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.
48 #ifdef HAVE_SYS_STAT_H
49 # include <sys/stat.h>
53 #include "wsutil/wsgetopt.h"
57 #include <epan/epan.h>
58 #include <epan/filesystem.h>
59 #include <wsutil/crash_info.h>
60 #include <wsutil/privileges.h>
61 #include <wsutil/file_util.h>
64 #include <epan/timestamp.h>
65 #include <epan/packet.h>
67 #include "disabled_protos.h"
68 #include <epan/prefs.h>
69 #include <epan/column.h>
71 #include <epan/addr_resolv.h>
73 #include "clopts_common.h"
74 #include "console_io.h"
75 #include "cmdarg_err.h"
76 #include "version_info.h"
77 #include <epan/plugins.h>
79 #include <epan/epan_dissect.h>
81 #include <epan/stat_cmd_args.h>
82 #include <epan/timestamp.h>
83 #include <epan/ex-opt.h>
86 #include "capture_ui_utils.h"
87 #include "capture_ifinfo.h"
88 #include "capture-pcap-util.h"
90 #include "capture-wpcap.h"
91 #include <wsutil/unicode-utils.h>
93 #include "capture_sync.h"
94 #endif /* HAVE_LIBPCAP */
96 #include <epan/funnel.h>
97 #include "capture_opts.h"
100 * This is the template for the decode as option; it is shared between the
101 * various functions that output the usage for this parameter.
103 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
105 static guint32 cum_bytes;
106 static nstime_t first_ts;
107 static frame_data *prev_dis;
108 static frame_data prev_dis_frame;
109 static frame_data *prev_cap;
110 static frame_data prev_cap_frame;
112 static const char* prev_display_dissector_name = NULL;
114 static gboolean perform_two_pass_analysis;
117 * The way the packet decode is to be written.
120 WRITE_TEXT, /* summary or detail text */
121 WRITE_XML, /* PDML or PSML */
122 WRITE_FIELDS /* User defined list of fields */
123 /* Add CSV and the like here */
126 static output_action_e output_action;
127 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
128 static gboolean print_packet_info; /* TRUE if we're to print packet information */
129 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
130 static gboolean print_details; /* TRUE if we're to print packet details information */
131 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
132 static gboolean line_buffered;
133 static gboolean really_quiet = FALSE;
135 static print_format_e print_format = PR_FMT_TEXT;
136 static print_stream_t *print_stream;
138 static output_fields_t* output_fields = NULL;
140 /* The line separator used between packets, changeable via the -S option */
141 static const char *separator = "";
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts = TRUE;
149 static capture_options global_capture_opts;
152 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
153 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
156 static gboolean capture(void);
157 static void report_counts(void);
159 static BOOL WINAPI capture_cleanup(DWORD);
161 static void capture_cleanup(int);
163 static void report_counts_siginfo(int);
166 #endif /* HAVE_LIBPCAP */
168 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
169 static gboolean process_packet(capture_file *cf, gint64 offset,
170 struct wtap_pkthdr *whdr,
171 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
172 static void show_capture_file_io_error(const char *, int, gboolean);
173 static void show_print_file_io_error(int err);
174 static gboolean write_preamble(capture_file *cf);
175 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
176 static gboolean write_finale(void);
177 static const char *cf_open_error_message(int err, gchar *err_info,
178 gboolean for_writing, int file_type);
180 static void open_failure_message(const char *filename, int err,
181 gboolean for_writing);
182 static void failure_message(const char *msg_format, va_list ap);
183 static void read_failure_message(const char *filename, int err);
184 static void write_failure_message(const char *filename, int err);
189 const char *sstr; /* The short string */
190 const char *lstr; /* The long string */
194 string_compare(gconstpointer a, gconstpointer b)
196 return strcmp(((const struct string_elem *)a)->sstr,
197 ((const struct string_elem *)b)->sstr);
201 string_elem_print(gpointer data, gpointer not_used _U_)
203 fprintf(stderr, " %s - %s\n",
204 ((struct string_elem *)data)->sstr,
205 ((struct string_elem *)data)->lstr);
209 list_capture_types(void) {
211 struct string_elem *captypes;
214 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
216 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
217 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
218 if (wtap_dump_can_open(i)) {
219 captypes[i].sstr = wtap_file_type_short_string(i);
220 captypes[i].lstr = wtap_file_type_string(i);
221 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
224 g_slist_foreach(list, string_elem_print, NULL);
230 print_usage(gboolean print_ver)
237 "TShark " VERSION "%s\n"
238 "Dump and analyze network traffic.\n"
239 "See http://www.wireshark.org for more information.\n"
242 wireshark_svnversion, get_copyright_info());
246 fprintf(output, "\n");
247 fprintf(output, "Usage: tshark [options] ...\n");
248 fprintf(output, "\n");
251 fprintf(output, "Capture interface:\n");
252 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
253 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
254 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
255 fprintf(output, " -p don't capture in promiscuous mode\n");
256 #ifdef HAVE_PCAP_CREATE
257 fprintf(output, " -I capture in monitor mode, if available\n");
259 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
260 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
262 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
263 fprintf(output, " -D print list of interfaces and exit\n");
264 fprintf(output, " -L print list of link-layer types of iface and exit\n");
265 fprintf(output, "\n");
266 fprintf(output, "Capture stop conditions:\n");
267 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
268 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
269 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
270 fprintf(output, " files:NUM - stop after NUM files\n");
271 /*fprintf(output, "\n");*/
272 fprintf(output, "Capture output:\n");
273 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
274 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
275 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
276 #endif /* HAVE_LIBPCAP */
277 #ifdef HAVE_PCAP_REMOTE
278 fprintf(output, "RPCAP options:\n");
279 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
281 /*fprintf(output, "\n");*/
282 fprintf(output, "Input file:\n");
283 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
285 fprintf(output, "\n");
286 fprintf(output, "Processing:\n");
287 fprintf(output, " -2 perform a two-pass analysis\n");
288 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
289 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
290 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
291 fprintf(output, " -d %s ...\n", decode_as_arg_template);
292 fprintf(output, " \"Decode As\", see the man page for details\n");
293 fprintf(output, " Example: tcp.port==8888,http\n");
294 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
295 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
297 /*fprintf(output, "\n");*/
298 fprintf(output, "Output:\n");
299 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
300 fprintf(output, " (or to the standard output for \"-\")\n");
301 fprintf(output, " -C <config profile> start with specified configuration profile\n");
302 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
303 fprintf(output, " an empty \"-F\" option will list the file types\n");
304 fprintf(output, " -V add output of packet tree (Packet Details)\n");
305 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
306 fprintf(output, " separated\n");
307 fprintf(output, " -P print packet summary even when writing to a file\n");
308 fprintf(output, " -S <separator> the line separator to print between packets\n");
309 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
310 fprintf(output, " -T pdml|ps|psml|text|fields\n");
311 fprintf(output, " format of text output (def: text)\n");
312 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
313 fprintf(output, " this option can be repeated to print multiple fields\n");
314 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
315 fprintf(output, " header=y|n switch headers on and off\n");
316 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
317 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
318 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
319 fprintf(output, " aggregator\n");
320 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
321 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
322 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
323 fprintf(output, " -l flush standard output after each packet\n");
324 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
325 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
326 fprintf(output, " -g enable group read access on the output file(s)\n");
327 fprintf(output, " -W n Save extra information in the file, if supported.\n");
328 fprintf(output, " n = write network address resolution information\n");
329 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
330 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
332 fprintf(output, "\n");
333 fprintf(output, "Miscellaneous:\n");
334 fprintf(output, " -h display this help and exit\n");
335 fprintf(output, " -v display version info and exit\n");
336 fprintf(output, " -o <name>:<value> ... override preference setting\n");
337 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
338 fprintf(output, " -G [report] dump one of several available reports and exit\n");
339 fprintf(output, " default report=\"fields\"\n");
340 fprintf(output, " use \"-G ?\" for more help\n");
344 glossary_option_help(void)
350 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
352 fprintf(output, "\n");
353 fprintf(output, "Usage: tshark -G [report]\n");
354 fprintf(output, "\n");
355 fprintf(output, "Glossary table reports:\n");
356 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
357 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
358 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
359 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
360 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
361 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
362 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
363 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
364 fprintf(output, "\n");
365 fprintf(output, "Preference reports:\n");
366 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
367 fprintf(output, " -G currentprefs dump current preferences and exit\n");
368 fprintf(output, "\n");
373 * For a dissector table, print on the stream described by output,
374 * its short name (which is what's used in the "-d" option) and its
378 display_dissector_table_names(const char *table_name, const char *ui_name,
381 if ((prev_display_dissector_name == NULL) ||
382 (strcmp(prev_display_dissector_name, table_name) != 0)) {
383 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
384 prev_display_dissector_name = table_name;
389 * For a dissector handle, print on the stream described by output,
390 * the filter name (which is what's used in the "-d" option) and the full
391 * name for the protocol that corresponds to this handle.
394 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
397 const gchar *proto_filter_name;
398 const gchar *proto_ui_name;
400 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
402 if (proto_id != -1) {
403 proto_filter_name = proto_get_protocol_filter_name(proto_id);
404 proto_ui_name = proto_get_protocol_name(proto_id);
405 g_assert(proto_filter_name != NULL);
406 g_assert(proto_ui_name != NULL);
408 if ((prev_display_dissector_name == NULL) ||
409 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
410 fprintf((FILE *)output, "\t%s (%s)\n",
413 prev_display_dissector_name = proto_filter_name;
419 * The protocol_name_search structure is used by find_protocol_name_func()
420 * to pass parameters and store results
422 struct protocol_name_search{
423 gchar *searched_name; /* Protocol filter name we are looking for */
424 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
425 guint nb_match; /* How many dissectors matched searched_name */
427 typedef struct protocol_name_search *protocol_name_search_t;
430 * This function parses all dissectors associated with a table to find the
431 * one whose protocol has the specified filter name. It is called
432 * as a reference function in a call to dissector_table_foreach_handle.
433 * The name we are looking for, as well as the results, are stored in the
434 * protocol_name_search struct pointed to by user_data.
435 * If called using dissector_table_foreach_handle, we actually parse the
436 * whole list of dissectors.
439 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
443 const gchar *protocol_filter_name;
444 protocol_name_search_t search_info;
448 search_info = (protocol_name_search_t)user_data;
450 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
451 if (proto_id != -1) {
452 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
453 g_assert(protocol_filter_name != NULL);
454 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
456 if (search_info->nb_match == 0) {
457 /* Record this handle only if this is the first match */
458 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
460 search_info->nb_match++;
466 * Allow dissector key names to be sorted alphabetically
470 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
472 return strcmp((const char*)dissector_a, (const char*)dissector_b);
476 * Print all layer type names supported.
477 * We send the output to the stream described by the handle output.
481 fprint_all_layer_types(FILE *output)
484 prev_display_dissector_name = NULL;
485 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
489 * Print all protocol names supported for a specific layer type.
490 * table_name contains the layer type name in which the search is performed.
491 * We send the output to the stream described by the handle output.
495 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
498 prev_display_dissector_name = NULL;
499 dissector_table_foreach_handle(table_name,
500 display_dissector_names,
505 * The function below parses the command-line parameters for the decode as
506 * feature (a string pointer by cl_param).
507 * It checks the format of the command-line, searches for a matching table
508 * and dissector. If a table/dissector match is not found, we display a
509 * summary of the available tables/dissectors (on stderr) and return FALSE.
510 * If everything is fine, we get the "Decode as" preference activated,
511 * then we return TRUE.
514 add_decode_as(const gchar *cl_param)
517 guint32 selector, selector2;
518 gchar *decoded_param;
519 gchar *remaining_param;
521 gchar *dissector_str;
522 dissector_handle_t dissector_matching;
523 dissector_table_t table_matching;
524 ftenum_t dissector_table_selector_type;
525 struct protocol_name_search user_protocol_name;
529 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
532 decoded_param = g_strdup(cl_param);
533 g_assert(decoded_param);
536 /* The lines below will parse this string (modifying it) to extract all
537 necessary information. Note that decoded_param is still needed since
538 strings are not copied - we just save pointers. */
540 /* This section extracts a layer type (table_name) from decoded_param */
541 table_name = decoded_param; /* Layer type string starts from beginning */
543 remaining_param = strchr(table_name, '=');
544 if (remaining_param == NULL) {
545 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
546 /* If the argument does not follow the template, carry on anyway to check
547 if the table name is at least correct. If remaining_param is NULL,
548 we'll exit anyway further down */
551 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
554 /* Remove leading and trailing spaces from the table name */
555 while ( table_name[0] == ' ' )
557 while ( table_name[strlen(table_name) - 1] == ' ' )
558 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
560 /* The following part searches a table matching with the layer type specified */
561 table_matching = NULL;
563 /* Look for the requested table */
564 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
565 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
568 table_matching = find_dissector_table(table_name);
569 if (!table_matching) {
570 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
574 if (!table_matching) {
575 /* Display a list of supported layer types to help the user, if the
576 specified layer type was not found */
577 cmdarg_err("Valid layer types are:");
578 fprint_all_layer_types(stderr);
580 if (remaining_param == NULL || !table_matching) {
581 /* Exit if the layer type was not found, or if no '=' separator was found
583 g_free(decoded_param);
587 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
588 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
591 remaining_param++; /* Move to the second '=' */
592 *remaining_param = '\0'; /* Remove the second '=' */
594 remaining_param++; /* Position after the layer type string */
596 /* This section extracts a selector value (selector_str) from decoded_param */
598 selector_str = remaining_param; /* Next part starts with the selector number */
600 remaining_param = strchr(selector_str, ',');
601 if (remaining_param == NULL) {
602 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
603 /* If the argument does not follow the template, carry on anyway to check
604 if the selector value is at least correct. If remaining_param is NULL,
605 we'll exit anyway further down */
608 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
611 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
613 switch (dissector_table_selector_type) {
619 /* The selector for this table is an unsigned number. Parse it as such.
620 There's no need to remove leading and trailing spaces from the
621 selector number string, because sscanf will do that for us. */
622 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
627 if (op != ':' && op != '-') {
628 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
629 g_free(decoded_param);
633 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
634 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
635 g_free(decoded_param);
639 else if (selector2 < selector) {
640 /* We could swap them for the user, but maybe it's better to call
641 * this out as an error in case it's not what was intended? */
642 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
643 g_free(decoded_param);
648 cmdarg_err("Invalid selector number \"%s\"", selector_str);
649 g_free(decoded_param);
656 /* The selector for this table is a string. */
660 /* There are currently no dissector tables with any types other
661 than the ones listed above. */
662 g_assert_not_reached();
665 if (remaining_param == NULL) {
666 /* Exit if no ',' separator was found (see above) */
667 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
668 fprint_all_protocols_for_layer_types(stderr, table_name);
669 g_free(decoded_param);
673 remaining_param++; /* Position after the selector number string */
675 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
677 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
679 /* Remove leading and trailing spaces from the dissector name */
680 while ( dissector_str[0] == ' ' )
682 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
683 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
685 dissector_matching = NULL;
687 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
688 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 */
689 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
692 user_protocol_name.nb_match = 0;
693 user_protocol_name.searched_name = dissector_str;
694 user_protocol_name.matched_handle = NULL;
696 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 */
698 if (user_protocol_name.nb_match != 0) {
699 dissector_matching = user_protocol_name.matched_handle;
700 if (user_protocol_name.nb_match > 1) {
701 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
705 /* OK, check whether the problem is that there isn't any such
706 protocol, or that there is but it's not specified as a protocol
707 that's valid for that dissector table.
708 Note, we don't exit here, but dissector_matching will remain NULL,
710 if (proto_get_id_by_filter_name(dissector_str) == -1) {
711 /* No such protocol */
712 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
714 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
715 dissector_str, table_name);
720 if (!dissector_matching) {
721 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
722 fprint_all_protocols_for_layer_types(stderr, table_name);
723 g_free(decoded_param);
727 /* This is the end of the code that parses the command-line options.
728 All information is now stored in the variables:
732 The above variables that are strings are still pointing to areas within
733 decoded_parm. decoded_parm thus still needs to be kept allocated in
734 until we stop needing these variables
735 decoded_param will be deallocated at each exit point of this function */
738 /* We now have a pointer to the handle for the requested dissector
739 (requested protocol) inside the variable dissector_matching */
740 switch (dissector_table_selector_type) {
746 /* The selector for this table is an unsigned number. */
748 dissector_change_uint(table_name, selector, dissector_matching);
749 } else if (op == ':') {
750 for (i = selector; i < (guint64)selector + selector2; i++) {
751 dissector_change_uint(table_name, (guint32)i, dissector_matching);
753 } else { /* op == '-' */
754 for (i = selector; i <= selector2; i++) {
755 dissector_change_uint(table_name, (guint32)i, dissector_matching);
762 /* The selector for this table is a string. */
763 dissector_change_string(table_name, selector_str, dissector_matching);
767 /* There are currently no dissector tables with any types other
768 than the ones listed above. */
769 g_assert_not_reached();
771 g_free(decoded_param); /* "Decode As" rule has been successfully added */
776 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
777 const gchar *message, gpointer user_data)
779 /* ignore log message, if log_level isn't interesting based
780 upon the console log preferences.
781 If the preferences haven't been loaded loaded yet, display the
784 The default console_log_level preference value is such that only
785 ERROR, CRITICAL and WARNING level messages are processed;
786 MESSAGE, INFO and DEBUG level messages are ignored.
788 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
789 ERROR and CRITICAL level messages so the current code is a behavioral
790 change. The current behavior is the same as in Wireshark.
792 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
793 prefs.console_log_level != 0) {
797 g_log_default_handler(log_domain, log_level, message, user_data);
802 output_file_description(const char *fname)
804 char *save_file_string;
806 /* Get a string that describes what we're writing to */
807 if (strcmp(fname, "-") == 0) {
808 /* We're writing to the standard output */
809 save_file_string = g_strdup("standard output");
811 /* We're writing to a file with the name in save_file */
812 save_file_string = g_strdup_printf("file \"%s\"", fname);
814 return save_file_string;
818 print_current_user(void) {
819 gchar *cur_user, *cur_group;
821 if (started_with_special_privs()) {
822 cur_user = get_cur_username();
823 cur_group = get_cur_groupname();
824 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
825 cur_user, cur_group);
828 if (running_with_special_privs()) {
829 fprintf(stderr, " This could be dangerous.");
831 fprintf(stderr, "\n");
836 check_capture_privs(void) {
839 /* Warn the user if npf.sys isn't loaded. */
840 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
841 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
842 "capturing or\nlisting interfaces.\n");
848 show_version(GString *comp_info_str, GString *runtime_info_str)
850 printf("TShark " VERSION "%s\n"
857 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
858 runtime_info_str->str);
862 main(int argc, char *argv[])
864 GString *comp_info_str;
865 GString *runtime_info_str;
866 char *init_progfile_dir_error;
868 gboolean arg_error = FALSE;
874 char *gpf_path, *pf_path;
875 char *gdp_path, *dp_path;
876 int gpf_open_errno, gpf_read_errno;
877 int pf_open_errno, pf_read_errno;
878 int gdp_open_errno, gdp_read_errno;
879 int dp_open_errno, dp_read_errno;
881 volatile int exit_status = 0;
883 gboolean list_link_layer_types = FALSE;
884 gboolean start_capture = FALSE;
889 gboolean capture_option_specified = FALSE;
891 gboolean quiet = FALSE;
892 #ifdef PCAP_NG_DEFAULT
893 volatile int out_file_type = WTAP_FILE_PCAPNG;
895 volatile int out_file_type = WTAP_FILE_PCAP;
897 volatile gboolean out_file_name_res = FALSE;
898 gchar *volatile cf_name = NULL;
899 gchar *rfilter = NULL;
900 #ifdef HAVE_PCAP_OPEN_DEAD
901 struct bpf_program fcode;
903 dfilter_t *rfcode = NULL;
906 GLogLevelFlags log_flags;
908 gchar *output_only = NULL;
910 #ifdef HAVE_PCAP_REMOTE
911 #define OPTSTRING_A "A:"
913 #define OPTSTRING_A ""
916 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
917 #define OPTSTRING_B "B:"
919 #define OPTSTRING_B ""
920 #endif /* _WIN32 or HAVE_PCAP_CREATE */
921 #else /* HAVE_LIBPCAP */
922 #define OPTSTRING_B ""
923 #endif /* HAVE_LIBPCAP */
925 #ifdef HAVE_PCAP_CREATE
926 #define OPTSTRING_I "I"
928 #define OPTSTRING_I ""
931 #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:z:"
933 static const char optstring[] = OPTSTRING;
935 /* Assemble the compile-time version information string */
936 comp_info_str = g_string_new("Compiled ");
937 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
939 /* Assemble the run-time version information string */
940 runtime_info_str = g_string_new("Running ");
941 get_runtime_version_info(runtime_info_str, NULL);
943 /* Add it to the information to be reported on a crash. */
944 ws_add_crash_info("TShark " VERSION "%s\n"
949 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
952 arg_list_utf_16to8(argc, argv);
953 create_app_running_mutex();
954 #if !GLIB_CHECK_VERSION(2,31,0)
960 * Get credential information for later use.
962 init_process_policies();
965 * Attempt to get the pathname of the executable file.
967 init_progfile_dir_error = init_progfile_dir(argv[0], main);
968 if (init_progfile_dir_error != NULL) {
969 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
970 init_progfile_dir_error);
974 * In order to have the -X opts assigned before the wslua machine starts
975 * we need to call getopts before epan_init() gets called.
978 optind_initial = optind;
980 while ((opt = getopt(argc, argv, optstring)) != -1) {
982 case 'C': /* Configuration Profile */
983 if (profile_exists (optarg, FALSE)) {
984 set_profile_name (optarg);
986 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
990 case 'P': /* Print packet summary info even when writing to a file */
991 print_packet_info = TRUE;
992 print_summary = TRUE;
994 case 'O': /* Only output these protocols */
995 output_only = g_strdup(optarg);
997 case 'V': /* Verbose */
998 print_details = TRUE;
999 print_packet_info = TRUE;
1001 case 'x': /* Print packet data in hex (and ASCII) */
1003 /* The user asked for hex output, so let's ensure they get it,
1004 * even if they're writing to a file.
1006 print_packet_info = TRUE;
1017 * Print packet summary information is the default, unless either -V or -x
1018 * were specified and -P was not. Note that this is new behavior, which
1019 * allows for the possibility of printing only hex/ascii output without
1020 * necessarily requiring that either the summary or details be printed too.
1022 if (print_summary == -1)
1023 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1025 optind = optind_initial;
1030 /** Send All g_log messages to our own handler **/
1034 G_LOG_LEVEL_CRITICAL|
1035 G_LOG_LEVEL_WARNING|
1036 G_LOG_LEVEL_MESSAGE|
1039 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1041 g_log_set_handler(NULL,
1043 tshark_log_handler, NULL /* user_data */);
1044 g_log_set_handler(LOG_DOMAIN_MAIN,
1046 tshark_log_handler, NULL /* user_data */);
1049 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1051 tshark_log_handler, NULL /* user_data */);
1052 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1054 tshark_log_handler, NULL /* user_data */);
1057 initialize_funnel_ops();
1060 capture_opts_init(&global_capture_opts, &cfile);
1063 timestamp_set_type(TS_RELATIVE);
1064 timestamp_set_precision(TS_PREC_AUTO);
1065 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1067 /* Register all dissectors; we must do this before checking for the
1068 "-G" flag, as the "-G" flag dumps information registered by the
1069 dissectors, and we must do it before we read the preferences, in
1070 case any dissectors register preferences. */
1071 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1072 failure_message, open_failure_message, read_failure_message,
1073 write_failure_message);
1075 /* Register all tap listeners; we do this before we parse the arguments,
1076 as the "-z" argument can specify a registered tap. */
1078 /* we register the plugin taps before the other taps because
1079 stats_tree taps plugins will be registered as tap listeners
1080 by stats_tree_stat.c and need to registered before that */
1082 register_all_plugin_tap_listeners();
1084 register_all_tap_listeners();
1086 /* If invoked with the "-G" flag, we dump out information based on
1087 the argument to the "-G" flag; if no argument is specified,
1088 for backwards compatibility we dump out a glossary of display
1091 XXX - we do this here, for now, to support "-G" with no arguments.
1092 If none of our build or other processes uses "-G" with no arguments,
1093 we can just process it with the other arguments. */
1094 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1095 proto_initialize_all_prefixes();
1098 proto_registrar_dump_fields(1);
1100 if (strcmp(argv[2], "fields") == 0)
1101 proto_registrar_dump_fields(1);
1102 else if (strcmp(argv[2], "fields2") == 0)
1103 proto_registrar_dump_fields(2);
1104 else if (strcmp(argv[2], "fields3") == 0)
1105 proto_registrar_dump_fields(3);
1106 else if (strcmp(argv[2], "protocols") == 0)
1107 proto_registrar_dump_protocols();
1108 else if (strcmp(argv[2], "values") == 0)
1109 proto_registrar_dump_values();
1110 else if (strcmp(argv[2], "ftypes") == 0)
1111 proto_registrar_dump_ftypes();
1112 else if (strcmp(argv[2], "decodes") == 0)
1113 dissector_dump_decodes();
1114 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1115 dissector_dump_heur_decodes();
1116 else if (strcmp(argv[2], "defaultprefs") == 0)
1118 else if (strcmp(argv[2], "plugins") == 0)
1120 else if (strcmp(argv[2], "?") == 0)
1121 glossary_option_help();
1122 else if (strcmp(argv[2], "-?") == 0)
1123 glossary_option_help();
1124 else if (strcmp(argv[2], "currentprefs") == 0) {
1125 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1126 &pf_open_errno, &pf_read_errno, &pf_path);
1129 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1136 /* Set the C-language locale to the native environment. */
1137 setlocale(LC_ALL, "");
1139 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1140 &pf_open_errno, &pf_read_errno, &pf_path);
1141 if (gpf_path != NULL) {
1142 if (gpf_open_errno != 0) {
1143 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1144 pf_path, g_strerror(gpf_open_errno));
1146 if (gpf_read_errno != 0) {
1147 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1148 pf_path, g_strerror(gpf_read_errno));
1151 if (pf_path != NULL) {
1152 if (pf_open_errno != 0) {
1153 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1154 g_strerror(pf_open_errno));
1156 if (pf_read_errno != 0) {
1157 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1158 pf_path, g_strerror(pf_read_errno));
1164 /* Read the disabled protocols file. */
1165 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1166 &dp_path, &dp_open_errno, &dp_read_errno);
1167 if (gdp_path != NULL) {
1168 if (gdp_open_errno != 0) {
1169 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1170 gdp_path, g_strerror(gdp_open_errno));
1172 if (gdp_read_errno != 0) {
1173 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1174 gdp_path, g_strerror(gdp_read_errno));
1178 if (dp_path != NULL) {
1179 if (dp_open_errno != 0) {
1181 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1182 g_strerror(dp_open_errno));
1184 if (dp_read_errno != 0) {
1186 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1187 g_strerror(dp_read_errno));
1192 check_capture_privs();
1194 cap_file_init(&cfile);
1196 /* Print format defaults to this. */
1197 print_format = PR_FMT_TEXT;
1199 output_fields = output_fields_new();
1201 /* Now get our args */
1202 while ((opt = getopt(argc, argv, optstring)) != -1) {
1204 case '2': /* Perform two pass analysis */
1205 perform_two_pass_analysis = TRUE;
1207 case 'a': /* autostop criteria */
1208 case 'b': /* Ringbuffer option */
1209 case 'c': /* Capture x packets */
1210 case 'f': /* capture filter */
1211 case 'g': /* enable group read access on file(s) */
1212 case 'i': /* Use interface x */
1213 case 'p': /* Don't capture in promiscuous mode */
1214 #ifdef HAVE_PCAP_REMOTE
1215 case 'A': /* Authentication */
1217 #ifdef HAVE_PCAP_CREATE
1218 case 'I': /* Capture in monitor mode, if available */
1220 case 's': /* Set the snapshot (capture) length */
1221 case 'w': /* Write to capture file x */
1222 case 'y': /* Set the pcap data link type */
1223 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1224 case 'B': /* Buffer size */
1225 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1227 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1232 capture_option_specified = TRUE;
1237 /* Configuration profile settings were already processed just ignore them this time*/
1239 case 'd': /* Decode as rule */
1240 if (!add_decode_as(optarg))
1243 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1244 case 'K': /* Kerberos keytab file */
1245 read_keytab_file(optarg);
1248 case 'D': /* Print a list of capture devices and exit */
1250 if_list = capture_interface_list(&err, &err_str);
1251 if (if_list == NULL) {
1253 case CANT_GET_INTERFACE_LIST:
1254 case DONT_HAVE_PCAP:
1255 cmdarg_err("%s", err_str);
1259 case NO_INTERFACES_FOUND:
1260 cmdarg_err("There are no interfaces on which a capture can be done");
1265 capture_opts_print_interfaces(if_list);
1266 free_interface_list(if_list);
1269 capture_option_specified = TRUE;
1275 output_fields_add(output_fields, optarg);
1279 if (!output_fields_set_option(output_fields, optarg)) {
1280 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1281 output_fields_list_options(stderr);
1286 out_file_type = wtap_short_string_to_file_type(optarg);
1287 if (out_file_type < 0) {
1288 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1289 list_capture_types();
1293 case 'W': /* Select extra information to save in our capture file */
1294 /* This is patterned after the -N flag which may not be the best idea. */
1295 if (strchr(optarg, 'n')) {
1296 out_file_name_res = TRUE;
1298 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1302 case 'H': /* Read address to name mappings from a hosts file */
1303 if (! add_hosts_file(optarg))
1305 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1308 out_file_name_res = TRUE;
1311 case 'h': /* Print help and exit */
1315 case 'l': /* "Line-buffer" standard output */
1316 /* This isn't line-buffering, strictly speaking, it's just
1317 flushing the standard output after the information for
1318 each packet is printed; however, that should be good
1319 enough for all the purposes to which "-l" is put (and
1320 is probably actually better for "-V", as it does fewer
1323 See the comment in "process_packet()" for an explanation of
1324 why we do that, and why we don't just use "setvbuf()" to
1325 make the standard output line-buffered (short version: in
1326 Windows, "line-buffered" is the same as "fully-buffered",
1327 and the output buffer is only flushed when it fills up). */
1328 line_buffered = TRUE;
1330 case 'L': /* Print list of link-layer types and exit */
1332 list_link_layer_types = TRUE;
1334 capture_option_specified = TRUE;
1338 case 'n': /* No name resolution */
1339 gbl_resolv_flags.mac_name = FALSE;
1340 gbl_resolv_flags.network_name = FALSE;
1341 gbl_resolv_flags.transport_name = FALSE;
1342 gbl_resolv_flags.concurrent_dns = FALSE;
1344 case 'N': /* Select what types of addresses/port #s to resolve */
1345 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1346 if (badopt != '\0') {
1347 cmdarg_err("-N specifies unknown resolving option '%c';",
1349 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1353 case 'o': /* Override preference from command line */
1354 switch (prefs_set_pref(optarg)) {
1359 case PREFS_SET_SYNTAX_ERR:
1360 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1364 case PREFS_SET_NO_SUCH_PREF:
1365 case PREFS_SET_OBSOLETE:
1366 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1371 case 'q': /* Quiet */
1374 case 'Q': /* Really quiet */
1376 really_quiet = TRUE;
1378 case 'r': /* Read capture file x */
1379 cf_name = g_strdup(optarg);
1381 case 'R': /* Read file filter */
1385 /* already processed; just ignore it now */
1387 case 'S': /* Set the line Separator to be printed between packets */
1388 separator = strdup(optarg);
1390 case 't': /* Time stamp type */
1391 if (strcmp(optarg, "r") == 0)
1392 timestamp_set_type(TS_RELATIVE);
1393 else if (strcmp(optarg, "a") == 0)
1394 timestamp_set_type(TS_ABSOLUTE);
1395 else if (strcmp(optarg, "ad") == 0)
1396 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1397 else if (strcmp(optarg, "d") == 0)
1398 timestamp_set_type(TS_DELTA);
1399 else if (strcmp(optarg, "dd") == 0)
1400 timestamp_set_type(TS_DELTA_DIS);
1401 else if (strcmp(optarg, "e") == 0)
1402 timestamp_set_type(TS_EPOCH);
1403 else if (strcmp(optarg, "u") == 0)
1404 timestamp_set_type(TS_UTC);
1405 else if (strcmp(optarg, "ud") == 0)
1406 timestamp_set_type(TS_UTC_WITH_DATE);
1408 cmdarg_err("Invalid time stamp type \"%s\"",
1410 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1411 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1415 case 'T': /* printing Type */
1416 if (strcmp(optarg, "text") == 0) {
1417 output_action = WRITE_TEXT;
1418 print_format = PR_FMT_TEXT;
1419 } else if (strcmp(optarg, "ps") == 0) {
1420 output_action = WRITE_TEXT;
1421 print_format = PR_FMT_PS;
1422 } else if (strcmp(optarg, "pdml") == 0) {
1423 output_action = WRITE_XML;
1424 print_details = TRUE; /* Need details */
1425 print_summary = FALSE; /* Don't allow summary */
1426 } else if (strcmp(optarg, "psml") == 0) {
1427 output_action = WRITE_XML;
1428 print_details = FALSE; /* Don't allow details */
1429 print_summary = TRUE; /* Need summary */
1430 } else if (strcmp(optarg, "fields") == 0) {
1431 output_action = WRITE_FIELDS;
1432 print_details = TRUE; /* Need full tree info */
1433 print_summary = FALSE; /* Don't allow summary */
1435 cmdarg_err("Invalid -T parameter.");
1436 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1440 case 'u': /* Seconds type */
1441 if (strcmp(optarg, "s") == 0)
1442 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1443 else if (strcmp(optarg, "hms") == 0)
1444 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1446 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1447 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1451 case 'v': /* Show version and exit */
1453 show_version(comp_info_str, runtime_info_str);
1454 g_string_free(comp_info_str, TRUE);
1455 g_string_free(runtime_info_str, TRUE);
1456 /* We don't really have to cleanup here, but it's a convenient way to test
1457 * start-up and shut-down of the epan library without any UI-specific
1458 * cruft getting in the way. Makes the results of running
1459 * $ ./tools/valgrind-wireshark -n
1460 * much more useful. */
1464 case 'O': /* Only output these protocols */
1465 /* already processed; just ignore it now */
1467 case 'V': /* Verbose */
1468 /* already processed; just ignore it now */
1470 case 'x': /* Print packet data in hex (and ASCII) */
1471 /* already processed; just ignore it now */
1476 /* We won't call the init function for the stat this soon
1477 as it would disallow MATE's fields (which are registered
1478 by the preferences set callback) from being used as
1479 part of a tap filter. Instead, we just add the argument
1480 to a list of stat arguments. */
1481 if (!process_stat_cmd_arg(optarg)) {
1482 if (strcmp("help", optarg)==0) {
1483 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1484 list_stat_cmd_args();
1487 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1488 cmdarg_err_cont(" -z argument must be one of :");
1489 list_stat_cmd_args();
1494 case '?': /* Bad flag - print usage message */
1497 list_capture_types();
1507 /* If we specified output fields, but not the output field type... */
1508 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1509 cmdarg_err("Output fields were specified with \"-e\", "
1510 "but \"-Tfields\" was not specified.");
1512 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1513 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1514 "specified with \"-e\".");
1519 /* If no capture filter or read filter has been specified, and there are
1520 still command-line arguments, treat them as the tokens of a capture
1521 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1522 flag was specified. */
1523 if (optind < argc) {
1524 if (cf_name != NULL) {
1525 if (rfilter != NULL) {
1526 cmdarg_err("Read filters were specified both with \"-R\" "
1527 "and with additional command-line arguments.");
1530 rfilter = get_args_as_string(argc, argv, optind);
1535 if (global_capture_opts.default_options.cfilter) {
1536 cmdarg_err("A default capture filter was specified both with \"-f\""
1537 " and with additional command-line arguments.");
1540 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1541 interface_options interface_opts;
1542 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1543 if (interface_opts.cfilter == NULL) {
1544 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1545 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1546 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1548 cmdarg_err("A capture filter was specified both with \"-f\""
1549 " and with additional command-line arguments.");
1553 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1555 capture_option_specified = TRUE;
1561 if (!global_capture_opts.saving_to_file) {
1562 /* We're not saving the capture to a file; if "-q" wasn't specified,
1563 we should print packet information */
1565 print_packet_info = TRUE;
1567 /* We're saving to a file; if we're writing to the standard output.
1568 and we'll also be writing dissected packets to the standard
1569 output, reject the request. At best, we could redirect that
1570 to the standard error; we *can't* write both to the standard
1571 output and have either of them be useful. */
1572 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1573 cmdarg_err("You can't write both raw packet data and dissected packets"
1574 " to the standard output.");
1579 /* We're not saving the capture to a file; if "-q" wasn't specified,
1580 we should print packet information */
1582 print_packet_info = TRUE;
1585 #ifndef HAVE_LIBPCAP
1586 if (capture_option_specified)
1587 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1594 /* We don't support capture filters when reading from a capture file
1595 (the BPF compiler doesn't support all link-layer types that we
1596 support in capture files we read). */
1598 if (cf_name != NULL) {
1599 if (global_capture_opts.default_options.cfilter) {
1600 cmdarg_err("Only read filters, not capture filters, "
1601 "can be specified when reading a capture file.");
1608 if (output_action != WRITE_TEXT) {
1609 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1614 if (output_only != NULL) {
1617 if (!print_details) {
1618 cmdarg_err("-O requires -V");
1622 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1623 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1624 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1629 if (list_link_layer_types) {
1630 /* We're supposed to list the link-layer types for an interface;
1631 did the user also specify a capture file to be read? */
1633 /* Yes - that's bogus. */
1634 cmdarg_err("You can't specify -L and a capture file to be read.");
1637 /* No - did they specify a ring buffer option? */
1638 if (global_capture_opts.multi_files_on) {
1639 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1645 * "-r" was specified, so we're reading a capture file.
1646 * Capture options don't apply here.
1648 if (global_capture_opts.multi_files_on) {
1649 cmdarg_err("Multiple capture files requested, but "
1650 "a capture isn't being done.");
1653 if (global_capture_opts.has_file_duration) {
1654 cmdarg_err("Switching capture files after a time interval was specified, but "
1655 "a capture isn't being done.");
1658 if (global_capture_opts.has_ring_num_files) {
1659 cmdarg_err("A ring buffer of capture files was specified, but "
1660 "a capture isn't being done.");
1663 if (global_capture_opts.has_autostop_files) {
1664 cmdarg_err("A maximum number of capture files was specified, but "
1665 "a capture isn't being done.");
1669 /* Note: TShark now allows the restriction of a _read_ file by packet count
1670 * and byte count as well as a write file. Other autostop options remain valid
1671 * only for a write file.
1673 if (global_capture_opts.has_autostop_duration) {
1674 cmdarg_err("A maximum capture time was specified, but "
1675 "a capture isn't being done.");
1680 * "-r" wasn't specified, so we're doing a live capture.
1682 if (global_capture_opts.saving_to_file) {
1683 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1685 /* When capturing, we only support writing pcap or pcap-ng format. */
1686 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1687 cmdarg_err("Live captures can only be saved in libpcap format.");
1690 if (global_capture_opts.multi_files_on) {
1691 /* Multiple-file mode doesn't work under certain conditions:
1692 a) it doesn't work if you're writing to the standard output;
1693 b) it doesn't work if you're writing to a pipe;
1695 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1696 cmdarg_err("Multiple capture files requested, but "
1697 "the capture is being written to the standard output.");
1700 if (global_capture_opts.output_to_pipe) {
1701 cmdarg_err("Multiple capture files requested, but "
1702 "the capture file is a pipe.");
1705 if (!global_capture_opts.has_autostop_filesize &&
1706 !global_capture_opts.has_file_duration) {
1707 cmdarg_err("Multiple capture files requested, but "
1708 "no maximum capture file size or duration was specified.");
1712 /* Currently, we don't support read filters when capturing
1713 and saving the packets. */
1714 if (rfilter != NULL) {
1715 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1719 /* They didn't specify a "-w" flag, so we won't be saving to a
1720 capture file. Check for options that only make sense if
1721 we're saving to a file. */
1722 if (global_capture_opts.has_autostop_filesize) {
1723 cmdarg_err("Maximum capture file size specified, but "
1724 "capture isn't being saved to a file.");
1727 if (global_capture_opts.multi_files_on) {
1728 cmdarg_err("Multiple capture files requested, but "
1729 "the capture isn't being saved to a file.");
1738 /* Start windows sockets */
1739 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1742 /* Notify all registered modules that have had any of their preferences
1743 changed either from one of the preferences file or from the command
1744 line that their preferences have changed. */
1747 /* At this point MATE will have registered its field array so we can
1748 have a tap filter with one of MATE's late-registered fields as part
1749 of the filter. We can now process all the "-z" arguments. */
1750 start_requested_stats();
1753 /* We currently don't support taps, or printing dissected packets,
1754 if we're writing to a pipe. */
1755 if (global_capture_opts.saving_to_file &&
1756 global_capture_opts.output_to_pipe) {
1757 if (tap_listeners_require_dissection()) {
1758 cmdarg_err("Taps aren't supported when saving to a pipe.");
1761 if (print_packet_info) {
1762 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1768 /* disabled protocols as per configuration file */
1769 if (gdp_path == NULL && dp_path == NULL) {
1770 set_disabled_protos_list();
1773 /* Build the column format array */
1774 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1777 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1778 capture_opts_trim_ring_num_files(&global_capture_opts);
1781 if (rfilter != NULL) {
1782 if (!dfilter_compile(rfilter, &rfcode)) {
1783 cmdarg_err("%s", dfilter_error_msg);
1785 #ifdef HAVE_PCAP_OPEN_DEAD
1789 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1791 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1793 " Note: That display filter code looks like a valid capture filter;");
1795 " maybe you mixed them up?");
1804 cfile.rfcode = rfcode;
1806 if (print_packet_info) {
1807 /* If we're printing as text or PostScript, we have
1808 to create a print stream. */
1809 if (output_action == WRITE_TEXT) {
1810 switch (print_format) {
1813 print_stream = print_stream_text_stdio_new(stdout);
1817 print_stream = print_stream_ps_stdio_new(stdout);
1821 g_assert_not_reached();
1826 /* We have to dissect each packet if:
1828 we're printing information about each packet;
1830 we're using a read filter on the packets;
1832 we're using any taps that need dissection. */
1833 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1837 * We're reading a capture file.
1841 * Immediately relinquish any special privileges we have; we must not
1842 * be allowed to read any capture files the user running TShark
1845 relinquish_special_privs_perm();
1846 print_current_user();
1848 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1853 /* Set timestamp precision; there should arguably be a command-line
1854 option to let the user set this. */
1855 switch(wtap_file_tsprecision(cfile.wth)) {
1856 case(WTAP_FILE_TSPREC_SEC):
1857 timestamp_set_precision(TS_PREC_AUTO_SEC);
1859 case(WTAP_FILE_TSPREC_DSEC):
1860 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1862 case(WTAP_FILE_TSPREC_CSEC):
1863 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1865 case(WTAP_FILE_TSPREC_MSEC):
1866 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1868 case(WTAP_FILE_TSPREC_USEC):
1869 timestamp_set_precision(TS_PREC_AUTO_USEC);
1871 case(WTAP_FILE_TSPREC_NSEC):
1872 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1875 g_assert_not_reached();
1878 /* Process the packets in the file */
1881 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1882 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1883 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1885 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1888 CATCH(OutOfMemoryError) {
1892 "Sorry, but TShark has to terminate now!\n"
1894 "Some infos / workarounds can be found at:\n"
1895 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1900 /* We still dump out the results of taps, etc., as we might have
1901 read some packets; however, we exit with an error status. */
1905 /* No capture file specified, so we're supposed to do a live capture
1906 (or get a list of link-layer types for a live capture device);
1907 do we have support for live captures? */
1909 /* trim the interface name and exit if that failed */
1910 exit_status = capture_opts_trim_iface(&global_capture_opts,
1911 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1912 if (exit_status != 0)
1915 /* if requested, list the link layer types and exit */
1916 if (list_link_layer_types) {
1919 /* Get the list of link-layer types for the capture devices. */
1920 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1921 interface_options interface_opts;
1922 if_capabilities_t *caps;
1924 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1925 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1927 cmdarg_err("%s", err_str);
1931 if (caps->data_link_types == NULL) {
1932 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1935 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1936 free_if_capabilities(caps);
1941 if (print_packet_info) {
1942 if (!write_preamble(NULL)) {
1943 show_print_file_io_error(errno);
1946 } else if (!quiet) {
1948 * We're not printing information for each packet, and the user
1949 * didn't ask us not to print a count of packets as they arrive,
1950 * so print that count so the user knows that packets are arriving.
1952 * XXX - what if the user wants to do a live capture, doesn't want
1953 * to save it to a file, doesn't want information printed for each
1954 * packet, does want some "-z" statistic, and wants packet counts
1955 * so they know whether they're seeing any packets?
1957 print_packet_counts = TRUE;
1960 /* For now, assume libpcap gives microsecond precision. */
1961 timestamp_set_precision(TS_PREC_AUTO_USEC);
1964 * XXX - this returns FALSE if an error occurred, but it also
1965 * returns FALSE if the capture stops because a time limit
1966 * was reached (and possibly other limits), so we can't assume
1967 * it means an error.
1969 * The capture code is a bit twisty, so it doesn't appear to
1970 * be an easy fix. We just ignore the return value for now.
1971 * Instead, pass on the exit status from the capture child.
1974 exit_status = global_capture_opts.fork_child_status;
1976 if (print_packet_info) {
1977 if (!write_finale()) {
1979 show_print_file_io_error(err);
1983 /* No - complain. */
1984 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1991 if (cfile.frames != NULL) {
1992 free_frame_data_sequence(cfile.frames);
1993 cfile.frames = NULL;
1996 draw_tap_listeners(TRUE);
1997 funnel_dump_all_text_windows();
2000 output_fields_free(output_fields);
2001 output_fields = NULL;
2006 /*#define USE_BROKEN_G_MAIN_LOOP*/
2008 #ifdef USE_BROKEN_G_MAIN_LOOP
2011 gboolean loop_running = FALSE;
2013 guint32 packet_count = 0;
2016 /* XXX - move to the right position / file */
2017 /* read from a pipe (callback) */
2018 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2020 typedef struct pipe_input_tag {
2024 pipe_input_cb_t input_cb;
2025 guint pipe_input_id;
2027 GMutex *callback_running;
2031 static pipe_input_t pipe_input;
2034 /* The timer has expired, see if there's stuff to read from the pipe,
2035 if so, do the callback */
2037 pipe_timer_cb(gpointer data)
2043 pipe_input_t *pipe_input_p = data;
2044 gint iterations = 0;
2046 g_mutex_lock (pipe_input_p->callback_running);
2048 /* try to read data from the pipe only 5 times, to avoid blocking */
2049 while(iterations < 5) {
2050 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2052 /* Oddly enough although Named pipes don't work on win9x,
2053 PeekNamedPipe does !!! */
2054 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2055 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2057 /* Get the child process exit status */
2058 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2061 /* If the Peek returned an error, or there are bytes to be read
2062 or the childwatcher thread has terminated then call the normal
2064 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2066 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2068 /* And call the real handler */
2069 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2070 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2071 /* pipe closed, return false so that the timer is stopped */
2072 g_mutex_unlock (pipe_input_p->callback_running);
2077 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2078 /* No data, stop now */
2085 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2087 g_mutex_unlock (pipe_input_p->callback_running);
2089 /* we didn't stopped the timer, so let it run */
2096 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2099 pipe_input.source = source;
2100 pipe_input.child_process = child_process;
2101 pipe_input.user_data = user_data;
2102 pipe_input.input_cb = input_cb;
2105 #if GLIB_CHECK_VERSION(2,31,0)
2106 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2107 g_mutex_init(pipe_input.callback_running);
2109 pipe_input.callback_running = g_mutex_new();
2111 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2112 do this but that doesn't cover all win32 platforms. GTK can do
2113 this but doesn't seem to work over processes. Attempt to do
2114 something similar here, start a timer and check for data on every
2116 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2117 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2128 GString *str = g_string_new("");
2129 #ifdef USE_TSHARK_SELECT
2133 struct sigaction action, oldaction;
2137 * XXX - dropping privileges is still required, until code cleanup is done
2139 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2140 * when it's done, we don't need special privileges to run tshark at all,
2141 * therefore we don't need to drop these privileges
2142 * The only thing we might want to keep is a warning if tshark is run as root,
2143 * as it's no longer necessary and potentially dangerous.
2145 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2146 * We've opened the capture device, so we shouldn't need any special
2147 * privileges any more; relinquish those privileges.
2149 * XXX - if we have saved set-user-ID support, we should give up those
2150 * privileges immediately, and then reclaim them long enough to get
2151 * a list of network interfaces and to open one, and then give them
2152 * up again, so that stuff we do while processing the argument list,
2153 * reading the user's preferences, loading and starting plugins
2154 * (especially *user* plugins), etc. is done with the user's privileges,
2155 * not special privileges.
2157 relinquish_special_privs_perm();
2158 print_current_user();
2160 /* Cleanup all data structures used for dissection. */
2161 cleanup_dissection();
2162 /* Initialize all data structures used for dissection. */
2166 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2167 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2169 /* Catch SIGINT and SIGTERM and, if we get either of them,
2170 clean up and exit. If SIGHUP isn't being ignored, catch
2171 it too and, if we get it, clean up and exit.
2173 We restart any read that was in progress, so that it doesn't
2174 disrupt reading from the sync pipe. The signal handler tells
2175 the capture child to finish; it will report that it finished,
2176 or will exit abnormally, so we'll stop reading from the sync
2177 pipe, pick up the exit status, and quit. */
2178 memset(&action, 0, sizeof(action));
2179 action.sa_handler = capture_cleanup;
2180 action.sa_flags = SA_RESTART;
2181 sigemptyset(&action.sa_mask);
2182 sigaction(SIGTERM, &action, NULL);
2183 sigaction(SIGINT, &action, NULL);
2184 sigaction(SIGHUP, NULL, &oldaction);
2185 if (oldaction.sa_handler == SIG_DFL)
2186 sigaction(SIGHUP, &action, NULL);
2189 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2190 quiet mode, report the number of packets we've captured.
2192 Again, restart any read that was in progress, so that it doesn't
2193 disrupt reading from the sync pipe. */
2194 action.sa_handler = report_counts_siginfo;
2195 action.sa_flags = SA_RESTART;
2196 sigemptyset(&action.sa_mask);
2197 sigaction(SIGINFO, &action, NULL);
2198 #endif /* SIGINFO */
2201 global_capture_opts.state = CAPTURE_PREPARING;
2203 /* Let the user know which interfaces were chosen. */
2204 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2205 interface_options interface_opts;
2207 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2208 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2209 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2210 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2213 if (global_capture_opts.ifaces->len < 2) {
2215 if (global_capture_opts.ifaces->len < 4) {
2217 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2218 interface_options interface_opts;
2220 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2222 if (global_capture_opts.ifaces->len > 2) {
2223 g_string_append_printf(str, ",");
2225 g_string_append_printf(str, " ");
2226 if (i == global_capture_opts.ifaces->len - 1) {
2227 g_string_append_printf(str, "and ");
2230 g_string_append_printf(str, "'%s'", interface_opts.descr);
2233 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2235 if (really_quiet == FALSE)
2236 fprintf(stderr, "Capturing on %s\n", str->str);
2238 g_string_free(str, TRUE);
2240 ret = sync_pipe_start(&global_capture_opts);
2245 /* the actual capture loop
2247 * XXX - glib doesn't seem to provide any event based loop handling.
2249 * XXX - for whatever reason,
2250 * calling g_main_loop_new() ends up in 100% cpu load.
2252 * But that doesn't matter: in UNIX we can use select() to find an input
2253 * source with something to do.
2255 * But that doesn't matter because we're in a CLI (that doesn't need to
2256 * update a GUI or something at the same time) so it's OK if we block
2257 * trying to read from the pipe.
2259 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2260 * wrong (but I leave it there in case I am...).
2263 #ifdef USE_TSHARK_SELECT
2265 FD_SET(pipe_input.source, &readfds);
2268 loop_running = TRUE;
2272 while (loop_running)
2274 #ifdef USE_TSHARK_SELECT
2275 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2281 } else if (ret == 1) {
2283 /* Call the real handler */
2284 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2285 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2288 #ifdef USE_TSHARK_SELECT
2293 CATCH(OutOfMemoryError) {
2297 "Sorry, but TShark has to terminate now!\n"
2299 "Some infos / workarounds can be found at:\n"
2300 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2308 /* XXX - move the call to main_window_update() out of capture_sync.c */
2309 /* dummy for capture_sync.c to make linker happy */
2310 void main_window_update(void)
2314 /* capture child detected an error */
2316 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2318 cmdarg_err("%s", error_msg);
2319 cmdarg_err_cont("%s", secondary_error_msg);
2323 /* capture child detected an capture filter related error */
2325 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2327 dfilter_t *rfcode = NULL;
2328 interface_options interface_opts;
2330 g_assert(i < capture_opts->ifaces->len);
2331 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2333 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2335 "Invalid capture filter \"%s\" for interface %s!\n"
2337 "That string looks like a valid display filter; however, it isn't a valid\n"
2338 "capture filter (%s).\n"
2340 "Note that display filters and capture filters don't have the same syntax,\n"
2341 "so you can't use most display filter expressions as capture filters.\n"
2343 "See the User's Guide for a description of the capture filter syntax.",
2344 interface_opts.cfilter, interface_opts.descr, error_message);
2345 dfilter_free(rfcode);
2348 "Invalid capture filter \"%s\" for interface %s!\n"
2350 "That string isn't a valid capture filter (%s).\n"
2351 "See the User's Guide for a description of the capture filter syntax.",
2352 interface_opts.cfilter, interface_opts.descr, error_message);
2357 /* capture child tells us we have a new (or the first) capture file */
2359 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2361 gboolean is_tempfile;
2364 if (capture_opts->state == CAPTURE_PREPARING) {
2365 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2367 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2369 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2371 /* free the old filename */
2372 if (capture_opts->save_file != NULL) {
2374 /* we start a new capture file, close the old one (if we had one before) */
2375 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2376 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2377 wtap_close(((capture_file *) capture_opts->cf)->wth);
2379 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2382 g_free(capture_opts->save_file);
2383 is_tempfile = FALSE;
2385 /* we didn't had a save_file before, must be a tempfile */
2389 /* save the new filename */
2390 capture_opts->save_file = g_strdup(new_file);
2392 /* if we are in real-time mode, open the new file now */
2393 if (do_dissection) {
2394 /* Attempt to open the capture file and set up to read from it. */
2395 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2399 /* Don't unlink (delete) the save file - leave it around,
2400 for debugging purposes. */
2401 g_free(capture_opts->save_file);
2402 capture_opts->save_file = NULL;
2407 capture_opts->state = CAPTURE_RUNNING;
2413 /* capture child tells us we have new packets to read */
2415 capture_input_new_packets(capture_options *capture_opts, int to_read)
2421 capture_file *cf = (capture_file *)capture_opts->cf;
2422 gboolean filtering_tap_listeners;
2427 * Prevent a SIGINFO handler from writing to the standard error while
2428 * we're doing so or writing to the standard output; instead, have it
2429 * just set a flag telling us to print that information when we're done.
2432 #endif /* SIGINFO */
2434 /* Do we have any tap listeners with filters? */
2435 filtering_tap_listeners = have_filtering_tap_listeners();
2437 /* Get the union of the flags for all tap listeners. */
2438 tap_flags = union_of_tap_listener_flags();
2440 if (do_dissection) {
2441 while (to_read-- && cf->wth) {
2442 wtap_cleareof(cf->wth);
2443 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2445 /* read from file failed, tell the capture child to stop */
2446 sync_pipe_stop(capture_opts);
2447 wtap_close(cf->wth);
2450 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2451 wtap_buf_ptr(cf->wth),
2452 filtering_tap_listeners, tap_flags);
2455 /* packet successfully read and gone through the "Read Filter" */
2461 * Dumpcap's doing all the work; we're not doing any dissection.
2462 * Count all the packets it wrote.
2464 packet_count += to_read;
2467 if (print_packet_counts) {
2468 /* We're printing packet counts. */
2469 if (packet_count != 0) {
2470 fprintf(stderr, "\r%u ", packet_count);
2471 /* stderr could be line buffered */
2478 * Allow SIGINFO handlers to write.
2483 * If a SIGINFO handler asked us to write out capture counts, do so.
2487 #endif /* SIGINFO */
2493 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2494 /* Report the count only if we aren't printing a packet count
2495 as packets arrive. */
2496 fprintf(stderr, "%u packet%s captured\n", packet_count,
2497 plurality(packet_count, "", "s"));
2500 infoprint = FALSE; /* we just reported it */
2501 #endif /* SIGINFO */
2506 report_counts_siginfo(int signum _U_)
2508 int sav_errno = errno;
2509 /* If we've been told to delay printing, just set a flag asking
2510 that we print counts (if we're supposed to), otherwise print
2511 the count of packets captured (if we're supposed to). */
2518 #endif /* SIGINFO */
2521 /* capture child detected any packet drops? */
2523 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2525 if (print_packet_counts) {
2526 /* We're printing packet counts to stderr.
2527 Send a newline so that we move to the line after the packet count. */
2528 fprintf(stderr, "\n");
2532 /* We're printing packet counts to stderr.
2533 Send a newline so that we move to the line after the packet count. */
2534 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2540 * Capture child closed its side of the pipe, report any error and
2541 * do the required cleanup.
2544 capture_input_closed(capture_options *capture_opts, gchar *msg)
2546 capture_file *cf = (capture_file *) capture_opts->cf;
2549 fprintf(stderr, "tshark: %s\n", msg);
2553 if (cf != NULL && cf->wth != NULL) {
2554 wtap_close(cf->wth);
2555 if (cf->is_tempfile) {
2556 ws_unlink(cf->filename);
2559 #ifdef USE_BROKEN_G_MAIN_LOOP
2560 /*g_main_loop_quit(loop);*/
2563 loop_running = FALSE;
2572 capture_cleanup(DWORD ctrltype _U_)
2574 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2575 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2576 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2577 like SIGTERM at least when the machine's shutting down.
2579 For now, we handle them all as indications that we should clean up
2580 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2583 We must return TRUE so that no other handler - such as one that would
2584 terminate the process - gets called.
2586 XXX - for some reason, typing ^C to TShark, if you run this in
2587 a Cygwin console window in at least some versions of Cygwin,
2588 causes TShark to terminate immediately; this routine gets
2589 called, but the main loop doesn't get a chance to run and
2590 exit cleanly, at least if this is compiled with Microsoft Visual
2591 C++ (i.e., it's a property of the Cygwin console window or Bash;
2592 it happens if TShark is not built with Cygwin - for all I know,
2593 building it with Cygwin may make the problem go away). */
2595 /* tell the capture child to stop */
2596 sync_pipe_stop(&global_capture_opts);
2598 /* don't stop our own loop already here, otherwise status messages and
2599 * cleanup wouldn't be done properly. The child will indicate the stop of
2600 * everything by calling capture_input_closed() later */
2606 capture_cleanup(int signum _U_)
2608 /* tell the capture child to stop */
2609 sync_pipe_stop(&global_capture_opts);
2611 /* don't stop our own loop already here, otherwise status messages and
2612 * cleanup wouldn't be done properly. The child will indicate the stop of
2613 * everything by calling capture_input_closed() later */
2616 #endif /* HAVE_LIBPCAP */
2619 process_packet_first_pass(capture_file *cf,
2620 gint64 offset, struct wtap_pkthdr *whdr,
2625 gboolean create_proto_tree = FALSE;
2629 /* The frame number of this packet is one more than the count of
2630 frames in this packet. */
2631 framenum = cf->count + 1;
2633 /* If we're not running a display filter and we're not printing any
2634 packet information, we don't need to do a dissection. This means
2635 that all packets can be marked as 'passed'. */
2638 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2640 /* If we're going to print packet information, or we're going to
2641 run a read filter, or we're going to process taps, set up to
2642 do a dissection and do so. */
2643 if (do_dissection) {
2644 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2645 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2646 /* Grab any resolved addresses */
2647 host_name_lookup_process();
2649 /* If we're going to be applying a read filter, we'll need to
2650 create a protocol tree against which to apply the filter. */
2652 create_proto_tree = TRUE;
2654 /* We're not going to display the protocol tree on this pass,
2655 so it's not going to be "visible". */
2656 epan_dissect_init(&edt, create_proto_tree, FALSE);
2658 /* If we're running a read filter, prime the epan_dissect_t with that
2661 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2663 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2664 &first_ts, prev_dis, prev_cap);
2666 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2668 /* Run the read filter if we have one. */
2670 passed = dfilter_apply_edt(cf->rfcode, &edt);
2674 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2675 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2678 /* if we don't add it to the frame_data_sequence, clean it up right now
2680 frame_data_destroy(&fdlocal);
2681 /* TODO, bug #8160 */
2683 prev_cap_frame = fdlocal;
2684 prev_cap = &prev_cap_frame;
2689 epan_dissect_cleanup(&edt);
2695 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2696 struct wtap_pkthdr *phdr, const guchar *pd,
2697 gboolean filtering_tap_listeners, guint tap_flags)
2699 gboolean create_proto_tree;
2704 /* If we're not running a display filter and we're not printing any
2705 packet information, we don't need to do a dissection. This means
2706 that all packets can be marked as 'passed'. */
2709 /* If we're going to print packet information, or we're going to
2710 run a read filter, or we're going to process taps, set up to
2711 do a dissection and do so. */
2712 if (do_dissection) {
2713 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2714 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2715 /* Grab any resolved addresses */
2716 host_name_lookup_process();
2718 if (cf->rfcode || print_details || filtering_tap_listeners ||
2719 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2720 create_proto_tree = TRUE;
2722 create_proto_tree = FALSE;
2724 /* The protocol tree will be "visible", i.e., printed, only if we're
2725 printing packet details, which is true if we're printing stuff
2726 ("print_packet_info" is true) and we're in verbose mode
2727 ("packet_details" is true). */
2728 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2730 /* If we're running a read filter, prime the epan_dissect_t with that
2733 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2735 col_custom_prime_edt(&edt, &cf->cinfo);
2737 /* We only need the columns if either
2738 1) some tap needs the columns
2740 2) we're printing packet info but we're *not* verbose; in verbose
2741 mode, we print the protocol tree, not the protocol summary.
2743 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2748 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2750 /* Run the read filter if we have one. */
2752 passed = dfilter_apply_edt(cf->rfcode, &edt);
2756 /* Process this packet. */
2757 if (print_packet_info) {
2758 /* We're printing packet information; print the information for
2761 print_packet(cf, &edt);
2763 print_packet(cf, NULL);
2765 /* The ANSI C standard does not appear to *require* that a line-buffered
2766 stream be flushed to the host environment whenever a newline is
2767 written, it just says that, on such a stream, characters "are
2768 intended to be transmitted to or from the host environment as a
2769 block when a new-line character is encountered".
2771 The Visual C++ 6.0 C implementation doesn't do what is intended;
2772 even if you set a stream to be line-buffered, it still doesn't
2773 flush the buffer at the end of every line.
2775 So, if the "-l" flag was specified, we flush the standard output
2776 at the end of a packet. This will do the right thing if we're
2777 printing packet summary lines, and, as we print the entire protocol
2778 tree for a single packet without waiting for anything to happen,
2779 it should be as good as line-buffered mode if we're printing
2780 protocol trees. (The whole reason for the "-l" flag in either
2781 tcpdump or TShark is to allow the output of a live capture to
2782 be piped to a program or script and to have that script see the
2783 information for the packet as soon as it's printed, rather than
2784 having to wait until a standard I/O buffer fills up. */
2788 if (ferror(stdout)) {
2789 show_print_file_io_error(errno);
2795 if (do_dissection) {
2796 epan_dissect_cleanup(&edt);
2802 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2803 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2806 int snapshot_length;
2810 gchar *err_info = NULL;
2812 char *save_file_string = NULL;
2813 gboolean filtering_tap_listeners;
2815 wtapng_section_t *shb_hdr;
2816 wtapng_iface_descriptions_t *idb_inf;
2819 shb_hdr = wtap_file_get_shb_info(cf->wth);
2820 idb_inf = wtap_file_get_idb_info(cf->wth);
2821 #ifdef PCAP_NG_DEFAULT
2822 if (idb_inf->number_of_interfaces > 0) {
2823 linktype = WTAP_ENCAP_PER_PACKET;
2825 linktype = wtap_file_encap(cf->wth);
2828 linktype = wtap_file_encap(cf->wth);
2830 if (save_file != NULL) {
2831 /* Get a string that describes what we're writing to */
2832 save_file_string = output_file_description(save_file);
2834 /* Set up to write to the capture file. */
2835 snapshot_length = wtap_snapshot_length(cf->wth);
2836 if (snapshot_length == 0) {
2837 /* Snapshot length of input file not known. */
2838 snapshot_length = WTAP_MAX_PACKET_SIZE;
2840 /* If we don't have an application name add Tshark */
2841 if (shb_hdr->shb_user_appl == NULL) {
2842 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2843 shb_hdr->shb_user_appl = appname;
2846 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2847 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2853 /* We couldn't set up to write to the capture file. */
2856 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2857 cmdarg_err("Capture files can't be written in that format.");
2860 case WTAP_ERR_UNSUPPORTED_ENCAP:
2861 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2862 cmdarg_err("The capture file being read can't be written as a "
2863 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2866 case WTAP_ERR_CANT_OPEN:
2867 cmdarg_err("The %s couldn't be created for some "
2868 "unknown reason.", save_file_string);
2871 case WTAP_ERR_SHORT_WRITE:
2872 cmdarg_err("A full header couldn't be written to the %s.",
2877 cmdarg_err("The %s could not be created: %s.", save_file_string,
2878 wtap_strerror(err));
2884 if (print_packet_info) {
2885 if (!write_preamble(cf)) {
2887 show_print_file_io_error(err);
2894 if (pdh && out_file_name_res) {
2895 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2896 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2897 wtap_file_type_short_string(out_file_type));
2901 /* Do we have any tap listeners with filters? */
2902 filtering_tap_listeners = have_filtering_tap_listeners();
2904 /* Get the union of the flags for all tap listeners. */
2905 tap_flags = union_of_tap_listener_flags();
2907 if (perform_two_pass_analysis) {
2909 int old_max_packet_count = max_packet_count;
2911 /* Allocate a frame_data_sequence for all the frames. */
2912 cf->frames = new_frame_data_sequence();
2914 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2915 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2916 wtap_buf_ptr(cf->wth))) {
2917 /* Stop reading if we have the maximum number of packets;
2918 * When the -c option has not been used, max_packet_count
2919 * starts at 0, which practically means, never stop reading.
2920 * (unless we roll over max_packet_count ?)
2922 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2923 err = 0; /* This is not an error */
2929 /* Close the sequential I/O side, to free up memory it requires. */
2930 wtap_sequential_close(cf->wth);
2932 /* Allow the protocol dissectors to free up memory that they
2933 * don't need after the sequential run-through of the packets. */
2934 postseq_cleanup_all_protocols();
2936 max_packet_count = old_max_packet_count;
2938 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2939 fdata = frame_data_sequence_find(cf->frames, framenum);
2940 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2941 cf->pd, fdata->cap_len, &err, &err_info)) {
2942 if (process_packet_second_pass(cf, fdata,
2944 filtering_tap_listeners, tap_flags)) {
2945 /* Either there's no read filtering or this packet passed the
2946 filter, so, if we're writing to a capture file, write
2949 if (!wtap_dump(pdh, &cf->phdr, cf->pd, &err)) {
2950 /* Error writing to a capture file */
2953 case WTAP_ERR_UNSUPPORTED_ENCAP:
2955 * This is a problem with the particular frame we're writing;
2956 * note that, and give the frame number.
2958 * XXX - framenum is not necessarily the frame number in
2959 * the input file if there was a read filter.
2962 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2963 framenum, cf->filename,
2964 wtap_file_type_short_string(out_file_type));
2968 show_capture_file_io_error(save_file, err, FALSE);
2971 wtap_dump_close(pdh, &err);
2976 /* Stop reading if we have the maximum number of packets;
2977 * When the -c option has not been used, max_packet_count
2978 * starts at 0, which practically means, never stop reading.
2979 * (unless we roll over max_packet_count ?)
2981 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2982 err = 0; /* This is not an error */
2991 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2994 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2995 wtap_buf_ptr(cf->wth),
2996 filtering_tap_listeners, tap_flags)) {
2997 /* Either there's no read filtering or this packet passed the
2998 filter, so, if we're writing to a capture file, write
3001 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3002 /* Error writing to a capture file */
3005 case WTAP_ERR_UNSUPPORTED_ENCAP:
3007 * This is a problem with the particular frame we're writing;
3008 * note that, and give the frame number.
3011 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3012 framenum, cf->filename,
3013 wtap_file_type_short_string(out_file_type));
3017 show_capture_file_io_error(save_file, err, FALSE);
3020 wtap_dump_close(pdh, &err);
3025 /* Stop reading if we have the maximum number of packets;
3026 * When the -c option has not been used, max_packet_count
3027 * starts at 0, which practically means, never stop reading.
3028 * (unless we roll over max_packet_count ?)
3030 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3031 err = 0; /* This is not an error */
3040 * Print a message noting that the read failed somewhere along the line.
3042 * If we're printing packet data, and the standard output and error are
3043 * going to the same place, flush the standard output, so everything
3044 * buffered up is written, and then print a newline to the standard error
3045 * before printing the error message, to separate it from the packet
3046 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3047 * the _fstat() documentation at Microsoft doesn't indicate whether
3048 * st_ino is even supported.)
3051 if (print_packet_info) {
3052 struct stat stat_stdout, stat_stderr;
3054 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3055 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3056 stat_stdout.st_ino == stat_stderr.st_ino) {
3058 fprintf(stderr, "\n");
3065 case WTAP_ERR_UNSUPPORTED:
3066 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3067 cf->filename, err_info);
3071 case WTAP_ERR_UNSUPPORTED_ENCAP:
3072 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3073 cf->filename, err_info);
3077 case WTAP_ERR_CANT_READ:
3078 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3082 case WTAP_ERR_SHORT_READ:
3083 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3087 case WTAP_ERR_BAD_FILE:
3088 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3089 cf->filename, err_info);
3093 case WTAP_ERR_DECOMPRESS:
3094 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3095 "(%s)", cf->filename, err_info);
3099 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3100 cf->filename, wtap_strerror(err));
3103 if (save_file != NULL) {
3104 /* Now close the capture file. */
3105 if (!wtap_dump_close(pdh, &err))
3106 show_capture_file_io_error(save_file, err, TRUE);
3109 if (save_file != NULL) {
3110 /* Now close the capture file. */
3111 if (!wtap_dump_close(pdh, &err))
3112 show_capture_file_io_error(save_file, err, TRUE);
3114 if (print_packet_info) {
3115 if (!write_finale()) {
3117 show_print_file_io_error(err);
3124 wtap_close(cf->wth);
3127 g_free(save_file_string);
3134 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3136 gboolean filtering_tap_listeners, guint tap_flags)
3139 gboolean create_proto_tree;
3144 /* Count this packet. */
3147 /* If we're not running a display filter and we're not printing any
3148 packet information, we don't need to do a dissection. This means
3149 that all packets can be marked as 'passed'. */
3152 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3154 /* If we're going to print packet information, or we're going to
3155 run a read filter, or we're going to process taps, set up to
3156 do a dissection and do so. */
3157 if (do_dissection) {
3158 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3159 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3160 /* Grab any resolved addresses */
3161 host_name_lookup_process();
3163 if (cf->rfcode || print_details || filtering_tap_listeners ||
3164 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3165 create_proto_tree = TRUE;
3167 create_proto_tree = FALSE;
3169 /* The protocol tree will be "visible", i.e., printed, only if we're
3170 printing packet details, which is true if we're printing stuff
3171 ("print_packet_info" is true) and we're in verbose mode
3172 ("packet_details" is true). */
3173 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3175 /* If we're running a read filter, prime the epan_dissect_t with that
3178 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3180 col_custom_prime_edt(&edt, &cf->cinfo);
3182 /* We only need the columns if either
3183 1) some tap needs the columns
3185 2) we're printing packet info but we're *not* verbose; in verbose
3186 mode, we print the protocol tree, not the protocol summary.
3188 3) there is a column mapped as an individual field */
3189 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3194 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3195 &first_ts, prev_dis, prev_cap);
3197 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3199 /* Run the read filter if we have one. */
3201 passed = dfilter_apply_edt(cf->rfcode, &edt);
3205 frame_data_set_after_dissect(&fdata, &cum_bytes);
3207 /* Process this packet. */
3208 if (print_packet_info) {
3209 /* We're printing packet information; print the information for
3212 print_packet(cf, &edt);
3214 print_packet(cf, NULL);
3216 /* The ANSI C standard does not appear to *require* that a line-buffered
3217 stream be flushed to the host environment whenever a newline is
3218 written, it just says that, on such a stream, characters "are
3219 intended to be transmitted to or from the host environment as a
3220 block when a new-line character is encountered".
3222 The Visual C++ 6.0 C implementation doesn't do what is intended;
3223 even if you set a stream to be line-buffered, it still doesn't
3224 flush the buffer at the end of every line.
3226 So, if the "-l" flag was specified, we flush the standard output
3227 at the end of a packet. This will do the right thing if we're
3228 printing packet summary lines, and, as we print the entire protocol
3229 tree for a single packet without waiting for anything to happen,
3230 it should be as good as line-buffered mode if we're printing
3231 protocol trees. (The whole reason for the "-l" flag in either
3232 tcpdump or TShark is to allow the output of a live capture to
3233 be piped to a program or script and to have that script see the
3234 information for the packet as soon as it's printed, rather than
3235 having to wait until a standard I/O buffer fills up. */
3239 if (ferror(stdout)) {
3240 show_print_file_io_error(errno);
3245 /* this must be set after print_packet() [bug #8160] */
3246 prev_dis_frame = fdata;
3247 prev_dis = &prev_dis_frame;
3250 prev_cap_frame = fdata;
3251 prev_cap = &prev_cap_frame;
3253 if (do_dissection) {
3254 epan_dissect_cleanup(&edt);
3255 frame_data_destroy(&fdata);
3261 write_preamble(capture_file *cf)
3263 switch (output_action) {
3266 return print_preamble(print_stream, cf ? cf->filename : NULL);
3270 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3272 write_psml_preamble(stdout);
3273 return !ferror(stdout);
3276 write_fields_preamble(output_fields, stdout);
3277 return !ferror(stdout);
3280 g_assert_not_reached();
3286 get_line_buf(size_t len)
3288 static char *line_bufp = NULL;
3289 static size_t line_buf_len = 256;
3290 size_t new_line_buf_len;
3292 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3293 new_line_buf_len *= 2)
3295 if (line_bufp == NULL) {
3296 line_buf_len = new_line_buf_len;
3297 line_bufp = (char *)g_malloc(line_buf_len + 1);
3299 if (new_line_buf_len > line_buf_len) {
3300 line_buf_len = new_line_buf_len;
3301 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3308 print_columns(capture_file *cf)
3315 line_bufp = get_line_buf(256);
3318 for (i = 0; i < cf->cinfo.num_cols; i++) {
3319 /* Skip columns not marked as visible. */
3320 if (!get_column_visible(i))
3322 switch (cf->cinfo.col_fmt[i]) {
3326 * Don't print this if we're doing a live capture from a network
3327 * interface - if we're doing a live capture, you won't be
3328 * able to look at the capture in the future (it's not being
3329 * saved anywhere), so the frame numbers are unlikely to be
3332 * (XXX - it might be nice to be able to save and print at
3333 * the same time, sort of like an "Update list of packets
3334 * in real time" capture in Wireshark.)
3336 if (global_capture_opts.ifaces->len > 0)
3339 column_len = strlen(cf->cinfo.col_data[i]);
3342 line_bufp = get_line_buf(buf_offset + column_len);
3343 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3349 case COL_ABS_DATE_TIME:
3351 case COL_UTC_DATE_TIME: /* XXX - wider */
3352 column_len = strlen(cf->cinfo.col_data[i]);
3353 if (column_len < 10)
3355 line_bufp = get_line_buf(buf_offset + column_len);
3356 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3362 case COL_DEF_DL_SRC:
3363 case COL_RES_DL_SRC:
3364 case COL_UNRES_DL_SRC:
3365 case COL_DEF_NET_SRC:
3366 case COL_RES_NET_SRC:
3367 case COL_UNRES_NET_SRC:
3368 column_len = strlen(cf->cinfo.col_data[i]);
3369 if (column_len < 12)
3371 line_bufp = get_line_buf(buf_offset + column_len);
3372 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3378 case COL_DEF_DL_DST:
3379 case COL_RES_DL_DST:
3380 case COL_UNRES_DL_DST:
3381 case COL_DEF_NET_DST:
3382 case COL_RES_NET_DST:
3383 case COL_UNRES_NET_DST:
3384 column_len = strlen(cf->cinfo.col_data[i]);
3385 if (column_len < 12)
3387 line_bufp = get_line_buf(buf_offset + column_len);
3388 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3392 column_len = strlen(cf->cinfo.col_data[i]);
3393 line_bufp = get_line_buf(buf_offset + column_len);
3394 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3397 buf_offset += column_len;
3398 if (i != cf->cinfo.num_cols - 1) {
3400 * This isn't the last column, so we need to print a
3401 * separator between this column and the next.
3403 * If we printed a network source and are printing a
3404 * network destination of the same type next, separate
3405 * them with " -> "; if we printed a network destination
3406 * and are printing a network source of the same type
3407 * next, separate them with " <- "; otherwise separate them
3410 * We add enough space to the buffer for " <- " or " -> ",
3411 * even if we're only adding " ".
3413 line_bufp = get_line_buf(buf_offset + 4);
3414 switch (cf->cinfo.col_fmt[i]) {
3419 switch (cf->cinfo.col_fmt[i + 1]) {
3424 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3429 g_strlcat(line_bufp + buf_offset, " ", 5);
3435 case COL_DEF_DL_SRC:
3436 case COL_RES_DL_SRC:
3437 case COL_UNRES_DL_SRC:
3438 switch (cf->cinfo.col_fmt[i + 1]) {
3440 case COL_DEF_DL_DST:
3441 case COL_RES_DL_DST:
3442 case COL_UNRES_DL_DST:
3443 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3448 g_strlcat(line_bufp + buf_offset, " ", 5);
3454 case COL_DEF_NET_SRC:
3455 case COL_RES_NET_SRC:
3456 case COL_UNRES_NET_SRC:
3457 switch (cf->cinfo.col_fmt[i + 1]) {
3459 case COL_DEF_NET_DST:
3460 case COL_RES_NET_DST:
3461 case COL_UNRES_NET_DST:
3462 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3467 g_strlcat(line_bufp + buf_offset, " ", 5);
3476 switch (cf->cinfo.col_fmt[i + 1]) {
3481 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3486 g_strlcat(line_bufp + buf_offset, " ", 5);
3492 case COL_DEF_DL_DST:
3493 case COL_RES_DL_DST:
3494 case COL_UNRES_DL_DST:
3495 switch (cf->cinfo.col_fmt[i + 1]) {
3497 case COL_DEF_DL_SRC:
3498 case COL_RES_DL_SRC:
3499 case COL_UNRES_DL_SRC:
3500 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3505 g_strlcat(line_bufp + buf_offset, " ", 5);
3511 case COL_DEF_NET_DST:
3512 case COL_RES_NET_DST:
3513 case COL_UNRES_NET_DST:
3514 switch (cf->cinfo.col_fmt[i + 1]) {
3516 case COL_DEF_NET_SRC:
3517 case COL_RES_NET_SRC:
3518 case COL_UNRES_NET_SRC:
3519 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3524 g_strlcat(line_bufp + buf_offset, " ", 5);
3531 g_strlcat(line_bufp + buf_offset, " ", 5);
3537 return print_line(print_stream, 0, line_bufp);
3541 print_packet(capture_file *cf, epan_dissect_t *edt)
3543 print_args_t print_args;
3545 if (print_summary || output_fields_has_cols(output_fields)) {
3546 /* Just fill in the columns. */
3547 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3549 if (print_summary) {
3550 /* Now print them. */
3551 switch (output_action) {
3554 if (!print_columns(cf))
3559 proto_tree_write_psml(edt, stdout);
3560 return !ferror(stdout);
3561 case WRITE_FIELDS: /*No non-verbose "fields" format */
3562 g_assert_not_reached();
3567 if (print_details) {
3568 /* Print the information in the protocol tree. */
3569 switch (output_action) {
3572 /* Only initialize the fields that are actually used in proto_tree_print.
3573 * This is particularly important for .range, as that's heap memory which
3574 * we would otherwise have to g_free().
3575 print_args.to_file = TRUE;
3576 print_args.format = print_format;
3577 print_args.print_summary = print_summary;
3578 print_args.print_formfeed = FALSE;
3579 packet_range_init(&print_args.range, &cfile);
3581 print_args.print_hex = print_hex;
3582 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3584 if (!proto_tree_print(&print_args, edt, print_stream))
3587 if (!print_line(print_stream, 0, separator))
3593 proto_tree_write_pdml(edt, stdout);
3595 return !ferror(stdout);
3597 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3599 return !ferror(stdout);
3603 if (print_summary || print_details) {
3604 if (!print_line(print_stream, 0, ""))
3607 if (!print_hex_data(print_stream, edt))
3609 if (!print_line(print_stream, 0, separator))
3618 switch (output_action) {
3621 return print_finale(print_stream);
3625 write_pdml_finale(stdout);
3627 write_psml_finale(stdout);
3628 return !ferror(stdout);
3631 write_fields_finale(output_fields, stdout);
3632 return !ferror(stdout);
3635 g_assert_not_reached();
3641 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3645 char err_msg[2048+1];
3647 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3651 /* The open succeeded. Fill in the information for this file. */
3653 /* Cleanup all data structures used for dissection. */
3654 cleanup_dissection();
3655 /* Initialize all data structures used for dissection. */
3659 cf->f_datalen = 0; /* not used, but set it anyway */
3661 /* Set the file name because we need it to set the follow stream filter.
3662 XXX - is that still true? We need it for other reasons, though,
3664 cf->filename = g_strdup(fname);
3666 /* Indicate whether it's a permanent or temporary file. */
3667 cf->is_tempfile = is_tempfile;
3669 /* No user changes yet. */
3670 cf->unsaved_changes = FALSE;
3672 cf->cd_t = wtap_file_type(cf->wth);
3674 cf->drops_known = FALSE;
3676 cf->snap = wtap_snapshot_length(cf->wth);
3677 if (cf->snap == 0) {
3678 /* Snapshot length not known. */
3679 cf->has_snap = FALSE;
3680 cf->snap = WTAP_MAX_PACKET_SIZE;
3682 cf->has_snap = TRUE;
3683 nstime_set_zero(&cf->elapsed_time);
3684 nstime_set_unset(&first_ts);
3688 cf->state = FILE_READ_IN_PROGRESS;
3690 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3691 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3696 g_snprintf(err_msg, sizeof err_msg,
3697 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3698 cmdarg_err("%s", err_msg);
3703 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3705 char *save_file_string;
3707 save_file_string = output_file_description(fname);
3712 cmdarg_err("Not all the packets could be written to the %s because there is "
3713 "no space left on the file system.",
3719 cmdarg_err("Not all the packets could be written to the %s because you are "
3720 "too close to, or over your disk quota.",
3725 case WTAP_ERR_CANT_CLOSE:
3726 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3730 case WTAP_ERR_SHORT_WRITE:
3731 cmdarg_err("Not all the packets could be written to the %s.",
3737 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3738 wtap_strerror(err));
3740 cmdarg_err("An error occurred while writing to the %s: %s.",
3741 save_file_string, wtap_strerror(err));
3745 g_free(save_file_string);
3749 show_print_file_io_error(int err)
3754 cmdarg_err("Not all the packets could be printed because there is "
3755 "no space left on the file system.");
3760 cmdarg_err("Not all the packets could be printed because you are "
3761 "too close to, or over your disk quota.");
3766 cmdarg_err("An error occurred while printing packets: %s.",
3773 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3777 static char errmsg_errno[1024+1];
3780 /* Wiretap error. */
3783 case WTAP_ERR_NOT_REGULAR_FILE:
3784 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3787 case WTAP_ERR_RANDOM_OPEN_PIPE:
3788 /* Seen only when opening a capture file for reading. */
3789 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3792 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3793 /* Seen only when opening a capture file for reading. */
3794 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3797 case WTAP_ERR_UNSUPPORTED:
3798 /* Seen only when opening a capture file for reading. */
3799 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3800 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3803 errmsg = errmsg_errno;
3806 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3807 /* Seen only when opening a capture file for writing. */
3808 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3809 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3810 "written to a pipe.", wtap_file_type_short_string(file_type));
3811 errmsg = errmsg_errno;
3814 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3815 /* Seen only when opening a capture file for writing. */
3816 errmsg = "TShark doesn't support writing capture files in that format.";
3819 case WTAP_ERR_UNSUPPORTED_ENCAP:
3821 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3822 "TShark can't save this capture as a \"%s\" file.",
3823 wtap_file_type_short_string(file_type));
3825 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3826 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3830 errmsg = errmsg_errno;
3833 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3835 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3836 "TShark can't save this capture as a \"%s\" file.",
3837 wtap_file_type_short_string(file_type));
3838 errmsg = errmsg_errno;
3840 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3843 case WTAP_ERR_BAD_FILE:
3844 /* Seen only when opening a capture file for reading. */
3845 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3846 "The file \"%%s\" appears to be damaged or corrupt.\n"
3849 errmsg = errmsg_errno;
3852 case WTAP_ERR_CANT_OPEN:
3854 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3856 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3859 case WTAP_ERR_SHORT_READ:
3860 errmsg = "The file \"%s\" appears to have been cut short"
3861 " in the middle of a packet or other data.";
3864 case WTAP_ERR_SHORT_WRITE:
3865 errmsg = "A full header couldn't be written to the file \"%s\".";
3868 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3869 errmsg = "This file type cannot be written as a compressed file.";
3872 case WTAP_ERR_DECOMPRESS:
3873 /* Seen only when opening a capture file for reading. */
3874 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3875 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3878 errmsg = errmsg_errno;
3882 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3883 "The file \"%%s\" could not be %s: %s.",
3884 for_writing ? "created" : "opened",
3885 wtap_strerror(err));
3886 errmsg = errmsg_errno;
3890 errmsg = file_open_error_message(err, for_writing);
3895 * Open/create errors are reported with an console message in TShark.
3898 open_failure_message(const char *filename, int err, gboolean for_writing)
3900 fprintf(stderr, "tshark: ");
3901 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3902 fprintf(stderr, "\n");
3907 * General errors are reported with an console message in TShark.
3910 failure_message(const char *msg_format, va_list ap)
3912 fprintf(stderr, "tshark: ");
3913 vfprintf(stderr, msg_format, ap);
3914 fprintf(stderr, "\n");
3918 * Read errors are reported with an console message in TShark.
3921 read_failure_message(const char *filename, int err)
3923 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3924 filename, g_strerror(err));
3928 * Write errors are reported with an console message in TShark.
3931 write_failure_message(const char *filename, int err)
3933 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3934 filename, g_strerror(err));
3938 * Print to the standard error. This is a command-line tool, so there's
3939 * no need to pop up a console.
3942 vfprintf_stderr(const char *fmt, va_list ap)
3944 vfprintf(stderr, fmt, ap);
3948 fprintf_stderr(const char *fmt, ...)
3953 vfprintf_stderr(fmt, ap);
3958 * Report an error in command-line arguments.
3961 cmdarg_err(const char *fmt, ...)
3966 failure_message(fmt, ap);
3971 * Report additional information for an error in command-line arguments.
3974 cmdarg_err_cont(const char *fmt, ...)
3979 vfprintf(stderr, fmt, ap);
3980 fprintf(stderr, "\n");
3986 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3991 * indent-tabs-mode: nil
3994 * vi: set shiftwidth=2 tabstop=8 expandtab:
3995 * :indentSize=2:tabSize=8:noTabs=true: