3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
52 #ifdef HAVE_SYS_STAT_H
53 # include <sys/stat.h>
57 #include "wsutil/wsgetopt.h"
61 #include <epan/epan-int.h>
62 #include <epan/epan.h>
63 #include <epan/filesystem.h>
64 #include <wsutil/crash_info.h>
65 #include <wsutil/privileges.h>
66 #include <wsutil/file_util.h>
69 #include <epan/timestamp.h>
70 #include <epan/packet.h>
72 #include "frame_tvbuff.h"
73 #include <epan/disabled_protos.h>
74 #include <epan/prefs.h>
75 #include <epan/column.h>
76 #include <epan/print.h>
77 #include <epan/addr_resolv.h>
79 #include "clopts_common.h"
80 #include "cmdarg_err.h"
81 #include "version_info.h"
82 #include <epan/plugins.h>
84 #include <epan/epan_dissect.h>
86 #include <epan/stat_cmd_args.h>
87 #include <epan/timestamp.h>
88 #include <epan/ex-opt.h>
90 #include "capture_opts.h"
93 #include "capture_ui_utils.h"
94 #include "capture_ifinfo.h"
95 #include "capture-pcap-util.h"
97 #include "capture-wpcap.h"
98 #include <wsutil/unicode-utils.h>
100 #include "capture_session.h"
101 #include "capture_sync.h"
102 #include "capture_opts.h"
103 #endif /* HAVE_LIBPCAP */
105 #include <epan/funnel.h>
108 * This is the template for the decode as option; it is shared between the
109 * various functions that output the usage for this parameter.
111 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
113 static guint32 cum_bytes;
114 static const frame_data *ref;
115 static frame_data ref_frame;
116 static frame_data *prev_dis;
117 static frame_data prev_dis_frame;
118 static frame_data *prev_cap;
119 static frame_data prev_cap_frame;
121 static const char* prev_display_dissector_name = NULL;
123 static gboolean perform_two_pass_analysis;
126 * The way the packet decode is to be written.
129 WRITE_TEXT, /* summary or detail text */
130 WRITE_XML, /* PDML or PSML */
131 WRITE_FIELDS /* User defined list of fields */
132 /* Add CSV and the like here */
135 static output_action_e output_action;
136 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
137 static gboolean print_packet_info; /* TRUE if we're to print packet information */
138 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
139 static gboolean print_details; /* TRUE if we're to print packet details information */
140 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
141 static gboolean line_buffered;
142 static gboolean really_quiet = FALSE;
144 static print_format_e print_format = PR_FMT_TEXT;
145 static print_stream_t *print_stream;
147 static output_fields_t* output_fields = NULL;
149 /* The line separator used between packets, changeable via the -S option */
150 static const char *separator = "";
154 * TRUE if we're to print packet counts to keep track of captured packets.
156 static gboolean print_packet_counts = TRUE;
158 static capture_options global_capture_opts;
159 static capture_session global_capture_session;
162 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
163 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
166 static gboolean capture(void);
167 static void report_counts(void);
169 static BOOL WINAPI capture_cleanup(DWORD);
171 static void capture_cleanup(int);
173 static void report_counts_siginfo(int);
176 #endif /* HAVE_LIBPCAP */
178 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
179 static gboolean process_packet(capture_file *cf, gint64 offset,
180 struct wtap_pkthdr *whdr, const guchar *pd,
181 gboolean filtering_tap_listeners, guint tap_flags);
182 static void show_capture_file_io_error(const char *, int, gboolean);
183 static void show_print_file_io_error(int err);
184 static gboolean write_preamble(capture_file *cf);
185 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
186 static gboolean write_finale(void);
187 static const char *cf_open_error_message(int err, gchar *err_info,
188 gboolean for_writing, int file_type);
190 static void open_failure_message(const char *filename, int err,
191 gboolean for_writing);
192 static void failure_message(const char *msg_format, va_list ap);
193 static void read_failure_message(const char *filename, int err);
194 static void write_failure_message(const char *filename, int err);
199 const char *sstr; /* The short string */
200 const char *lstr; /* The long string */
204 string_compare(gconstpointer a, gconstpointer b)
206 return strcmp(((const struct string_elem *)a)->sstr,
207 ((const struct string_elem *)b)->sstr);
211 string_elem_print(gpointer data, gpointer not_used _U_)
213 fprintf(stderr, " %s - %s\n",
214 ((struct string_elem *)data)->sstr,
215 ((struct string_elem *)data)->lstr);
219 list_capture_types(void) {
221 struct string_elem *captypes;
224 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
226 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
227 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
228 if (wtap_dump_can_open(i)) {
229 captypes[i].sstr = wtap_file_type_short_string(i);
230 captypes[i].lstr = wtap_file_type_string(i);
231 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
234 g_slist_foreach(list, string_elem_print, NULL);
240 print_usage(gboolean print_ver)
247 "TShark " VERSION "%s\n"
248 "Dump and analyze network traffic.\n"
249 "See http://www.wireshark.org for more information.\n"
252 wireshark_svnversion, get_copyright_info());
256 fprintf(output, "\n");
257 fprintf(output, "Usage: tshark [options] ...\n");
258 fprintf(output, "\n");
261 fprintf(output, "Capture interface:\n");
262 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
263 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
264 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
265 fprintf(output, " -p don't capture in promiscuous mode\n");
266 #ifdef HAVE_PCAP_CREATE
267 fprintf(output, " -I capture in monitor mode, if available\n");
269 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
270 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
272 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
273 fprintf(output, " -D print list of interfaces and exit\n");
274 fprintf(output, " -L print list of link-layer types of iface and exit\n");
275 fprintf(output, "\n");
276 fprintf(output, "Capture stop conditions:\n");
277 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
278 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
279 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
280 fprintf(output, " files:NUM - stop after NUM files\n");
281 /*fprintf(output, "\n");*/
282 fprintf(output, "Capture output:\n");
283 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
284 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
285 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
286 #endif /* HAVE_LIBPCAP */
287 #ifdef HAVE_PCAP_REMOTE
288 fprintf(output, "RPCAP options:\n");
289 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
291 /*fprintf(output, "\n");*/
292 fprintf(output, "Input file:\n");
293 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
295 fprintf(output, "\n");
296 fprintf(output, "Processing:\n");
297 fprintf(output, " -2 perform a two-pass analysis\n");
298 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
299 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
300 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
301 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
302 fprintf(output, " -d %s ...\n", decode_as_arg_template);
303 fprintf(output, " \"Decode As\", see the man page for details\n");
304 fprintf(output, " Example: tcp.port==8888,http\n");
305 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
306 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
308 /*fprintf(output, "\n");*/
309 fprintf(output, "Output:\n");
310 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
311 fprintf(output, " (or to the standard output for \"-\")\n");
312 fprintf(output, " -C <config profile> start with specified configuration profile\n");
313 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
314 fprintf(output, " an empty \"-F\" option will list the file types\n");
315 fprintf(output, " -V add output of packet tree (Packet Details)\n");
316 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
317 fprintf(output, " separated\n");
318 fprintf(output, " -P print packet summary even when writing to a file\n");
319 fprintf(output, " -S <separator> the line separator to print between packets\n");
320 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
321 fprintf(output, " -T pdml|ps|psml|text|fields\n");
322 fprintf(output, " format of text output (def: text)\n");
323 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
324 fprintf(output, " this option can be repeated to print multiple fields\n");
325 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
326 fprintf(output, " header=y|n switch headers on and off\n");
327 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
328 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
329 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
330 fprintf(output, " aggregator\n");
331 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
332 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
333 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
334 fprintf(output, " -l flush standard output after each packet\n");
335 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
336 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
337 fprintf(output, " -g enable group read access on the output file(s)\n");
338 fprintf(output, " -W n Save extra information in the file, if supported.\n");
339 fprintf(output, " n = write network address resolution information\n");
340 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
341 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
342 fprintf(output, " --capture-comment <comment>\n");
343 fprintf(output, " add a capture comment to the newly created\n");
344 fprintf(output, " output file (only for pcapng)\n");
346 fprintf(output, "\n");
347 fprintf(output, "Miscellaneous:\n");
348 fprintf(output, " -h display this help and exit\n");
349 fprintf(output, " -v display version info and exit\n");
350 fprintf(output, " -o <name>:<value> ... override preference setting\n");
351 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
352 fprintf(output, " -G [report] dump one of several available reports and exit\n");
353 fprintf(output, " default report=\"fields\"\n");
354 fprintf(output, " use \"-G ?\" for more help\n");
358 glossary_option_help(void)
364 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
366 fprintf(output, "\n");
367 fprintf(output, "Usage: tshark -G [report]\n");
368 fprintf(output, "\n");
369 fprintf(output, "Glossary table reports:\n");
370 fprintf(output, " -G fields dump fields glossary and exit\n");
371 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
372 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
373 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
374 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
375 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
376 fprintf(output, "\n");
377 fprintf(output, "Preference reports:\n");
378 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
379 fprintf(output, " -G currentprefs dump current preferences and exit\n");
380 fprintf(output, "\n");
384 * For a dissector table, print on the stream described by output,
385 * its short name (which is what's used in the "-d" option) and its
389 display_dissector_table_names(const char *table_name, const char *ui_name,
392 if ((prev_display_dissector_name == NULL) ||
393 (strcmp(prev_display_dissector_name, table_name) != 0)) {
394 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
395 prev_display_dissector_name = table_name;
400 * For a dissector handle, print on the stream described by output,
401 * the filter name (which is what's used in the "-d" option) and the full
402 * name for the protocol that corresponds to this handle.
405 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
408 const gchar *proto_filter_name;
409 const gchar *proto_ui_name;
411 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
413 if (proto_id != -1) {
414 proto_filter_name = proto_get_protocol_filter_name(proto_id);
415 proto_ui_name = proto_get_protocol_name(proto_id);
416 g_assert(proto_filter_name != NULL);
417 g_assert(proto_ui_name != NULL);
419 if ((prev_display_dissector_name == NULL) ||
420 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
421 fprintf((FILE *)output, "\t%s (%s)\n",
424 prev_display_dissector_name = proto_filter_name;
430 * The protocol_name_search structure is used by find_protocol_name_func()
431 * to pass parameters and store results
433 struct protocol_name_search{
434 gchar *searched_name; /* Protocol filter name we are looking for */
435 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
436 guint nb_match; /* How many dissectors matched searched_name */
438 typedef struct protocol_name_search *protocol_name_search_t;
441 * This function parses all dissectors associated with a table to find the
442 * one whose protocol has the specified filter name. It is called
443 * as a reference function in a call to dissector_table_foreach_handle.
444 * The name we are looking for, as well as the results, are stored in the
445 * protocol_name_search struct pointed to by user_data.
446 * If called using dissector_table_foreach_handle, we actually parse the
447 * whole list of dissectors.
450 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
454 const gchar *protocol_filter_name;
455 protocol_name_search_t search_info;
459 search_info = (protocol_name_search_t)user_data;
461 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
462 if (proto_id != -1) {
463 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
464 g_assert(protocol_filter_name != NULL);
465 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
467 if (search_info->nb_match == 0) {
468 /* Record this handle only if this is the first match */
469 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
471 search_info->nb_match++;
477 * Allow dissector key names to be sorted alphabetically
481 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
483 return strcmp((const char*)dissector_a, (const char*)dissector_b);
487 * Print all layer type names supported.
488 * We send the output to the stream described by the handle output.
492 fprint_all_layer_types(FILE *output)
495 prev_display_dissector_name = NULL;
496 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
500 * Print all protocol names supported for a specific layer type.
501 * table_name contains the layer type name in which the search is performed.
502 * We send the output to the stream described by the handle output.
506 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
509 prev_display_dissector_name = NULL;
510 dissector_table_foreach_handle(table_name,
511 display_dissector_names,
516 * The function below parses the command-line parameters for the decode as
517 * feature (a string pointer by cl_param).
518 * It checks the format of the command-line, searches for a matching table
519 * and dissector. If a table/dissector match is not found, we display a
520 * summary of the available tables/dissectors (on stderr) and return FALSE.
521 * If everything is fine, we get the "Decode as" preference activated,
522 * then we return TRUE.
525 add_decode_as(const gchar *cl_param)
528 guint32 selector, selector2;
529 gchar *decoded_param;
530 gchar *remaining_param;
532 gchar *dissector_str;
533 dissector_handle_t dissector_matching;
534 dissector_table_t table_matching;
535 ftenum_t dissector_table_selector_type;
536 struct protocol_name_search user_protocol_name;
540 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
543 decoded_param = g_strdup(cl_param);
544 g_assert(decoded_param);
547 /* The lines below will parse this string (modifying it) to extract all
548 necessary information. Note that decoded_param is still needed since
549 strings are not copied - we just save pointers. */
551 /* This section extracts a layer type (table_name) from decoded_param */
552 table_name = decoded_param; /* Layer type string starts from beginning */
554 remaining_param = strchr(table_name, '=');
555 if (remaining_param == NULL) {
556 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
557 /* If the argument does not follow the template, carry on anyway to check
558 if the table name is at least correct. If remaining_param is NULL,
559 we'll exit anyway further down */
562 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
565 /* Remove leading and trailing spaces from the table name */
566 while ( table_name[0] == ' ' )
568 while ( table_name[strlen(table_name) - 1] == ' ' )
569 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
571 /* The following part searches a table matching with the layer type specified */
572 table_matching = NULL;
574 /* Look for the requested table */
575 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
576 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
579 table_matching = find_dissector_table(table_name);
580 if (!table_matching) {
581 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
585 if (!table_matching) {
586 /* Display a list of supported layer types to help the user, if the
587 specified layer type was not found */
588 cmdarg_err("Valid layer types are:");
589 fprint_all_layer_types(stderr);
591 if (remaining_param == NULL || !table_matching) {
592 /* Exit if the layer type was not found, or if no '=' separator was found
594 g_free(decoded_param);
598 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
599 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
602 remaining_param++; /* Move to the second '=' */
603 *remaining_param = '\0'; /* Remove the second '=' */
605 remaining_param++; /* Position after the layer type string */
607 /* This section extracts a selector value (selector_str) from decoded_param */
609 selector_str = remaining_param; /* Next part starts with the selector number */
611 remaining_param = strchr(selector_str, ',');
612 if (remaining_param == NULL) {
613 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
614 /* If the argument does not follow the template, carry on anyway to check
615 if the selector value is at least correct. If remaining_param is NULL,
616 we'll exit anyway further down */
619 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
622 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
624 switch (dissector_table_selector_type) {
630 /* The selector for this table is an unsigned number. Parse it as such.
631 There's no need to remove leading and trailing spaces from the
632 selector number string, because sscanf will do that for us. */
633 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
638 if (op != ':' && op != '-') {
639 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
640 g_free(decoded_param);
644 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
645 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
646 g_free(decoded_param);
650 else if (selector2 < selector) {
651 /* We could swap them for the user, but maybe it's better to call
652 * this out as an error in case it's not what was intended? */
653 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
654 g_free(decoded_param);
659 cmdarg_err("Invalid selector number \"%s\"", selector_str);
660 g_free(decoded_param);
667 /* The selector for this table is a string. */
671 /* There are currently no dissector tables with any types other
672 than the ones listed above. */
673 g_assert_not_reached();
676 if (remaining_param == NULL) {
677 /* Exit if no ',' separator was found (see above) */
678 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
679 fprint_all_protocols_for_layer_types(stderr, table_name);
680 g_free(decoded_param);
684 remaining_param++; /* Position after the selector number string */
686 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
688 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
690 /* Remove leading and trailing spaces from the dissector name */
691 while ( dissector_str[0] == ' ' )
693 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
694 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
696 dissector_matching = NULL;
698 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
699 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 */
700 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
703 user_protocol_name.nb_match = 0;
704 user_protocol_name.searched_name = dissector_str;
705 user_protocol_name.matched_handle = NULL;
707 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 */
709 if (user_protocol_name.nb_match != 0) {
710 dissector_matching = user_protocol_name.matched_handle;
711 if (user_protocol_name.nb_match > 1) {
712 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
716 /* OK, check whether the problem is that there isn't any such
717 protocol, or that there is but it's not specified as a protocol
718 that's valid for that dissector table.
719 Note, we don't exit here, but dissector_matching will remain NULL,
721 if (proto_get_id_by_filter_name(dissector_str) == -1) {
722 /* No such protocol */
723 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
725 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
726 dissector_str, table_name);
731 if (!dissector_matching) {
732 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
733 fprint_all_protocols_for_layer_types(stderr, table_name);
734 g_free(decoded_param);
738 /* This is the end of the code that parses the command-line options.
739 All information is now stored in the variables:
743 The above variables that are strings are still pointing to areas within
744 decoded_parm. decoded_parm thus still needs to be kept allocated in
745 until we stop needing these variables
746 decoded_param will be deallocated at each exit point of this function */
749 /* We now have a pointer to the handle for the requested dissector
750 (requested protocol) inside the variable dissector_matching */
751 switch (dissector_table_selector_type) {
757 /* The selector for this table is an unsigned number. */
759 dissector_change_uint(table_name, selector, dissector_matching);
760 } else if (op == ':') {
761 for (i = selector; i < (guint64)selector + selector2; i++) {
762 dissector_change_uint(table_name, (guint32)i, dissector_matching);
764 } else { /* op == '-' */
765 for (i = selector; i <= selector2; i++) {
766 dissector_change_uint(table_name, (guint32)i, dissector_matching);
773 /* The selector for this table is a string. */
774 dissector_change_string(table_name, selector_str, dissector_matching);
778 /* There are currently no dissector tables with any types other
779 than the ones listed above. */
780 g_assert_not_reached();
782 g_free(decoded_param); /* "Decode As" rule has been successfully added */
787 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
788 const gchar *message, gpointer user_data)
790 /* ignore log message, if log_level isn't interesting based
791 upon the console log preferences.
792 If the preferences haven't been loaded loaded yet, display the
795 The default console_log_level preference value is such that only
796 ERROR, CRITICAL and WARNING level messages are processed;
797 MESSAGE, INFO and DEBUG level messages are ignored.
799 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
800 ERROR and CRITICAL level messages so the current code is a behavioral
801 change. The current behavior is the same as in Wireshark.
803 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
804 prefs.console_log_level != 0) {
808 g_log_default_handler(log_domain, log_level, message, user_data);
813 output_file_description(const char *fname)
815 char *save_file_string;
817 /* Get a string that describes what we're writing to */
818 if (strcmp(fname, "-") == 0) {
819 /* We're writing to the standard output */
820 save_file_string = g_strdup("standard output");
822 /* We're writing to a file with the name in save_file */
823 save_file_string = g_strdup_printf("file \"%s\"", fname);
825 return save_file_string;
829 print_current_user(void) {
830 gchar *cur_user, *cur_group;
832 if (started_with_special_privs()) {
833 cur_user = get_cur_username();
834 cur_group = get_cur_groupname();
835 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
836 cur_user, cur_group);
839 if (running_with_special_privs()) {
840 fprintf(stderr, " This could be dangerous.");
842 fprintf(stderr, "\n");
847 check_capture_privs(void) {
850 /* Warn the user if npf.sys isn't loaded. */
851 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
852 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
853 "capturing or\nlisting interfaces.\n");
859 show_version(GString *comp_info_str, GString *runtime_info_str)
861 printf("TShark " VERSION "%s\n"
868 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
869 runtime_info_str->str);
873 main(int argc, char *argv[])
875 GString *comp_info_str;
876 GString *runtime_info_str;
877 char *init_progfile_dir_error;
879 struct option long_options[] = {
880 {"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT },
883 gboolean arg_error = FALSE;
889 char *gpf_path, *pf_path;
890 char *gdp_path, *dp_path;
891 int gpf_open_errno, gpf_read_errno;
892 int pf_open_errno, pf_read_errno;
893 int gdp_open_errno, gdp_read_errno;
894 int dp_open_errno, dp_read_errno;
896 volatile int exit_status = 0;
898 gboolean list_link_layer_types = FALSE;
899 gboolean start_capture = FALSE;
904 gboolean capture_option_specified = FALSE;
906 gboolean quiet = FALSE;
907 #ifdef PCAP_NG_DEFAULT
908 volatile int out_file_type = WTAP_FILE_PCAPNG;
910 volatile int out_file_type = WTAP_FILE_PCAP;
912 volatile gboolean out_file_name_res = FALSE;
913 gchar *volatile cf_name = NULL;
914 gchar *rfilter = NULL;
915 gchar *dfilter = NULL;
916 #ifdef HAVE_PCAP_OPEN_DEAD
917 struct bpf_program fcode;
919 dfilter_t *rfcode = NULL;
920 dfilter_t *dfcode = NULL;
925 gchar *output_only = NULL;
927 #ifdef HAVE_PCAP_REMOTE
928 #define OPTSTRING_A "A:"
930 #define OPTSTRING_A ""
933 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
934 #define OPTSTRING_B "B:"
936 #define OPTSTRING_B ""
937 #endif /* _WIN32 or HAVE_PCAP_CREATE */
938 #else /* HAVE_LIBPCAP */
939 #define OPTSTRING_B ""
940 #endif /* HAVE_LIBPCAP */
942 #ifdef HAVE_PCAP_CREATE
943 #define OPTSTRING_I "I"
945 #define OPTSTRING_I ""
948 /* the leading - ensures that getopt() does not permute the argv[] entries
949 we have to make sure that the first getopt() preserves the content of argv[]
950 for the subsequent getopt_long() call */
951 #define OPTSTRING "-2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:Y:z:"
953 static const char optstring[] = OPTSTRING;
955 /* Assemble the compile-time version information string */
956 comp_info_str = g_string_new("Compiled ");
957 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
959 /* Assemble the run-time version information string */
960 runtime_info_str = g_string_new("Running ");
961 get_runtime_version_info(runtime_info_str, NULL);
963 /* Add it to the information to be reported on a crash. */
964 ws_add_crash_info("TShark " VERSION "%s\n"
969 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
972 arg_list_utf_16to8(argc, argv);
973 create_app_running_mutex();
974 #if !GLIB_CHECK_VERSION(2,31,0)
980 * Get credential information for later use.
982 init_process_policies();
985 * Attempt to get the pathname of the executable file.
987 init_progfile_dir_error = init_progfile_dir(argv[0], main);
988 if (init_progfile_dir_error != NULL) {
989 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
990 init_progfile_dir_error);
994 * In order to have the -X opts assigned before the wslua machine starts
995 * we need to call getopts before epan_init() gets called.
998 optind_initial = optind;
1000 while ((opt = getopt(argc, argv, optstring)) != -1) {
1002 case 'C': /* Configuration Profile */
1003 if (profile_exists (optarg, FALSE)) {
1004 set_profile_name (optarg);
1006 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
1010 case 'P': /* Print packet summary info even when writing to a file */
1011 print_packet_info = TRUE;
1012 print_summary = TRUE;
1014 case 'O': /* Only output these protocols */
1015 output_only = g_strdup(optarg);
1017 case 'V': /* Verbose */
1018 print_details = TRUE;
1019 print_packet_info = TRUE;
1021 case 'x': /* Print packet data in hex (and ASCII) */
1023 /* The user asked for hex output, so let's ensure they get it,
1024 * even if they're writing to a file.
1026 print_packet_info = TRUE;
1037 * Print packet summary information is the default, unless either -V or -x
1038 * were specified and -P was not. Note that this is new behavior, which
1039 * allows for the possibility of printing only hex/ascii output without
1040 * necessarily requiring that either the summary or details be printed too.
1042 if (print_summary == -1)
1043 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1045 optind = optind_initial;
1050 /** Send All g_log messages to our own handler **/
1054 G_LOG_LEVEL_CRITICAL|
1055 G_LOG_LEVEL_WARNING|
1056 G_LOG_LEVEL_MESSAGE|
1059 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1061 g_log_set_handler(NULL,
1062 (GLogLevelFlags)log_flags,
1063 tshark_log_handler, NULL /* user_data */);
1064 g_log_set_handler(LOG_DOMAIN_MAIN,
1065 (GLogLevelFlags)log_flags,
1066 tshark_log_handler, NULL /* user_data */);
1069 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1070 (GLogLevelFlags)log_flags,
1071 tshark_log_handler, NULL /* user_data */);
1072 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1073 (GLogLevelFlags)log_flags,
1074 tshark_log_handler, NULL /* user_data */);
1077 initialize_funnel_ops();
1080 capture_opts_init(&global_capture_opts);
1081 capture_session_init(&global_capture_session, (void *)&cfile);
1084 timestamp_set_type(TS_RELATIVE);
1085 timestamp_set_precision(TS_PREC_AUTO);
1086 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1088 /* Register all dissectors; we must do this before checking for the
1089 "-G" flag, as the "-G" flag dumps information registered by the
1090 dissectors, and we must do it before we read the preferences, in
1091 case any dissectors register preferences. */
1092 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1093 failure_message, open_failure_message, read_failure_message,
1094 write_failure_message);
1096 /* Register all tap listeners; we do this before we parse the arguments,
1097 as the "-z" argument can specify a registered tap. */
1099 /* we register the plugin taps before the other taps because
1100 stats_tree taps plugins will be registered as tap listeners
1101 by stats_tree_stat.c and need to registered before that */
1103 register_all_plugin_tap_listeners();
1105 register_all_tap_listeners();
1107 /* If invoked with the "-G" flag, we dump out information based on
1108 the argument to the "-G" flag; if no argument is specified,
1109 for backwards compatibility we dump out a glossary of display
1112 XXX - we do this here, for now, to support "-G" with no arguments.
1113 If none of our build or other processes uses "-G" with no arguments,
1114 we can just process it with the other arguments. */
1115 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1116 proto_initialize_all_prefixes();
1119 proto_registrar_dump_fields();
1121 if (strcmp(argv[2], "fields") == 0)
1122 proto_registrar_dump_fields();
1123 else if (strcmp(argv[2], "protocols") == 0)
1124 proto_registrar_dump_protocols();
1125 else if (strcmp(argv[2], "values") == 0)
1126 proto_registrar_dump_values();
1127 else if (strcmp(argv[2], "ftypes") == 0)
1128 proto_registrar_dump_ftypes();
1129 else if (strcmp(argv[2], "decodes") == 0)
1130 dissector_dump_decodes();
1131 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1132 dissector_dump_heur_decodes();
1133 else if (strcmp(argv[2], "defaultprefs") == 0)
1135 else if (strcmp(argv[2], "plugins") == 0)
1137 else if (strcmp(argv[2], "?") == 0)
1138 glossary_option_help();
1139 else if (strcmp(argv[2], "-?") == 0)
1140 glossary_option_help();
1141 else if (strcmp(argv[2], "currentprefs") == 0) {
1142 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1143 &pf_open_errno, &pf_read_errno, &pf_path);
1146 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1153 /* Set the C-language locale to the native environment. */
1154 setlocale(LC_ALL, "");
1156 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1157 &pf_open_errno, &pf_read_errno, &pf_path);
1158 if (gpf_path != NULL) {
1159 if (gpf_open_errno != 0) {
1160 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1161 pf_path, g_strerror(gpf_open_errno));
1163 if (gpf_read_errno != 0) {
1164 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1165 pf_path, g_strerror(gpf_read_errno));
1168 if (pf_path != NULL) {
1169 if (pf_open_errno != 0) {
1170 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1171 g_strerror(pf_open_errno));
1173 if (pf_read_errno != 0) {
1174 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1175 pf_path, g_strerror(pf_read_errno));
1181 /* Read the disabled protocols file. */
1182 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1183 &dp_path, &dp_open_errno, &dp_read_errno);
1184 if (gdp_path != NULL) {
1185 if (gdp_open_errno != 0) {
1186 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1187 gdp_path, g_strerror(gdp_open_errno));
1189 if (gdp_read_errno != 0) {
1190 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1191 gdp_path, g_strerror(gdp_read_errno));
1195 if (dp_path != NULL) {
1196 if (dp_open_errno != 0) {
1198 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1199 g_strerror(dp_open_errno));
1201 if (dp_read_errno != 0) {
1203 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1204 g_strerror(dp_read_errno));
1209 check_capture_privs();
1211 cap_file_init(&cfile);
1213 /* Print format defaults to this. */
1214 print_format = PR_FMT_TEXT;
1216 output_fields = output_fields_new();
1218 /* Now get our args */
1219 while ((opt = getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
1221 case '2': /* Perform two pass analysis */
1222 perform_two_pass_analysis = TRUE;
1224 case 'a': /* autostop criteria */
1225 case 'b': /* Ringbuffer option */
1226 case 'c': /* Capture x packets */
1227 case 'f': /* capture filter */
1228 case 'g': /* enable group read access on file(s) */
1229 case 'i': /* Use interface x */
1230 case 'p': /* Don't capture in promiscuous mode */
1231 #ifdef HAVE_PCAP_REMOTE
1232 case 'A': /* Authentication */
1234 #ifdef HAVE_PCAP_CREATE
1235 case 'I': /* Capture in monitor mode, if available */
1237 case 's': /* Set the snapshot (capture) length */
1238 case 'w': /* Write to capture file x */
1239 case 'y': /* Set the pcap data link type */
1240 case LONGOPT_NUM_CAP_COMMENT: /* add a capture comment */
1241 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1242 case 'B': /* Buffer size */
1243 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1245 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1250 capture_option_specified = TRUE;
1255 /* Configuration profile settings were already processed just ignore them this time*/
1257 case 'd': /* Decode as rule */
1258 if (!add_decode_as(optarg))
1261 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1262 case 'K': /* Kerberos keytab file */
1263 read_keytab_file(optarg);
1266 case 'D': /* Print a list of capture devices and exit */
1268 if_list = capture_interface_list(&err, &err_str,NULL);
1269 if (if_list == NULL) {
1271 case CANT_GET_INTERFACE_LIST:
1272 case DONT_HAVE_PCAP:
1273 cmdarg_err("%s", err_str);
1277 case NO_INTERFACES_FOUND:
1278 cmdarg_err("There are no interfaces on which a capture can be done");
1283 capture_opts_print_interfaces(if_list);
1284 free_interface_list(if_list);
1287 capture_option_specified = TRUE;
1293 output_fields_add(output_fields, optarg);
1297 if (!output_fields_set_option(output_fields, optarg)) {
1298 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1299 output_fields_list_options(stderr);
1304 out_file_type = wtap_short_string_to_file_type(optarg);
1305 if (out_file_type < 0) {
1306 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1307 list_capture_types();
1311 case 'W': /* Select extra information to save in our capture file */
1312 /* This is patterned after the -N flag which may not be the best idea. */
1313 if (strchr(optarg, 'n')) {
1314 out_file_name_res = TRUE;
1316 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1320 case 'H': /* Read address to name mappings from a hosts file */
1321 if (! add_hosts_file(optarg))
1323 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1326 out_file_name_res = TRUE;
1329 case 'h': /* Print help and exit */
1333 case 'l': /* "Line-buffer" standard output */
1334 /* This isn't line-buffering, strictly speaking, it's just
1335 flushing the standard output after the information for
1336 each packet is printed; however, that should be good
1337 enough for all the purposes to which "-l" is put (and
1338 is probably actually better for "-V", as it does fewer
1341 See the comment in "process_packet()" for an explanation of
1342 why we do that, and why we don't just use "setvbuf()" to
1343 make the standard output line-buffered (short version: in
1344 Windows, "line-buffered" is the same as "fully-buffered",
1345 and the output buffer is only flushed when it fills up). */
1346 line_buffered = TRUE;
1348 case 'L': /* Print list of link-layer types and exit */
1350 list_link_layer_types = TRUE;
1352 capture_option_specified = TRUE;
1356 case 'n': /* No name resolution */
1357 gbl_resolv_flags.mac_name = FALSE;
1358 gbl_resolv_flags.network_name = FALSE;
1359 gbl_resolv_flags.transport_name = FALSE;
1360 gbl_resolv_flags.concurrent_dns = FALSE;
1362 case 'N': /* Select what types of addresses/port #s to resolve */
1363 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1364 if (badopt != '\0') {
1365 cmdarg_err("-N specifies unknown resolving option '%c';",
1367 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1371 case 'o': /* Override preference from command line */
1372 switch (prefs_set_pref(optarg)) {
1377 case PREFS_SET_SYNTAX_ERR:
1378 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1382 case PREFS_SET_NO_SUCH_PREF:
1383 case PREFS_SET_OBSOLETE:
1384 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1389 case 'q': /* Quiet */
1392 case 'Q': /* Really quiet */
1394 really_quiet = TRUE;
1396 case 'r': /* Read capture file x */
1397 cf_name = g_strdup(optarg);
1399 case 'R': /* Read file filter */
1403 /* already processed; just ignore it now */
1405 case 'S': /* Set the line Separator to be printed between packets */
1406 separator = strdup(optarg);
1408 case 't': /* Time stamp type */
1409 if (strcmp(optarg, "r") == 0)
1410 timestamp_set_type(TS_RELATIVE);
1411 else if (strcmp(optarg, "a") == 0)
1412 timestamp_set_type(TS_ABSOLUTE);
1413 else if (strcmp(optarg, "ad") == 0)
1414 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1415 else if (strcmp(optarg, "d") == 0)
1416 timestamp_set_type(TS_DELTA);
1417 else if (strcmp(optarg, "dd") == 0)
1418 timestamp_set_type(TS_DELTA_DIS);
1419 else if (strcmp(optarg, "e") == 0)
1420 timestamp_set_type(TS_EPOCH);
1421 else if (strcmp(optarg, "u") == 0)
1422 timestamp_set_type(TS_UTC);
1423 else if (strcmp(optarg, "ud") == 0)
1424 timestamp_set_type(TS_UTC_WITH_DATE);
1426 cmdarg_err("Invalid time stamp type \"%s\"",
1428 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1429 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1430 cmdarg_err_cont("or \"ud\" for UTC with date.");
1434 case 'T': /* printing Type */
1435 if (strcmp(optarg, "text") == 0) {
1436 output_action = WRITE_TEXT;
1437 print_format = PR_FMT_TEXT;
1438 } else if (strcmp(optarg, "ps") == 0) {
1439 output_action = WRITE_TEXT;
1440 print_format = PR_FMT_PS;
1441 } else if (strcmp(optarg, "pdml") == 0) {
1442 output_action = WRITE_XML;
1443 print_details = TRUE; /* Need details */
1444 print_summary = FALSE; /* Don't allow summary */
1445 } else if (strcmp(optarg, "psml") == 0) {
1446 output_action = WRITE_XML;
1447 print_details = FALSE; /* Don't allow details */
1448 print_summary = TRUE; /* Need summary */
1449 } else if (strcmp(optarg, "fields") == 0) {
1450 output_action = WRITE_FIELDS;
1451 print_details = TRUE; /* Need full tree info */
1452 print_summary = FALSE; /* Don't allow summary */
1454 cmdarg_err("Invalid -T parameter.");
1455 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1459 case 'u': /* Seconds type */
1460 if (strcmp(optarg, "s") == 0)
1461 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1462 else if (strcmp(optarg, "hms") == 0)
1463 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1465 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1466 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1470 case 'v': /* Show version and exit */
1472 show_version(comp_info_str, runtime_info_str);
1473 g_string_free(comp_info_str, TRUE);
1474 g_string_free(runtime_info_str, TRUE);
1475 /* We don't really have to cleanup here, but it's a convenient way to test
1476 * start-up and shut-down of the epan library without any UI-specific
1477 * cruft getting in the way. Makes the results of running
1478 * $ ./tools/valgrind-wireshark -n
1479 * much more useful. */
1483 case 'O': /* Only output these protocols */
1484 /* already processed; just ignore it now */
1486 case 'V': /* Verbose */
1487 /* already processed; just ignore it now */
1489 case 'x': /* Print packet data in hex (and ASCII) */
1490 /* already processed; just ignore it now */
1498 /* We won't call the init function for the stat this soon
1499 as it would disallow MATE's fields (which are registered
1500 by the preferences set callback) from being used as
1501 part of a tap filter. Instead, we just add the argument
1502 to a list of stat arguments. */
1503 if (!process_stat_cmd_arg(optarg)) {
1504 if (strcmp("help", optarg)==0) {
1505 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1506 list_stat_cmd_args();
1509 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1510 cmdarg_err_cont(" -z argument must be one of :");
1511 list_stat_cmd_args();
1516 case '?': /* Bad flag - print usage message */
1519 list_capture_types();
1529 /* If we specified output fields, but not the output field type... */
1530 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1531 cmdarg_err("Output fields were specified with \"-e\", "
1532 "but \"-Tfields\" was not specified.");
1534 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1535 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1536 "specified with \"-e\".");
1541 /* If no capture filter or display filter has been specified, and there are
1542 still command-line arguments, treat them as the tokens of a capture
1543 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1544 flag was specified. */
1545 if (optind < argc) {
1546 if (cf_name != NULL) {
1547 if (dfilter != NULL) {
1548 cmdarg_err("Display filters were specified both with \"-d\" "
1549 "and with additional command-line arguments.");
1552 dfilter = get_args_as_string(argc, argv, optind);
1557 if (global_capture_opts.default_options.cfilter) {
1558 cmdarg_err("A default capture filter was specified both with \"-f\""
1559 " and with additional command-line arguments.");
1562 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1563 interface_options interface_opts;
1564 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1565 if (interface_opts.cfilter == NULL) {
1566 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1567 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1568 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1570 cmdarg_err("A capture filter was specified both with \"-f\""
1571 " and with additional command-line arguments.");
1575 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1577 capture_option_specified = TRUE;
1583 if (!global_capture_opts.saving_to_file) {
1584 /* We're not saving the capture to a file; if "-q" wasn't specified,
1585 we should print packet information */
1587 print_packet_info = TRUE;
1589 /* We're saving to a file; if we're writing to the standard output.
1590 and we'll also be writing dissected packets to the standard
1591 output, reject the request. At best, we could redirect that
1592 to the standard error; we *can't* write both to the standard
1593 output and have either of them be useful. */
1594 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1595 cmdarg_err("You can't write both raw packet data and dissected packets"
1596 " to the standard output.");
1601 /* We're not saving the capture to a file; if "-q" wasn't specified,
1602 we should print packet information */
1604 print_packet_info = TRUE;
1607 #ifndef HAVE_LIBPCAP
1608 if (capture_option_specified)
1609 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1617 if (output_action != WRITE_TEXT) {
1618 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1623 if (output_only != NULL) {
1626 if (!print_details) {
1627 cmdarg_err("-O requires -V");
1631 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1632 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1633 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1637 if (rfilter != NULL && !perform_two_pass_analysis) {
1638 /* Just a warning, so we don't return */
1639 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1643 if (list_link_layer_types) {
1644 /* We're supposed to list the link-layer types for an interface;
1645 did the user also specify a capture file to be read? */
1647 /* Yes - that's bogus. */
1648 cmdarg_err("You can't specify -L and a capture file to be read.");
1651 /* No - did they specify a ring buffer option? */
1652 if (global_capture_opts.multi_files_on) {
1653 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1659 * "-r" was specified, so we're reading a capture file.
1660 * Capture options don't apply here.
1663 /* We don't support capture filters when reading from a capture file
1664 (the BPF compiler doesn't support all link-layer types that we
1665 support in capture files we read). */
1666 if (global_capture_opts.default_options.cfilter) {
1667 cmdarg_err("Only read filters, not capture filters, "
1668 "can be specified when reading a capture file.");
1671 if (global_capture_opts.multi_files_on) {
1672 cmdarg_err("Multiple capture files requested, but "
1673 "a capture isn't being done.");
1676 if (global_capture_opts.has_file_duration) {
1677 cmdarg_err("Switching capture files after a time interval was specified, but "
1678 "a capture isn't being done.");
1681 if (global_capture_opts.has_ring_num_files) {
1682 cmdarg_err("A ring buffer of capture files was specified, but "
1683 "a capture isn't being done.");
1686 if (global_capture_opts.has_autostop_files) {
1687 cmdarg_err("A maximum number of capture files was specified, but "
1688 "a capture isn't being done.");
1691 if (global_capture_opts.capture_comment) {
1692 cmdarg_err("A capture comment was specified, but "
1693 "a capture isn't being done.\nThere's no support for adding "
1694 "a capture comment to an existing capture file.");
1698 /* Note: TShark now allows the restriction of a _read_ file by packet count
1699 * and byte count as well as a write file. Other autostop options remain valid
1700 * only for a write file.
1702 if (global_capture_opts.has_autostop_duration) {
1703 cmdarg_err("A maximum capture time was specified, but "
1704 "a capture isn't being done.");
1709 * "-r" wasn't specified, so we're doing a live capture.
1711 if (global_capture_opts.saving_to_file) {
1712 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1714 /* When capturing, we only support writing pcap or pcap-ng format. */
1715 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1716 cmdarg_err("Live captures can only be saved in libpcap format.");
1719 if (global_capture_opts.capture_comment && out_file_type != WTAP_FILE_PCAPNG) {
1720 cmdarg_err("A capture comment can only be written to a pcapng file.");
1723 if (global_capture_opts.multi_files_on) {
1724 /* Multiple-file mode doesn't work under certain conditions:
1725 a) it doesn't work if you're writing to the standard output;
1726 b) it doesn't work if you're writing to a pipe;
1728 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1729 cmdarg_err("Multiple capture files requested, but "
1730 "the capture is being written to the standard output.");
1733 if (global_capture_opts.output_to_pipe) {
1734 cmdarg_err("Multiple capture files requested, but "
1735 "the capture file is a pipe.");
1738 if (!global_capture_opts.has_autostop_filesize &&
1739 !global_capture_opts.has_file_duration) {
1740 cmdarg_err("Multiple capture files requested, but "
1741 "no maximum capture file size or duration was specified.");
1745 /* Currently, we don't support read or display filters when capturing
1746 and saving the packets. */
1747 if (rfilter != NULL) {
1748 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1751 if (dfilter != NULL) {
1752 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1756 /* They didn't specify a "-w" flag, so we won't be saving to a
1757 capture file. Check for options that only make sense if
1758 we're saving to a file. */
1759 if (global_capture_opts.has_autostop_filesize) {
1760 cmdarg_err("Maximum capture file size specified, but "
1761 "capture isn't being saved to a file.");
1764 if (global_capture_opts.multi_files_on) {
1765 cmdarg_err("Multiple capture files requested, but "
1766 "the capture isn't being saved to a file.");
1769 if (global_capture_opts.capture_comment) {
1770 cmdarg_err("A capture comment was specified, but "
1771 "the capture isn't being saved to a file.");
1780 /* Start windows sockets */
1781 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1784 /* Notify all registered modules that have had any of their preferences
1785 changed either from one of the preferences file or from the command
1786 line that their preferences have changed. */
1789 /* At this point MATE will have registered its field array so we can
1790 have a tap filter with one of MATE's late-registered fields as part
1791 of the filter. We can now process all the "-z" arguments. */
1792 start_requested_stats();
1795 /* We currently don't support taps, or printing dissected packets,
1796 if we're writing to a pipe. */
1797 if (global_capture_opts.saving_to_file &&
1798 global_capture_opts.output_to_pipe) {
1799 if (tap_listeners_require_dissection()) {
1800 cmdarg_err("Taps aren't supported when saving to a pipe.");
1803 if (print_packet_info) {
1804 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1810 /* disabled protocols as per configuration file */
1811 if (gdp_path == NULL && dp_path == NULL) {
1812 set_disabled_protos_list();
1815 /* Build the column format array */
1816 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1819 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1820 capture_opts_trim_ring_num_files(&global_capture_opts);
1823 if (rfilter != NULL) {
1824 if (!dfilter_compile(rfilter, &rfcode)) {
1825 cmdarg_err("%s", dfilter_error_msg);
1827 #ifdef HAVE_PCAP_OPEN_DEAD
1831 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1833 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1835 " Note: That read filter code looks like a valid capture filter;");
1837 " maybe you mixed them up?");
1846 cfile.rfcode = rfcode;
1848 if (dfilter != NULL) {
1849 if (!dfilter_compile(dfilter, &dfcode)) {
1850 cmdarg_err("%s", dfilter_error_msg);
1852 #ifdef HAVE_PCAP_OPEN_DEAD
1856 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1858 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1860 " Note: That display filter code looks like a valid capture filter;");
1862 " maybe you mixed them up?");
1871 cfile.dfcode = dfcode;
1873 if (print_packet_info) {
1874 /* If we're printing as text or PostScript, we have
1875 to create a print stream. */
1876 if (output_action == WRITE_TEXT) {
1877 switch (print_format) {
1880 print_stream = print_stream_text_stdio_new(stdout);
1884 print_stream = print_stream_ps_stdio_new(stdout);
1888 g_assert_not_reached();
1893 /* We have to dissect each packet if:
1895 we're printing information about each packet;
1897 we're using a read filter on the packets;
1899 we're using a display filter on the packets;
1901 we're using any taps that need dissection. */
1902 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1906 * We're reading a capture file.
1910 * Immediately relinquish any special privileges we have; we must not
1911 * be allowed to read any capture files the user running TShark
1914 relinquish_special_privs_perm();
1915 print_current_user();
1917 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1922 /* Set timestamp precision; there should arguably be a command-line
1923 option to let the user set this. */
1924 switch(wtap_file_tsprecision(cfile.wth)) {
1925 case(WTAP_FILE_TSPREC_SEC):
1926 timestamp_set_precision(TS_PREC_AUTO_SEC);
1928 case(WTAP_FILE_TSPREC_DSEC):
1929 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1931 case(WTAP_FILE_TSPREC_CSEC):
1932 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1934 case(WTAP_FILE_TSPREC_MSEC):
1935 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1937 case(WTAP_FILE_TSPREC_USEC):
1938 timestamp_set_precision(TS_PREC_AUTO_USEC);
1940 case(WTAP_FILE_TSPREC_NSEC):
1941 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1944 g_assert_not_reached();
1947 /* Process the packets in the file */
1950 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1951 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1952 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1954 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1957 CATCH(OutOfMemoryError) {
1961 "Sorry, but TShark has to terminate now!\n"
1963 "Some infos / workarounds can be found at:\n"
1964 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1969 /* We still dump out the results of taps, etc., as we might have
1970 read some packets; however, we exit with an error status. */
1974 /* No capture file specified, so we're supposed to do a live capture
1975 or get a list of link-layer types for a live capture device;
1976 do we have support for live captures? */
1978 /* if no interface was specified, pick a default */
1979 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1980 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1981 if (exit_status != 0)
1984 /* if requested, list the link layer types and exit */
1985 if (list_link_layer_types) {
1988 /* Get the list of link-layer types for the capture devices. */
1989 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1990 interface_options interface_opts;
1991 if_capabilities_t *caps;
1993 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1994 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1996 cmdarg_err("%s", err_str);
2000 if (caps->data_link_types == NULL) {
2001 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
2004 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
2005 free_if_capabilities(caps);
2010 if (print_packet_info) {
2011 if (!write_preamble(NULL)) {
2012 show_print_file_io_error(errno);
2015 } else if (!quiet) {
2017 * We're not printing information for each packet, and the user
2018 * didn't ask us not to print a count of packets as they arrive,
2019 * so print that count so the user knows that packets are arriving.
2021 * XXX - what if the user wants to do a live capture, doesn't want
2022 * to save it to a file, doesn't want information printed for each
2023 * packet, does want some "-z" statistic, and wants packet counts
2024 * so they know whether they're seeing any packets?
2026 print_packet_counts = TRUE;
2029 /* For now, assume libpcap gives microsecond precision. */
2030 timestamp_set_precision(TS_PREC_AUTO_USEC);
2033 * XXX - this returns FALSE if an error occurred, but it also
2034 * returns FALSE if the capture stops because a time limit
2035 * was reached (and possibly other limits), so we can't assume
2036 * it means an error.
2038 * The capture code is a bit twisty, so it doesn't appear to
2039 * be an easy fix. We just ignore the return value for now.
2040 * Instead, pass on the exit status from the capture child.
2043 exit_status = global_capture_session.fork_child_status;
2045 if (print_packet_info) {
2046 if (!write_finale()) {
2048 show_print_file_io_error(err);
2052 /* No - complain. */
2053 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2060 if (cfile.frames != NULL) {
2061 free_frame_data_sequence(cfile.frames);
2062 cfile.frames = NULL;
2065 draw_tap_listeners(TRUE);
2066 funnel_dump_all_text_windows();
2069 output_fields_free(output_fields);
2070 output_fields = NULL;
2075 /*#define USE_BROKEN_G_MAIN_LOOP*/
2077 #ifdef USE_BROKEN_G_MAIN_LOOP
2080 gboolean loop_running = FALSE;
2082 guint32 packet_count = 0;
2085 /* XXX - move to the right position / file */
2086 /* read from a pipe (callback) */
2087 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2089 typedef struct pipe_input_tag {
2093 pipe_input_cb_t input_cb;
2094 guint pipe_input_id;
2096 GMutex *callback_running;
2100 static pipe_input_t pipe_input;
2103 /* The timer has expired, see if there's stuff to read from the pipe,
2104 if so, do the callback */
2106 pipe_timer_cb(gpointer data)
2112 pipe_input_t *pipe_input_p = data;
2113 gint iterations = 0;
2115 g_mutex_lock (pipe_input_p->callback_running);
2117 /* try to read data from the pipe only 5 times, to avoid blocking */
2118 while(iterations < 5) {
2119 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2121 /* Oddly enough although Named pipes don't work on win9x,
2122 PeekNamedPipe does !!! */
2123 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2124 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2126 /* Get the child process exit status */
2127 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2130 /* If the Peek returned an error, or there are bytes to be read
2131 or the childwatcher thread has terminated then call the normal
2133 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2135 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2137 /* And call the real handler */
2138 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2139 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2140 /* pipe closed, return false so that the timer is stopped */
2141 g_mutex_unlock (pipe_input_p->callback_running);
2146 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2147 /* No data, stop now */
2154 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2156 g_mutex_unlock (pipe_input_p->callback_running);
2158 /* we didn't stopped the timer, so let it run */
2165 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2168 pipe_input.source = source;
2169 pipe_input.child_process = child_process;
2170 pipe_input.user_data = user_data;
2171 pipe_input.input_cb = input_cb;
2174 #if GLIB_CHECK_VERSION(2,31,0)
2175 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2176 g_mutex_init(pipe_input.callback_running);
2178 pipe_input.callback_running = g_mutex_new();
2180 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2181 do this but that doesn't cover all win32 platforms. GTK can do
2182 this but doesn't seem to work over processes. Attempt to do
2183 something similar here, start a timer and check for data on every
2185 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2186 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2190 static const nstime_t *
2191 tshark_get_frame_ts(void *data, guint32 frame_num)
2193 capture_file *cf = (capture_file *) data;
2195 if (ref && ref->num == frame_num)
2196 return &ref->abs_ts;
2198 if (prev_dis && prev_dis->num == frame_num)
2199 return &prev_dis->abs_ts;
2201 if (prev_cap && prev_cap->num == frame_num)
2202 return &prev_cap->abs_ts;
2205 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2207 return (fd) ? &fd->abs_ts : NULL;
2214 tshark_epan_new(capture_file *cf)
2216 epan_t *epan = epan_new();
2219 epan->get_frame_ts = tshark_get_frame_ts;
2220 epan->get_interface_name = cap_file_get_interface_name;
2221 epan->get_user_comment = NULL;
2232 GString *str = g_string_new("");
2233 #ifdef USE_TSHARK_SELECT
2237 struct sigaction action, oldaction;
2241 * XXX - dropping privileges is still required, until code cleanup is done
2243 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2244 * when it's done, we don't need special privileges to run tshark at all,
2245 * therefore we don't need to drop these privileges
2246 * The only thing we might want to keep is a warning if tshark is run as root,
2247 * as it's no longer necessary and potentially dangerous.
2249 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2250 * We've opened the capture device, so we shouldn't need any special
2251 * privileges any more; relinquish those privileges.
2253 * XXX - if we have saved set-user-ID support, we should give up those
2254 * privileges immediately, and then reclaim them long enough to get
2255 * a list of network interfaces and to open one, and then give them
2256 * up again, so that stuff we do while processing the argument list,
2257 * reading the user's preferences, loading and starting plugins
2258 * (especially *user* plugins), etc. is done with the user's privileges,
2259 * not special privileges.
2261 relinquish_special_privs_perm();
2262 print_current_user();
2264 /* Create new dissection section. */
2265 epan_free(cfile.epan);
2266 cfile.epan = tshark_epan_new(&cfile);
2269 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2270 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2272 /* Catch SIGINT and SIGTERM and, if we get either of them,
2273 clean up and exit. If SIGHUP isn't being ignored, catch
2274 it too and, if we get it, clean up and exit.
2276 We restart any read that was in progress, so that it doesn't
2277 disrupt reading from the sync pipe. The signal handler tells
2278 the capture child to finish; it will report that it finished,
2279 or will exit abnormally, so we'll stop reading from the sync
2280 pipe, pick up the exit status, and quit. */
2281 memset(&action, 0, sizeof(action));
2282 action.sa_handler = capture_cleanup;
2283 action.sa_flags = SA_RESTART;
2284 sigemptyset(&action.sa_mask);
2285 sigaction(SIGTERM, &action, NULL);
2286 sigaction(SIGINT, &action, NULL);
2287 sigaction(SIGHUP, NULL, &oldaction);
2288 if (oldaction.sa_handler == SIG_DFL)
2289 sigaction(SIGHUP, &action, NULL);
2292 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2293 quiet mode, report the number of packets we've captured.
2295 Again, restart any read that was in progress, so that it doesn't
2296 disrupt reading from the sync pipe. */
2297 action.sa_handler = report_counts_siginfo;
2298 action.sa_flags = SA_RESTART;
2299 sigemptyset(&action.sa_mask);
2300 sigaction(SIGINFO, &action, NULL);
2301 #endif /* SIGINFO */
2304 global_capture_session.state = CAPTURE_PREPARING;
2306 /* Let the user know which interfaces were chosen. */
2307 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2308 interface_options interface_opts;
2310 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2311 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2312 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2313 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2316 if (global_capture_opts.ifaces->len < 2) {
2318 if (global_capture_opts.ifaces->len < 4) {
2320 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2321 interface_options interface_opts;
2323 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2325 if (global_capture_opts.ifaces->len > 2) {
2326 g_string_append_printf(str, ",");
2328 g_string_append_printf(str, " ");
2329 if (i == global_capture_opts.ifaces->len - 1) {
2330 g_string_append_printf(str, "and ");
2333 g_string_append_printf(str, "'%s'", interface_opts.descr);
2336 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2338 if (really_quiet == FALSE)
2339 fprintf(stderr, "Capturing on %s\n", str->str);
2341 g_string_free(str, TRUE);
2343 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2348 /* the actual capture loop
2350 * XXX - glib doesn't seem to provide any event based loop handling.
2352 * XXX - for whatever reason,
2353 * calling g_main_loop_new() ends up in 100% cpu load.
2355 * But that doesn't matter: in UNIX we can use select() to find an input
2356 * source with something to do.
2358 * But that doesn't matter because we're in a CLI (that doesn't need to
2359 * update a GUI or something at the same time) so it's OK if we block
2360 * trying to read from the pipe.
2362 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2363 * wrong (but I leave it there in case I am...).
2366 #ifdef USE_TSHARK_SELECT
2368 FD_SET(pipe_input.source, &readfds);
2371 loop_running = TRUE;
2375 while (loop_running)
2377 #ifdef USE_TSHARK_SELECT
2378 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2384 } else if (ret == 1) {
2386 /* Call the real handler */
2387 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2388 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2391 #ifdef USE_TSHARK_SELECT
2396 CATCH(OutOfMemoryError) {
2400 "Sorry, but TShark has to terminate now!\n"
2402 "Some infos / workarounds can be found at:\n"
2403 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2410 /* capture child detected an error */
2412 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2414 cmdarg_err("%s", error_msg);
2415 cmdarg_err_cont("%s", secondary_error_msg);
2419 /* capture child detected an capture filter related error */
2421 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2423 capture_options *capture_opts = cap_session->capture_opts;
2424 dfilter_t *rfcode = NULL;
2425 interface_options interface_opts;
2427 g_assert(i < capture_opts->ifaces->len);
2428 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2430 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2432 "Invalid capture filter \"%s\" for interface %s!\n"
2434 "That string looks like a valid display filter; however, it isn't a valid\n"
2435 "capture filter (%s).\n"
2437 "Note that display filters and capture filters don't have the same syntax,\n"
2438 "so you can't use most display filter expressions as capture filters.\n"
2440 "See the User's Guide for a description of the capture filter syntax.",
2441 interface_opts.cfilter, interface_opts.descr, error_message);
2442 dfilter_free(rfcode);
2445 "Invalid capture filter \"%s\" for interface %s!\n"
2447 "That string isn't a valid capture filter (%s).\n"
2448 "See the User's Guide for a description of the capture filter syntax.",
2449 interface_opts.cfilter, interface_opts.descr, error_message);
2454 /* capture child tells us we have a new (or the first) capture file */
2456 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2458 capture_options *capture_opts = cap_session->capture_opts;
2459 gboolean is_tempfile;
2462 if (cap_session->state == CAPTURE_PREPARING) {
2463 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2465 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2467 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2469 /* free the old filename */
2470 if (capture_opts->save_file != NULL) {
2472 /* we start a new capture file, close the old one (if we had one before) */
2473 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2474 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2475 wtap_close(((capture_file *) cap_session->cf)->wth);
2477 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2480 g_free(capture_opts->save_file);
2481 is_tempfile = FALSE;
2483 /* we didn't had a save_file before, must be a tempfile */
2487 /* save the new filename */
2488 capture_opts->save_file = g_strdup(new_file);
2490 /* if we are in real-time mode, open the new file now */
2491 if (do_dissection) {
2492 /* Attempt to open the capture file and set up to read from it. */
2493 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2497 /* Don't unlink (delete) the save file - leave it around,
2498 for debugging purposes. */
2499 g_free(capture_opts->save_file);
2500 capture_opts->save_file = NULL;
2505 cap_session->state = CAPTURE_RUNNING;
2511 /* capture child tells us we have new packets to read */
2513 capture_input_new_packets(capture_session *cap_session, int to_read)
2519 capture_file *cf = (capture_file *)cap_session->cf;
2520 gboolean filtering_tap_listeners;
2525 * Prevent a SIGINFO handler from writing to the standard error while
2526 * we're doing so or writing to the standard output; instead, have it
2527 * just set a flag telling us to print that information when we're done.
2530 #endif /* SIGINFO */
2532 /* Do we have any tap listeners with filters? */
2533 filtering_tap_listeners = have_filtering_tap_listeners();
2535 /* Get the union of the flags for all tap listeners. */
2536 tap_flags = union_of_tap_listener_flags();
2538 if (do_dissection) {
2539 while (to_read-- && cf->wth) {
2540 wtap_cleareof(cf->wth);
2541 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2543 /* read from file failed, tell the capture child to stop */
2544 sync_pipe_stop(cap_session);
2545 wtap_close(cf->wth);
2548 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2549 wtap_buf_ptr(cf->wth),
2550 filtering_tap_listeners, tap_flags);
2553 /* packet successfully read and gone through the "Read Filter" */
2559 * Dumpcap's doing all the work; we're not doing any dissection.
2560 * Count all the packets it wrote.
2562 packet_count += to_read;
2565 if (print_packet_counts) {
2566 /* We're printing packet counts. */
2567 if (packet_count != 0) {
2568 fprintf(stderr, "\r%u ", packet_count);
2569 /* stderr could be line buffered */
2576 * Allow SIGINFO handlers to write.
2581 * If a SIGINFO handler asked us to write out capture counts, do so.
2585 #endif /* SIGINFO */
2591 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2592 /* Report the count only if we aren't printing a packet count
2593 as packets arrive. */
2594 fprintf(stderr, "%u packet%s captured\n", packet_count,
2595 plurality(packet_count, "", "s"));
2598 infoprint = FALSE; /* we just reported it */
2599 #endif /* SIGINFO */
2604 report_counts_siginfo(int signum _U_)
2606 int sav_errno = errno;
2607 /* If we've been told to delay printing, just set a flag asking
2608 that we print counts (if we're supposed to), otherwise print
2609 the count of packets captured (if we're supposed to). */
2616 #endif /* SIGINFO */
2619 /* capture child detected any packet drops? */
2621 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2623 if (print_packet_counts) {
2624 /* We're printing packet counts to stderr.
2625 Send a newline so that we move to the line after the packet count. */
2626 fprintf(stderr, "\n");
2630 /* We're printing packet counts to stderr.
2631 Send a newline so that we move to the line after the packet count. */
2632 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2638 * Capture child closed its side of the pipe, report any error and
2639 * do the required cleanup.
2642 capture_input_closed(capture_session *cap_session, gchar *msg)
2644 capture_file *cf = (capture_file *) cap_session->cf;
2647 fprintf(stderr, "tshark: %s\n", msg);
2651 if (cf != NULL && cf->wth != NULL) {
2652 wtap_close(cf->wth);
2653 if (cf->is_tempfile) {
2654 ws_unlink(cf->filename);
2657 #ifdef USE_BROKEN_G_MAIN_LOOP
2658 /*g_main_loop_quit(loop);*/
2661 loop_running = FALSE;
2670 capture_cleanup(DWORD ctrltype _U_)
2672 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2673 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2674 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2675 like SIGTERM at least when the machine's shutting down.
2677 For now, we handle them all as indications that we should clean up
2678 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2681 We must return TRUE so that no other handler - such as one that would
2682 terminate the process - gets called.
2684 XXX - for some reason, typing ^C to TShark, if you run this in
2685 a Cygwin console window in at least some versions of Cygwin,
2686 causes TShark to terminate immediately; this routine gets
2687 called, but the main loop doesn't get a chance to run and
2688 exit cleanly, at least if this is compiled with Microsoft Visual
2689 C++ (i.e., it's a property of the Cygwin console window or Bash;
2690 it happens if TShark is not built with Cygwin - for all I know,
2691 building it with Cygwin may make the problem go away). */
2693 /* tell the capture child to stop */
2694 sync_pipe_stop(&global_capture_session);
2696 /* don't stop our own loop already here, otherwise status messages and
2697 * cleanup wouldn't be done properly. The child will indicate the stop of
2698 * everything by calling capture_input_closed() later */
2704 capture_cleanup(int signum _U_)
2706 /* tell the capture child to stop */
2707 sync_pipe_stop(&global_capture_session);
2709 /* don't stop our own loop already here, otherwise status messages and
2710 * cleanup wouldn't be done properly. The child will indicate the stop of
2711 * everything by calling capture_input_closed() later */
2714 #endif /* HAVE_LIBPCAP */
2717 process_packet_first_pass(capture_file *cf,
2718 gint64 offset, struct wtap_pkthdr *whdr,
2723 gboolean create_proto_tree = FALSE;
2727 /* The frame number of this packet is one more than the count of
2728 frames in this packet. */
2729 framenum = cf->count + 1;
2731 /* If we're not running a display filter and we're not printing any
2732 packet information, we don't need to do a dissection. This means
2733 that all packets can be marked as 'passed'. */
2736 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2738 /* If we're going to print packet information, or we're going to
2739 run a read filter, or display filter, or we're going to process taps, set up to
2740 do a dissection and do so. */
2741 if (do_dissection) {
2742 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2743 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2744 /* Grab any resolved addresses */
2745 host_name_lookup_process();
2747 /* If we're going to be applying a filter, we'll need to
2748 create a protocol tree against which to apply the filter. */
2750 create_proto_tree = TRUE;
2752 /* We're not going to display the protocol tree on this pass,
2753 so it's not going to be "visible". */
2754 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2756 /* If we're running a read filter, prime the epan_dissect_t with that
2759 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2761 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2763 if (ref == &fdlocal) {
2764 ref_frame = fdlocal;
2768 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2770 /* Run the read filter if we have one. */
2772 passed = dfilter_apply_edt(cf->rfcode, &edt);
2776 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2777 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2779 /* If we're not doing dissection then there won't be any dependent frames.
2780 * More importantly, edt.pi.dependent_frames won't be initialized because
2781 * epan hasn't been initialized.
2783 if (do_dissection) {
2784 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2789 /* if we don't add it to the frame_data_sequence, clean it up right now
2791 frame_data_destroy(&fdlocal);
2795 epan_dissect_cleanup(&edt);
2801 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2802 struct wtap_pkthdr *phdr, Buffer *buf,
2803 gboolean filtering_tap_listeners, guint tap_flags)
2805 gboolean create_proto_tree;
2810 /* If we're not running a display filter and we're not printing any
2811 packet information, we don't need to do a dissection. This means
2812 that all packets can be marked as 'passed'. */
2815 /* If we're going to print packet information, or we're going to
2816 run a read filter, or we're going to process taps, set up to
2817 do a dissection and do so. */
2818 if (do_dissection) {
2819 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2820 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2821 /* Grab any resolved addresses */
2822 host_name_lookup_process();
2824 if (cf->dfcode || print_details || filtering_tap_listeners ||
2825 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2826 create_proto_tree = TRUE;
2828 create_proto_tree = FALSE;
2830 /* The protocol tree will be "visible", i.e., printed, only if we're
2831 printing packet details, which is true if we're printing stuff
2832 ("print_packet_info" is true) and we're in verbose mode
2833 ("packet_details" is true). */
2834 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2836 /* If we're running a display filter, prime the epan_dissect_t with that
2839 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2841 col_custom_prime_edt(&edt, &cf->cinfo);
2843 /* We only need the columns if either
2844 1) some tap needs the columns
2846 2) we're printing packet info but we're *not* verbose; in verbose
2847 mode, we print the protocol tree, not the protocol summary.
2849 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2854 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2861 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2863 /* Run the read/display filter if we have one. */
2865 passed = dfilter_apply_edt(cf->dfcode, &edt);
2869 frame_data_set_after_dissect(fdata, &cum_bytes);
2870 /* Process this packet. */
2871 if (print_packet_info) {
2872 /* We're printing packet information; print the information for
2875 print_packet(cf, &edt);
2877 print_packet(cf, NULL);
2879 /* The ANSI C standard does not appear to *require* that a line-buffered
2880 stream be flushed to the host environment whenever a newline is
2881 written, it just says that, on such a stream, characters "are
2882 intended to be transmitted to or from the host environment as a
2883 block when a new-line character is encountered".
2885 The Visual C++ 6.0 C implementation doesn't do what is intended;
2886 even if you set a stream to be line-buffered, it still doesn't
2887 flush the buffer at the end of every line.
2889 So, if the "-l" flag was specified, we flush the standard output
2890 at the end of a packet. This will do the right thing if we're
2891 printing packet summary lines, and, as we print the entire protocol
2892 tree for a single packet without waiting for anything to happen,
2893 it should be as good as line-buffered mode if we're printing
2894 protocol trees. (The whole reason for the "-l" flag in either
2895 tcpdump or TShark is to allow the output of a live capture to
2896 be piped to a program or script and to have that script see the
2897 information for the packet as soon as it's printed, rather than
2898 having to wait until a standard I/O buffer fills up. */
2902 if (ferror(stdout)) {
2903 show_print_file_io_error(errno);
2911 if (do_dissection) {
2912 epan_dissect_cleanup(&edt);
2914 return passed || fdata->flags.dependent_of_displayed;
2918 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2919 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2922 int snapshot_length;
2926 gchar *err_info = NULL;
2928 char *save_file_string = NULL;
2929 gboolean filtering_tap_listeners;
2931 wtapng_section_t *shb_hdr;
2932 wtapng_iface_descriptions_t *idb_inf;
2936 shb_hdr = wtap_file_get_shb_info(cf->wth);
2937 idb_inf = wtap_file_get_idb_info(cf->wth);
2938 #ifdef PCAP_NG_DEFAULT
2939 if (idb_inf->number_of_interfaces > 1) {
2940 linktype = WTAP_ENCAP_PER_PACKET;
2942 linktype = wtap_file_encap(cf->wth);
2945 linktype = wtap_file_encap(cf->wth);
2947 if (save_file != NULL) {
2948 /* Get a string that describes what we're writing to */
2949 save_file_string = output_file_description(save_file);
2951 /* Set up to write to the capture file. */
2952 snapshot_length = wtap_snapshot_length(cf->wth);
2953 if (snapshot_length == 0) {
2954 /* Snapshot length of input file not known. */
2955 snapshot_length = WTAP_MAX_PACKET_SIZE;
2957 /* If we don't have an application name add Tshark */
2958 if (shb_hdr->shb_user_appl == NULL) {
2959 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2960 shb_hdr->shb_user_appl = appname;
2963 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2964 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2965 snapshot_length, FALSE /* compressed */, &err);
2967 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2968 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2974 /* We couldn't set up to write to the capture file. */
2977 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2978 cmdarg_err("Capture files can't be written in that format.");
2981 case WTAP_ERR_UNSUPPORTED_ENCAP:
2982 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2983 cmdarg_err("The capture file being read can't be written as a "
2984 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2987 case WTAP_ERR_CANT_OPEN:
2988 cmdarg_err("The %s couldn't be created for some "
2989 "unknown reason.", save_file_string);
2992 case WTAP_ERR_SHORT_WRITE:
2993 cmdarg_err("A full header couldn't be written to the %s.",
2998 cmdarg_err("The %s could not be created: %s.", save_file_string,
2999 wtap_strerror(err));
3005 if (print_packet_info) {
3006 if (!write_preamble(cf)) {
3008 show_print_file_io_error(err);
3015 if (pdh && out_file_name_res) {
3016 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
3017 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
3018 wtap_file_type_short_string(out_file_type));
3022 /* Do we have any tap listeners with filters? */
3023 filtering_tap_listeners = have_filtering_tap_listeners();
3025 /* Get the union of the flags for all tap listeners. */
3026 tap_flags = union_of_tap_listener_flags();
3028 if (perform_two_pass_analysis) {
3030 int old_max_packet_count = max_packet_count;
3032 /* Allocate a frame_data_sequence for all the frames. */
3033 cf->frames = new_frame_data_sequence();
3035 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3036 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3037 wtap_buf_ptr(cf->wth))) {
3038 /* Stop reading if we have the maximum number of packets;
3039 * When the -c option has not been used, max_packet_count
3040 * starts at 0, which practically means, never stop reading.
3041 * (unless we roll over max_packet_count ?)
3043 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3044 err = 0; /* This is not an error */
3050 /* Close the sequential I/O side, to free up memory it requires. */
3051 wtap_sequential_close(cf->wth);
3053 /* Allow the protocol dissectors to free up memory that they
3054 * don't need after the sequential run-through of the packets. */
3055 postseq_cleanup_all_protocols();
3057 max_packet_count = old_max_packet_count;
3061 buffer_init(&buf, 1500);
3062 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3063 fdata = frame_data_sequence_find(cf->frames, framenum);
3064 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3065 &buf, fdata->cap_len, &err, &err_info)) {
3066 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3067 filtering_tap_listeners, tap_flags)) {
3068 /* Either there's no read filtering or this packet passed the
3069 filter, so, if we're writing to a capture file, write
3072 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3073 /* Error writing to a capture file */
3076 case WTAP_ERR_UNSUPPORTED_ENCAP:
3078 * This is a problem with the particular frame we're writing;
3079 * note that, and give the frame number.
3081 * XXX - framenum is not necessarily the frame number in
3082 * the input file if there was a read filter.
3085 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3086 framenum, cf->filename,
3087 wtap_file_type_short_string(out_file_type));
3091 show_capture_file_io_error(save_file, err, FALSE);
3094 wtap_dump_close(pdh, &err);
3099 /* Stop reading if we have the maximum number of packets;
3100 * When the -c option has not been used, max_packet_count
3101 * starts at 0, which practically means, never stop reading.
3102 * (unless we roll over max_packet_count ?)
3104 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3105 err = 0; /* This is not an error */
3115 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3118 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3119 wtap_buf_ptr(cf->wth),
3120 filtering_tap_listeners, tap_flags)) {
3121 /* Either there's no read filtering or this packet passed the
3122 filter, so, if we're writing to a capture file, write
3125 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3126 /* Error writing to a capture file */
3129 case WTAP_ERR_UNSUPPORTED_ENCAP:
3131 * This is a problem with the particular frame we're writing;
3132 * note that, and give the frame number.
3135 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3136 framenum, cf->filename,
3137 wtap_file_type_short_string(out_file_type));
3141 show_capture_file_io_error(save_file, err, FALSE);
3144 wtap_dump_close(pdh, &err);
3149 /* Stop reading if we have the maximum number of packets;
3150 * When the -c option has not been used, max_packet_count
3151 * starts at 0, which practically means, never stop reading.
3152 * (unless we roll over max_packet_count ?)
3154 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3155 err = 0; /* This is not an error */
3164 * Print a message noting that the read failed somewhere along the line.
3166 * If we're printing packet data, and the standard output and error are
3167 * going to the same place, flush the standard output, so everything
3168 * buffered up is written, and then print a newline to the standard error
3169 * before printing the error message, to separate it from the packet
3170 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3171 * the _fstat() documentation at Microsoft doesn't indicate whether
3172 * st_ino is even supported.)
3175 if (print_packet_info) {
3176 struct stat stat_stdout, stat_stderr;
3178 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3179 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3180 stat_stdout.st_ino == stat_stderr.st_ino) {
3182 fprintf(stderr, "\n");
3189 case WTAP_ERR_UNSUPPORTED:
3190 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3191 cf->filename, err_info);
3195 case WTAP_ERR_UNSUPPORTED_ENCAP:
3196 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3197 cf->filename, err_info);
3201 case WTAP_ERR_CANT_READ:
3202 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3206 case WTAP_ERR_SHORT_READ:
3207 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3211 case WTAP_ERR_BAD_FILE:
3212 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3213 cf->filename, err_info);
3217 case WTAP_ERR_DECOMPRESS:
3218 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3219 "(%s)", cf->filename, err_info);
3223 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3224 cf->filename, wtap_strerror(err));
3227 if (save_file != NULL) {
3228 /* Now close the capture file. */
3229 if (!wtap_dump_close(pdh, &err))
3230 show_capture_file_io_error(save_file, err, TRUE);
3233 if (save_file != NULL) {
3234 /* Now close the capture file. */
3235 if (!wtap_dump_close(pdh, &err))
3236 show_capture_file_io_error(save_file, err, TRUE);
3238 if (print_packet_info) {
3239 if (!write_finale()) {
3241 show_print_file_io_error(err);
3248 wtap_close(cf->wth);
3251 g_free(save_file_string);
3258 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3260 gboolean filtering_tap_listeners, guint tap_flags)
3263 gboolean create_proto_tree;
3268 /* Count this packet. */
3271 /* If we're not running a display filter and we're not printing any
3272 packet information, we don't need to do a dissection. This means
3273 that all packets can be marked as 'passed'. */
3276 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3278 /* If we're going to print packet information, or we're going to
3279 run a read filter, or we're going to process taps, set up to
3280 do a dissection and do so. */
3281 if (do_dissection) {
3282 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3283 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3284 /* Grab any resolved addresses */
3285 host_name_lookup_process();
3287 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3288 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3289 create_proto_tree = TRUE;
3291 create_proto_tree = FALSE;
3293 /* The protocol tree will be "visible", i.e., printed, only if we're
3294 printing packet details, which is true if we're printing stuff
3295 ("print_packet_info" is true) and we're in verbose mode
3296 ("packet_details" is true). */
3297 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3299 /* If we're running a filter, prime the epan_dissect_t with that
3302 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3304 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3306 col_custom_prime_edt(&edt, &cf->cinfo);
3308 /* We only need the columns if either
3309 1) some tap needs the columns
3311 2) we're printing packet info but we're *not* verbose; in verbose
3312 mode, we print the protocol tree, not the protocol summary.
3314 3) there is a column mapped as an individual field */
3315 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3320 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3322 if (ref == &fdata) {
3327 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3329 /* Run the filters if we have them. */
3331 passed = dfilter_apply_edt(cf->rfcode, &edt);
3332 if (passed && cf->dfcode)
3333 passed = dfilter_apply_edt(cf->dfcode, &edt);
3337 frame_data_set_after_dissect(&fdata, &cum_bytes);
3339 /* Process this packet. */
3340 if (print_packet_info) {
3341 /* We're printing packet information; print the information for
3344 print_packet(cf, &edt);
3346 print_packet(cf, NULL);
3348 /* The ANSI C standard does not appear to *require* that a line-buffered
3349 stream be flushed to the host environment whenever a newline is
3350 written, it just says that, on such a stream, characters "are
3351 intended to be transmitted to or from the host environment as a
3352 block when a new-line character is encountered".
3354 The Visual C++ 6.0 C implementation doesn't do what is intended;
3355 even if you set a stream to be line-buffered, it still doesn't
3356 flush the buffer at the end of every line.
3358 So, if the "-l" flag was specified, we flush the standard output
3359 at the end of a packet. This will do the right thing if we're
3360 printing packet summary lines, and, as we print the entire protocol
3361 tree for a single packet without waiting for anything to happen,
3362 it should be as good as line-buffered mode if we're printing
3363 protocol trees. (The whole reason for the "-l" flag in either
3364 tcpdump or TShark is to allow the output of a live capture to
3365 be piped to a program or script and to have that script see the
3366 information for the packet as soon as it's printed, rather than
3367 having to wait until a standard I/O buffer fills up. */
3371 if (ferror(stdout)) {
3372 show_print_file_io_error(errno);
3377 /* this must be set after print_packet() [bug #8160] */
3378 prev_dis_frame = fdata;
3379 prev_dis = &prev_dis_frame;
3382 prev_cap_frame = fdata;
3383 prev_cap = &prev_cap_frame;
3385 if (do_dissection) {
3386 epan_dissect_cleanup(&edt);
3387 frame_data_destroy(&fdata);
3393 write_preamble(capture_file *cf)
3395 switch (output_action) {
3398 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3402 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3404 write_psml_preamble(stdout);
3405 return !ferror(stdout);
3408 write_fields_preamble(output_fields, stdout);
3409 return !ferror(stdout);
3412 g_assert_not_reached();
3418 get_line_buf(size_t len)
3420 static char *line_bufp = NULL;
3421 static size_t line_buf_len = 256;
3422 size_t new_line_buf_len;
3424 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3425 new_line_buf_len *= 2)
3427 if (line_bufp == NULL) {
3428 line_buf_len = new_line_buf_len;
3429 line_bufp = (char *)g_malloc(line_buf_len + 1);
3431 if (new_line_buf_len > line_buf_len) {
3432 line_buf_len = new_line_buf_len;
3433 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3440 print_columns(capture_file *cf)
3447 line_bufp = get_line_buf(256);
3450 for (i = 0; i < cf->cinfo.num_cols; i++) {
3451 /* Skip columns not marked as visible. */
3452 if (!get_column_visible(i))
3454 switch (cf->cinfo.col_fmt[i]) {
3458 * Don't print this if we're doing a live capture from a network
3459 * interface - if we're doing a live capture, you won't be
3460 * able to look at the capture in the future (it's not being
3461 * saved anywhere), so the frame numbers are unlikely to be
3464 * (XXX - it might be nice to be able to save and print at
3465 * the same time, sort of like an "Update list of packets
3466 * in real time" capture in Wireshark.)
3468 if (global_capture_opts.ifaces->len > 0)
3471 column_len = strlen(cf->cinfo.col_data[i]);
3474 line_bufp = get_line_buf(buf_offset + column_len);
3475 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3481 case COL_ABS_DATE_TIME:
3483 case COL_UTC_DATE_TIME: /* XXX - wider */
3484 column_len = strlen(cf->cinfo.col_data[i]);
3485 if (column_len < 10)
3487 line_bufp = get_line_buf(buf_offset + column_len);
3488 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3494 case COL_DEF_DL_SRC:
3495 case COL_RES_DL_SRC:
3496 case COL_UNRES_DL_SRC:
3497 case COL_DEF_NET_SRC:
3498 case COL_RES_NET_SRC:
3499 case COL_UNRES_NET_SRC:
3500 column_len = strlen(cf->cinfo.col_data[i]);
3501 if (column_len < 12)
3503 line_bufp = get_line_buf(buf_offset + column_len);
3504 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3510 case COL_DEF_DL_DST:
3511 case COL_RES_DL_DST:
3512 case COL_UNRES_DL_DST:
3513 case COL_DEF_NET_DST:
3514 case COL_RES_NET_DST:
3515 case COL_UNRES_NET_DST:
3516 column_len = strlen(cf->cinfo.col_data[i]);
3517 if (column_len < 12)
3519 line_bufp = get_line_buf(buf_offset + column_len);
3520 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3524 column_len = strlen(cf->cinfo.col_data[i]);
3525 line_bufp = get_line_buf(buf_offset + column_len);
3526 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3529 buf_offset += column_len;
3530 if (i != cf->cinfo.num_cols - 1) {
3532 * This isn't the last column, so we need to print a
3533 * separator between this column and the next.
3535 * If we printed a network source and are printing a
3536 * network destination of the same type next, separate
3537 * them with " -> "; if we printed a network destination
3538 * and are printing a network source of the same type
3539 * next, separate them with " <- "; otherwise separate them
3542 * We add enough space to the buffer for " <- " or " -> ",
3543 * even if we're only adding " ".
3545 line_bufp = get_line_buf(buf_offset + 4);
3546 switch (cf->cinfo.col_fmt[i]) {
3551 switch (cf->cinfo.col_fmt[i + 1]) {
3556 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3561 g_strlcat(line_bufp + buf_offset, " ", 5);
3567 case COL_DEF_DL_SRC:
3568 case COL_RES_DL_SRC:
3569 case COL_UNRES_DL_SRC:
3570 switch (cf->cinfo.col_fmt[i + 1]) {
3572 case COL_DEF_DL_DST:
3573 case COL_RES_DL_DST:
3574 case COL_UNRES_DL_DST:
3575 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3580 g_strlcat(line_bufp + buf_offset, " ", 5);
3586 case COL_DEF_NET_SRC:
3587 case COL_RES_NET_SRC:
3588 case COL_UNRES_NET_SRC:
3589 switch (cf->cinfo.col_fmt[i + 1]) {
3591 case COL_DEF_NET_DST:
3592 case COL_RES_NET_DST:
3593 case COL_UNRES_NET_DST:
3594 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3599 g_strlcat(line_bufp + buf_offset, " ", 5);
3608 switch (cf->cinfo.col_fmt[i + 1]) {
3613 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3618 g_strlcat(line_bufp + buf_offset, " ", 5);
3624 case COL_DEF_DL_DST:
3625 case COL_RES_DL_DST:
3626 case COL_UNRES_DL_DST:
3627 switch (cf->cinfo.col_fmt[i + 1]) {
3629 case COL_DEF_DL_SRC:
3630 case COL_RES_DL_SRC:
3631 case COL_UNRES_DL_SRC:
3632 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3637 g_strlcat(line_bufp + buf_offset, " ", 5);
3643 case COL_DEF_NET_DST:
3644 case COL_RES_NET_DST:
3645 case COL_UNRES_NET_DST:
3646 switch (cf->cinfo.col_fmt[i + 1]) {
3648 case COL_DEF_NET_SRC:
3649 case COL_RES_NET_SRC:
3650 case COL_UNRES_NET_SRC:
3651 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3656 g_strlcat(line_bufp + buf_offset, " ", 5);
3663 g_strlcat(line_bufp + buf_offset, " ", 5);
3669 return print_line(print_stream, 0, line_bufp);
3673 print_packet(capture_file *cf, epan_dissect_t *edt)
3675 print_args_t print_args;
3677 if (print_summary || output_fields_has_cols(output_fields)) {
3678 /* Just fill in the columns. */
3679 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3681 if (print_summary) {
3682 /* Now print them. */
3683 switch (output_action) {
3686 if (!print_columns(cf))
3691 proto_tree_write_psml(edt, stdout);
3692 return !ferror(stdout);
3693 case WRITE_FIELDS: /*No non-verbose "fields" format */
3694 g_assert_not_reached();
3699 if (print_details) {
3700 /* Print the information in the protocol tree. */
3701 switch (output_action) {
3704 /* Only initialize the fields that are actually used in proto_tree_print.
3705 * This is particularly important for .range, as that's heap memory which
3706 * we would otherwise have to g_free().
3707 print_args.to_file = TRUE;
3708 print_args.format = print_format;
3709 print_args.print_summary = print_summary;
3710 print_args.print_formfeed = FALSE;
3711 packet_range_init(&print_args.range, &cfile);
3713 print_args.print_hex = print_hex;
3714 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3716 if (!proto_tree_print(&print_args, edt, print_stream))
3719 if (!print_line(print_stream, 0, separator))
3725 proto_tree_write_pdml(edt, stdout);
3727 return !ferror(stdout);
3729 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3731 return !ferror(stdout);
3735 if (print_summary || print_details) {
3736 if (!print_line(print_stream, 0, ""))
3739 if (!print_hex_data(print_stream, edt))
3741 if (!print_line(print_stream, 0, separator))
3750 switch (output_action) {
3753 return print_finale(print_stream);
3757 write_pdml_finale(stdout);
3759 write_psml_finale(stdout);
3760 return !ferror(stdout);
3763 write_fields_finale(output_fields, stdout);
3764 return !ferror(stdout);
3767 g_assert_not_reached();
3773 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3777 char err_msg[2048+1];
3779 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3783 /* The open succeeded. Fill in the information for this file. */
3785 /* Create new epan session for dissection. */
3786 epan_free(cf->epan);
3787 cf->epan = tshark_epan_new(cf);
3790 cf->f_datalen = 0; /* not used, but set it anyway */
3792 /* Set the file name because we need it to set the follow stream filter.
3793 XXX - is that still true? We need it for other reasons, though,
3795 cf->filename = g_strdup(fname);
3797 /* Indicate whether it's a permanent or temporary file. */
3798 cf->is_tempfile = is_tempfile;
3800 /* No user changes yet. */
3801 cf->unsaved_changes = FALSE;
3803 cf->cd_t = wtap_file_type(cf->wth);
3805 cf->drops_known = FALSE;
3807 cf->snap = wtap_snapshot_length(cf->wth);
3808 if (cf->snap == 0) {
3809 /* Snapshot length not known. */
3810 cf->has_snap = FALSE;
3811 cf->snap = WTAP_MAX_PACKET_SIZE;
3813 cf->has_snap = TRUE;
3814 nstime_set_zero(&cf->elapsed_time);
3819 cf->state = FILE_READ_IN_PROGRESS;
3821 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3822 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3827 g_snprintf(err_msg, sizeof err_msg,
3828 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3829 cmdarg_err("%s", err_msg);
3834 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3836 char *save_file_string;
3838 save_file_string = output_file_description(fname);
3843 cmdarg_err("Not all the packets could be written to the %s because there is "
3844 "no space left on the file system.",
3850 cmdarg_err("Not all the packets could be written to the %s because you are "
3851 "too close to, or over your disk quota.",
3856 case WTAP_ERR_CANT_CLOSE:
3857 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3861 case WTAP_ERR_SHORT_WRITE:
3862 cmdarg_err("Not all the packets could be written to the %s.",
3868 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3869 wtap_strerror(err));
3871 cmdarg_err("An error occurred while writing to the %s: %s.",
3872 save_file_string, wtap_strerror(err));
3876 g_free(save_file_string);
3880 show_print_file_io_error(int err)
3885 cmdarg_err("Not all the packets could be printed because there is "
3886 "no space left on the file system.");
3891 cmdarg_err("Not all the packets could be printed because you are "
3892 "too close to, or over your disk quota.");
3897 cmdarg_err("An error occurred while printing packets: %s.",
3904 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3908 static char errmsg_errno[1024+1];
3911 /* Wiretap error. */
3914 case WTAP_ERR_NOT_REGULAR_FILE:
3915 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3918 case WTAP_ERR_RANDOM_OPEN_PIPE:
3919 /* Seen only when opening a capture file for reading. */
3920 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3923 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3924 /* Seen only when opening a capture file for reading. */
3925 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3928 case WTAP_ERR_UNSUPPORTED:
3929 /* Seen only when opening a capture file for reading. */
3930 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3931 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3934 errmsg = errmsg_errno;
3937 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3938 /* Seen only when opening a capture file for writing. */
3939 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3940 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3941 "written to a pipe.", wtap_file_type_short_string(file_type));
3942 errmsg = errmsg_errno;
3945 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3946 /* Seen only when opening a capture file for writing. */
3947 errmsg = "TShark doesn't support writing capture files in that format.";
3950 case WTAP_ERR_UNSUPPORTED_ENCAP:
3952 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3953 "TShark can't save this capture as a \"%s\" file.",
3954 wtap_file_type_short_string(file_type));
3956 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3957 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3961 errmsg = errmsg_errno;
3964 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3966 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3967 "TShark can't save this capture as a \"%s\" file.",
3968 wtap_file_type_short_string(file_type));
3969 errmsg = errmsg_errno;
3971 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3974 case WTAP_ERR_BAD_FILE:
3975 /* Seen only when opening a capture file for reading. */
3976 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3977 "The file \"%%s\" appears to be damaged or corrupt.\n"
3980 errmsg = errmsg_errno;
3983 case WTAP_ERR_CANT_OPEN:
3985 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3987 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3990 case WTAP_ERR_SHORT_READ:
3991 errmsg = "The file \"%s\" appears to have been cut short"
3992 " in the middle of a packet or other data.";
3995 case WTAP_ERR_SHORT_WRITE:
3996 errmsg = "A full header couldn't be written to the file \"%s\".";
3999 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
4000 errmsg = "This file type cannot be written as a compressed file.";
4003 case WTAP_ERR_DECOMPRESS:
4004 /* Seen only when opening a capture file for reading. */
4005 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4006 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
4009 errmsg = errmsg_errno;
4013 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
4014 "The file \"%%s\" could not be %s: %s.",
4015 for_writing ? "created" : "opened",
4016 wtap_strerror(err));
4017 errmsg = errmsg_errno;
4021 errmsg = file_open_error_message(err, for_writing);
4026 * Open/create errors are reported with an console message in TShark.
4029 open_failure_message(const char *filename, int err, gboolean for_writing)
4031 fprintf(stderr, "tshark: ");
4032 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4033 fprintf(stderr, "\n");
4038 * General errors are reported with an console message in TShark.
4041 failure_message(const char *msg_format, va_list ap)
4043 fprintf(stderr, "tshark: ");
4044 vfprintf(stderr, msg_format, ap);
4045 fprintf(stderr, "\n");
4049 * Read errors are reported with an console message in TShark.
4052 read_failure_message(const char *filename, int err)
4054 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4055 filename, g_strerror(err));
4059 * Write errors are reported with an console message in TShark.
4062 write_failure_message(const char *filename, int err)
4064 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4065 filename, g_strerror(err));
4069 * Report an error in command-line arguments.
4072 cmdarg_err(const char *fmt, ...)
4077 failure_message(fmt, ap);
4082 * Report additional information for an error in command-line arguments.
4085 cmdarg_err_cont(const char *fmt, ...)
4090 vfprintf(stderr, fmt, ap);
4091 fprintf(stderr, "\n");
4097 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4102 * indent-tabs-mode: nil
4105 * vi: set shiftwidth=2 tabstop=8 expandtab:
4106 * :indentSize=2:tabSize=8:noTabs=true: