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 "frame_tvbuff.h"
68 #include <epan/disabled_protos.h>
69 #include <epan/prefs.h>
70 #include <epan/column.h>
72 #include <epan/addr_resolv.h>
74 #include "clopts_common.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_session.h"
94 #include "capture_sync.h"
95 #include "capture_opts.h"
96 #endif /* HAVE_LIBPCAP */
98 #include <epan/funnel.h>
101 * This is the template for the decode as option; it is shared between the
102 * various functions that output the usage for this parameter.
104 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
106 static guint32 cum_bytes;
107 static nstime_t first_ts;
108 static frame_data *prev_dis;
109 static frame_data prev_dis_frame;
110 static frame_data *prev_cap;
111 static frame_data prev_cap_frame;
113 static const char* prev_display_dissector_name = NULL;
115 static gboolean perform_two_pass_analysis;
118 * The way the packet decode is to be written.
121 WRITE_TEXT, /* summary or detail text */
122 WRITE_XML, /* PDML or PSML */
123 WRITE_FIELDS /* User defined list of fields */
124 /* Add CSV and the like here */
127 static output_action_e output_action;
128 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
129 static gboolean print_packet_info; /* TRUE if we're to print packet information */
130 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
131 static gboolean print_details; /* TRUE if we're to print packet details information */
132 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
133 static gboolean line_buffered;
134 static gboolean really_quiet = FALSE;
136 static print_format_e print_format = PR_FMT_TEXT;
137 static print_stream_t *print_stream;
139 static output_fields_t* output_fields = NULL;
141 /* The line separator used between packets, changeable via the -S option */
142 static const char *separator = "";
146 * TRUE if we're to print packet counts to keep track of captured packets.
148 static gboolean print_packet_counts = TRUE;
150 static capture_options global_capture_opts;
151 static capture_session global_capture_session;
154 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
155 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
158 static gboolean capture(void);
159 static void report_counts(void);
161 static BOOL WINAPI capture_cleanup(DWORD);
163 static void capture_cleanup(int);
165 static void report_counts_siginfo(int);
168 #endif /* HAVE_LIBPCAP */
170 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
171 static gboolean process_packet(capture_file *cf, gint64 offset,
172 struct wtap_pkthdr *whdr, const guchar *pd,
173 gboolean filtering_tap_listeners, guint tap_flags);
174 static void show_capture_file_io_error(const char *, int, gboolean);
175 static void show_print_file_io_error(int err);
176 static gboolean write_preamble(capture_file *cf);
177 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
178 static gboolean write_finale(void);
179 static const char *cf_open_error_message(int err, gchar *err_info,
180 gboolean for_writing, int file_type);
182 static void open_failure_message(const char *filename, int err,
183 gboolean for_writing);
184 static void failure_message(const char *msg_format, va_list ap);
185 static void read_failure_message(const char *filename, int err);
186 static void write_failure_message(const char *filename, int err);
191 const char *sstr; /* The short string */
192 const char *lstr; /* The long string */
196 string_compare(gconstpointer a, gconstpointer b)
198 return strcmp(((const struct string_elem *)a)->sstr,
199 ((const struct string_elem *)b)->sstr);
203 string_elem_print(gpointer data, gpointer not_used _U_)
205 fprintf(stderr, " %s - %s\n",
206 ((struct string_elem *)data)->sstr,
207 ((struct string_elem *)data)->lstr);
211 list_capture_types(void) {
213 struct string_elem *captypes;
216 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
218 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
219 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
220 if (wtap_dump_can_open(i)) {
221 captypes[i].sstr = wtap_file_type_short_string(i);
222 captypes[i].lstr = wtap_file_type_string(i);
223 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
226 g_slist_foreach(list, string_elem_print, NULL);
232 print_usage(gboolean print_ver)
239 "TShark " VERSION "%s\n"
240 "Dump and analyze network traffic.\n"
241 "See http://www.wireshark.org for more information.\n"
244 wireshark_svnversion, get_copyright_info());
248 fprintf(output, "\n");
249 fprintf(output, "Usage: tshark [options] ...\n");
250 fprintf(output, "\n");
253 fprintf(output, "Capture interface:\n");
254 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
255 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
256 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
257 fprintf(output, " -p don't capture in promiscuous mode\n");
258 #ifdef HAVE_PCAP_CREATE
259 fprintf(output, " -I capture in monitor mode, if available\n");
261 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
262 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
264 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
265 fprintf(output, " -D print list of interfaces and exit\n");
266 fprintf(output, " -L print list of link-layer types of iface and exit\n");
267 fprintf(output, "\n");
268 fprintf(output, "Capture stop conditions:\n");
269 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
270 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
271 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
272 fprintf(output, " files:NUM - stop after NUM files\n");
273 /*fprintf(output, "\n");*/
274 fprintf(output, "Capture output:\n");
275 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
276 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
277 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
278 #endif /* HAVE_LIBPCAP */
279 #ifdef HAVE_PCAP_REMOTE
280 fprintf(output, "RPCAP options:\n");
281 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
283 /*fprintf(output, "\n");*/
284 fprintf(output, "Input file:\n");
285 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
287 fprintf(output, "\n");
288 fprintf(output, "Processing:\n");
289 fprintf(output, " -2 perform a two-pass analysis\n");
290 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
291 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
292 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
293 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
294 fprintf(output, " -d %s ...\n", decode_as_arg_template);
295 fprintf(output, " \"Decode As\", see the man page for details\n");
296 fprintf(output, " Example: tcp.port==8888,http\n");
297 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
298 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
300 /*fprintf(output, "\n");*/
301 fprintf(output, "Output:\n");
302 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
303 fprintf(output, " (or to the standard output for \"-\")\n");
304 fprintf(output, " -C <config profile> start with specified configuration profile\n");
305 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
306 fprintf(output, " an empty \"-F\" option will list the file types\n");
307 fprintf(output, " -V add output of packet tree (Packet Details)\n");
308 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
309 fprintf(output, " separated\n");
310 fprintf(output, " -P print packet summary even when writing to a file\n");
311 fprintf(output, " -S <separator> the line separator to print between packets\n");
312 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
313 fprintf(output, " -T pdml|ps|psml|text|fields\n");
314 fprintf(output, " format of text output (def: text)\n");
315 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
316 fprintf(output, " this option can be repeated to print multiple fields\n");
317 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
318 fprintf(output, " header=y|n switch headers on and off\n");
319 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
320 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
321 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
322 fprintf(output, " aggregator\n");
323 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
324 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
325 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
326 fprintf(output, " -l flush standard output after each packet\n");
327 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
328 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
329 fprintf(output, " -g enable group read access on the output file(s)\n");
330 fprintf(output, " -W n Save extra information in the file, if supported.\n");
331 fprintf(output, " n = write network address resolution information\n");
332 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
333 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
335 fprintf(output, "\n");
336 fprintf(output, "Miscellaneous:\n");
337 fprintf(output, " -h display this help and exit\n");
338 fprintf(output, " -v display version info and exit\n");
339 fprintf(output, " -o <name>:<value> ... override preference setting\n");
340 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
341 fprintf(output, " -G [report] dump one of several available reports and exit\n");
342 fprintf(output, " default report=\"fields\"\n");
343 fprintf(output, " use \"-G ?\" for more help\n");
347 glossary_option_help(void)
353 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
355 fprintf(output, "\n");
356 fprintf(output, "Usage: tshark -G [report]\n");
357 fprintf(output, "\n");
358 fprintf(output, "Glossary table reports:\n");
359 fprintf(output, " -G fields dump fields glossary and exit\n");
360 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
361 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
362 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
363 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
364 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
365 fprintf(output, "\n");
366 fprintf(output, "Preference reports:\n");
367 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
368 fprintf(output, " -G currentprefs dump current preferences and exit\n");
369 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 gchar *dfilter = NULL;
901 #ifdef HAVE_PCAP_OPEN_DEAD
902 struct bpf_program fcode;
904 dfilter_t *rfcode = NULL;
905 dfilter_t *dfcode = NULL;
910 gchar *output_only = NULL;
912 #ifdef HAVE_PCAP_REMOTE
913 #define OPTSTRING_A "A:"
915 #define OPTSTRING_A ""
918 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
919 #define OPTSTRING_B "B:"
921 #define OPTSTRING_B ""
922 #endif /* _WIN32 or HAVE_PCAP_CREATE */
923 #else /* HAVE_LIBPCAP */
924 #define OPTSTRING_B ""
925 #endif /* HAVE_LIBPCAP */
927 #ifdef HAVE_PCAP_CREATE
928 #define OPTSTRING_I "I"
930 #define OPTSTRING_I ""
933 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:Y:z:"
935 static const char optstring[] = OPTSTRING;
937 /* Assemble the compile-time version information string */
938 comp_info_str = g_string_new("Compiled ");
939 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
941 /* Assemble the run-time version information string */
942 runtime_info_str = g_string_new("Running ");
943 get_runtime_version_info(runtime_info_str, NULL);
945 /* Add it to the information to be reported on a crash. */
946 ws_add_crash_info("TShark " VERSION "%s\n"
951 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
954 arg_list_utf_16to8(argc, argv);
955 create_app_running_mutex();
956 #if !GLIB_CHECK_VERSION(2,31,0)
962 * Get credential information for later use.
964 init_process_policies();
967 * Attempt to get the pathname of the executable file.
969 init_progfile_dir_error = init_progfile_dir(argv[0], main);
970 if (init_progfile_dir_error != NULL) {
971 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
972 init_progfile_dir_error);
976 * In order to have the -X opts assigned before the wslua machine starts
977 * we need to call getopts before epan_init() gets called.
980 optind_initial = optind;
982 while ((opt = getopt(argc, argv, optstring)) != -1) {
984 case 'C': /* Configuration Profile */
985 if (profile_exists (optarg, FALSE)) {
986 set_profile_name (optarg);
988 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
992 case 'P': /* Print packet summary info even when writing to a file */
993 print_packet_info = TRUE;
994 print_summary = TRUE;
996 case 'O': /* Only output these protocols */
997 output_only = g_strdup(optarg);
999 case 'V': /* Verbose */
1000 print_details = TRUE;
1001 print_packet_info = TRUE;
1003 case 'x': /* Print packet data in hex (and ASCII) */
1005 /* The user asked for hex output, so let's ensure they get it,
1006 * even if they're writing to a file.
1008 print_packet_info = TRUE;
1019 * Print packet summary information is the default, unless either -V or -x
1020 * were specified and -P was not. Note that this is new behavior, which
1021 * allows for the possibility of printing only hex/ascii output without
1022 * necessarily requiring that either the summary or details be printed too.
1024 if (print_summary == -1)
1025 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1027 optind = optind_initial;
1032 /** Send All g_log messages to our own handler **/
1036 G_LOG_LEVEL_CRITICAL|
1037 G_LOG_LEVEL_WARNING|
1038 G_LOG_LEVEL_MESSAGE|
1041 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1043 g_log_set_handler(NULL,
1044 (GLogLevelFlags)log_flags,
1045 tshark_log_handler, NULL /* user_data */);
1046 g_log_set_handler(LOG_DOMAIN_MAIN,
1047 (GLogLevelFlags)log_flags,
1048 tshark_log_handler, NULL /* user_data */);
1051 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1052 (GLogLevelFlags)log_flags,
1053 tshark_log_handler, NULL /* user_data */);
1054 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1055 (GLogLevelFlags)log_flags,
1056 tshark_log_handler, NULL /* user_data */);
1059 initialize_funnel_ops();
1062 capture_opts_init(&global_capture_opts);
1063 capture_session_init(&global_capture_session, (void *)&cfile);
1066 timestamp_set_type(TS_RELATIVE);
1067 timestamp_set_precision(TS_PREC_AUTO);
1068 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1070 /* Register all dissectors; we must do this before checking for the
1071 "-G" flag, as the "-G" flag dumps information registered by the
1072 dissectors, and we must do it before we read the preferences, in
1073 case any dissectors register preferences. */
1074 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1075 failure_message, open_failure_message, read_failure_message,
1076 write_failure_message);
1078 /* Register all tap listeners; we do this before we parse the arguments,
1079 as the "-z" argument can specify a registered tap. */
1081 /* we register the plugin taps before the other taps because
1082 stats_tree taps plugins will be registered as tap listeners
1083 by stats_tree_stat.c and need to registered before that */
1085 register_all_plugin_tap_listeners();
1087 register_all_tap_listeners();
1089 /* If invoked with the "-G" flag, we dump out information based on
1090 the argument to the "-G" flag; if no argument is specified,
1091 for backwards compatibility we dump out a glossary of display
1094 XXX - we do this here, for now, to support "-G" with no arguments.
1095 If none of our build or other processes uses "-G" with no arguments,
1096 we can just process it with the other arguments. */
1097 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1098 proto_initialize_all_prefixes();
1101 proto_registrar_dump_fields();
1103 if (strcmp(argv[2], "fields") == 0)
1104 proto_registrar_dump_fields();
1105 else if (strcmp(argv[2], "protocols") == 0)
1106 proto_registrar_dump_protocols();
1107 else if (strcmp(argv[2], "values") == 0)
1108 proto_registrar_dump_values();
1109 else if (strcmp(argv[2], "ftypes") == 0)
1110 proto_registrar_dump_ftypes();
1111 else if (strcmp(argv[2], "decodes") == 0)
1112 dissector_dump_decodes();
1113 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1114 dissector_dump_heur_decodes();
1115 else if (strcmp(argv[2], "defaultprefs") == 0)
1117 else if (strcmp(argv[2], "plugins") == 0)
1119 else if (strcmp(argv[2], "?") == 0)
1120 glossary_option_help();
1121 else if (strcmp(argv[2], "-?") == 0)
1122 glossary_option_help();
1123 else if (strcmp(argv[2], "currentprefs") == 0) {
1124 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1125 &pf_open_errno, &pf_read_errno, &pf_path);
1128 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1135 /* Set the C-language locale to the native environment. */
1136 setlocale(LC_ALL, "");
1138 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1139 &pf_open_errno, &pf_read_errno, &pf_path);
1140 if (gpf_path != NULL) {
1141 if (gpf_open_errno != 0) {
1142 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1143 pf_path, g_strerror(gpf_open_errno));
1145 if (gpf_read_errno != 0) {
1146 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1147 pf_path, g_strerror(gpf_read_errno));
1150 if (pf_path != NULL) {
1151 if (pf_open_errno != 0) {
1152 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1153 g_strerror(pf_open_errno));
1155 if (pf_read_errno != 0) {
1156 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1157 pf_path, g_strerror(pf_read_errno));
1163 /* Read the disabled protocols file. */
1164 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1165 &dp_path, &dp_open_errno, &dp_read_errno);
1166 if (gdp_path != NULL) {
1167 if (gdp_open_errno != 0) {
1168 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1169 gdp_path, g_strerror(gdp_open_errno));
1171 if (gdp_read_errno != 0) {
1172 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1173 gdp_path, g_strerror(gdp_read_errno));
1177 if (dp_path != NULL) {
1178 if (dp_open_errno != 0) {
1180 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1181 g_strerror(dp_open_errno));
1183 if (dp_read_errno != 0) {
1185 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1186 g_strerror(dp_read_errno));
1191 check_capture_privs();
1193 cap_file_init(&cfile);
1195 /* Print format defaults to this. */
1196 print_format = PR_FMT_TEXT;
1198 output_fields = output_fields_new();
1200 /* Now get our args */
1201 while ((opt = getopt(argc, argv, optstring)) != -1) {
1203 case '2': /* Perform two pass analysis */
1204 perform_two_pass_analysis = TRUE;
1206 case 'a': /* autostop criteria */
1207 case 'b': /* Ringbuffer option */
1208 case 'c': /* Capture x packets */
1209 case 'f': /* capture filter */
1210 case 'g': /* enable group read access on file(s) */
1211 case 'i': /* Use interface x */
1212 case 'p': /* Don't capture in promiscuous mode */
1213 #ifdef HAVE_PCAP_REMOTE
1214 case 'A': /* Authentication */
1216 #ifdef HAVE_PCAP_CREATE
1217 case 'I': /* Capture in monitor mode, if available */
1219 case 's': /* Set the snapshot (capture) length */
1220 case 'w': /* Write to capture file x */
1221 case 'y': /* Set the pcap data link type */
1222 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1223 case 'B': /* Buffer size */
1224 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1226 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1231 capture_option_specified = TRUE;
1236 /* Configuration profile settings were already processed just ignore them this time*/
1238 case 'd': /* Decode as rule */
1239 if (!add_decode_as(optarg))
1242 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1243 case 'K': /* Kerberos keytab file */
1244 read_keytab_file(optarg);
1247 case 'D': /* Print a list of capture devices and exit */
1249 if_list = capture_interface_list(&err, &err_str,NULL);
1250 if (if_list == NULL) {
1252 case CANT_GET_INTERFACE_LIST:
1253 case DONT_HAVE_PCAP:
1254 cmdarg_err("%s", err_str);
1258 case NO_INTERFACES_FOUND:
1259 cmdarg_err("There are no interfaces on which a capture can be done");
1264 capture_opts_print_interfaces(if_list);
1265 free_interface_list(if_list);
1268 capture_option_specified = TRUE;
1274 output_fields_add(output_fields, optarg);
1278 if (!output_fields_set_option(output_fields, optarg)) {
1279 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1280 output_fields_list_options(stderr);
1285 out_file_type = wtap_short_string_to_file_type(optarg);
1286 if (out_file_type < 0) {
1287 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1288 list_capture_types();
1292 case 'W': /* Select extra information to save in our capture file */
1293 /* This is patterned after the -N flag which may not be the best idea. */
1294 if (strchr(optarg, 'n')) {
1295 out_file_name_res = TRUE;
1297 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1301 case 'H': /* Read address to name mappings from a hosts file */
1302 if (! add_hosts_file(optarg))
1304 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1307 out_file_name_res = TRUE;
1310 case 'h': /* Print help and exit */
1314 case 'l': /* "Line-buffer" standard output */
1315 /* This isn't line-buffering, strictly speaking, it's just
1316 flushing the standard output after the information for
1317 each packet is printed; however, that should be good
1318 enough for all the purposes to which "-l" is put (and
1319 is probably actually better for "-V", as it does fewer
1322 See the comment in "process_packet()" for an explanation of
1323 why we do that, and why we don't just use "setvbuf()" to
1324 make the standard output line-buffered (short version: in
1325 Windows, "line-buffered" is the same as "fully-buffered",
1326 and the output buffer is only flushed when it fills up). */
1327 line_buffered = TRUE;
1329 case 'L': /* Print list of link-layer types and exit */
1331 list_link_layer_types = TRUE;
1333 capture_option_specified = TRUE;
1337 case 'n': /* No name resolution */
1338 gbl_resolv_flags.mac_name = FALSE;
1339 gbl_resolv_flags.network_name = FALSE;
1340 gbl_resolv_flags.transport_name = FALSE;
1341 gbl_resolv_flags.concurrent_dns = FALSE;
1343 case 'N': /* Select what types of addresses/port #s to resolve */
1344 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1345 if (badopt != '\0') {
1346 cmdarg_err("-N specifies unknown resolving option '%c';",
1348 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1352 case 'o': /* Override preference from command line */
1353 switch (prefs_set_pref(optarg)) {
1358 case PREFS_SET_SYNTAX_ERR:
1359 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1363 case PREFS_SET_NO_SUCH_PREF:
1364 case PREFS_SET_OBSOLETE:
1365 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1370 case 'q': /* Quiet */
1373 case 'Q': /* Really quiet */
1375 really_quiet = TRUE;
1377 case 'r': /* Read capture file x */
1378 cf_name = g_strdup(optarg);
1380 case 'R': /* Read file filter */
1384 /* already processed; just ignore it now */
1386 case 'S': /* Set the line Separator to be printed between packets */
1387 separator = strdup(optarg);
1389 case 't': /* Time stamp type */
1390 if (strcmp(optarg, "r") == 0)
1391 timestamp_set_type(TS_RELATIVE);
1392 else if (strcmp(optarg, "a") == 0)
1393 timestamp_set_type(TS_ABSOLUTE);
1394 else if (strcmp(optarg, "ad") == 0)
1395 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1396 else if (strcmp(optarg, "d") == 0)
1397 timestamp_set_type(TS_DELTA);
1398 else if (strcmp(optarg, "dd") == 0)
1399 timestamp_set_type(TS_DELTA_DIS);
1400 else if (strcmp(optarg, "e") == 0)
1401 timestamp_set_type(TS_EPOCH);
1402 else if (strcmp(optarg, "u") == 0)
1403 timestamp_set_type(TS_UTC);
1404 else if (strcmp(optarg, "ud") == 0)
1405 timestamp_set_type(TS_UTC_WITH_DATE);
1407 cmdarg_err("Invalid time stamp type \"%s\"",
1409 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1410 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1411 cmdarg_err_cont("or \"ud\" for UTC with date.");
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 */
1479 /* We won't call the init function for the stat this soon
1480 as it would disallow MATE's fields (which are registered
1481 by the preferences set callback) from being used as
1482 part of a tap filter. Instead, we just add the argument
1483 to a list of stat arguments. */
1484 if (!process_stat_cmd_arg(optarg)) {
1485 if (strcmp("help", optarg)==0) {
1486 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1487 list_stat_cmd_args();
1490 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1491 cmdarg_err_cont(" -z argument must be one of :");
1492 list_stat_cmd_args();
1497 case '?': /* Bad flag - print usage message */
1500 list_capture_types();
1510 /* If we specified output fields, but not the output field type... */
1511 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1512 cmdarg_err("Output fields were specified with \"-e\", "
1513 "but \"-Tfields\" was not specified.");
1515 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1516 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1517 "specified with \"-e\".");
1522 /* If no capture filter or display filter has been specified, and there are
1523 still command-line arguments, treat them as the tokens of a capture
1524 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1525 flag was specified. */
1526 if (optind < argc) {
1527 if (cf_name != NULL) {
1528 if (dfilter != NULL) {
1529 cmdarg_err("Display filters were specified both with \"-d\" "
1530 "and with additional command-line arguments.");
1533 dfilter = get_args_as_string(argc, argv, optind);
1538 if (global_capture_opts.default_options.cfilter) {
1539 cmdarg_err("A default capture filter was specified both with \"-f\""
1540 " and with additional command-line arguments.");
1543 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1544 interface_options interface_opts;
1545 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1546 if (interface_opts.cfilter == NULL) {
1547 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1548 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1549 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1551 cmdarg_err("A capture filter was specified both with \"-f\""
1552 " and with additional command-line arguments.");
1556 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1558 capture_option_specified = TRUE;
1564 if (!global_capture_opts.saving_to_file) {
1565 /* We're not saving the capture to a file; if "-q" wasn't specified,
1566 we should print packet information */
1568 print_packet_info = TRUE;
1570 /* We're saving to a file; if we're writing to the standard output.
1571 and we'll also be writing dissected packets to the standard
1572 output, reject the request. At best, we could redirect that
1573 to the standard error; we *can't* write both to the standard
1574 output and have either of them be useful. */
1575 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1576 cmdarg_err("You can't write both raw packet data and dissected packets"
1577 " to the standard output.");
1582 /* We're not saving the capture to a file; if "-q" wasn't specified,
1583 we should print packet information */
1585 print_packet_info = TRUE;
1588 #ifndef HAVE_LIBPCAP
1589 if (capture_option_specified)
1590 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1597 /* We don't support capture filters when reading from a capture file
1598 (the BPF compiler doesn't support all link-layer types that we
1599 support in capture files we read). */
1601 if (cf_name != NULL) {
1602 if (global_capture_opts.default_options.cfilter) {
1603 cmdarg_err("Only read filters, not capture filters, "
1604 "can be specified when reading a capture file.");
1611 if (output_action != WRITE_TEXT) {
1612 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1617 if (output_only != NULL) {
1620 if (!print_details) {
1621 cmdarg_err("-O requires -V");
1625 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1626 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1627 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1631 if (rfilter != NULL && !perform_two_pass_analysis) {
1632 /* Just a warning, so we don't return */
1633 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1637 if (list_link_layer_types) {
1638 /* We're supposed to list the link-layer types for an interface;
1639 did the user also specify a capture file to be read? */
1641 /* Yes - that's bogus. */
1642 cmdarg_err("You can't specify -L and a capture file to be read.");
1645 /* No - did they specify a ring buffer option? */
1646 if (global_capture_opts.multi_files_on) {
1647 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1653 * "-r" was specified, so we're reading a capture file.
1654 * Capture options don't apply here.
1656 if (global_capture_opts.multi_files_on) {
1657 cmdarg_err("Multiple capture files requested, but "
1658 "a capture isn't being done.");
1661 if (global_capture_opts.has_file_duration) {
1662 cmdarg_err("Switching capture files after a time interval was specified, but "
1663 "a capture isn't being done.");
1666 if (global_capture_opts.has_ring_num_files) {
1667 cmdarg_err("A ring buffer of capture files was specified, but "
1668 "a capture isn't being done.");
1671 if (global_capture_opts.has_autostop_files) {
1672 cmdarg_err("A maximum number of capture files was specified, but "
1673 "a capture isn't being done.");
1677 /* Note: TShark now allows the restriction of a _read_ file by packet count
1678 * and byte count as well as a write file. Other autostop options remain valid
1679 * only for a write file.
1681 if (global_capture_opts.has_autostop_duration) {
1682 cmdarg_err("A maximum capture time was specified, but "
1683 "a capture isn't being done.");
1688 * "-r" wasn't specified, so we're doing a live capture.
1690 if (global_capture_opts.saving_to_file) {
1691 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1693 /* When capturing, we only support writing pcap or pcap-ng format. */
1694 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1695 cmdarg_err("Live captures can only be saved in libpcap format.");
1698 if (global_capture_opts.multi_files_on) {
1699 /* Multiple-file mode doesn't work under certain conditions:
1700 a) it doesn't work if you're writing to the standard output;
1701 b) it doesn't work if you're writing to a pipe;
1703 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1704 cmdarg_err("Multiple capture files requested, but "
1705 "the capture is being written to the standard output.");
1708 if (global_capture_opts.output_to_pipe) {
1709 cmdarg_err("Multiple capture files requested, but "
1710 "the capture file is a pipe.");
1713 if (!global_capture_opts.has_autostop_filesize &&
1714 !global_capture_opts.has_file_duration) {
1715 cmdarg_err("Multiple capture files requested, but "
1716 "no maximum capture file size or duration was specified.");
1720 /* Currently, we don't support read or display filters when capturing
1721 and saving the packets. */
1722 if (rfilter != NULL) {
1723 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1726 if (dfilter != NULL) {
1727 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1731 /* They didn't specify a "-w" flag, so we won't be saving to a
1732 capture file. Check for options that only make sense if
1733 we're saving to a file. */
1734 if (global_capture_opts.has_autostop_filesize) {
1735 cmdarg_err("Maximum capture file size specified, but "
1736 "capture isn't being saved to a file.");
1739 if (global_capture_opts.multi_files_on) {
1740 cmdarg_err("Multiple capture files requested, but "
1741 "the capture isn't being saved to a file.");
1750 /* Start windows sockets */
1751 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1754 /* Notify all registered modules that have had any of their preferences
1755 changed either from one of the preferences file or from the command
1756 line that their preferences have changed. */
1759 /* At this point MATE will have registered its field array so we can
1760 have a tap filter with one of MATE's late-registered fields as part
1761 of the filter. We can now process all the "-z" arguments. */
1762 start_requested_stats();
1765 /* We currently don't support taps, or printing dissected packets,
1766 if we're writing to a pipe. */
1767 if (global_capture_opts.saving_to_file &&
1768 global_capture_opts.output_to_pipe) {
1769 if (tap_listeners_require_dissection()) {
1770 cmdarg_err("Taps aren't supported when saving to a pipe.");
1773 if (print_packet_info) {
1774 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1780 /* disabled protocols as per configuration file */
1781 if (gdp_path == NULL && dp_path == NULL) {
1782 set_disabled_protos_list();
1785 /* Build the column format array */
1786 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1789 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1790 capture_opts_trim_ring_num_files(&global_capture_opts);
1793 if (rfilter != NULL) {
1794 if (!dfilter_compile(rfilter, &rfcode)) {
1795 cmdarg_err("%s", dfilter_error_msg);
1797 #ifdef HAVE_PCAP_OPEN_DEAD
1801 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1803 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1805 " Note: That read filter code looks like a valid capture filter;");
1807 " maybe you mixed them up?");
1816 cfile.rfcode = rfcode;
1818 if (dfilter != NULL) {
1819 if (!dfilter_compile(dfilter, &dfcode)) {
1820 cmdarg_err("%s", dfilter_error_msg);
1822 #ifdef HAVE_PCAP_OPEN_DEAD
1826 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1828 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1830 " Note: That display filter code looks like a valid capture filter;");
1832 " maybe you mixed them up?");
1841 cfile.dfcode = dfcode;
1843 if (print_packet_info) {
1844 /* If we're printing as text or PostScript, we have
1845 to create a print stream. */
1846 if (output_action == WRITE_TEXT) {
1847 switch (print_format) {
1850 print_stream = print_stream_text_stdio_new(stdout);
1854 print_stream = print_stream_ps_stdio_new(stdout);
1858 g_assert_not_reached();
1863 /* We have to dissect each packet if:
1865 we're printing information about each packet;
1867 we're using a read filter on the packets;
1869 we're using a display filter on the packets;
1871 we're using any taps that need dissection. */
1872 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1876 * We're reading a capture file.
1880 * Immediately relinquish any special privileges we have; we must not
1881 * be allowed to read any capture files the user running TShark
1884 relinquish_special_privs_perm();
1885 print_current_user();
1887 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1892 /* Set timestamp precision; there should arguably be a command-line
1893 option to let the user set this. */
1894 switch(wtap_file_tsprecision(cfile.wth)) {
1895 case(WTAP_FILE_TSPREC_SEC):
1896 timestamp_set_precision(TS_PREC_AUTO_SEC);
1898 case(WTAP_FILE_TSPREC_DSEC):
1899 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1901 case(WTAP_FILE_TSPREC_CSEC):
1902 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1904 case(WTAP_FILE_TSPREC_MSEC):
1905 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1907 case(WTAP_FILE_TSPREC_USEC):
1908 timestamp_set_precision(TS_PREC_AUTO_USEC);
1910 case(WTAP_FILE_TSPREC_NSEC):
1911 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1914 g_assert_not_reached();
1917 /* Process the packets in the file */
1920 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1921 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1922 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1924 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1927 CATCH(OutOfMemoryError) {
1931 "Sorry, but TShark has to terminate now!\n"
1933 "Some infos / workarounds can be found at:\n"
1934 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1939 /* We still dump out the results of taps, etc., as we might have
1940 read some packets; however, we exit with an error status. */
1944 /* No capture file specified, so we're supposed to do a live capture
1945 or get a list of link-layer types for a live capture device;
1946 do we have support for live captures? */
1948 /* if no interface was specified, pick a default */
1949 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1950 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1951 if (exit_status != 0)
1954 /* if requested, list the link layer types and exit */
1955 if (list_link_layer_types) {
1958 /* Get the list of link-layer types for the capture devices. */
1959 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1960 interface_options interface_opts;
1961 if_capabilities_t *caps;
1963 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1964 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1966 cmdarg_err("%s", err_str);
1970 if (caps->data_link_types == NULL) {
1971 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1974 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1975 free_if_capabilities(caps);
1980 if (print_packet_info) {
1981 if (!write_preamble(NULL)) {
1982 show_print_file_io_error(errno);
1985 } else if (!quiet) {
1987 * We're not printing information for each packet, and the user
1988 * didn't ask us not to print a count of packets as they arrive,
1989 * so print that count so the user knows that packets are arriving.
1991 * XXX - what if the user wants to do a live capture, doesn't want
1992 * to save it to a file, doesn't want information printed for each
1993 * packet, does want some "-z" statistic, and wants packet counts
1994 * so they know whether they're seeing any packets?
1996 print_packet_counts = TRUE;
1999 /* For now, assume libpcap gives microsecond precision. */
2000 timestamp_set_precision(TS_PREC_AUTO_USEC);
2003 * XXX - this returns FALSE if an error occurred, but it also
2004 * returns FALSE if the capture stops because a time limit
2005 * was reached (and possibly other limits), so we can't assume
2006 * it means an error.
2008 * The capture code is a bit twisty, so it doesn't appear to
2009 * be an easy fix. We just ignore the return value for now.
2010 * Instead, pass on the exit status from the capture child.
2013 exit_status = global_capture_session.fork_child_status;
2015 if (print_packet_info) {
2016 if (!write_finale()) {
2018 show_print_file_io_error(err);
2022 /* No - complain. */
2023 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2030 if (cfile.frames != NULL) {
2031 free_frame_data_sequence(cfile.frames);
2032 cfile.frames = NULL;
2035 draw_tap_listeners(TRUE);
2036 funnel_dump_all_text_windows();
2039 output_fields_free(output_fields);
2040 output_fields = NULL;
2045 /*#define USE_BROKEN_G_MAIN_LOOP*/
2047 #ifdef USE_BROKEN_G_MAIN_LOOP
2050 gboolean loop_running = FALSE;
2052 guint32 packet_count = 0;
2055 /* XXX - move to the right position / file */
2056 /* read from a pipe (callback) */
2057 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2059 typedef struct pipe_input_tag {
2063 pipe_input_cb_t input_cb;
2064 guint pipe_input_id;
2066 GMutex *callback_running;
2070 static pipe_input_t pipe_input;
2073 /* The timer has expired, see if there's stuff to read from the pipe,
2074 if so, do the callback */
2076 pipe_timer_cb(gpointer data)
2082 pipe_input_t *pipe_input_p = data;
2083 gint iterations = 0;
2085 g_mutex_lock (pipe_input_p->callback_running);
2087 /* try to read data from the pipe only 5 times, to avoid blocking */
2088 while(iterations < 5) {
2089 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2091 /* Oddly enough although Named pipes don't work on win9x,
2092 PeekNamedPipe does !!! */
2093 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2094 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2096 /* Get the child process exit status */
2097 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2100 /* If the Peek returned an error, or there are bytes to be read
2101 or the childwatcher thread has terminated then call the normal
2103 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2105 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2107 /* And call the real handler */
2108 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2109 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2110 /* pipe closed, return false so that the timer is stopped */
2111 g_mutex_unlock (pipe_input_p->callback_running);
2116 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2117 /* No data, stop now */
2124 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2126 g_mutex_unlock (pipe_input_p->callback_running);
2128 /* we didn't stopped the timer, so let it run */
2135 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2138 pipe_input.source = source;
2139 pipe_input.child_process = child_process;
2140 pipe_input.user_data = user_data;
2141 pipe_input.input_cb = input_cb;
2144 #if GLIB_CHECK_VERSION(2,31,0)
2145 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2146 g_mutex_init(pipe_input.callback_running);
2148 pipe_input.callback_running = g_mutex_new();
2150 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2151 do this but that doesn't cover all win32 platforms. GTK can do
2152 this but doesn't seem to work over processes. Attempt to do
2153 something similar here, start a timer and check for data on every
2155 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2156 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2167 GString *str = g_string_new("");
2168 #ifdef USE_TSHARK_SELECT
2172 struct sigaction action, oldaction;
2176 * XXX - dropping privileges is still required, until code cleanup is done
2178 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2179 * when it's done, we don't need special privileges to run tshark at all,
2180 * therefore we don't need to drop these privileges
2181 * The only thing we might want to keep is a warning if tshark is run as root,
2182 * as it's no longer necessary and potentially dangerous.
2184 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2185 * We've opened the capture device, so we shouldn't need any special
2186 * privileges any more; relinquish those privileges.
2188 * XXX - if we have saved set-user-ID support, we should give up those
2189 * privileges immediately, and then reclaim them long enough to get
2190 * a list of network interfaces and to open one, and then give them
2191 * up again, so that stuff we do while processing the argument list,
2192 * reading the user's preferences, loading and starting plugins
2193 * (especially *user* plugins), etc. is done with the user's privileges,
2194 * not special privileges.
2196 relinquish_special_privs_perm();
2197 print_current_user();
2199 /* Cleanup all data structures used for dissection. */
2200 cleanup_dissection();
2201 /* Initialize all data structures used for dissection. */
2205 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2206 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2208 /* Catch SIGINT and SIGTERM and, if we get either of them,
2209 clean up and exit. If SIGHUP isn't being ignored, catch
2210 it too and, if we get it, clean up and exit.
2212 We restart any read that was in progress, so that it doesn't
2213 disrupt reading from the sync pipe. The signal handler tells
2214 the capture child to finish; it will report that it finished,
2215 or will exit abnormally, so we'll stop reading from the sync
2216 pipe, pick up the exit status, and quit. */
2217 memset(&action, 0, sizeof(action));
2218 action.sa_handler = capture_cleanup;
2219 action.sa_flags = SA_RESTART;
2220 sigemptyset(&action.sa_mask);
2221 sigaction(SIGTERM, &action, NULL);
2222 sigaction(SIGINT, &action, NULL);
2223 sigaction(SIGHUP, NULL, &oldaction);
2224 if (oldaction.sa_handler == SIG_DFL)
2225 sigaction(SIGHUP, &action, NULL);
2228 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2229 quiet mode, report the number of packets we've captured.
2231 Again, restart any read that was in progress, so that it doesn't
2232 disrupt reading from the sync pipe. */
2233 action.sa_handler = report_counts_siginfo;
2234 action.sa_flags = SA_RESTART;
2235 sigemptyset(&action.sa_mask);
2236 sigaction(SIGINFO, &action, NULL);
2237 #endif /* SIGINFO */
2240 global_capture_session.state = CAPTURE_PREPARING;
2242 /* Let the user know which interfaces were chosen. */
2243 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2244 interface_options interface_opts;
2246 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2247 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2248 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2249 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2252 if (global_capture_opts.ifaces->len < 2) {
2254 if (global_capture_opts.ifaces->len < 4) {
2256 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2257 interface_options interface_opts;
2259 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2261 if (global_capture_opts.ifaces->len > 2) {
2262 g_string_append_printf(str, ",");
2264 g_string_append_printf(str, " ");
2265 if (i == global_capture_opts.ifaces->len - 1) {
2266 g_string_append_printf(str, "and ");
2269 g_string_append_printf(str, "'%s'", interface_opts.descr);
2272 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2274 if (really_quiet == FALSE)
2275 fprintf(stderr, "Capturing on %s\n", str->str);
2277 g_string_free(str, TRUE);
2279 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2284 /* the actual capture loop
2286 * XXX - glib doesn't seem to provide any event based loop handling.
2288 * XXX - for whatever reason,
2289 * calling g_main_loop_new() ends up in 100% cpu load.
2291 * But that doesn't matter: in UNIX we can use select() to find an input
2292 * source with something to do.
2294 * But that doesn't matter because we're in a CLI (that doesn't need to
2295 * update a GUI or something at the same time) so it's OK if we block
2296 * trying to read from the pipe.
2298 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2299 * wrong (but I leave it there in case I am...).
2302 #ifdef USE_TSHARK_SELECT
2304 FD_SET(pipe_input.source, &readfds);
2307 loop_running = TRUE;
2311 while (loop_running)
2313 #ifdef USE_TSHARK_SELECT
2314 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2320 } else if (ret == 1) {
2322 /* Call the real handler */
2323 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2324 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2327 #ifdef USE_TSHARK_SELECT
2332 CATCH(OutOfMemoryError) {
2336 "Sorry, but TShark has to terminate now!\n"
2338 "Some infos / workarounds can be found at:\n"
2339 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2346 /* capture child detected an error */
2348 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2350 cmdarg_err("%s", error_msg);
2351 cmdarg_err_cont("%s", secondary_error_msg);
2355 /* capture child detected an capture filter related error */
2357 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2359 capture_options *capture_opts = cap_session->capture_opts;
2360 dfilter_t *rfcode = NULL;
2361 interface_options interface_opts;
2363 g_assert(i < capture_opts->ifaces->len);
2364 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2366 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2368 "Invalid capture filter \"%s\" for interface %s!\n"
2370 "That string looks like a valid display filter; however, it isn't a valid\n"
2371 "capture filter (%s).\n"
2373 "Note that display filters and capture filters don't have the same syntax,\n"
2374 "so you can't use most display filter expressions as capture filters.\n"
2376 "See the User's Guide for a description of the capture filter syntax.",
2377 interface_opts.cfilter, interface_opts.descr, error_message);
2378 dfilter_free(rfcode);
2381 "Invalid capture filter \"%s\" for interface %s!\n"
2383 "That string isn't a valid capture filter (%s).\n"
2384 "See the User's Guide for a description of the capture filter syntax.",
2385 interface_opts.cfilter, interface_opts.descr, error_message);
2390 /* capture child tells us we have a new (or the first) capture file */
2392 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2394 capture_options *capture_opts = cap_session->capture_opts;
2395 gboolean is_tempfile;
2398 if (cap_session->state == CAPTURE_PREPARING) {
2399 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2401 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2403 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2405 /* free the old filename */
2406 if (capture_opts->save_file != NULL) {
2408 /* we start a new capture file, close the old one (if we had one before) */
2409 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2410 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2411 wtap_close(((capture_file *) cap_session->cf)->wth);
2413 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2416 g_free(capture_opts->save_file);
2417 is_tempfile = FALSE;
2419 /* we didn't had a save_file before, must be a tempfile */
2423 /* save the new filename */
2424 capture_opts->save_file = g_strdup(new_file);
2426 /* if we are in real-time mode, open the new file now */
2427 if (do_dissection) {
2428 /* Attempt to open the capture file and set up to read from it. */
2429 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2433 /* Don't unlink (delete) the save file - leave it around,
2434 for debugging purposes. */
2435 g_free(capture_opts->save_file);
2436 capture_opts->save_file = NULL;
2441 cap_session->state = CAPTURE_RUNNING;
2447 /* capture child tells us we have new packets to read */
2449 capture_input_new_packets(capture_session *cap_session, int to_read)
2455 capture_file *cf = (capture_file *)cap_session->cf;
2456 gboolean filtering_tap_listeners;
2461 * Prevent a SIGINFO handler from writing to the standard error while
2462 * we're doing so or writing to the standard output; instead, have it
2463 * just set a flag telling us to print that information when we're done.
2466 #endif /* SIGINFO */
2468 /* Do we have any tap listeners with filters? */
2469 filtering_tap_listeners = have_filtering_tap_listeners();
2471 /* Get the union of the flags for all tap listeners. */
2472 tap_flags = union_of_tap_listener_flags();
2474 if (do_dissection) {
2475 while (to_read-- && cf->wth) {
2476 wtap_cleareof(cf->wth);
2477 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2479 /* read from file failed, tell the capture child to stop */
2480 sync_pipe_stop(cap_session);
2481 wtap_close(cf->wth);
2484 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2485 wtap_buf_ptr(cf->wth),
2486 filtering_tap_listeners, tap_flags);
2489 /* packet successfully read and gone through the "Read Filter" */
2495 * Dumpcap's doing all the work; we're not doing any dissection.
2496 * Count all the packets it wrote.
2498 packet_count += to_read;
2501 if (print_packet_counts) {
2502 /* We're printing packet counts. */
2503 if (packet_count != 0) {
2504 fprintf(stderr, "\r%u ", packet_count);
2505 /* stderr could be line buffered */
2512 * Allow SIGINFO handlers to write.
2517 * If a SIGINFO handler asked us to write out capture counts, do so.
2521 #endif /* SIGINFO */
2527 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2528 /* Report the count only if we aren't printing a packet count
2529 as packets arrive. */
2530 fprintf(stderr, "%u packet%s captured\n", packet_count,
2531 plurality(packet_count, "", "s"));
2534 infoprint = FALSE; /* we just reported it */
2535 #endif /* SIGINFO */
2540 report_counts_siginfo(int signum _U_)
2542 int sav_errno = errno;
2543 /* If we've been told to delay printing, just set a flag asking
2544 that we print counts (if we're supposed to), otherwise print
2545 the count of packets captured (if we're supposed to). */
2552 #endif /* SIGINFO */
2555 /* capture child detected any packet drops? */
2557 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2559 if (print_packet_counts) {
2560 /* We're printing packet counts to stderr.
2561 Send a newline so that we move to the line after the packet count. */
2562 fprintf(stderr, "\n");
2566 /* We're printing packet counts to stderr.
2567 Send a newline so that we move to the line after the packet count. */
2568 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2574 * Capture child closed its side of the pipe, report any error and
2575 * do the required cleanup.
2578 capture_input_closed(capture_session *cap_session, gchar *msg)
2580 capture_file *cf = (capture_file *) cap_session->cf;
2583 fprintf(stderr, "tshark: %s\n", msg);
2587 if (cf != NULL && cf->wth != NULL) {
2588 wtap_close(cf->wth);
2589 if (cf->is_tempfile) {
2590 ws_unlink(cf->filename);
2593 #ifdef USE_BROKEN_G_MAIN_LOOP
2594 /*g_main_loop_quit(loop);*/
2597 loop_running = FALSE;
2606 capture_cleanup(DWORD ctrltype _U_)
2608 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2609 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2610 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2611 like SIGTERM at least when the machine's shutting down.
2613 For now, we handle them all as indications that we should clean up
2614 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2617 We must return TRUE so that no other handler - such as one that would
2618 terminate the process - gets called.
2620 XXX - for some reason, typing ^C to TShark, if you run this in
2621 a Cygwin console window in at least some versions of Cygwin,
2622 causes TShark to terminate immediately; this routine gets
2623 called, but the main loop doesn't get a chance to run and
2624 exit cleanly, at least if this is compiled with Microsoft Visual
2625 C++ (i.e., it's a property of the Cygwin console window or Bash;
2626 it happens if TShark is not built with Cygwin - for all I know,
2627 building it with Cygwin may make the problem go away). */
2629 /* tell the capture child to stop */
2630 sync_pipe_stop(&global_capture_session);
2632 /* don't stop our own loop already here, otherwise status messages and
2633 * cleanup wouldn't be done properly. The child will indicate the stop of
2634 * everything by calling capture_input_closed() later */
2640 capture_cleanup(int signum _U_)
2642 /* tell the capture child to stop */
2643 sync_pipe_stop(&global_capture_session);
2645 /* don't stop our own loop already here, otherwise status messages and
2646 * cleanup wouldn't be done properly. The child will indicate the stop of
2647 * everything by calling capture_input_closed() later */
2650 #endif /* HAVE_LIBPCAP */
2653 process_packet_first_pass(capture_file *cf,
2654 gint64 offset, struct wtap_pkthdr *whdr,
2659 gboolean create_proto_tree = FALSE;
2663 /* The frame number of this packet is one more than the count of
2664 frames in this packet. */
2665 framenum = cf->count + 1;
2667 /* If we're not running a display filter and we're not printing any
2668 packet information, we don't need to do a dissection. This means
2669 that all packets can be marked as 'passed'. */
2672 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2674 /* If we're going to print packet information, or we're going to
2675 run a read filter, or display filter, or we're going to process taps, set up to
2676 do a dissection and do so. */
2677 if (do_dissection) {
2678 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2679 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2680 /* Grab any resolved addresses */
2681 host_name_lookup_process();
2683 /* If we're going to be applying a filter, we'll need to
2684 create a protocol tree against which to apply the filter. */
2686 create_proto_tree = TRUE;
2688 /* We're not going to display the protocol tree on this pass,
2689 so it's not going to be "visible". */
2690 epan_dissect_init(&edt, create_proto_tree, FALSE);
2692 /* If we're running a read filter, prime the epan_dissect_t with that
2695 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2697 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2698 &first_ts, prev_dis, prev_cap);
2700 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2702 /* Run the read filter if we have one. */
2704 passed = dfilter_apply_edt(cf->rfcode, &edt);
2708 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2709 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2711 /* If we're not doing dissection then there won't be any dependent frames.
2712 * More importantly, edt.pi.dependent_frames won't be initialized because
2713 * epan hasn't been initialized.
2715 if (do_dissection) {
2716 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2721 /* if we don't add it to the frame_data_sequence, clean it up right now
2723 frame_data_destroy(&fdlocal);
2727 epan_dissect_cleanup(&edt);
2733 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2734 struct wtap_pkthdr *phdr, Buffer *buf,
2735 gboolean filtering_tap_listeners, guint tap_flags)
2737 gboolean create_proto_tree;
2742 /* If we're not running a display filter and we're not printing any
2743 packet information, we don't need to do a dissection. This means
2744 that all packets can be marked as 'passed'. */
2747 /* If we're going to print packet information, or we're going to
2748 run a read filter, or we're going to process taps, set up to
2749 do a dissection and do so. */
2750 if (do_dissection) {
2751 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2752 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2753 /* Grab any resolved addresses */
2754 host_name_lookup_process();
2756 if (cf->dfcode || print_details || filtering_tap_listeners ||
2757 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2758 create_proto_tree = TRUE;
2760 create_proto_tree = FALSE;
2762 /* The protocol tree will be "visible", i.e., printed, only if we're
2763 printing packet details, which is true if we're printing stuff
2764 ("print_packet_info" is true) and we're in verbose mode
2765 ("packet_details" is true). */
2766 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2768 /* If we're running a display filter, prime the epan_dissect_t with that
2771 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2773 col_custom_prime_edt(&edt, &cf->cinfo);
2775 /* We only need the columns if either
2776 1) some tap needs the columns
2778 2) we're printing packet info but we're *not* verbose; in verbose
2779 mode, we print the protocol tree, not the protocol summary.
2781 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2786 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2787 &first_ts, prev_dis, prev_cap);
2789 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2791 /* Run the read/display filter if we have one. */
2793 passed = dfilter_apply_edt(cf->dfcode, &edt);
2797 frame_data_set_after_dissect(fdata, &cum_bytes);
2798 /* Process this packet. */
2799 if (print_packet_info) {
2800 /* We're printing packet information; print the information for
2803 print_packet(cf, &edt);
2805 print_packet(cf, NULL);
2807 /* The ANSI C standard does not appear to *require* that a line-buffered
2808 stream be flushed to the host environment whenever a newline is
2809 written, it just says that, on such a stream, characters "are
2810 intended to be transmitted to or from the host environment as a
2811 block when a new-line character is encountered".
2813 The Visual C++ 6.0 C implementation doesn't do what is intended;
2814 even if you set a stream to be line-buffered, it still doesn't
2815 flush the buffer at the end of every line.
2817 So, if the "-l" flag was specified, we flush the standard output
2818 at the end of a packet. This will do the right thing if we're
2819 printing packet summary lines, and, as we print the entire protocol
2820 tree for a single packet without waiting for anything to happen,
2821 it should be as good as line-buffered mode if we're printing
2822 protocol trees. (The whole reason for the "-l" flag in either
2823 tcpdump or TShark is to allow the output of a live capture to
2824 be piped to a program or script and to have that script see the
2825 information for the packet as soon as it's printed, rather than
2826 having to wait until a standard I/O buffer fills up. */
2830 if (ferror(stdout)) {
2831 show_print_file_io_error(errno);
2839 if (do_dissection) {
2840 epan_dissect_cleanup(&edt);
2842 return passed || fdata->flags.dependent_of_displayed;
2846 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2847 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2850 int snapshot_length;
2854 gchar *err_info = NULL;
2856 char *save_file_string = NULL;
2857 gboolean filtering_tap_listeners;
2859 wtapng_section_t *shb_hdr;
2860 wtapng_iface_descriptions_t *idb_inf;
2864 shb_hdr = wtap_file_get_shb_info(cf->wth);
2865 idb_inf = wtap_file_get_idb_info(cf->wth);
2866 #ifdef PCAP_NG_DEFAULT
2867 if (idb_inf->number_of_interfaces > 1) {
2868 linktype = WTAP_ENCAP_PER_PACKET;
2870 linktype = wtap_file_encap(cf->wth);
2873 linktype = wtap_file_encap(cf->wth);
2875 if (save_file != NULL) {
2876 /* Get a string that describes what we're writing to */
2877 save_file_string = output_file_description(save_file);
2879 /* Set up to write to the capture file. */
2880 snapshot_length = wtap_snapshot_length(cf->wth);
2881 if (snapshot_length == 0) {
2882 /* Snapshot length of input file not known. */
2883 snapshot_length = WTAP_MAX_PACKET_SIZE;
2885 /* If we don't have an application name add Tshark */
2886 if (shb_hdr->shb_user_appl == NULL) {
2887 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2888 shb_hdr->shb_user_appl = appname;
2891 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2892 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2893 snapshot_length, FALSE /* compressed */, &err);
2895 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2896 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2902 /* We couldn't set up to write to the capture file. */
2905 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2906 cmdarg_err("Capture files can't be written in that format.");
2909 case WTAP_ERR_UNSUPPORTED_ENCAP:
2910 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2911 cmdarg_err("The capture file being read can't be written as a "
2912 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2915 case WTAP_ERR_CANT_OPEN:
2916 cmdarg_err("The %s couldn't be created for some "
2917 "unknown reason.", save_file_string);
2920 case WTAP_ERR_SHORT_WRITE:
2921 cmdarg_err("A full header couldn't be written to the %s.",
2926 cmdarg_err("The %s could not be created: %s.", save_file_string,
2927 wtap_strerror(err));
2933 if (print_packet_info) {
2934 if (!write_preamble(cf)) {
2936 show_print_file_io_error(err);
2943 if (pdh && out_file_name_res) {
2944 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2945 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2946 wtap_file_type_short_string(out_file_type));
2950 /* Do we have any tap listeners with filters? */
2951 filtering_tap_listeners = have_filtering_tap_listeners();
2953 /* Get the union of the flags for all tap listeners. */
2954 tap_flags = union_of_tap_listener_flags();
2956 if (perform_two_pass_analysis) {
2958 int old_max_packet_count = max_packet_count;
2960 /* Allocate a frame_data_sequence for all the frames. */
2961 cf->frames = new_frame_data_sequence();
2963 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2964 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2965 wtap_buf_ptr(cf->wth))) {
2966 /* Stop reading if we have the maximum number of packets;
2967 * When the -c option has not been used, max_packet_count
2968 * starts at 0, which practically means, never stop reading.
2969 * (unless we roll over max_packet_count ?)
2971 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2972 err = 0; /* This is not an error */
2978 /* Close the sequential I/O side, to free up memory it requires. */
2979 wtap_sequential_close(cf->wth);
2981 /* Allow the protocol dissectors to free up memory that they
2982 * don't need after the sequential run-through of the packets. */
2983 postseq_cleanup_all_protocols();
2985 max_packet_count = old_max_packet_count;
2989 buffer_init(&buf, 1500);
2990 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2991 fdata = frame_data_sequence_find(cf->frames, framenum);
2992 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2993 &buf, fdata->cap_len, &err, &err_info)) {
2994 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
2995 filtering_tap_listeners, tap_flags)) {
2996 /* Either there's no read filtering or this packet passed the
2997 filter, so, if we're writing to a capture file, write
3000 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3001 /* Error writing to a capture file */
3004 case WTAP_ERR_UNSUPPORTED_ENCAP:
3006 * This is a problem with the particular frame we're writing;
3007 * note that, and give the frame number.
3009 * XXX - framenum is not necessarily the frame number in
3010 * the input file if there was a read filter.
3013 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3014 framenum, cf->filename,
3015 wtap_file_type_short_string(out_file_type));
3019 show_capture_file_io_error(save_file, err, FALSE);
3022 wtap_dump_close(pdh, &err);
3027 /* Stop reading if we have the maximum number of packets;
3028 * When the -c option has not been used, max_packet_count
3029 * starts at 0, which practically means, never stop reading.
3030 * (unless we roll over max_packet_count ?)
3032 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3033 err = 0; /* This is not an error */
3043 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3046 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3047 wtap_buf_ptr(cf->wth),
3048 filtering_tap_listeners, tap_flags)) {
3049 /* Either there's no read filtering or this packet passed the
3050 filter, so, if we're writing to a capture file, write
3053 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3054 /* Error writing to a capture file */
3057 case WTAP_ERR_UNSUPPORTED_ENCAP:
3059 * This is a problem with the particular frame we're writing;
3060 * note that, and give the frame number.
3063 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3064 framenum, cf->filename,
3065 wtap_file_type_short_string(out_file_type));
3069 show_capture_file_io_error(save_file, err, FALSE);
3072 wtap_dump_close(pdh, &err);
3077 /* Stop reading if we have the maximum number of packets;
3078 * When the -c option has not been used, max_packet_count
3079 * starts at 0, which practically means, never stop reading.
3080 * (unless we roll over max_packet_count ?)
3082 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3083 err = 0; /* This is not an error */
3092 * Print a message noting that the read failed somewhere along the line.
3094 * If we're printing packet data, and the standard output and error are
3095 * going to the same place, flush the standard output, so everything
3096 * buffered up is written, and then print a newline to the standard error
3097 * before printing the error message, to separate it from the packet
3098 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3099 * the _fstat() documentation at Microsoft doesn't indicate whether
3100 * st_ino is even supported.)
3103 if (print_packet_info) {
3104 struct stat stat_stdout, stat_stderr;
3106 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3107 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3108 stat_stdout.st_ino == stat_stderr.st_ino) {
3110 fprintf(stderr, "\n");
3117 case WTAP_ERR_UNSUPPORTED:
3118 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3119 cf->filename, err_info);
3123 case WTAP_ERR_UNSUPPORTED_ENCAP:
3124 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3125 cf->filename, err_info);
3129 case WTAP_ERR_CANT_READ:
3130 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3134 case WTAP_ERR_SHORT_READ:
3135 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3139 case WTAP_ERR_BAD_FILE:
3140 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3141 cf->filename, err_info);
3145 case WTAP_ERR_DECOMPRESS:
3146 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3147 "(%s)", cf->filename, err_info);
3151 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3152 cf->filename, wtap_strerror(err));
3155 if (save_file != NULL) {
3156 /* Now close the capture file. */
3157 if (!wtap_dump_close(pdh, &err))
3158 show_capture_file_io_error(save_file, err, TRUE);
3161 if (save_file != NULL) {
3162 /* Now close the capture file. */
3163 if (!wtap_dump_close(pdh, &err))
3164 show_capture_file_io_error(save_file, err, TRUE);
3166 if (print_packet_info) {
3167 if (!write_finale()) {
3169 show_print_file_io_error(err);
3176 wtap_close(cf->wth);
3179 g_free(save_file_string);
3186 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3188 gboolean filtering_tap_listeners, guint tap_flags)
3191 gboolean create_proto_tree;
3196 /* Count this packet. */
3199 /* If we're not running a display filter and we're not printing any
3200 packet information, we don't need to do a dissection. This means
3201 that all packets can be marked as 'passed'. */
3204 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3206 /* If we're going to print packet information, or we're going to
3207 run a read filter, or we're going to process taps, set up to
3208 do a dissection and do so. */
3209 if (do_dissection) {
3210 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3211 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3212 /* Grab any resolved addresses */
3213 host_name_lookup_process();
3215 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3216 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3217 create_proto_tree = TRUE;
3219 create_proto_tree = FALSE;
3221 /* The protocol tree will be "visible", i.e., printed, only if we're
3222 printing packet details, which is true if we're printing stuff
3223 ("print_packet_info" is true) and we're in verbose mode
3224 ("packet_details" is true). */
3225 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3227 /* If we're running a filter, prime the epan_dissect_t with that
3230 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3232 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3234 col_custom_prime_edt(&edt, &cf->cinfo);
3236 /* We only need the columns if either
3237 1) some tap needs the columns
3239 2) we're printing packet info but we're *not* verbose; in verbose
3240 mode, we print the protocol tree, not the protocol summary.
3242 3) there is a column mapped as an individual field */
3243 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3248 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3249 &first_ts, prev_dis, prev_cap);
3251 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3253 /* Run the filters if we have them. */
3255 passed = dfilter_apply_edt(cf->rfcode, &edt);
3256 if (passed && cf->dfcode)
3257 passed = dfilter_apply_edt(cf->dfcode, &edt);
3261 frame_data_set_after_dissect(&fdata, &cum_bytes);
3263 /* Process this packet. */
3264 if (print_packet_info) {
3265 /* We're printing packet information; print the information for
3268 print_packet(cf, &edt);
3270 print_packet(cf, NULL);
3272 /* The ANSI C standard does not appear to *require* that a line-buffered
3273 stream be flushed to the host environment whenever a newline is
3274 written, it just says that, on such a stream, characters "are
3275 intended to be transmitted to or from the host environment as a
3276 block when a new-line character is encountered".
3278 The Visual C++ 6.0 C implementation doesn't do what is intended;
3279 even if you set a stream to be line-buffered, it still doesn't
3280 flush the buffer at the end of every line.
3282 So, if the "-l" flag was specified, we flush the standard output
3283 at the end of a packet. This will do the right thing if we're
3284 printing packet summary lines, and, as we print the entire protocol
3285 tree for a single packet without waiting for anything to happen,
3286 it should be as good as line-buffered mode if we're printing
3287 protocol trees. (The whole reason for the "-l" flag in either
3288 tcpdump or TShark is to allow the output of a live capture to
3289 be piped to a program or script and to have that script see the
3290 information for the packet as soon as it's printed, rather than
3291 having to wait until a standard I/O buffer fills up. */
3295 if (ferror(stdout)) {
3296 show_print_file_io_error(errno);
3301 /* this must be set after print_packet() [bug #8160] */
3302 prev_dis_frame = fdata;
3303 prev_dis = &prev_dis_frame;
3306 prev_cap_frame = fdata;
3307 prev_cap = &prev_cap_frame;
3309 if (do_dissection) {
3310 epan_dissect_cleanup(&edt);
3311 frame_data_destroy(&fdata);
3317 write_preamble(capture_file *cf)
3319 switch (output_action) {
3322 return print_preamble(print_stream, cf ? cf->filename : NULL);
3326 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3328 write_psml_preamble(stdout);
3329 return !ferror(stdout);
3332 write_fields_preamble(output_fields, stdout);
3333 return !ferror(stdout);
3336 g_assert_not_reached();
3342 get_line_buf(size_t len)
3344 static char *line_bufp = NULL;
3345 static size_t line_buf_len = 256;
3346 size_t new_line_buf_len;
3348 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3349 new_line_buf_len *= 2)
3351 if (line_bufp == NULL) {
3352 line_buf_len = new_line_buf_len;
3353 line_bufp = (char *)g_malloc(line_buf_len + 1);
3355 if (new_line_buf_len > line_buf_len) {
3356 line_buf_len = new_line_buf_len;
3357 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3364 print_columns(capture_file *cf)
3371 line_bufp = get_line_buf(256);
3374 for (i = 0; i < cf->cinfo.num_cols; i++) {
3375 /* Skip columns not marked as visible. */
3376 if (!get_column_visible(i))
3378 switch (cf->cinfo.col_fmt[i]) {
3382 * Don't print this if we're doing a live capture from a network
3383 * interface - if we're doing a live capture, you won't be
3384 * able to look at the capture in the future (it's not being
3385 * saved anywhere), so the frame numbers are unlikely to be
3388 * (XXX - it might be nice to be able to save and print at
3389 * the same time, sort of like an "Update list of packets
3390 * in real time" capture in Wireshark.)
3392 if (global_capture_opts.ifaces->len > 0)
3395 column_len = strlen(cf->cinfo.col_data[i]);
3398 line_bufp = get_line_buf(buf_offset + column_len);
3399 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3405 case COL_ABS_DATE_TIME:
3407 case COL_UTC_DATE_TIME: /* XXX - wider */
3408 column_len = strlen(cf->cinfo.col_data[i]);
3409 if (column_len < 10)
3411 line_bufp = get_line_buf(buf_offset + column_len);
3412 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3418 case COL_DEF_DL_SRC:
3419 case COL_RES_DL_SRC:
3420 case COL_UNRES_DL_SRC:
3421 case COL_DEF_NET_SRC:
3422 case COL_RES_NET_SRC:
3423 case COL_UNRES_NET_SRC:
3424 column_len = strlen(cf->cinfo.col_data[i]);
3425 if (column_len < 12)
3427 line_bufp = get_line_buf(buf_offset + column_len);
3428 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3434 case COL_DEF_DL_DST:
3435 case COL_RES_DL_DST:
3436 case COL_UNRES_DL_DST:
3437 case COL_DEF_NET_DST:
3438 case COL_RES_NET_DST:
3439 case COL_UNRES_NET_DST:
3440 column_len = strlen(cf->cinfo.col_data[i]);
3441 if (column_len < 12)
3443 line_bufp = get_line_buf(buf_offset + column_len);
3444 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3448 column_len = strlen(cf->cinfo.col_data[i]);
3449 line_bufp = get_line_buf(buf_offset + column_len);
3450 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3453 buf_offset += column_len;
3454 if (i != cf->cinfo.num_cols - 1) {
3456 * This isn't the last column, so we need to print a
3457 * separator between this column and the next.
3459 * If we printed a network source and are printing a
3460 * network destination of the same type next, separate
3461 * them with " -> "; if we printed a network destination
3462 * and are printing a network source of the same type
3463 * next, separate them with " <- "; otherwise separate them
3466 * We add enough space to the buffer for " <- " or " -> ",
3467 * even if we're only adding " ".
3469 line_bufp = get_line_buf(buf_offset + 4);
3470 switch (cf->cinfo.col_fmt[i]) {
3475 switch (cf->cinfo.col_fmt[i + 1]) {
3480 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3485 g_strlcat(line_bufp + buf_offset, " ", 5);
3491 case COL_DEF_DL_SRC:
3492 case COL_RES_DL_SRC:
3493 case COL_UNRES_DL_SRC:
3494 switch (cf->cinfo.col_fmt[i + 1]) {
3496 case COL_DEF_DL_DST:
3497 case COL_RES_DL_DST:
3498 case COL_UNRES_DL_DST:
3499 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3504 g_strlcat(line_bufp + buf_offset, " ", 5);
3510 case COL_DEF_NET_SRC:
3511 case COL_RES_NET_SRC:
3512 case COL_UNRES_NET_SRC:
3513 switch (cf->cinfo.col_fmt[i + 1]) {
3515 case COL_DEF_NET_DST:
3516 case COL_RES_NET_DST:
3517 case COL_UNRES_NET_DST:
3518 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3523 g_strlcat(line_bufp + buf_offset, " ", 5);
3532 switch (cf->cinfo.col_fmt[i + 1]) {
3537 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3542 g_strlcat(line_bufp + buf_offset, " ", 5);
3548 case COL_DEF_DL_DST:
3549 case COL_RES_DL_DST:
3550 case COL_UNRES_DL_DST:
3551 switch (cf->cinfo.col_fmt[i + 1]) {
3553 case COL_DEF_DL_SRC:
3554 case COL_RES_DL_SRC:
3555 case COL_UNRES_DL_SRC:
3556 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3561 g_strlcat(line_bufp + buf_offset, " ", 5);
3567 case COL_DEF_NET_DST:
3568 case COL_RES_NET_DST:
3569 case COL_UNRES_NET_DST:
3570 switch (cf->cinfo.col_fmt[i + 1]) {
3572 case COL_DEF_NET_SRC:
3573 case COL_RES_NET_SRC:
3574 case COL_UNRES_NET_SRC:
3575 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3580 g_strlcat(line_bufp + buf_offset, " ", 5);
3587 g_strlcat(line_bufp + buf_offset, " ", 5);
3593 return print_line(print_stream, 0, line_bufp);
3597 print_packet(capture_file *cf, epan_dissect_t *edt)
3599 print_args_t print_args;
3601 if (print_summary || output_fields_has_cols(output_fields)) {
3602 /* Just fill in the columns. */
3603 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3605 if (print_summary) {
3606 /* Now print them. */
3607 switch (output_action) {
3610 if (!print_columns(cf))
3615 proto_tree_write_psml(edt, stdout);
3616 return !ferror(stdout);
3617 case WRITE_FIELDS: /*No non-verbose "fields" format */
3618 g_assert_not_reached();
3623 if (print_details) {
3624 /* Print the information in the protocol tree. */
3625 switch (output_action) {
3628 /* Only initialize the fields that are actually used in proto_tree_print.
3629 * This is particularly important for .range, as that's heap memory which
3630 * we would otherwise have to g_free().
3631 print_args.to_file = TRUE;
3632 print_args.format = print_format;
3633 print_args.print_summary = print_summary;
3634 print_args.print_formfeed = FALSE;
3635 packet_range_init(&print_args.range, &cfile);
3637 print_args.print_hex = print_hex;
3638 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3640 if (!proto_tree_print(&print_args, edt, print_stream))
3643 if (!print_line(print_stream, 0, separator))
3649 proto_tree_write_pdml(edt, stdout);
3651 return !ferror(stdout);
3653 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3655 return !ferror(stdout);
3659 if (print_summary || print_details) {
3660 if (!print_line(print_stream, 0, ""))
3663 if (!print_hex_data(print_stream, edt))
3665 if (!print_line(print_stream, 0, separator))
3674 switch (output_action) {
3677 return print_finale(print_stream);
3681 write_pdml_finale(stdout);
3683 write_psml_finale(stdout);
3684 return !ferror(stdout);
3687 write_fields_finale(output_fields, stdout);
3688 return !ferror(stdout);
3691 g_assert_not_reached();
3697 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3701 char err_msg[2048+1];
3703 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3707 /* The open succeeded. Fill in the information for this file. */
3709 /* Cleanup all data structures used for dissection. */
3710 cleanup_dissection();
3711 /* Initialize all data structures used for dissection. */
3715 cf->f_datalen = 0; /* not used, but set it anyway */
3717 /* Set the file name because we need it to set the follow stream filter.
3718 XXX - is that still true? We need it for other reasons, though,
3720 cf->filename = g_strdup(fname);
3722 /* Indicate whether it's a permanent or temporary file. */
3723 cf->is_tempfile = is_tempfile;
3725 /* No user changes yet. */
3726 cf->unsaved_changes = FALSE;
3728 cf->cd_t = wtap_file_type(cf->wth);
3730 cf->drops_known = FALSE;
3732 cf->snap = wtap_snapshot_length(cf->wth);
3733 if (cf->snap == 0) {
3734 /* Snapshot length not known. */
3735 cf->has_snap = FALSE;
3736 cf->snap = WTAP_MAX_PACKET_SIZE;
3738 cf->has_snap = TRUE;
3739 nstime_set_zero(&cf->elapsed_time);
3740 nstime_set_unset(&first_ts);
3744 cf->state = FILE_READ_IN_PROGRESS;
3746 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3747 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3752 g_snprintf(err_msg, sizeof err_msg,
3753 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3754 cmdarg_err("%s", err_msg);
3759 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3761 char *save_file_string;
3763 save_file_string = output_file_description(fname);
3768 cmdarg_err("Not all the packets could be written to the %s because there is "
3769 "no space left on the file system.",
3775 cmdarg_err("Not all the packets could be written to the %s because you are "
3776 "too close to, or over your disk quota.",
3781 case WTAP_ERR_CANT_CLOSE:
3782 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3786 case WTAP_ERR_SHORT_WRITE:
3787 cmdarg_err("Not all the packets could be written to the %s.",
3793 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3794 wtap_strerror(err));
3796 cmdarg_err("An error occurred while writing to the %s: %s.",
3797 save_file_string, wtap_strerror(err));
3801 g_free(save_file_string);
3805 show_print_file_io_error(int err)
3810 cmdarg_err("Not all the packets could be printed because there is "
3811 "no space left on the file system.");
3816 cmdarg_err("Not all the packets could be printed because you are "
3817 "too close to, or over your disk quota.");
3822 cmdarg_err("An error occurred while printing packets: %s.",
3829 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3833 static char errmsg_errno[1024+1];
3836 /* Wiretap error. */
3839 case WTAP_ERR_NOT_REGULAR_FILE:
3840 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3843 case WTAP_ERR_RANDOM_OPEN_PIPE:
3844 /* Seen only when opening a capture file for reading. */
3845 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3848 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3849 /* Seen only when opening a capture file for reading. */
3850 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3853 case WTAP_ERR_UNSUPPORTED:
3854 /* Seen only when opening a capture file for reading. */
3855 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3856 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3859 errmsg = errmsg_errno;
3862 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3863 /* Seen only when opening a capture file for writing. */
3864 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3865 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3866 "written to a pipe.", wtap_file_type_short_string(file_type));
3867 errmsg = errmsg_errno;
3870 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3871 /* Seen only when opening a capture file for writing. */
3872 errmsg = "TShark doesn't support writing capture files in that format.";
3875 case WTAP_ERR_UNSUPPORTED_ENCAP:
3877 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3878 "TShark can't save this capture as a \"%s\" file.",
3879 wtap_file_type_short_string(file_type));
3881 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3882 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3886 errmsg = errmsg_errno;
3889 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3891 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3892 "TShark can't save this capture as a \"%s\" file.",
3893 wtap_file_type_short_string(file_type));
3894 errmsg = errmsg_errno;
3896 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3899 case WTAP_ERR_BAD_FILE:
3900 /* Seen only when opening a capture file for reading. */
3901 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3902 "The file \"%%s\" appears to be damaged or corrupt.\n"
3905 errmsg = errmsg_errno;
3908 case WTAP_ERR_CANT_OPEN:
3910 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3912 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3915 case WTAP_ERR_SHORT_READ:
3916 errmsg = "The file \"%s\" appears to have been cut short"
3917 " in the middle of a packet or other data.";
3920 case WTAP_ERR_SHORT_WRITE:
3921 errmsg = "A full header couldn't be written to the file \"%s\".";
3924 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3925 errmsg = "This file type cannot be written as a compressed file.";
3928 case WTAP_ERR_DECOMPRESS:
3929 /* Seen only when opening a capture file for reading. */
3930 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3931 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3934 errmsg = errmsg_errno;
3938 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3939 "The file \"%%s\" could not be %s: %s.",
3940 for_writing ? "created" : "opened",
3941 wtap_strerror(err));
3942 errmsg = errmsg_errno;
3946 errmsg = file_open_error_message(err, for_writing);
3951 * Open/create errors are reported with an console message in TShark.
3954 open_failure_message(const char *filename, int err, gboolean for_writing)
3956 fprintf(stderr, "tshark: ");
3957 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3958 fprintf(stderr, "\n");
3963 * General errors are reported with an console message in TShark.
3966 failure_message(const char *msg_format, va_list ap)
3968 fprintf(stderr, "tshark: ");
3969 vfprintf(stderr, msg_format, ap);
3970 fprintf(stderr, "\n");
3974 * Read errors are reported with an console message in TShark.
3977 read_failure_message(const char *filename, int err)
3979 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3980 filename, g_strerror(err));
3984 * Write errors are reported with an console message in TShark.
3987 write_failure_message(const char *filename, int err)
3989 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3990 filename, g_strerror(err));
3994 * Report an error in command-line arguments.
3997 cmdarg_err(const char *fmt, ...)
4002 failure_message(fmt, ap);
4007 * Report additional information for an error in command-line arguments.
4010 cmdarg_err_cont(const char *fmt, ...)
4015 vfprintf(stderr, fmt, ap);
4016 fprintf(stderr, "\n");
4022 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4027 * indent-tabs-mode: nil
4030 * vi: set shiftwidth=2 tabstop=8 expandtab:
4031 * :indentSize=2:tabSize=8:noTabs=true: