3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
48 #ifdef HAVE_SYS_STAT_H
49 # include <sys/stat.h>
53 #include "wsutil/wsgetopt.h"
57 #include <epan/epan.h>
58 #include <epan/filesystem.h>
59 #include <wsutil/crash_info.h>
60 #include <wsutil/privileges.h>
61 #include <wsutil/file_util.h>
64 #include <epan/timestamp.h>
65 #include <epan/packet.h>
67 #include "disabled_protos.h"
68 #include <epan/prefs.h>
69 #include <epan/column.h>
71 #include <epan/addr_resolv.h>
73 #include "clopts_common.h"
74 #include "cmdarg_err.h"
75 #include "version_info.h"
76 #include <epan/plugins.h>
78 #include <epan/epan_dissect.h>
80 #include <epan/stat_cmd_args.h>
81 #include <epan/timestamp.h>
82 #include <epan/ex-opt.h>
85 #include "capture_ui_utils.h"
86 #include "capture_ifinfo.h"
87 #include "capture-pcap-util.h"
89 #include "capture-wpcap.h"
90 #include <wsutil/unicode-utils.h>
92 #include "capture_session.h"
93 #include "capture_sync.h"
94 #include "capture_opts.h"
95 #endif /* HAVE_LIBPCAP */
97 #include <epan/funnel.h>
100 * This is the template for the decode as option; it is shared between the
101 * various functions that output the usage for this parameter.
103 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
105 static guint32 cum_bytes;
106 static nstime_t first_ts;
107 static frame_data *prev_dis;
108 static frame_data prev_dis_frame;
109 static frame_data *prev_cap;
110 static frame_data prev_cap_frame;
112 static const char* prev_display_dissector_name = NULL;
114 static gboolean perform_two_pass_analysis;
117 * The way the packet decode is to be written.
120 WRITE_TEXT, /* summary or detail text */
121 WRITE_XML, /* PDML or PSML */
122 WRITE_FIELDS /* User defined list of fields */
123 /* Add CSV and the like here */
126 static output_action_e output_action;
127 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
128 static gboolean print_packet_info; /* TRUE if we're to print packet information */
129 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
130 static gboolean print_details; /* TRUE if we're to print packet details information */
131 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
132 static gboolean line_buffered;
133 static gboolean really_quiet = FALSE;
135 static print_format_e print_format = PR_FMT_TEXT;
136 static print_stream_t *print_stream;
138 static output_fields_t* output_fields = NULL;
140 /* The line separator used between packets, changeable via the -S option */
141 static const char *separator = "";
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts = TRUE;
149 static capture_options global_capture_opts;
150 static capture_session global_capture_session;
153 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
154 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
157 static gboolean capture(void);
158 static void report_counts(void);
160 static BOOL WINAPI capture_cleanup(DWORD);
162 static void capture_cleanup(int);
164 static void report_counts_siginfo(int);
167 #endif /* HAVE_LIBPCAP */
169 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
170 static gboolean process_packet(capture_file *cf, gint64 offset,
171 struct wtap_pkthdr *whdr, const guchar *pd,
172 gboolean filtering_tap_listeners, guint tap_flags);
173 static void show_capture_file_io_error(const char *, int, gboolean);
174 static void show_print_file_io_error(int err);
175 static gboolean write_preamble(capture_file *cf);
176 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
177 static gboolean write_finale(void);
178 static const char *cf_open_error_message(int err, gchar *err_info,
179 gboolean for_writing, int file_type);
181 static void open_failure_message(const char *filename, int err,
182 gboolean for_writing);
183 static void failure_message(const char *msg_format, va_list ap);
184 static void read_failure_message(const char *filename, int err);
185 static void write_failure_message(const char *filename, int err);
190 const char *sstr; /* The short string */
191 const char *lstr; /* The long string */
195 string_compare(gconstpointer a, gconstpointer b)
197 return strcmp(((const struct string_elem *)a)->sstr,
198 ((const struct string_elem *)b)->sstr);
202 string_elem_print(gpointer data, gpointer not_used _U_)
204 fprintf(stderr, " %s - %s\n",
205 ((struct string_elem *)data)->sstr,
206 ((struct string_elem *)data)->lstr);
210 list_capture_types(void) {
212 struct string_elem *captypes;
215 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
217 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
218 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
219 if (wtap_dump_can_open(i)) {
220 captypes[i].sstr = wtap_file_type_short_string(i);
221 captypes[i].lstr = wtap_file_type_string(i);
222 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
225 g_slist_foreach(list, string_elem_print, NULL);
231 print_usage(gboolean print_ver)
238 "TShark " VERSION "%s\n"
239 "Dump and analyze network traffic.\n"
240 "See http://www.wireshark.org for more information.\n"
243 wireshark_svnversion, get_copyright_info());
247 fprintf(output, "\n");
248 fprintf(output, "Usage: tshark [options] ...\n");
249 fprintf(output, "\n");
252 fprintf(output, "Capture interface:\n");
253 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
254 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
255 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
256 fprintf(output, " -p don't capture in promiscuous mode\n");
257 #ifdef HAVE_PCAP_CREATE
258 fprintf(output, " -I capture in monitor mode, if available\n");
260 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
261 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
263 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
264 fprintf(output, " -D print list of interfaces and exit\n");
265 fprintf(output, " -L print list of link-layer types of iface and exit\n");
266 fprintf(output, "\n");
267 fprintf(output, "Capture stop conditions:\n");
268 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
269 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
270 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
271 fprintf(output, " files:NUM - stop after NUM files\n");
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Capture output:\n");
274 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
275 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
276 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
277 #endif /* HAVE_LIBPCAP */
278 #ifdef HAVE_PCAP_REMOTE
279 fprintf(output, "RPCAP options:\n");
280 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
282 /*fprintf(output, "\n");*/
283 fprintf(output, "Input file:\n");
284 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
286 fprintf(output, "\n");
287 fprintf(output, "Processing:\n");
288 fprintf(output, " -2 perform a two-pass analysis\n");
289 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
290 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
291 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
292 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
293 fprintf(output, " -d %s ...\n", decode_as_arg_template);
294 fprintf(output, " \"Decode As\", see the man page for details\n");
295 fprintf(output, " Example: tcp.port==8888,http\n");
296 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
297 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
299 /*fprintf(output, "\n");*/
300 fprintf(output, "Output:\n");
301 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
302 fprintf(output, " (or to the standard output for \"-\")\n");
303 fprintf(output, " -C <config profile> start with specified configuration profile\n");
304 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
305 fprintf(output, " an empty \"-F\" option will list the file types\n");
306 fprintf(output, " -V add output of packet tree (Packet Details)\n");
307 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
308 fprintf(output, " separated\n");
309 fprintf(output, " -P print packet summary even when writing to a file\n");
310 fprintf(output, " -S <separator> the line separator to print between packets\n");
311 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
312 fprintf(output, " -T pdml|ps|psml|text|fields\n");
313 fprintf(output, " format of text output (def: text)\n");
314 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
315 fprintf(output, " this option can be repeated to print multiple fields\n");
316 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
317 fprintf(output, " header=y|n switch headers on and off\n");
318 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
319 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
320 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
321 fprintf(output, " aggregator\n");
322 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
323 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
324 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
325 fprintf(output, " -l flush standard output after each packet\n");
326 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
327 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
328 fprintf(output, " -g enable group read access on the output file(s)\n");
329 fprintf(output, " -W n Save extra information in the file, if supported.\n");
330 fprintf(output, " n = write network address resolution information\n");
331 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
332 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
334 fprintf(output, "\n");
335 fprintf(output, "Miscellaneous:\n");
336 fprintf(output, " -h display this help and exit\n");
337 fprintf(output, " -v display version info and exit\n");
338 fprintf(output, " -o <name>:<value> ... override preference setting\n");
339 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
340 fprintf(output, " -G [report] dump one of several available reports and exit\n");
341 fprintf(output, " default report=\"fields\"\n");
342 fprintf(output, " use \"-G ?\" for more help\n");
346 glossary_option_help(void)
352 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
354 fprintf(output, "\n");
355 fprintf(output, "Usage: tshark -G [report]\n");
356 fprintf(output, "\n");
357 fprintf(output, "Glossary table reports:\n");
358 fprintf(output, " -G fields dump fields glossary and exit\n");
359 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
360 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
361 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
362 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
363 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
364 fprintf(output, "\n");
365 fprintf(output, "Preference reports:\n");
366 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
367 fprintf(output, " -G currentprefs dump current preferences and exit\n");
368 fprintf(output, "\n");
372 * For a dissector table, print on the stream described by output,
373 * its short name (which is what's used in the "-d" option) and its
377 display_dissector_table_names(const char *table_name, const char *ui_name,
380 if ((prev_display_dissector_name == NULL) ||
381 (strcmp(prev_display_dissector_name, table_name) != 0)) {
382 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
383 prev_display_dissector_name = table_name;
388 * For a dissector handle, print on the stream described by output,
389 * the filter name (which is what's used in the "-d" option) and the full
390 * name for the protocol that corresponds to this handle.
393 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
396 const gchar *proto_filter_name;
397 const gchar *proto_ui_name;
399 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
401 if (proto_id != -1) {
402 proto_filter_name = proto_get_protocol_filter_name(proto_id);
403 proto_ui_name = proto_get_protocol_name(proto_id);
404 g_assert(proto_filter_name != NULL);
405 g_assert(proto_ui_name != NULL);
407 if ((prev_display_dissector_name == NULL) ||
408 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
409 fprintf((FILE *)output, "\t%s (%s)\n",
412 prev_display_dissector_name = proto_filter_name;
418 * The protocol_name_search structure is used by find_protocol_name_func()
419 * to pass parameters and store results
421 struct protocol_name_search{
422 gchar *searched_name; /* Protocol filter name we are looking for */
423 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
424 guint nb_match; /* How many dissectors matched searched_name */
426 typedef struct protocol_name_search *protocol_name_search_t;
429 * This function parses all dissectors associated with a table to find the
430 * one whose protocol has the specified filter name. It is called
431 * as a reference function in a call to dissector_table_foreach_handle.
432 * The name we are looking for, as well as the results, are stored in the
433 * protocol_name_search struct pointed to by user_data.
434 * If called using dissector_table_foreach_handle, we actually parse the
435 * whole list of dissectors.
438 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
442 const gchar *protocol_filter_name;
443 protocol_name_search_t search_info;
447 search_info = (protocol_name_search_t)user_data;
449 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
450 if (proto_id != -1) {
451 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
452 g_assert(protocol_filter_name != NULL);
453 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
455 if (search_info->nb_match == 0) {
456 /* Record this handle only if this is the first match */
457 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
459 search_info->nb_match++;
465 * Allow dissector key names to be sorted alphabetically
469 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
471 return strcmp((const char*)dissector_a, (const char*)dissector_b);
475 * Print all layer type names supported.
476 * We send the output to the stream described by the handle output.
480 fprint_all_layer_types(FILE *output)
483 prev_display_dissector_name = NULL;
484 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
488 * Print all protocol names supported for a specific layer type.
489 * table_name contains the layer type name in which the search is performed.
490 * We send the output to the stream described by the handle output.
494 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
497 prev_display_dissector_name = NULL;
498 dissector_table_foreach_handle(table_name,
499 display_dissector_names,
504 * The function below parses the command-line parameters for the decode as
505 * feature (a string pointer by cl_param).
506 * It checks the format of the command-line, searches for a matching table
507 * and dissector. If a table/dissector match is not found, we display a
508 * summary of the available tables/dissectors (on stderr) and return FALSE.
509 * If everything is fine, we get the "Decode as" preference activated,
510 * then we return TRUE.
513 add_decode_as(const gchar *cl_param)
516 guint32 selector, selector2;
517 gchar *decoded_param;
518 gchar *remaining_param;
520 gchar *dissector_str;
521 dissector_handle_t dissector_matching;
522 dissector_table_t table_matching;
523 ftenum_t dissector_table_selector_type;
524 struct protocol_name_search user_protocol_name;
528 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
531 decoded_param = g_strdup(cl_param);
532 g_assert(decoded_param);
535 /* The lines below will parse this string (modifying it) to extract all
536 necessary information. Note that decoded_param is still needed since
537 strings are not copied - we just save pointers. */
539 /* This section extracts a layer type (table_name) from decoded_param */
540 table_name = decoded_param; /* Layer type string starts from beginning */
542 remaining_param = strchr(table_name, '=');
543 if (remaining_param == NULL) {
544 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
545 /* If the argument does not follow the template, carry on anyway to check
546 if the table name is at least correct. If remaining_param is NULL,
547 we'll exit anyway further down */
550 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
553 /* Remove leading and trailing spaces from the table name */
554 while ( table_name[0] == ' ' )
556 while ( table_name[strlen(table_name) - 1] == ' ' )
557 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
559 /* The following part searches a table matching with the layer type specified */
560 table_matching = NULL;
562 /* Look for the requested table */
563 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
564 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
567 table_matching = find_dissector_table(table_name);
568 if (!table_matching) {
569 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
573 if (!table_matching) {
574 /* Display a list of supported layer types to help the user, if the
575 specified layer type was not found */
576 cmdarg_err("Valid layer types are:");
577 fprint_all_layer_types(stderr);
579 if (remaining_param == NULL || !table_matching) {
580 /* Exit if the layer type was not found, or if no '=' separator was found
582 g_free(decoded_param);
586 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
587 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
590 remaining_param++; /* Move to the second '=' */
591 *remaining_param = '\0'; /* Remove the second '=' */
593 remaining_param++; /* Position after the layer type string */
595 /* This section extracts a selector value (selector_str) from decoded_param */
597 selector_str = remaining_param; /* Next part starts with the selector number */
599 remaining_param = strchr(selector_str, ',');
600 if (remaining_param == NULL) {
601 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
602 /* If the argument does not follow the template, carry on anyway to check
603 if the selector value is at least correct. If remaining_param is NULL,
604 we'll exit anyway further down */
607 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
610 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
612 switch (dissector_table_selector_type) {
618 /* The selector for this table is an unsigned number. Parse it as such.
619 There's no need to remove leading and trailing spaces from the
620 selector number string, because sscanf will do that for us. */
621 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
626 if (op != ':' && op != '-') {
627 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
628 g_free(decoded_param);
632 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
633 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
634 g_free(decoded_param);
638 else if (selector2 < selector) {
639 /* We could swap them for the user, but maybe it's better to call
640 * this out as an error in case it's not what was intended? */
641 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
642 g_free(decoded_param);
647 cmdarg_err("Invalid selector number \"%s\"", selector_str);
648 g_free(decoded_param);
655 /* The selector for this table is a string. */
659 /* There are currently no dissector tables with any types other
660 than the ones listed above. */
661 g_assert_not_reached();
664 if (remaining_param == NULL) {
665 /* Exit if no ',' separator was found (see above) */
666 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
667 fprint_all_protocols_for_layer_types(stderr, table_name);
668 g_free(decoded_param);
672 remaining_param++; /* Position after the selector number string */
674 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
676 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
678 /* Remove leading and trailing spaces from the dissector name */
679 while ( dissector_str[0] == ' ' )
681 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
682 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
684 dissector_matching = NULL;
686 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
687 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 */
688 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
691 user_protocol_name.nb_match = 0;
692 user_protocol_name.searched_name = dissector_str;
693 user_protocol_name.matched_handle = NULL;
695 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 */
697 if (user_protocol_name.nb_match != 0) {
698 dissector_matching = user_protocol_name.matched_handle;
699 if (user_protocol_name.nb_match > 1) {
700 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
704 /* OK, check whether the problem is that there isn't any such
705 protocol, or that there is but it's not specified as a protocol
706 that's valid for that dissector table.
707 Note, we don't exit here, but dissector_matching will remain NULL,
709 if (proto_get_id_by_filter_name(dissector_str) == -1) {
710 /* No such protocol */
711 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
713 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
714 dissector_str, table_name);
719 if (!dissector_matching) {
720 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
721 fprint_all_protocols_for_layer_types(stderr, table_name);
722 g_free(decoded_param);
726 /* This is the end of the code that parses the command-line options.
727 All information is now stored in the variables:
731 The above variables that are strings are still pointing to areas within
732 decoded_parm. decoded_parm thus still needs to be kept allocated in
733 until we stop needing these variables
734 decoded_param will be deallocated at each exit point of this function */
737 /* We now have a pointer to the handle for the requested dissector
738 (requested protocol) inside the variable dissector_matching */
739 switch (dissector_table_selector_type) {
745 /* The selector for this table is an unsigned number. */
747 dissector_change_uint(table_name, selector, dissector_matching);
748 } else if (op == ':') {
749 for (i = selector; i < (guint64)selector + selector2; i++) {
750 dissector_change_uint(table_name, (guint32)i, dissector_matching);
752 } else { /* op == '-' */
753 for (i = selector; i <= selector2; i++) {
754 dissector_change_uint(table_name, (guint32)i, dissector_matching);
761 /* The selector for this table is a string. */
762 dissector_change_string(table_name, selector_str, dissector_matching);
766 /* There are currently no dissector tables with any types other
767 than the ones listed above. */
768 g_assert_not_reached();
770 g_free(decoded_param); /* "Decode As" rule has been successfully added */
775 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
776 const gchar *message, gpointer user_data)
778 /* ignore log message, if log_level isn't interesting based
779 upon the console log preferences.
780 If the preferences haven't been loaded loaded yet, display the
783 The default console_log_level preference value is such that only
784 ERROR, CRITICAL and WARNING level messages are processed;
785 MESSAGE, INFO and DEBUG level messages are ignored.
787 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
788 ERROR and CRITICAL level messages so the current code is a behavioral
789 change. The current behavior is the same as in Wireshark.
791 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
792 prefs.console_log_level != 0) {
796 g_log_default_handler(log_domain, log_level, message, user_data);
801 output_file_description(const char *fname)
803 char *save_file_string;
805 /* Get a string that describes what we're writing to */
806 if (strcmp(fname, "-") == 0) {
807 /* We're writing to the standard output */
808 save_file_string = g_strdup("standard output");
810 /* We're writing to a file with the name in save_file */
811 save_file_string = g_strdup_printf("file \"%s\"", fname);
813 return save_file_string;
817 print_current_user(void) {
818 gchar *cur_user, *cur_group;
820 if (started_with_special_privs()) {
821 cur_user = get_cur_username();
822 cur_group = get_cur_groupname();
823 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
824 cur_user, cur_group);
827 if (running_with_special_privs()) {
828 fprintf(stderr, " This could be dangerous.");
830 fprintf(stderr, "\n");
835 check_capture_privs(void) {
838 /* Warn the user if npf.sys isn't loaded. */
839 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
840 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
841 "capturing or\nlisting interfaces.\n");
847 show_version(GString *comp_info_str, GString *runtime_info_str)
849 printf("TShark " VERSION "%s\n"
856 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
857 runtime_info_str->str);
861 main(int argc, char *argv[])
863 GString *comp_info_str;
864 GString *runtime_info_str;
865 char *init_progfile_dir_error;
867 gboolean arg_error = FALSE;
873 char *gpf_path, *pf_path;
874 char *gdp_path, *dp_path;
875 int gpf_open_errno, gpf_read_errno;
876 int pf_open_errno, pf_read_errno;
877 int gdp_open_errno, gdp_read_errno;
878 int dp_open_errno, dp_read_errno;
880 volatile int exit_status = 0;
882 gboolean list_link_layer_types = FALSE;
883 gboolean start_capture = FALSE;
888 gboolean capture_option_specified = FALSE;
890 gboolean quiet = FALSE;
891 #ifdef PCAP_NG_DEFAULT
892 volatile int out_file_type = WTAP_FILE_PCAPNG;
894 volatile int out_file_type = WTAP_FILE_PCAP;
896 volatile gboolean out_file_name_res = FALSE;
897 gchar *volatile cf_name = NULL;
898 gchar *rfilter = NULL;
899 gchar *dfilter = NULL;
900 #ifdef HAVE_PCAP_OPEN_DEAD
901 struct bpf_program fcode;
903 dfilter_t *rfcode = NULL;
904 dfilter_t *dfcode = NULL;
909 gchar *output_only = NULL;
911 #ifdef HAVE_PCAP_REMOTE
912 #define OPTSTRING_A "A:"
914 #define OPTSTRING_A ""
917 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
918 #define OPTSTRING_B "B:"
920 #define OPTSTRING_B ""
921 #endif /* _WIN32 or HAVE_PCAP_CREATE */
922 #else /* HAVE_LIBPCAP */
923 #define OPTSTRING_B ""
924 #endif /* HAVE_LIBPCAP */
926 #ifdef HAVE_PCAP_CREATE
927 #define OPTSTRING_I "I"
929 #define OPTSTRING_I ""
932 #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:"
934 static const char optstring[] = OPTSTRING;
936 /* Assemble the compile-time version information string */
937 comp_info_str = g_string_new("Compiled ");
938 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
940 /* Assemble the run-time version information string */
941 runtime_info_str = g_string_new("Running ");
942 get_runtime_version_info(runtime_info_str, NULL);
944 /* Add it to the information to be reported on a crash. */
945 ws_add_crash_info("TShark " VERSION "%s\n"
950 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
953 arg_list_utf_16to8(argc, argv);
954 create_app_running_mutex();
955 #if !GLIB_CHECK_VERSION(2,31,0)
961 * Get credential information for later use.
963 init_process_policies();
966 * Attempt to get the pathname of the executable file.
968 init_progfile_dir_error = init_progfile_dir(argv[0], main);
969 if (init_progfile_dir_error != NULL) {
970 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
971 init_progfile_dir_error);
975 * In order to have the -X opts assigned before the wslua machine starts
976 * we need to call getopts before epan_init() gets called.
979 optind_initial = optind;
981 while ((opt = getopt(argc, argv, optstring)) != -1) {
983 case 'C': /* Configuration Profile */
984 if (profile_exists (optarg, FALSE)) {
985 set_profile_name (optarg);
987 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
991 case 'P': /* Print packet summary info even when writing to a file */
992 print_packet_info = TRUE;
993 print_summary = TRUE;
995 case 'O': /* Only output these protocols */
996 output_only = g_strdup(optarg);
998 case 'V': /* Verbose */
999 print_details = TRUE;
1000 print_packet_info = TRUE;
1002 case 'x': /* Print packet data in hex (and ASCII) */
1004 /* The user asked for hex output, so let's ensure they get it,
1005 * even if they're writing to a file.
1007 print_packet_info = TRUE;
1018 * Print packet summary information is the default, unless either -V or -x
1019 * were specified and -P was not. Note that this is new behavior, which
1020 * allows for the possibility of printing only hex/ascii output without
1021 * necessarily requiring that either the summary or details be printed too.
1023 if (print_summary == -1)
1024 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1026 optind = optind_initial;
1031 /** Send All g_log messages to our own handler **/
1035 G_LOG_LEVEL_CRITICAL|
1036 G_LOG_LEVEL_WARNING|
1037 G_LOG_LEVEL_MESSAGE|
1040 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1042 g_log_set_handler(NULL,
1043 (GLogLevelFlags)log_flags,
1044 tshark_log_handler, NULL /* user_data */);
1045 g_log_set_handler(LOG_DOMAIN_MAIN,
1046 (GLogLevelFlags)log_flags,
1047 tshark_log_handler, NULL /* user_data */);
1050 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1051 (GLogLevelFlags)log_flags,
1052 tshark_log_handler, NULL /* user_data */);
1053 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1054 (GLogLevelFlags)log_flags,
1055 tshark_log_handler, NULL /* user_data */);
1058 initialize_funnel_ops();
1061 capture_opts_init(&global_capture_opts);
1062 capture_session_init(&global_capture_session, (void *)&cfile);
1065 timestamp_set_type(TS_RELATIVE);
1066 timestamp_set_precision(TS_PREC_AUTO);
1067 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1069 /* Register all dissectors; we must do this before checking for the
1070 "-G" flag, as the "-G" flag dumps information registered by the
1071 dissectors, and we must do it before we read the preferences, in
1072 case any dissectors register preferences. */
1073 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1074 failure_message, open_failure_message, read_failure_message,
1075 write_failure_message);
1077 /* Register all tap listeners; we do this before we parse the arguments,
1078 as the "-z" argument can specify a registered tap. */
1080 /* we register the plugin taps before the other taps because
1081 stats_tree taps plugins will be registered as tap listeners
1082 by stats_tree_stat.c and need to registered before that */
1084 register_all_plugin_tap_listeners();
1086 register_all_tap_listeners();
1088 /* If invoked with the "-G" flag, we dump out information based on
1089 the argument to the "-G" flag; if no argument is specified,
1090 for backwards compatibility we dump out a glossary of display
1093 XXX - we do this here, for now, to support "-G" with no arguments.
1094 If none of our build or other processes uses "-G" with no arguments,
1095 we can just process it with the other arguments. */
1096 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1097 proto_initialize_all_prefixes();
1100 proto_registrar_dump_fields();
1102 if (strcmp(argv[2], "fields") == 0)
1103 proto_registrar_dump_fields();
1104 else if (strcmp(argv[2], "protocols") == 0)
1105 proto_registrar_dump_protocols();
1106 else if (strcmp(argv[2], "values") == 0)
1107 proto_registrar_dump_values();
1108 else if (strcmp(argv[2], "ftypes") == 0)
1109 proto_registrar_dump_ftypes();
1110 else if (strcmp(argv[2], "decodes") == 0)
1111 dissector_dump_decodes();
1112 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1113 dissector_dump_heur_decodes();
1114 else if (strcmp(argv[2], "defaultprefs") == 0)
1116 else if (strcmp(argv[2], "plugins") == 0)
1118 else if (strcmp(argv[2], "?") == 0)
1119 glossary_option_help();
1120 else if (strcmp(argv[2], "-?") == 0)
1121 glossary_option_help();
1122 else if (strcmp(argv[2], "currentprefs") == 0) {
1123 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1124 &pf_open_errno, &pf_read_errno, &pf_path);
1127 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1134 /* Set the C-language locale to the native environment. */
1135 setlocale(LC_ALL, "");
1137 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1138 &pf_open_errno, &pf_read_errno, &pf_path);
1139 if (gpf_path != NULL) {
1140 if (gpf_open_errno != 0) {
1141 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1142 pf_path, g_strerror(gpf_open_errno));
1144 if (gpf_read_errno != 0) {
1145 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1146 pf_path, g_strerror(gpf_read_errno));
1149 if (pf_path != NULL) {
1150 if (pf_open_errno != 0) {
1151 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1152 g_strerror(pf_open_errno));
1154 if (pf_read_errno != 0) {
1155 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1156 pf_path, g_strerror(pf_read_errno));
1162 /* Read the disabled protocols file. */
1163 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1164 &dp_path, &dp_open_errno, &dp_read_errno);
1165 if (gdp_path != NULL) {
1166 if (gdp_open_errno != 0) {
1167 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1168 gdp_path, g_strerror(gdp_open_errno));
1170 if (gdp_read_errno != 0) {
1171 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1172 gdp_path, g_strerror(gdp_read_errno));
1176 if (dp_path != NULL) {
1177 if (dp_open_errno != 0) {
1179 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1180 g_strerror(dp_open_errno));
1182 if (dp_read_errno != 0) {
1184 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1185 g_strerror(dp_read_errno));
1190 check_capture_privs();
1192 cap_file_init(&cfile);
1194 /* Print format defaults to this. */
1195 print_format = PR_FMT_TEXT;
1197 output_fields = output_fields_new();
1199 /* Now get our args */
1200 while ((opt = getopt(argc, argv, optstring)) != -1) {
1202 case '2': /* Perform two pass analysis */
1203 perform_two_pass_analysis = TRUE;
1205 case 'a': /* autostop criteria */
1206 case 'b': /* Ringbuffer option */
1207 case 'c': /* Capture x packets */
1208 case 'f': /* capture filter */
1209 case 'g': /* enable group read access on file(s) */
1210 case 'i': /* Use interface x */
1211 case 'p': /* Don't capture in promiscuous mode */
1212 #ifdef HAVE_PCAP_REMOTE
1213 case 'A': /* Authentication */
1215 #ifdef HAVE_PCAP_CREATE
1216 case 'I': /* Capture in monitor mode, if available */
1218 case 's': /* Set the snapshot (capture) length */
1219 case 'w': /* Write to capture file x */
1220 case 'y': /* Set the pcap data link type */
1221 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1222 case 'B': /* Buffer size */
1223 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1225 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1230 capture_option_specified = TRUE;
1235 /* Configuration profile settings were already processed just ignore them this time*/
1237 case 'd': /* Decode as rule */
1238 if (!add_decode_as(optarg))
1241 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1242 case 'K': /* Kerberos keytab file */
1243 read_keytab_file(optarg);
1246 case 'D': /* Print a list of capture devices and exit */
1248 if_list = capture_interface_list(&err, &err_str);
1249 if (if_list == NULL) {
1251 case CANT_GET_INTERFACE_LIST:
1252 case DONT_HAVE_PCAP:
1253 cmdarg_err("%s", err_str);
1257 case NO_INTERFACES_FOUND:
1258 cmdarg_err("There are no interfaces on which a capture can be done");
1263 capture_opts_print_interfaces(if_list);
1264 free_interface_list(if_list);
1267 capture_option_specified = TRUE;
1273 output_fields_add(output_fields, optarg);
1277 if (!output_fields_set_option(output_fields, optarg)) {
1278 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1279 output_fields_list_options(stderr);
1284 out_file_type = wtap_short_string_to_file_type(optarg);
1285 if (out_file_type < 0) {
1286 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1287 list_capture_types();
1291 case 'W': /* Select extra information to save in our capture file */
1292 /* This is patterned after the -N flag which may not be the best idea. */
1293 if (strchr(optarg, 'n')) {
1294 out_file_name_res = TRUE;
1296 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1300 case 'H': /* Read address to name mappings from a hosts file */
1301 if (! add_hosts_file(optarg))
1303 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1306 out_file_name_res = TRUE;
1309 case 'h': /* Print help and exit */
1313 case 'l': /* "Line-buffer" standard output */
1314 /* This isn't line-buffering, strictly speaking, it's just
1315 flushing the standard output after the information for
1316 each packet is printed; however, that should be good
1317 enough for all the purposes to which "-l" is put (and
1318 is probably actually better for "-V", as it does fewer
1321 See the comment in "process_packet()" for an explanation of
1322 why we do that, and why we don't just use "setvbuf()" to
1323 make the standard output line-buffered (short version: in
1324 Windows, "line-buffered" is the same as "fully-buffered",
1325 and the output buffer is only flushed when it fills up). */
1326 line_buffered = TRUE;
1328 case 'L': /* Print list of link-layer types and exit */
1330 list_link_layer_types = TRUE;
1332 capture_option_specified = TRUE;
1336 case 'n': /* No name resolution */
1337 gbl_resolv_flags.mac_name = FALSE;
1338 gbl_resolv_flags.network_name = FALSE;
1339 gbl_resolv_flags.transport_name = FALSE;
1340 gbl_resolv_flags.concurrent_dns = FALSE;
1342 case 'N': /* Select what types of addresses/port #s to resolve */
1343 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1344 if (badopt != '\0') {
1345 cmdarg_err("-N specifies unknown resolving option '%c';",
1347 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1351 case 'o': /* Override preference from command line */
1352 switch (prefs_set_pref(optarg)) {
1357 case PREFS_SET_SYNTAX_ERR:
1358 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1362 case PREFS_SET_NO_SUCH_PREF:
1363 case PREFS_SET_OBSOLETE:
1364 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1369 case 'q': /* Quiet */
1372 case 'Q': /* Really quiet */
1374 really_quiet = TRUE;
1376 case 'r': /* Read capture file x */
1377 cf_name = g_strdup(optarg);
1379 case 'R': /* Read file filter */
1383 /* already processed; just ignore it now */
1385 case 'S': /* Set the line Separator to be printed between packets */
1386 separator = strdup(optarg);
1388 case 't': /* Time stamp type */
1389 if (strcmp(optarg, "r") == 0)
1390 timestamp_set_type(TS_RELATIVE);
1391 else if (strcmp(optarg, "a") == 0)
1392 timestamp_set_type(TS_ABSOLUTE);
1393 else if (strcmp(optarg, "ad") == 0)
1394 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1395 else if (strcmp(optarg, "d") == 0)
1396 timestamp_set_type(TS_DELTA);
1397 else if (strcmp(optarg, "dd") == 0)
1398 timestamp_set_type(TS_DELTA_DIS);
1399 else if (strcmp(optarg, "e") == 0)
1400 timestamp_set_type(TS_EPOCH);
1401 else if (strcmp(optarg, "u") == 0)
1402 timestamp_set_type(TS_UTC);
1403 else if (strcmp(optarg, "ud") == 0)
1404 timestamp_set_type(TS_UTC_WITH_DATE);
1406 cmdarg_err("Invalid time stamp type \"%s\"",
1408 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1409 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1413 case 'T': /* printing Type */
1414 if (strcmp(optarg, "text") == 0) {
1415 output_action = WRITE_TEXT;
1416 print_format = PR_FMT_TEXT;
1417 } else if (strcmp(optarg, "ps") == 0) {
1418 output_action = WRITE_TEXT;
1419 print_format = PR_FMT_PS;
1420 } else if (strcmp(optarg, "pdml") == 0) {
1421 output_action = WRITE_XML;
1422 print_details = TRUE; /* Need details */
1423 print_summary = FALSE; /* Don't allow summary */
1424 } else if (strcmp(optarg, "psml") == 0) {
1425 output_action = WRITE_XML;
1426 print_details = FALSE; /* Don't allow details */
1427 print_summary = TRUE; /* Need summary */
1428 } else if (strcmp(optarg, "fields") == 0) {
1429 output_action = WRITE_FIELDS;
1430 print_details = TRUE; /* Need full tree info */
1431 print_summary = FALSE; /* Don't allow summary */
1433 cmdarg_err("Invalid -T parameter.");
1434 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1438 case 'u': /* Seconds type */
1439 if (strcmp(optarg, "s") == 0)
1440 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1441 else if (strcmp(optarg, "hms") == 0)
1442 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1444 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1445 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1449 case 'v': /* Show version and exit */
1451 show_version(comp_info_str, runtime_info_str);
1452 g_string_free(comp_info_str, TRUE);
1453 g_string_free(runtime_info_str, TRUE);
1454 /* We don't really have to cleanup here, but it's a convenient way to test
1455 * start-up and shut-down of the epan library without any UI-specific
1456 * cruft getting in the way. Makes the results of running
1457 * $ ./tools/valgrind-wireshark -n
1458 * much more useful. */
1462 case 'O': /* Only output these protocols */
1463 /* already processed; just ignore it now */
1465 case 'V': /* Verbose */
1466 /* already processed; just ignore it now */
1468 case 'x': /* Print packet data in hex (and ASCII) */
1469 /* already processed; just ignore it now */
1477 /* We won't call the init function for the stat this soon
1478 as it would disallow MATE's fields (which are registered
1479 by the preferences set callback) from being used as
1480 part of a tap filter. Instead, we just add the argument
1481 to a list of stat arguments. */
1482 if (!process_stat_cmd_arg(optarg)) {
1483 if (strcmp("help", optarg)==0) {
1484 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1485 list_stat_cmd_args();
1488 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1489 cmdarg_err_cont(" -z argument must be one of :");
1490 list_stat_cmd_args();
1495 case '?': /* Bad flag - print usage message */
1498 list_capture_types();
1508 /* If we specified output fields, but not the output field type... */
1509 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1510 cmdarg_err("Output fields were specified with \"-e\", "
1511 "but \"-Tfields\" was not specified.");
1513 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1514 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1515 "specified with \"-e\".");
1520 /* If no capture filter or display filter has been specified, and there are
1521 still command-line arguments, treat them as the tokens of a capture
1522 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1523 flag was specified. */
1524 if (optind < argc) {
1525 if (cf_name != NULL) {
1526 if (dfilter != NULL) {
1527 cmdarg_err("Display filters were specified both with \"-d\" "
1528 "and with additional command-line arguments.");
1531 dfilter = get_args_as_string(argc, argv, optind);
1536 if (global_capture_opts.default_options.cfilter) {
1537 cmdarg_err("A default capture filter was specified both with \"-f\""
1538 " and with additional command-line arguments.");
1541 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1542 interface_options interface_opts;
1543 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1544 if (interface_opts.cfilter == NULL) {
1545 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1546 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1547 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1549 cmdarg_err("A capture filter was specified both with \"-f\""
1550 " and with additional command-line arguments.");
1554 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1556 capture_option_specified = TRUE;
1562 if (!global_capture_opts.saving_to_file) {
1563 /* We're not saving the capture to a file; if "-q" wasn't specified,
1564 we should print packet information */
1566 print_packet_info = TRUE;
1568 /* We're saving to a file; if we're writing to the standard output.
1569 and we'll also be writing dissected packets to the standard
1570 output, reject the request. At best, we could redirect that
1571 to the standard error; we *can't* write both to the standard
1572 output and have either of them be useful. */
1573 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1574 cmdarg_err("You can't write both raw packet data and dissected packets"
1575 " to the standard output.");
1580 /* We're not saving the capture to a file; if "-q" wasn't specified,
1581 we should print packet information */
1583 print_packet_info = TRUE;
1586 #ifndef HAVE_LIBPCAP
1587 if (capture_option_specified)
1588 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1595 /* We don't support capture filters when reading from a capture file
1596 (the BPF compiler doesn't support all link-layer types that we
1597 support in capture files we read). */
1599 if (cf_name != NULL) {
1600 if (global_capture_opts.default_options.cfilter) {
1601 cmdarg_err("Only read filters, not capture filters, "
1602 "can be specified when reading a capture file.");
1609 if (output_action != WRITE_TEXT) {
1610 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1615 if (output_only != NULL) {
1618 if (!print_details) {
1619 cmdarg_err("-O requires -V");
1623 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1624 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1625 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1629 if (rfilter != NULL && !perform_two_pass_analysis) {
1630 /* Just a warning, so we don't return */
1631 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1635 if (list_link_layer_types) {
1636 /* We're supposed to list the link-layer types for an interface;
1637 did the user also specify a capture file to be read? */
1639 /* Yes - that's bogus. */
1640 cmdarg_err("You can't specify -L and a capture file to be read.");
1643 /* No - did they specify a ring buffer option? */
1644 if (global_capture_opts.multi_files_on) {
1645 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1651 * "-r" was specified, so we're reading a capture file.
1652 * Capture options don't apply here.
1654 if (global_capture_opts.multi_files_on) {
1655 cmdarg_err("Multiple capture files requested, but "
1656 "a capture isn't being done.");
1659 if (global_capture_opts.has_file_duration) {
1660 cmdarg_err("Switching capture files after a time interval was specified, but "
1661 "a capture isn't being done.");
1664 if (global_capture_opts.has_ring_num_files) {
1665 cmdarg_err("A ring buffer of capture files was specified, but "
1666 "a capture isn't being done.");
1669 if (global_capture_opts.has_autostop_files) {
1670 cmdarg_err("A maximum number of capture files was specified, but "
1671 "a capture isn't being done.");
1675 /* Note: TShark now allows the restriction of a _read_ file by packet count
1676 * and byte count as well as a write file. Other autostop options remain valid
1677 * only for a write file.
1679 if (global_capture_opts.has_autostop_duration) {
1680 cmdarg_err("A maximum capture time was specified, but "
1681 "a capture isn't being done.");
1686 * "-r" wasn't specified, so we're doing a live capture.
1688 if (global_capture_opts.saving_to_file) {
1689 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1691 /* When capturing, we only support writing pcap or pcap-ng format. */
1692 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1693 cmdarg_err("Live captures can only be saved in libpcap format.");
1696 if (global_capture_opts.multi_files_on) {
1697 /* Multiple-file mode doesn't work under certain conditions:
1698 a) it doesn't work if you're writing to the standard output;
1699 b) it doesn't work if you're writing to a pipe;
1701 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1702 cmdarg_err("Multiple capture files requested, but "
1703 "the capture is being written to the standard output.");
1706 if (global_capture_opts.output_to_pipe) {
1707 cmdarg_err("Multiple capture files requested, but "
1708 "the capture file is a pipe.");
1711 if (!global_capture_opts.has_autostop_filesize &&
1712 !global_capture_opts.has_file_duration) {
1713 cmdarg_err("Multiple capture files requested, but "
1714 "no maximum capture file size or duration was specified.");
1718 /* Currently, we don't support read or display filters when capturing
1719 and saving the packets. */
1720 if (rfilter != NULL) {
1721 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1724 if (dfilter != NULL) {
1725 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1729 /* They didn't specify a "-w" flag, so we won't be saving to a
1730 capture file. Check for options that only make sense if
1731 we're saving to a file. */
1732 if (global_capture_opts.has_autostop_filesize) {
1733 cmdarg_err("Maximum capture file size specified, but "
1734 "capture isn't being saved to a file.");
1737 if (global_capture_opts.multi_files_on) {
1738 cmdarg_err("Multiple capture files requested, but "
1739 "the capture isn't being saved to a file.");
1748 /* Start windows sockets */
1749 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1752 /* Notify all registered modules that have had any of their preferences
1753 changed either from one of the preferences file or from the command
1754 line that their preferences have changed. */
1757 /* At this point MATE will have registered its field array so we can
1758 have a tap filter with one of MATE's late-registered fields as part
1759 of the filter. We can now process all the "-z" arguments. */
1760 start_requested_stats();
1763 /* We currently don't support taps, or printing dissected packets,
1764 if we're writing to a pipe. */
1765 if (global_capture_opts.saving_to_file &&
1766 global_capture_opts.output_to_pipe) {
1767 if (tap_listeners_require_dissection()) {
1768 cmdarg_err("Taps aren't supported when saving to a pipe.");
1771 if (print_packet_info) {
1772 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1778 /* disabled protocols as per configuration file */
1779 if (gdp_path == NULL && dp_path == NULL) {
1780 set_disabled_protos_list();
1783 /* Build the column format array */
1784 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1787 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1788 capture_opts_trim_ring_num_files(&global_capture_opts);
1791 if (rfilter != NULL) {
1792 if (!dfilter_compile(rfilter, &rfcode)) {
1793 cmdarg_err("%s", dfilter_error_msg);
1795 #ifdef HAVE_PCAP_OPEN_DEAD
1799 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1801 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1803 " Note: That read filter code looks like a valid capture filter;");
1805 " maybe you mixed them up?");
1814 cfile.rfcode = rfcode;
1816 if (dfilter != NULL) {
1817 if (!dfilter_compile(dfilter, &dfcode)) {
1818 cmdarg_err("%s", dfilter_error_msg);
1820 #ifdef HAVE_PCAP_OPEN_DEAD
1824 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1826 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1828 " Note: That display filter code looks like a valid capture filter;");
1830 " maybe you mixed them up?");
1839 cfile.dfcode = dfcode;
1841 if (print_packet_info) {
1842 /* If we're printing as text or PostScript, we have
1843 to create a print stream. */
1844 if (output_action == WRITE_TEXT) {
1845 switch (print_format) {
1848 print_stream = print_stream_text_stdio_new(stdout);
1852 print_stream = print_stream_ps_stdio_new(stdout);
1856 g_assert_not_reached();
1861 /* We have to dissect each packet if:
1863 we're printing information about each packet;
1865 we're using a read filter on the packets;
1867 we're using a display filter on the packets;
1869 we're using any taps that need dissection. */
1870 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1874 * We're reading a capture file.
1878 * Immediately relinquish any special privileges we have; we must not
1879 * be allowed to read any capture files the user running TShark
1882 relinquish_special_privs_perm();
1883 print_current_user();
1885 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1890 /* Set timestamp precision; there should arguably be a command-line
1891 option to let the user set this. */
1892 switch(wtap_file_tsprecision(cfile.wth)) {
1893 case(WTAP_FILE_TSPREC_SEC):
1894 timestamp_set_precision(TS_PREC_AUTO_SEC);
1896 case(WTAP_FILE_TSPREC_DSEC):
1897 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1899 case(WTAP_FILE_TSPREC_CSEC):
1900 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1902 case(WTAP_FILE_TSPREC_MSEC):
1903 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1905 case(WTAP_FILE_TSPREC_USEC):
1906 timestamp_set_precision(TS_PREC_AUTO_USEC);
1908 case(WTAP_FILE_TSPREC_NSEC):
1909 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1912 g_assert_not_reached();
1915 /* Process the packets in the file */
1918 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1919 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1920 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1922 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1925 CATCH(OutOfMemoryError) {
1929 "Sorry, but TShark has to terminate now!\n"
1931 "Some infos / workarounds can be found at:\n"
1932 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1937 /* We still dump out the results of taps, etc., as we might have
1938 read some packets; however, we exit with an error status. */
1942 /* No capture file specified, so we're supposed to do a live capture
1943 or get a list of link-layer types for a live capture device;
1944 do we have support for live captures? */
1946 /* if no interface was specified, pick a default */
1947 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1948 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1949 if (exit_status != 0)
1952 /* if requested, list the link layer types and exit */
1953 if (list_link_layer_types) {
1956 /* Get the list of link-layer types for the capture devices. */
1957 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1958 interface_options interface_opts;
1959 if_capabilities_t *caps;
1961 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1962 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1964 cmdarg_err("%s", err_str);
1968 if (caps->data_link_types == NULL) {
1969 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1972 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1973 free_if_capabilities(caps);
1978 if (print_packet_info) {
1979 if (!write_preamble(NULL)) {
1980 show_print_file_io_error(errno);
1983 } else if (!quiet) {
1985 * We're not printing information for each packet, and the user
1986 * didn't ask us not to print a count of packets as they arrive,
1987 * so print that count so the user knows that packets are arriving.
1989 * XXX - what if the user wants to do a live capture, doesn't want
1990 * to save it to a file, doesn't want information printed for each
1991 * packet, does want some "-z" statistic, and wants packet counts
1992 * so they know whether they're seeing any packets?
1994 print_packet_counts = TRUE;
1997 /* For now, assume libpcap gives microsecond precision. */
1998 timestamp_set_precision(TS_PREC_AUTO_USEC);
2001 * XXX - this returns FALSE if an error occurred, but it also
2002 * returns FALSE if the capture stops because a time limit
2003 * was reached (and possibly other limits), so we can't assume
2004 * it means an error.
2006 * The capture code is a bit twisty, so it doesn't appear to
2007 * be an easy fix. We just ignore the return value for now.
2008 * Instead, pass on the exit status from the capture child.
2011 exit_status = global_capture_session.fork_child_status;
2013 if (print_packet_info) {
2014 if (!write_finale()) {
2016 show_print_file_io_error(err);
2020 /* No - complain. */
2021 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2028 if (cfile.frames != NULL) {
2029 free_frame_data_sequence(cfile.frames);
2030 cfile.frames = NULL;
2033 draw_tap_listeners(TRUE);
2034 funnel_dump_all_text_windows();
2037 output_fields_free(output_fields);
2038 output_fields = NULL;
2043 /*#define USE_BROKEN_G_MAIN_LOOP*/
2045 #ifdef USE_BROKEN_G_MAIN_LOOP
2048 gboolean loop_running = FALSE;
2050 guint32 packet_count = 0;
2053 /* XXX - move to the right position / file */
2054 /* read from a pipe (callback) */
2055 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2057 typedef struct pipe_input_tag {
2061 pipe_input_cb_t input_cb;
2062 guint pipe_input_id;
2064 GMutex *callback_running;
2068 static pipe_input_t pipe_input;
2071 /* The timer has expired, see if there's stuff to read from the pipe,
2072 if so, do the callback */
2074 pipe_timer_cb(gpointer data)
2080 pipe_input_t *pipe_input_p = data;
2081 gint iterations = 0;
2083 g_mutex_lock (pipe_input_p->callback_running);
2085 /* try to read data from the pipe only 5 times, to avoid blocking */
2086 while(iterations < 5) {
2087 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2089 /* Oddly enough although Named pipes don't work on win9x,
2090 PeekNamedPipe does !!! */
2091 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2092 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2094 /* Get the child process exit status */
2095 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2098 /* If the Peek returned an error, or there are bytes to be read
2099 or the childwatcher thread has terminated then call the normal
2101 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2103 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2105 /* And call the real handler */
2106 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2107 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2108 /* pipe closed, return false so that the timer is stopped */
2109 g_mutex_unlock (pipe_input_p->callback_running);
2114 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2115 /* No data, stop now */
2122 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2124 g_mutex_unlock (pipe_input_p->callback_running);
2126 /* we didn't stopped the timer, so let it run */
2133 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2136 pipe_input.source = source;
2137 pipe_input.child_process = child_process;
2138 pipe_input.user_data = user_data;
2139 pipe_input.input_cb = input_cb;
2142 #if GLIB_CHECK_VERSION(2,31,0)
2143 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2144 g_mutex_init(pipe_input.callback_running);
2146 pipe_input.callback_running = g_mutex_new();
2148 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2149 do this but that doesn't cover all win32 platforms. GTK can do
2150 this but doesn't seem to work over processes. Attempt to do
2151 something similar here, start a timer and check for data on every
2153 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2154 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2165 GString *str = g_string_new("");
2166 #ifdef USE_TSHARK_SELECT
2170 struct sigaction action, oldaction;
2174 * XXX - dropping privileges is still required, until code cleanup is done
2176 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2177 * when it's done, we don't need special privileges to run tshark at all,
2178 * therefore we don't need to drop these privileges
2179 * The only thing we might want to keep is a warning if tshark is run as root,
2180 * as it's no longer necessary and potentially dangerous.
2182 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2183 * We've opened the capture device, so we shouldn't need any special
2184 * privileges any more; relinquish those privileges.
2186 * XXX - if we have saved set-user-ID support, we should give up those
2187 * privileges immediately, and then reclaim them long enough to get
2188 * a list of network interfaces and to open one, and then give them
2189 * up again, so that stuff we do while processing the argument list,
2190 * reading the user's preferences, loading and starting plugins
2191 * (especially *user* plugins), etc. is done with the user's privileges,
2192 * not special privileges.
2194 relinquish_special_privs_perm();
2195 print_current_user();
2197 /* Cleanup all data structures used for dissection. */
2198 cleanup_dissection();
2199 /* Initialize all data structures used for dissection. */
2203 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2204 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2206 /* Catch SIGINT and SIGTERM and, if we get either of them,
2207 clean up and exit. If SIGHUP isn't being ignored, catch
2208 it too and, if we get it, clean up and exit.
2210 We restart any read that was in progress, so that it doesn't
2211 disrupt reading from the sync pipe. The signal handler tells
2212 the capture child to finish; it will report that it finished,
2213 or will exit abnormally, so we'll stop reading from the sync
2214 pipe, pick up the exit status, and quit. */
2215 memset(&action, 0, sizeof(action));
2216 action.sa_handler = capture_cleanup;
2217 action.sa_flags = SA_RESTART;
2218 sigemptyset(&action.sa_mask);
2219 sigaction(SIGTERM, &action, NULL);
2220 sigaction(SIGINT, &action, NULL);
2221 sigaction(SIGHUP, NULL, &oldaction);
2222 if (oldaction.sa_handler == SIG_DFL)
2223 sigaction(SIGHUP, &action, NULL);
2226 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2227 quiet mode, report the number of packets we've captured.
2229 Again, restart any read that was in progress, so that it doesn't
2230 disrupt reading from the sync pipe. */
2231 action.sa_handler = report_counts_siginfo;
2232 action.sa_flags = SA_RESTART;
2233 sigemptyset(&action.sa_mask);
2234 sigaction(SIGINFO, &action, NULL);
2235 #endif /* SIGINFO */
2238 global_capture_session.state = CAPTURE_PREPARING;
2240 /* Let the user know which interfaces were chosen. */
2241 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2242 interface_options interface_opts;
2244 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2245 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2246 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2247 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2250 if (global_capture_opts.ifaces->len < 2) {
2252 if (global_capture_opts.ifaces->len < 4) {
2254 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2255 interface_options interface_opts;
2257 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2259 if (global_capture_opts.ifaces->len > 2) {
2260 g_string_append_printf(str, ",");
2262 g_string_append_printf(str, " ");
2263 if (i == global_capture_opts.ifaces->len - 1) {
2264 g_string_append_printf(str, "and ");
2267 g_string_append_printf(str, "'%s'", interface_opts.descr);
2270 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2272 if (really_quiet == FALSE)
2273 fprintf(stderr, "Capturing on %s\n", str->str);
2275 g_string_free(str, TRUE);
2277 ret = sync_pipe_start(&global_capture_opts, &global_capture_session);
2282 /* the actual capture loop
2284 * XXX - glib doesn't seem to provide any event based loop handling.
2286 * XXX - for whatever reason,
2287 * calling g_main_loop_new() ends up in 100% cpu load.
2289 * But that doesn't matter: in UNIX we can use select() to find an input
2290 * source with something to do.
2292 * But that doesn't matter because we're in a CLI (that doesn't need to
2293 * update a GUI or something at the same time) so it's OK if we block
2294 * trying to read from the pipe.
2296 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2297 * wrong (but I leave it there in case I am...).
2300 #ifdef USE_TSHARK_SELECT
2302 FD_SET(pipe_input.source, &readfds);
2305 loop_running = TRUE;
2309 while (loop_running)
2311 #ifdef USE_TSHARK_SELECT
2312 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2318 } else if (ret == 1) {
2320 /* Call the real handler */
2321 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2322 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2325 #ifdef USE_TSHARK_SELECT
2330 CATCH(OutOfMemoryError) {
2334 "Sorry, but TShark has to terminate now!\n"
2336 "Some infos / workarounds can be found at:\n"
2337 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2345 /* XXX - move the call to main_window_update() out of capture_sync.c */
2346 /* dummy for capture_sync.c to make linker happy */
2347 void main_window_update(void)
2351 /* capture child detected an error */
2353 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2355 cmdarg_err("%s", error_msg);
2356 cmdarg_err_cont("%s", secondary_error_msg);
2360 /* capture child detected an capture filter related error */
2362 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2364 capture_options *capture_opts = cap_session->capture_opts;
2365 dfilter_t *rfcode = NULL;
2366 interface_options interface_opts;
2368 g_assert(i < capture_opts->ifaces->len);
2369 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2371 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2373 "Invalid capture filter \"%s\" for interface %s!\n"
2375 "That string looks like a valid display filter; however, it isn't a valid\n"
2376 "capture filter (%s).\n"
2378 "Note that display filters and capture filters don't have the same syntax,\n"
2379 "so you can't use most display filter expressions as capture filters.\n"
2381 "See the User's Guide for a description of the capture filter syntax.",
2382 interface_opts.cfilter, interface_opts.descr, error_message);
2383 dfilter_free(rfcode);
2386 "Invalid capture filter \"%s\" for interface %s!\n"
2388 "That string isn't a valid capture filter (%s).\n"
2389 "See the User's Guide for a description of the capture filter syntax.",
2390 interface_opts.cfilter, interface_opts.descr, error_message);
2395 /* capture child tells us we have a new (or the first) capture file */
2397 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2399 capture_options *capture_opts = cap_session->capture_opts;
2400 gboolean is_tempfile;
2403 if (cap_session->state == CAPTURE_PREPARING) {
2404 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2406 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2408 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2410 /* free the old filename */
2411 if (capture_opts->save_file != NULL) {
2413 /* we start a new capture file, close the old one (if we had one before) */
2414 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2415 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2416 wtap_close(((capture_file *) cap_session->cf)->wth);
2418 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2421 g_free(capture_opts->save_file);
2422 is_tempfile = FALSE;
2424 /* we didn't had a save_file before, must be a tempfile */
2428 /* save the new filename */
2429 capture_opts->save_file = g_strdup(new_file);
2431 /* if we are in real-time mode, open the new file now */
2432 if (do_dissection) {
2433 /* Attempt to open the capture file and set up to read from it. */
2434 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2438 /* Don't unlink (delete) the save file - leave it around,
2439 for debugging purposes. */
2440 g_free(capture_opts->save_file);
2441 capture_opts->save_file = NULL;
2446 cap_session->state = CAPTURE_RUNNING;
2452 /* capture child tells us we have new packets to read */
2454 capture_input_new_packets(capture_session *cap_session, int to_read)
2460 capture_file *cf = (capture_file *)cap_session->cf;
2461 gboolean filtering_tap_listeners;
2466 * Prevent a SIGINFO handler from writing to the standard error while
2467 * we're doing so or writing to the standard output; instead, have it
2468 * just set a flag telling us to print that information when we're done.
2471 #endif /* SIGINFO */
2473 /* Do we have any tap listeners with filters? */
2474 filtering_tap_listeners = have_filtering_tap_listeners();
2476 /* Get the union of the flags for all tap listeners. */
2477 tap_flags = union_of_tap_listener_flags();
2479 if (do_dissection) {
2480 while (to_read-- && cf->wth) {
2481 wtap_cleareof(cf->wth);
2482 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2484 /* read from file failed, tell the capture child to stop */
2485 sync_pipe_stop(cap_session);
2486 wtap_close(cf->wth);
2489 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2490 wtap_buf_ptr(cf->wth),
2491 filtering_tap_listeners, tap_flags);
2494 /* packet successfully read and gone through the "Read Filter" */
2500 * Dumpcap's doing all the work; we're not doing any dissection.
2501 * Count all the packets it wrote.
2503 packet_count += to_read;
2506 if (print_packet_counts) {
2507 /* We're printing packet counts. */
2508 if (packet_count != 0) {
2509 fprintf(stderr, "\r%u ", packet_count);
2510 /* stderr could be line buffered */
2517 * Allow SIGINFO handlers to write.
2522 * If a SIGINFO handler asked us to write out capture counts, do so.
2526 #endif /* SIGINFO */
2532 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2533 /* Report the count only if we aren't printing a packet count
2534 as packets arrive. */
2535 fprintf(stderr, "%u packet%s captured\n", packet_count,
2536 plurality(packet_count, "", "s"));
2539 infoprint = FALSE; /* we just reported it */
2540 #endif /* SIGINFO */
2545 report_counts_siginfo(int signum _U_)
2547 int sav_errno = errno;
2548 /* If we've been told to delay printing, just set a flag asking
2549 that we print counts (if we're supposed to), otherwise print
2550 the count of packets captured (if we're supposed to). */
2557 #endif /* SIGINFO */
2560 /* capture child detected any packet drops? */
2562 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2564 if (print_packet_counts) {
2565 /* We're printing packet counts to stderr.
2566 Send a newline so that we move to the line after the packet count. */
2567 fprintf(stderr, "\n");
2571 /* We're printing packet counts to stderr.
2572 Send a newline so that we move to the line after the packet count. */
2573 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2579 * Capture child closed its side of the pipe, report any error and
2580 * do the required cleanup.
2583 capture_input_closed(capture_session *cap_session, gchar *msg)
2585 capture_file *cf = (capture_file *) cap_session->cf;
2588 fprintf(stderr, "tshark: %s\n", msg);
2592 if (cf != NULL && cf->wth != NULL) {
2593 wtap_close(cf->wth);
2594 if (cf->is_tempfile) {
2595 ws_unlink(cf->filename);
2598 #ifdef USE_BROKEN_G_MAIN_LOOP
2599 /*g_main_loop_quit(loop);*/
2602 loop_running = FALSE;
2611 capture_cleanup(DWORD ctrltype _U_)
2613 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2614 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2615 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2616 like SIGTERM at least when the machine's shutting down.
2618 For now, we handle them all as indications that we should clean up
2619 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2622 We must return TRUE so that no other handler - such as one that would
2623 terminate the process - gets called.
2625 XXX - for some reason, typing ^C to TShark, if you run this in
2626 a Cygwin console window in at least some versions of Cygwin,
2627 causes TShark to terminate immediately; this routine gets
2628 called, but the main loop doesn't get a chance to run and
2629 exit cleanly, at least if this is compiled with Microsoft Visual
2630 C++ (i.e., it's a property of the Cygwin console window or Bash;
2631 it happens if TShark is not built with Cygwin - for all I know,
2632 building it with Cygwin may make the problem go away). */
2634 /* tell the capture child to stop */
2635 sync_pipe_stop(&global_capture_session);
2637 /* don't stop our own loop already here, otherwise status messages and
2638 * cleanup wouldn't be done properly. The child will indicate the stop of
2639 * everything by calling capture_input_closed() later */
2645 capture_cleanup(int signum _U_)
2647 /* tell the capture child to stop */
2648 sync_pipe_stop(&global_capture_session);
2650 /* don't stop our own loop already here, otherwise status messages and
2651 * cleanup wouldn't be done properly. The child will indicate the stop of
2652 * everything by calling capture_input_closed() later */
2655 #endif /* HAVE_LIBPCAP */
2658 process_packet_first_pass(capture_file *cf,
2659 gint64 offset, struct wtap_pkthdr *whdr,
2664 gboolean create_proto_tree = FALSE;
2668 /* The frame number of this packet is one more than the count of
2669 frames in this packet. */
2670 framenum = cf->count + 1;
2672 /* If we're not running a display filter and we're not printing any
2673 packet information, we don't need to do a dissection. This means
2674 that all packets can be marked as 'passed'. */
2677 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2679 /* If we're going to print packet information, or we're going to
2680 run a read filter, or display filter, or we're going to process taps, set up to
2681 do a dissection and do so. */
2682 if (do_dissection) {
2683 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2684 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2685 /* Grab any resolved addresses */
2686 host_name_lookup_process();
2688 /* If we're going to be applying a filter, we'll need to
2689 create a protocol tree against which to apply the filter. */
2691 create_proto_tree = TRUE;
2693 /* We're not going to display the protocol tree on this pass,
2694 so it's not going to be "visible". */
2695 epan_dissect_init(&edt, create_proto_tree, FALSE);
2697 /* If we're running a read filter, prime the epan_dissect_t with that
2700 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2702 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2703 &first_ts, prev_dis, prev_cap);
2705 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2707 /* Run the read filter if we have one. */
2709 passed = dfilter_apply_edt(cf->rfcode, &edt);
2713 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2714 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2716 /* If we're not doing dissection then there won't be any dependent frames.
2717 * More importantly, edt.pi.dependent_frames won't be initialized because
2718 * epan hasn't been initialized.
2720 if (do_dissection) {
2721 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2726 /* if we don't add it to the frame_data_sequence, clean it up right now
2728 frame_data_destroy(&fdlocal);
2729 /* TODO, bug #8160 */
2731 prev_cap_frame = fdlocal;
2732 prev_cap = &prev_cap_frame;
2737 epan_dissect_cleanup(&edt);
2743 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2744 struct wtap_pkthdr *phdr, const guchar *pd,
2745 gboolean filtering_tap_listeners, guint tap_flags)
2747 gboolean create_proto_tree;
2752 /* If we're not running a display filter and we're not printing any
2753 packet information, we don't need to do a dissection. This means
2754 that all packets can be marked as 'passed'. */
2757 /* If we're going to print packet information, or we're going to
2758 run a read filter, or we're going to process taps, set up to
2759 do a dissection and do so. */
2760 if (do_dissection) {
2761 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2762 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2763 /* Grab any resolved addresses */
2764 host_name_lookup_process();
2766 if (cf->dfcode || print_details || filtering_tap_listeners ||
2767 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2768 create_proto_tree = TRUE;
2770 create_proto_tree = FALSE;
2772 /* The protocol tree will be "visible", i.e., printed, only if we're
2773 printing packet details, which is true if we're printing stuff
2774 ("print_packet_info" is true) and we're in verbose mode
2775 ("packet_details" is true). */
2776 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2778 /* If we're running a display filter, prime the epan_dissect_t with that
2781 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2783 col_custom_prime_edt(&edt, &cf->cinfo);
2785 /* We only need the columns if either
2786 1) some tap needs the columns
2788 2) we're printing packet info but we're *not* verbose; in verbose
2789 mode, we print the protocol tree, not the protocol summary.
2791 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2796 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2798 /* Run the read/display filter if we have one. */
2800 passed = dfilter_apply_edt(cf->dfcode, &edt);
2804 /* Process this packet. */
2805 if (print_packet_info) {
2806 /* We're printing packet information; print the information for
2809 print_packet(cf, &edt);
2811 print_packet(cf, NULL);
2813 /* The ANSI C standard does not appear to *require* that a line-buffered
2814 stream be flushed to the host environment whenever a newline is
2815 written, it just says that, on such a stream, characters "are
2816 intended to be transmitted to or from the host environment as a
2817 block when a new-line character is encountered".
2819 The Visual C++ 6.0 C implementation doesn't do what is intended;
2820 even if you set a stream to be line-buffered, it still doesn't
2821 flush the buffer at the end of every line.
2823 So, if the "-l" flag was specified, we flush the standard output
2824 at the end of a packet. This will do the right thing if we're
2825 printing packet summary lines, and, as we print the entire protocol
2826 tree for a single packet without waiting for anything to happen,
2827 it should be as good as line-buffered mode if we're printing
2828 protocol trees. (The whole reason for the "-l" flag in either
2829 tcpdump or TShark is to allow the output of a live capture to
2830 be piped to a program or script and to have that script see the
2831 information for the packet as soon as it's printed, rather than
2832 having to wait until a standard I/O buffer fills up. */
2836 if (ferror(stdout)) {
2837 show_print_file_io_error(errno);
2843 if (do_dissection) {
2844 epan_dissect_cleanup(&edt);
2846 return passed || fdata->flags.dependent_of_displayed;
2850 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2851 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2854 int snapshot_length;
2858 gchar *err_info = NULL;
2860 char *save_file_string = NULL;
2861 gboolean filtering_tap_listeners;
2863 wtapng_section_t *shb_hdr;
2864 wtapng_iface_descriptions_t *idb_inf;
2867 shb_hdr = wtap_file_get_shb_info(cf->wth);
2868 idb_inf = wtap_file_get_idb_info(cf->wth);
2869 #ifdef PCAP_NG_DEFAULT
2870 if (idb_inf->number_of_interfaces > 0) {
2871 linktype = WTAP_ENCAP_PER_PACKET;
2873 linktype = wtap_file_encap(cf->wth);
2876 linktype = wtap_file_encap(cf->wth);
2878 if (save_file != NULL) {
2879 /* Get a string that describes what we're writing to */
2880 save_file_string = output_file_description(save_file);
2882 /* Set up to write to the capture file. */
2883 snapshot_length = wtap_snapshot_length(cf->wth);
2884 if (snapshot_length == 0) {
2885 /* Snapshot length of input file not known. */
2886 snapshot_length = WTAP_MAX_PACKET_SIZE;
2888 /* If we don't have an application name add Tshark */
2889 if (shb_hdr->shb_user_appl == NULL) {
2890 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2891 shb_hdr->shb_user_appl = appname;
2894 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2895 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2901 /* We couldn't set up to write to the capture file. */
2904 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2905 cmdarg_err("Capture files can't be written in that format.");
2908 case WTAP_ERR_UNSUPPORTED_ENCAP:
2909 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2910 cmdarg_err("The capture file being read can't be written as a "
2911 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2914 case WTAP_ERR_CANT_OPEN:
2915 cmdarg_err("The %s couldn't be created for some "
2916 "unknown reason.", save_file_string);
2919 case WTAP_ERR_SHORT_WRITE:
2920 cmdarg_err("A full header couldn't be written to the %s.",
2925 cmdarg_err("The %s could not be created: %s.", save_file_string,
2926 wtap_strerror(err));
2932 if (print_packet_info) {
2933 if (!write_preamble(cf)) {
2935 show_print_file_io_error(err);
2942 if (pdh && out_file_name_res) {
2943 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2944 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2945 wtap_file_type_short_string(out_file_type));
2949 /* Do we have any tap listeners with filters? */
2950 filtering_tap_listeners = have_filtering_tap_listeners();
2952 /* Get the union of the flags for all tap listeners. */
2953 tap_flags = union_of_tap_listener_flags();
2955 if (perform_two_pass_analysis) {
2957 int old_max_packet_count = max_packet_count;
2959 /* Allocate a frame_data_sequence for all the frames. */
2960 cf->frames = new_frame_data_sequence();
2962 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2963 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2964 wtap_buf_ptr(cf->wth))) {
2965 /* Stop reading if we have the maximum number of packets;
2966 * When the -c option has not been used, max_packet_count
2967 * starts at 0, which practically means, never stop reading.
2968 * (unless we roll over max_packet_count ?)
2970 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2971 err = 0; /* This is not an error */
2977 /* Close the sequential I/O side, to free up memory it requires. */
2978 wtap_sequential_close(cf->wth);
2980 /* Allow the protocol dissectors to free up memory that they
2981 * don't need after the sequential run-through of the packets. */
2982 postseq_cleanup_all_protocols();
2984 max_packet_count = old_max_packet_count;
2986 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2987 fdata = frame_data_sequence_find(cf->frames, framenum);
2988 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2989 cf->pd, fdata->cap_len, &err, &err_info)) {
2990 if (process_packet_second_pass(cf, fdata,
2992 filtering_tap_listeners, tap_flags)) {
2993 /* Either there's no read filtering or this packet passed the
2994 filter, so, if we're writing to a capture file, write
2997 if (!wtap_dump(pdh, &cf->phdr, cf->pd, &err)) {
2998 /* Error writing to a capture file */
3001 case WTAP_ERR_UNSUPPORTED_ENCAP:
3003 * This is a problem with the particular frame we're writing;
3004 * note that, and give the frame number.
3006 * XXX - framenum is not necessarily the frame number in
3007 * the input file if there was a read filter.
3010 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3011 framenum, cf->filename,
3012 wtap_file_type_short_string(out_file_type));
3016 show_capture_file_io_error(save_file, err, FALSE);
3019 wtap_dump_close(pdh, &err);
3024 /* Stop reading if we have the maximum number of packets;
3025 * When the -c option has not been used, max_packet_count
3026 * starts at 0, which practically means, never stop reading.
3027 * (unless we roll over max_packet_count ?)
3029 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3030 err = 0; /* This is not an error */
3039 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3042 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3043 wtap_buf_ptr(cf->wth),
3044 filtering_tap_listeners, tap_flags)) {
3045 /* Either there's no read filtering or this packet passed the
3046 filter, so, if we're writing to a capture file, write
3049 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3050 /* Error writing to a capture file */
3053 case WTAP_ERR_UNSUPPORTED_ENCAP:
3055 * This is a problem with the particular frame we're writing;
3056 * note that, and give the frame number.
3059 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3060 framenum, cf->filename,
3061 wtap_file_type_short_string(out_file_type));
3065 show_capture_file_io_error(save_file, err, FALSE);
3068 wtap_dump_close(pdh, &err);
3073 /* Stop reading if we have the maximum number of packets;
3074 * When the -c option has not been used, max_packet_count
3075 * starts at 0, which practically means, never stop reading.
3076 * (unless we roll over max_packet_count ?)
3078 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3079 err = 0; /* This is not an error */
3088 * Print a message noting that the read failed somewhere along the line.
3090 * If we're printing packet data, and the standard output and error are
3091 * going to the same place, flush the standard output, so everything
3092 * buffered up is written, and then print a newline to the standard error
3093 * before printing the error message, to separate it from the packet
3094 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3095 * the _fstat() documentation at Microsoft doesn't indicate whether
3096 * st_ino is even supported.)
3099 if (print_packet_info) {
3100 struct stat stat_stdout, stat_stderr;
3102 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3103 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3104 stat_stdout.st_ino == stat_stderr.st_ino) {
3106 fprintf(stderr, "\n");
3113 case WTAP_ERR_UNSUPPORTED:
3114 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3115 cf->filename, err_info);
3119 case WTAP_ERR_UNSUPPORTED_ENCAP:
3120 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3121 cf->filename, err_info);
3125 case WTAP_ERR_CANT_READ:
3126 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3130 case WTAP_ERR_SHORT_READ:
3131 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3135 case WTAP_ERR_BAD_FILE:
3136 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3137 cf->filename, err_info);
3141 case WTAP_ERR_DECOMPRESS:
3142 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3143 "(%s)", cf->filename, err_info);
3147 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3148 cf->filename, wtap_strerror(err));
3151 if (save_file != NULL) {
3152 /* Now close the capture file. */
3153 if (!wtap_dump_close(pdh, &err))
3154 show_capture_file_io_error(save_file, err, TRUE);
3157 if (save_file != NULL) {
3158 /* Now close the capture file. */
3159 if (!wtap_dump_close(pdh, &err))
3160 show_capture_file_io_error(save_file, err, TRUE);
3162 if (print_packet_info) {
3163 if (!write_finale()) {
3165 show_print_file_io_error(err);
3172 wtap_close(cf->wth);
3175 g_free(save_file_string);
3182 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3184 gboolean filtering_tap_listeners, guint tap_flags)
3187 gboolean create_proto_tree;
3192 /* Count this packet. */
3195 /* If we're not running a display filter and we're not printing any
3196 packet information, we don't need to do a dissection. This means
3197 that all packets can be marked as 'passed'. */
3200 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3202 /* If we're going to print packet information, or we're going to
3203 run a read filter, or we're going to process taps, set up to
3204 do a dissection and do so. */
3205 if (do_dissection) {
3206 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3207 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3208 /* Grab any resolved addresses */
3209 host_name_lookup_process();
3211 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3212 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3213 create_proto_tree = TRUE;
3215 create_proto_tree = FALSE;
3217 /* The protocol tree will be "visible", i.e., printed, only if we're
3218 printing packet details, which is true if we're printing stuff
3219 ("print_packet_info" is true) and we're in verbose mode
3220 ("packet_details" is true). */
3221 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3223 /* If we're running a filter, prime the epan_dissect_t with that
3226 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3228 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3230 col_custom_prime_edt(&edt, &cf->cinfo);
3232 /* We only need the columns if either
3233 1) some tap needs the columns
3235 2) we're printing packet info but we're *not* verbose; in verbose
3236 mode, we print the protocol tree, not the protocol summary.
3238 3) there is a column mapped as an individual field */
3239 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3244 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3245 &first_ts, prev_dis, prev_cap);
3247 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3249 /* Run the filters if we have them. */
3251 passed = dfilter_apply_edt(cf->rfcode, &edt);
3252 if (passed && cf->dfcode)
3253 passed = dfilter_apply_edt(cf->dfcode, &edt);
3257 frame_data_set_after_dissect(&fdata, &cum_bytes);
3259 /* Process this packet. */
3260 if (print_packet_info) {
3261 /* We're printing packet information; print the information for
3264 print_packet(cf, &edt);
3266 print_packet(cf, NULL);
3268 /* The ANSI C standard does not appear to *require* that a line-buffered
3269 stream be flushed to the host environment whenever a newline is
3270 written, it just says that, on such a stream, characters "are
3271 intended to be transmitted to or from the host environment as a
3272 block when a new-line character is encountered".
3274 The Visual C++ 6.0 C implementation doesn't do what is intended;
3275 even if you set a stream to be line-buffered, it still doesn't
3276 flush the buffer at the end of every line.
3278 So, if the "-l" flag was specified, we flush the standard output
3279 at the end of a packet. This will do the right thing if we're
3280 printing packet summary lines, and, as we print the entire protocol
3281 tree for a single packet without waiting for anything to happen,
3282 it should be as good as line-buffered mode if we're printing
3283 protocol trees. (The whole reason for the "-l" flag in either
3284 tcpdump or TShark is to allow the output of a live capture to
3285 be piped to a program or script and to have that script see the
3286 information for the packet as soon as it's printed, rather than
3287 having to wait until a standard I/O buffer fills up. */
3291 if (ferror(stdout)) {
3292 show_print_file_io_error(errno);
3297 /* this must be set after print_packet() [bug #8160] */
3298 prev_dis_frame = fdata;
3299 prev_dis = &prev_dis_frame;
3302 prev_cap_frame = fdata;
3303 prev_cap = &prev_cap_frame;
3305 if (do_dissection) {
3306 epan_dissect_cleanup(&edt);
3307 frame_data_destroy(&fdata);
3313 write_preamble(capture_file *cf)
3315 switch (output_action) {
3318 return print_preamble(print_stream, cf ? cf->filename : NULL);
3322 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3324 write_psml_preamble(stdout);
3325 return !ferror(stdout);
3328 write_fields_preamble(output_fields, stdout);
3329 return !ferror(stdout);
3332 g_assert_not_reached();
3338 get_line_buf(size_t len)
3340 static char *line_bufp = NULL;
3341 static size_t line_buf_len = 256;
3342 size_t new_line_buf_len;
3344 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3345 new_line_buf_len *= 2)
3347 if (line_bufp == NULL) {
3348 line_buf_len = new_line_buf_len;
3349 line_bufp = (char *)g_malloc(line_buf_len + 1);
3351 if (new_line_buf_len > line_buf_len) {
3352 line_buf_len = new_line_buf_len;
3353 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3360 print_columns(capture_file *cf)
3367 line_bufp = get_line_buf(256);
3370 for (i = 0; i < cf->cinfo.num_cols; i++) {
3371 /* Skip columns not marked as visible. */
3372 if (!get_column_visible(i))
3374 switch (cf->cinfo.col_fmt[i]) {
3378 * Don't print this if we're doing a live capture from a network
3379 * interface - if we're doing a live capture, you won't be
3380 * able to look at the capture in the future (it's not being
3381 * saved anywhere), so the frame numbers are unlikely to be
3384 * (XXX - it might be nice to be able to save and print at
3385 * the same time, sort of like an "Update list of packets
3386 * in real time" capture in Wireshark.)
3388 if (global_capture_opts.ifaces->len > 0)
3391 column_len = strlen(cf->cinfo.col_data[i]);
3394 line_bufp = get_line_buf(buf_offset + column_len);
3395 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3401 case COL_ABS_DATE_TIME:
3403 case COL_UTC_DATE_TIME: /* XXX - wider */
3404 column_len = strlen(cf->cinfo.col_data[i]);
3405 if (column_len < 10)
3407 line_bufp = get_line_buf(buf_offset + column_len);
3408 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3414 case COL_DEF_DL_SRC:
3415 case COL_RES_DL_SRC:
3416 case COL_UNRES_DL_SRC:
3417 case COL_DEF_NET_SRC:
3418 case COL_RES_NET_SRC:
3419 case COL_UNRES_NET_SRC:
3420 column_len = strlen(cf->cinfo.col_data[i]);
3421 if (column_len < 12)
3423 line_bufp = get_line_buf(buf_offset + column_len);
3424 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3430 case COL_DEF_DL_DST:
3431 case COL_RES_DL_DST:
3432 case COL_UNRES_DL_DST:
3433 case COL_DEF_NET_DST:
3434 case COL_RES_NET_DST:
3435 case COL_UNRES_NET_DST:
3436 column_len = strlen(cf->cinfo.col_data[i]);
3437 if (column_len < 12)
3439 line_bufp = get_line_buf(buf_offset + column_len);
3440 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3444 column_len = strlen(cf->cinfo.col_data[i]);
3445 line_bufp = get_line_buf(buf_offset + column_len);
3446 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3449 buf_offset += column_len;
3450 if (i != cf->cinfo.num_cols - 1) {
3452 * This isn't the last column, so we need to print a
3453 * separator between this column and the next.
3455 * If we printed a network source and are printing a
3456 * network destination of the same type next, separate
3457 * them with " -> "; if we printed a network destination
3458 * and are printing a network source of the same type
3459 * next, separate them with " <- "; otherwise separate them
3462 * We add enough space to the buffer for " <- " or " -> ",
3463 * even if we're only adding " ".
3465 line_bufp = get_line_buf(buf_offset + 4);
3466 switch (cf->cinfo.col_fmt[i]) {
3471 switch (cf->cinfo.col_fmt[i + 1]) {
3476 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3481 g_strlcat(line_bufp + buf_offset, " ", 5);
3487 case COL_DEF_DL_SRC:
3488 case COL_RES_DL_SRC:
3489 case COL_UNRES_DL_SRC:
3490 switch (cf->cinfo.col_fmt[i + 1]) {
3492 case COL_DEF_DL_DST:
3493 case COL_RES_DL_DST:
3494 case COL_UNRES_DL_DST:
3495 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3500 g_strlcat(line_bufp + buf_offset, " ", 5);
3506 case COL_DEF_NET_SRC:
3507 case COL_RES_NET_SRC:
3508 case COL_UNRES_NET_SRC:
3509 switch (cf->cinfo.col_fmt[i + 1]) {
3511 case COL_DEF_NET_DST:
3512 case COL_RES_NET_DST:
3513 case COL_UNRES_NET_DST:
3514 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3519 g_strlcat(line_bufp + buf_offset, " ", 5);
3528 switch (cf->cinfo.col_fmt[i + 1]) {
3533 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3538 g_strlcat(line_bufp + buf_offset, " ", 5);
3544 case COL_DEF_DL_DST:
3545 case COL_RES_DL_DST:
3546 case COL_UNRES_DL_DST:
3547 switch (cf->cinfo.col_fmt[i + 1]) {
3549 case COL_DEF_DL_SRC:
3550 case COL_RES_DL_SRC:
3551 case COL_UNRES_DL_SRC:
3552 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3557 g_strlcat(line_bufp + buf_offset, " ", 5);
3563 case COL_DEF_NET_DST:
3564 case COL_RES_NET_DST:
3565 case COL_UNRES_NET_DST:
3566 switch (cf->cinfo.col_fmt[i + 1]) {
3568 case COL_DEF_NET_SRC:
3569 case COL_RES_NET_SRC:
3570 case COL_UNRES_NET_SRC:
3571 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3576 g_strlcat(line_bufp + buf_offset, " ", 5);
3583 g_strlcat(line_bufp + buf_offset, " ", 5);
3589 return print_line(print_stream, 0, line_bufp);
3593 print_packet(capture_file *cf, epan_dissect_t *edt)
3595 print_args_t print_args;
3597 if (print_summary || output_fields_has_cols(output_fields)) {
3598 /* Just fill in the columns. */
3599 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3601 if (print_summary) {
3602 /* Now print them. */
3603 switch (output_action) {
3606 if (!print_columns(cf))
3611 proto_tree_write_psml(edt, stdout);
3612 return !ferror(stdout);
3613 case WRITE_FIELDS: /*No non-verbose "fields" format */
3614 g_assert_not_reached();
3619 if (print_details) {
3620 /* Print the information in the protocol tree. */
3621 switch (output_action) {
3624 /* Only initialize the fields that are actually used in proto_tree_print.
3625 * This is particularly important for .range, as that's heap memory which
3626 * we would otherwise have to g_free().
3627 print_args.to_file = TRUE;
3628 print_args.format = print_format;
3629 print_args.print_summary = print_summary;
3630 print_args.print_formfeed = FALSE;
3631 packet_range_init(&print_args.range, &cfile);
3633 print_args.print_hex = print_hex;
3634 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3636 if (!proto_tree_print(&print_args, edt, print_stream))
3639 if (!print_line(print_stream, 0, separator))
3645 proto_tree_write_pdml(edt, stdout);
3647 return !ferror(stdout);
3649 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3651 return !ferror(stdout);
3655 if (print_summary || print_details) {
3656 if (!print_line(print_stream, 0, ""))
3659 if (!print_hex_data(print_stream, edt))
3661 if (!print_line(print_stream, 0, separator))
3670 switch (output_action) {
3673 return print_finale(print_stream);
3677 write_pdml_finale(stdout);
3679 write_psml_finale(stdout);
3680 return !ferror(stdout);
3683 write_fields_finale(output_fields, stdout);
3684 return !ferror(stdout);
3687 g_assert_not_reached();
3693 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3697 char err_msg[2048+1];
3699 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3703 /* The open succeeded. Fill in the information for this file. */
3705 /* Cleanup all data structures used for dissection. */
3706 cleanup_dissection();
3707 /* Initialize all data structures used for dissection. */
3711 cf->f_datalen = 0; /* not used, but set it anyway */
3713 /* Set the file name because we need it to set the follow stream filter.
3714 XXX - is that still true? We need it for other reasons, though,
3716 cf->filename = g_strdup(fname);
3718 /* Indicate whether it's a permanent or temporary file. */
3719 cf->is_tempfile = is_tempfile;
3721 /* No user changes yet. */
3722 cf->unsaved_changes = FALSE;
3724 cf->cd_t = wtap_file_type(cf->wth);
3726 cf->drops_known = FALSE;
3728 cf->snap = wtap_snapshot_length(cf->wth);
3729 if (cf->snap == 0) {
3730 /* Snapshot length not known. */
3731 cf->has_snap = FALSE;
3732 cf->snap = WTAP_MAX_PACKET_SIZE;
3734 cf->has_snap = TRUE;
3735 nstime_set_zero(&cf->elapsed_time);
3736 nstime_set_unset(&first_ts);
3740 cf->state = FILE_READ_IN_PROGRESS;
3742 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3743 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3748 g_snprintf(err_msg, sizeof err_msg,
3749 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3750 cmdarg_err("%s", err_msg);
3755 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3757 char *save_file_string;
3759 save_file_string = output_file_description(fname);
3764 cmdarg_err("Not all the packets could be written to the %s because there is "
3765 "no space left on the file system.",
3771 cmdarg_err("Not all the packets could be written to the %s because you are "
3772 "too close to, or over your disk quota.",
3777 case WTAP_ERR_CANT_CLOSE:
3778 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3782 case WTAP_ERR_SHORT_WRITE:
3783 cmdarg_err("Not all the packets could be written to the %s.",
3789 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3790 wtap_strerror(err));
3792 cmdarg_err("An error occurred while writing to the %s: %s.",
3793 save_file_string, wtap_strerror(err));
3797 g_free(save_file_string);
3801 show_print_file_io_error(int err)
3806 cmdarg_err("Not all the packets could be printed because there is "
3807 "no space left on the file system.");
3812 cmdarg_err("Not all the packets could be printed because you are "
3813 "too close to, or over your disk quota.");
3818 cmdarg_err("An error occurred while printing packets: %s.",
3825 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3829 static char errmsg_errno[1024+1];
3832 /* Wiretap error. */
3835 case WTAP_ERR_NOT_REGULAR_FILE:
3836 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3839 case WTAP_ERR_RANDOM_OPEN_PIPE:
3840 /* Seen only when opening a capture file for reading. */
3841 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3844 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3845 /* Seen only when opening a capture file for reading. */
3846 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3849 case WTAP_ERR_UNSUPPORTED:
3850 /* Seen only when opening a capture file for reading. */
3851 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3852 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3855 errmsg = errmsg_errno;
3858 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3859 /* Seen only when opening a capture file for writing. */
3860 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3861 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3862 "written to a pipe.", wtap_file_type_short_string(file_type));
3863 errmsg = errmsg_errno;
3866 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3867 /* Seen only when opening a capture file for writing. */
3868 errmsg = "TShark doesn't support writing capture files in that format.";
3871 case WTAP_ERR_UNSUPPORTED_ENCAP:
3873 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3874 "TShark can't save this capture as a \"%s\" file.",
3875 wtap_file_type_short_string(file_type));
3877 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3878 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3882 errmsg = errmsg_errno;
3885 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3887 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3888 "TShark can't save this capture as a \"%s\" file.",
3889 wtap_file_type_short_string(file_type));
3890 errmsg = errmsg_errno;
3892 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3895 case WTAP_ERR_BAD_FILE:
3896 /* Seen only when opening a capture file for reading. */
3897 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3898 "The file \"%%s\" appears to be damaged or corrupt.\n"
3901 errmsg = errmsg_errno;
3904 case WTAP_ERR_CANT_OPEN:
3906 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3908 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3911 case WTAP_ERR_SHORT_READ:
3912 errmsg = "The file \"%s\" appears to have been cut short"
3913 " in the middle of a packet or other data.";
3916 case WTAP_ERR_SHORT_WRITE:
3917 errmsg = "A full header couldn't be written to the file \"%s\".";
3920 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3921 errmsg = "This file type cannot be written as a compressed file.";
3924 case WTAP_ERR_DECOMPRESS:
3925 /* Seen only when opening a capture file for reading. */
3926 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3927 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3930 errmsg = errmsg_errno;
3934 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3935 "The file \"%%s\" could not be %s: %s.",
3936 for_writing ? "created" : "opened",
3937 wtap_strerror(err));
3938 errmsg = errmsg_errno;
3942 errmsg = file_open_error_message(err, for_writing);
3947 * Open/create errors are reported with an console message in TShark.
3950 open_failure_message(const char *filename, int err, gboolean for_writing)
3952 fprintf(stderr, "tshark: ");
3953 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3954 fprintf(stderr, "\n");
3959 * General errors are reported with an console message in TShark.
3962 failure_message(const char *msg_format, va_list ap)
3964 fprintf(stderr, "tshark: ");
3965 vfprintf(stderr, msg_format, ap);
3966 fprintf(stderr, "\n");
3970 * Read errors are reported with an console message in TShark.
3973 read_failure_message(const char *filename, int err)
3975 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3976 filename, g_strerror(err));
3980 * Write errors are reported with an console message in TShark.
3983 write_failure_message(const char *filename, int err)
3985 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3986 filename, g_strerror(err));
3990 * Report an error in command-line arguments.
3993 cmdarg_err(const char *fmt, ...)
3998 failure_message(fmt, ap);
4003 * Report additional information for an error in command-line arguments.
4006 cmdarg_err_cont(const char *fmt, ...)
4011 vfprintf(stderr, fmt, ap);
4012 fprintf(stderr, "\n");
4018 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4023 * indent-tabs-mode: nil
4026 * vi: set shiftwidth=2 tabstop=8 expandtab:
4027 * :indentSize=2:tabSize=8:noTabs=true: