3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
48 #ifdef HAVE_SYS_STAT_H
49 # include <sys/stat.h>
53 #include "wsutil/wsgetopt.h"
57 #include <epan/epan.h>
58 #include <epan/filesystem.h>
59 #include <wsutil/crash_info.h>
60 #include <wsutil/privileges.h>
61 #include <wsutil/file_util.h>
64 #include <epan/timestamp.h>
65 #include <epan/packet.h>
67 #include "disabled_protos.h"
68 #include <epan/prefs.h>
69 #include <epan/column.h>
71 #include <epan/addr_resolv.h>
73 #include "clopts_common.h"
74 #include "console_io.h"
75 #include "cmdarg_err.h"
76 #include "version_info.h"
77 #include <epan/plugins.h>
79 #include <epan/epan_dissect.h>
81 #include <epan/stat_cmd_args.h>
82 #include <epan/timestamp.h>
83 #include <epan/ex-opt.h>
86 #include "capture_ui_utils.h"
87 #include "capture_ifinfo.h"
88 #include "capture-pcap-util.h"
90 #include "capture-wpcap.h"
91 #include <wsutil/unicode-utils.h>
93 #include "capture_sync.h"
94 #endif /* HAVE_LIBPCAP */
96 #include <epan/funnel.h>
97 #include "capture_opts.h"
100 * This is the template for the decode as option; it is shared between the
101 * various functions that output the usage for this parameter.
103 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
105 static guint32 cum_bytes;
106 static nstime_t first_ts;
107 static frame_data *prev_dis;
108 static frame_data prev_dis_frame;
109 static frame_data *prev_cap;
110 static frame_data prev_cap_frame;
112 static const char* prev_display_dissector_name = NULL;
114 static gboolean perform_two_pass_analysis;
117 * The way the packet decode is to be written.
120 WRITE_TEXT, /* summary or detail text */
121 WRITE_XML, /* PDML or PSML */
122 WRITE_FIELDS /* User defined list of fields */
123 /* Add CSV and the like here */
126 static output_action_e output_action;
127 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
128 static gboolean print_packet_info; /* TRUE if we're to print packet information */
129 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
130 static gboolean print_details; /* TRUE if we're to print packet details information */
131 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
132 static gboolean line_buffered;
133 static gboolean really_quiet = FALSE;
135 static print_format_e print_format = PR_FMT_TEXT;
136 static print_stream_t *print_stream;
138 static output_fields_t* output_fields = NULL;
140 /* The line separator used between packets, changeable via the -S option */
141 static const char *separator = "";
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts = TRUE;
149 static capture_options global_capture_opts;
152 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
153 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
156 static gboolean capture(void);
157 static void report_counts(void);
159 static BOOL WINAPI capture_cleanup(DWORD);
161 static void capture_cleanup(int);
163 static void report_counts_siginfo(int);
166 #endif /* HAVE_LIBPCAP */
168 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
169 static gboolean process_packet(capture_file *cf, gint64 offset,
170 struct wtap_pkthdr *whdr,
171 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
172 static void show_capture_file_io_error(const char *, int, gboolean);
173 static void show_print_file_io_error(int err);
174 static gboolean write_preamble(capture_file *cf);
175 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
176 static gboolean write_finale(void);
177 static const char *cf_open_error_message(int err, gchar *err_info,
178 gboolean for_writing, int file_type);
180 static void open_failure_message(const char *filename, int err,
181 gboolean for_writing);
182 static void failure_message(const char *msg_format, va_list ap);
183 static void read_failure_message(const char *filename, int err);
184 static void write_failure_message(const char *filename, int err);
189 const char *sstr; /* The short string */
190 const char *lstr; /* The long string */
194 string_compare(gconstpointer a, gconstpointer b)
196 return strcmp(((const struct string_elem *)a)->sstr,
197 ((const struct string_elem *)b)->sstr);
201 string_elem_print(gpointer data, gpointer not_used _U_)
203 fprintf(stderr, " %s - %s\n",
204 ((struct string_elem *)data)->sstr,
205 ((struct string_elem *)data)->lstr);
209 list_capture_types(void) {
211 struct string_elem *captypes;
214 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
216 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
217 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
218 if (wtap_dump_can_open(i)) {
219 captypes[i].sstr = wtap_file_type_short_string(i);
220 captypes[i].lstr = wtap_file_type_string(i);
221 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
224 g_slist_foreach(list, string_elem_print, NULL);
230 print_usage(gboolean print_ver)
237 "TShark " VERSION "%s\n"
238 "Dump and analyze network traffic.\n"
239 "See http://www.wireshark.org for more information.\n"
242 wireshark_svnversion, get_copyright_info());
246 fprintf(output, "\n");
247 fprintf(output, "Usage: tshark [options] ...\n");
248 fprintf(output, "\n");
251 fprintf(output, "Capture interface:\n");
252 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
253 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
254 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
255 fprintf(output, " -p don't capture in promiscuous mode\n");
256 #ifdef HAVE_PCAP_CREATE
257 fprintf(output, " -I capture in monitor mode, if available\n");
259 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
260 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
262 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
263 fprintf(output, " -D print list of interfaces and exit\n");
264 fprintf(output, " -L print list of link-layer types of iface and exit\n");
265 fprintf(output, "\n");
266 fprintf(output, "Capture stop conditions:\n");
267 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
268 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
269 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
270 fprintf(output, " files:NUM - stop after NUM files\n");
271 /*fprintf(output, "\n");*/
272 fprintf(output, "Capture output:\n");
273 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
274 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
275 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
276 #endif /* HAVE_LIBPCAP */
277 #ifdef HAVE_PCAP_REMOTE
278 fprintf(output, "RPCAP options:\n");
279 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
281 /*fprintf(output, "\n");*/
282 fprintf(output, "Input file:\n");
283 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
285 fprintf(output, "\n");
286 fprintf(output, "Processing:\n");
287 fprintf(output, " -2 perform a two-pass analysis\n");
288 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
289 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
290 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
291 fprintf(output, " -d %s ...\n", decode_as_arg_template);
292 fprintf(output, " \"Decode As\", see the man page for details\n");
293 fprintf(output, " Example: tcp.port==8888,http\n");
294 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
295 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
297 /*fprintf(output, "\n");*/
298 fprintf(output, "Output:\n");
299 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
300 fprintf(output, " (or to the standard output for \"-\")\n");
301 fprintf(output, " -C <config profile> start with specified configuration profile\n");
302 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
303 fprintf(output, " an empty \"-F\" option will list the file types\n");
304 fprintf(output, " -V add output of packet tree (Packet Details)\n");
305 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
306 fprintf(output, " separated\n");
307 fprintf(output, " -P print packet summary even when writing to a file\n");
308 fprintf(output, " -S <separator> the line separator to print between packets\n");
309 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
310 fprintf(output, " -T pdml|ps|psml|text|fields\n");
311 fprintf(output, " format of text output (def: text)\n");
312 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
313 fprintf(output, " this option can be repeated to print multiple fields\n");
314 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
315 fprintf(output, " header=y|n switch headers on and off\n");
316 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
317 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
318 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
319 fprintf(output, " aggregator\n");
320 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
321 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
322 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
323 fprintf(output, " -l flush standard output after each packet\n");
324 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
325 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
326 fprintf(output, " -g enable group read access on the output file(s)\n");
327 fprintf(output, " -W n Save extra information in the file, if supported.\n");
328 fprintf(output, " n = write network address resolution information\n");
329 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
330 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
332 fprintf(output, "\n");
333 fprintf(output, "Miscellaneous:\n");
334 fprintf(output, " -h display this help and exit\n");
335 fprintf(output, " -v display version info and exit\n");
336 fprintf(output, " -o <name>:<value> ... override preference setting\n");
337 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
338 fprintf(output, " -G [report] dump one of several available reports and exit\n");
339 fprintf(output, " default report=\"fields\"\n");
340 fprintf(output, " use \"-G ?\" for more help\n");
344 glossary_option_help(void)
350 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
352 fprintf(output, "\n");
353 fprintf(output, "Usage: tshark -G [report]\n");
354 fprintf(output, "\n");
355 fprintf(output, "Glossary table reports:\n");
356 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
357 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
358 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
359 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
360 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
361 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
362 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
363 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
364 fprintf(output, "\n");
365 fprintf(output, "Preference reports:\n");
366 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
367 fprintf(output, " -G currentprefs dump current preferences and exit\n");
368 fprintf(output, "\n");
373 * For a dissector table, print on the stream described by output,
374 * its short name (which is what's used in the "-d" option) and its
378 display_dissector_table_names(const char *table_name, const char *ui_name,
381 if ((prev_display_dissector_name == NULL) ||
382 (strcmp(prev_display_dissector_name, table_name) != 0)) {
383 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
384 prev_display_dissector_name = table_name;
389 * For a dissector handle, print on the stream described by output,
390 * the filter name (which is what's used in the "-d" option) and the full
391 * name for the protocol that corresponds to this handle.
394 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
397 const gchar *proto_filter_name;
398 const gchar *proto_ui_name;
400 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
402 if (proto_id != -1) {
403 proto_filter_name = proto_get_protocol_filter_name(proto_id);
404 proto_ui_name = proto_get_protocol_name(proto_id);
405 g_assert(proto_filter_name != NULL);
406 g_assert(proto_ui_name != NULL);
408 if ((prev_display_dissector_name == NULL) ||
409 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
410 fprintf((FILE *)output, "\t%s (%s)\n",
413 prev_display_dissector_name = proto_filter_name;
419 * The protocol_name_search structure is used by find_protocol_name_func()
420 * to pass parameters and store results
422 struct protocol_name_search{
423 gchar *searched_name; /* Protocol filter name we are looking for */
424 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
425 guint nb_match; /* How many dissectors matched searched_name */
427 typedef struct protocol_name_search *protocol_name_search_t;
430 * This function parses all dissectors associated with a table to find the
431 * one whose protocol has the specified filter name. It is called
432 * as a reference function in a call to dissector_table_foreach_handle.
433 * The name we are looking for, as well as the results, are stored in the
434 * protocol_name_search struct pointed to by user_data.
435 * If called using dissector_table_foreach_handle, we actually parse the
436 * whole list of dissectors.
439 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
443 const gchar *protocol_filter_name;
444 protocol_name_search_t search_info;
448 search_info = (protocol_name_search_t)user_data;
450 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
451 if (proto_id != -1) {
452 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
453 g_assert(protocol_filter_name != NULL);
454 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
456 if (search_info->nb_match == 0) {
457 /* Record this handle only if this is the first match */
458 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
460 search_info->nb_match++;
466 * Allow dissector key names to be sorted alphabetically
470 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
472 return strcmp((const char*)dissector_a, (const char*)dissector_b);
476 * Print all layer type names supported.
477 * We send the output to the stream described by the handle output.
481 fprint_all_layer_types(FILE *output)
484 prev_display_dissector_name = NULL;
485 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
489 * Print all protocol names supported for a specific layer type.
490 * table_name contains the layer type name in which the search is performed.
491 * We send the output to the stream described by the handle output.
495 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
498 prev_display_dissector_name = NULL;
499 dissector_table_foreach_handle(table_name,
500 display_dissector_names,
505 * The function below parses the command-line parameters for the decode as
506 * feature (a string pointer by cl_param).
507 * It checks the format of the command-line, searches for a matching table
508 * and dissector. If a table/dissector match is not found, we display a
509 * summary of the available tables/dissectors (on stderr) and return FALSE.
510 * If everything is fine, we get the "Decode as" preference activated,
511 * then we return TRUE.
514 add_decode_as(const gchar *cl_param)
517 guint32 selector, selector2;
518 gchar *decoded_param;
519 gchar *remaining_param;
521 gchar *dissector_str;
522 dissector_handle_t dissector_matching;
523 dissector_table_t table_matching;
524 ftenum_t dissector_table_selector_type;
525 struct protocol_name_search user_protocol_name;
529 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
532 decoded_param = g_strdup(cl_param);
533 g_assert(decoded_param);
536 /* The lines below will parse this string (modifying it) to extract all
537 necessary information. Note that decoded_param is still needed since
538 strings are not copied - we just save pointers. */
540 /* This section extracts a layer type (table_name) from decoded_param */
541 table_name = decoded_param; /* Layer type string starts from beginning */
543 remaining_param = strchr(table_name, '=');
544 if (remaining_param == NULL) {
545 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
546 /* If the argument does not follow the template, carry on anyway to check
547 if the table name is at least correct. If remaining_param is NULL,
548 we'll exit anyway further down */
551 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
554 /* Remove leading and trailing spaces from the table name */
555 while ( table_name[0] == ' ' )
557 while ( table_name[strlen(table_name) - 1] == ' ' )
558 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
560 /* The following part searches a table matching with the layer type specified */
561 table_matching = NULL;
563 /* Look for the requested table */
564 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
565 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
568 table_matching = find_dissector_table(table_name);
569 if (!table_matching) {
570 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
574 if (!table_matching) {
575 /* Display a list of supported layer types to help the user, if the
576 specified layer type was not found */
577 cmdarg_err("Valid layer types are:");
578 fprint_all_layer_types(stderr);
580 if (remaining_param == NULL || !table_matching) {
581 /* Exit if the layer type was not found, or if no '=' separator was found
583 g_free(decoded_param);
587 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
588 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
591 remaining_param++; /* Move to the second '=' */
592 *remaining_param = '\0'; /* Remove the second '=' */
594 remaining_param++; /* Position after the layer type string */
596 /* This section extracts a selector value (selector_str) from decoded_param */
598 selector_str = remaining_param; /* Next part starts with the selector number */
600 remaining_param = strchr(selector_str, ',');
601 if (remaining_param == NULL) {
602 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
603 /* If the argument does not follow the template, carry on anyway to check
604 if the selector value is at least correct. If remaining_param is NULL,
605 we'll exit anyway further down */
608 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
611 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
613 switch (dissector_table_selector_type) {
619 /* The selector for this table is an unsigned number. Parse it as such.
620 There's no need to remove leading and trailing spaces from the
621 selector number string, because sscanf will do that for us. */
622 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
627 if (op != ':' && op != '-') {
628 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
629 g_free(decoded_param);
633 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
634 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
635 g_free(decoded_param);
639 else if (selector2 < selector) {
640 /* We could swap them for the user, but maybe it's better to call
641 * this out as an error in case it's not what was intended? */
642 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
643 g_free(decoded_param);
648 cmdarg_err("Invalid selector number \"%s\"", selector_str);
649 g_free(decoded_param);
656 /* The selector for this table is a string. */
660 /* There are currently no dissector tables with any types other
661 than the ones listed above. */
662 g_assert_not_reached();
665 if (remaining_param == NULL) {
666 /* Exit if no ',' separator was found (see above) */
667 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
668 fprint_all_protocols_for_layer_types(stderr, table_name);
669 g_free(decoded_param);
673 remaining_param++; /* Position after the selector number string */
675 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
677 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
679 /* Remove leading and trailing spaces from the dissector name */
680 while ( dissector_str[0] == ' ' )
682 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
683 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
685 dissector_matching = NULL;
687 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
688 if ( ! (*dissector_str) ) { /* Is the dissector name empty, if so, don't even search for a matching dissector and display all dissectors found for the selected table */
689 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
692 user_protocol_name.nb_match = 0;
693 user_protocol_name.searched_name = dissector_str;
694 user_protocol_name.matched_handle = NULL;
696 dissector_table_foreach_handle(table_name, find_protocol_name_func, &user_protocol_name); /* Go and perform the search for this dissector in the this table's dissectors' names and shortnames */
698 if (user_protocol_name.nb_match != 0) {
699 dissector_matching = user_protocol_name.matched_handle;
700 if (user_protocol_name.nb_match > 1) {
701 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
705 /* OK, check whether the problem is that there isn't any such
706 protocol, or that there is but it's not specified as a protocol
707 that's valid for that dissector table.
708 Note, we don't exit here, but dissector_matching will remain NULL,
710 if (proto_get_id_by_filter_name(dissector_str) == -1) {
711 /* No such protocol */
712 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
714 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
715 dissector_str, table_name);
720 if (!dissector_matching) {
721 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
722 fprint_all_protocols_for_layer_types(stderr, table_name);
723 g_free(decoded_param);
727 /* This is the end of the code that parses the command-line options.
728 All information is now stored in the variables:
732 The above variables that are strings are still pointing to areas within
733 decoded_parm. decoded_parm thus still needs to be kept allocated in
734 until we stop needing these variables
735 decoded_param will be deallocated at each exit point of this function */
738 /* We now have a pointer to the handle for the requested dissector
739 (requested protocol) inside the variable dissector_matching */
740 switch (dissector_table_selector_type) {
746 /* The selector for this table is an unsigned number. */
748 dissector_change_uint(table_name, selector, dissector_matching);
749 } else if (op == ':') {
750 for (i = selector; i < (guint64)selector + selector2; i++) {
751 dissector_change_uint(table_name, (guint32)i, dissector_matching);
753 } else { /* op == '-' */
754 for (i = selector; i <= selector2; i++) {
755 dissector_change_uint(table_name, (guint32)i, dissector_matching);
762 /* The selector for this table is a string. */
763 dissector_change_string(table_name, selector_str, dissector_matching);
767 /* There are currently no dissector tables with any types other
768 than the ones listed above. */
769 g_assert_not_reached();
771 g_free(decoded_param); /* "Decode As" rule has been successfully added */
776 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
777 const gchar *message, gpointer user_data)
779 /* ignore log message, if log_level isn't interesting based
780 upon the console log preferences.
781 If the preferences haven't been loaded loaded yet, display the
784 The default console_log_level preference value is such that only
785 ERROR, CRITICAL and WARNING level messages are processed;
786 MESSAGE, INFO and DEBUG level messages are ignored.
788 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
789 ERROR and CRITICAL level messages so the current code is a behavioral
790 change. The current behavior is the same as in Wireshark.
792 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
793 prefs.console_log_level != 0) {
797 g_log_default_handler(log_domain, log_level, message, user_data);
802 output_file_description(const char *fname)
804 char *save_file_string;
806 /* Get a string that describes what we're writing to */
807 if (strcmp(fname, "-") == 0) {
808 /* We're writing to the standard output */
809 save_file_string = g_strdup("standard output");
811 /* We're writing to a file with the name in save_file */
812 save_file_string = g_strdup_printf("file \"%s\"", fname);
814 return save_file_string;
818 print_current_user(void) {
819 gchar *cur_user, *cur_group;
821 if (started_with_special_privs()) {
822 cur_user = get_cur_username();
823 cur_group = get_cur_groupname();
824 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
825 cur_user, cur_group);
828 if (running_with_special_privs()) {
829 fprintf(stderr, " This could be dangerous.");
831 fprintf(stderr, "\n");
836 check_capture_privs(void) {
839 /* Warn the user if npf.sys isn't loaded. */
840 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
841 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
842 "capturing or\nlisting interfaces.\n");
848 show_version(GString *comp_info_str, GString *runtime_info_str)
850 printf("TShark " VERSION "%s\n"
857 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
858 runtime_info_str->str);
862 main(int argc, char *argv[])
864 GString *comp_info_str;
865 GString *runtime_info_str;
866 char *init_progfile_dir_error;
868 gboolean arg_error = FALSE;
874 char *gpf_path, *pf_path;
875 char *gdp_path, *dp_path;
876 int gpf_open_errno, gpf_read_errno;
877 int pf_open_errno, pf_read_errno;
878 int gdp_open_errno, gdp_read_errno;
879 int dp_open_errno, dp_read_errno;
881 volatile int exit_status = 0;
883 gboolean list_link_layer_types = FALSE;
884 gboolean start_capture = FALSE;
889 gboolean capture_option_specified = FALSE;
891 gboolean quiet = FALSE;
892 #ifdef PCAP_NG_DEFAULT
893 volatile int out_file_type = WTAP_FILE_PCAPNG;
895 volatile int out_file_type = WTAP_FILE_PCAP;
897 volatile gboolean out_file_name_res = FALSE;
898 gchar *volatile cf_name = NULL;
899 gchar *rfilter = NULL;
900 #ifdef HAVE_PCAP_OPEN_DEAD
901 struct bpf_program fcode;
903 dfilter_t *rfcode = NULL;
906 GLogLevelFlags log_flags;
908 gchar *output_only = NULL;
910 #ifdef HAVE_PCAP_REMOTE
911 #define OPTSTRING_A "A:"
913 #define OPTSTRING_A ""
916 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
917 #define OPTSTRING_B "B:"
919 #define OPTSTRING_B ""
920 #endif /* _WIN32 or HAVE_PCAP_CREATE */
921 #else /* HAVE_LIBPCAP */
922 #define OPTSTRING_B ""
923 #endif /* HAVE_LIBPCAP */
925 #ifdef HAVE_PCAP_CREATE
926 #define OPTSTRING_I "I"
928 #define OPTSTRING_I ""
931 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:z:"
933 static const char optstring[] = OPTSTRING;
935 /* Assemble the compile-time version information string */
936 comp_info_str = g_string_new("Compiled ");
937 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
939 /* Assemble the run-time version information string */
940 runtime_info_str = g_string_new("Running ");
941 get_runtime_version_info(runtime_info_str, NULL);
943 /* Add it to the information to be reported on a crash. */
944 ws_add_crash_info("TShark " VERSION "%s\n"
949 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
952 arg_list_utf_16to8(argc, argv);
953 #if !GLIB_CHECK_VERSION(2,31,0)
959 * Get credential information for later use.
961 init_process_policies();
964 * Attempt to get the pathname of the executable file.
966 init_progfile_dir_error = init_progfile_dir(argv[0], main);
967 if (init_progfile_dir_error != NULL) {
968 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
969 init_progfile_dir_error);
973 * In order to have the -X opts assigned before the wslua machine starts
974 * we need to call getopts before epan_init() gets called.
977 optind_initial = optind;
979 while ((opt = getopt(argc, argv, optstring)) != -1) {
981 case 'C': /* Configuration Profile */
982 if (profile_exists (optarg, FALSE)) {
983 set_profile_name (optarg);
985 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
989 case 'P': /* Print packet summary info even when writing to a file */
990 print_packet_info = TRUE;
991 print_summary = TRUE;
993 case 'O': /* Only output these protocols */
994 output_only = g_strdup(optarg);
996 case 'V': /* Verbose */
997 print_details = TRUE;
998 print_packet_info = TRUE;
1000 case 'x': /* Print packet data in hex (and ASCII) */
1002 /* The user asked for hex output, so let's ensure they get it,
1003 * even if they're writing to a file.
1005 print_packet_info = TRUE;
1016 * Print packet summary information is the default, unless either -V or -x
1017 * were specified and -P was not. Note that this is new behavior, which
1018 * allows for the possibility of printing only hex/ascii output without
1019 * necessarily requiring that either the summary or details be printed too.
1021 if (print_summary == -1)
1022 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1024 optind = optind_initial;
1029 /** Send All g_log messages to our own handler **/
1033 G_LOG_LEVEL_CRITICAL|
1034 G_LOG_LEVEL_WARNING|
1035 G_LOG_LEVEL_MESSAGE|
1038 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1040 g_log_set_handler(NULL,
1042 tshark_log_handler, NULL /* user_data */);
1043 g_log_set_handler(LOG_DOMAIN_MAIN,
1045 tshark_log_handler, NULL /* user_data */);
1048 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1050 tshark_log_handler, NULL /* user_data */);
1051 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1053 tshark_log_handler, NULL /* user_data */);
1056 initialize_funnel_ops();
1059 capture_opts_init(&global_capture_opts, &cfile);
1062 timestamp_set_type(TS_RELATIVE);
1063 timestamp_set_precision(TS_PREC_AUTO);
1064 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1066 /* Register all dissectors; we must do this before checking for the
1067 "-G" flag, as the "-G" flag dumps information registered by the
1068 dissectors, and we must do it before we read the preferences, in
1069 case any dissectors register preferences. */
1070 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1071 failure_message, open_failure_message, read_failure_message,
1072 write_failure_message);
1074 /* Register all tap listeners; we do this before we parse the arguments,
1075 as the "-z" argument can specify a registered tap. */
1077 /* we register the plugin taps before the other taps because
1078 stats_tree taps plugins will be registered as tap listeners
1079 by stats_tree_stat.c and need to registered before that */
1081 register_all_plugin_tap_listeners();
1083 register_all_tap_listeners();
1085 /* If invoked with the "-G" flag, we dump out information based on
1086 the argument to the "-G" flag; if no argument is specified,
1087 for backwards compatibility we dump out a glossary of display
1090 XXX - we do this here, for now, to support "-G" with no arguments.
1091 If none of our build or other processes uses "-G" with no arguments,
1092 we can just process it with the other arguments. */
1093 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1094 proto_initialize_all_prefixes();
1097 proto_registrar_dump_fields(1);
1099 if (strcmp(argv[2], "fields") == 0)
1100 proto_registrar_dump_fields(1);
1101 else if (strcmp(argv[2], "fields2") == 0)
1102 proto_registrar_dump_fields(2);
1103 else if (strcmp(argv[2], "fields3") == 0)
1104 proto_registrar_dump_fields(3);
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);
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 \"r\" for relative, \"a\" for absolute,");
1410 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1414 case 'T': /* printing Type */
1415 if (strcmp(optarg, "text") == 0) {
1416 output_action = WRITE_TEXT;
1417 print_format = PR_FMT_TEXT;
1418 } else if (strcmp(optarg, "ps") == 0) {
1419 output_action = WRITE_TEXT;
1420 print_format = PR_FMT_PS;
1421 } else if (strcmp(optarg, "pdml") == 0) {
1422 output_action = WRITE_XML;
1423 print_details = TRUE; /* Need details */
1424 print_summary = FALSE; /* Don't allow summary */
1425 } else if (strcmp(optarg, "psml") == 0) {
1426 output_action = WRITE_XML;
1427 print_details = FALSE; /* Don't allow details */
1428 print_summary = TRUE; /* Need summary */
1429 } else if (strcmp(optarg, "fields") == 0) {
1430 output_action = WRITE_FIELDS;
1431 print_details = TRUE; /* Need full tree info */
1432 print_summary = FALSE; /* Don't allow summary */
1434 cmdarg_err("Invalid -T parameter.");
1435 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1439 case 'u': /* Seconds type */
1440 if (strcmp(optarg, "s") == 0)
1441 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1442 else if (strcmp(optarg, "hms") == 0)
1443 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1445 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1446 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1450 case 'v': /* Show version and exit */
1452 show_version(comp_info_str, runtime_info_str);
1453 g_string_free(comp_info_str, TRUE);
1454 g_string_free(runtime_info_str, TRUE);
1455 /* We don't really have to cleanup here, but it's a convenient way to test
1456 * start-up and shut-down of the epan library without any UI-specific
1457 * cruft getting in the way. Makes the results of running
1458 * $ ./tools/valgrind-wireshark -n
1459 * much more useful. */
1463 case 'O': /* Only output these protocols */
1464 /* already processed; just ignore it now */
1466 case 'V': /* Verbose */
1467 /* already processed; just ignore it now */
1469 case 'x': /* Print packet data in hex (and ASCII) */
1470 /* already processed; just ignore it now */
1475 /* We won't call the init function for the stat this soon
1476 as it would disallow MATE's fields (which are registered
1477 by the preferences set callback) from being used as
1478 part of a tap filter. Instead, we just add the argument
1479 to a list of stat arguments. */
1480 if (!process_stat_cmd_arg(optarg)) {
1481 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1482 cmdarg_err_cont(" -z argument must be one of :");
1483 list_stat_cmd_args();
1488 case '?': /* Bad flag - print usage message */
1491 list_capture_types();
1501 /* If we specified output fields, but not the output field type... */
1502 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1503 cmdarg_err("Output fields were specified with \"-e\", "
1504 "but \"-Tfields\" was not specified.");
1506 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1507 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1508 "specified with \"-e\".");
1513 /* If no capture filter or read filter has been specified, and there are
1514 still command-line arguments, treat them as the tokens of a capture
1515 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1516 flag was specified. */
1517 if (optind < argc) {
1518 if (cf_name != NULL) {
1519 if (rfilter != NULL) {
1520 cmdarg_err("Read filters were specified both with \"-R\" "
1521 "and with additional command-line arguments.");
1524 rfilter = get_args_as_string(argc, argv, optind);
1529 if (global_capture_opts.default_options.cfilter) {
1530 cmdarg_err("A default capture filter was specified both with \"-f\""
1531 " and with additional command-line arguments.");
1534 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1535 interface_options interface_opts;
1536 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1537 if (interface_opts.cfilter == NULL) {
1538 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1539 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1540 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1542 cmdarg_err("A capture filter was specified both with \"-f\""
1543 " and with additional command-line arguments.");
1547 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1549 capture_option_specified = TRUE;
1555 if (!global_capture_opts.saving_to_file) {
1556 /* We're not saving the capture to a file; if "-q" wasn't specified,
1557 we should print packet information */
1559 print_packet_info = TRUE;
1561 /* We're saving to a file; if we're writing to the standard output.
1562 and we'll also be writing dissected packets to the standard
1563 output, reject the request. At best, we could redirect that
1564 to the standard error; we *can't* write both to the standard
1565 output and have either of them be useful. */
1566 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1567 cmdarg_err("You can't write both raw packet data and dissected packets"
1568 " to the standard output.");
1573 /* We're not saving the capture to a file; if "-q" wasn't specified,
1574 we should print packet information */
1576 print_packet_info = TRUE;
1579 #ifndef HAVE_LIBPCAP
1580 if (capture_option_specified)
1581 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1588 /* We don't support capture filters when reading from a capture file
1589 (the BPF compiler doesn't support all link-layer types that we
1590 support in capture files we read). */
1592 if (cf_name != NULL) {
1593 if (global_capture_opts.default_options.cfilter) {
1594 cmdarg_err("Only read filters, not capture filters, "
1595 "can be specified when reading a capture file.");
1602 if (output_action != WRITE_TEXT) {
1603 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1608 if (output_only != NULL) {
1611 if (!print_details) {
1612 cmdarg_err("-O requires -V");
1616 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1617 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1618 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1623 if (list_link_layer_types) {
1624 /* We're supposed to list the link-layer types for an interface;
1625 did the user also specify a capture file to be read? */
1627 /* Yes - that's bogus. */
1628 cmdarg_err("You can't specify -L and a capture file to be read.");
1631 /* No - did they specify a ring buffer option? */
1632 if (global_capture_opts.multi_files_on) {
1633 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1639 * "-r" was specified, so we're reading a capture file.
1640 * Capture options don't apply here.
1642 if (global_capture_opts.multi_files_on) {
1643 cmdarg_err("Multiple capture files requested, but "
1644 "a capture isn't being done.");
1647 if (global_capture_opts.has_file_duration) {
1648 cmdarg_err("Switching capture files after a time interval was specified, but "
1649 "a capture isn't being done.");
1652 if (global_capture_opts.has_ring_num_files) {
1653 cmdarg_err("A ring buffer of capture files was specified, but "
1654 "a capture isn't being done.");
1657 if (global_capture_opts.has_autostop_files) {
1658 cmdarg_err("A maximum number of capture files was specified, but "
1659 "a capture isn't being done.");
1663 /* Note: TShark now allows the restriction of a _read_ file by packet count
1664 * and byte count as well as a write file. Other autostop options remain valid
1665 * only for a write file.
1667 if (global_capture_opts.has_autostop_duration) {
1668 cmdarg_err("A maximum capture time was specified, but "
1669 "a capture isn't being done.");
1674 * "-r" wasn't specified, so we're doing a live capture.
1676 if (global_capture_opts.saving_to_file) {
1677 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1679 /* When capturing, we only support writing pcap or pcap-ng format. */
1680 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1681 cmdarg_err("Live captures can only be saved in libpcap format.");
1684 if (global_capture_opts.multi_files_on) {
1685 /* Multiple-file mode doesn't work under certain conditions:
1686 a) it doesn't work if you're writing to the standard output;
1687 b) it doesn't work if you're writing to a pipe;
1689 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1690 cmdarg_err("Multiple capture files requested, but "
1691 "the capture is being written to the standard output.");
1694 if (global_capture_opts.output_to_pipe) {
1695 cmdarg_err("Multiple capture files requested, but "
1696 "the capture file is a pipe.");
1699 if (!global_capture_opts.has_autostop_filesize &&
1700 !global_capture_opts.has_file_duration) {
1701 cmdarg_err("Multiple capture files requested, but "
1702 "no maximum capture file size or duration was specified.");
1706 /* Currently, we don't support read filters when capturing
1707 and saving the packets. */
1708 if (rfilter != NULL) {
1709 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1713 /* They didn't specify a "-w" flag, so we won't be saving to a
1714 capture file. Check for options that only make sense if
1715 we're saving to a file. */
1716 if (global_capture_opts.has_autostop_filesize) {
1717 cmdarg_err("Maximum capture file size specified, but "
1718 "capture isn't being saved to a file.");
1721 if (global_capture_opts.multi_files_on) {
1722 cmdarg_err("Multiple capture files requested, but "
1723 "the capture isn't being saved to a file.");
1732 /* Start windows sockets */
1733 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1736 /* Notify all registered modules that have had any of their preferences
1737 changed either from one of the preferences file or from the command
1738 line that their preferences have changed. */
1741 /* At this point MATE will have registered its field array so we can
1742 have a tap filter with one of MATE's late-registered fields as part
1743 of the filter. We can now process all the "-z" arguments. */
1744 start_requested_stats();
1747 /* We currently don't support taps, or printing dissected packets,
1748 if we're writing to a pipe. */
1749 if (global_capture_opts.saving_to_file &&
1750 global_capture_opts.output_to_pipe) {
1751 if (tap_listeners_require_dissection()) {
1752 cmdarg_err("Taps aren't supported when saving to a pipe.");
1755 if (print_packet_info) {
1756 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1762 /* disabled protocols as per configuration file */
1763 if (gdp_path == NULL && dp_path == NULL) {
1764 set_disabled_protos_list();
1767 /* Build the column format array */
1768 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1771 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1772 capture_opts_trim_ring_num_files(&global_capture_opts);
1775 if (rfilter != NULL) {
1776 if (!dfilter_compile(rfilter, &rfcode)) {
1777 cmdarg_err("%s", dfilter_error_msg);
1779 #ifdef HAVE_PCAP_OPEN_DEAD
1783 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1785 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1787 " Note: That display filter code looks like a valid capture filter;");
1789 " maybe you mixed them up?");
1798 cfile.rfcode = rfcode;
1800 if (print_packet_info) {
1801 /* If we're printing as text or PostScript, we have
1802 to create a print stream. */
1803 if (output_action == WRITE_TEXT) {
1804 switch (print_format) {
1807 print_stream = print_stream_text_stdio_new(stdout);
1811 print_stream = print_stream_ps_stdio_new(stdout);
1815 g_assert_not_reached();
1820 /* We have to dissect each packet if:
1822 we're printing information about each packet;
1824 we're using a read filter on the packets;
1826 we're using any taps that need dissection. */
1827 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1831 * We're reading a capture file.
1835 * Immediately relinquish any special privileges we have; we must not
1836 * be allowed to read any capture files the user running TShark
1839 relinquish_special_privs_perm();
1840 print_current_user();
1842 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1847 /* Set timestamp precision; there should arguably be a command-line
1848 option to let the user set this. */
1849 switch(wtap_file_tsprecision(cfile.wth)) {
1850 case(WTAP_FILE_TSPREC_SEC):
1851 timestamp_set_precision(TS_PREC_AUTO_SEC);
1853 case(WTAP_FILE_TSPREC_DSEC):
1854 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1856 case(WTAP_FILE_TSPREC_CSEC):
1857 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1859 case(WTAP_FILE_TSPREC_MSEC):
1860 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1862 case(WTAP_FILE_TSPREC_USEC):
1863 timestamp_set_precision(TS_PREC_AUTO_USEC);
1865 case(WTAP_FILE_TSPREC_NSEC):
1866 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1869 g_assert_not_reached();
1872 /* Process the packets in the file */
1875 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1876 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1877 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1879 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1882 CATCH(OutOfMemoryError) {
1886 "Sorry, but TShark has to terminate now!\n"
1888 "Some infos / workarounds can be found at:\n"
1889 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1894 /* We still dump out the results of taps, etc., as we might have
1895 read some packets; however, we exit with an error status. */
1899 /* No capture file specified, so we're supposed to do a live capture
1900 (or get a list of link-layer types for a live capture device);
1901 do we have support for live captures? */
1903 /* trim the interface name and exit if that failed */
1904 exit_status = capture_opts_trim_iface(&global_capture_opts,
1905 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1906 if (exit_status != 0)
1909 /* if requested, list the link layer types and exit */
1910 if (list_link_layer_types) {
1913 /* Get the list of link-layer types for the capture devices. */
1914 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1915 interface_options interface_opts;
1916 if_capabilities_t *caps;
1918 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1919 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1921 cmdarg_err("%s", err_str);
1925 if (caps->data_link_types == NULL) {
1926 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1929 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1930 free_if_capabilities(caps);
1935 if (print_packet_info) {
1936 if (!write_preamble(NULL)) {
1937 show_print_file_io_error(errno);
1940 } else if (!quiet) {
1942 * We're not printing information for each packet, and the user
1943 * didn't ask us not to print a count of packets as they arrive,
1944 * so print that count so the user knows that packets are arriving.
1946 * XXX - what if the user wants to do a live capture, doesn't want
1947 * to save it to a file, doesn't want information printed for each
1948 * packet, does want some "-z" statistic, and wants packet counts
1949 * so they know whether they're seeing any packets?
1951 print_packet_counts = TRUE;
1954 /* For now, assume libpcap gives microsecond precision. */
1955 timestamp_set_precision(TS_PREC_AUTO_USEC);
1958 * XXX - this returns FALSE if an error occurred, but it also
1959 * returns FALSE if the capture stops because a time limit
1960 * was reached (and possibly other limits), so we can't assume
1961 * it means an error.
1963 * The capture code is a bit twisty, so it doesn't appear to
1964 * be an easy fix. We just ignore the return value for now.
1965 * Instead, pass on the exit status from the capture child.
1968 exit_status = global_capture_opts.fork_child_status;
1970 if (print_packet_info) {
1971 if (!write_finale()) {
1973 show_print_file_io_error(err);
1977 /* No - complain. */
1978 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1985 if (cfile.frames != NULL) {
1986 free_frame_data_sequence(cfile.frames);
1987 cfile.frames = NULL;
1990 draw_tap_listeners(TRUE);
1991 funnel_dump_all_text_windows();
1994 output_fields_free(output_fields);
1995 output_fields = NULL;
2000 /*#define USE_BROKEN_G_MAIN_LOOP*/
2002 #ifdef USE_BROKEN_G_MAIN_LOOP
2005 gboolean loop_running = FALSE;
2007 guint32 packet_count = 0;
2010 /* XXX - move to the right position / file */
2011 /* read from a pipe (callback) */
2012 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2014 typedef struct pipe_input_tag {
2018 pipe_input_cb_t input_cb;
2019 guint pipe_input_id;
2021 GMutex *callback_running;
2025 static pipe_input_t pipe_input;
2028 /* The timer has expired, see if there's stuff to read from the pipe,
2029 if so, do the callback */
2031 pipe_timer_cb(gpointer data)
2037 pipe_input_t *pipe_input_p = data;
2038 gint iterations = 0;
2040 g_mutex_lock (pipe_input_p->callback_running);
2042 /* try to read data from the pipe only 5 times, to avoid blocking */
2043 while(iterations < 5) {
2044 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2046 /* Oddly enough although Named pipes don't work on win9x,
2047 PeekNamedPipe does !!! */
2048 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2049 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2051 /* Get the child process exit status */
2052 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2055 /* If the Peek returned an error, or there are bytes to be read
2056 or the childwatcher thread has terminated then call the normal
2058 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2060 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2062 /* And call the real handler */
2063 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2064 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2065 /* pipe closed, return false so that the timer is stopped */
2066 g_mutex_unlock (pipe_input_p->callback_running);
2071 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2072 /* No data, stop now */
2079 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2081 g_mutex_unlock (pipe_input_p->callback_running);
2083 /* we didn't stopped the timer, so let it run */
2090 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2093 pipe_input.source = source;
2094 pipe_input.child_process = child_process;
2095 pipe_input.user_data = user_data;
2096 pipe_input.input_cb = input_cb;
2099 #if GLIB_CHECK_VERSION(2,31,0)
2100 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2101 g_mutex_init(pipe_input.callback_running);
2103 pipe_input.callback_running = g_mutex_new();
2105 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2106 do this but that doesn't cover all win32 platforms. GTK can do
2107 this but doesn't seem to work over processes. Attempt to do
2108 something similar here, start a timer and check for data on every
2110 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2111 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2122 GString *str = g_string_new("");
2123 #ifdef USE_TSHARK_SELECT
2127 struct sigaction action, oldaction;
2131 * XXX - dropping privileges is still required, until code cleanup is done
2133 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2134 * when it's done, we don't need special privileges to run tshark at all,
2135 * therefore we don't need to drop these privileges
2136 * The only thing we might want to keep is a warning if tshark is run as root,
2137 * as it's no longer necessary and potentially dangerous.
2139 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2140 * We've opened the capture device, so we shouldn't need any special
2141 * privileges any more; relinquish those privileges.
2143 * XXX - if we have saved set-user-ID support, we should give up those
2144 * privileges immediately, and then reclaim them long enough to get
2145 * a list of network interfaces and to open one, and then give them
2146 * up again, so that stuff we do while processing the argument list,
2147 * reading the user's preferences, loading and starting plugins
2148 * (especially *user* plugins), etc. is done with the user's privileges,
2149 * not special privileges.
2151 relinquish_special_privs_perm();
2152 print_current_user();
2154 /* Cleanup all data structures used for dissection. */
2155 cleanup_dissection();
2156 /* Initialize all data structures used for dissection. */
2160 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2161 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2163 /* Catch SIGINT and SIGTERM and, if we get either of them,
2164 clean up and exit. If SIGHUP isn't being ignored, catch
2165 it too and, if we get it, clean up and exit.
2167 We restart any read that was in progress, so that it doesn't
2168 disrupt reading from the sync pipe. The signal handler tells
2169 the capture child to finish; it will report that it finished,
2170 or will exit abnormally, so we'll stop reading from the sync
2171 pipe, pick up the exit status, and quit. */
2172 memset(&action, 0, sizeof(action));
2173 action.sa_handler = capture_cleanup;
2174 action.sa_flags = SA_RESTART;
2175 sigemptyset(&action.sa_mask);
2176 sigaction(SIGTERM, &action, NULL);
2177 sigaction(SIGINT, &action, NULL);
2178 sigaction(SIGHUP, NULL, &oldaction);
2179 if (oldaction.sa_handler == SIG_DFL)
2180 sigaction(SIGHUP, &action, NULL);
2183 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2184 quiet mode, report the number of packets we've captured.
2186 Again, restart any read that was in progress, so that it doesn't
2187 disrupt reading from the sync pipe. */
2188 action.sa_handler = report_counts_siginfo;
2189 action.sa_flags = SA_RESTART;
2190 sigemptyset(&action.sa_mask);
2191 sigaction(SIGINFO, &action, NULL);
2192 #endif /* SIGINFO */
2195 global_capture_opts.state = CAPTURE_PREPARING;
2197 /* Let the user know which interfaces were chosen. */
2198 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2199 interface_options interface_opts;
2201 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2202 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2203 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2204 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2207 if (global_capture_opts.ifaces->len < 2) {
2209 if (global_capture_opts.ifaces->len < 4) {
2211 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2212 interface_options interface_opts;
2214 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2216 if (global_capture_opts.ifaces->len > 2) {
2217 g_string_append_printf(str, ",");
2219 g_string_append_printf(str, " ");
2220 if (i == global_capture_opts.ifaces->len - 1) {
2221 g_string_append_printf(str, "and ");
2224 g_string_append_printf(str, "'%s'", interface_opts.descr);
2227 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2229 if (really_quiet == FALSE)
2230 fprintf(stderr, "Capturing on %s\n", str->str);
2232 g_string_free(str, TRUE);
2234 ret = sync_pipe_start(&global_capture_opts);
2239 /* the actual capture loop
2241 * XXX - glib doesn't seem to provide any event based loop handling.
2243 * XXX - for whatever reason,
2244 * calling g_main_loop_new() ends up in 100% cpu load.
2246 * But that doesn't matter: in UNIX we can use select() to find an input
2247 * source with something to do.
2249 * But that doesn't matter because we're in a CLI (that doesn't need to
2250 * update a GUI or something at the same time) so it's OK if we block
2251 * trying to read from the pipe.
2253 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2254 * wrong (but I leave it there in case I am...).
2257 #ifdef USE_TSHARK_SELECT
2259 FD_SET(pipe_input.source, &readfds);
2262 loop_running = TRUE;
2266 while (loop_running)
2268 #ifdef USE_TSHARK_SELECT
2269 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2275 } else if (ret == 1) {
2277 /* Call the real handler */
2278 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2279 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2282 #ifdef USE_TSHARK_SELECT
2287 CATCH(OutOfMemoryError) {
2291 "Sorry, but TShark has to terminate now!\n"
2293 "Some infos / workarounds can be found at:\n"
2294 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2302 /* XXX - move the call to main_window_update() out of capture_sync.c */
2303 /* dummy for capture_sync.c to make linker happy */
2304 void main_window_update(void)
2308 /* capture child detected an error */
2310 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2312 cmdarg_err("%s", error_msg);
2313 cmdarg_err_cont("%s", secondary_error_msg);
2317 /* capture child detected an capture filter related error */
2319 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2321 dfilter_t *rfcode = NULL;
2322 interface_options interface_opts;
2324 g_assert(i < capture_opts->ifaces->len);
2325 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2327 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2329 "Invalid capture filter \"%s\" for interface %s!\n"
2331 "That string looks like a valid display filter; however, it isn't a valid\n"
2332 "capture filter (%s).\n"
2334 "Note that display filters and capture filters don't have the same syntax,\n"
2335 "so you can't use most display filter expressions as capture filters.\n"
2337 "See the User's Guide for a description of the capture filter syntax.",
2338 interface_opts.cfilter, interface_opts.descr, error_message);
2339 dfilter_free(rfcode);
2342 "Invalid capture filter \"%s\" for interface %s!\n"
2344 "That string isn't a valid capture filter (%s).\n"
2345 "See the User's Guide for a description of the capture filter syntax.",
2346 interface_opts.cfilter, interface_opts.descr, error_message);
2351 /* capture child tells us we have a new (or the first) capture file */
2353 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2355 gboolean is_tempfile;
2358 if (capture_opts->state == CAPTURE_PREPARING) {
2359 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2361 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2363 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2365 /* free the old filename */
2366 if (capture_opts->save_file != NULL) {
2368 /* we start a new capture file, close the old one (if we had one before) */
2369 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2370 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2371 wtap_close(((capture_file *) capture_opts->cf)->wth);
2373 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2376 g_free(capture_opts->save_file);
2377 is_tempfile = FALSE;
2379 /* we didn't had a save_file before, must be a tempfile */
2383 /* save the new filename */
2384 capture_opts->save_file = g_strdup(new_file);
2386 /* if we are in real-time mode, open the new file now */
2387 if (do_dissection) {
2388 /* Attempt to open the capture file and set up to read from it. */
2389 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2393 /* Don't unlink (delete) the save file - leave it around,
2394 for debugging purposes. */
2395 g_free(capture_opts->save_file);
2396 capture_opts->save_file = NULL;
2401 capture_opts->state = CAPTURE_RUNNING;
2407 /* capture child tells us we have new packets to read */
2409 capture_input_new_packets(capture_options *capture_opts, int to_read)
2415 capture_file *cf = capture_opts->cf;
2416 gboolean filtering_tap_listeners;
2421 * Prevent a SIGINFO handler from writing to the standard error while
2422 * we're doing so or writing to the standard output; instead, have it
2423 * just set a flag telling us to print that information when we're done.
2426 #endif /* SIGINFO */
2428 /* Do we have any tap listeners with filters? */
2429 filtering_tap_listeners = have_filtering_tap_listeners();
2431 /* Get the union of the flags for all tap listeners. */
2432 tap_flags = union_of_tap_listener_flags();
2434 if (do_dissection) {
2435 while (to_read-- && cf->wth) {
2436 wtap_cleareof(cf->wth);
2437 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2439 /* read from file failed, tell the capture child to stop */
2440 sync_pipe_stop(capture_opts);
2441 wtap_close(cf->wth);
2444 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2445 wtap_buf_ptr(cf->wth),
2446 filtering_tap_listeners, tap_flags);
2449 /* packet successfully read and gone through the "Read Filter" */
2455 * Dumpcap's doing all the work; we're not doing any dissection.
2456 * Count all the packets it wrote.
2458 packet_count += to_read;
2461 if (print_packet_counts) {
2462 /* We're printing packet counts. */
2463 if (packet_count != 0) {
2464 fprintf(stderr, "\r%u ", packet_count);
2465 /* stderr could be line buffered */
2472 * Allow SIGINFO handlers to write.
2477 * If a SIGINFO handler asked us to write out capture counts, do so.
2481 #endif /* SIGINFO */
2487 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2488 /* Report the count only if we aren't printing a packet count
2489 as packets arrive. */
2490 fprintf(stderr, "%u packet%s captured\n", packet_count,
2491 plurality(packet_count, "", "s"));
2494 infoprint = FALSE; /* we just reported it */
2495 #endif /* SIGINFO */
2500 report_counts_siginfo(int signum _U_)
2502 int sav_errno = errno;
2503 /* If we've been told to delay printing, just set a flag asking
2504 that we print counts (if we're supposed to), otherwise print
2505 the count of packets captured (if we're supposed to). */
2512 #endif /* SIGINFO */
2515 /* capture child detected any packet drops? */
2517 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2519 if (print_packet_counts) {
2520 /* We're printing packet counts to stderr.
2521 Send a newline so that we move to the line after the packet count. */
2522 fprintf(stderr, "\n");
2526 /* We're printing packet counts to stderr.
2527 Send a newline so that we move to the line after the packet count. */
2528 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2534 * Capture child closed its side of the pipe, report any error and
2535 * do the required cleanup.
2538 capture_input_closed(capture_options *capture_opts, gchar *msg)
2540 capture_file *cf = (capture_file *) capture_opts->cf;
2543 fprintf(stderr, "tshark: %s\n", msg);
2547 if (cf != NULL && cf->wth != NULL) {
2548 wtap_close(cf->wth);
2549 if (cf->is_tempfile) {
2550 ws_unlink(cf->filename);
2553 #ifdef USE_BROKEN_G_MAIN_LOOP
2554 /*g_main_loop_quit(loop);*/
2557 loop_running = FALSE;
2566 capture_cleanup(DWORD ctrltype _U_)
2568 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2569 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2570 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2571 like SIGTERM at least when the machine's shutting down.
2573 For now, we handle them all as indications that we should clean up
2574 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2577 We must return TRUE so that no other handler - such as one that would
2578 terminate the process - gets called.
2580 XXX - for some reason, typing ^C to TShark, if you run this in
2581 a Cygwin console window in at least some versions of Cygwin,
2582 causes TShark to terminate immediately; this routine gets
2583 called, but the main loop doesn't get a chance to run and
2584 exit cleanly, at least if this is compiled with Microsoft Visual
2585 C++ (i.e., it's a property of the Cygwin console window or Bash;
2586 it happens if TShark is not built with Cygwin - for all I know,
2587 building it with Cygwin may make the problem go away). */
2589 /* tell the capture child to stop */
2590 sync_pipe_stop(&global_capture_opts);
2592 /* don't stop our own loop already here, otherwise status messages and
2593 * cleanup wouldn't be done properly. The child will indicate the stop of
2594 * everything by calling capture_input_closed() later */
2600 capture_cleanup(int signum _U_)
2602 /* tell the capture child to stop */
2603 sync_pipe_stop(&global_capture_opts);
2605 /* don't stop our own loop already here, otherwise status messages and
2606 * cleanup wouldn't be done properly. The child will indicate the stop of
2607 * everything by calling capture_input_closed() later */
2610 #endif /* HAVE_LIBPCAP */
2613 process_packet_first_pass(capture_file *cf,
2614 gint64 offset, struct wtap_pkthdr *whdr,
2619 gboolean create_proto_tree = FALSE;
2623 /* The frame number of this packet is one more than the count of
2624 frames in this packet. */
2625 framenum = cf->count + 1;
2627 /* If we're not running a display filter and we're not printing any
2628 packet information, we don't need to do a dissection. This means
2629 that all packets can be marked as 'passed'. */
2632 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2634 /* If we're going to print packet information, or we're going to
2635 run a read filter, or we're going to process taps, set up to
2636 do a dissection and do so. */
2637 if (do_dissection) {
2638 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2639 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2640 /* Grab any resolved addresses */
2641 host_name_lookup_process();
2643 /* If we're going to be applying a read filter, we'll need to
2644 create a protocol tree against which to apply the filter. */
2646 create_proto_tree = TRUE;
2648 /* We're not going to display the protocol tree on this pass,
2649 so it's not going to be "visible". */
2650 epan_dissect_init(&edt, create_proto_tree, FALSE);
2652 /* If we're running a read filter, prime the epan_dissect_t with that
2655 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2657 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2658 &first_ts, prev_dis, prev_cap);
2660 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2662 /* Run the read filter if we have one. */
2664 passed = dfilter_apply_edt(cf->rfcode, &edt);
2668 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2669 prev_dis_frame = fdlocal;
2670 prev_dis = &prev_dis_frame;
2671 frame_data_sequence_add(cf->frames, &fdlocal);
2675 prev_cap_frame = fdlocal;
2676 prev_cap = &prev_cap_frame;
2679 epan_dissect_cleanup(&edt);
2685 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2686 struct wtap_pkthdr *phdr, const guchar *pd,
2687 gboolean filtering_tap_listeners, guint tap_flags)
2689 gboolean create_proto_tree;
2694 /* If we're not running a display filter and we're not printing any
2695 packet information, we don't need to do a dissection. This means
2696 that all packets can be marked as 'passed'. */
2699 /* If we're going to print packet information, or we're going to
2700 run a read filter, or we're going to process taps, set up to
2701 do a dissection and do so. */
2702 if (do_dissection) {
2703 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2704 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2705 /* Grab any resolved addresses */
2706 host_name_lookup_process();
2708 if (cf->rfcode || print_details || filtering_tap_listeners ||
2709 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2710 create_proto_tree = TRUE;
2712 create_proto_tree = FALSE;
2714 /* The protocol tree will be "visible", i.e., printed, only if we're
2715 printing packet details, which is true if we're printing stuff
2716 ("print_packet_info" is true) and we're in verbose mode
2717 ("packet_details" is true). */
2718 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2720 /* If we're running a read filter, prime the epan_dissect_t with that
2723 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2725 col_custom_prime_edt(&edt, &cf->cinfo);
2727 /* We only need the columns if either
2728 1) some tap needs the columns
2730 2) we're printing packet info but we're *not* verbose; in verbose
2731 mode, we print the protocol tree, not the protocol summary.
2733 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2738 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2740 /* Run the read filter if we have one. */
2742 passed = dfilter_apply_edt(cf->rfcode, &edt);
2746 /* Process this packet. */
2747 if (print_packet_info) {
2748 /* We're printing packet information; print the information for
2751 print_packet(cf, &edt);
2753 print_packet(cf, NULL);
2755 /* The ANSI C standard does not appear to *require* that a line-buffered
2756 stream be flushed to the host environment whenever a newline is
2757 written, it just says that, on such a stream, characters "are
2758 intended to be transmitted to or from the host environment as a
2759 block when a new-line character is encountered".
2761 The Visual C++ 6.0 C implementation doesn't do what is intended;
2762 even if you set a stream to be line-buffered, it still doesn't
2763 flush the buffer at the end of every line.
2765 So, if the "-l" flag was specified, we flush the standard output
2766 at the end of a packet. This will do the right thing if we're
2767 printing packet summary lines, and, as we print the entire protocol
2768 tree for a single packet without waiting for anything to happen,
2769 it should be as good as line-buffered mode if we're printing
2770 protocol trees. (The whole reason for the "-l" flag in either
2771 tcpdump or TShark is to allow the output of a live capture to
2772 be piped to a program or script and to have that script see the
2773 information for the packet as soon as it's printed, rather than
2774 having to wait until a standard I/O buffer fills up. */
2778 if (ferror(stdout)) {
2779 show_print_file_io_error(errno);
2785 if (do_dissection) {
2786 epan_dissect_cleanup(&edt);
2792 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2793 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2796 int snapshot_length;
2800 gchar *err_info = NULL;
2802 char *save_file_string = NULL;
2803 gboolean filtering_tap_listeners;
2805 wtapng_section_t *shb_hdr;
2806 wtapng_iface_descriptions_t *idb_inf;
2809 shb_hdr = wtap_file_get_shb_info(cf->wth);
2810 idb_inf = wtap_file_get_idb_info(cf->wth);
2811 #ifdef PCAP_NG_DEFAULT
2812 if (idb_inf->number_of_interfaces > 0) {
2813 linktype = WTAP_ENCAP_PER_PACKET;
2815 linktype = wtap_file_encap(cf->wth);
2818 linktype = wtap_file_encap(cf->wth);
2820 if (save_file != NULL) {
2821 /* Get a string that describes what we're writing to */
2822 save_file_string = output_file_description(save_file);
2824 /* Set up to write to the capture file. */
2825 snapshot_length = wtap_snapshot_length(cf->wth);
2826 if (snapshot_length == 0) {
2827 /* Snapshot length of input file not known. */
2828 snapshot_length = WTAP_MAX_PACKET_SIZE;
2830 /* If we don't have an application name add Tshark */
2831 if (shb_hdr->shb_user_appl == NULL) {
2832 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2833 shb_hdr->shb_user_appl = appname;
2836 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2837 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2843 /* We couldn't set up to write to the capture file. */
2846 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2847 cmdarg_err("Capture files can't be written in that format.");
2850 case WTAP_ERR_UNSUPPORTED_ENCAP:
2851 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2852 cmdarg_err("The capture file being read can't be written as a "
2853 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2856 case WTAP_ERR_CANT_OPEN:
2857 cmdarg_err("The %s couldn't be created for some "
2858 "unknown reason.", save_file_string);
2861 case WTAP_ERR_SHORT_WRITE:
2862 cmdarg_err("A full header couldn't be written to the %s.",
2867 cmdarg_err("The %s could not be created: %s.", save_file_string,
2868 wtap_strerror(err));
2874 if (print_packet_info) {
2875 if (!write_preamble(cf)) {
2877 show_print_file_io_error(err);
2884 if (pdh && out_file_name_res) {
2885 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2886 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2887 wtap_file_type_short_string(out_file_type));
2891 /* Do we have any tap listeners with filters? */
2892 filtering_tap_listeners = have_filtering_tap_listeners();
2894 /* Get the union of the flags for all tap listeners. */
2895 tap_flags = union_of_tap_listener_flags();
2897 if (perform_two_pass_analysis) {
2899 int old_max_packet_count = max_packet_count;
2901 /* Allocate a frame_data_sequence for all the frames. */
2902 cf->frames = new_frame_data_sequence();
2904 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2905 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2906 wtap_buf_ptr(cf->wth))) {
2907 /* Stop reading if we have the maximum number of packets;
2908 * When the -c option has not been used, max_packet_count
2909 * starts at 0, which practically means, never stop reading.
2910 * (unless we roll over max_packet_count ?)
2912 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2913 err = 0; /* This is not an error */
2919 /* Close the sequential I/O side, to free up memory it requires. */
2920 wtap_sequential_close(cf->wth);
2922 /* Allow the protocol dissectors to free up memory that they
2923 * don't need after the sequential run-through of the packets. */
2924 postseq_cleanup_all_protocols();
2926 max_packet_count = old_max_packet_count;
2928 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2929 fdata = frame_data_sequence_find(cf->frames, framenum);
2930 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2931 cf->pd, fdata->cap_len, &err, &err_info)) {
2932 if (process_packet_second_pass(cf, fdata,
2934 filtering_tap_listeners, tap_flags)) {
2935 /* Either there's no read filtering or this packet passed the
2936 filter, so, if we're writing to a capture file, write
2939 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2940 /* Error writing to a capture file */
2943 case WTAP_ERR_UNSUPPORTED_ENCAP:
2945 * This is a problem with the particular frame we're writing;
2946 * note that, and give the frame number.
2948 * XXX - framenum is not necessarily the frame number in
2949 * the input file if there was a read filter.
2952 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2953 framenum, cf->filename,
2954 wtap_file_type_short_string(out_file_type));
2958 show_capture_file_io_error(save_file, err, FALSE);
2961 wtap_dump_close(pdh, &err);
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 */
2981 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2984 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2985 wtap_buf_ptr(cf->wth),
2986 filtering_tap_listeners, tap_flags)) {
2987 /* Either there's no read filtering or this packet passed the
2988 filter, so, if we're writing to a capture file, write
2991 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2992 /* Error writing to a capture file */
2995 case WTAP_ERR_UNSUPPORTED_ENCAP:
2997 * This is a problem with the particular frame we're writing;
2998 * note that, and give the frame number.
3001 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3002 framenum, cf->filename,
3003 wtap_file_type_short_string(out_file_type));
3007 show_capture_file_io_error(save_file, err, FALSE);
3010 wtap_dump_close(pdh, &err);
3015 /* Stop reading if we have the maximum number of packets;
3016 * When the -c option has not been used, max_packet_count
3017 * starts at 0, which practically means, never stop reading.
3018 * (unless we roll over max_packet_count ?)
3020 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3021 err = 0; /* This is not an error */
3030 * Print a message noting that the read failed somewhere along the line.
3032 * If we're printing packet data, and the standard output and error are
3033 * going to the same place, flush the standard output, so everything
3034 * buffered up is written, and then print a newline to the standard error
3035 * before printing the error message, to separate it from the packet
3036 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3037 * the _fstat() documentation at Microsoft doesn't indicate whether
3038 * st_ino is even supported.)
3041 if (print_packet_info) {
3042 struct stat stat_stdout, stat_stderr;
3044 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3045 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3046 stat_stdout.st_ino == stat_stderr.st_ino) {
3048 fprintf(stderr, "\n");
3055 case WTAP_ERR_UNSUPPORTED:
3056 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3057 cf->filename, err_info);
3061 case WTAP_ERR_UNSUPPORTED_ENCAP:
3062 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3063 cf->filename, err_info);
3067 case WTAP_ERR_CANT_READ:
3068 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3072 case WTAP_ERR_SHORT_READ:
3073 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3077 case WTAP_ERR_BAD_FILE:
3078 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3079 cf->filename, err_info);
3083 case WTAP_ERR_DECOMPRESS:
3084 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3085 "(%s)", cf->filename, err_info);
3089 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3090 cf->filename, wtap_strerror(err));
3093 if (save_file != NULL) {
3094 /* Now close the capture file. */
3095 if (!wtap_dump_close(pdh, &err))
3096 show_capture_file_io_error(save_file, err, TRUE);
3099 if (save_file != NULL) {
3100 /* Now close the capture file. */
3101 if (!wtap_dump_close(pdh, &err))
3102 show_capture_file_io_error(save_file, err, TRUE);
3104 if (print_packet_info) {
3105 if (!write_finale()) {
3107 show_print_file_io_error(err);
3114 wtap_close(cf->wth);
3117 g_free(save_file_string);
3124 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3126 gboolean filtering_tap_listeners, guint tap_flags)
3129 gboolean create_proto_tree;
3134 /* Count this packet. */
3137 /* If we're not running a display filter and we're not printing any
3138 packet information, we don't need to do a dissection. This means
3139 that all packets can be marked as 'passed'. */
3142 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3144 /* If we're going to print packet information, or we're going to
3145 run a read filter, or we're going to process taps, set up to
3146 do a dissection and do so. */
3147 if (do_dissection) {
3148 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3149 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3150 /* Grab any resolved addresses */
3151 host_name_lookup_process();
3153 if (cf->rfcode || print_details || filtering_tap_listeners ||
3154 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3155 create_proto_tree = TRUE;
3157 create_proto_tree = FALSE;
3159 /* The protocol tree will be "visible", i.e., printed, only if we're
3160 printing packet details, which is true if we're printing stuff
3161 ("print_packet_info" is true) and we're in verbose mode
3162 ("packet_details" is true). */
3163 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3165 /* If we're running a read filter, prime the epan_dissect_t with that
3168 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3170 col_custom_prime_edt(&edt, &cf->cinfo);
3172 /* We only need the columns if either
3173 1) some tap needs the columns
3175 2) we're printing packet info but we're *not* verbose; in verbose
3176 mode, we print the protocol tree, not the protocol summary.
3178 3) there is a column mapped as an individual field */
3179 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3184 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3185 &first_ts, prev_dis, prev_cap);
3187 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3189 /* Run the read filter if we have one. */
3191 passed = dfilter_apply_edt(cf->rfcode, &edt);
3195 frame_data_set_after_dissect(&fdata, &cum_bytes);
3196 prev_dis_frame = fdata;
3197 prev_dis = &prev_dis_frame;
3199 /* Process this packet. */
3200 if (print_packet_info) {
3201 /* We're printing packet information; print the information for
3204 print_packet(cf, &edt);
3206 print_packet(cf, NULL);
3208 /* The ANSI C standard does not appear to *require* that a line-buffered
3209 stream be flushed to the host environment whenever a newline is
3210 written, it just says that, on such a stream, characters "are
3211 intended to be transmitted to or from the host environment as a
3212 block when a new-line character is encountered".
3214 The Visual C++ 6.0 C implementation doesn't do what is intended;
3215 even if you set a stream to be line-buffered, it still doesn't
3216 flush the buffer at the end of every line.
3218 So, if the "-l" flag was specified, we flush the standard output
3219 at the end of a packet. This will do the right thing if we're
3220 printing packet summary lines, and, as we print the entire protocol
3221 tree for a single packet without waiting for anything to happen,
3222 it should be as good as line-buffered mode if we're printing
3223 protocol trees. (The whole reason for the "-l" flag in either
3224 tcpdump or TShark is to allow the output of a live capture to
3225 be piped to a program or script and to have that script see the
3226 information for the packet as soon as it's printed, rather than
3227 having to wait until a standard I/O buffer fills up. */
3231 if (ferror(stdout)) {
3232 show_print_file_io_error(errno);
3238 prev_cap_frame = fdata;
3239 prev_cap = &prev_cap_frame;
3241 if (do_dissection) {
3242 epan_dissect_cleanup(&edt);
3243 frame_data_cleanup(&fdata);
3249 write_preamble(capture_file *cf)
3251 switch (output_action) {
3254 return print_preamble(print_stream, cf ? cf->filename : NULL);
3258 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3260 write_psml_preamble(stdout);
3261 return !ferror(stdout);
3264 write_fields_preamble(output_fields, stdout);
3265 return !ferror(stdout);
3268 g_assert_not_reached();
3274 get_line_buf(size_t len)
3276 static char *line_bufp = NULL;
3277 static size_t line_buf_len = 256;
3278 size_t new_line_buf_len;
3280 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3281 new_line_buf_len *= 2)
3283 if (line_bufp == NULL) {
3284 line_buf_len = new_line_buf_len;
3285 line_bufp = g_malloc(line_buf_len + 1);
3287 if (new_line_buf_len > line_buf_len) {
3288 line_buf_len = new_line_buf_len;
3289 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3296 print_columns(capture_file *cf)
3303 line_bufp = get_line_buf(256);
3306 for (i = 0; i < cf->cinfo.num_cols; i++) {
3307 /* Skip columns not marked as visible. */
3308 if (!get_column_visible(i))
3310 switch (cf->cinfo.col_fmt[i]) {
3314 * Don't print this if we're doing a live capture from a network
3315 * interface - if we're doing a live capture, you won't be
3316 * able to look at the capture in the future (it's not being
3317 * saved anywhere), so the frame numbers are unlikely to be
3320 * (XXX - it might be nice to be able to save and print at
3321 * the same time, sort of like an "Update list of packets
3322 * in real time" capture in Wireshark.)
3324 if (global_capture_opts.ifaces->len > 0)
3327 column_len = strlen(cf->cinfo.col_data[i]);
3330 line_bufp = get_line_buf(buf_offset + column_len);
3331 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3337 case COL_ABS_DATE_TIME:
3339 case COL_UTC_DATE_TIME: /* XXX - wider */
3340 column_len = strlen(cf->cinfo.col_data[i]);
3341 if (column_len < 10)
3343 line_bufp = get_line_buf(buf_offset + column_len);
3344 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3350 case COL_DEF_DL_SRC:
3351 case COL_RES_DL_SRC:
3352 case COL_UNRES_DL_SRC:
3353 case COL_DEF_NET_SRC:
3354 case COL_RES_NET_SRC:
3355 case COL_UNRES_NET_SRC:
3356 column_len = strlen(cf->cinfo.col_data[i]);
3357 if (column_len < 12)
3359 line_bufp = get_line_buf(buf_offset + column_len);
3360 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3366 case COL_DEF_DL_DST:
3367 case COL_RES_DL_DST:
3368 case COL_UNRES_DL_DST:
3369 case COL_DEF_NET_DST:
3370 case COL_RES_NET_DST:
3371 case COL_UNRES_NET_DST:
3372 column_len = strlen(cf->cinfo.col_data[i]);
3373 if (column_len < 12)
3375 line_bufp = get_line_buf(buf_offset + column_len);
3376 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3380 column_len = strlen(cf->cinfo.col_data[i]);
3381 line_bufp = get_line_buf(buf_offset + column_len);
3382 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3385 buf_offset += column_len;
3386 if (i != cf->cinfo.num_cols - 1) {
3388 * This isn't the last column, so we need to print a
3389 * separator between this column and the next.
3391 * If we printed a network source and are printing a
3392 * network destination of the same type next, separate
3393 * them with " -> "; if we printed a network destination
3394 * and are printing a network source of the same type
3395 * next, separate them with " <- "; otherwise separate them
3398 * We add enough space to the buffer for " <- " or " -> ",
3399 * even if we're only adding " ".
3401 line_bufp = get_line_buf(buf_offset + 4);
3402 switch (cf->cinfo.col_fmt[i]) {
3407 switch (cf->cinfo.col_fmt[i + 1]) {
3412 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3417 g_strlcat(line_bufp + buf_offset, " ", 5);
3423 case COL_DEF_DL_SRC:
3424 case COL_RES_DL_SRC:
3425 case COL_UNRES_DL_SRC:
3426 switch (cf->cinfo.col_fmt[i + 1]) {
3428 case COL_DEF_DL_DST:
3429 case COL_RES_DL_DST:
3430 case COL_UNRES_DL_DST:
3431 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3436 g_strlcat(line_bufp + buf_offset, " ", 5);
3442 case COL_DEF_NET_SRC:
3443 case COL_RES_NET_SRC:
3444 case COL_UNRES_NET_SRC:
3445 switch (cf->cinfo.col_fmt[i + 1]) {
3447 case COL_DEF_NET_DST:
3448 case COL_RES_NET_DST:
3449 case COL_UNRES_NET_DST:
3450 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3455 g_strlcat(line_bufp + buf_offset, " ", 5);
3464 switch (cf->cinfo.col_fmt[i + 1]) {
3469 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3474 g_strlcat(line_bufp + buf_offset, " ", 5);
3480 case COL_DEF_DL_DST:
3481 case COL_RES_DL_DST:
3482 case COL_UNRES_DL_DST:
3483 switch (cf->cinfo.col_fmt[i + 1]) {
3485 case COL_DEF_DL_SRC:
3486 case COL_RES_DL_SRC:
3487 case COL_UNRES_DL_SRC:
3488 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3493 g_strlcat(line_bufp + buf_offset, " ", 5);
3499 case COL_DEF_NET_DST:
3500 case COL_RES_NET_DST:
3501 case COL_UNRES_NET_DST:
3502 switch (cf->cinfo.col_fmt[i + 1]) {
3504 case COL_DEF_NET_SRC:
3505 case COL_RES_NET_SRC:
3506 case COL_UNRES_NET_SRC:
3507 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3512 g_strlcat(line_bufp + buf_offset, " ", 5);
3519 g_strlcat(line_bufp + buf_offset, " ", 5);
3525 return print_line(print_stream, 0, line_bufp);
3529 print_packet(capture_file *cf, epan_dissect_t *edt)
3531 print_args_t print_args;
3533 if (print_summary || output_fields_has_cols(output_fields)) {
3534 /* Just fill in the columns. */
3535 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3537 if (print_summary) {
3538 /* Now print them. */
3539 switch (output_action) {
3542 if (!print_columns(cf))
3547 proto_tree_write_psml(edt, stdout);
3548 return !ferror(stdout);
3549 case WRITE_FIELDS: /*No non-verbose "fields" format */
3550 g_assert_not_reached();
3555 if (print_details) {
3556 /* Print the information in the protocol tree. */
3557 switch (output_action) {
3560 /* Only initialize the fields that are actually used in proto_tree_print.
3561 * This is particularly important for .range, as that's heap memory which
3562 * we would otherwise have to g_free().
3563 print_args.to_file = TRUE;
3564 print_args.format = print_format;
3565 print_args.print_summary = print_summary;
3566 print_args.print_formfeed = FALSE;
3567 packet_range_init(&print_args.range, &cfile);
3569 print_args.print_hex = print_hex;
3570 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3572 if (!proto_tree_print(&print_args, edt, print_stream))
3575 if (!print_line(print_stream, 0, separator))
3581 proto_tree_write_pdml(edt, stdout);
3583 return !ferror(stdout);
3585 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3587 return !ferror(stdout);
3591 if (print_summary || print_details) {
3592 if (!print_line(print_stream, 0, ""))
3595 if (!print_hex_data(print_stream, edt))
3597 if (!print_line(print_stream, 0, separator))
3606 switch (output_action) {
3609 return print_finale(print_stream);
3613 write_pdml_finale(stdout);
3615 write_psml_finale(stdout);
3616 return !ferror(stdout);
3619 write_fields_finale(output_fields, stdout);
3620 return !ferror(stdout);
3623 g_assert_not_reached();
3629 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3633 char err_msg[2048+1];
3635 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3639 /* The open succeeded. Fill in the information for this file. */
3641 /* Cleanup all data structures used for dissection. */
3642 cleanup_dissection();
3643 /* Initialize all data structures used for dissection. */
3647 cf->f_datalen = 0; /* not used, but set it anyway */
3649 /* Set the file name because we need it to set the follow stream filter.
3650 XXX - is that still true? We need it for other reasons, though,
3652 cf->filename = g_strdup(fname);
3654 /* Indicate whether it's a permanent or temporary file. */
3655 cf->is_tempfile = is_tempfile;
3657 /* No user changes yet. */
3658 cf->unsaved_changes = FALSE;
3660 cf->cd_t = wtap_file_type(cf->wth);
3662 cf->drops_known = FALSE;
3664 cf->snap = wtap_snapshot_length(cf->wth);
3665 if (cf->snap == 0) {
3666 /* Snapshot length not known. */
3667 cf->has_snap = FALSE;
3668 cf->snap = WTAP_MAX_PACKET_SIZE;
3670 cf->has_snap = TRUE;
3671 nstime_set_zero(&cf->elapsed_time);
3672 nstime_set_unset(&first_ts);
3676 cf->state = FILE_READ_IN_PROGRESS;
3678 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3679 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3684 g_snprintf(err_msg, sizeof err_msg,
3685 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3686 cmdarg_err("%s", err_msg);
3691 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3693 char *save_file_string;
3695 save_file_string = output_file_description(fname);
3700 cmdarg_err("Not all the packets could be written to the %s because there is "
3701 "no space left on the file system.",
3707 cmdarg_err("Not all the packets could be written to the %s because you are "
3708 "too close to, or over your disk quota.",
3713 case WTAP_ERR_CANT_CLOSE:
3714 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3718 case WTAP_ERR_SHORT_WRITE:
3719 cmdarg_err("Not all the packets could be written to the %s.",
3725 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3726 wtap_strerror(err));
3728 cmdarg_err("An error occurred while writing to the %s: %s.",
3729 save_file_string, wtap_strerror(err));
3733 g_free(save_file_string);
3737 show_print_file_io_error(int err)
3742 cmdarg_err("Not all the packets could be printed because there is "
3743 "no space left on the file system.");
3748 cmdarg_err("Not all the packets could be printed because you are "
3749 "too close to, or over your disk quota.");
3754 cmdarg_err("An error occurred while printing packets: %s.",
3761 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3765 static char errmsg_errno[1024+1];
3768 /* Wiretap error. */
3771 case WTAP_ERR_NOT_REGULAR_FILE:
3772 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3775 case WTAP_ERR_RANDOM_OPEN_PIPE:
3776 /* Seen only when opening a capture file for reading. */
3777 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3780 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3781 /* Seen only when opening a capture file for reading. */
3782 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3785 case WTAP_ERR_UNSUPPORTED:
3786 /* Seen only when opening a capture file for reading. */
3787 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3788 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3791 errmsg = errmsg_errno;
3794 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3795 /* Seen only when opening a capture file for writing. */
3796 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3797 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3798 "written to a pipe.", wtap_file_type_short_string(file_type));
3799 errmsg = errmsg_errno;
3802 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3803 /* Seen only when opening a capture file for writing. */
3804 errmsg = "TShark doesn't support writing capture files in that format.";
3807 case WTAP_ERR_UNSUPPORTED_ENCAP:
3809 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3810 "TShark can't save this capture as a \"%s\" file.",
3811 wtap_file_type_short_string(file_type));
3813 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3814 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3818 errmsg = errmsg_errno;
3821 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3823 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3824 "TShark can't save this capture as a \"%s\" file.",
3825 wtap_file_type_short_string(file_type));
3826 errmsg = errmsg_errno;
3828 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3831 case WTAP_ERR_BAD_FILE:
3832 /* Seen only when opening a capture file for reading. */
3833 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3834 "The file \"%%s\" appears to be damaged or corrupt.\n"
3837 errmsg = errmsg_errno;
3840 case WTAP_ERR_CANT_OPEN:
3842 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3844 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3847 case WTAP_ERR_SHORT_READ:
3848 errmsg = "The file \"%s\" appears to have been cut short"
3849 " in the middle of a packet or other data.";
3852 case WTAP_ERR_SHORT_WRITE:
3853 errmsg = "A full header couldn't be written to the file \"%s\".";
3856 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3857 errmsg = "This file type cannot be written as a compressed file.";
3860 case WTAP_ERR_DECOMPRESS:
3861 /* Seen only when opening a capture file for reading. */
3862 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3863 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3866 errmsg = errmsg_errno;
3870 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3871 "The file \"%%s\" could not be %s: %s.",
3872 for_writing ? "created" : "opened",
3873 wtap_strerror(err));
3874 errmsg = errmsg_errno;
3878 errmsg = file_open_error_message(err, for_writing);
3883 * Open/create errors are reported with an console message in TShark.
3886 open_failure_message(const char *filename, int err, gboolean for_writing)
3888 fprintf(stderr, "tshark: ");
3889 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3890 fprintf(stderr, "\n");
3895 * General errors are reported with an console message in TShark.
3898 failure_message(const char *msg_format, va_list ap)
3900 fprintf(stderr, "tshark: ");
3901 vfprintf(stderr, msg_format, ap);
3902 fprintf(stderr, "\n");
3906 * Read errors are reported with an console message in TShark.
3909 read_failure_message(const char *filename, int err)
3911 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3912 filename, g_strerror(err));
3916 * Write errors are reported with an console message in TShark.
3919 write_failure_message(const char *filename, int err)
3921 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3922 filename, g_strerror(err));
3926 * Print to the standard error. This is a command-line tool, so there's
3927 * no need to pop up a console.
3930 vfprintf_stderr(const char *fmt, va_list ap)
3932 vfprintf(stderr, fmt, ap);
3936 fprintf_stderr(const char *fmt, ...)
3941 vfprintf_stderr(fmt, ap);
3946 * Report an error in command-line arguments.
3949 cmdarg_err(const char *fmt, ...)
3954 failure_message(fmt, ap);
3959 * Report additional information for an error in command-line arguments.
3962 cmdarg_err_cont(const char *fmt, ...)
3967 vfprintf(stderr, fmt, ap);
3968 fprintf(stderr, "\n");
3974 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3979 * indent-tabs-mode: nil
3982 * vi: set shiftwidth=2 tabstop=8 expandtab:
3983 * :indentSize=2:tabSize=8:noTabs=true: