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_malloc(sizeof(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: 1MB)\n");
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 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1483 cmdarg_err_cont(" -z argument must be one of :");
1484 list_stat_cmd_args();
1489 case '?': /* Bad flag - print usage message */
1492 list_capture_types();
1502 /* If we specified output fields, but not the output field type... */
1503 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1504 cmdarg_err("Output fields were specified with \"-e\", "
1505 "but \"-Tfields\" was not specified.");
1507 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1508 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1509 "specified with \"-e\".");
1514 /* If no capture filter or read filter has been specified, and there are
1515 still command-line arguments, treat them as the tokens of a capture
1516 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1517 flag was specified. */
1518 if (optind < argc) {
1519 if (cf_name != NULL) {
1520 if (rfilter != NULL) {
1521 cmdarg_err("Read filters were specified both with \"-R\" "
1522 "and with additional command-line arguments.");
1525 rfilter = get_args_as_string(argc, argv, optind);
1530 if (global_capture_opts.default_options.cfilter) {
1531 cmdarg_err("A default capture filter was specified both with \"-f\""
1532 " and with additional command-line arguments.");
1535 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1536 interface_options interface_opts;
1537 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1538 if (interface_opts.cfilter == NULL) {
1539 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1540 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1541 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1543 cmdarg_err("A capture filter was specified both with \"-f\""
1544 " and with additional command-line arguments.");
1548 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1550 capture_option_specified = TRUE;
1556 if (!global_capture_opts.saving_to_file) {
1557 /* We're not saving the capture to a file; if "-q" wasn't specified,
1558 we should print packet information */
1560 print_packet_info = TRUE;
1562 /* We're saving to a file; if we're writing to the standard output.
1563 and we'll also be writing dissected packets to the standard
1564 output, reject the request. At best, we could redirect that
1565 to the standard error; we *can't* write both to the standard
1566 output and have either of them be useful. */
1567 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1568 cmdarg_err("You can't write both raw packet data and dissected packets"
1569 " to the standard output.");
1574 /* We're not saving the capture to a file; if "-q" wasn't specified,
1575 we should print packet information */
1577 print_packet_info = TRUE;
1580 #ifndef HAVE_LIBPCAP
1581 if (capture_option_specified)
1582 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1589 /* We don't support capture filters when reading from a capture file
1590 (the BPF compiler doesn't support all link-layer types that we
1591 support in capture files we read). */
1593 if (cf_name != NULL) {
1594 if (global_capture_opts.default_options.cfilter) {
1595 cmdarg_err("Only read filters, not capture filters, "
1596 "can be specified when reading a capture file.");
1603 if (output_action != WRITE_TEXT) {
1604 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1609 if (output_only != NULL) {
1612 if (!print_details) {
1613 cmdarg_err("-O requires -V");
1617 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1618 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1619 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1624 if (list_link_layer_types) {
1625 /* We're supposed to list the link-layer types for an interface;
1626 did the user also specify a capture file to be read? */
1628 /* Yes - that's bogus. */
1629 cmdarg_err("You can't specify -L and a capture file to be read.");
1632 /* No - did they specify a ring buffer option? */
1633 if (global_capture_opts.multi_files_on) {
1634 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1640 * "-r" was specified, so we're reading a capture file.
1641 * Capture options don't apply here.
1643 if (global_capture_opts.multi_files_on) {
1644 cmdarg_err("Multiple capture files requested, but "
1645 "a capture isn't being done.");
1648 if (global_capture_opts.has_file_duration) {
1649 cmdarg_err("Switching capture files after a time interval was specified, but "
1650 "a capture isn't being done.");
1653 if (global_capture_opts.has_ring_num_files) {
1654 cmdarg_err("A ring buffer of capture files was specified, but "
1655 "a capture isn't being done.");
1658 if (global_capture_opts.has_autostop_files) {
1659 cmdarg_err("A maximum number of capture files was specified, but "
1660 "a capture isn't being done.");
1664 /* Note: TShark now allows the restriction of a _read_ file by packet count
1665 * and byte count as well as a write file. Other autostop options remain valid
1666 * only for a write file.
1668 if (global_capture_opts.has_autostop_duration) {
1669 cmdarg_err("A maximum capture time was specified, but "
1670 "a capture isn't being done.");
1675 * "-r" wasn't specified, so we're doing a live capture.
1677 if (global_capture_opts.saving_to_file) {
1678 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1680 /* When capturing, we only support writing pcap or pcap-ng format. */
1681 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1682 cmdarg_err("Live captures can only be saved in libpcap format.");
1685 if (global_capture_opts.multi_files_on) {
1686 /* Multiple-file mode doesn't work under certain conditions:
1687 a) it doesn't work if you're writing to the standard output;
1688 b) it doesn't work if you're writing to a pipe;
1690 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1691 cmdarg_err("Multiple capture files requested, but "
1692 "the capture is being written to the standard output.");
1695 if (global_capture_opts.output_to_pipe) {
1696 cmdarg_err("Multiple capture files requested, but "
1697 "the capture file is a pipe.");
1700 if (!global_capture_opts.has_autostop_filesize &&
1701 !global_capture_opts.has_file_duration) {
1702 cmdarg_err("Multiple capture files requested, but "
1703 "no maximum capture file size or duration was specified.");
1707 /* Currently, we don't support read filters when capturing
1708 and saving the packets. */
1709 if (rfilter != NULL) {
1710 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1714 /* They didn't specify a "-w" flag, so we won't be saving to a
1715 capture file. Check for options that only make sense if
1716 we're saving to a file. */
1717 if (global_capture_opts.has_autostop_filesize) {
1718 cmdarg_err("Maximum capture file size specified, but "
1719 "capture isn't being saved to a file.");
1722 if (global_capture_opts.multi_files_on) {
1723 cmdarg_err("Multiple capture files requested, but "
1724 "the capture isn't being saved to a file.");
1733 /* Start windows sockets */
1734 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1737 /* Notify all registered modules that have had any of their preferences
1738 changed either from one of the preferences file or from the command
1739 line that their preferences have changed. */
1742 /* At this point MATE will have registered its field array so we can
1743 have a tap filter with one of MATE's late-registered fields as part
1744 of the filter. We can now process all the "-z" arguments. */
1745 start_requested_stats();
1748 /* We currently don't support taps, or printing dissected packets,
1749 if we're writing to a pipe. */
1750 if (global_capture_opts.saving_to_file &&
1751 global_capture_opts.output_to_pipe) {
1752 if (tap_listeners_require_dissection()) {
1753 cmdarg_err("Taps aren't supported when saving to a pipe.");
1756 if (print_packet_info) {
1757 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1763 /* disabled protocols as per configuration file */
1764 if (gdp_path == NULL && dp_path == NULL) {
1765 set_disabled_protos_list();
1768 /* Build the column format array */
1769 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1772 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1773 capture_opts_trim_ring_num_files(&global_capture_opts);
1776 if (rfilter != NULL) {
1777 if (!dfilter_compile(rfilter, &rfcode)) {
1778 cmdarg_err("%s", dfilter_error_msg);
1780 #ifdef HAVE_PCAP_OPEN_DEAD
1784 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1786 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1788 " Note: That display filter code looks like a valid capture filter;");
1790 " maybe you mixed them up?");
1799 cfile.rfcode = rfcode;
1801 if (print_packet_info) {
1802 /* If we're printing as text or PostScript, we have
1803 to create a print stream. */
1804 if (output_action == WRITE_TEXT) {
1805 switch (print_format) {
1808 print_stream = print_stream_text_stdio_new(stdout);
1812 print_stream = print_stream_ps_stdio_new(stdout);
1816 g_assert_not_reached();
1821 /* We have to dissect each packet if:
1823 we're printing information about each packet;
1825 we're using a read filter on the packets;
1827 we're using any taps that need dissection. */
1828 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1832 * We're reading a capture file.
1836 * Immediately relinquish any special privileges we have; we must not
1837 * be allowed to read any capture files the user running TShark
1840 relinquish_special_privs_perm();
1841 print_current_user();
1843 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1848 /* Set timestamp precision; there should arguably be a command-line
1849 option to let the user set this. */
1850 switch(wtap_file_tsprecision(cfile.wth)) {
1851 case(WTAP_FILE_TSPREC_SEC):
1852 timestamp_set_precision(TS_PREC_AUTO_SEC);
1854 case(WTAP_FILE_TSPREC_DSEC):
1855 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1857 case(WTAP_FILE_TSPREC_CSEC):
1858 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1860 case(WTAP_FILE_TSPREC_MSEC):
1861 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1863 case(WTAP_FILE_TSPREC_USEC):
1864 timestamp_set_precision(TS_PREC_AUTO_USEC);
1866 case(WTAP_FILE_TSPREC_NSEC):
1867 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1870 g_assert_not_reached();
1873 /* Process the packets in the file */
1876 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1877 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1878 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1880 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1883 CATCH(OutOfMemoryError) {
1887 "Sorry, but TShark has to terminate now!\n"
1889 "Some infos / workarounds can be found at:\n"
1890 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1895 /* We still dump out the results of taps, etc., as we might have
1896 read some packets; however, we exit with an error status. */
1900 /* No capture file specified, so we're supposed to do a live capture
1901 (or get a list of link-layer types for a live capture device);
1902 do we have support for live captures? */
1904 /* trim the interface name and exit if that failed */
1905 exit_status = capture_opts_trim_iface(&global_capture_opts,
1906 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1907 if (exit_status != 0)
1910 /* if requested, list the link layer types and exit */
1911 if (list_link_layer_types) {
1914 /* Get the list of link-layer types for the capture devices. */
1915 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1916 interface_options interface_opts;
1917 if_capabilities_t *caps;
1919 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1920 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1922 cmdarg_err("%s", err_str);
1926 if (caps->data_link_types == NULL) {
1927 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1930 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1931 free_if_capabilities(caps);
1936 if (print_packet_info) {
1937 if (!write_preamble(NULL)) {
1938 show_print_file_io_error(errno);
1941 } else if (!quiet) {
1943 * We're not printing information for each packet, and the user
1944 * didn't ask us not to print a count of packets as they arrive,
1945 * so print that count so the user knows that packets are arriving.
1947 * XXX - what if the user wants to do a live capture, doesn't want
1948 * to save it to a file, doesn't want information printed for each
1949 * packet, does want some "-z" statistic, and wants packet counts
1950 * so they know whether they're seeing any packets?
1952 print_packet_counts = TRUE;
1955 /* For now, assume libpcap gives microsecond precision. */
1956 timestamp_set_precision(TS_PREC_AUTO_USEC);
1959 * XXX - this returns FALSE if an error occurred, but it also
1960 * returns FALSE if the capture stops because a time limit
1961 * was reached (and possibly other limits), so we can't assume
1962 * it means an error.
1964 * The capture code is a bit twisty, so it doesn't appear to
1965 * be an easy fix. We just ignore the return value for now.
1966 * Instead, pass on the exit status from the capture child.
1969 exit_status = global_capture_opts.fork_child_status;
1971 if (print_packet_info) {
1972 if (!write_finale()) {
1974 show_print_file_io_error(err);
1978 /* No - complain. */
1979 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1986 if (cfile.frames != NULL) {
1987 free_frame_data_sequence(cfile.frames);
1988 cfile.frames = NULL;
1991 draw_tap_listeners(TRUE);
1992 funnel_dump_all_text_windows();
1995 output_fields_free(output_fields);
1996 output_fields = NULL;
2001 /*#define USE_BROKEN_G_MAIN_LOOP*/
2003 #ifdef USE_BROKEN_G_MAIN_LOOP
2006 gboolean loop_running = FALSE;
2008 guint32 packet_count = 0;
2011 /* XXX - move to the right position / file */
2012 /* read from a pipe (callback) */
2013 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2015 typedef struct pipe_input_tag {
2019 pipe_input_cb_t input_cb;
2020 guint pipe_input_id;
2022 GMutex *callback_running;
2026 static pipe_input_t pipe_input;
2029 /* The timer has expired, see if there's stuff to read from the pipe,
2030 if so, do the callback */
2032 pipe_timer_cb(gpointer data)
2038 pipe_input_t *pipe_input_p = data;
2039 gint iterations = 0;
2041 g_mutex_lock (pipe_input_p->callback_running);
2043 /* try to read data from the pipe only 5 times, to avoid blocking */
2044 while(iterations < 5) {
2045 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2047 /* Oddly enough although Named pipes don't work on win9x,
2048 PeekNamedPipe does !!! */
2049 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2050 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2052 /* Get the child process exit status */
2053 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2056 /* If the Peek returned an error, or there are bytes to be read
2057 or the childwatcher thread has terminated then call the normal
2059 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2061 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2063 /* And call the real handler */
2064 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2065 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2066 /* pipe closed, return false so that the timer is stopped */
2067 g_mutex_unlock (pipe_input_p->callback_running);
2072 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2073 /* No data, stop now */
2080 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2082 g_mutex_unlock (pipe_input_p->callback_running);
2084 /* we didn't stopped the timer, so let it run */
2091 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2094 pipe_input.source = source;
2095 pipe_input.child_process = child_process;
2096 pipe_input.user_data = user_data;
2097 pipe_input.input_cb = input_cb;
2100 #if GLIB_CHECK_VERSION(2,31,0)
2101 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2102 g_mutex_init(pipe_input.callback_running);
2104 pipe_input.callback_running = g_mutex_new();
2106 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2107 do this but that doesn't cover all win32 platforms. GTK can do
2108 this but doesn't seem to work over processes. Attempt to do
2109 something similar here, start a timer and check for data on every
2111 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2112 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2123 GString *str = g_string_new("");
2124 #ifdef USE_TSHARK_SELECT
2128 struct sigaction action, oldaction;
2132 * XXX - dropping privileges is still required, until code cleanup is done
2134 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2135 * when it's done, we don't need special privileges to run tshark at all,
2136 * therefore we don't need to drop these privileges
2137 * The only thing we might want to keep is a warning if tshark is run as root,
2138 * as it's no longer necessary and potentially dangerous.
2140 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2141 * We've opened the capture device, so we shouldn't need any special
2142 * privileges any more; relinquish those privileges.
2144 * XXX - if we have saved set-user-ID support, we should give up those
2145 * privileges immediately, and then reclaim them long enough to get
2146 * a list of network interfaces and to open one, and then give them
2147 * up again, so that stuff we do while processing the argument list,
2148 * reading the user's preferences, loading and starting plugins
2149 * (especially *user* plugins), etc. is done with the user's privileges,
2150 * not special privileges.
2152 relinquish_special_privs_perm();
2153 print_current_user();
2155 /* Cleanup all data structures used for dissection. */
2156 cleanup_dissection();
2157 /* Initialize all data structures used for dissection. */
2161 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2162 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2164 /* Catch SIGINT and SIGTERM and, if we get either of them,
2165 clean up and exit. If SIGHUP isn't being ignored, catch
2166 it too and, if we get it, clean up and exit.
2168 We restart any read that was in progress, so that it doesn't
2169 disrupt reading from the sync pipe. The signal handler tells
2170 the capture child to finish; it will report that it finished,
2171 or will exit abnormally, so we'll stop reading from the sync
2172 pipe, pick up the exit status, and quit. */
2173 memset(&action, 0, sizeof(action));
2174 action.sa_handler = capture_cleanup;
2175 action.sa_flags = SA_RESTART;
2176 sigemptyset(&action.sa_mask);
2177 sigaction(SIGTERM, &action, NULL);
2178 sigaction(SIGINT, &action, NULL);
2179 sigaction(SIGHUP, NULL, &oldaction);
2180 if (oldaction.sa_handler == SIG_DFL)
2181 sigaction(SIGHUP, &action, NULL);
2184 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2185 quiet mode, report the number of packets we've captured.
2187 Again, restart any read that was in progress, so that it doesn't
2188 disrupt reading from the sync pipe. */
2189 action.sa_handler = report_counts_siginfo;
2190 action.sa_flags = SA_RESTART;
2191 sigemptyset(&action.sa_mask);
2192 sigaction(SIGINFO, &action, NULL);
2193 #endif /* SIGINFO */
2196 global_capture_opts.state = CAPTURE_PREPARING;
2198 /* Let the user know which interfaces were chosen. */
2199 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2200 interface_options interface_opts;
2202 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2203 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2204 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2205 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2208 if (global_capture_opts.ifaces->len < 2) {
2210 if (global_capture_opts.ifaces->len < 4) {
2212 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2213 interface_options interface_opts;
2215 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2217 if (global_capture_opts.ifaces->len > 2) {
2218 g_string_append_printf(str, ",");
2220 g_string_append_printf(str, " ");
2221 if (i == global_capture_opts.ifaces->len - 1) {
2222 g_string_append_printf(str, "and ");
2225 g_string_append_printf(str, "'%s'", interface_opts.descr);
2228 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2230 if (really_quiet == FALSE)
2231 fprintf(stderr, "Capturing on %s\n", str->str);
2233 g_string_free(str, TRUE);
2235 ret = sync_pipe_start(&global_capture_opts);
2240 /* the actual capture loop
2242 * XXX - glib doesn't seem to provide any event based loop handling.
2244 * XXX - for whatever reason,
2245 * calling g_main_loop_new() ends up in 100% cpu load.
2247 * But that doesn't matter: in UNIX we can use select() to find an input
2248 * source with something to do.
2250 * But that doesn't matter because we're in a CLI (that doesn't need to
2251 * update a GUI or something at the same time) so it's OK if we block
2252 * trying to read from the pipe.
2254 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2255 * wrong (but I leave it there in case I am...).
2258 #ifdef USE_TSHARK_SELECT
2260 FD_SET(pipe_input.source, &readfds);
2263 loop_running = TRUE;
2267 while (loop_running)
2269 #ifdef USE_TSHARK_SELECT
2270 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2276 } else if (ret == 1) {
2278 /* Call the real handler */
2279 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2280 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2283 #ifdef USE_TSHARK_SELECT
2288 CATCH(OutOfMemoryError) {
2292 "Sorry, but TShark has to terminate now!\n"
2294 "Some infos / workarounds can be found at:\n"
2295 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2303 /* XXX - move the call to main_window_update() out of capture_sync.c */
2304 /* dummy for capture_sync.c to make linker happy */
2305 void main_window_update(void)
2309 /* capture child detected an error */
2311 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2313 cmdarg_err("%s", error_msg);
2314 cmdarg_err_cont("%s", secondary_error_msg);
2318 /* capture child detected an capture filter related error */
2320 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2322 dfilter_t *rfcode = NULL;
2323 interface_options interface_opts;
2325 g_assert(i < capture_opts->ifaces->len);
2326 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2328 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2330 "Invalid capture filter \"%s\" for interface %s!\n"
2332 "That string looks like a valid display filter; however, it isn't a valid\n"
2333 "capture filter (%s).\n"
2335 "Note that display filters and capture filters don't have the same syntax,\n"
2336 "so you can't use most display filter expressions as capture filters.\n"
2338 "See the User's Guide for a description of the capture filter syntax.",
2339 interface_opts.cfilter, interface_opts.descr, error_message);
2340 dfilter_free(rfcode);
2343 "Invalid capture filter \"%s\" for interface %s!\n"
2345 "That string isn't a valid capture filter (%s).\n"
2346 "See the User's Guide for a description of the capture filter syntax.",
2347 interface_opts.cfilter, interface_opts.descr, error_message);
2352 /* capture child tells us we have a new (or the first) capture file */
2354 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2356 gboolean is_tempfile;
2359 if (capture_opts->state == CAPTURE_PREPARING) {
2360 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2362 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2364 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2366 /* free the old filename */
2367 if (capture_opts->save_file != NULL) {
2369 /* we start a new capture file, close the old one (if we had one before) */
2370 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2371 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2372 wtap_close(((capture_file *) capture_opts->cf)->wth);
2374 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2377 g_free(capture_opts->save_file);
2378 is_tempfile = FALSE;
2380 /* we didn't had a save_file before, must be a tempfile */
2384 /* save the new filename */
2385 capture_opts->save_file = g_strdup(new_file);
2387 /* if we are in real-time mode, open the new file now */
2388 if (do_dissection) {
2389 /* Attempt to open the capture file and set up to read from it. */
2390 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2394 /* Don't unlink (delete) the save file - leave it around,
2395 for debugging purposes. */
2396 g_free(capture_opts->save_file);
2397 capture_opts->save_file = NULL;
2402 capture_opts->state = CAPTURE_RUNNING;
2408 /* capture child tells us we have new packets to read */
2410 capture_input_new_packets(capture_options *capture_opts, int to_read)
2416 capture_file *cf = capture_opts->cf;
2417 gboolean filtering_tap_listeners;
2422 * Prevent a SIGINFO handler from writing to the standard error while
2423 * we're doing so or writing to the standard output; instead, have it
2424 * just set a flag telling us to print that information when we're done.
2427 #endif /* SIGINFO */
2429 /* Do we have any tap listeners with filters? */
2430 filtering_tap_listeners = have_filtering_tap_listeners();
2432 /* Get the union of the flags for all tap listeners. */
2433 tap_flags = union_of_tap_listener_flags();
2435 if (do_dissection) {
2436 while (to_read-- && cf->wth) {
2437 wtap_cleareof(cf->wth);
2438 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2440 /* read from file failed, tell the capture child to stop */
2441 sync_pipe_stop(capture_opts);
2442 wtap_close(cf->wth);
2445 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2446 wtap_buf_ptr(cf->wth),
2447 filtering_tap_listeners, tap_flags);
2450 /* packet successfully read and gone through the "Read Filter" */
2456 * Dumpcap's doing all the work; we're not doing any dissection.
2457 * Count all the packets it wrote.
2459 packet_count += to_read;
2462 if (print_packet_counts) {
2463 /* We're printing packet counts. */
2464 if (packet_count != 0) {
2465 fprintf(stderr, "\r%u ", packet_count);
2466 /* stderr could be line buffered */
2473 * Allow SIGINFO handlers to write.
2478 * If a SIGINFO handler asked us to write out capture counts, do so.
2482 #endif /* SIGINFO */
2488 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2489 /* Report the count only if we aren't printing a packet count
2490 as packets arrive. */
2491 fprintf(stderr, "%u packet%s captured\n", packet_count,
2492 plurality(packet_count, "", "s"));
2495 infoprint = FALSE; /* we just reported it */
2496 #endif /* SIGINFO */
2501 report_counts_siginfo(int signum _U_)
2503 int sav_errno = errno;
2504 /* If we've been told to delay printing, just set a flag asking
2505 that we print counts (if we're supposed to), otherwise print
2506 the count of packets captured (if we're supposed to). */
2513 #endif /* SIGINFO */
2516 /* capture child detected any packet drops? */
2518 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2520 if (print_packet_counts) {
2521 /* We're printing packet counts to stderr.
2522 Send a newline so that we move to the line after the packet count. */
2523 fprintf(stderr, "\n");
2527 /* We're printing packet counts to stderr.
2528 Send a newline so that we move to the line after the packet count. */
2529 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2535 * Capture child closed its side of the pipe, report any error and
2536 * do the required cleanup.
2539 capture_input_closed(capture_options *capture_opts, gchar *msg)
2541 capture_file *cf = (capture_file *) capture_opts->cf;
2544 fprintf(stderr, "tshark: %s\n", msg);
2548 if (cf != NULL && cf->wth != NULL) {
2549 wtap_close(cf->wth);
2550 if (cf->is_tempfile) {
2551 ws_unlink(cf->filename);
2554 #ifdef USE_BROKEN_G_MAIN_LOOP
2555 /*g_main_loop_quit(loop);*/
2558 loop_running = FALSE;
2567 capture_cleanup(DWORD ctrltype _U_)
2569 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2570 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2571 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2572 like SIGTERM at least when the machine's shutting down.
2574 For now, we handle them all as indications that we should clean up
2575 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2578 We must return TRUE so that no other handler - such as one that would
2579 terminate the process - gets called.
2581 XXX - for some reason, typing ^C to TShark, if you run this in
2582 a Cygwin console window in at least some versions of Cygwin,
2583 causes TShark to terminate immediately; this routine gets
2584 called, but the main loop doesn't get a chance to run and
2585 exit cleanly, at least if this is compiled with Microsoft Visual
2586 C++ (i.e., it's a property of the Cygwin console window or Bash;
2587 it happens if TShark is not built with Cygwin - for all I know,
2588 building it with Cygwin may make the problem go away). */
2590 /* tell the capture child to stop */
2591 sync_pipe_stop(&global_capture_opts);
2593 /* don't stop our own loop already here, otherwise status messages and
2594 * cleanup wouldn't be done properly. The child will indicate the stop of
2595 * everything by calling capture_input_closed() later */
2601 capture_cleanup(int signum _U_)
2603 /* tell the capture child to stop */
2604 sync_pipe_stop(&global_capture_opts);
2606 /* don't stop our own loop already here, otherwise status messages and
2607 * cleanup wouldn't be done properly. The child will indicate the stop of
2608 * everything by calling capture_input_closed() later */
2611 #endif /* HAVE_LIBPCAP */
2614 process_packet_first_pass(capture_file *cf,
2615 gint64 offset, struct wtap_pkthdr *whdr,
2620 gboolean create_proto_tree = FALSE;
2624 /* The frame number of this packet is one more than the count of
2625 frames in this packet. */
2626 framenum = cf->count + 1;
2628 /* If we're not running a display filter and we're not printing any
2629 packet information, we don't need to do a dissection. This means
2630 that all packets can be marked as 'passed'. */
2633 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2635 /* If we're going to print packet information, or we're going to
2636 run a read filter, or we're going to process taps, set up to
2637 do a dissection and do so. */
2638 if (do_dissection) {
2639 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2640 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2641 /* Grab any resolved addresses */
2642 host_name_lookup_process();
2644 /* If we're going to be applying a read filter, we'll need to
2645 create a protocol tree against which to apply the filter. */
2647 create_proto_tree = TRUE;
2649 /* We're not going to display the protocol tree on this pass,
2650 so it's not going to be "visible". */
2651 epan_dissect_init(&edt, create_proto_tree, FALSE);
2653 /* If we're running a read filter, prime the epan_dissect_t with that
2656 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2658 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2659 &first_ts, prev_dis, prev_cap);
2661 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2663 /* Run the read filter if we have one. */
2665 passed = dfilter_apply_edt(cf->rfcode, &edt);
2669 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2670 prev_dis_frame = fdlocal;
2671 prev_dis = &prev_dis_frame;
2672 frame_data_sequence_add(cf->frames, &fdlocal);
2676 prev_cap_frame = fdlocal;
2677 prev_cap = &prev_cap_frame;
2680 epan_dissect_cleanup(&edt);
2686 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2687 struct wtap_pkthdr *phdr, const guchar *pd,
2688 gboolean filtering_tap_listeners, guint tap_flags)
2690 gboolean create_proto_tree;
2695 /* If we're not running a display filter and we're not printing any
2696 packet information, we don't need to do a dissection. This means
2697 that all packets can be marked as 'passed'. */
2700 /* If we're going to print packet information, or we're going to
2701 run a read filter, or we're going to process taps, set up to
2702 do a dissection and do so. */
2703 if (do_dissection) {
2704 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2705 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2706 /* Grab any resolved addresses */
2707 host_name_lookup_process();
2709 if (cf->rfcode || print_details || filtering_tap_listeners ||
2710 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2711 create_proto_tree = TRUE;
2713 create_proto_tree = FALSE;
2715 /* The protocol tree will be "visible", i.e., printed, only if we're
2716 printing packet details, which is true if we're printing stuff
2717 ("print_packet_info" is true) and we're in verbose mode
2718 ("packet_details" is true). */
2719 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2721 /* If we're running a read filter, prime the epan_dissect_t with that
2724 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2726 col_custom_prime_edt(&edt, &cf->cinfo);
2728 /* We only need the columns if either
2729 1) some tap needs the columns
2731 2) we're printing packet info but we're *not* verbose; in verbose
2732 mode, we print the protocol tree, not the protocol summary.
2734 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2739 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2741 /* Run the read filter if we have one. */
2743 passed = dfilter_apply_edt(cf->rfcode, &edt);
2747 /* Process this packet. */
2748 if (print_packet_info) {
2749 /* We're printing packet information; print the information for
2752 print_packet(cf, &edt);
2754 print_packet(cf, NULL);
2756 /* The ANSI C standard does not appear to *require* that a line-buffered
2757 stream be flushed to the host environment whenever a newline is
2758 written, it just says that, on such a stream, characters "are
2759 intended to be transmitted to or from the host environment as a
2760 block when a new-line character is encountered".
2762 The Visual C++ 6.0 C implementation doesn't do what is intended;
2763 even if you set a stream to be line-buffered, it still doesn't
2764 flush the buffer at the end of every line.
2766 So, if the "-l" flag was specified, we flush the standard output
2767 at the end of a packet. This will do the right thing if we're
2768 printing packet summary lines, and, as we print the entire protocol
2769 tree for a single packet without waiting for anything to happen,
2770 it should be as good as line-buffered mode if we're printing
2771 protocol trees. (The whole reason for the "-l" flag in either
2772 tcpdump or TShark is to allow the output of a live capture to
2773 be piped to a program or script and to have that script see the
2774 information for the packet as soon as it's printed, rather than
2775 having to wait until a standard I/O buffer fills up. */
2779 if (ferror(stdout)) {
2780 show_print_file_io_error(errno);
2786 if (do_dissection) {
2787 epan_dissect_cleanup(&edt);
2793 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2794 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2797 int snapshot_length;
2801 gchar *err_info = NULL;
2803 char *save_file_string = NULL;
2804 gboolean filtering_tap_listeners;
2806 wtapng_section_t *shb_hdr;
2807 wtapng_iface_descriptions_t *idb_inf;
2810 shb_hdr = wtap_file_get_shb_info(cf->wth);
2811 idb_inf = wtap_file_get_idb_info(cf->wth);
2812 #ifdef PCAP_NG_DEFAULT
2813 if (idb_inf->number_of_interfaces > 0) {
2814 linktype = WTAP_ENCAP_PER_PACKET;
2816 linktype = wtap_file_encap(cf->wth);
2819 linktype = wtap_file_encap(cf->wth);
2821 if (save_file != NULL) {
2822 /* Get a string that describes what we're writing to */
2823 save_file_string = output_file_description(save_file);
2825 /* Set up to write to the capture file. */
2826 snapshot_length = wtap_snapshot_length(cf->wth);
2827 if (snapshot_length == 0) {
2828 /* Snapshot length of input file not known. */
2829 snapshot_length = WTAP_MAX_PACKET_SIZE;
2831 /* If we don't have an application name add Tshark */
2832 if (shb_hdr->shb_user_appl == NULL) {
2833 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2834 shb_hdr->shb_user_appl = appname;
2837 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2838 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2844 /* We couldn't set up to write to the capture file. */
2847 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2848 cmdarg_err("Capture files can't be written in that format.");
2851 case WTAP_ERR_UNSUPPORTED_ENCAP:
2852 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2853 cmdarg_err("The capture file being read can't be written as a "
2854 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2857 case WTAP_ERR_CANT_OPEN:
2858 cmdarg_err("The %s couldn't be created for some "
2859 "unknown reason.", save_file_string);
2862 case WTAP_ERR_SHORT_WRITE:
2863 cmdarg_err("A full header couldn't be written to the %s.",
2868 cmdarg_err("The %s could not be created: %s.", save_file_string,
2869 wtap_strerror(err));
2875 if (print_packet_info) {
2876 if (!write_preamble(cf)) {
2878 show_print_file_io_error(err);
2885 if (pdh && out_file_name_res) {
2886 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2887 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2888 wtap_file_type_short_string(out_file_type));
2892 /* Do we have any tap listeners with filters? */
2893 filtering_tap_listeners = have_filtering_tap_listeners();
2895 /* Get the union of the flags for all tap listeners. */
2896 tap_flags = union_of_tap_listener_flags();
2898 if (perform_two_pass_analysis) {
2900 int old_max_packet_count = max_packet_count;
2902 /* Allocate a frame_data_sequence for all the frames. */
2903 cf->frames = new_frame_data_sequence();
2905 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2906 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2907 wtap_buf_ptr(cf->wth))) {
2908 /* Stop reading if we have the maximum number of packets;
2909 * When the -c option has not been used, max_packet_count
2910 * starts at 0, which practically means, never stop reading.
2911 * (unless we roll over max_packet_count ?)
2913 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2914 err = 0; /* This is not an error */
2920 /* Close the sequential I/O side, to free up memory it requires. */
2921 wtap_sequential_close(cf->wth);
2923 /* Allow the protocol dissectors to free up memory that they
2924 * don't need after the sequential run-through of the packets. */
2925 postseq_cleanup_all_protocols();
2927 max_packet_count = old_max_packet_count;
2929 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2930 fdata = frame_data_sequence_find(cf->frames, framenum);
2931 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2932 cf->pd, fdata->cap_len, &err, &err_info)) {
2933 if (process_packet_second_pass(cf, fdata,
2935 filtering_tap_listeners, tap_flags)) {
2936 /* Either there's no read filtering or this packet passed the
2937 filter, so, if we're writing to a capture file, write
2940 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2941 /* Error writing to a capture file */
2944 case WTAP_ERR_UNSUPPORTED_ENCAP:
2946 * This is a problem with the particular frame we're writing;
2947 * note that, and give the frame number.
2949 * XXX - framenum is not necessarily the frame number in
2950 * the input file if there was a read filter.
2953 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2954 framenum, cf->filename,
2955 wtap_file_type_short_string(out_file_type));
2959 show_capture_file_io_error(save_file, err, FALSE);
2962 wtap_dump_close(pdh, &err);
2967 /* Stop reading if we have the maximum number of packets;
2968 * When the -c option has not been used, max_packet_count
2969 * starts at 0, which practically means, never stop reading.
2970 * (unless we roll over max_packet_count ?)
2972 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2973 err = 0; /* This is not an error */
2982 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2985 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2986 wtap_buf_ptr(cf->wth),
2987 filtering_tap_listeners, tap_flags)) {
2988 /* Either there's no read filtering or this packet passed the
2989 filter, so, if we're writing to a capture file, write
2992 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2993 /* Error writing to a capture file */
2996 case WTAP_ERR_UNSUPPORTED_ENCAP:
2998 * This is a problem with the particular frame we're writing;
2999 * note that, and give the frame number.
3002 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3003 framenum, cf->filename,
3004 wtap_file_type_short_string(out_file_type));
3008 show_capture_file_io_error(save_file, err, FALSE);
3011 wtap_dump_close(pdh, &err);
3016 /* Stop reading if we have the maximum number of packets;
3017 * When the -c option has not been used, max_packet_count
3018 * starts at 0, which practically means, never stop reading.
3019 * (unless we roll over max_packet_count ?)
3021 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3022 err = 0; /* This is not an error */
3031 * Print a message noting that the read failed somewhere along the line.
3033 * If we're printing packet data, and the standard output and error are
3034 * going to the same place, flush the standard output, so everything
3035 * buffered up is written, and then print a newline to the standard error
3036 * before printing the error message, to separate it from the packet
3037 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3038 * the _fstat() documentation at Microsoft doesn't indicate whether
3039 * st_ino is even supported.)
3042 if (print_packet_info) {
3043 struct stat stat_stdout, stat_stderr;
3045 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3046 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3047 stat_stdout.st_ino == stat_stderr.st_ino) {
3049 fprintf(stderr, "\n");
3056 case WTAP_ERR_UNSUPPORTED:
3057 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3058 cf->filename, err_info);
3062 case WTAP_ERR_UNSUPPORTED_ENCAP:
3063 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3064 cf->filename, err_info);
3068 case WTAP_ERR_CANT_READ:
3069 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3073 case WTAP_ERR_SHORT_READ:
3074 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3078 case WTAP_ERR_BAD_FILE:
3079 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3080 cf->filename, err_info);
3084 case WTAP_ERR_DECOMPRESS:
3085 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3086 "(%s)", cf->filename, err_info);
3090 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3091 cf->filename, wtap_strerror(err));
3094 if (save_file != NULL) {
3095 /* Now close the capture file. */
3096 if (!wtap_dump_close(pdh, &err))
3097 show_capture_file_io_error(save_file, err, TRUE);
3100 if (save_file != NULL) {
3101 /* Now close the capture file. */
3102 if (!wtap_dump_close(pdh, &err))
3103 show_capture_file_io_error(save_file, err, TRUE);
3105 if (print_packet_info) {
3106 if (!write_finale()) {
3108 show_print_file_io_error(err);
3115 wtap_close(cf->wth);
3118 g_free(save_file_string);
3125 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3127 gboolean filtering_tap_listeners, guint tap_flags)
3130 gboolean create_proto_tree;
3135 /* Count this packet. */
3138 /* If we're not running a display filter and we're not printing any
3139 packet information, we don't need to do a dissection. This means
3140 that all packets can be marked as 'passed'. */
3143 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3145 /* If we're going to print packet information, or we're going to
3146 run a read filter, or we're going to process taps, set up to
3147 do a dissection and do so. */
3148 if (do_dissection) {
3149 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3150 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3151 /* Grab any resolved addresses */
3152 host_name_lookup_process();
3154 if (cf->rfcode || print_details || filtering_tap_listeners ||
3155 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3156 create_proto_tree = TRUE;
3158 create_proto_tree = FALSE;
3160 /* The protocol tree will be "visible", i.e., printed, only if we're
3161 printing packet details, which is true if we're printing stuff
3162 ("print_packet_info" is true) and we're in verbose mode
3163 ("packet_details" is true). */
3164 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3166 /* If we're running a read filter, prime the epan_dissect_t with that
3169 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3171 col_custom_prime_edt(&edt, &cf->cinfo);
3173 /* We only need the columns if either
3174 1) some tap needs the columns
3176 2) we're printing packet info but we're *not* verbose; in verbose
3177 mode, we print the protocol tree, not the protocol summary.
3179 3) there is a column mapped as an individual field */
3180 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3185 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3186 &first_ts, prev_dis, prev_cap);
3188 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3190 /* Run the read filter if we have one. */
3192 passed = dfilter_apply_edt(cf->rfcode, &edt);
3196 frame_data_set_after_dissect(&fdata, &cum_bytes);
3197 prev_dis_frame = fdata;
3198 prev_dis = &prev_dis_frame;
3200 /* Process this packet. */
3201 if (print_packet_info) {
3202 /* We're printing packet information; print the information for
3205 print_packet(cf, &edt);
3207 print_packet(cf, NULL);
3209 /* The ANSI C standard does not appear to *require* that a line-buffered
3210 stream be flushed to the host environment whenever a newline is
3211 written, it just says that, on such a stream, characters "are
3212 intended to be transmitted to or from the host environment as a
3213 block when a new-line character is encountered".
3215 The Visual C++ 6.0 C implementation doesn't do what is intended;
3216 even if you set a stream to be line-buffered, it still doesn't
3217 flush the buffer at the end of every line.
3219 So, if the "-l" flag was specified, we flush the standard output
3220 at the end of a packet. This will do the right thing if we're
3221 printing packet summary lines, and, as we print the entire protocol
3222 tree for a single packet without waiting for anything to happen,
3223 it should be as good as line-buffered mode if we're printing
3224 protocol trees. (The whole reason for the "-l" flag in either
3225 tcpdump or TShark is to allow the output of a live capture to
3226 be piped to a program or script and to have that script see the
3227 information for the packet as soon as it's printed, rather than
3228 having to wait until a standard I/O buffer fills up. */
3232 if (ferror(stdout)) {
3233 show_print_file_io_error(errno);
3239 prev_cap_frame = fdata;
3240 prev_cap = &prev_cap_frame;
3242 if (do_dissection) {
3243 epan_dissect_cleanup(&edt);
3244 frame_data_cleanup(&fdata);
3250 write_preamble(capture_file *cf)
3252 switch (output_action) {
3255 return print_preamble(print_stream, cf ? cf->filename : NULL);
3259 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3261 write_psml_preamble(stdout);
3262 return !ferror(stdout);
3265 write_fields_preamble(output_fields, stdout);
3266 return !ferror(stdout);
3269 g_assert_not_reached();
3275 get_line_buf(size_t len)
3277 static char *line_bufp = NULL;
3278 static size_t line_buf_len = 256;
3279 size_t new_line_buf_len;
3281 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3282 new_line_buf_len *= 2)
3284 if (line_bufp == NULL) {
3285 line_buf_len = new_line_buf_len;
3286 line_bufp = g_malloc(line_buf_len + 1);
3288 if (new_line_buf_len > line_buf_len) {
3289 line_buf_len = new_line_buf_len;
3290 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3297 print_columns(capture_file *cf)
3304 line_bufp = get_line_buf(256);
3307 for (i = 0; i < cf->cinfo.num_cols; i++) {
3308 /* Skip columns not marked as visible. */
3309 if (!get_column_visible(i))
3311 switch (cf->cinfo.col_fmt[i]) {
3315 * Don't print this if we're doing a live capture from a network
3316 * interface - if we're doing a live capture, you won't be
3317 * able to look at the capture in the future (it's not being
3318 * saved anywhere), so the frame numbers are unlikely to be
3321 * (XXX - it might be nice to be able to save and print at
3322 * the same time, sort of like an "Update list of packets
3323 * in real time" capture in Wireshark.)
3325 if (global_capture_opts.ifaces->len > 0)
3328 column_len = strlen(cf->cinfo.col_data[i]);
3331 line_bufp = get_line_buf(buf_offset + column_len);
3332 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3338 case COL_ABS_DATE_TIME:
3340 case COL_UTC_DATE_TIME: /* XXX - wider */
3341 column_len = strlen(cf->cinfo.col_data[i]);
3342 if (column_len < 10)
3344 line_bufp = get_line_buf(buf_offset + column_len);
3345 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3351 case COL_DEF_DL_SRC:
3352 case COL_RES_DL_SRC:
3353 case COL_UNRES_DL_SRC:
3354 case COL_DEF_NET_SRC:
3355 case COL_RES_NET_SRC:
3356 case COL_UNRES_NET_SRC:
3357 column_len = strlen(cf->cinfo.col_data[i]);
3358 if (column_len < 12)
3360 line_bufp = get_line_buf(buf_offset + column_len);
3361 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3367 case COL_DEF_DL_DST:
3368 case COL_RES_DL_DST:
3369 case COL_UNRES_DL_DST:
3370 case COL_DEF_NET_DST:
3371 case COL_RES_NET_DST:
3372 case COL_UNRES_NET_DST:
3373 column_len = strlen(cf->cinfo.col_data[i]);
3374 if (column_len < 12)
3376 line_bufp = get_line_buf(buf_offset + column_len);
3377 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3381 column_len = strlen(cf->cinfo.col_data[i]);
3382 line_bufp = get_line_buf(buf_offset + column_len);
3383 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3386 buf_offset += column_len;
3387 if (i != cf->cinfo.num_cols - 1) {
3389 * This isn't the last column, so we need to print a
3390 * separator between this column and the next.
3392 * If we printed a network source and are printing a
3393 * network destination of the same type next, separate
3394 * them with " -> "; if we printed a network destination
3395 * and are printing a network source of the same type
3396 * next, separate them with " <- "; otherwise separate them
3399 * We add enough space to the buffer for " <- " or " -> ",
3400 * even if we're only adding " ".
3402 line_bufp = get_line_buf(buf_offset + 4);
3403 switch (cf->cinfo.col_fmt[i]) {
3408 switch (cf->cinfo.col_fmt[i + 1]) {
3413 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3418 g_strlcat(line_bufp + buf_offset, " ", 5);
3424 case COL_DEF_DL_SRC:
3425 case COL_RES_DL_SRC:
3426 case COL_UNRES_DL_SRC:
3427 switch (cf->cinfo.col_fmt[i + 1]) {
3429 case COL_DEF_DL_DST:
3430 case COL_RES_DL_DST:
3431 case COL_UNRES_DL_DST:
3432 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3437 g_strlcat(line_bufp + buf_offset, " ", 5);
3443 case COL_DEF_NET_SRC:
3444 case COL_RES_NET_SRC:
3445 case COL_UNRES_NET_SRC:
3446 switch (cf->cinfo.col_fmt[i + 1]) {
3448 case COL_DEF_NET_DST:
3449 case COL_RES_NET_DST:
3450 case COL_UNRES_NET_DST:
3451 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3456 g_strlcat(line_bufp + buf_offset, " ", 5);
3465 switch (cf->cinfo.col_fmt[i + 1]) {
3470 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3475 g_strlcat(line_bufp + buf_offset, " ", 5);
3481 case COL_DEF_DL_DST:
3482 case COL_RES_DL_DST:
3483 case COL_UNRES_DL_DST:
3484 switch (cf->cinfo.col_fmt[i + 1]) {
3486 case COL_DEF_DL_SRC:
3487 case COL_RES_DL_SRC:
3488 case COL_UNRES_DL_SRC:
3489 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3494 g_strlcat(line_bufp + buf_offset, " ", 5);
3500 case COL_DEF_NET_DST:
3501 case COL_RES_NET_DST:
3502 case COL_UNRES_NET_DST:
3503 switch (cf->cinfo.col_fmt[i + 1]) {
3505 case COL_DEF_NET_SRC:
3506 case COL_RES_NET_SRC:
3507 case COL_UNRES_NET_SRC:
3508 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3513 g_strlcat(line_bufp + buf_offset, " ", 5);
3520 g_strlcat(line_bufp + buf_offset, " ", 5);
3526 return print_line(print_stream, 0, line_bufp);
3530 print_packet(capture_file *cf, epan_dissect_t *edt)
3532 print_args_t print_args;
3534 if (print_summary || output_fields_has_cols(output_fields)) {
3535 /* Just fill in the columns. */
3536 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3538 if (print_summary) {
3539 /* Now print them. */
3540 switch (output_action) {
3543 if (!print_columns(cf))
3548 proto_tree_write_psml(edt, stdout);
3549 return !ferror(stdout);
3550 case WRITE_FIELDS: /*No non-verbose "fields" format */
3551 g_assert_not_reached();
3556 if (print_details) {
3557 /* Print the information in the protocol tree. */
3558 switch (output_action) {
3561 /* Only initialize the fields that are actually used in proto_tree_print.
3562 * This is particularly important for .range, as that's heap memory which
3563 * we would otherwise have to g_free().
3564 print_args.to_file = TRUE;
3565 print_args.format = print_format;
3566 print_args.print_summary = print_summary;
3567 print_args.print_formfeed = FALSE;
3568 packet_range_init(&print_args.range, &cfile);
3570 print_args.print_hex = print_hex;
3571 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3573 if (!proto_tree_print(&print_args, edt, print_stream))
3576 if (!print_line(print_stream, 0, separator))
3582 proto_tree_write_pdml(edt, stdout);
3584 return !ferror(stdout);
3586 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3588 return !ferror(stdout);
3592 if (print_summary || print_details) {
3593 if (!print_line(print_stream, 0, ""))
3596 if (!print_hex_data(print_stream, edt))
3598 if (!print_line(print_stream, 0, separator))
3607 switch (output_action) {
3610 return print_finale(print_stream);
3614 write_pdml_finale(stdout);
3616 write_psml_finale(stdout);
3617 return !ferror(stdout);
3620 write_fields_finale(output_fields, stdout);
3621 return !ferror(stdout);
3624 g_assert_not_reached();
3630 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3634 char err_msg[2048+1];
3636 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3640 /* The open succeeded. Fill in the information for this file. */
3642 /* Cleanup all data structures used for dissection. */
3643 cleanup_dissection();
3644 /* Initialize all data structures used for dissection. */
3648 cf->f_datalen = 0; /* not used, but set it anyway */
3650 /* Set the file name because we need it to set the follow stream filter.
3651 XXX - is that still true? We need it for other reasons, though,
3653 cf->filename = g_strdup(fname);
3655 /* Indicate whether it's a permanent or temporary file. */
3656 cf->is_tempfile = is_tempfile;
3658 /* No user changes yet. */
3659 cf->unsaved_changes = FALSE;
3661 cf->cd_t = wtap_file_type(cf->wth);
3663 cf->drops_known = FALSE;
3665 cf->snap = wtap_snapshot_length(cf->wth);
3666 if (cf->snap == 0) {
3667 /* Snapshot length not known. */
3668 cf->has_snap = FALSE;
3669 cf->snap = WTAP_MAX_PACKET_SIZE;
3671 cf->has_snap = TRUE;
3672 nstime_set_zero(&cf->elapsed_time);
3673 nstime_set_unset(&first_ts);
3677 cf->state = FILE_READ_IN_PROGRESS;
3679 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3680 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3685 g_snprintf(err_msg, sizeof err_msg,
3686 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3687 cmdarg_err("%s", err_msg);
3692 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3694 char *save_file_string;
3696 save_file_string = output_file_description(fname);
3701 cmdarg_err("Not all the packets could be written to the %s because there is "
3702 "no space left on the file system.",
3708 cmdarg_err("Not all the packets could be written to the %s because you are "
3709 "too close to, or over your disk quota.",
3714 case WTAP_ERR_CANT_CLOSE:
3715 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3719 case WTAP_ERR_SHORT_WRITE:
3720 cmdarg_err("Not all the packets could be written to the %s.",
3726 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3727 wtap_strerror(err));
3729 cmdarg_err("An error occurred while writing to the %s: %s.",
3730 save_file_string, wtap_strerror(err));
3734 g_free(save_file_string);
3738 show_print_file_io_error(int err)
3743 cmdarg_err("Not all the packets could be printed because there is "
3744 "no space left on the file system.");
3749 cmdarg_err("Not all the packets could be printed because you are "
3750 "too close to, or over your disk quota.");
3755 cmdarg_err("An error occurred while printing packets: %s.",
3762 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3766 static char errmsg_errno[1024+1];
3769 /* Wiretap error. */
3772 case WTAP_ERR_NOT_REGULAR_FILE:
3773 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3776 case WTAP_ERR_RANDOM_OPEN_PIPE:
3777 /* Seen only when opening a capture file for reading. */
3778 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3781 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3782 /* Seen only when opening a capture file for reading. */
3783 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3786 case WTAP_ERR_UNSUPPORTED:
3787 /* Seen only when opening a capture file for reading. */
3788 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3789 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3792 errmsg = errmsg_errno;
3795 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3796 /* Seen only when opening a capture file for writing. */
3797 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3798 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3799 "written to a pipe.", wtap_file_type_short_string(file_type));
3800 errmsg = errmsg_errno;
3803 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3804 /* Seen only when opening a capture file for writing. */
3805 errmsg = "TShark doesn't support writing capture files in that format.";
3808 case WTAP_ERR_UNSUPPORTED_ENCAP:
3810 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3811 "TShark can't save this capture as a \"%s\" file.",
3812 wtap_file_type_short_string(file_type));
3814 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3815 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3819 errmsg = errmsg_errno;
3822 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3824 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3825 "TShark can't save this capture as a \"%s\" file.",
3826 wtap_file_type_short_string(file_type));
3827 errmsg = errmsg_errno;
3829 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3832 case WTAP_ERR_BAD_FILE:
3833 /* Seen only when opening a capture file for reading. */
3834 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3835 "The file \"%%s\" appears to be damaged or corrupt.\n"
3838 errmsg = errmsg_errno;
3841 case WTAP_ERR_CANT_OPEN:
3843 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3845 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3848 case WTAP_ERR_SHORT_READ:
3849 errmsg = "The file \"%s\" appears to have been cut short"
3850 " in the middle of a packet or other data.";
3853 case WTAP_ERR_SHORT_WRITE:
3854 errmsg = "A full header couldn't be written to the file \"%s\".";
3857 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3858 errmsg = "This file type cannot be written as a compressed file.";
3861 case WTAP_ERR_DECOMPRESS:
3862 /* Seen only when opening a capture file for reading. */
3863 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3864 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3867 errmsg = errmsg_errno;
3871 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3872 "The file \"%%s\" could not be %s: %s.",
3873 for_writing ? "created" : "opened",
3874 wtap_strerror(err));
3875 errmsg = errmsg_errno;
3879 errmsg = file_open_error_message(err, for_writing);
3884 * Open/create errors are reported with an console message in TShark.
3887 open_failure_message(const char *filename, int err, gboolean for_writing)
3889 fprintf(stderr, "tshark: ");
3890 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3891 fprintf(stderr, "\n");
3896 * General errors are reported with an console message in TShark.
3899 failure_message(const char *msg_format, va_list ap)
3901 fprintf(stderr, "tshark: ");
3902 vfprintf(stderr, msg_format, ap);
3903 fprintf(stderr, "\n");
3907 * Read errors are reported with an console message in TShark.
3910 read_failure_message(const char *filename, int err)
3912 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3913 filename, g_strerror(err));
3917 * Write errors are reported with an console message in TShark.
3920 write_failure_message(const char *filename, int err)
3922 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3923 filename, g_strerror(err));
3927 * Print to the standard error. This is a command-line tool, so there's
3928 * no need to pop up a console.
3931 vfprintf_stderr(const char *fmt, va_list ap)
3933 vfprintf(stderr, fmt, ap);
3937 fprintf_stderr(const char *fmt, ...)
3942 vfprintf_stderr(fmt, ap);
3947 * Report an error in command-line arguments.
3950 cmdarg_err(const char *fmt, ...)
3955 failure_message(fmt, ap);
3960 * Report additional information for an error in command-line arguments.
3963 cmdarg_err_cont(const char *fmt, ...)
3968 vfprintf(stderr, fmt, ap);
3969 fprintf(stderr, "\n");
3975 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3980 * indent-tabs-mode: nil
3983 * vi: set shiftwidth=2 tabstop=8 expandtab:
3984 * :indentSize=2:tabSize=8:noTabs=true: