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");
340 fprintf(output, " --capture-comment <comment>\n");
341 fprintf(output, " add a capture comment to the newly created\n");
342 fprintf(output, " output file (only for pcapng)\n");
344 fprintf(output, "\n");
345 fprintf(output, "Miscellaneous:\n");
346 fprintf(output, " -h display this help and exit\n");
347 fprintf(output, " -v display version info and exit\n");
348 fprintf(output, " -o <name>:<value> ... override preference setting\n");
349 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
350 fprintf(output, " -G [report] dump one of several available reports and exit\n");
351 fprintf(output, " default report=\"fields\"\n");
352 fprintf(output, " use \"-G ?\" for more help\n");
356 glossary_option_help(void)
362 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
364 fprintf(output, "\n");
365 fprintf(output, "Usage: tshark -G [report]\n");
366 fprintf(output, "\n");
367 fprintf(output, "Glossary table reports:\n");
368 fprintf(output, " -G fields dump fields glossary and exit\n");
369 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
370 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
371 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
372 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
373 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
374 fprintf(output, "\n");
375 fprintf(output, "Preference reports:\n");
376 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
377 fprintf(output, " -G currentprefs dump current preferences and exit\n");
378 fprintf(output, "\n");
382 * For a dissector table, print on the stream described by output,
383 * its short name (which is what's used in the "-d" option) and its
387 display_dissector_table_names(const char *table_name, const char *ui_name,
390 if ((prev_display_dissector_name == NULL) ||
391 (strcmp(prev_display_dissector_name, table_name) != 0)) {
392 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
393 prev_display_dissector_name = table_name;
398 * For a dissector handle, print on the stream described by output,
399 * the filter name (which is what's used in the "-d" option) and the full
400 * name for the protocol that corresponds to this handle.
403 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
406 const gchar *proto_filter_name;
407 const gchar *proto_ui_name;
409 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
411 if (proto_id != -1) {
412 proto_filter_name = proto_get_protocol_filter_name(proto_id);
413 proto_ui_name = proto_get_protocol_name(proto_id);
414 g_assert(proto_filter_name != NULL);
415 g_assert(proto_ui_name != NULL);
417 if ((prev_display_dissector_name == NULL) ||
418 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
419 fprintf((FILE *)output, "\t%s (%s)\n",
422 prev_display_dissector_name = proto_filter_name;
428 * The protocol_name_search structure is used by find_protocol_name_func()
429 * to pass parameters and store results
431 struct protocol_name_search{
432 gchar *searched_name; /* Protocol filter name we are looking for */
433 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
434 guint nb_match; /* How many dissectors matched searched_name */
436 typedef struct protocol_name_search *protocol_name_search_t;
439 * This function parses all dissectors associated with a table to find the
440 * one whose protocol has the specified filter name. It is called
441 * as a reference function in a call to dissector_table_foreach_handle.
442 * The name we are looking for, as well as the results, are stored in the
443 * protocol_name_search struct pointed to by user_data.
444 * If called using dissector_table_foreach_handle, we actually parse the
445 * whole list of dissectors.
448 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
452 const gchar *protocol_filter_name;
453 protocol_name_search_t search_info;
457 search_info = (protocol_name_search_t)user_data;
459 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
460 if (proto_id != -1) {
461 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
462 g_assert(protocol_filter_name != NULL);
463 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
465 if (search_info->nb_match == 0) {
466 /* Record this handle only if this is the first match */
467 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
469 search_info->nb_match++;
475 * Allow dissector key names to be sorted alphabetically
479 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
481 return strcmp((const char*)dissector_a, (const char*)dissector_b);
485 * Print all layer type names supported.
486 * We send the output to the stream described by the handle output.
490 fprint_all_layer_types(FILE *output)
493 prev_display_dissector_name = NULL;
494 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
498 * Print all protocol names supported for a specific layer type.
499 * table_name contains the layer type name in which the search is performed.
500 * We send the output to the stream described by the handle output.
504 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
507 prev_display_dissector_name = NULL;
508 dissector_table_foreach_handle(table_name,
509 display_dissector_names,
514 * The function below parses the command-line parameters for the decode as
515 * feature (a string pointer by cl_param).
516 * It checks the format of the command-line, searches for a matching table
517 * and dissector. If a table/dissector match is not found, we display a
518 * summary of the available tables/dissectors (on stderr) and return FALSE.
519 * If everything is fine, we get the "Decode as" preference activated,
520 * then we return TRUE.
523 add_decode_as(const gchar *cl_param)
526 guint32 selector, selector2;
527 gchar *decoded_param;
528 gchar *remaining_param;
530 gchar *dissector_str;
531 dissector_handle_t dissector_matching;
532 dissector_table_t table_matching;
533 ftenum_t dissector_table_selector_type;
534 struct protocol_name_search user_protocol_name;
538 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
541 decoded_param = g_strdup(cl_param);
542 g_assert(decoded_param);
545 /* The lines below will parse this string (modifying it) to extract all
546 necessary information. Note that decoded_param is still needed since
547 strings are not copied - we just save pointers. */
549 /* This section extracts a layer type (table_name) from decoded_param */
550 table_name = decoded_param; /* Layer type string starts from beginning */
552 remaining_param = strchr(table_name, '=');
553 if (remaining_param == NULL) {
554 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
555 /* If the argument does not follow the template, carry on anyway to check
556 if the table name is at least correct. If remaining_param is NULL,
557 we'll exit anyway further down */
560 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
563 /* Remove leading and trailing spaces from the table name */
564 while ( table_name[0] == ' ' )
566 while ( table_name[strlen(table_name) - 1] == ' ' )
567 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
569 /* The following part searches a table matching with the layer type specified */
570 table_matching = NULL;
572 /* Look for the requested table */
573 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
574 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
577 table_matching = find_dissector_table(table_name);
578 if (!table_matching) {
579 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
583 if (!table_matching) {
584 /* Display a list of supported layer types to help the user, if the
585 specified layer type was not found */
586 cmdarg_err("Valid layer types are:");
587 fprint_all_layer_types(stderr);
589 if (remaining_param == NULL || !table_matching) {
590 /* Exit if the layer type was not found, or if no '=' separator was found
592 g_free(decoded_param);
596 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
597 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
600 remaining_param++; /* Move to the second '=' */
601 *remaining_param = '\0'; /* Remove the second '=' */
603 remaining_param++; /* Position after the layer type string */
605 /* This section extracts a selector value (selector_str) from decoded_param */
607 selector_str = remaining_param; /* Next part starts with the selector number */
609 remaining_param = strchr(selector_str, ',');
610 if (remaining_param == NULL) {
611 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
612 /* If the argument does not follow the template, carry on anyway to check
613 if the selector value is at least correct. If remaining_param is NULL,
614 we'll exit anyway further down */
617 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
620 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
622 switch (dissector_table_selector_type) {
628 /* The selector for this table is an unsigned number. Parse it as such.
629 There's no need to remove leading and trailing spaces from the
630 selector number string, because sscanf will do that for us. */
631 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
636 if (op != ':' && op != '-') {
637 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
638 g_free(decoded_param);
642 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
643 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
644 g_free(decoded_param);
648 else if (selector2 < selector) {
649 /* We could swap them for the user, but maybe it's better to call
650 * this out as an error in case it's not what was intended? */
651 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
652 g_free(decoded_param);
657 cmdarg_err("Invalid selector number \"%s\"", selector_str);
658 g_free(decoded_param);
665 /* The selector for this table is a string. */
669 /* There are currently no dissector tables with any types other
670 than the ones listed above. */
671 g_assert_not_reached();
674 if (remaining_param == NULL) {
675 /* Exit if no ',' separator was found (see above) */
676 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
677 fprint_all_protocols_for_layer_types(stderr, table_name);
678 g_free(decoded_param);
682 remaining_param++; /* Position after the selector number string */
684 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
686 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
688 /* Remove leading and trailing spaces from the dissector name */
689 while ( dissector_str[0] == ' ' )
691 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
692 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
694 dissector_matching = NULL;
696 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
697 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 */
698 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
701 user_protocol_name.nb_match = 0;
702 user_protocol_name.searched_name = dissector_str;
703 user_protocol_name.matched_handle = NULL;
705 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 */
707 if (user_protocol_name.nb_match != 0) {
708 dissector_matching = user_protocol_name.matched_handle;
709 if (user_protocol_name.nb_match > 1) {
710 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
714 /* OK, check whether the problem is that there isn't any such
715 protocol, or that there is but it's not specified as a protocol
716 that's valid for that dissector table.
717 Note, we don't exit here, but dissector_matching will remain NULL,
719 if (proto_get_id_by_filter_name(dissector_str) == -1) {
720 /* No such protocol */
721 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
723 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
724 dissector_str, table_name);
729 if (!dissector_matching) {
730 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
731 fprint_all_protocols_for_layer_types(stderr, table_name);
732 g_free(decoded_param);
736 /* This is the end of the code that parses the command-line options.
737 All information is now stored in the variables:
741 The above variables that are strings are still pointing to areas within
742 decoded_parm. decoded_parm thus still needs to be kept allocated in
743 until we stop needing these variables
744 decoded_param will be deallocated at each exit point of this function */
747 /* We now have a pointer to the handle for the requested dissector
748 (requested protocol) inside the variable dissector_matching */
749 switch (dissector_table_selector_type) {
755 /* The selector for this table is an unsigned number. */
757 dissector_change_uint(table_name, selector, dissector_matching);
758 } else if (op == ':') {
759 for (i = selector; i < (guint64)selector + selector2; i++) {
760 dissector_change_uint(table_name, (guint32)i, dissector_matching);
762 } else { /* op == '-' */
763 for (i = selector; i <= selector2; i++) {
764 dissector_change_uint(table_name, (guint32)i, dissector_matching);
771 /* The selector for this table is a string. */
772 dissector_change_string(table_name, selector_str, dissector_matching);
776 /* There are currently no dissector tables with any types other
777 than the ones listed above. */
778 g_assert_not_reached();
780 g_free(decoded_param); /* "Decode As" rule has been successfully added */
785 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
786 const gchar *message, gpointer user_data)
788 /* ignore log message, if log_level isn't interesting based
789 upon the console log preferences.
790 If the preferences haven't been loaded loaded yet, display the
793 The default console_log_level preference value is such that only
794 ERROR, CRITICAL and WARNING level messages are processed;
795 MESSAGE, INFO and DEBUG level messages are ignored.
797 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
798 ERROR and CRITICAL level messages so the current code is a behavioral
799 change. The current behavior is the same as in Wireshark.
801 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
802 prefs.console_log_level != 0) {
806 g_log_default_handler(log_domain, log_level, message, user_data);
811 output_file_description(const char *fname)
813 char *save_file_string;
815 /* Get a string that describes what we're writing to */
816 if (strcmp(fname, "-") == 0) {
817 /* We're writing to the standard output */
818 save_file_string = g_strdup("standard output");
820 /* We're writing to a file with the name in save_file */
821 save_file_string = g_strdup_printf("file \"%s\"", fname);
823 return save_file_string;
827 print_current_user(void) {
828 gchar *cur_user, *cur_group;
830 if (started_with_special_privs()) {
831 cur_user = get_cur_username();
832 cur_group = get_cur_groupname();
833 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
834 cur_user, cur_group);
837 if (running_with_special_privs()) {
838 fprintf(stderr, " This could be dangerous.");
840 fprintf(stderr, "\n");
845 check_capture_privs(void) {
848 /* Warn the user if npf.sys isn't loaded. */
849 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
850 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
851 "capturing or\nlisting interfaces.\n");
857 show_version(GString *comp_info_str, GString *runtime_info_str)
859 printf("TShark " VERSION "%s\n"
866 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
867 runtime_info_str->str);
871 main(int argc, char *argv[])
873 GString *comp_info_str;
874 GString *runtime_info_str;
875 char *init_progfile_dir_error;
877 struct option long_options[] = {
878 {"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
881 gboolean arg_error = FALSE;
887 char *gpf_path, *pf_path;
888 char *gdp_path, *dp_path;
889 int gpf_open_errno, gpf_read_errno;
890 int pf_open_errno, pf_read_errno;
891 int gdp_open_errno, gdp_read_errno;
892 int dp_open_errno, dp_read_errno;
894 volatile int exit_status = 0;
896 gboolean list_link_layer_types = FALSE;
897 gboolean start_capture = FALSE;
902 gboolean capture_option_specified = FALSE;
904 gboolean quiet = FALSE;
905 #ifdef PCAP_NG_DEFAULT
906 volatile int out_file_type = WTAP_FILE_PCAPNG;
908 volatile int out_file_type = WTAP_FILE_PCAP;
910 volatile gboolean out_file_name_res = FALSE;
911 gchar *volatile cf_name = NULL;
912 gchar *rfilter = NULL;
913 gchar *dfilter = NULL;
914 #ifdef HAVE_PCAP_OPEN_DEAD
915 struct bpf_program fcode;
917 dfilter_t *rfcode = NULL;
918 dfilter_t *dfcode = NULL;
923 gchar *output_only = NULL;
925 #ifdef HAVE_PCAP_REMOTE
926 #define OPTSTRING_A "A:"
928 #define OPTSTRING_A ""
931 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
932 #define OPTSTRING_B "B:"
934 #define OPTSTRING_B ""
935 #endif /* _WIN32 or HAVE_PCAP_CREATE */
936 #else /* HAVE_LIBPCAP */
937 #define OPTSTRING_B ""
938 #endif /* HAVE_LIBPCAP */
940 #ifdef HAVE_PCAP_CREATE
941 #define OPTSTRING_I "I"
943 #define OPTSTRING_I ""
946 /* the leading - ensures that getopt() does not permute the argv[] entries
947 we have to make sure that the first getopt() preserves the content of argv[]
948 for the subsequent getopt_long() call */
949 #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:"
951 static const char optstring[] = OPTSTRING;
953 /* Assemble the compile-time version information string */
954 comp_info_str = g_string_new("Compiled ");
955 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
957 /* Assemble the run-time version information string */
958 runtime_info_str = g_string_new("Running ");
959 get_runtime_version_info(runtime_info_str, NULL);
961 /* Add it to the information to be reported on a crash. */
962 ws_add_crash_info("TShark " VERSION "%s\n"
967 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
970 arg_list_utf_16to8(argc, argv);
971 create_app_running_mutex();
972 #if !GLIB_CHECK_VERSION(2,31,0)
978 * Get credential information for later use.
980 init_process_policies();
983 * Attempt to get the pathname of the executable file.
985 init_progfile_dir_error = init_progfile_dir(argv[0], main);
986 if (init_progfile_dir_error != NULL) {
987 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
988 init_progfile_dir_error);
992 * In order to have the -X opts assigned before the wslua machine starts
993 * we need to call getopts before epan_init() gets called.
996 optind_initial = optind;
998 while ((opt = getopt(argc, argv, optstring)) != -1) {
1000 case 'C': /* Configuration Profile */
1001 if (profile_exists (optarg, FALSE)) {
1002 set_profile_name (optarg);
1004 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1008 case 'P': /* Print packet summary info even when writing to a file */
1009 print_packet_info = TRUE;
1010 print_summary = TRUE;
1012 case 'O': /* Only output these protocols */
1013 output_only = g_strdup(optarg);
1015 case 'V': /* Verbose */
1016 print_details = TRUE;
1017 print_packet_info = TRUE;
1019 case 'x': /* Print packet data in hex (and ASCII) */
1021 /* The user asked for hex output, so let's ensure they get it,
1022 * even if they're writing to a file.
1024 print_packet_info = TRUE;
1035 * Print packet summary information is the default, unless either -V or -x
1036 * were specified and -P was not. Note that this is new behavior, which
1037 * allows for the possibility of printing only hex/ascii output without
1038 * necessarily requiring that either the summary or details be printed too.
1040 if (print_summary == -1)
1041 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1043 optind = optind_initial;
1048 /** Send All g_log messages to our own handler **/
1052 G_LOG_LEVEL_CRITICAL|
1053 G_LOG_LEVEL_WARNING|
1054 G_LOG_LEVEL_MESSAGE|
1057 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1059 g_log_set_handler(NULL,
1060 (GLogLevelFlags)log_flags,
1061 tshark_log_handler, NULL /* user_data */);
1062 g_log_set_handler(LOG_DOMAIN_MAIN,
1063 (GLogLevelFlags)log_flags,
1064 tshark_log_handler, NULL /* user_data */);
1067 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1068 (GLogLevelFlags)log_flags,
1069 tshark_log_handler, NULL /* user_data */);
1070 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1071 (GLogLevelFlags)log_flags,
1072 tshark_log_handler, NULL /* user_data */);
1075 initialize_funnel_ops();
1078 capture_opts_init(&global_capture_opts);
1079 capture_session_init(&global_capture_session, (void *)&cfile);
1082 timestamp_set_type(TS_RELATIVE);
1083 timestamp_set_precision(TS_PREC_AUTO);
1084 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1086 /* Register all dissectors; we must do this before checking for the
1087 "-G" flag, as the "-G" flag dumps information registered by the
1088 dissectors, and we must do it before we read the preferences, in
1089 case any dissectors register preferences. */
1090 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1091 failure_message, open_failure_message, read_failure_message,
1092 write_failure_message);
1094 /* Register all tap listeners; we do this before we parse the arguments,
1095 as the "-z" argument can specify a registered tap. */
1097 /* we register the plugin taps before the other taps because
1098 stats_tree taps plugins will be registered as tap listeners
1099 by stats_tree_stat.c and need to registered before that */
1101 register_all_plugin_tap_listeners();
1103 register_all_tap_listeners();
1105 /* If invoked with the "-G" flag, we dump out information based on
1106 the argument to the "-G" flag; if no argument is specified,
1107 for backwards compatibility we dump out a glossary of display
1110 XXX - we do this here, for now, to support "-G" with no arguments.
1111 If none of our build or other processes uses "-G" with no arguments,
1112 we can just process it with the other arguments. */
1113 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1114 proto_initialize_all_prefixes();
1117 proto_registrar_dump_fields();
1119 if (strcmp(argv[2], "fields") == 0)
1120 proto_registrar_dump_fields();
1121 else if (strcmp(argv[2], "protocols") == 0)
1122 proto_registrar_dump_protocols();
1123 else if (strcmp(argv[2], "values") == 0)
1124 proto_registrar_dump_values();
1125 else if (strcmp(argv[2], "ftypes") == 0)
1126 proto_registrar_dump_ftypes();
1127 else if (strcmp(argv[2], "decodes") == 0)
1128 dissector_dump_decodes();
1129 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1130 dissector_dump_heur_decodes();
1131 else if (strcmp(argv[2], "defaultprefs") == 0)
1133 else if (strcmp(argv[2], "plugins") == 0)
1135 else if (strcmp(argv[2], "?") == 0)
1136 glossary_option_help();
1137 else if (strcmp(argv[2], "-?") == 0)
1138 glossary_option_help();
1139 else if (strcmp(argv[2], "currentprefs") == 0) {
1140 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1141 &pf_open_errno, &pf_read_errno, &pf_path);
1144 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1151 /* Set the C-language locale to the native environment. */
1152 setlocale(LC_ALL, "");
1154 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1155 &pf_open_errno, &pf_read_errno, &pf_path);
1156 if (gpf_path != NULL) {
1157 if (gpf_open_errno != 0) {
1158 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1159 pf_path, g_strerror(gpf_open_errno));
1161 if (gpf_read_errno != 0) {
1162 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1163 pf_path, g_strerror(gpf_read_errno));
1166 if (pf_path != NULL) {
1167 if (pf_open_errno != 0) {
1168 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1169 g_strerror(pf_open_errno));
1171 if (pf_read_errno != 0) {
1172 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1173 pf_path, g_strerror(pf_read_errno));
1179 /* Read the disabled protocols file. */
1180 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1181 &dp_path, &dp_open_errno, &dp_read_errno);
1182 if (gdp_path != NULL) {
1183 if (gdp_open_errno != 0) {
1184 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1185 gdp_path, g_strerror(gdp_open_errno));
1187 if (gdp_read_errno != 0) {
1188 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1189 gdp_path, g_strerror(gdp_read_errno));
1193 if (dp_path != NULL) {
1194 if (dp_open_errno != 0) {
1196 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1197 g_strerror(dp_open_errno));
1199 if (dp_read_errno != 0) {
1201 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1202 g_strerror(dp_read_errno));
1207 check_capture_privs();
1209 cap_file_init(&cfile);
1211 /* Print format defaults to this. */
1212 print_format = PR_FMT_TEXT;
1214 output_fields = output_fields_new();
1216 /* Now get our args */
1217 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1219 case '2': /* Perform two pass analysis */
1220 perform_two_pass_analysis = TRUE;
1222 case 'a': /* autostop criteria */
1223 case 'b': /* Ringbuffer option */
1224 case 'c': /* Capture x packets */
1225 case 'f': /* capture filter */
1226 case 'g': /* enable group read access on file(s) */
1227 case 'i': /* Use interface x */
1228 case 'p': /* Don't capture in promiscuous mode */
1229 #ifdef HAVE_PCAP_REMOTE
1230 case 'A': /* Authentication */
1232 #ifdef HAVE_PCAP_CREATE
1233 case 'I': /* Capture in monitor mode, if available */
1235 case 's': /* Set the snapshot (capture) length */
1236 case 'w': /* Write to capture file x */
1237 case 'y': /* Set the pcap data link type */
1238 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1239 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1240 case 'B': /* Buffer size */
1241 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1243 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1248 capture_option_specified = TRUE;
1253 /* Configuration profile settings were already processed just ignore them this time*/
1255 case 'd': /* Decode as rule */
1256 if (!add_decode_as(optarg))
1259 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1260 case 'K': /* Kerberos keytab file */
1261 read_keytab_file(optarg);
1264 case 'D': /* Print a list of capture devices and exit */
1266 if_list = capture_interface_list(&err, &err_str,NULL);
1267 if (if_list == NULL) {
1269 case CANT_GET_INTERFACE_LIST:
1270 case DONT_HAVE_PCAP:
1271 cmdarg_err("%s", err_str);
1275 case NO_INTERFACES_FOUND:
1276 cmdarg_err("There are no interfaces on which a capture can be done");
1281 capture_opts_print_interfaces(if_list);
1282 free_interface_list(if_list);
1285 capture_option_specified = TRUE;
1291 output_fields_add(output_fields, optarg);
1295 if (!output_fields_set_option(output_fields, optarg)) {
1296 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1297 output_fields_list_options(stderr);
1302 out_file_type = wtap_short_string_to_file_type(optarg);
1303 if (out_file_type < 0) {
1304 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1305 list_capture_types();
1309 case 'W': /* Select extra information to save in our capture file */
1310 /* This is patterned after the -N flag which may not be the best idea. */
1311 if (strchr(optarg, 'n')) {
1312 out_file_name_res = TRUE;
1314 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1318 case 'H': /* Read address to name mappings from a hosts file */
1319 if (! add_hosts_file(optarg))
1321 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1324 out_file_name_res = TRUE;
1327 case 'h': /* Print help and exit */
1331 case 'l': /* "Line-buffer" standard output */
1332 /* This isn't line-buffering, strictly speaking, it's just
1333 flushing the standard output after the information for
1334 each packet is printed; however, that should be good
1335 enough for all the purposes to which "-l" is put (and
1336 is probably actually better for "-V", as it does fewer
1339 See the comment in "process_packet()" for an explanation of
1340 why we do that, and why we don't just use "setvbuf()" to
1341 make the standard output line-buffered (short version: in
1342 Windows, "line-buffered" is the same as "fully-buffered",
1343 and the output buffer is only flushed when it fills up). */
1344 line_buffered = TRUE;
1346 case 'L': /* Print list of link-layer types and exit */
1348 list_link_layer_types = TRUE;
1350 capture_option_specified = TRUE;
1354 case 'n': /* No name resolution */
1355 gbl_resolv_flags.mac_name = FALSE;
1356 gbl_resolv_flags.network_name = FALSE;
1357 gbl_resolv_flags.transport_name = FALSE;
1358 gbl_resolv_flags.concurrent_dns = FALSE;
1360 case 'N': /* Select what types of addresses/port #s to resolve */
1361 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1362 if (badopt != '\0') {
1363 cmdarg_err("-N specifies unknown resolving option '%c';",
1365 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1369 case 'o': /* Override preference from command line */
1370 switch (prefs_set_pref(optarg)) {
1375 case PREFS_SET_SYNTAX_ERR:
1376 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1380 case PREFS_SET_NO_SUCH_PREF:
1381 case PREFS_SET_OBSOLETE:
1382 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1387 case 'q': /* Quiet */
1390 case 'Q': /* Really quiet */
1392 really_quiet = TRUE;
1394 case 'r': /* Read capture file x */
1395 cf_name = g_strdup(optarg);
1397 case 'R': /* Read file filter */
1401 /* already processed; just ignore it now */
1403 case 'S': /* Set the line Separator to be printed between packets */
1404 separator = strdup(optarg);
1406 case 't': /* Time stamp type */
1407 if (strcmp(optarg, "r") == 0)
1408 timestamp_set_type(TS_RELATIVE);
1409 else if (strcmp(optarg, "a") == 0)
1410 timestamp_set_type(TS_ABSOLUTE);
1411 else if (strcmp(optarg, "ad") == 0)
1412 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1413 else if (strcmp(optarg, "d") == 0)
1414 timestamp_set_type(TS_DELTA);
1415 else if (strcmp(optarg, "dd") == 0)
1416 timestamp_set_type(TS_DELTA_DIS);
1417 else if (strcmp(optarg, "e") == 0)
1418 timestamp_set_type(TS_EPOCH);
1419 else if (strcmp(optarg, "u") == 0)
1420 timestamp_set_type(TS_UTC);
1421 else if (strcmp(optarg, "ud") == 0)
1422 timestamp_set_type(TS_UTC_WITH_DATE);
1424 cmdarg_err("Invalid time stamp type \"%s\"",
1426 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1427 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1428 cmdarg_err_cont("or \"ud\" for UTC with date.");
1432 case 'T': /* printing Type */
1433 if (strcmp(optarg, "text") == 0) {
1434 output_action = WRITE_TEXT;
1435 print_format = PR_FMT_TEXT;
1436 } else if (strcmp(optarg, "ps") == 0) {
1437 output_action = WRITE_TEXT;
1438 print_format = PR_FMT_PS;
1439 } else if (strcmp(optarg, "pdml") == 0) {
1440 output_action = WRITE_XML;
1441 print_details = TRUE; /* Need details */
1442 print_summary = FALSE; /* Don't allow summary */
1443 } else if (strcmp(optarg, "psml") == 0) {
1444 output_action = WRITE_XML;
1445 print_details = FALSE; /* Don't allow details */
1446 print_summary = TRUE; /* Need summary */
1447 } else if (strcmp(optarg, "fields") == 0) {
1448 output_action = WRITE_FIELDS;
1449 print_details = TRUE; /* Need full tree info */
1450 print_summary = FALSE; /* Don't allow summary */
1452 cmdarg_err("Invalid -T parameter.");
1453 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1457 case 'u': /* Seconds type */
1458 if (strcmp(optarg, "s") == 0)
1459 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1460 else if (strcmp(optarg, "hms") == 0)
1461 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1463 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1464 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1468 case 'v': /* Show version and exit */
1470 show_version(comp_info_str, runtime_info_str);
1471 g_string_free(comp_info_str, TRUE);
1472 g_string_free(runtime_info_str, TRUE);
1473 /* We don't really have to cleanup here, but it's a convenient way to test
1474 * start-up and shut-down of the epan library without any UI-specific
1475 * cruft getting in the way. Makes the results of running
1476 * $ ./tools/valgrind-wireshark -n
1477 * much more useful. */
1481 case 'O': /* Only output these protocols */
1482 /* already processed; just ignore it now */
1484 case 'V': /* Verbose */
1485 /* already processed; just ignore it now */
1487 case 'x': /* Print packet data in hex (and ASCII) */
1488 /* already processed; just ignore it now */
1496 /* We won't call the init function for the stat this soon
1497 as it would disallow MATE's fields (which are registered
1498 by the preferences set callback) from being used as
1499 part of a tap filter. Instead, we just add the argument
1500 to a list of stat arguments. */
1501 if (!process_stat_cmd_arg(optarg)) {
1502 if (strcmp("help", optarg)==0) {
1503 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1504 list_stat_cmd_args();
1507 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1508 cmdarg_err_cont(" -z argument must be one of :");
1509 list_stat_cmd_args();
1514 case '?': /* Bad flag - print usage message */
1517 list_capture_types();
1527 /* If we specified output fields, but not the output field type... */
1528 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1529 cmdarg_err("Output fields were specified with \"-e\", "
1530 "but \"-Tfields\" was not specified.");
1532 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1533 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1534 "specified with \"-e\".");
1539 /* If no capture filter or display filter has been specified, and there are
1540 still command-line arguments, treat them as the tokens of a capture
1541 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1542 flag was specified. */
1543 if (optind < argc) {
1544 if (cf_name != NULL) {
1545 if (dfilter != NULL) {
1546 cmdarg_err("Display filters were specified both with \"-d\" "
1547 "and with additional command-line arguments.");
1550 dfilter = get_args_as_string(argc, argv, optind);
1555 if (global_capture_opts.default_options.cfilter) {
1556 cmdarg_err("A default capture filter was specified both with \"-f\""
1557 " and with additional command-line arguments.");
1560 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1561 interface_options interface_opts;
1562 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1563 if (interface_opts.cfilter == NULL) {
1564 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1565 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1566 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1568 cmdarg_err("A capture filter was specified both with \"-f\""
1569 " and with additional command-line arguments.");
1573 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1575 capture_option_specified = TRUE;
1581 if (!global_capture_opts.saving_to_file) {
1582 /* We're not saving the capture to a file; if "-q" wasn't specified,
1583 we should print packet information */
1585 print_packet_info = TRUE;
1587 /* We're saving to a file; if we're writing to the standard output.
1588 and we'll also be writing dissected packets to the standard
1589 output, reject the request. At best, we could redirect that
1590 to the standard error; we *can't* write both to the standard
1591 output and have either of them be useful. */
1592 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1593 cmdarg_err("You can't write both raw packet data and dissected packets"
1594 " to the standard output.");
1599 /* We're not saving the capture to a file; if "-q" wasn't specified,
1600 we should print packet information */
1602 print_packet_info = TRUE;
1605 #ifndef HAVE_LIBPCAP
1606 if (capture_option_specified)
1607 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1615 if (output_action != WRITE_TEXT) {
1616 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1621 if (output_only != NULL) {
1624 if (!print_details) {
1625 cmdarg_err("-O requires -V");
1629 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1630 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1631 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1635 if (rfilter != NULL && !perform_two_pass_analysis) {
1636 /* Just a warning, so we don't return */
1637 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1641 if (list_link_layer_types) {
1642 /* We're supposed to list the link-layer types for an interface;
1643 did the user also specify a capture file to be read? */
1645 /* Yes - that's bogus. */
1646 cmdarg_err("You can't specify -L and a capture file to be read.");
1649 /* No - did they specify a ring buffer option? */
1650 if (global_capture_opts.multi_files_on) {
1651 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1657 * "-r" was specified, so we're reading a capture file.
1658 * Capture options don't apply here.
1661 /* We don't support capture filters when reading from a capture file
1662 (the BPF compiler doesn't support all link-layer types that we
1663 support in capture files we read). */
1664 if (global_capture_opts.default_options.cfilter) {
1665 cmdarg_err("Only read filters, not capture filters, "
1666 "can be specified when reading a capture file.");
1669 if (global_capture_opts.multi_files_on) {
1670 cmdarg_err("Multiple capture files requested, but "
1671 "a capture isn't being done.");
1674 if (global_capture_opts.has_file_duration) {
1675 cmdarg_err("Switching capture files after a time interval was specified, but "
1676 "a capture isn't being done.");
1679 if (global_capture_opts.has_ring_num_files) {
1680 cmdarg_err("A ring buffer of capture files was specified, but "
1681 "a capture isn't being done.");
1684 if (global_capture_opts.has_autostop_files) {
1685 cmdarg_err("A maximum number of capture files was specified, but "
1686 "a capture isn't being done.");
1690 /* Note: TShark now allows the restriction of a _read_ file by packet count
1691 * and byte count as well as a write file. Other autostop options remain valid
1692 * only for a write file.
1694 if (global_capture_opts.has_autostop_duration) {
1695 cmdarg_err("A maximum capture time was specified, but "
1696 "a capture isn't being done.");
1701 * "-r" wasn't specified, so we're doing a live capture.
1703 if (global_capture_opts.saving_to_file) {
1704 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1706 /* When capturing, we only support writing pcap or pcap-ng format. */
1707 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1708 cmdarg_err("Live captures can only be saved in libpcap format.");
1711 if (global_capture_opts.multi_files_on) {
1712 /* Multiple-file mode doesn't work under certain conditions:
1713 a) it doesn't work if you're writing to the standard output;
1714 b) it doesn't work if you're writing to a pipe;
1716 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1717 cmdarg_err("Multiple capture files requested, but "
1718 "the capture is being written to the standard output.");
1721 if (global_capture_opts.output_to_pipe) {
1722 cmdarg_err("Multiple capture files requested, but "
1723 "the capture file is a pipe.");
1726 if (!global_capture_opts.has_autostop_filesize &&
1727 !global_capture_opts.has_file_duration) {
1728 cmdarg_err("Multiple capture files requested, but "
1729 "no maximum capture file size or duration was specified.");
1733 /* Currently, we don't support read or display filters when capturing
1734 and saving the packets. */
1735 if (rfilter != NULL) {
1736 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1739 if (dfilter != NULL) {
1740 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1744 /* They didn't specify a "-w" flag, so we won't be saving to a
1745 capture file. Check for options that only make sense if
1746 we're saving to a file. */
1747 if (global_capture_opts.has_autostop_filesize) {
1748 cmdarg_err("Maximum capture file size specified, but "
1749 "capture isn't being saved to a file.");
1752 if (global_capture_opts.multi_files_on) {
1753 cmdarg_err("Multiple capture files requested, but "
1754 "the capture isn't being saved to a file.");
1763 /* Start windows sockets */
1764 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1767 /* Notify all registered modules that have had any of their preferences
1768 changed either from one of the preferences file or from the command
1769 line that their preferences have changed. */
1772 /* At this point MATE will have registered its field array so we can
1773 have a tap filter with one of MATE's late-registered fields as part
1774 of the filter. We can now process all the "-z" arguments. */
1775 start_requested_stats();
1778 /* We currently don't support taps, or printing dissected packets,
1779 if we're writing to a pipe. */
1780 if (global_capture_opts.saving_to_file &&
1781 global_capture_opts.output_to_pipe) {
1782 if (tap_listeners_require_dissection()) {
1783 cmdarg_err("Taps aren't supported when saving to a pipe.");
1786 if (print_packet_info) {
1787 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1793 /* disabled protocols as per configuration file */
1794 if (gdp_path == NULL && dp_path == NULL) {
1795 set_disabled_protos_list();
1798 /* Build the column format array */
1799 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1802 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1803 capture_opts_trim_ring_num_files(&global_capture_opts);
1806 if (rfilter != NULL) {
1807 if (!dfilter_compile(rfilter, &rfcode)) {
1808 cmdarg_err("%s", dfilter_error_msg);
1810 #ifdef HAVE_PCAP_OPEN_DEAD
1814 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1816 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1818 " Note: That read filter code looks like a valid capture filter;");
1820 " maybe you mixed them up?");
1829 cfile.rfcode = rfcode;
1831 if (dfilter != NULL) {
1832 if (!dfilter_compile(dfilter, &dfcode)) {
1833 cmdarg_err("%s", dfilter_error_msg);
1835 #ifdef HAVE_PCAP_OPEN_DEAD
1839 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1841 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1843 " Note: That display filter code looks like a valid capture filter;");
1845 " maybe you mixed them up?");
1854 cfile.dfcode = dfcode;
1856 if (print_packet_info) {
1857 /* If we're printing as text or PostScript, we have
1858 to create a print stream. */
1859 if (output_action == WRITE_TEXT) {
1860 switch (print_format) {
1863 print_stream = print_stream_text_stdio_new(stdout);
1867 print_stream = print_stream_ps_stdio_new(stdout);
1871 g_assert_not_reached();
1876 /* We have to dissect each packet if:
1878 we're printing information about each packet;
1880 we're using a read filter on the packets;
1882 we're using a display filter on the packets;
1884 we're using any taps that need dissection. */
1885 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1889 * We're reading a capture file.
1893 * Immediately relinquish any special privileges we have; we must not
1894 * be allowed to read any capture files the user running TShark
1897 relinquish_special_privs_perm();
1898 print_current_user();
1900 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1905 /* Set timestamp precision; there should arguably be a command-line
1906 option to let the user set this. */
1907 switch(wtap_file_tsprecision(cfile.wth)) {
1908 case(WTAP_FILE_TSPREC_SEC):
1909 timestamp_set_precision(TS_PREC_AUTO_SEC);
1911 case(WTAP_FILE_TSPREC_DSEC):
1912 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1914 case(WTAP_FILE_TSPREC_CSEC):
1915 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1917 case(WTAP_FILE_TSPREC_MSEC):
1918 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1920 case(WTAP_FILE_TSPREC_USEC):
1921 timestamp_set_precision(TS_PREC_AUTO_USEC);
1923 case(WTAP_FILE_TSPREC_NSEC):
1924 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1927 g_assert_not_reached();
1930 /* Process the packets in the file */
1933 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1934 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1935 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1937 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1940 CATCH(OutOfMemoryError) {
1944 "Sorry, but TShark has to terminate now!\n"
1946 "Some infos / workarounds can be found at:\n"
1947 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1952 /* We still dump out the results of taps, etc., as we might have
1953 read some packets; however, we exit with an error status. */
1957 /* No capture file specified, so we're supposed to do a live capture
1958 or get a list of link-layer types for a live capture device;
1959 do we have support for live captures? */
1961 /* if no interface was specified, pick a default */
1962 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1963 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1964 if (exit_status != 0)
1967 /* if requested, list the link layer types and exit */
1968 if (list_link_layer_types) {
1971 /* Get the list of link-layer types for the capture devices. */
1972 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1973 interface_options interface_opts;
1974 if_capabilities_t *caps;
1976 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1977 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1979 cmdarg_err("%s", err_str);
1983 if (caps->data_link_types == NULL) {
1984 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1987 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1988 free_if_capabilities(caps);
1993 if (print_packet_info) {
1994 if (!write_preamble(NULL)) {
1995 show_print_file_io_error(errno);
1998 } else if (!quiet) {
2000 * We're not printing information for each packet, and the user
2001 * didn't ask us not to print a count of packets as they arrive,
2002 * so print that count so the user knows that packets are arriving.
2004 * XXX - what if the user wants to do a live capture, doesn't want
2005 * to save it to a file, doesn't want information printed for each
2006 * packet, does want some "-z" statistic, and wants packet counts
2007 * so they know whether they're seeing any packets?
2009 print_packet_counts = TRUE;
2012 /* For now, assume libpcap gives microsecond precision. */
2013 timestamp_set_precision(TS_PREC_AUTO_USEC);
2016 * XXX - this returns FALSE if an error occurred, but it also
2017 * returns FALSE if the capture stops because a time limit
2018 * was reached (and possibly other limits), so we can't assume
2019 * it means an error.
2021 * The capture code is a bit twisty, so it doesn't appear to
2022 * be an easy fix. We just ignore the return value for now.
2023 * Instead, pass on the exit status from the capture child.
2026 exit_status = global_capture_session.fork_child_status;
2028 if (print_packet_info) {
2029 if (!write_finale()) {
2031 show_print_file_io_error(err);
2035 /* No - complain. */
2036 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2043 if (cfile.frames != NULL) {
2044 free_frame_data_sequence(cfile.frames);
2045 cfile.frames = NULL;
2048 draw_tap_listeners(TRUE);
2049 funnel_dump_all_text_windows();
2052 output_fields_free(output_fields);
2053 output_fields = NULL;
2058 /*#define USE_BROKEN_G_MAIN_LOOP*/
2060 #ifdef USE_BROKEN_G_MAIN_LOOP
2063 gboolean loop_running = FALSE;
2065 guint32 packet_count = 0;
2068 /* XXX - move to the right position / file */
2069 /* read from a pipe (callback) */
2070 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2072 typedef struct pipe_input_tag {
2076 pipe_input_cb_t input_cb;
2077 guint pipe_input_id;
2079 GMutex *callback_running;
2083 static pipe_input_t pipe_input;
2086 /* The timer has expired, see if there's stuff to read from the pipe,
2087 if so, do the callback */
2089 pipe_timer_cb(gpointer data)
2095 pipe_input_t *pipe_input_p = data;
2096 gint iterations = 0;
2098 g_mutex_lock (pipe_input_p->callback_running);
2100 /* try to read data from the pipe only 5 times, to avoid blocking */
2101 while(iterations < 5) {
2102 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2104 /* Oddly enough although Named pipes don't work on win9x,
2105 PeekNamedPipe does !!! */
2106 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2107 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2109 /* Get the child process exit status */
2110 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2113 /* If the Peek returned an error, or there are bytes to be read
2114 or the childwatcher thread has terminated then call the normal
2116 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2118 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2120 /* And call the real handler */
2121 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2122 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2123 /* pipe closed, return false so that the timer is stopped */
2124 g_mutex_unlock (pipe_input_p->callback_running);
2129 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2130 /* No data, stop now */
2137 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2139 g_mutex_unlock (pipe_input_p->callback_running);
2141 /* we didn't stopped the timer, so let it run */
2148 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2151 pipe_input.source = source;
2152 pipe_input.child_process = child_process;
2153 pipe_input.user_data = user_data;
2154 pipe_input.input_cb = input_cb;
2157 #if GLIB_CHECK_VERSION(2,31,0)
2158 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2159 g_mutex_init(pipe_input.callback_running);
2161 pipe_input.callback_running = g_mutex_new();
2163 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2164 do this but that doesn't cover all win32 platforms. GTK can do
2165 this but doesn't seem to work over processes. Attempt to do
2166 something similar here, start a timer and check for data on every
2168 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2169 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2173 static const nstime_t *
2174 tshark_get_frame_ts(void *data, guint32 frame_num)
2176 capture_file *cf = (capture_file *) data;
2178 if (ref && ref->num == frame_num)
2179 return &ref->abs_ts;
2181 if (prev_dis && prev_dis->num == frame_num)
2182 return &prev_dis->abs_ts;
2184 if (prev_cap && prev_cap->num == frame_num)
2185 return &prev_cap->abs_ts;
2188 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2190 return (fd) ? &fd->abs_ts : NULL;
2197 tshark_epan_new(capture_file *cf)
2199 epan_t *epan = epan_new();
2202 epan->get_frame_ts = tshark_get_frame_ts;
2203 epan->get_interface_name = cap_file_get_interface_name;
2204 epan->get_user_comment = NULL;
2215 GString *str = g_string_new("");
2216 #ifdef USE_TSHARK_SELECT
2220 struct sigaction action, oldaction;
2224 * XXX - dropping privileges is still required, until code cleanup is done
2226 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2227 * when it's done, we don't need special privileges to run tshark at all,
2228 * therefore we don't need to drop these privileges
2229 * The only thing we might want to keep is a warning if tshark is run as root,
2230 * as it's no longer necessary and potentially dangerous.
2232 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2233 * We've opened the capture device, so we shouldn't need any special
2234 * privileges any more; relinquish those privileges.
2236 * XXX - if we have saved set-user-ID support, we should give up those
2237 * privileges immediately, and then reclaim them long enough to get
2238 * a list of network interfaces and to open one, and then give them
2239 * up again, so that stuff we do while processing the argument list,
2240 * reading the user's preferences, loading and starting plugins
2241 * (especially *user* plugins), etc. is done with the user's privileges,
2242 * not special privileges.
2244 relinquish_special_privs_perm();
2245 print_current_user();
2247 /* Create new dissection section. */
2248 epan_free(cfile.epan);
2249 cfile.epan = tshark_epan_new(&cfile);
2252 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2253 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2255 /* Catch SIGINT and SIGTERM and, if we get either of them,
2256 clean up and exit. If SIGHUP isn't being ignored, catch
2257 it too and, if we get it, clean up and exit.
2259 We restart any read that was in progress, so that it doesn't
2260 disrupt reading from the sync pipe. The signal handler tells
2261 the capture child to finish; it will report that it finished,
2262 or will exit abnormally, so we'll stop reading from the sync
2263 pipe, pick up the exit status, and quit. */
2264 memset(&action, 0, sizeof(action));
2265 action.sa_handler = capture_cleanup;
2266 action.sa_flags = SA_RESTART;
2267 sigemptyset(&action.sa_mask);
2268 sigaction(SIGTERM, &action, NULL);
2269 sigaction(SIGINT, &action, NULL);
2270 sigaction(SIGHUP, NULL, &oldaction);
2271 if (oldaction.sa_handler == SIG_DFL)
2272 sigaction(SIGHUP, &action, NULL);
2275 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2276 quiet mode, report the number of packets we've captured.
2278 Again, restart any read that was in progress, so that it doesn't
2279 disrupt reading from the sync pipe. */
2280 action.sa_handler = report_counts_siginfo;
2281 action.sa_flags = SA_RESTART;
2282 sigemptyset(&action.sa_mask);
2283 sigaction(SIGINFO, &action, NULL);
2284 #endif /* SIGINFO */
2287 global_capture_session.state = CAPTURE_PREPARING;
2289 /* Let the user know which interfaces were chosen. */
2290 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2291 interface_options interface_opts;
2293 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2294 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2295 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2296 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2299 if (global_capture_opts.ifaces->len < 2) {
2301 if (global_capture_opts.ifaces->len < 4) {
2303 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2304 interface_options interface_opts;
2306 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2308 if (global_capture_opts.ifaces->len > 2) {
2309 g_string_append_printf(str, ",");
2311 g_string_append_printf(str, " ");
2312 if (i == global_capture_opts.ifaces->len - 1) {
2313 g_string_append_printf(str, "and ");
2316 g_string_append_printf(str, "'%s'", interface_opts.descr);
2319 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2321 if (really_quiet == FALSE)
2322 fprintf(stderr, "Capturing on %s\n", str->str);
2324 g_string_free(str, TRUE);
2326 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2331 /* the actual capture loop
2333 * XXX - glib doesn't seem to provide any event based loop handling.
2335 * XXX - for whatever reason,
2336 * calling g_main_loop_new() ends up in 100% cpu load.
2338 * But that doesn't matter: in UNIX we can use select() to find an input
2339 * source with something to do.
2341 * But that doesn't matter because we're in a CLI (that doesn't need to
2342 * update a GUI or something at the same time) so it's OK if we block
2343 * trying to read from the pipe.
2345 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2346 * wrong (but I leave it there in case I am...).
2349 #ifdef USE_TSHARK_SELECT
2351 FD_SET(pipe_input.source, &readfds);
2354 loop_running = TRUE;
2358 while (loop_running)
2360 #ifdef USE_TSHARK_SELECT
2361 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2367 } else if (ret == 1) {
2369 /* Call the real handler */
2370 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2371 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2374 #ifdef USE_TSHARK_SELECT
2379 CATCH(OutOfMemoryError) {
2383 "Sorry, but TShark has to terminate now!\n"
2385 "Some infos / workarounds can be found at:\n"
2386 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2393 /* capture child detected an error */
2395 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2397 cmdarg_err("%s", error_msg);
2398 cmdarg_err_cont("%s", secondary_error_msg);
2402 /* capture child detected an capture filter related error */
2404 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2406 capture_options *capture_opts = cap_session->capture_opts;
2407 dfilter_t *rfcode = NULL;
2408 interface_options interface_opts;
2410 g_assert(i < capture_opts->ifaces->len);
2411 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2413 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2415 "Invalid capture filter \"%s\" for interface %s!\n"
2417 "That string looks like a valid display filter; however, it isn't a valid\n"
2418 "capture filter (%s).\n"
2420 "Note that display filters and capture filters don't have the same syntax,\n"
2421 "so you can't use most display filter expressions as capture filters.\n"
2423 "See the User's Guide for a description of the capture filter syntax.",
2424 interface_opts.cfilter, interface_opts.descr, error_message);
2425 dfilter_free(rfcode);
2428 "Invalid capture filter \"%s\" for interface %s!\n"
2430 "That string isn't a valid capture filter (%s).\n"
2431 "See the User's Guide for a description of the capture filter syntax.",
2432 interface_opts.cfilter, interface_opts.descr, error_message);
2437 /* capture child tells us we have a new (or the first) capture file */
2439 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2441 capture_options *capture_opts = cap_session->capture_opts;
2442 gboolean is_tempfile;
2445 if (cap_session->state == CAPTURE_PREPARING) {
2446 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2448 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2450 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2452 /* free the old filename */
2453 if (capture_opts->save_file != NULL) {
2455 /* we start a new capture file, close the old one (if we had one before) */
2456 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2457 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2458 wtap_close(((capture_file *) cap_session->cf)->wth);
2460 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2463 g_free(capture_opts->save_file);
2464 is_tempfile = FALSE;
2466 /* we didn't had a save_file before, must be a tempfile */
2470 /* save the new filename */
2471 capture_opts->save_file = g_strdup(new_file);
2473 /* if we are in real-time mode, open the new file now */
2474 if (do_dissection) {
2475 /* Attempt to open the capture file and set up to read from it. */
2476 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2480 /* Don't unlink (delete) the save file - leave it around,
2481 for debugging purposes. */
2482 g_free(capture_opts->save_file);
2483 capture_opts->save_file = NULL;
2488 cap_session->state = CAPTURE_RUNNING;
2494 /* capture child tells us we have new packets to read */
2496 capture_input_new_packets(capture_session *cap_session, int to_read)
2502 capture_file *cf = (capture_file *)cap_session->cf;
2503 gboolean filtering_tap_listeners;
2508 * Prevent a SIGINFO handler from writing to the standard error while
2509 * we're doing so or writing to the standard output; instead, have it
2510 * just set a flag telling us to print that information when we're done.
2513 #endif /* SIGINFO */
2515 /* Do we have any tap listeners with filters? */
2516 filtering_tap_listeners = have_filtering_tap_listeners();
2518 /* Get the union of the flags for all tap listeners. */
2519 tap_flags = union_of_tap_listener_flags();
2521 if (do_dissection) {
2522 while (to_read-- && cf->wth) {
2523 wtap_cleareof(cf->wth);
2524 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2526 /* read from file failed, tell the capture child to stop */
2527 sync_pipe_stop(cap_session);
2528 wtap_close(cf->wth);
2531 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2532 wtap_buf_ptr(cf->wth),
2533 filtering_tap_listeners, tap_flags);
2536 /* packet successfully read and gone through the "Read Filter" */
2542 * Dumpcap's doing all the work; we're not doing any dissection.
2543 * Count all the packets it wrote.
2545 packet_count += to_read;
2548 if (print_packet_counts) {
2549 /* We're printing packet counts. */
2550 if (packet_count != 0) {
2551 fprintf(stderr, "\r%u ", packet_count);
2552 /* stderr could be line buffered */
2559 * Allow SIGINFO handlers to write.
2564 * If a SIGINFO handler asked us to write out capture counts, do so.
2568 #endif /* SIGINFO */
2574 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2575 /* Report the count only if we aren't printing a packet count
2576 as packets arrive. */
2577 fprintf(stderr, "%u packet%s captured\n", packet_count,
2578 plurality(packet_count, "", "s"));
2581 infoprint = FALSE; /* we just reported it */
2582 #endif /* SIGINFO */
2587 report_counts_siginfo(int signum _U_)
2589 int sav_errno = errno;
2590 /* If we've been told to delay printing, just set a flag asking
2591 that we print counts (if we're supposed to), otherwise print
2592 the count of packets captured (if we're supposed to). */
2599 #endif /* SIGINFO */
2602 /* capture child detected any packet drops? */
2604 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2606 if (print_packet_counts) {
2607 /* We're printing packet counts to stderr.
2608 Send a newline so that we move to the line after the packet count. */
2609 fprintf(stderr, "\n");
2613 /* We're printing packet counts to stderr.
2614 Send a newline so that we move to the line after the packet count. */
2615 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2621 * Capture child closed its side of the pipe, report any error and
2622 * do the required cleanup.
2625 capture_input_closed(capture_session *cap_session, gchar *msg)
2627 capture_file *cf = (capture_file *) cap_session->cf;
2630 fprintf(stderr, "tshark: %s\n", msg);
2634 if (cf != NULL && cf->wth != NULL) {
2635 wtap_close(cf->wth);
2636 if (cf->is_tempfile) {
2637 ws_unlink(cf->filename);
2640 #ifdef USE_BROKEN_G_MAIN_LOOP
2641 /*g_main_loop_quit(loop);*/
2644 loop_running = FALSE;
2653 capture_cleanup(DWORD ctrltype _U_)
2655 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2656 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2657 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2658 like SIGTERM at least when the machine's shutting down.
2660 For now, we handle them all as indications that we should clean up
2661 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2664 We must return TRUE so that no other handler - such as one that would
2665 terminate the process - gets called.
2667 XXX - for some reason, typing ^C to TShark, if you run this in
2668 a Cygwin console window in at least some versions of Cygwin,
2669 causes TShark to terminate immediately; this routine gets
2670 called, but the main loop doesn't get a chance to run and
2671 exit cleanly, at least if this is compiled with Microsoft Visual
2672 C++ (i.e., it's a property of the Cygwin console window or Bash;
2673 it happens if TShark is not built with Cygwin - for all I know,
2674 building it with Cygwin may make the problem go away). */
2676 /* tell the capture child to stop */
2677 sync_pipe_stop(&global_capture_session);
2679 /* don't stop our own loop already here, otherwise status messages and
2680 * cleanup wouldn't be done properly. The child will indicate the stop of
2681 * everything by calling capture_input_closed() later */
2687 capture_cleanup(int signum _U_)
2689 /* tell the capture child to stop */
2690 sync_pipe_stop(&global_capture_session);
2692 /* don't stop our own loop already here, otherwise status messages and
2693 * cleanup wouldn't be done properly. The child will indicate the stop of
2694 * everything by calling capture_input_closed() later */
2697 #endif /* HAVE_LIBPCAP */
2700 process_packet_first_pass(capture_file *cf,
2701 gint64 offset, struct wtap_pkthdr *whdr,
2706 gboolean create_proto_tree = FALSE;
2710 /* The frame number of this packet is one more than the count of
2711 frames in this packet. */
2712 framenum = cf->count + 1;
2714 /* If we're not running a display filter and we're not printing any
2715 packet information, we don't need to do a dissection. This means
2716 that all packets can be marked as 'passed'. */
2719 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2721 /* If we're going to print packet information, or we're going to
2722 run a read filter, or display filter, or we're going to process taps, set up to
2723 do a dissection and do so. */
2724 if (do_dissection) {
2725 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2726 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2727 /* Grab any resolved addresses */
2728 host_name_lookup_process();
2730 /* If we're going to be applying a filter, we'll need to
2731 create a protocol tree against which to apply the filter. */
2733 create_proto_tree = TRUE;
2735 /* We're not going to display the protocol tree on this pass,
2736 so it's not going to be "visible". */
2737 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2739 /* If we're running a read filter, prime the epan_dissect_t with that
2742 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2744 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2746 if (ref == &fdlocal) {
2747 ref_frame = fdlocal;
2751 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2753 /* Run the read filter if we have one. */
2755 passed = dfilter_apply_edt(cf->rfcode, &edt);
2759 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2760 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2762 /* If we're not doing dissection then there won't be any dependent frames.
2763 * More importantly, edt.pi.dependent_frames won't be initialized because
2764 * epan hasn't been initialized.
2766 if (do_dissection) {
2767 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2772 /* if we don't add it to the frame_data_sequence, clean it up right now
2774 frame_data_destroy(&fdlocal);
2778 epan_dissect_cleanup(&edt);
2784 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2785 struct wtap_pkthdr *phdr, Buffer *buf,
2786 gboolean filtering_tap_listeners, guint tap_flags)
2788 gboolean create_proto_tree;
2793 /* If we're not running a display filter and we're not printing any
2794 packet information, we don't need to do a dissection. This means
2795 that all packets can be marked as 'passed'. */
2798 /* If we're going to print packet information, or we're going to
2799 run a read filter, or we're going to process taps, set up to
2800 do a dissection and do so. */
2801 if (do_dissection) {
2802 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2803 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2804 /* Grab any resolved addresses */
2805 host_name_lookup_process();
2807 if (cf->dfcode || print_details || filtering_tap_listeners ||
2808 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2809 create_proto_tree = TRUE;
2811 create_proto_tree = FALSE;
2813 /* The protocol tree will be "visible", i.e., printed, only if we're
2814 printing packet details, which is true if we're printing stuff
2815 ("print_packet_info" is true) and we're in verbose mode
2816 ("packet_details" is true). */
2817 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2819 /* If we're running a display filter, prime the epan_dissect_t with that
2822 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2824 col_custom_prime_edt(&edt, &cf->cinfo);
2826 /* We only need the columns if either
2827 1) some tap needs the columns
2829 2) we're printing packet info but we're *not* verbose; in verbose
2830 mode, we print the protocol tree, not the protocol summary.
2832 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2837 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2844 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2846 /* Run the read/display filter if we have one. */
2848 passed = dfilter_apply_edt(cf->dfcode, &edt);
2852 frame_data_set_after_dissect(fdata, &cum_bytes);
2853 /* Process this packet. */
2854 if (print_packet_info) {
2855 /* We're printing packet information; print the information for
2858 print_packet(cf, &edt);
2860 print_packet(cf, NULL);
2862 /* The ANSI C standard does not appear to *require* that a line-buffered
2863 stream be flushed to the host environment whenever a newline is
2864 written, it just says that, on such a stream, characters "are
2865 intended to be transmitted to or from the host environment as a
2866 block when a new-line character is encountered".
2868 The Visual C++ 6.0 C implementation doesn't do what is intended;
2869 even if you set a stream to be line-buffered, it still doesn't
2870 flush the buffer at the end of every line.
2872 So, if the "-l" flag was specified, we flush the standard output
2873 at the end of a packet. This will do the right thing if we're
2874 printing packet summary lines, and, as we print the entire protocol
2875 tree for a single packet without waiting for anything to happen,
2876 it should be as good as line-buffered mode if we're printing
2877 protocol trees. (The whole reason for the "-l" flag in either
2878 tcpdump or TShark is to allow the output of a live capture to
2879 be piped to a program or script and to have that script see the
2880 information for the packet as soon as it's printed, rather than
2881 having to wait until a standard I/O buffer fills up. */
2885 if (ferror(stdout)) {
2886 show_print_file_io_error(errno);
2894 if (do_dissection) {
2895 epan_dissect_cleanup(&edt);
2897 return passed || fdata->flags.dependent_of_displayed;
2901 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2902 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2905 int snapshot_length;
2909 gchar *err_info = NULL;
2911 char *save_file_string = NULL;
2912 gboolean filtering_tap_listeners;
2914 wtapng_section_t *shb_hdr;
2915 wtapng_iface_descriptions_t *idb_inf;
2919 shb_hdr = wtap_file_get_shb_info(cf->wth);
2920 idb_inf = wtap_file_get_idb_info(cf->wth);
2921 #ifdef PCAP_NG_DEFAULT
2922 if (idb_inf->number_of_interfaces > 1) {
2923 linktype = WTAP_ENCAP_PER_PACKET;
2925 linktype = wtap_file_encap(cf->wth);
2928 linktype = wtap_file_encap(cf->wth);
2930 if (save_file != NULL) {
2931 /* Get a string that describes what we're writing to */
2932 save_file_string = output_file_description(save_file);
2934 /* Set up to write to the capture file. */
2935 snapshot_length = wtap_snapshot_length(cf->wth);
2936 if (snapshot_length == 0) {
2937 /* Snapshot length of input file not known. */
2938 snapshot_length = WTAP_MAX_PACKET_SIZE;
2940 /* If we don't have an application name add Tshark */
2941 if (shb_hdr->shb_user_appl == NULL) {
2942 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2943 shb_hdr->shb_user_appl = appname;
2946 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2947 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2948 snapshot_length, FALSE /* compressed */, &err);
2950 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2951 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2957 /* We couldn't set up to write to the capture file. */
2960 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2961 cmdarg_err("Capture files can't be written in that format.");
2964 case WTAP_ERR_UNSUPPORTED_ENCAP:
2965 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2966 cmdarg_err("The capture file being read can't be written as a "
2967 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2970 case WTAP_ERR_CANT_OPEN:
2971 cmdarg_err("The %s couldn't be created for some "
2972 "unknown reason.", save_file_string);
2975 case WTAP_ERR_SHORT_WRITE:
2976 cmdarg_err("A full header couldn't be written to the %s.",
2981 cmdarg_err("The %s could not be created: %s.", save_file_string,
2982 wtap_strerror(err));
2988 if (print_packet_info) {
2989 if (!write_preamble(cf)) {
2991 show_print_file_io_error(err);
2998 if (pdh && out_file_name_res) {
2999 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
3000 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
3001 wtap_file_type_short_string(out_file_type));
3005 /* Do we have any tap listeners with filters? */
3006 filtering_tap_listeners = have_filtering_tap_listeners();
3008 /* Get the union of the flags for all tap listeners. */
3009 tap_flags = union_of_tap_listener_flags();
3011 if (perform_two_pass_analysis) {
3013 int old_max_packet_count = max_packet_count;
3015 /* Allocate a frame_data_sequence for all the frames. */
3016 cf->frames = new_frame_data_sequence();
3018 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3019 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3020 wtap_buf_ptr(cf->wth))) {
3021 /* Stop reading if we have the maximum number of packets;
3022 * When the -c option has not been used, max_packet_count
3023 * starts at 0, which practically means, never stop reading.
3024 * (unless we roll over max_packet_count ?)
3026 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3027 err = 0; /* This is not an error */
3033 /* Close the sequential I/O side, to free up memory it requires. */
3034 wtap_sequential_close(cf->wth);
3036 /* Allow the protocol dissectors to free up memory that they
3037 * don't need after the sequential run-through of the packets. */
3038 postseq_cleanup_all_protocols();
3040 max_packet_count = old_max_packet_count;
3044 buffer_init(&buf, 1500);
3045 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3046 fdata = frame_data_sequence_find(cf->frames, framenum);
3047 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3048 &buf, fdata->cap_len, &err, &err_info)) {
3049 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3050 filtering_tap_listeners, tap_flags)) {
3051 /* Either there's no read filtering or this packet passed the
3052 filter, so, if we're writing to a capture file, write
3055 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3056 /* Error writing to a capture file */
3059 case WTAP_ERR_UNSUPPORTED_ENCAP:
3061 * This is a problem with the particular frame we're writing;
3062 * note that, and give the frame number.
3064 * XXX - framenum is not necessarily the frame number in
3065 * the input file if there was a read filter.
3068 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3069 framenum, cf->filename,
3070 wtap_file_type_short_string(out_file_type));
3074 show_capture_file_io_error(save_file, err, FALSE);
3077 wtap_dump_close(pdh, &err);
3082 /* Stop reading if we have the maximum number of packets;
3083 * When the -c option has not been used, max_packet_count
3084 * starts at 0, which practically means, never stop reading.
3085 * (unless we roll over max_packet_count ?)
3087 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3088 err = 0; /* This is not an error */
3098 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3101 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3102 wtap_buf_ptr(cf->wth),
3103 filtering_tap_listeners, tap_flags)) {
3104 /* Either there's no read filtering or this packet passed the
3105 filter, so, if we're writing to a capture file, write
3108 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3109 /* Error writing to a capture file */
3112 case WTAP_ERR_UNSUPPORTED_ENCAP:
3114 * This is a problem with the particular frame we're writing;
3115 * note that, and give the frame number.
3118 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3119 framenum, cf->filename,
3120 wtap_file_type_short_string(out_file_type));
3124 show_capture_file_io_error(save_file, err, FALSE);
3127 wtap_dump_close(pdh, &err);
3132 /* Stop reading if we have the maximum number of packets;
3133 * When the -c option has not been used, max_packet_count
3134 * starts at 0, which practically means, never stop reading.
3135 * (unless we roll over max_packet_count ?)
3137 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3138 err = 0; /* This is not an error */
3147 * Print a message noting that the read failed somewhere along the line.
3149 * If we're printing packet data, and the standard output and error are
3150 * going to the same place, flush the standard output, so everything
3151 * buffered up is written, and then print a newline to the standard error
3152 * before printing the error message, to separate it from the packet
3153 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3154 * the _fstat() documentation at Microsoft doesn't indicate whether
3155 * st_ino is even supported.)
3158 if (print_packet_info) {
3159 struct stat stat_stdout, stat_stderr;
3161 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3162 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3163 stat_stdout.st_ino == stat_stderr.st_ino) {
3165 fprintf(stderr, "\n");
3172 case WTAP_ERR_UNSUPPORTED:
3173 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3174 cf->filename, err_info);
3178 case WTAP_ERR_UNSUPPORTED_ENCAP:
3179 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3180 cf->filename, err_info);
3184 case WTAP_ERR_CANT_READ:
3185 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3189 case WTAP_ERR_SHORT_READ:
3190 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3194 case WTAP_ERR_BAD_FILE:
3195 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3196 cf->filename, err_info);
3200 case WTAP_ERR_DECOMPRESS:
3201 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3202 "(%s)", cf->filename, err_info);
3206 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3207 cf->filename, wtap_strerror(err));
3210 if (save_file != NULL) {
3211 /* Now close the capture file. */
3212 if (!wtap_dump_close(pdh, &err))
3213 show_capture_file_io_error(save_file, err, TRUE);
3216 if (save_file != NULL) {
3217 /* Now close the capture file. */
3218 if (!wtap_dump_close(pdh, &err))
3219 show_capture_file_io_error(save_file, err, TRUE);
3221 if (print_packet_info) {
3222 if (!write_finale()) {
3224 show_print_file_io_error(err);
3231 wtap_close(cf->wth);
3234 g_free(save_file_string);
3241 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3243 gboolean filtering_tap_listeners, guint tap_flags)
3246 gboolean create_proto_tree;
3251 /* Count this packet. */
3254 /* If we're not running a display filter and we're not printing any
3255 packet information, we don't need to do a dissection. This means
3256 that all packets can be marked as 'passed'. */
3259 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3261 /* If we're going to print packet information, or we're going to
3262 run a read filter, or we're going to process taps, set up to
3263 do a dissection and do so. */
3264 if (do_dissection) {
3265 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3266 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3267 /* Grab any resolved addresses */
3268 host_name_lookup_process();
3270 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3271 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3272 create_proto_tree = TRUE;
3274 create_proto_tree = FALSE;
3276 /* The protocol tree will be "visible", i.e., printed, only if we're
3277 printing packet details, which is true if we're printing stuff
3278 ("print_packet_info" is true) and we're in verbose mode
3279 ("packet_details" is true). */
3280 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3282 /* If we're running a filter, prime the epan_dissect_t with that
3285 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3287 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3289 col_custom_prime_edt(&edt, &cf->cinfo);
3291 /* We only need the columns if either
3292 1) some tap needs the columns
3294 2) we're printing packet info but we're *not* verbose; in verbose
3295 mode, we print the protocol tree, not the protocol summary.
3297 3) there is a column mapped as an individual field */
3298 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3303 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3305 if (ref == &fdata) {
3310 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3312 /* Run the filters if we have them. */
3314 passed = dfilter_apply_edt(cf->rfcode, &edt);
3315 if (passed && cf->dfcode)
3316 passed = dfilter_apply_edt(cf->dfcode, &edt);
3320 frame_data_set_after_dissect(&fdata, &cum_bytes);
3322 /* Process this packet. */
3323 if (print_packet_info) {
3324 /* We're printing packet information; print the information for
3327 print_packet(cf, &edt);
3329 print_packet(cf, NULL);
3331 /* The ANSI C standard does not appear to *require* that a line-buffered
3332 stream be flushed to the host environment whenever a newline is
3333 written, it just says that, on such a stream, characters "are
3334 intended to be transmitted to or from the host environment as a
3335 block when a new-line character is encountered".
3337 The Visual C++ 6.0 C implementation doesn't do what is intended;
3338 even if you set a stream to be line-buffered, it still doesn't
3339 flush the buffer at the end of every line.
3341 So, if the "-l" flag was specified, we flush the standard output
3342 at the end of a packet. This will do the right thing if we're
3343 printing packet summary lines, and, as we print the entire protocol
3344 tree for a single packet without waiting for anything to happen,
3345 it should be as good as line-buffered mode if we're printing
3346 protocol trees. (The whole reason for the "-l" flag in either
3347 tcpdump or TShark is to allow the output of a live capture to
3348 be piped to a program or script and to have that script see the
3349 information for the packet as soon as it's printed, rather than
3350 having to wait until a standard I/O buffer fills up. */
3354 if (ferror(stdout)) {
3355 show_print_file_io_error(errno);
3360 /* this must be set after print_packet() [bug #8160] */
3361 prev_dis_frame = fdata;
3362 prev_dis = &prev_dis_frame;
3365 prev_cap_frame = fdata;
3366 prev_cap = &prev_cap_frame;
3368 if (do_dissection) {
3369 epan_dissect_cleanup(&edt);
3370 frame_data_destroy(&fdata);
3376 write_preamble(capture_file *cf)
3378 switch (output_action) {
3381 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3385 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3387 write_psml_preamble(stdout);
3388 return !ferror(stdout);
3391 write_fields_preamble(output_fields, stdout);
3392 return !ferror(stdout);
3395 g_assert_not_reached();
3401 get_line_buf(size_t len)
3403 static char *line_bufp = NULL;
3404 static size_t line_buf_len = 256;
3405 size_t new_line_buf_len;
3407 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3408 new_line_buf_len *= 2)
3410 if (line_bufp == NULL) {
3411 line_buf_len = new_line_buf_len;
3412 line_bufp = (char *)g_malloc(line_buf_len + 1);
3414 if (new_line_buf_len > line_buf_len) {
3415 line_buf_len = new_line_buf_len;
3416 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3423 print_columns(capture_file *cf)
3430 line_bufp = get_line_buf(256);
3433 for (i = 0; i < cf->cinfo.num_cols; i++) {
3434 /* Skip columns not marked as visible. */
3435 if (!get_column_visible(i))
3437 switch (cf->cinfo.col_fmt[i]) {
3441 * Don't print this if we're doing a live capture from a network
3442 * interface - if we're doing a live capture, you won't be
3443 * able to look at the capture in the future (it's not being
3444 * saved anywhere), so the frame numbers are unlikely to be
3447 * (XXX - it might be nice to be able to save and print at
3448 * the same time, sort of like an "Update list of packets
3449 * in real time" capture in Wireshark.)
3451 if (global_capture_opts.ifaces->len > 0)
3454 column_len = strlen(cf->cinfo.col_data[i]);
3457 line_bufp = get_line_buf(buf_offset + column_len);
3458 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3464 case COL_ABS_DATE_TIME:
3466 case COL_UTC_DATE_TIME: /* XXX - wider */
3467 column_len = strlen(cf->cinfo.col_data[i]);
3468 if (column_len < 10)
3470 line_bufp = get_line_buf(buf_offset + column_len);
3471 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3477 case COL_DEF_DL_SRC:
3478 case COL_RES_DL_SRC:
3479 case COL_UNRES_DL_SRC:
3480 case COL_DEF_NET_SRC:
3481 case COL_RES_NET_SRC:
3482 case COL_UNRES_NET_SRC:
3483 column_len = strlen(cf->cinfo.col_data[i]);
3484 if (column_len < 12)
3486 line_bufp = get_line_buf(buf_offset + column_len);
3487 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3493 case COL_DEF_DL_DST:
3494 case COL_RES_DL_DST:
3495 case COL_UNRES_DL_DST:
3496 case COL_DEF_NET_DST:
3497 case COL_RES_NET_DST:
3498 case COL_UNRES_NET_DST:
3499 column_len = strlen(cf->cinfo.col_data[i]);
3500 if (column_len < 12)
3502 line_bufp = get_line_buf(buf_offset + column_len);
3503 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3507 column_len = strlen(cf->cinfo.col_data[i]);
3508 line_bufp = get_line_buf(buf_offset + column_len);
3509 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3512 buf_offset += column_len;
3513 if (i != cf->cinfo.num_cols - 1) {
3515 * This isn't the last column, so we need to print a
3516 * separator between this column and the next.
3518 * If we printed a network source and are printing a
3519 * network destination of the same type next, separate
3520 * them with " -> "; if we printed a network destination
3521 * and are printing a network source of the same type
3522 * next, separate them with " <- "; otherwise separate them
3525 * We add enough space to the buffer for " <- " or " -> ",
3526 * even if we're only adding " ".
3528 line_bufp = get_line_buf(buf_offset + 4);
3529 switch (cf->cinfo.col_fmt[i]) {
3534 switch (cf->cinfo.col_fmt[i + 1]) {
3539 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3544 g_strlcat(line_bufp + buf_offset, " ", 5);
3550 case COL_DEF_DL_SRC:
3551 case COL_RES_DL_SRC:
3552 case COL_UNRES_DL_SRC:
3553 switch (cf->cinfo.col_fmt[i + 1]) {
3555 case COL_DEF_DL_DST:
3556 case COL_RES_DL_DST:
3557 case COL_UNRES_DL_DST:
3558 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3563 g_strlcat(line_bufp + buf_offset, " ", 5);
3569 case COL_DEF_NET_SRC:
3570 case COL_RES_NET_SRC:
3571 case COL_UNRES_NET_SRC:
3572 switch (cf->cinfo.col_fmt[i + 1]) {
3574 case COL_DEF_NET_DST:
3575 case COL_RES_NET_DST:
3576 case COL_UNRES_NET_DST:
3577 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3582 g_strlcat(line_bufp + buf_offset, " ", 5);
3591 switch (cf->cinfo.col_fmt[i + 1]) {
3596 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3601 g_strlcat(line_bufp + buf_offset, " ", 5);
3607 case COL_DEF_DL_DST:
3608 case COL_RES_DL_DST:
3609 case COL_UNRES_DL_DST:
3610 switch (cf->cinfo.col_fmt[i + 1]) {
3612 case COL_DEF_DL_SRC:
3613 case COL_RES_DL_SRC:
3614 case COL_UNRES_DL_SRC:
3615 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3620 g_strlcat(line_bufp + buf_offset, " ", 5);
3626 case COL_DEF_NET_DST:
3627 case COL_RES_NET_DST:
3628 case COL_UNRES_NET_DST:
3629 switch (cf->cinfo.col_fmt[i + 1]) {
3631 case COL_DEF_NET_SRC:
3632 case COL_RES_NET_SRC:
3633 case COL_UNRES_NET_SRC:
3634 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3639 g_strlcat(line_bufp + buf_offset, " ", 5);
3646 g_strlcat(line_bufp + buf_offset, " ", 5);
3652 return print_line(print_stream, 0, line_bufp);
3656 print_packet(capture_file *cf, epan_dissect_t *edt)
3658 print_args_t print_args;
3660 if (print_summary || output_fields_has_cols(output_fields)) {
3661 /* Just fill in the columns. */
3662 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3664 if (print_summary) {
3665 /* Now print them. */
3666 switch (output_action) {
3669 if (!print_columns(cf))
3674 proto_tree_write_psml(edt, stdout);
3675 return !ferror(stdout);
3676 case WRITE_FIELDS: /*No non-verbose "fields" format */
3677 g_assert_not_reached();
3682 if (print_details) {
3683 /* Print the information in the protocol tree. */
3684 switch (output_action) {
3687 /* Only initialize the fields that are actually used in proto_tree_print.
3688 * This is particularly important for .range, as that's heap memory which
3689 * we would otherwise have to g_free().
3690 print_args.to_file = TRUE;
3691 print_args.format = print_format;
3692 print_args.print_summary = print_summary;
3693 print_args.print_formfeed = FALSE;
3694 packet_range_init(&print_args.range, &cfile);
3696 print_args.print_hex = print_hex;
3697 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3699 if (!proto_tree_print(&print_args, edt, print_stream))
3702 if (!print_line(print_stream, 0, separator))
3708 proto_tree_write_pdml(edt, stdout);
3710 return !ferror(stdout);
3712 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3714 return !ferror(stdout);
3718 if (print_summary || print_details) {
3719 if (!print_line(print_stream, 0, ""))
3722 if (!print_hex_data(print_stream, edt))
3724 if (!print_line(print_stream, 0, separator))
3733 switch (output_action) {
3736 return print_finale(print_stream);
3740 write_pdml_finale(stdout);
3742 write_psml_finale(stdout);
3743 return !ferror(stdout);
3746 write_fields_finale(output_fields, stdout);
3747 return !ferror(stdout);
3750 g_assert_not_reached();
3756 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3760 char err_msg[2048+1];
3762 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3766 /* The open succeeded. Fill in the information for this file. */
3768 /* Create new epan session for dissection. */
3769 epan_free(cf->epan);
3770 cf->epan = tshark_epan_new(cf);
3773 cf->f_datalen = 0; /* not used, but set it anyway */
3775 /* Set the file name because we need it to set the follow stream filter.
3776 XXX - is that still true? We need it for other reasons, though,
3778 cf->filename = g_strdup(fname);
3780 /* Indicate whether it's a permanent or temporary file. */
3781 cf->is_tempfile = is_tempfile;
3783 /* No user changes yet. */
3784 cf->unsaved_changes = FALSE;
3786 cf->cd_t = wtap_file_type(cf->wth);
3788 cf->drops_known = FALSE;
3790 cf->snap = wtap_snapshot_length(cf->wth);
3791 if (cf->snap == 0) {
3792 /* Snapshot length not known. */
3793 cf->has_snap = FALSE;
3794 cf->snap = WTAP_MAX_PACKET_SIZE;
3796 cf->has_snap = TRUE;
3797 nstime_set_zero(&cf->elapsed_time);
3802 cf->state = FILE_READ_IN_PROGRESS;
3804 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3805 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3810 g_snprintf(err_msg, sizeof err_msg,
3811 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3812 cmdarg_err("%s", err_msg);
3817 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3819 char *save_file_string;
3821 save_file_string = output_file_description(fname);
3826 cmdarg_err("Not all the packets could be written to the %s because there is "
3827 "no space left on the file system.",
3833 cmdarg_err("Not all the packets could be written to the %s because you are "
3834 "too close to, or over your disk quota.",
3839 case WTAP_ERR_CANT_CLOSE:
3840 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3844 case WTAP_ERR_SHORT_WRITE:
3845 cmdarg_err("Not all the packets could be written to the %s.",
3851 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3852 wtap_strerror(err));
3854 cmdarg_err("An error occurred while writing to the %s: %s.",
3855 save_file_string, wtap_strerror(err));
3859 g_free(save_file_string);
3863 show_print_file_io_error(int err)
3868 cmdarg_err("Not all the packets could be printed because there is "
3869 "no space left on the file system.");
3874 cmdarg_err("Not all the packets could be printed because you are "
3875 "too close to, or over your disk quota.");
3880 cmdarg_err("An error occurred while printing packets: %s.",
3887 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3891 static char errmsg_errno[1024+1];
3894 /* Wiretap error. */
3897 case WTAP_ERR_NOT_REGULAR_FILE:
3898 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3901 case WTAP_ERR_RANDOM_OPEN_PIPE:
3902 /* Seen only when opening a capture file for reading. */
3903 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3906 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3907 /* Seen only when opening a capture file for reading. */
3908 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3911 case WTAP_ERR_UNSUPPORTED:
3912 /* Seen only when opening a capture file for reading. */
3913 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3914 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3917 errmsg = errmsg_errno;
3920 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3921 /* Seen only when opening a capture file for writing. */
3922 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3923 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3924 "written to a pipe.", wtap_file_type_short_string(file_type));
3925 errmsg = errmsg_errno;
3928 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3929 /* Seen only when opening a capture file for writing. */
3930 errmsg = "TShark doesn't support writing capture files in that format.";
3933 case WTAP_ERR_UNSUPPORTED_ENCAP:
3935 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3936 "TShark can't save this capture as a \"%s\" file.",
3937 wtap_file_type_short_string(file_type));
3939 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3940 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3944 errmsg = errmsg_errno;
3947 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3949 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3950 "TShark can't save this capture as a \"%s\" file.",
3951 wtap_file_type_short_string(file_type));
3952 errmsg = errmsg_errno;
3954 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3957 case WTAP_ERR_BAD_FILE:
3958 /* Seen only when opening a capture file for reading. */
3959 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3960 "The file \"%%s\" appears to be damaged or corrupt.\n"
3963 errmsg = errmsg_errno;
3966 case WTAP_ERR_CANT_OPEN:
3968 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3970 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3973 case WTAP_ERR_SHORT_READ:
3974 errmsg = "The file \"%s\" appears to have been cut short"
3975 " in the middle of a packet or other data.";
3978 case WTAP_ERR_SHORT_WRITE:
3979 errmsg = "A full header couldn't be written to the file \"%s\".";
3982 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3983 errmsg = "This file type cannot be written as a compressed file.";
3986 case WTAP_ERR_DECOMPRESS:
3987 /* Seen only when opening a capture file for reading. */
3988 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3989 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3992 errmsg = errmsg_errno;
3996 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3997 "The file \"%%s\" could not be %s: %s.",
3998 for_writing ? "created" : "opened",
3999 wtap_strerror(err));
4000 errmsg = errmsg_errno;
4004 errmsg = file_open_error_message(err, for_writing);
4009 * Open/create errors are reported with an console message in TShark.
4012 open_failure_message(const char *filename, int err, gboolean for_writing)
4014 fprintf(stderr, "tshark: ");
4015 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4016 fprintf(stderr, "\n");
4021 * General errors are reported with an console message in TShark.
4024 failure_message(const char *msg_format, va_list ap)
4026 fprintf(stderr, "tshark: ");
4027 vfprintf(stderr, msg_format, ap);
4028 fprintf(stderr, "\n");
4032 * Read errors are reported with an console message in TShark.
4035 read_failure_message(const char *filename, int err)
4037 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4038 filename, g_strerror(err));
4042 * Write errors are reported with an console message in TShark.
4045 write_failure_message(const char *filename, int err)
4047 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4048 filename, g_strerror(err));
4052 * Report an error in command-line arguments.
4055 cmdarg_err(const char *fmt, ...)
4060 failure_message(fmt, ap);
4065 * Report additional information for an error in command-line arguments.
4068 cmdarg_err_cont(const char *fmt, ...)
4073 vfprintf(stderr, fmt, ap);
4074 fprintf(stderr, "\n");
4080 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4085 * indent-tabs-mode: nil
4088 * vi: set shiftwidth=2 tabstop=8 expandtab:
4089 * :indentSize=2:tabSize=8:noTabs=true: