_t new_line_buf_len;
3423 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3424 new_line_buf_len *= 2)
3426 if (line_bufp == NULL) {
3427 line_buf_len = new_line_buf_len;
3428 line_bufp = (char *)g_malloc(line_buf_len + 1);
3430 if (new_line_buf_len > line_buf_len) {
3431 line_buf_len = new_line_buf_len;
3432 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3439 print_columns(capture_file *cf)
3446 line_bufp = get_line_buf(256);
3449 for (i = 0; i < cf->cinfo.num_cols; i++) {
3450 /* Skip columns not marked as visible. */
3451 if (!get_column_visible(i))
3453 switch (cf->cinfo.col_fmt[i]) {
3457 * Don't print this if we're doing a live capture from a network
3458 * interface - if we're doing a live capture, you won't be
3459 * able to look at the capture in the future (it's not being
3460 * saved anywhere), so the frame numbers are unlikely to be
3463 * (XXX - it might be nice to be able to save and print at
3464 * the same time, sort of like an "Update list of packets
3465 * in real time" capture in Wireshark.)
3467 if (global_capture_opts.ifaces->len > 0)
3470 column_len = strlen(cf->cinfo.col_data[i]);
3473 line_bufp = get_line_buf(buf_offset + column_len);
3474 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3480 case COL_ABS_DATE_TIME:
3482 case COL_UTC_DATE_TIME: /* XXX - wider */
3483 column_len = strlen(cf->cinfo.col_data[i]);
3484 if (column_len < 10)
3486 line_bufp = get_line_buf(buf_offset + column_len);
3487 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3493 case COL_DEF_DL_SRC:
3494 case COL_RES_DL_SRC:
3495 case COL_UNRES_DL_SRC:
3496 case COL_DEF_NET_SRC:
3497 case COL_RES_NET_SRC:
3498 case COL_UNRES_NET_SRC:
3499 column_len = strlen(cf->cinfo.col_data[i]);
3500 if (column_len < 12)
3502 line_bufp = get_line_buf(buf_offset + column_len);
3503 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3509 case COL_DEF_DL_DST:
3510 case COL_RES_DL_DST:
3511 case COL_UNRES_DL_DST:
3512 case COL_DEF_NET_DST:
3513 case COL_RES_NET_DST:
3514 case COL_UNRES_NET_DST:
3515 column_len = strlen(cf->cinfo.col_data[i]);
3516 if (column_len < 12)
3518 line_bufp = get_line_buf(buf_offset + column_len);
3519 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3523 column_len = strlen(cf->cinfo.col_data[i]);
3524 line_bufp = get_line_buf(buf_offset + column_len);
3525 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3528 buf_offset += column_len;
3529 if (i != cf->cinfo.num_cols - 1) {
3531 * This isn't the last column, so we need to print a
3532 * separator between this column and the next.
3534 * If we printed a network source and are printing a
3535 * network destination of the same type next, separate
3536 * them with " -> "; if we printed a network destination
3537 * and are printing a network source of the same type
3538 * next, separate them with " <- "; otherwise separate them
3541 * We add enough space to the buffer for " <- " or " -> ",
3542 * even if we're only adding " ".
3544 line_bufp = get_line_buf(buf_offset + 4);
3545 switch (cf->cinfo.col_fmt[i]) {
3550 switch (cf->cinfo.col_fmt[i + 1]) {
3555 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3560 g_strlcat(line_bufp + buf_offset, " ", 5);
3566 case COL_DEF_DL_SRC:
3567 case COL_RES_DL_SRC:
3568 case COL_UNRES_DL_SRC:
3569 switch (cf->cinfo.col_fmt[i + 1]) {
3571 case COL_DEF_DL_DST:
3572 case COL_RES_DL_DST:
3573 case COL_UNRES_DL_DST:
3574 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3579 g_strlcat(line_bufp + buf_offset, " ", 5);
3585 case COL_DEF_NET_SRC:
3586 case COL_RES_NET_SRC:
3587 case COL_UNRES_NET_SRC:
3588 switch (cf->cinfo.col_fmt[i + 1]) {
3590 case COL_DEF_NET_DST:
3591 case COL_RES_NET_DST:
3592 case COL_UNRES_NET_DST:
3593 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3598 g_strlcat(line_bufp + buf_offset, " ", 5);
3607 switch (cf->cinfo.col_fmt[i + 1]) {
3612 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3617 g_strlcat(line_bufp + buf_offset, " ", 5);
3623 case COL_DEF_DL_DST:
3624 case COL_RES_DL_DST:
3625 case COL_UNRES_DL_DST:
3626 switch (cf->cinfo.col_fmt[i + 1]) {
3628 case COL_DEF_DL_SRC:
3629 case COL_RES_DL_SRC:
3630 case COL_UNRES_DL_SRC:
3631 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3636 g_strlcat(line_bufp + buf_offset, " ", 5);
3642 case COL_DEF_NET_DST:
3643 case COL_RES_NET_DST:
3644 case COL_UNRES_NET_DST:
3645 switch (cf->cinfo.col_fmt[i + 1]) {
3647 case COL_DEF_NET_SRC:
3648 case COL_RES_NET_SRC:
3649 case COL_UNRES_NET_SRC:
3650 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3655 g_strlcat(line_bufp + buf_offset, " ", 5);
3662 g_strlcat(line_bufp + buf_offset, " ", 5);
3668 return print_line(print_stream, 0, line_bufp);
3672 print_packet(capture_file *cf, epan_dissect_t *edt)
3674 print_args_t print_args;
3676 if (print_summary || output_fields_has_cols(output_fields)) {
3677 /* Just fill in the columns. */
3678 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3680 if (print_summary) {
3681 /* Now print them. */
3682 switch (output_action) {
3685 if (!print_columns(cf))
3690 proto_tree_write_psml(edt, stdout);
3691 return !ferror(stdout);
3692 case WRITE_FIELDS: /*No non-verbose "fields" format */
3693 g_assert_not_reached();
3698 if (print_details) {
3699 /* Print the information in the protocol tree. */
3700 switch (output_action) {
3703 /* Only initialize the fields that are actually used in proto_tree_print.
3704 * This is particularly important for .range, as that's heap memory which
3705 * we would otherwise have to g_free().
3706 print_args.to_file = TRUE;
3707 print_args.format = print_format;
3708 print_args.print_summary = print_summary;
3709 print_args.print_formfeed = FALSE;
3710 packet_range_init(&print_args.range, &cfile);
3712 print_args.print_hex = print_hex;
3713 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3715 if (!proto_tree_print(&print_args, edt, print_stream))
3718 if (!print_line(print_stream, 0, separator))
3724 proto_tree_write_pdml(edt, stdout);
3726 return !ferror(stdout);
3728 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3730 return !ferror(stdout);
3734 if (print_summary || print_details) {
3735 if (!print_line(print_stream, 0, ""))
3738 if (!print_hex_data(print_stream, edt))
3740 if (!print_line(print_stream, 0, separator))
3749 switch (output_action) {
3752 return print_finale(print_stream);
3756 write_pdml_finale(stdout);
3758 write_psml_finale(stdout);
3759 return !ferror(stdout);
3762 write_fields_finale(output_fields, stdout);
3763 return !ferror(stdout);
3766 g_assert_not_reached();
3772 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3776 char err_msg[2048+1];
3778 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3782 /* The open succeeded. Fill in the information for this file. */
3784 /* Create new epan session for dissection. */
3785 epan_free(cf->epan);
3786 cf->epan = tshark_epan_new(cf);
3789 cf->f_datalen = 0; /* not used, but set it anyway */
3791 /* Set the file name because we need it to set the follow stream filter.
3792 XXX - is that still true? We need it for other reasons, though,
3794 cf->filename = g_strdup(fname);
3796 /* Indicate whether it's a permanent or temporary file. */
3797 cf->is_tempfile = is_tempfile;
3799 /* No user changes yet. */
3800 cf->unsaved_changes = FALSE;
3802 cf->cd_t = wtap_file_type(cf->wth);
3804 cf->drops_known = FALSE;
3806 cf->snap = wtap_snapshot_length(cf->wth);
3807 if (cf->snap == 0) {
3808 /* Snapshot length not known. */
3809 cf->has_snap = FALSE;
3810 cf->snap = WTAP_MAX_PACKET_SIZE;
3812 cf->has_snap = TRUE;
3813 nstime_set_zero(&cf->elapsed_time);
3818 cf->state = FILE_READ_IN_PROGRESS;
3820 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3821 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3826 g_snprintf(err_msg, sizeof err_msg,
3827 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3828 cmdarg_err("%s", err_msg);
3833 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3835 char *save_file_string;
3837 save_file_string = output_file_description(fname);
3842 cmdarg_err("Not all the packets could be written to the %s because there is "
3843 "no space left on the file system.",
3849 cmdarg_err("Not all the packets could be written to the %s because you are "
3850 "too close to, or over your disk quota.",
3855 case WTAP_ERR_CANT_CLOSE:
3856 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3860 case WTAP_ERR_SHORT_WRITE:
3861 cmdarg_err("Not all the packets could be written to the %s.",
3867 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3868 wtap_strerror(err));
3870 cmdarg_err("An error occurred while writing to the %s: %s.",
3871 save_file_string, wtap_strerror(err));
3875 g_free(save_file_string);
3879 show_print_file_io_error(int err)
3884 cmdarg_err("Not all the packets could be printed because there is "
3885 "no space left on the file system.");
3890 cmdarg_err("Not all the packets could be printed because you are "
3891 "too close to, or over your disk quota.");
3896 cmdarg_err("An error occurred while printing packets: %s.",
3903 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3907 static char errmsg_errno[1024+1];
3910 /* Wiretap error. */
3913 case WTAP_ERR_NOT_REGULAR_FILE:
3914 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3917 case WTAP_ERR_RANDOM_OPEN_PIPE:
3918 /* Seen only when opening a capture file for reading. */
3919 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3922 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3923 /* Seen only when opening a capture file for reading. */
3924 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3927 case WTAP_ERR_UNSUPPORTED:
3928 /* Seen only when opening a capture file for reading. */
3929 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3930 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3933 errmsg = errmsg_errno;
3936 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3937 /* Seen only when opening a capture file for writing. */
3938 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3939 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3940 "written to a pipe.", wtap_file_type_short_string(file_type));
3941 errmsg = errmsg_errno;
3944 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3945 /* Seen only when opening a capture file for writing. */
3946 errmsg = "TShark doesn't support writing capture files in that format.";
3949 case WTAP_ERR_UNSUPPORTED_ENCAP:
3951 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3952 "TShark can't save this capture as a \"%s\" file.",
3953 wtap_file_type_short_string(file_type));
3955 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3956 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3960 errmsg = errmsg_errno;
3963 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3965 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3966 "TShark can't save this capture as a \"%s\" file.",
3967 wtap_file_type_short_string(file_type));
3968 errmsg = errmsg_errno;
3970 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3973 case WTAP_ERR_BAD_FILE:
3974 /* Seen only when opening a capture file for reading. */
3975 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3976 "The file \"%%s\" appears to be damaged or corrupt.\n"
3979 errmsg = errmsg_errno;
3982 case WTAP_ERR_CANT_OPEN:
3984 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3986 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3989 case WTAP_ERR_SHORT_READ:
3990 errmsg = "The file \"%s\" appears to have been cut short"
3991 " in the middle of a packet or other data.";
3994 case WTAP_ERR_SHORT_WRITE:
3995 errmsg = "A full header couldn't be written to the file \"%s\".";
3998 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3999 errmsg = "This file type cannot be written as a compressed file.";
4002 case WTAP_ERR_DECOMPRESS:
4003 /* Seen only when opening a capture file for reading. */
4004 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4005 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
4008 errmsg = errmsg_errno;
4012 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4013 "The file \"%%s\" could not be %s: %s.",
4014 for_writing ? "created" : "opened",
4015 wtap_strerror(err));
4016 errmsg = errmsg_errno;
4020 errmsg = file_open_error_message(err, for_writing);
4025 * Open/create errors are reported with an console message in TShark.
4028 open_failure_message(const char *filename, int err, gboolean for_writing)
4030 fprintf(stderr, "tshark: ");
4031 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4032 fprintf(stderr, "\n");
4037 * General errors are reported with an console message in TShark.
4040 failure_message(const char *msg_format, va_list ap)
4042 fprintf(stderr, "tshark: ");
4043 vfprintf(stderr, msg_format, ap);
4044 fprintf(stderr, "\n");
4048 * Read errors are reported with an console message in TShark.
4051 read_failure_message(const char *filename, int err)
4053 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4054 filename, g_strerror(err));
4058 * Write errors are reported with an console message in TShark.
4061 write_failure_message(const char *filename, int err)
4063 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4064 filename, g_strerror(err));
4068 * Report an error in command-line arguments.
4071 cmdarg_err(const char *fmt, ...)
4076 failure_message(fmt, ap);
4081 * Report additional information for an error in command-line arguments.
4084 cmdarg_err_cont(const char *fmt, ...)
4089 vfprintf(stderr, fmt, ap);
4090 fprintf(stderr, "\n");
4096 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4101 * indent-tabs-mode: nil
4104 * vi: set shiftwidth=2 tabstop=8 expandtab:
4105 * :indentSize=2:tabSize=8:noTabs=true: