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_session.h"
99 #include "capture_sync.h"
100 #include "capture_opts.h"
101 #endif /* HAVE_LIBPCAP */
103 #include <epan/funnel.h>
106 * This is the template for the decode as option; it is shared between the
107 * various functions that output the usage for this parameter.
109 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
111 static guint32 cum_bytes;
112 static const frame_data *ref;
113 static frame_data ref_frame;
114 static frame_data *prev_dis;
115 static frame_data prev_dis_frame;
116 static frame_data *prev_cap;
117 static frame_data prev_cap_frame;
119 static const char* prev_display_dissector_name = NULL;
121 static gboolean perform_two_pass_analysis;
124 * The way the packet decode is to be written.
127 WRITE_TEXT, /* summary or detail text */
128 WRITE_XML, /* PDML or PSML */
129 WRITE_FIELDS /* User defined list of fields */
130 /* Add CSV and the like here */
133 static output_action_e output_action;
134 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
135 static gboolean print_packet_info; /* TRUE if we're to print packet information */
136 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
137 static gboolean print_details; /* TRUE if we're to print packet details information */
138 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
139 static gboolean line_buffered;
140 static gboolean really_quiet = FALSE;
142 static print_format_e print_format = PR_FMT_TEXT;
143 static print_stream_t *print_stream;
145 static output_fields_t* output_fields = NULL;
147 /* The line separator used between packets, changeable via the -S option */
148 static const char *separator = "";
152 * TRUE if we're to print packet counts to keep track of captured packets.
154 static gboolean print_packet_counts = TRUE;
156 static capture_options global_capture_opts;
157 static capture_session global_capture_session;
160 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
161 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
164 static gboolean capture(void);
165 static void report_counts(void);
167 static BOOL WINAPI capture_cleanup(DWORD);
169 static void capture_cleanup(int);
171 static void report_counts_siginfo(int);
174 #endif /* HAVE_LIBPCAP */
176 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
177 static gboolean process_packet(capture_file *cf, gint64 offset,
178 struct wtap_pkthdr *whdr, const guchar *pd,
179 gboolean filtering_tap_listeners, guint tap_flags);
180 static void show_capture_file_io_error(const char *, int, gboolean);
181 static void show_print_file_io_error(int err);
182 static gboolean write_preamble(capture_file *cf);
183 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
184 static gboolean write_finale(void);
185 static const char *cf_open_error_message(int err, gchar *err_info,
186 gboolean for_writing, int file_type);
188 static void open_failure_message(const char *filename, int err,
189 gboolean for_writing);
190 static void failure_message(const char *msg_format, va_list ap);
191 static void read_failure_message(const char *filename, int err);
192 static void write_failure_message(const char *filename, int err);
197 const char *sstr; /* The short string */
198 const char *lstr; /* The long string */
202 string_compare(gconstpointer a, gconstpointer b)
204 return strcmp(((const struct string_elem *)a)->sstr,
205 ((const struct string_elem *)b)->sstr);
209 string_elem_print(gpointer data, gpointer not_used _U_)
211 fprintf(stderr, " %s - %s\n",
212 ((struct string_elem *)data)->sstr,
213 ((struct string_elem *)data)->lstr);
217 list_capture_types(void) {
219 struct string_elem *captypes;
222 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
224 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
225 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
226 if (wtap_dump_can_open(i)) {
227 captypes[i].sstr = wtap_file_type_short_string(i);
228 captypes[i].lstr = wtap_file_type_string(i);
229 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
232 g_slist_foreach(list, string_elem_print, NULL);
238 print_usage(gboolean print_ver)
245 "TShark " VERSION "%s\n"
246 "Dump and analyze network traffic.\n"
247 "See http://www.wireshark.org for more information.\n"
250 wireshark_svnversion, get_copyright_info());
254 fprintf(output, "\n");
255 fprintf(output, "Usage: tshark [options] ...\n");
256 fprintf(output, "\n");
259 fprintf(output, "Capture interface:\n");
260 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
261 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
262 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
263 fprintf(output, " -p don't capture in promiscuous mode\n");
264 #ifdef HAVE_PCAP_CREATE
265 fprintf(output, " -I capture in monitor mode, if available\n");
267 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
268 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
270 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
271 fprintf(output, " -D print list of interfaces and exit\n");
272 fprintf(output, " -L print list of link-layer types of iface and exit\n");
273 fprintf(output, "\n");
274 fprintf(output, "Capture stop conditions:\n");
275 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
276 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
277 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
278 fprintf(output, " files:NUM - stop after NUM files\n");
279 /*fprintf(output, "\n");*/
280 fprintf(output, "Capture output:\n");
281 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
282 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
283 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
284 #endif /* HAVE_LIBPCAP */
285 #ifdef HAVE_PCAP_REMOTE
286 fprintf(output, "RPCAP options:\n");
287 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
289 /*fprintf(output, "\n");*/
290 fprintf(output, "Input file:\n");
291 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
293 fprintf(output, "\n");
294 fprintf(output, "Processing:\n");
295 fprintf(output, " -2 perform a two-pass analysis\n");
296 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
297 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
298 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
299 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
300 fprintf(output, " -d %s ...\n", decode_as_arg_template);
301 fprintf(output, " \"Decode As\", see the man page for details\n");
302 fprintf(output, " Example: tcp.port==8888,http\n");
303 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
304 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
306 /*fprintf(output, "\n");*/
307 fprintf(output, "Output:\n");
308 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
309 fprintf(output, " (or to the standard output for \"-\")\n");
310 fprintf(output, " -C <config profile> start with specified configuration profile\n");
311 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
312 fprintf(output, " an empty \"-F\" option will list the file types\n");
313 fprintf(output, " -V add output of packet tree (Packet Details)\n");
314 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
315 fprintf(output, " separated\n");
316 fprintf(output, " -P print packet summary even when writing to a file\n");
317 fprintf(output, " -S <separator> the line separator to print between packets\n");
318 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
319 fprintf(output, " -T pdml|ps|psml|text|fields\n");
320 fprintf(output, " format of text output (def: text)\n");
321 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
322 fprintf(output, " this option can be repeated to print multiple fields\n");
323 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
324 fprintf(output, " header=y|n switch headers on and off\n");
325 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
326 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
327 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
328 fprintf(output, " aggregator\n");
329 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
330 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
331 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
332 fprintf(output, " -l flush standard output after each packet\n");
333 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
334 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
335 fprintf(output, " -g enable group read access on the output file(s)\n");
336 fprintf(output, " -W n Save extra information in the file, if supported.\n");
337 fprintf(output, " n = write network address resolution information\n");
338 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
339 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
341 fprintf(output, "\n");
342 fprintf(output, "Miscellaneous:\n");
343 fprintf(output, " -h display this help and exit\n");
344 fprintf(output, " -v display version info and exit\n");
345 fprintf(output, " -o <name>:<value> ... override preference setting\n");
346 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
347 fprintf(output, " -G [report] dump one of several available reports and exit\n");
348 fprintf(output, " default report=\"fields\"\n");
349 fprintf(output, " use \"-G ?\" for more help\n");
353 glossary_option_help(void)
359 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
361 fprintf(output, "\n");
362 fprintf(output, "Usage: tshark -G [report]\n");
363 fprintf(output, "\n");
364 fprintf(output, "Glossary table reports:\n");
365 fprintf(output, " -G fields dump fields glossary and exit\n");
366 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
367 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
368 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
369 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
370 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
371 fprintf(output, "\n");
372 fprintf(output, "Preference reports:\n");
373 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
374 fprintf(output, " -G currentprefs dump current preferences and exit\n");
375 fprintf(output, "\n");
379 * For a dissector table, print on the stream described by output,
380 * its short name (which is what's used in the "-d" option) and its
384 display_dissector_table_names(const char *table_name, const char *ui_name,
387 if ((prev_display_dissector_name == NULL) ||
388 (strcmp(prev_display_dissector_name, table_name) != 0)) {
389 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
390 prev_display_dissector_name = table_name;
395 * For a dissector handle, print on the stream described by output,
396 * the filter name (which is what's used in the "-d" option) and the full
397 * name for the protocol that corresponds to this handle.
400 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
403 const gchar *proto_filter_name;
404 const gchar *proto_ui_name;
406 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
408 if (proto_id != -1) {
409 proto_filter_name = proto_get_protocol_filter_name(proto_id);
410 proto_ui_name = proto_get_protocol_name(proto_id);
411 g_assert(proto_filter_name != NULL);
412 g_assert(proto_ui_name != NULL);
414 if ((prev_display_dissector_name == NULL) ||
415 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
416 fprintf((FILE *)output, "\t%s (%s)\n",
419 prev_display_dissector_name = proto_filter_name;
425 * The protocol_name_search structure is used by find_protocol_name_func()
426 * to pass parameters and store results
428 struct protocol_name_search{
429 gchar *searched_name; /* Protocol filter name we are looking for */
430 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
431 guint nb_match; /* How many dissectors matched searched_name */
433 typedef struct protocol_name_search *protocol_name_search_t;
436 * This function parses all dissectors associated with a table to find the
437 * one whose protocol has the specified filter name. It is called
438 * as a reference function in a call to dissector_table_foreach_handle.
439 * The name we are looking for, as well as the results, are stored in the
440 * protocol_name_search struct pointed to by user_data.
441 * If called using dissector_table_foreach_handle, we actually parse the
442 * whole list of dissectors.
445 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
449 const gchar *protocol_filter_name;
450 protocol_name_search_t search_info;
454 search_info = (protocol_name_search_t)user_data;
456 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
457 if (proto_id != -1) {
458 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
459 g_assert(protocol_filter_name != NULL);
460 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
462 if (search_info->nb_match == 0) {
463 /* Record this handle only if this is the first match */
464 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
466 search_info->nb_match++;
472 * Allow dissector key names to be sorted alphabetically
476 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
478 return strcmp((const char*)dissector_a, (const char*)dissector_b);
482 * Print all layer type names supported.
483 * We send the output to the stream described by the handle output.
487 fprint_all_layer_types(FILE *output)
490 prev_display_dissector_name = NULL;
491 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
495 * Print all protocol names supported for a specific layer type.
496 * table_name contains the layer type name in which the search is performed.
497 * We send the output to the stream described by the handle output.
501 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
504 prev_display_dissector_name = NULL;
505 dissector_table_foreach_handle(table_name,
506 display_dissector_names,
511 * The function below parses the command-line parameters for the decode as
512 * feature (a string pointer by cl_param).
513 * It checks the format of the command-line, searches for a matching table
514 * and dissector. If a table/dissector match is not found, we display a
515 * summary of the available tables/dissectors (on stderr) and return FALSE.
516 * If everything is fine, we get the "Decode as" preference activated,
517 * then we return TRUE.
520 add_decode_as(const gchar *cl_param)
523 guint32 selector, selector2;
524 gchar *decoded_param;
525 gchar *remaining_param;
527 gchar *dissector_str;
528 dissector_handle_t dissector_matching;
529 dissector_table_t table_matching;
530 ftenum_t dissector_table_selector_type;
531 struct protocol_name_search user_protocol_name;
535 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
538 decoded_param = g_strdup(cl_param);
539 g_assert(decoded_param);
542 /* The lines below will parse this string (modifying it) to extract all
543 necessary information. Note that decoded_param is still needed since
544 strings are not copied - we just save pointers. */
546 /* This section extracts a layer type (table_name) from decoded_param */
547 table_name = decoded_param; /* Layer type string starts from beginning */
549 remaining_param = strchr(table_name, '=');
550 if (remaining_param == NULL) {
551 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
552 /* If the argument does not follow the template, carry on anyway to check
553 if the table name is at least correct. If remaining_param is NULL,
554 we'll exit anyway further down */
557 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
560 /* Remove leading and trailing spaces from the table name */
561 while ( table_name[0] == ' ' )
563 while ( table_name[strlen(table_name) - 1] == ' ' )
564 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
566 /* The following part searches a table matching with the layer type specified */
567 table_matching = NULL;
569 /* Look for the requested table */
570 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
571 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
574 table_matching = find_dissector_table(table_name);
575 if (!table_matching) {
576 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
580 if (!table_matching) {
581 /* Display a list of supported layer types to help the user, if the
582 specified layer type was not found */
583 cmdarg_err("Valid layer types are:");
584 fprint_all_layer_types(stderr);
586 if (remaining_param == NULL || !table_matching) {
587 /* Exit if the layer type was not found, or if no '=' separator was found
589 g_free(decoded_param);
593 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
594 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
597 remaining_param++; /* Move to the second '=' */
598 *remaining_param = '\0'; /* Remove the second '=' */
600 remaining_param++; /* Position after the layer type string */
602 /* This section extracts a selector value (selector_str) from decoded_param */
604 selector_str = remaining_param; /* Next part starts with the selector number */
606 remaining_param = strchr(selector_str, ',');
607 if (remaining_param == NULL) {
608 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
609 /* If the argument does not follow the template, carry on anyway to check
610 if the selector value is at least correct. If remaining_param is NULL,
611 we'll exit anyway further down */
614 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
617 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
619 switch (dissector_table_selector_type) {
625 /* The selector for this table is an unsigned number. Parse it as such.
626 There's no need to remove leading and trailing spaces from the
627 selector number string, because sscanf will do that for us. */
628 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
633 if (op != ':' && op != '-') {
634 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
635 g_free(decoded_param);
639 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
640 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
641 g_free(decoded_param);
645 else if (selector2 < selector) {
646 /* We could swap them for the user, but maybe it's better to call
647 * this out as an error in case it's not what was intended? */
648 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
649 g_free(decoded_param);
654 cmdarg_err("Invalid selector number \"%s\"", selector_str);
655 g_free(decoded_param);
662 /* The selector for this table is a string. */
666 /* There are currently no dissector tables with any types other
667 than the ones listed above. */
668 g_assert_not_reached();
671 if (remaining_param == NULL) {
672 /* Exit if no ',' separator was found (see above) */
673 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
674 fprint_all_protocols_for_layer_types(stderr, table_name);
675 g_free(decoded_param);
679 remaining_param++; /* Position after the selector number string */
681 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
683 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
685 /* Remove leading and trailing spaces from the dissector name */
686 while ( dissector_str[0] == ' ' )
688 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
689 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
691 dissector_matching = NULL;
693 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
694 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 */
695 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
698 user_protocol_name.nb_match = 0;
699 user_protocol_name.searched_name = dissector_str;
700 user_protocol_name.matched_handle = NULL;
702 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 */
704 if (user_protocol_name.nb_match != 0) {
705 dissector_matching = user_protocol_name.matched_handle;
706 if (user_protocol_name.nb_match > 1) {
707 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
711 /* OK, check whether the problem is that there isn't any such
712 protocol, or that there is but it's not specified as a protocol
713 that's valid for that dissector table.
714 Note, we don't exit here, but dissector_matching will remain NULL,
716 if (proto_get_id_by_filter_name(dissector_str) == -1) {
717 /* No such protocol */
718 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
720 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
721 dissector_str, table_name);
726 if (!dissector_matching) {
727 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
728 fprint_all_protocols_for_layer_types(stderr, table_name);
729 g_free(decoded_param);
733 /* This is the end of the code that parses the command-line options.
734 All information is now stored in the variables:
738 The above variables that are strings are still pointing to areas within
739 decoded_parm. decoded_parm thus still needs to be kept allocated in
740 until we stop needing these variables
741 decoded_param will be deallocated at each exit point of this function */
744 /* We now have a pointer to the handle for the requested dissector
745 (requested protocol) inside the variable dissector_matching */
746 switch (dissector_table_selector_type) {
752 /* The selector for this table is an unsigned number. */
754 dissector_change_uint(table_name, selector, dissector_matching);
755 } else if (op == ':') {
756 for (i = selector; i < (guint64)selector + selector2; i++) {
757 dissector_change_uint(table_name, (guint32)i, dissector_matching);
759 } else { /* op == '-' */
760 for (i = selector; i <= selector2; i++) {
761 dissector_change_uint(table_name, (guint32)i, dissector_matching);
768 /* The selector for this table is a string. */
769 dissector_change_string(table_name, selector_str, dissector_matching);
773 /* There are currently no dissector tables with any types other
774 than the ones listed above. */
775 g_assert_not_reached();
777 g_free(decoded_param); /* "Decode As" rule has been successfully added */
782 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
783 const gchar *message, gpointer user_data)
785 /* ignore log message, if log_level isn't interesting based
786 upon the console log preferences.
787 If the preferences haven't been loaded loaded yet, display the
790 The default console_log_level preference value is such that only
791 ERROR, CRITICAL and WARNING level messages are processed;
792 MESSAGE, INFO and DEBUG level messages are ignored.
794 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
795 ERROR and CRITICAL level messages so the current code is a behavioral
796 change. The current behavior is the same as in Wireshark.
798 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
799 prefs.console_log_level != 0) {
803 g_log_default_handler(log_domain, log_level, message, user_data);
808 output_file_description(const char *fname)
810 char *save_file_string;
812 /* Get a string that describes what we're writing to */
813 if (strcmp(fname, "-") == 0) {
814 /* We're writing to the standard output */
815 save_file_string = g_strdup("standard output");
817 /* We're writing to a file with the name in save_file */
818 save_file_string = g_strdup_printf("file \"%s\"", fname);
820 return save_file_string;
824 print_current_user(void) {
825 gchar *cur_user, *cur_group;
827 if (started_with_special_privs()) {
828 cur_user = get_cur_username();
829 cur_group = get_cur_groupname();
830 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
831 cur_user, cur_group);
834 if (running_with_special_privs()) {
835 fprintf(stderr, " This could be dangerous.");
837 fprintf(stderr, "\n");
842 check_capture_privs(void) {
845 /* Warn the user if npf.sys isn't loaded. */
846 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
847 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
848 "capturing or\nlisting interfaces.\n");
854 show_version(GString *comp_info_str, GString *runtime_info_str)
856 printf("TShark " VERSION "%s\n"
863 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
864 runtime_info_str->str);
868 main(int argc, char *argv[])
870 GString *comp_info_str;
871 GString *runtime_info_str;
872 char *init_progfile_dir_error;
874 struct option long_options[] = {
875 {"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
878 gboolean arg_error = FALSE;
884 char *gpf_path, *pf_path;
885 char *gdp_path, *dp_path;
886 int gpf_open_errno, gpf_read_errno;
887 int pf_open_errno, pf_read_errno;
888 int gdp_open_errno, gdp_read_errno;
889 int dp_open_errno, dp_read_errno;
891 volatile int exit_status = 0;
893 gboolean list_link_layer_types = FALSE;
894 gboolean start_capture = FALSE;
899 gboolean capture_option_specified = FALSE;
901 gboolean quiet = FALSE;
902 #ifdef PCAP_NG_DEFAULT
903 volatile int out_file_type = WTAP_FILE_PCAPNG;
905 volatile int out_file_type = WTAP_FILE_PCAP;
907 volatile gboolean out_file_name_res = FALSE;
908 gchar *volatile cf_name = NULL;
909 gchar *rfilter = NULL;
910 gchar *dfilter = NULL;
911 #ifdef HAVE_PCAP_OPEN_DEAD
912 struct bpf_program fcode;
914 dfilter_t *rfcode = NULL;
915 dfilter_t *dfcode = NULL;
920 gchar *output_only = NULL;
922 #ifdef HAVE_PCAP_REMOTE
923 #define OPTSTRING_A "A:"
925 #define OPTSTRING_A ""
928 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
929 #define OPTSTRING_B "B:"
931 #define OPTSTRING_B ""
932 #endif /* _WIN32 or HAVE_PCAP_CREATE */
933 #else /* HAVE_LIBPCAP */
934 #define OPTSTRING_B ""
935 #endif /* HAVE_LIBPCAP */
937 #ifdef HAVE_PCAP_CREATE
938 #define OPTSTRING_I "I"
940 #define OPTSTRING_I ""
943 /* the leading - ensures that getopt() does not permute the argv[] entries
944 we have to make sure that the first getopt() preserves the content of argv[]
945 for the subsequent getopt_long() call */
946 #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:"
948 static const char optstring[] = OPTSTRING;
950 /* Assemble the compile-time version information string */
951 comp_info_str = g_string_new("Compiled ");
952 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
954 /* Assemble the run-time version information string */
955 runtime_info_str = g_string_new("Running ");
956 get_runtime_version_info(runtime_info_str, NULL);
958 /* Add it to the information to be reported on a crash. */
959 ws_add_crash_info("TShark " VERSION "%s\n"
964 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
967 arg_list_utf_16to8(argc, argv);
968 create_app_running_mutex();
969 #if !GLIB_CHECK_VERSION(2,31,0)
975 * Get credential information for later use.
977 init_process_policies();
980 * Attempt to get the pathname of the executable file.
982 init_progfile_dir_error = init_progfile_dir(argv[0], main);
983 if (init_progfile_dir_error != NULL) {
984 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
985 init_progfile_dir_error);
989 * In order to have the -X opts assigned before the wslua machine starts
990 * we need to call getopts before epan_init() gets called.
993 optind_initial = optind;
995 while ((opt = getopt(argc, argv, optstring)) != -1) {
997 case 'C': /* Configuration Profile */
998 if (profile_exists (optarg, FALSE)) {
999 set_profile_name (optarg);
1001 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1005 case 'P': /* Print packet summary info even when writing to a file */
1006 print_packet_info = TRUE;
1007 print_summary = TRUE;
1009 case 'O': /* Only output these protocols */
1010 output_only = g_strdup(optarg);
1012 case 'V': /* Verbose */
1013 print_details = TRUE;
1014 print_packet_info = TRUE;
1016 case 'x': /* Print packet data in hex (and ASCII) */
1018 /* The user asked for hex output, so let's ensure they get it,
1019 * even if they're writing to a file.
1021 print_packet_info = TRUE;
1032 * Print packet summary information is the default, unless either -V or -x
1033 * were specified and -P was not. Note that this is new behavior, which
1034 * allows for the possibility of printing only hex/ascii output without
1035 * necessarily requiring that either the summary or details be printed too.
1037 if (print_summary == -1)
1038 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1040 optind = optind_initial;
1045 /** Send All g_log messages to our own handler **/
1049 G_LOG_LEVEL_CRITICAL|
1050 G_LOG_LEVEL_WARNING|
1051 G_LOG_LEVEL_MESSAGE|
1054 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1056 g_log_set_handler(NULL,
1057 (GLogLevelFlags)log_flags,
1058 tshark_log_handler, NULL /* user_data */);
1059 g_log_set_handler(LOG_DOMAIN_MAIN,
1060 (GLogLevelFlags)log_flags,
1061 tshark_log_handler, NULL /* user_data */);
1064 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1065 (GLogLevelFlags)log_flags,
1066 tshark_log_handler, NULL /* user_data */);
1067 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1068 (GLogLevelFlags)log_flags,
1069 tshark_log_handler, NULL /* user_data */);
1072 initialize_funnel_ops();
1075 capture_opts_init(&global_capture_opts);
1076 capture_session_init(&global_capture_session, (void *)&cfile);
1079 timestamp_set_type(TS_RELATIVE);
1080 timestamp_set_precision(TS_PREC_AUTO);
1081 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1083 /* Register all dissectors; we must do this before checking for the
1084 "-G" flag, as the "-G" flag dumps information registered by the
1085 dissectors, and we must do it before we read the preferences, in
1086 case any dissectors register preferences. */
1087 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1088 failure_message, open_failure_message, read_failure_message,
1089 write_failure_message);
1091 /* Register all tap listeners; we do this before we parse the arguments,
1092 as the "-z" argument can specify a registered tap. */
1094 /* we register the plugin taps before the other taps because
1095 stats_tree taps plugins will be registered as tap listeners
1096 by stats_tree_stat.c and need to registered before that */
1098 register_all_plugin_tap_listeners();
1100 register_all_tap_listeners();
1102 /* If invoked with the "-G" flag, we dump out information based on
1103 the argument to the "-G" flag; if no argument is specified,
1104 for backwards compatibility we dump out a glossary of display
1107 XXX - we do this here, for now, to support "-G" with no arguments.
1108 If none of our build or other processes uses "-G" with no arguments,
1109 we can just process it with the other arguments. */
1110 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1111 proto_initialize_all_prefixes();
1114 proto_registrar_dump_fields();
1116 if (strcmp(argv[2], "fields") == 0)
1117 proto_registrar_dump_fields();
1118 else if (strcmp(argv[2], "protocols") == 0)
1119 proto_registrar_dump_protocols();
1120 else if (strcmp(argv[2], "values") == 0)
1121 proto_registrar_dump_values();
1122 else if (strcmp(argv[2], "ftypes") == 0)
1123 proto_registrar_dump_ftypes();
1124 else if (strcmp(argv[2], "decodes") == 0)
1125 dissector_dump_decodes();
1126 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1127 dissector_dump_heur_decodes();
1128 else if (strcmp(argv[2], "defaultprefs") == 0)
1130 else if (strcmp(argv[2], "plugins") == 0)
1132 else if (strcmp(argv[2], "?") == 0)
1133 glossary_option_help();
1134 else if (strcmp(argv[2], "-?") == 0)
1135 glossary_option_help();
1136 else if (strcmp(argv[2], "currentprefs") == 0) {
1137 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1138 &pf_open_errno, &pf_read_errno, &pf_path);
1141 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1148 /* Set the C-language locale to the native environment. */
1149 setlocale(LC_ALL, "");
1151 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1152 &pf_open_errno, &pf_read_errno, &pf_path);
1153 if (gpf_path != NULL) {
1154 if (gpf_open_errno != 0) {
1155 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1156 pf_path, g_strerror(gpf_open_errno));
1158 if (gpf_read_errno != 0) {
1159 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1160 pf_path, g_strerror(gpf_read_errno));
1163 if (pf_path != NULL) {
1164 if (pf_open_errno != 0) {
1165 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1166 g_strerror(pf_open_errno));
1168 if (pf_read_errno != 0) {
1169 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1170 pf_path, g_strerror(pf_read_errno));
1176 /* Read the disabled protocols file. */
1177 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1178 &dp_path, &dp_open_errno, &dp_read_errno);
1179 if (gdp_path != NULL) {
1180 if (gdp_open_errno != 0) {
1181 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1182 gdp_path, g_strerror(gdp_open_errno));
1184 if (gdp_read_errno != 0) {
1185 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1186 gdp_path, g_strerror(gdp_read_errno));
1190 if (dp_path != NULL) {
1191 if (dp_open_errno != 0) {
1193 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1194 g_strerror(dp_open_errno));
1196 if (dp_read_errno != 0) {
1198 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1199 g_strerror(dp_read_errno));
1204 check_capture_privs();
1206 cap_file_init(&cfile);
1208 /* Print format defaults to this. */
1209 print_format = PR_FMT_TEXT;
1211 output_fields = output_fields_new();
1213 /* Now get our args */
1214 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1216 case '2': /* Perform two pass analysis */
1217 perform_two_pass_analysis = TRUE;
1219 case 'a': /* autostop criteria */
1220 case 'b': /* Ringbuffer option */
1221 case 'c': /* Capture x packets */
1222 case 'f': /* capture filter */
1223 case 'g': /* enable group read access on file(s) */
1224 case 'i': /* Use interface x */
1225 case 'p': /* Don't capture in promiscuous mode */
1226 #ifdef HAVE_PCAP_REMOTE
1227 case 'A': /* Authentication */
1229 #ifdef HAVE_PCAP_CREATE
1230 case 'I': /* Capture in monitor mode, if available */
1232 case 's': /* Set the snapshot (capture) length */
1233 case 'w': /* Write to capture file x */
1234 case 'y': /* Set the pcap data link type */
1235 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1236 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1237 case 'B': /* Buffer size */
1238 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1240 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1245 capture_option_specified = TRUE;
1250 /* Configuration profile settings were already processed just ignore them this time*/
1252 case 'd': /* Decode as rule */
1253 if (!add_decode_as(optarg))
1256 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1257 case 'K': /* Kerberos keytab file */
1258 read_keytab_file(optarg);
1261 case 'D': /* Print a list of capture devices and exit */
1263 if_list = capture_interface_list(&err, &err_str,NULL);
1264 if (if_list == NULL) {
1266 case CANT_GET_INTERFACE_LIST:
1267 case DONT_HAVE_PCAP:
1268 cmdarg_err("%s", err_str);
1272 case NO_INTERFACES_FOUND:
1273 cmdarg_err("There are no interfaces on which a capture can be done");
1278 capture_opts_print_interfaces(if_list);
1279 free_interface_list(if_list);
1282 capture_option_specified = TRUE;
1288 output_fields_add(output_fields, optarg);
1292 if (!output_fields_set_option(output_fields, optarg)) {
1293 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1294 output_fields_list_options(stderr);
1299 out_file_type = wtap_short_string_to_file_type(optarg);
1300 if (out_file_type < 0) {
1301 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1302 list_capture_types();
1306 case 'W': /* Select extra information to save in our capture file */
1307 /* This is patterned after the -N flag which may not be the best idea. */
1308 if (strchr(optarg, 'n')) {
1309 out_file_name_res = TRUE;
1311 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1315 case 'H': /* Read address to name mappings from a hosts file */
1316 if (! add_hosts_file(optarg))
1318 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1321 out_file_name_res = TRUE;
1324 case 'h': /* Print help and exit */
1328 case 'l': /* "Line-buffer" standard output */
1329 /* This isn't line-buffering, strictly speaking, it's just
1330 flushing the standard output after the information for
1331 each packet is printed; however, that should be good
1332 enough for all the purposes to which "-l" is put (and
1333 is probably actually better for "-V", as it does fewer
1336 See the comment in "process_packet()" for an explanation of
1337 why we do that, and why we don't just use "setvbuf()" to
1338 make the standard output line-buffered (short version: in
1339 Windows, "line-buffered" is the same as "fully-buffered",
1340 and the output buffer is only flushed when it fills up). */
1341 line_buffered = TRUE;
1343 case 'L': /* Print list of link-layer types and exit */
1345 list_link_layer_types = TRUE;
1347 capture_option_specified = TRUE;
1351 case 'n': /* No name resolution */
1352 gbl_resolv_flags.mac_name = FALSE;
1353 gbl_resolv_flags.network_name = FALSE;
1354 gbl_resolv_flags.transport_name = FALSE;
1355 gbl_resolv_flags.concurrent_dns = FALSE;
1357 case 'N': /* Select what types of addresses/port #s to resolve */
1358 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1359 if (badopt != '\0') {
1360 cmdarg_err("-N specifies unknown resolving option '%c';",
1362 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1366 case 'o': /* Override preference from command line */
1367 switch (prefs_set_pref(optarg)) {
1372 case PREFS_SET_SYNTAX_ERR:
1373 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1377 case PREFS_SET_NO_SUCH_PREF:
1378 case PREFS_SET_OBSOLETE:
1379 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1384 case 'q': /* Quiet */
1387 case 'Q': /* Really quiet */
1389 really_quiet = TRUE;
1391 case 'r': /* Read capture file x */
1392 cf_name = g_strdup(optarg);
1394 case 'R': /* Read file filter */
1398 /* already processed; just ignore it now */
1400 case 'S': /* Set the line Separator to be printed between packets */
1401 separator = strdup(optarg);
1403 case 't': /* Time stamp type */
1404 if (strcmp(optarg, "r") == 0)
1405 timestamp_set_type(TS_RELATIVE);
1406 else if (strcmp(optarg, "a") == 0)
1407 timestamp_set_type(TS_ABSOLUTE);
1408 else if (strcmp(optarg, "ad") == 0)
1409 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1410 else if (strcmp(optarg, "d") == 0)
1411 timestamp_set_type(TS_DELTA);
1412 else if (strcmp(optarg, "dd") == 0)
1413 timestamp_set_type(TS_DELTA_DIS);
1414 else if (strcmp(optarg, "e") == 0)
1415 timestamp_set_type(TS_EPOCH);
1416 else if (strcmp(optarg, "u") == 0)
1417 timestamp_set_type(TS_UTC);
1418 else if (strcmp(optarg, "ud") == 0)
1419 timestamp_set_type(TS_UTC_WITH_DATE);
1421 cmdarg_err("Invalid time stamp type \"%s\"",
1423 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1424 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1425 cmdarg_err_cont("or \"ud\" for UTC with date.");
1429 case 'T': /* printing Type */
1430 if (strcmp(optarg, "text") == 0) {
1431 output_action = WRITE_TEXT;
1432 print_format = PR_FMT_TEXT;
1433 } else if (strcmp(optarg, "ps") == 0) {
1434 output_action = WRITE_TEXT;
1435 print_format = PR_FMT_PS;
1436 } else if (strcmp(optarg, "pdml") == 0) {
1437 output_action = WRITE_XML;
1438 print_details = TRUE; /* Need details */
1439 print_summary = FALSE; /* Don't allow summary */
1440 } else if (strcmp(optarg, "psml") == 0) {
1441 output_action = WRITE_XML;
1442 print_details = FALSE; /* Don't allow details */
1443 print_summary = TRUE; /* Need summary */
1444 } else if (strcmp(optarg, "fields") == 0) {
1445 output_action = WRITE_FIELDS;
1446 print_details = TRUE; /* Need full tree info */
1447 print_summary = FALSE; /* Don't allow summary */
1449 cmdarg_err("Invalid -T parameter.");
1450 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1454 case 'u': /* Seconds type */
1455 if (strcmp(optarg, "s") == 0)
1456 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1457 else if (strcmp(optarg, "hms") == 0)
1458 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1460 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1461 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1465 case 'v': /* Show version and exit */
1467 show_version(comp_info_str, runtime_info_str);
1468 g_string_free(comp_info_str, TRUE);
1469 g_string_free(runtime_info_str, TRUE);
1470 /* We don't really have to cleanup here, but it's a convenient way to test
1471 * start-up and shut-down of the epan library without any UI-specific
1472 * cruft getting in the way. Makes the results of running
1473 * $ ./tools/valgrind-wireshark -n
1474 * much more useful. */
1478 case 'O': /* Only output these protocols */
1479 /* already processed; just ignore it now */
1481 case 'V': /* Verbose */
1482 /* already processed; just ignore it now */
1484 case 'x': /* Print packet data in hex (and ASCII) */
1485 /* already processed; just ignore it now */
1493 /* We won't call the init function for the stat this soon
1494 as it would disallow MATE's fields (which are registered
1495 by the preferences set callback) from being used as
1496 part of a tap filter. Instead, we just add the argument
1497 to a list of stat arguments. */
1498 if (!process_stat_cmd_arg(optarg)) {
1499 if (strcmp("help", optarg)==0) {
1500 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1501 list_stat_cmd_args();
1504 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1505 cmdarg_err_cont(" -z argument must be one of :");
1506 list_stat_cmd_args();
1511 case '?': /* Bad flag - print usage message */
1514 list_capture_types();
1524 /* If we specified output fields, but not the output field type... */
1525 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1526 cmdarg_err("Output fields were specified with \"-e\", "
1527 "but \"-Tfields\" was not specified.");
1529 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1530 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1531 "specified with \"-e\".");
1536 /* If no capture filter or display filter has been specified, and there are
1537 still command-line arguments, treat them as the tokens of a capture
1538 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1539 flag was specified. */
1540 if (optind < argc) {
1541 if (cf_name != NULL) {
1542 if (dfilter != NULL) {
1543 cmdarg_err("Display filters were specified both with \"-d\" "
1544 "and with additional command-line arguments.");
1547 dfilter = get_args_as_string(argc, argv, optind);
1552 if (global_capture_opts.default_options.cfilter) {
1553 cmdarg_err("A default capture filter was specified both with \"-f\""
1554 " and with additional command-line arguments.");
1557 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1558 interface_options interface_opts;
1559 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1560 if (interface_opts.cfilter == NULL) {
1561 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1562 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1563 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1565 cmdarg_err("A capture filter was specified both with \"-f\""
1566 " and with additional command-line arguments.");
1570 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1572 capture_option_specified = TRUE;
1578 if (!global_capture_opts.saving_to_file) {
1579 /* We're not saving the capture to a file; if "-q" wasn't specified,
1580 we should print packet information */
1582 print_packet_info = TRUE;
1584 /* We're saving to a file; if we're writing to the standard output.
1585 and we'll also be writing dissected packets to the standard
1586 output, reject the request. At best, we could redirect that
1587 to the standard error; we *can't* write both to the standard
1588 output and have either of them be useful. */
1589 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1590 cmdarg_err("You can't write both raw packet data and dissected packets"
1591 " to the standard output.");
1596 /* We're not saving the capture to a file; if "-q" wasn't specified,
1597 we should print packet information */
1599 print_packet_info = TRUE;
1602 #ifndef HAVE_LIBPCAP
1603 if (capture_option_specified)
1604 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1612 if (output_action != WRITE_TEXT) {
1613 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1618 if (output_only != NULL) {
1621 if (!print_details) {
1622 cmdarg_err("-O requires -V");
1626 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1627 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1628 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1632 if (rfilter != NULL && !perform_two_pass_analysis) {
1633 /* Just a warning, so we don't return */
1634 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1638 if (list_link_layer_types) {
1639 /* We're supposed to list the link-layer types for an interface;
1640 did the user also specify a capture file to be read? */
1642 /* Yes - that's bogus. */
1643 cmdarg_err("You can't specify -L and a capture file to be read.");
1646 /* No - did they specify a ring buffer option? */
1647 if (global_capture_opts.multi_files_on) {
1648 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1654 * "-r" was specified, so we're reading a capture file.
1655 * Capture options don't apply here.
1658 /* We don't support capture filters when reading from a capture file
1659 (the BPF compiler doesn't support all link-layer types that we
1660 support in capture files we read). */
1661 if (global_capture_opts.default_options.cfilter) {
1662 cmdarg_err("Only read filters, not capture filters, "
1663 "can be specified when reading a capture file.");
1666 if (global_capture_opts.multi_files_on) {
1667 cmdarg_err("Multiple capture files requested, but "
1668 "a capture isn't being done.");
1671 if (global_capture_opts.has_file_duration) {
1672 cmdarg_err("Switching capture files after a time interval was specified, but "
1673 "a capture isn't being done.");
1676 if (global_capture_opts.has_ring_num_files) {
1677 cmdarg_err("A ring buffer of capture files was specified, but "
1678 "a capture isn't being done.");
1681 if (global_capture_opts.has_autostop_files) {
1682 cmdarg_err("A maximum number of capture files was specified, but "
1683 "a capture isn't being done.");
1687 /* Note: TShark now allows the restriction of a _read_ file by packet count
1688 * and byte count as well as a write file. Other autostop options remain valid
1689 * only for a write file.
1691 if (global_capture_opts.has_autostop_duration) {
1692 cmdarg_err("A maximum capture time was specified, but "
1693 "a capture isn't being done.");
1698 * "-r" wasn't specified, so we're doing a live capture.
1700 if (global_capture_opts.saving_to_file) {
1701 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1703 /* When capturing, we only support writing pcap or pcap-ng format. */
1704 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1705 cmdarg_err("Live captures can only be saved in libpcap format.");
1708 if (global_capture_opts.multi_files_on) {
1709 /* Multiple-file mode doesn't work under certain conditions:
1710 a) it doesn't work if you're writing to the standard output;
1711 b) it doesn't work if you're writing to a pipe;
1713 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1714 cmdarg_err("Multiple capture files requested, but "
1715 "the capture is being written to the standard output.");
1718 if (global_capture_opts.output_to_pipe) {
1719 cmdarg_err("Multiple capture files requested, but "
1720 "the capture file is a pipe.");
1723 if (!global_capture_opts.has_autostop_filesize &&
1724 !global_capture_opts.has_file_duration) {
1725 cmdarg_err("Multiple capture files requested, but "
1726 "no maximum capture file size or duration was specified.");
1730 /* Currently, we don't support read or display filters when capturing
1731 and saving the packets. */
1732 if (rfilter != NULL) {
1733 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1736 if (dfilter != NULL) {
1737 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1741 /* They didn't specify a "-w" flag, so we won't be saving to a
1742 capture file. Check for options that only make sense if
1743 we're saving to a file. */
1744 if (global_capture_opts.has_autostop_filesize) {
1745 cmdarg_err("Maximum capture file size specified, but "
1746 "capture isn't being saved to a file.");
1749 if (global_capture_opts.multi_files_on) {
1750 cmdarg_err("Multiple capture files requested, but "
1751 "the capture isn't being saved to a file.");
1760 /* Start windows sockets */
1761 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1764 /* Notify all registered modules that have had any of their preferences
1765 changed either from one of the preferences file or from the command
1766 line that their preferences have changed. */
1769 /* At this point MATE will have registered its field array so we can
1770 have a tap filter with one of MATE's late-registered fields as part
1771 of the filter. We can now process all the "-z" arguments. */
1772 start_requested_stats();
1775 /* We currently don't support taps, or printing dissected packets,
1776 if we're writing to a pipe. */
1777 if (global_capture_opts.saving_to_file &&
1778 global_capture_opts.output_to_pipe) {
1779 if (tap_listeners_require_dissection()) {
1780 cmdarg_err("Taps aren't supported when saving to a pipe.");
1783 if (print_packet_info) {
1784 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1790 /* disabled protocols as per configuration file */
1791 if (gdp_path == NULL && dp_path == NULL) {
1792 set_disabled_protos_list();
1795 /* Build the column format array */
1796 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1799 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1800 capture_opts_trim_ring_num_files(&global_capture_opts);
1803 if (rfilter != NULL) {
1804 if (!dfilter_compile(rfilter, &rfcode)) {
1805 cmdarg_err("%s", dfilter_error_msg);
1807 #ifdef HAVE_PCAP_OPEN_DEAD
1811 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1813 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1815 " Note: That read filter code looks like a valid capture filter;");
1817 " maybe you mixed them up?");
1826 cfile.rfcode = rfcode;
1828 if (dfilter != NULL) {
1829 if (!dfilter_compile(dfilter, &dfcode)) {
1830 cmdarg_err("%s", dfilter_error_msg);
1832 #ifdef HAVE_PCAP_OPEN_DEAD
1836 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1838 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1840 " Note: That display filter code looks like a valid capture filter;");
1842 " maybe you mixed them up?");
1851 cfile.dfcode = dfcode;
1853 if (print_packet_info) {
1854 /* If we're printing as text or PostScript, we have
1855 to create a print stream. */
1856 if (output_action == WRITE_TEXT) {
1857 switch (print_format) {
1860 print_stream = print_stream_text_stdio_new(stdout);
1864 print_stream = print_stream_ps_stdio_new(stdout);
1868 g_assert_not_reached();
1873 /* We have to dissect each packet if:
1875 we're printing information about each packet;
1877 we're using a read filter on the packets;
1879 we're using a display filter on the packets;
1881 we're using any taps that need dissection. */
1882 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1886 * We're reading a capture file.
1890 * Immediately relinquish any special privileges we have; we must not
1891 * be allowed to read any capture files the user running TShark
1894 relinquish_special_privs_perm();
1895 print_current_user();
1897 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1902 /* Set timestamp precision; there should arguably be a command-line
1903 option to let the user set this. */
1904 switch(wtap_file_tsprecision(cfile.wth)) {
1905 case(WTAP_FILE_TSPREC_SEC):
1906 timestamp_set_precision(TS_PREC_AUTO_SEC);
1908 case(WTAP_FILE_TSPREC_DSEC):
1909 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1911 case(WTAP_FILE_TSPREC_CSEC):
1912 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1914 case(WTAP_FILE_TSPREC_MSEC):
1915 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1917 case(WTAP_FILE_TSPREC_USEC):
1918 timestamp_set_precision(TS_PREC_AUTO_USEC);
1920 case(WTAP_FILE_TSPREC_NSEC):
1921 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1924 g_assert_not_reached();
1927 /* Process the packets in the file */
1930 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1931 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1932 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1934 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1937 CATCH(OutOfMemoryError) {
1941 "Sorry, but TShark has to terminate now!\n"
1943 "Some infos / workarounds can be found at:\n"
1944 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1949 /* We still dump out the results of taps, etc., as we might have
1950 read some packets; however, we exit with an error status. */
1954 /* No capture file specified, so we're supposed to do a live capture
1955 or get a list of link-layer types for a live capture device;
1956 do we have support for live captures? */
1958 /* if no interface was specified, pick a default */
1959 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1960 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1961 if (exit_status != 0)
1964 /* if requested, list the link layer types and exit */
1965 if (list_link_layer_types) {
1968 /* Get the list of link-layer types for the capture devices. */
1969 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1970 interface_options interface_opts;
1971 if_capabilities_t *caps;
1973 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1974 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1976 cmdarg_err("%s", err_str);
1980 if (caps->data_link_types == NULL) {
1981 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1984 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1985 free_if_capabilities(caps);
1990 if (print_packet_info) {
1991 if (!write_preamble(NULL)) {
1992 show_print_file_io_error(errno);
1995 } else if (!quiet) {
1997 * We're not printing information for each packet, and the user
1998 * didn't ask us not to print a count of packets as they arrive,
1999 * so print that count so the user knows that packets are arriving.
2001 * XXX - what if the user wants to do a live capture, doesn't want
2002 * to save it to a file, doesn't want information printed for each
2003 * packet, does want some "-z" statistic, and wants packet counts
2004 * so they know whether they're seeing any packets?
2006 print_packet_counts = TRUE;
2009 /* For now, assume libpcap gives microsecond precision. */
2010 timestamp_set_precision(TS_PREC_AUTO_USEC);
2013 * XXX - this returns FALSE if an error occurred, but it also
2014 * returns FALSE if the capture stops because a time limit
2015 * was reached (and possibly other limits), so we can't assume
2016 * it means an error.
2018 * The capture code is a bit twisty, so it doesn't appear to
2019 * be an easy fix. We just ignore the return value for now.
2020 * Instead, pass on the exit status from the capture child.
2023 exit_status = global_capture_session.fork_child_status;
2025 if (print_packet_info) {
2026 if (!write_finale()) {
2028 show_print_file_io_error(err);
2032 /* No - complain. */
2033 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2040 if (cfile.frames != NULL) {
2041 free_frame_data_sequence(cfile.frames);
2042 cfile.frames = NULL;
2045 draw_tap_listeners(TRUE);
2046 funnel_dump_all_text_windows();
2049 output_fields_free(output_fields);
2050 output_fields = NULL;
2055 /*#define USE_BROKEN_G_MAIN_LOOP*/
2057 #ifdef USE_BROKEN_G_MAIN_LOOP
2060 gboolean loop_running = FALSE;
2062 guint32 packet_count = 0;
2065 /* XXX - move to the right position / file */
2066 /* read from a pipe (callback) */
2067 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2069 typedef struct pipe_input_tag {
2073 pipe_input_cb_t input_cb;
2074 guint pipe_input_id;
2076 GMutex *callback_running;
2080 static pipe_input_t pipe_input;
2083 /* The timer has expired, see if there's stuff to read from the pipe,
2084 if so, do the callback */
2086 pipe_timer_cb(gpointer data)
2092 pipe_input_t *pipe_input_p = data;
2093 gint iterations = 0;
2095 g_mutex_lock (pipe_input_p->callback_running);
2097 /* try to read data from the pipe only 5 times, to avoid blocking */
2098 while(iterations < 5) {
2099 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2101 /* Oddly enough although Named pipes don't work on win9x,
2102 PeekNamedPipe does !!! */
2103 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2104 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2106 /* Get the child process exit status */
2107 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2110 /* If the Peek returned an error, or there are bytes to be read
2111 or the childwatcher thread has terminated then call the normal
2113 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2115 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2117 /* And call the real handler */
2118 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2119 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2120 /* pipe closed, return false so that the timer is stopped */
2121 g_mutex_unlock (pipe_input_p->callback_running);
2126 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2127 /* No data, stop now */
2134 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2136 g_mutex_unlock (pipe_input_p->callback_running);
2138 /* we didn't stopped the timer, so let it run */
2145 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2148 pipe_input.source = source;
2149 pipe_input.child_process = child_process;
2150 pipe_input.user_data = user_data;
2151 pipe_input.input_cb = input_cb;
2154 #if GLIB_CHECK_VERSION(2,31,0)
2155 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2156 g_mutex_init(pipe_input.callback_running);
2158 pipe_input.callback_running = g_mutex_new();
2160 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2161 do this but that doesn't cover all win32 platforms. GTK can do
2162 this but doesn't seem to work over processes. Attempt to do
2163 something similar here, start a timer and check for data on every
2165 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2166 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2170 static const nstime_t *
2171 tshark_get_frame_ts(void *data, guint32 frame_num)
2173 capture_file *cf = (capture_file *) data;
2175 if (ref && ref->num == frame_num)
2176 return &ref->abs_ts;
2178 if (prev_dis && prev_dis->num == frame_num)
2179 return &prev_dis->abs_ts;
2181 if (prev_cap && prev_cap->num == frame_num)
2182 return &prev_cap->abs_ts;
2185 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2187 return (fd) ? &fd->abs_ts : NULL;
2194 tshark_epan_new(capture_file *cf)
2196 epan_t *epan = epan_new();
2199 epan->get_frame_ts = tshark_get_frame_ts;
2200 epan->get_interface_name = cap_file_get_interface_name;
2211 GString *str = g_string_new("");
2212 #ifdef USE_TSHARK_SELECT
2216 struct sigaction action, oldaction;
2220 * XXX - dropping privileges is still required, until code cleanup is done
2222 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2223 * when it's done, we don't need special privileges to run tshark at all,
2224 * therefore we don't need to drop these privileges
2225 * The only thing we might want to keep is a warning if tshark is run as root,
2226 * as it's no longer necessary and potentially dangerous.
2228 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2229 * We've opened the capture device, so we shouldn't need any special
2230 * privileges any more; relinquish those privileges.
2232 * XXX - if we have saved set-user-ID support, we should give up those
2233 * privileges immediately, and then reclaim them long enough to get
2234 * a list of network interfaces and to open one, and then give them
2235 * up again, so that stuff we do while processing the argument list,
2236 * reading the user's preferences, loading and starting plugins
2237 * (especially *user* plugins), etc. is done with the user's privileges,
2238 * not special privileges.
2240 relinquish_special_privs_perm();
2241 print_current_user();
2243 /* Create new dissection section. */
2244 epan_free(cfile.epan);
2245 cfile.epan = tshark_epan_new(&cfile);
2248 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2249 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2251 /* Catch SIGINT and SIGTERM and, if we get either of them,
2252 clean up and exit. If SIGHUP isn't being ignored, catch
2253 it too and, if we get it, clean up and exit.
2255 We restart any read that was in progress, so that it doesn't
2256 disrupt reading from the sync pipe. The signal handler tells
2257 the capture child to finish; it will report that it finished,
2258 or will exit abnormally, so we'll stop reading from the sync
2259 pipe, pick up the exit status, and quit. */
2260 memset(&action, 0, sizeof(action));
2261 action.sa_handler = capture_cleanup;
2262 action.sa_flags = SA_RESTART;
2263 sigemptyset(&action.sa_mask);
2264 sigaction(SIGTERM, &action, NULL);
2265 sigaction(SIGINT, &action, NULL);
2266 sigaction(SIGHUP, NULL, &oldaction);
2267 if (oldaction.sa_handler == SIG_DFL)
2268 sigaction(SIGHUP, &action, NULL);
2271 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2272 quiet mode, report the number of packets we've captured.
2274 Again, restart any read that was in progress, so that it doesn't
2275 disrupt reading from the sync pipe. */
2276 action.sa_handler = report_counts_siginfo;
2277 action.sa_flags = SA_RESTART;
2278 sigemptyset(&action.sa_mask);
2279 sigaction(SIGINFO, &action, NULL);
2280 #endif /* SIGINFO */
2283 global_capture_session.state = CAPTURE_PREPARING;
2285 /* Let the user know which interfaces were chosen. */
2286 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2287 interface_options interface_opts;
2289 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2290 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2291 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2292 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2295 if (global_capture_opts.ifaces->len < 2) {
2297 if (global_capture_opts.ifaces->len < 4) {
2299 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2300 interface_options interface_opts;
2302 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2304 if (global_capture_opts.ifaces->len > 2) {
2305 g_string_append_printf(str, ",");
2307 g_string_append_printf(str, " ");
2308 if (i == global_capture_opts.ifaces->len - 1) {
2309 g_string_append_printf(str, "and ");
2312 g_string_append_printf(str, "'%s'", interface_opts.descr);
2315 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2317 if (really_quiet == FALSE)
2318 fprintf(stderr, "Capturing on %s\n", str->str);
2320 g_string_free(str, TRUE);
2322 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2327 /* the actual capture loop
2329 * XXX - glib doesn't seem to provide any event based loop handling.
2331 * XXX - for whatever reason,
2332 * calling g_main_loop_new() ends up in 100% cpu load.
2334 * But that doesn't matter: in UNIX we can use select() to find an input
2335 * source with something to do.
2337 * But that doesn't matter because we're in a CLI (that doesn't need to
2338 * update a GUI or something at the same time) so it's OK if we block
2339 * trying to read from the pipe.
2341 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2342 * wrong (but I leave it there in case I am...).
2345 #ifdef USE_TSHARK_SELECT
2347 FD_SET(pipe_input.source, &readfds);
2350 loop_running = TRUE;
2354 while (loop_running)
2356 #ifdef USE_TSHARK_SELECT
2357 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2363 } else if (ret == 1) {
2365 /* Call the real handler */
2366 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2367 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2370 #ifdef USE_TSHARK_SELECT
2375 CATCH(OutOfMemoryError) {
2379 "Sorry, but TShark has to terminate now!\n"
2381 "Some infos / workarounds can be found at:\n"
2382 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2389 /* capture child detected an error */
2391 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2393 cmdarg_err("%s", error_msg);
2394 cmdarg_err_cont("%s", secondary_error_msg);
2398 /* capture child detected an capture filter related error */
2400 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2402 capture_options *capture_opts = cap_session->capture_opts;
2403 dfilter_t *rfcode = NULL;
2404 interface_options interface_opts;
2406 g_assert(i < capture_opts->ifaces->len);
2407 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2409 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2411 "Invalid capture filter \"%s\" for interface %s!\n"
2413 "That string looks like a valid display filter; however, it isn't a valid\n"
2414 "capture filter (%s).\n"
2416 "Note that display filters and capture filters don't have the same syntax,\n"
2417 "so you can't use most display filter expressions as capture filters.\n"
2419 "See the User's Guide for a description of the capture filter syntax.",
2420 interface_opts.cfilter, interface_opts.descr, error_message);
2421 dfilter_free(rfcode);
2424 "Invalid capture filter \"%s\" for interface %s!\n"
2426 "That string isn't a valid capture filter (%s).\n"
2427 "See the User's Guide for a description of the capture filter syntax.",
2428 interface_opts.cfilter, interface_opts.descr, error_message);
2433 /* capture child tells us we have a new (or the first) capture file */
2435 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2437 capture_options *capture_opts = cap_session->capture_opts;
2438 gboolean is_tempfile;
2441 if (cap_session->state == CAPTURE_PREPARING) {
2442 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2444 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2446 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2448 /* free the old filename */
2449 if (capture_opts->save_file != NULL) {
2451 /* we start a new capture file, close the old one (if we had one before) */
2452 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2453 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2454 wtap_close(((capture_file *) cap_session->cf)->wth);
2456 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2459 g_free(capture_opts->save_file);
2460 is_tempfile = FALSE;
2462 /* we didn't had a save_file before, must be a tempfile */
2466 /* save the new filename */
2467 capture_opts->save_file = g_strdup(new_file);
2469 /* if we are in real-time mode, open the new file now */
2470 if (do_dissection) {
2471 /* Attempt to open the capture file and set up to read from it. */
2472 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2476 /* Don't unlink (delete) the save file - leave it around,
2477 for debugging purposes. */
2478 g_free(capture_opts->save_file);
2479 capture_opts->save_file = NULL;
2484 cap_session->state = CAPTURE_RUNNING;
2490 /* capture child tells us we have new packets to read */
2492 capture_input_new_packets(capture_session *cap_session, int to_read)
2498 capture_file *cf = (capture_file *)cap_session->cf;
2499 gboolean filtering_tap_listeners;
2504 * Prevent a SIGINFO handler from writing to the standard error while
2505 * we're doing so or writing to the standard output; instead, have it
2506 * just set a flag telling us to print that information when we're done.
2509 #endif /* SIGINFO */
2511 /* Do we have any tap listeners with filters? */
2512 filtering_tap_listeners = have_filtering_tap_listeners();
2514 /* Get the union of the flags for all tap listeners. */
2515 tap_flags = union_of_tap_listener_flags();
2517 if (do_dissection) {
2518 while (to_read-- && cf->wth) {
2519 wtap_cleareof(cf->wth);
2520 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2522 /* read from file failed, tell the capture child to stop */
2523 sync_pipe_stop(cap_session);
2524 wtap_close(cf->wth);
2527 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2528 wtap_buf_ptr(cf->wth),
2529 filtering_tap_listeners, tap_flags);
2532 /* packet successfully read and gone through the "Read Filter" */
2538 * Dumpcap's doing all the work; we're not doing any dissection.
2539 * Count all the packets it wrote.
2541 packet_count += to_read;
2544 if (print_packet_counts) {
2545 /* We're printing packet counts. */
2546 if (packet_count != 0) {
2547 fprintf(stderr, "\r%u ", packet_count);
2548 /* stderr could be line buffered */
2555 * Allow SIGINFO handlers to write.
2560 * If a SIGINFO handler asked us to write out capture counts, do so.
2564 #endif /* SIGINFO */
2570 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2571 /* Report the count only if we aren't printing a packet count
2572 as packets arrive. */
2573 fprintf(stderr, "%u packet%s captured\n", packet_count,
2574 plurality(packet_count, "", "s"));
2577 infoprint = FALSE; /* we just reported it */
2578 #endif /* SIGINFO */
2583 report_counts_siginfo(int signum _U_)
2585 int sav_errno = errno;
2586 /* If we've been told to delay printing, just set a flag asking
2587 that we print counts (if we're supposed to), otherwise print
2588 the count of packets captured (if we're supposed to). */
2595 #endif /* SIGINFO */
2598 /* capture child detected any packet drops? */
2600 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2602 if (print_packet_counts) {
2603 /* We're printing packet counts to stderr.
2604 Send a newline so that we move to the line after the packet count. */
2605 fprintf(stderr, "\n");
2609 /* We're printing packet counts to stderr.
2610 Send a newline so that we move to the line after the packet count. */
2611 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2617 * Capture child closed its side of the pipe, report any error and
2618 * do the required cleanup.
2621 capture_input_closed(capture_session *cap_session, gchar *msg)
2623 capture_file *cf = (capture_file *) cap_session->cf;
2626 fprintf(stderr, "tshark: %s\n", msg);
2630 if (cf != NULL && cf->wth != NULL) {
2631 wtap_close(cf->wth);
2632 if (cf->is_tempfile) {
2633 ws_unlink(cf->filename);
2636 #ifdef USE_BROKEN_G_MAIN_LOOP
2637 /*g_main_loop_quit(loop);*/
2640 loop_running = FALSE;
2649 capture_cleanup(DWORD ctrltype _U_)
2651 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2652 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2653 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2654 like SIGTERM at least when the machine's shutting down.
2656 For now, we handle them all as indications that we should clean up
2657 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2660 We must return TRUE so that no other handler - such as one that would
2661 terminate the process - gets called.
2663 XXX - for some reason, typing ^C to TShark, if you run this in
2664 a Cygwin console window in at least some versions of Cygwin,
2665 causes TShark to terminate immediately; this routine gets
2666 called, but the main loop doesn't get a chance to run and
2667 exit cleanly, at least if this is compiled with Microsoft Visual
2668 C++ (i.e., it's a property of the Cygwin console window or Bash;
2669 it happens if TShark is not built with Cygwin - for all I know,
2670 building it with Cygwin may make the problem go away). */
2672 /* tell the capture child to stop */
2673 sync_pipe_stop(&global_capture_session);
2675 /* don't stop our own loop already here, otherwise status messages and
2676 * cleanup wouldn't be done properly. The child will indicate the stop of
2677 * everything by calling capture_input_closed() later */
2683 capture_cleanup(int signum _U_)
2685 /* tell the capture child to stop */
2686 sync_pipe_stop(&global_capture_session);
2688 /* don't stop our own loop already here, otherwise status messages and
2689 * cleanup wouldn't be done properly. The child will indicate the stop of
2690 * everything by calling capture_input_closed() later */
2693 #endif /* HAVE_LIBPCAP */
2696 process_packet_first_pass(capture_file *cf,
2697 gint64 offset, struct wtap_pkthdr *whdr,
2702 gboolean create_proto_tree = FALSE;
2706 /* The frame number of this packet is one more than the count of
2707 frames in this packet. */
2708 framenum = cf->count + 1;
2710 /* If we're not running a display filter and we're not printing any
2711 packet information, we don't need to do a dissection. This means
2712 that all packets can be marked as 'passed'. */
2715 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2717 /* If we're going to print packet information, or we're going to
2718 run a read filter, or display filter, or we're going to process taps, set up to
2719 do a dissection and do so. */
2720 if (do_dissection) {
2721 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2722 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2723 /* Grab any resolved addresses */
2724 host_name_lookup_process();
2726 /* If we're going to be applying a filter, we'll need to
2727 create a protocol tree against which to apply the filter. */
2729 create_proto_tree = TRUE;
2731 /* We're not going to display the protocol tree on this pass,
2732 so it's not going to be "visible". */
2733 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2735 /* If we're running a read filter, prime the epan_dissect_t with that
2738 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2740 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2742 if (ref == &fdlocal) {
2743 ref_frame = fdlocal;
2747 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2749 /* Run the read filter if we have one. */
2751 passed = dfilter_apply_edt(cf->rfcode, &edt);
2755 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2756 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2758 /* If we're not doing dissection then there won't be any dependent frames.
2759 * More importantly, edt.pi.dependent_frames won't be initialized because
2760 * epan hasn't been initialized.
2762 if (do_dissection) {
2763 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2768 /* if we don't add it to the frame_data_sequence, clean it up right now
2770 frame_data_destroy(&fdlocal);
2774 epan_dissect_cleanup(&edt);
2780 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2781 struct wtap_pkthdr *phdr, Buffer *buf,
2782 gboolean filtering_tap_listeners, guint tap_flags)
2784 gboolean create_proto_tree;
2789 /* If we're not running a display filter and we're not printing any
2790 packet information, we don't need to do a dissection. This means
2791 that all packets can be marked as 'passed'. */
2794 /* If we're going to print packet information, or we're going to
2795 run a read filter, or we're going to process taps, set up to
2796 do a dissection and do so. */
2797 if (do_dissection) {
2798 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2799 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2800 /* Grab any resolved addresses */
2801 host_name_lookup_process();
2803 if (cf->dfcode || print_details || filtering_tap_listeners ||
2804 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2805 create_proto_tree = TRUE;
2807 create_proto_tree = FALSE;
2809 /* The protocol tree will be "visible", i.e., printed, only if we're
2810 printing packet details, which is true if we're printing stuff
2811 ("print_packet_info" is true) and we're in verbose mode
2812 ("packet_details" is true). */
2813 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2815 /* If we're running a display filter, prime the epan_dissect_t with that
2818 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2820 col_custom_prime_edt(&edt, &cf->cinfo);
2822 /* We only need the columns if either
2823 1) some tap needs the columns
2825 2) we're printing packet info but we're *not* verbose; in verbose
2826 mode, we print the protocol tree, not the protocol summary.
2828 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2833 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2840 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2842 /* Run the read/display filter if we have one. */
2844 passed = dfilter_apply_edt(cf->dfcode, &edt);
2848 frame_data_set_after_dissect(fdata, &cum_bytes);
2849 /* Process this packet. */
2850 if (print_packet_info) {
2851 /* We're printing packet information; print the information for
2854 print_packet(cf, &edt);
2856 print_packet(cf, NULL);
2858 /* The ANSI C standard does not appear to *require* that a line-buffered
2859 stream be flushed to the host environment whenever a newline is
2860 written, it just says that, on such a stream, characters "are
2861 intended to be transmitted to or from the host environment as a
2862 block when a new-line character is encountered".
2864 The Visual C++ 6.0 C implementation doesn't do what is intended;
2865 even if you set a stream to be line-buffered, it still doesn't
2866 flush the buffer at the end of every line.
2868 So, if the "-l" flag was specified, we flush the standard output
2869 at the end of a packet. This will do the right thing if we're
2870 printing packet summary lines, and, as we print the entire protocol
2871 tree for a single packet without waiting for anything to happen,
2872 it should be as good as line-buffered mode if we're printing
2873 protocol trees. (The whole reason for the "-l" flag in either
2874 tcpdump or TShark is to allow the output of a live capture to
2875 be piped to a program or script and to have that script see the
2876 information for the packet as soon as it's printed, rather than
2877 having to wait until a standard I/O buffer fills up. */
2881 if (ferror(stdout)) {
2882 show_print_file_io_error(errno);
2890 if (do_dissection) {
2891 epan_dissect_cleanup(&edt);
2893 return passed || fdata->flags.dependent_of_displayed;
2897 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2898 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2901 int snapshot_length;
2905 gchar *err_info = NULL;
2907 char *save_file_string = NULL;
2908 gboolean filtering_tap_listeners;
2910 wtapng_section_t *shb_hdr;
2911 wtapng_iface_descriptions_t *idb_inf;
2915 shb_hdr = wtap_file_get_shb_info(cf->wth);
2916 idb_inf = wtap_file_get_idb_info(cf->wth);
2917 #ifdef PCAP_NG_DEFAULT
2918 if (idb_inf->number_of_interfaces > 1) {
2919 linktype = WTAP_ENCAP_PER_PACKET;
2921 linktype = wtap_file_encap(cf->wth);
2924 linktype = wtap_file_encap(cf->wth);
2926 if (save_file != NULL) {
2927 /* Get a string that describes what we're writing to */
2928 save_file_string = output_file_description(save_file);
2930 /* Set up to write to the capture file. */
2931 snapshot_length = wtap_snapshot_length(cf->wth);
2932 if (snapshot_length == 0) {
2933 /* Snapshot length of input file not known. */
2934 snapshot_length = WTAP_MAX_PACKET_SIZE;
2936 /* If we don't have an application name add Tshark */
2937 if (shb_hdr->shb_user_appl == NULL) {
2938 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2939 shb_hdr->shb_user_appl = appname;
2942 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2943 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2944 snapshot_length, FALSE /* compressed */, &err);
2946 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2947 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2953 /* We couldn't set up to write to the capture file. */
2956 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2957 cmdarg_err("Capture files can't be written in that format.");
2960 case WTAP_ERR_UNSUPPORTED_ENCAP:
2961 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2962 cmdarg_err("The capture file being read can't be written as a "
2963 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2966 case WTAP_ERR_CANT_OPEN:
2967 cmdarg_err("The %s couldn't be created for some "
2968 "unknown reason.", save_file_string);
2971 case WTAP_ERR_SHORT_WRITE:
2972 cmdarg_err("A full header couldn't be written to the %s.",
2977 cmdarg_err("The %s could not be created: %s.", save_file_string,
2978 wtap_strerror(err));
2984 if (print_packet_info) {
2985 if (!write_preamble(cf)) {
2987 show_print_file_io_error(err);
2994 if (pdh && out_file_name_res) {
2995 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2996 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2997 wtap_file_type_short_string(out_file_type));
3001 /* Do we have any tap listeners with filters? */
3002 filtering_tap_listeners = have_filtering_tap_listeners();
3004 /* Get the union of the flags for all tap listeners. */
3005 tap_flags = union_of_tap_listener_flags();
3007 if (perform_two_pass_analysis) {
3009 int old_max_packet_count = max_packet_count;
3011 /* Allocate a frame_data_sequence for all the frames. */
3012 cf->frames = new_frame_data_sequence();
3014 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3015 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3016 wtap_buf_ptr(cf->wth))) {
3017 /* Stop reading if we have the maximum number of packets;
3018 * When the -c option has not been used, max_packet_count
3019 * starts at 0, which practically means, never stop reading.
3020 * (unless we roll over max_packet_count ?)
3022 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3023 err = 0; /* This is not an error */
3029 /* Close the sequential I/O side, to free up memory it requires. */
3030 wtap_sequential_close(cf->wth);
3032 /* Allow the protocol dissectors to free up memory that they
3033 * don't need after the sequential run-through of the packets. */
3034 postseq_cleanup_all_protocols();
3036 max_packet_count = old_max_packet_count;
3040 buffer_init(&buf, 1500);
3041 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3042 fdata = frame_data_sequence_find(cf->frames, framenum);
3043 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3044 &buf, fdata->cap_len, &err, &err_info)) {
3045 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3046 filtering_tap_listeners, tap_flags)) {
3047 /* Either there's no read filtering or this packet passed the
3048 filter, so, if we're writing to a capture file, write
3051 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3052 /* Error writing to a capture file */
3055 case WTAP_ERR_UNSUPPORTED_ENCAP:
3057 * This is a problem with the particular frame we're writing;
3058 * note that, and give the frame number.
3060 * XXX - framenum is not necessarily the frame number in
3061 * the input file if there was a read filter.
3064 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3065 framenum, cf->filename,
3066 wtap_file_type_short_string(out_file_type));
3070 show_capture_file_io_error(save_file, err, FALSE);
3073 wtap_dump_close(pdh, &err);
3078 /* Stop reading if we have the maximum number of packets;
3079 * When the -c option has not been used, max_packet_count
3080 * starts at 0, which practically means, never stop reading.
3081 * (unless we roll over max_packet_count ?)
3083 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3084 err = 0; /* This is not an error */
3094 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3097 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3098 wtap_buf_ptr(cf->wth),
3099 filtering_tap_listeners, tap_flags)) {
3100 /* Either there's no read filtering or this packet passed the
3101 filter, so, if we're writing to a capture file, write
3104 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3105 /* Error writing to a capture file */
3108 case WTAP_ERR_UNSUPPORTED_ENCAP:
3110 * This is a problem with the particular frame we're writing;
3111 * note that, and give the frame number.
3114 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3115 framenum, cf->filename,
3116 wtap_file_type_short_string(out_file_type));
3120 show_capture_file_io_error(save_file, err, FALSE);
3123 wtap_dump_close(pdh, &err);
3128 /* Stop reading if we have the maximum number of packets;
3129 * When the -c option has not been used, max_packet_count
3130 * starts at 0, which practically means, never stop reading.
3131 * (unless we roll over max_packet_count ?)
3133 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3134 err = 0; /* This is not an error */
3143 * Print a message noting that the read failed somewhere along the line.
3145 * If we're printing packet data, and the standard output and error are
3146 * going to the same place, flush the standard output, so everything
3147 * buffered up is written, and then print a newline to the standard error
3148 * before printing the error message, to separate it from the packet
3149 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3150 * the _fstat() documentation at Microsoft doesn't indicate whether
3151 * st_ino is even supported.)
3154 if (print_packet_info) {
3155 struct stat stat_stdout, stat_stderr;
3157 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3158 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3159 stat_stdout.st_ino == stat_stderr.st_ino) {
3161 fprintf(stderr, "\n");
3168 case WTAP_ERR_UNSUPPORTED:
3169 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3170 cf->filename, err_info);
3174 case WTAP_ERR_UNSUPPORTED_ENCAP:
3175 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3176 cf->filename, err_info);
3180 case WTAP_ERR_CANT_READ:
3181 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3185 case WTAP_ERR_SHORT_READ:
3186 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3190 case WTAP_ERR_BAD_FILE:
3191 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3192 cf->filename, err_info);
3196 case WTAP_ERR_DECOMPRESS:
3197 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3198 "(%s)", cf->filename, err_info);
3202 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3203 cf->filename, wtap_strerror(err));
3206 if (save_file != NULL) {
3207 /* Now close the capture file. */
3208 if (!wtap_dump_close(pdh, &err))
3209 show_capture_file_io_error(save_file, err, TRUE);
3212 if (save_file != NULL) {
3213 /* Now close the capture file. */
3214 if (!wtap_dump_close(pdh, &err))
3215 show_capture_file_io_error(save_file, err, TRUE);
3217 if (print_packet_info) {
3218 if (!write_finale()) {
3220 show_print_file_io_error(err);
3227 wtap_close(cf->wth);
3230 g_free(save_file_string);
3237 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3239 gboolean filtering_tap_listeners, guint tap_flags)
3242 gboolean create_proto_tree;
3247 /* Count this packet. */
3250 /* If we're not running a display filter and we're not printing any
3251 packet information, we don't need to do a dissection. This means
3252 that all packets can be marked as 'passed'. */
3255 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3257 /* If we're going to print packet information, or we're going to
3258 run a read filter, or we're going to process taps, set up to
3259 do a dissection and do so. */
3260 if (do_dissection) {
3261 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3262 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3263 /* Grab any resolved addresses */
3264 host_name_lookup_process();
3266 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3267 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3268 create_proto_tree = TRUE;
3270 create_proto_tree = FALSE;
3272 /* The protocol tree will be "visible", i.e., printed, only if we're
3273 printing packet details, which is true if we're printing stuff
3274 ("print_packet_info" is true) and we're in verbose mode
3275 ("packet_details" is true). */
3276 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3278 /* If we're running a filter, prime the epan_dissect_t with that
3281 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3283 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3285 col_custom_prime_edt(&edt, &cf->cinfo);
3287 /* We only need the columns if either
3288 1) some tap needs the columns
3290 2) we're printing packet info but we're *not* verbose; in verbose
3291 mode, we print the protocol tree, not the protocol summary.
3293 3) there is a column mapped as an individual field */
3294 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3299 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3301 if (ref == &fdata) {
3306 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3308 /* Run the filters if we have them. */
3310 passed = dfilter_apply_edt(cf->rfcode, &edt);
3311 if (passed && cf->dfcode)
3312 passed = dfilter_apply_edt(cf->dfcode, &edt);
3316 frame_data_set_after_dissect(&fdata, &cum_bytes);
3318 /* Process this packet. */
3319 if (print_packet_info) {
3320 /* We're printing packet information; print the information for
3323 print_packet(cf, &edt);
3325 print_packet(cf, NULL);
3327 /* The ANSI C standard does not appear to *require* that a line-buffered
3328 stream be flushed to the host environment whenever a newline is
3329 written, it just says that, on such a stream, characters "are
3330 intended to be transmitted to or from the host environment as a
3331 block when a new-line character is encountered".
3333 The Visual C++ 6.0 C implementation doesn't do what is intended;
3334 even if you set a stream to be line-buffered, it still doesn't
3335 flush the buffer at the end of every line.
3337 So, if the "-l" flag was specified, we flush the standard output
3338 at the end of a packet. This will do the right thing if we're
3339 printing packet summary lines, and, as we print the entire protocol
3340 tree for a single packet without waiting for anything to happen,
3341 it should be as good as line-buffered mode if we're printing
3342 protocol trees. (The whole reason for the "-l" flag in either
3343 tcpdump or TShark is to allow the output of a live capture to
3344 be piped to a program or script and to have that script see the
3345 information for the packet as soon as it's printed, rather than
3346 having to wait until a standard I/O buffer fills up. */
3350 if (ferror(stdout)) {
3351 show_print_file_io_error(errno);
3356 /* this must be set after print_packet() [bug #8160] */
3357 prev_dis_frame = fdata;
3358 prev_dis = &prev_dis_frame;
3361 prev_cap_frame = fdata;
3362 prev_cap = &prev_cap_frame;
3364 if (do_dissection) {
3365 epan_dissect_cleanup(&edt);
3366 frame_data_destroy(&fdata);
3372 write_preamble(capture_file *cf)
3374 switch (output_action) {
3377 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3381 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3383 write_psml_preamble(stdout);
3384 return !ferror(stdout);
3387 write_fields_preamble(output_fields, stdout);
3388 return !ferror(stdout);
3391 g_assert_not_reached();
3397 get_line_buf(size_t len)
3399 static char *line_bufp = NULL;
3400 static size_t line_buf_len = 256;
3401 size_t new_line_buf_len;
3403 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3404 new_line_buf_len *= 2)
3406 if (line_bufp == NULL) {
3407 line_buf_len = new_line_buf_len;
3408 line_bufp = (char *)g_malloc(line_buf_len + 1);
3410 if (new_line_buf_len > line_buf_len) {
3411 line_buf_len = new_line_buf_len;
3412 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3419 print_columns(capture_file *cf)
3426 line_bufp = get_line_buf(256);
3429 for (i = 0; i < cf->cinfo.num_cols; i++) {
3430 /* Skip columns not marked as visible. */
3431 if (!get_column_visible(i))
3433 switch (cf->cinfo.col_fmt[i]) {
3437 * Don't print this if we're doing a live capture from a network
3438 * interface - if we're doing a live capture, you won't be
3439 * able to look at the capture in the future (it's not being
3440 * saved anywhere), so the frame numbers are unlikely to be
3443 * (XXX - it might be nice to be able to save and print at
3444 * the same time, sort of like an "Update list of packets
3445 * in real time" capture in Wireshark.)
3447 if (global_capture_opts.ifaces->len > 0)
3450 column_len = strlen(cf->cinfo.col_data[i]);
3453 line_bufp = get_line_buf(buf_offset + column_len);
3454 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3460 case COL_ABS_DATE_TIME:
3462 case COL_UTC_DATE_TIME: /* XXX - wider */
3463 column_len = strlen(cf->cinfo.col_data[i]);
3464 if (column_len < 10)
3466 line_bufp = get_line_buf(buf_offset + column_len);
3467 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3473 case COL_DEF_DL_SRC:
3474 case COL_RES_DL_SRC:
3475 case COL_UNRES_DL_SRC:
3476 case COL_DEF_NET_SRC:
3477 case COL_RES_NET_SRC:
3478 case COL_UNRES_NET_SRC:
3479 column_len = strlen(cf->cinfo.col_data[i]);
3480 if (column_len < 12)
3482 line_bufp = get_line_buf(buf_offset + column_len);
3483 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3489 case COL_DEF_DL_DST:
3490 case COL_RES_DL_DST:
3491 case COL_UNRES_DL_DST:
3492 case COL_DEF_NET_DST:
3493 case COL_RES_NET_DST:
3494 case COL_UNRES_NET_DST:
3495 column_len = strlen(cf->cinfo.col_data[i]);
3496 if (column_len < 12)
3498 line_bufp = get_line_buf(buf_offset + column_len);
3499 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3503 column_len = strlen(cf->cinfo.col_data[i]);
3504 line_bufp = get_line_buf(buf_offset + column_len);
3505 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3508 buf_offset += column_len;
3509 if (i != cf->cinfo.num_cols - 1) {
3511 * This isn't the last column, so we need to print a
3512 * separator between this column and the next.
3514 * If we printed a network source and are printing a
3515 * network destination of the same type next, separate
3516 * them with " -> "; if we printed a network destination
3517 * and are printing a network source of the same type
3518 * next, separate them with " <- "; otherwise separate them
3521 * We add enough space to the buffer for " <- " or " -> ",
3522 * even if we're only adding " ".
3524 line_bufp = get_line_buf(buf_offset + 4);
3525 switch (cf->cinfo.col_fmt[i]) {
3530 switch (cf->cinfo.col_fmt[i + 1]) {
3535 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3540 g_strlcat(line_bufp + buf_offset, " ", 5);
3546 case COL_DEF_DL_SRC:
3547 case COL_RES_DL_SRC:
3548 case COL_UNRES_DL_SRC:
3549 switch (cf->cinfo.col_fmt[i + 1]) {
3551 case COL_DEF_DL_DST:
3552 case COL_RES_DL_DST:
3553 case COL_UNRES_DL_DST:
3554 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3559 g_strlcat(line_bufp + buf_offset, " ", 5);
3565 case COL_DEF_NET_SRC:
3566 case COL_RES_NET_SRC:
3567 case COL_UNRES_NET_SRC:
3568 switch (cf->cinfo.col_fmt[i + 1]) {
3570 case COL_DEF_NET_DST:
3571 case COL_RES_NET_DST:
3572 case COL_UNRES_NET_DST:
3573 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3578 g_strlcat(line_bufp + buf_offset, " ", 5);
3587 switch (cf->cinfo.col_fmt[i + 1]) {
3592 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3597 g_strlcat(line_bufp + buf_offset, " ", 5);
3603 case COL_DEF_DL_DST:
3604 case COL_RES_DL_DST:
3605 case COL_UNRES_DL_DST:
3606 switch (cf->cinfo.col_fmt[i + 1]) {
3608 case COL_DEF_DL_SRC:
3609 case COL_RES_DL_SRC:
3610 case COL_UNRES_DL_SRC:
3611 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3616 g_strlcat(line_bufp + buf_offset, " ", 5);
3622 case COL_DEF_NET_DST:
3623 case COL_RES_NET_DST:
3624 case COL_UNRES_NET_DST:
3625 switch (cf->cinfo.col_fmt[i + 1]) {
3627 case COL_DEF_NET_SRC:
3628 case COL_RES_NET_SRC:
3629 case COL_UNRES_NET_SRC:
3630 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3635 g_strlcat(line_bufp + buf_offset, " ", 5);
3642 g_strlcat(line_bufp + buf_offset, " ", 5);
3648 return print_line(print_stream, 0, line_bufp);
3652 print_packet(capture_file *cf, epan_dissect_t *edt)
3654 print_args_t print_args;
3656 if (print_summary || output_fields_has_cols(output_fields)) {
3657 /* Just fill in the columns. */
3658 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3660 if (print_summary) {
3661 /* Now print them. */
3662 switch (output_action) {
3665 if (!print_columns(cf))
3670 proto_tree_write_psml(edt, stdout);
3671 return !ferror(stdout);
3672 case WRITE_FIELDS: /*No non-verbose "fields" format */
3673 g_assert_not_reached();
3678 if (print_details) {
3679 /* Print the information in the protocol tree. */
3680 switch (output_action) {
3683 /* Only initialize the fields that are actually used in proto_tree_print.
3684 * This is particularly important for .range, as that's heap memory which
3685 * we would otherwise have to g_free().
3686 print_args.to_file = TRUE;
3687 print_args.format = print_format;
3688 print_args.print_summary = print_summary;
3689 print_args.print_formfeed = FALSE;
3690 packet_range_init(&print_args.range, &cfile);
3692 print_args.print_hex = print_hex;
3693 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3695 if (!proto_tree_print(&print_args, edt, print_stream))
3698 if (!print_line(print_stream, 0, separator))
3704 proto_tree_write_pdml(edt, stdout);
3706 return !ferror(stdout);
3708 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3710 return !ferror(stdout);
3714 if (print_summary || print_details) {
3715 if (!print_line(print_stream, 0, ""))
3718 if (!print_hex_data(print_stream, edt))
3720 if (!print_line(print_stream, 0, separator))
3729 switch (output_action) {
3732 return print_finale(print_stream);
3736 write_pdml_finale(stdout);
3738 write_psml_finale(stdout);
3739 return !ferror(stdout);
3742 write_fields_finale(output_fields, stdout);
3743 return !ferror(stdout);
3746 g_assert_not_reached();
3752 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3756 char err_msg[2048+1];
3758 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3762 /* The open succeeded. Fill in the information for this file. */
3764 /* Create new epan session for dissection. */
3765 epan_free(cf->epan);
3766 cf->epan = tshark_epan_new(cf);
3769 cf->f_datalen = 0; /* not used, but set it anyway */
3771 /* Set the file name because we need it to set the follow stream filter.
3772 XXX - is that still true? We need it for other reasons, though,
3774 cf->filename = g_strdup(fname);
3776 /* Indicate whether it's a permanent or temporary file. */
3777 cf->is_tempfile = is_tempfile;
3779 /* No user changes yet. */
3780 cf->unsaved_changes = FALSE;
3782 cf->cd_t = wtap_file_type(cf->wth);
3784 cf->drops_known = FALSE;
3786 cf->snap = wtap_snapshot_length(cf->wth);
3787 if (cf->snap == 0) {
3788 /* Snapshot length not known. */
3789 cf->has_snap = FALSE;
3790 cf->snap = WTAP_MAX_PACKET_SIZE;
3792 cf->has_snap = TRUE;
3793 nstime_set_zero(&cf->elapsed_time);
3798 cf->state = FILE_READ_IN_PROGRESS;
3800 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3801 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3806 g_snprintf(err_msg, sizeof err_msg,
3807 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3808 cmdarg_err("%s", err_msg);
3813 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3815 char *save_file_string;
3817 save_file_string = output_file_description(fname);
3822 cmdarg_err("Not all the packets could be written to the %s because there is "
3823 "no space left on the file system.",
3829 cmdarg_err("Not all the packets could be written to the %s because you are "
3830 "too close to, or over your disk quota.",
3835 case WTAP_ERR_CANT_CLOSE:
3836 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3840 case WTAP_ERR_SHORT_WRITE:
3841 cmdarg_err("Not all the packets could be written to the %s.",
3847 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3848 wtap_strerror(err));
3850 cmdarg_err("An error occurred while writing to the %s: %s.",
3851 save_file_string, wtap_strerror(err));
3855 g_free(save_file_string);
3859 show_print_file_io_error(int err)
3864 cmdarg_err("Not all the packets could be printed because there is "
3865 "no space left on the file system.");
3870 cmdarg_err("Not all the packets could be printed because you are "
3871 "too close to, or over your disk quota.");
3876 cmdarg_err("An error occurred while printing packets: %s.",
3883 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3887 static char errmsg_errno[1024+1];
3890 /* Wiretap error. */
3893 case WTAP_ERR_NOT_REGULAR_FILE:
3894 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3897 case WTAP_ERR_RANDOM_OPEN_PIPE:
3898 /* Seen only when opening a capture file for reading. */
3899 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3902 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3903 /* Seen only when opening a capture file for reading. */
3904 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3907 case WTAP_ERR_UNSUPPORTED:
3908 /* Seen only when opening a capture file for reading. */
3909 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3910 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3913 errmsg = errmsg_errno;
3916 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3917 /* Seen only when opening a capture file for writing. */
3918 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3919 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3920 "written to a pipe.", wtap_file_type_short_string(file_type));
3921 errmsg = errmsg_errno;
3924 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3925 /* Seen only when opening a capture file for writing. */
3926 errmsg = "TShark doesn't support writing capture files in that format.";
3929 case WTAP_ERR_UNSUPPORTED_ENCAP:
3931 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3932 "TShark can't save this capture as a \"%s\" file.",
3933 wtap_file_type_short_string(file_type));
3935 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3936 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3940 errmsg = errmsg_errno;
3943 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3945 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3946 "TShark can't save this capture as a \"%s\" file.",
3947 wtap_file_type_short_string(file_type));
3948 errmsg = errmsg_errno;
3950 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3953 case WTAP_ERR_BAD_FILE:
3954 /* Seen only when opening a capture file for reading. */
3955 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3956 "The file \"%%s\" appears to be damaged or corrupt.\n"
3959 errmsg = errmsg_errno;
3962 case WTAP_ERR_CANT_OPEN:
3964 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3966 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3969 case WTAP_ERR_SHORT_READ:
3970 errmsg = "The file \"%s\" appears to have been cut short"
3971 " in the middle of a packet or other data.";
3974 case WTAP_ERR_SHORT_WRITE:
3975 errmsg = "A full header couldn't be written to the file \"%s\".";
3978 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3979 errmsg = "This file type cannot be written as a compressed file.";
3982 case WTAP_ERR_DECOMPRESS:
3983 /* Seen only when opening a capture file for reading. */
3984 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3985 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3988 errmsg = errmsg_errno;
3992 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3993 "The file \"%%s\" could not be %s: %s.",
3994 for_writing ? "created" : "opened",
3995 wtap_strerror(err));
3996 errmsg = errmsg_errno;
4000 errmsg = file_open_error_message(err, for_writing);
4005 * Open/create errors are reported with an console message in TShark.
4008 open_failure_message(const char *filename, int err, gboolean for_writing)
4010 fprintf(stderr, "tshark: ");
4011 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4012 fprintf(stderr, "\n");
4017 * General errors are reported with an console message in TShark.
4020 failure_message(const char *msg_format, va_list ap)
4022 fprintf(stderr, "tshark: ");
4023 vfprintf(stderr, msg_format, ap);
4024 fprintf(stderr, "\n");
4028 * Read errors are reported with an console message in TShark.
4031 read_failure_message(const char *filename, int err)
4033 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4034 filename, g_strerror(err));
4038 * Write errors are reported with an console message in TShark.
4041 write_failure_message(const char *filename, int err)
4043 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4044 filename, g_strerror(err));
4048 * Report an error in command-line arguments.
4051 cmdarg_err(const char *fmt, ...)
4056 failure_message(fmt, ap);
4061 * Report additional information for an error in command-line arguments.
4064 cmdarg_err_cont(const char *fmt, ...)
4069 vfprintf(stderr, fmt, ap);
4070 fprintf(stderr, "\n");
4076 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4081 * indent-tabs-mode: nil
4084 * vi: set shiftwidth=2 tabstop=8 expandtab:
4085 * :indentSize=2:tabSize=8:noTabs=true: