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/privileges.h>
60 #include <wsutil/file_util.h>
63 #include <epan/timestamp.h>
64 #include <epan/packet.h>
66 #include "disabled_protos.h"
67 #include <epan/prefs.h>
68 #include <epan/column.h>
70 #include <epan/addr_resolv.h>
72 #include "clopts_common.h"
73 #include "console_io.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_sync.h"
93 #endif /* HAVE_LIBPCAP */
95 #include <epan/funnel.h>
96 #include "capture_opts.h"
99 * This is the template for the decode as option; it is shared between the
100 * various functions that output the usage for this parameter.
102 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
104 static guint32 cum_bytes;
105 static nstime_t first_ts;
106 static frame_data *prev_dis;
107 static frame_data prev_dis_frame;
108 static frame_data *prev_cap;
109 static frame_data prev_cap_frame;
111 static const char* prev_display_dissector_name = NULL;
113 static gboolean perform_two_pass_analysis;
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
125 static output_action_e output_action;
126 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
127 static gboolean print_packet_info;/* TRUE if we're to print packet information */
128 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
129 static gboolean print_details; /* TRUE if we're to print packet details information */
130 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
131 static gboolean line_buffered;
133 static print_format_e print_format = PR_FMT_TEXT;
134 static print_stream_t *print_stream;
136 static output_fields_t* output_fields = NULL;
138 /* The line separator used between packets, changeable via the -S option */
139 static char *separator = "";
143 * TRUE if we're to print packet counts to keep track of captured packets.
145 static gboolean print_packet_counts;
147 static capture_options global_capture_opts;
150 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
151 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
154 static gboolean capture(void);
155 static void report_counts(void);
157 static BOOL WINAPI capture_cleanup(DWORD);
159 static void capture_cleanup(int);
161 static void report_counts_siginfo(int);
164 #endif /* HAVE_LIBPCAP */
166 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
167 static gboolean process_packet(capture_file *cf, gint64 offset,
168 struct wtap_pkthdr *whdr,
169 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
170 static void show_capture_file_io_error(const char *, int, gboolean);
171 static void show_print_file_io_error(int err);
172 static gboolean write_preamble(capture_file *cf);
173 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
174 static gboolean write_finale(void);
175 static const char *cf_open_error_message(int err, gchar *err_info,
176 gboolean for_writing, int file_type);
178 static void open_failure_message(const char *filename, int err,
179 gboolean for_writing);
180 static void failure_message(const char *msg_format, va_list ap);
181 static void read_failure_message(const char *filename, int err);
182 static void write_failure_message(const char *filename, int err);
187 const char *sstr; /* The short string */
188 const char *lstr; /* The long string */
192 string_compare(gconstpointer a, gconstpointer b)
194 return strcmp(((const struct string_elem *)a)->sstr,
195 ((const struct string_elem *)b)->sstr);
199 string_elem_print(gpointer data, gpointer not_used _U_)
201 fprintf(stderr, " %s - %s\n",
202 ((struct string_elem *)data)->sstr,
203 ((struct string_elem *)data)->lstr);
207 list_capture_types(void) {
209 struct string_elem *captypes;
212 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
214 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
215 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
216 if (wtap_dump_can_open(i)) {
217 captypes[i].sstr = wtap_file_type_short_string(i);
218 captypes[i].lstr = wtap_file_type_string(i);
219 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
222 g_slist_foreach(list, string_elem_print, NULL);
228 print_usage(gboolean print_ver)
235 "TShark " VERSION "%s\n"
236 "Dump and analyze network traffic.\n"
237 "See http://www.wireshark.org for more information.\n"
240 wireshark_svnversion, get_copyright_info());
244 fprintf(output, "\n");
245 fprintf(output, "Usage: tshark [options] ...\n");
246 fprintf(output, "\n");
249 fprintf(output, "Capture interface:\n");
250 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
251 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
252 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
253 fprintf(output, " -p don't capture in promiscuous mode\n");
254 #ifdef HAVE_PCAP_CREATE
255 fprintf(output, " -I capture in monitor mode, if available\n");
257 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
258 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
260 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
261 fprintf(output, " -D print list of interfaces and exit\n");
262 fprintf(output, " -L print list of link-layer types of iface and exit\n");
263 fprintf(output, "\n");
264 fprintf(output, "Capture stop conditions:\n");
265 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
266 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
267 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
268 fprintf(output, " files:NUM - stop after NUM files\n");
269 /*fprintf(output, "\n");*/
270 fprintf(output, "Capture output:\n");
271 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
272 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
273 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
274 #endif /* HAVE_LIBPCAP */
275 #ifdef HAVE_PCAP_REMOTE
276 fprintf(output, "RPCAP options:\n");
277 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
279 /*fprintf(output, "\n");*/
280 fprintf(output, "Input file:\n");
281 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
283 fprintf(output, "\n");
284 fprintf(output, "Processing:\n");
285 fprintf(output, " -2 perform a two-pass analysis\n");
286 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
287 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
288 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
289 fprintf(output, " -d %s ...\n", decode_as_arg_template);
290 fprintf(output, " \"Decode As\", see the man page for details\n");
291 fprintf(output, " Example: tcp.port==8888,http\n");
292 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
293 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
295 /*fprintf(output, "\n");*/
296 fprintf(output, "Output:\n");
297 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
298 fprintf(output, " (or to the standard output for \"-\")\n");
299 fprintf(output, " -C <config profile> start with specified configuration profile\n");
300 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
301 fprintf(output, " an empty \"-F\" option will list the file types\n");
302 fprintf(output, " -V add output of packet tree (Packet Details)\n");
303 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
304 fprintf(output, " separated\n");
305 fprintf(output, " -P print packet summary even when writing to a file\n");
306 fprintf(output, " -S <separator> the line separator to print between packets\n");
307 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
308 fprintf(output, " -T pdml|ps|psml|text|fields\n");
309 fprintf(output, " format of text output (def: text)\n");
310 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
311 fprintf(output, " this option can be repeated to print multiple fields\n");
312 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
313 fprintf(output, " header=y|n switch headers on and off\n");
314 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
315 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
316 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
317 fprintf(output, " aggregator\n");
318 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
319 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
320 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
321 fprintf(output, " -l flush standard output after each packet\n");
322 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
323 fprintf(output, " -W n Save extra information in the file, if supported.\n");
324 fprintf(output, " n = write network address resolution information\n");
325 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
326 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
328 fprintf(output, "\n");
329 fprintf(output, "Miscellaneous:\n");
330 fprintf(output, " -h display this help and exit\n");
331 fprintf(output, " -v display version info and exit\n");
332 fprintf(output, " -o <name>:<value> ... override preference setting\n");
333 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
334 fprintf(output, " -G [report] dump one of several available reports and exit\n");
335 fprintf(output, " default report=\"fields\"\n");
336 fprintf(output, " use \"-G ?\" for more help\n");
340 glossary_option_help(void)
346 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
348 fprintf(output, "\n");
349 fprintf(output, "Usage: tshark -G [report]\n");
350 fprintf(output, "\n");
351 fprintf(output, "Glossary table reports:\n");
352 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
353 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
354 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
355 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
356 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
357 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
358 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
359 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
360 fprintf(output, "\n");
361 fprintf(output, "Preference reports:\n");
362 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
363 fprintf(output, " -G currentprefs dump current preferences and exit\n");
364 fprintf(output, "\n");
369 * For a dissector table, print on the stream described by output,
370 * its short name (which is what's used in the "-d" option) and its
374 display_dissector_table_names(const char *table_name, const char *ui_name,
377 if ((prev_display_dissector_name == NULL) ||
378 (strcmp(prev_display_dissector_name, table_name) != 0)) {
379 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
380 prev_display_dissector_name = table_name;
385 * For a dissector handle, print on the stream described by output,
386 * the filter name (which is what's used in the "-d" option) and the full
387 * name for the protocol that corresponds to this handle.
390 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
393 const gchar* proto_filter_name;
394 const gchar* proto_ui_name;
396 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
398 if (proto_id != -1) {
399 proto_filter_name = proto_get_protocol_filter_name(proto_id);
400 proto_ui_name = proto_get_protocol_name(proto_id);
401 g_assert(proto_filter_name != NULL);
402 g_assert(proto_ui_name != NULL);
404 if ((prev_display_dissector_name == NULL) ||
405 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
406 fprintf((FILE *)output, "\t%s (%s)\n",
409 prev_display_dissector_name = proto_filter_name;
415 * The protocol_name_search structure is used by find_protocol_name_func()
416 * to pass parameters and store results
418 struct protocol_name_search{
419 gchar *searched_name; /* Protocol filter name we are looking for */
420 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
421 guint nb_match; /* How many dissectors matched searched_name */
423 typedef struct protocol_name_search *protocol_name_search_t;
426 * This function parses all dissectors associated with a table to find the
427 * one whose protocol has the specified filter name. It is called
428 * as a reference function in a call to dissector_table_foreach_handle.
429 * The name we are looking for, as well as the results, are stored in the
430 * protocol_name_search struct pointed to by user_data.
431 * If called using dissector_table_foreach_handle, we actually parse the
432 * whole list of dissectors.
435 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
439 const gchar *protocol_filter_name;
440 protocol_name_search_t search_info;
444 search_info = (protocol_name_search_t)user_data;
446 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
447 if (proto_id != -1) {
448 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
449 g_assert(protocol_filter_name != NULL);
450 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
452 if (search_info->nb_match == 0) {
453 /* Record this handle only if this is the first match */
454 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
456 search_info->nb_match++;
462 * Allow dissector key names to be sorted alphabetically
466 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
468 return strcmp((const char*)dissector_a, (const char*)dissector_b);
472 * Print all layer type names supported.
473 * We send the output to the stream described by the handle output.
477 fprint_all_layer_types(FILE *output)
480 prev_display_dissector_name = NULL;
481 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
485 * Print all protocol names supported for a specific layer type.
486 * table_name contains the layer type name in which the search is performed.
487 * We send the output to the stream described by the handle output.
491 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
494 prev_display_dissector_name = NULL;
495 dissector_table_foreach_handle(table_name,
496 display_dissector_names,
501 * The function below parses the command-line parameters for the decode as
502 * feature (a string pointer by cl_param).
503 * It checks the format of the command-line, searches for a matching table
504 * and dissector. If a table/dissector match is not found, we display a
505 * summary of the available tables/dissectors (on stderr) and return FALSE.
506 * If everything is fine, we get the "Decode as" preference activated,
507 * then we return TRUE.
510 add_decode_as(const gchar *cl_param)
514 gchar *decoded_param;
515 gchar *remaining_param;
517 gchar *dissector_str;
518 dissector_handle_t dissector_matching;
519 dissector_table_t table_matching;
520 ftenum_t dissector_table_selector_type;
521 struct protocol_name_search user_protocol_name;
523 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
526 decoded_param = g_strdup(cl_param);
527 g_assert(decoded_param);
530 /* The lines below will parse this string (modifying it) to extract all
531 necessary information. Note that decoded_param is still needed since
532 strings are not copied - we just save pointers. */
534 /* This section extracts a layer type (table_name) from decoded_param */
535 table_name = decoded_param; /* Layer type string starts from beginning */
537 remaining_param = strchr(table_name, '=');
538 if (remaining_param == NULL) {
539 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
540 /* If the argument does not follow the template, carry on anyway to check
541 if the table name is at least correct. If remaining_param is NULL,
542 we'll exit anyway further down */
545 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
548 /* Remove leading and trailing spaces from the table name */
549 while ( table_name[0] == ' ' )
551 while ( table_name[strlen(table_name) - 1] == ' ' )
552 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
554 /* The following part searches a table matching with the layer type specified */
555 table_matching = NULL;
557 /* Look for the requested table */
558 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
559 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
562 table_matching = find_dissector_table(table_name);
563 if (!table_matching) {
564 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
568 if (!table_matching) {
569 /* Display a list of supported layer types to help the user, if the
570 specified layer type was not found */
571 cmdarg_err("Valid layer types are:");
572 fprint_all_layer_types(stderr);
574 if (remaining_param == NULL || !table_matching) {
575 /* Exit if the layer type was not found, or if no '=' separator was found
577 g_free(decoded_param);
581 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
582 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
585 remaining_param++; /* Move to the second '=' */
586 *remaining_param = '\0'; /* Remove the second '=' */
588 remaining_param++; /* Position after the layer type string */
590 /* This section extracts a selector value (selector_str) from decoded_param */
592 selector_str = remaining_param; /* Next part starts with the selector number */
594 remaining_param = strchr(selector_str, ',');
595 if (remaining_param == NULL) {
596 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
597 /* If the argument does not follow the template, carry on anyway to check
598 if the selector value is at least correct. If remaining_param is NULL,
599 we'll exit anyway further down */
602 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
605 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
607 switch (dissector_table_selector_type) {
613 /* The selector for this table is an unsigned number. Parse it as such.
614 There's no need to remove leading and trailing spaces from the
615 selector number string, because sscanf will do that for us. */
616 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
617 cmdarg_err("Invalid selector number \"%s\"", selector_str);
618 g_free(decoded_param);
625 /* The selector for this table is a string. */
629 /* There are currently no dissector tables with any types other
630 than the ones listed above. */
631 g_assert_not_reached();
634 if (remaining_param == NULL) {
635 /* Exit if no ',' separator was found (see above) */
636 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
637 fprint_all_protocols_for_layer_types(stderr, table_name);
638 g_free(decoded_param);
642 remaining_param++; /* Position after the selector number string */
644 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
646 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
648 /* Remove leading and trailing spaces from the dissector name */
649 while ( dissector_str[0] == ' ' )
651 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
652 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
654 dissector_matching = NULL;
656 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
657 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 */
658 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
661 user_protocol_name.nb_match = 0;
662 user_protocol_name.searched_name = dissector_str;
663 user_protocol_name.matched_handle = NULL;
665 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 */
667 if (user_protocol_name.nb_match != 0) {
668 dissector_matching = user_protocol_name.matched_handle;
669 if (user_protocol_name.nb_match > 1) {
670 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
674 /* OK, check whether the problem is that there isn't any such
675 protocol, or that there is but it's not specified as a protocol
676 that's valid for that dissector table.
677 Note, we don't exit here, but dissector_matching will remain NULL,
679 if (proto_get_id_by_filter_name(dissector_str) == -1) {
680 /* No such protocol */
681 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
683 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
684 dissector_str, table_name);
689 if (!dissector_matching) {
690 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
691 fprint_all_protocols_for_layer_types(stderr, table_name);
692 g_free(decoded_param);
696 /* This is the end of the code that parses the command-line options.
697 All information is now stored in the variables:
701 The above variables that are strings are still pointing to areas within
702 decoded_parm. decoded_parm thus still needs to be kept allocated in
703 until we stop needing these variables
704 decoded_param will be deallocated at each exit point of this function */
707 /* We now have a pointer to the handle for the requested dissector
708 (requested protocol) inside the variable dissector_matching */
709 switch (dissector_table_selector_type) {
715 /* The selector for this table is an unsigned number. */
716 dissector_change_uint(table_name, selector, dissector_matching);
721 /* The selector for this table is a string. */
722 dissector_change_string(table_name, selector_str, dissector_matching);
726 /* There are currently no dissector tables with any types other
727 than the ones listed above. */
728 g_assert_not_reached();
730 g_free(decoded_param); /* "Decode As" rule has been successfully added */
735 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
736 const gchar *message, gpointer user_data)
738 /* ignore log message, if log_level isn't interesting based
739 upon the console log preferences.
740 If the preferences haven't been loaded loaded yet, display the
743 The default console_log_level preference value is such that only
744 ERROR, CRITICAL and WARNING level messages are processed;
745 MESSAGE, INFO and DEBUG level messages are ignored.
747 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
748 ERROR and CRITICAL level messages so the current code is a behavioral
749 change. The current behavior is the same as in Wireshark.
751 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
752 prefs.console_log_level != 0) {
756 g_log_default_handler(log_domain, log_level, message, user_data);
761 output_file_description(const char *fname)
763 char *save_file_string;
765 /* Get a string that describes what we're writing to */
766 if (strcmp(fname, "-") == 0) {
767 /* We're writing to the standard output */
768 save_file_string = g_strdup("standard output");
770 /* We're writing to a file with the name in save_file */
771 save_file_string = g_strdup_printf("file \"%s\"", fname);
773 return save_file_string;
777 print_current_user(void) {
778 gchar *cur_user, *cur_group;
779 if (started_with_special_privs()) {
780 cur_user = get_cur_username();
781 cur_group = get_cur_groupname();
782 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
783 cur_user, cur_group);
786 if (running_with_special_privs()) {
787 fprintf(stderr, " This could be dangerous.");
789 fprintf(stderr, "\n");
794 check_capture_privs(void) {
797 /* Warn the user if npf.sys isn't loaded. */
798 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
799 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
800 "capturing or\nlisting interfaces.\n");
806 show_version(GString *comp_info_str, GString *runtime_info_str)
808 printf("TShark " VERSION "%s\n"
815 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
816 runtime_info_str->str);
820 main(int argc, char *argv[])
822 char *init_progfile_dir_error;
824 gboolean arg_error = FALSE;
830 char *gpf_path, *pf_path;
831 char *gdp_path, *dp_path;
832 int gpf_open_errno, gpf_read_errno;
833 int pf_open_errno, pf_read_errno;
834 int gdp_open_errno, gdp_read_errno;
835 int dp_open_errno, dp_read_errno;
837 volatile int exit_status = 0;
839 gboolean list_link_layer_types = FALSE;
840 gboolean start_capture = FALSE;
845 interface_options interface_opts;
847 gboolean capture_option_specified = FALSE;
849 gboolean quiet = FALSE;
850 #ifdef PCAP_NG_DEFAULT
851 volatile int out_file_type = WTAP_FILE_PCAPNG;
853 volatile int out_file_type = WTAP_FILE_PCAP;
855 volatile gboolean out_file_name_res = FALSE;
856 gchar *volatile cf_name = NULL;
857 gchar *rfilter = NULL;
858 #ifdef HAVE_PCAP_OPEN_DEAD
859 struct bpf_program fcode;
861 dfilter_t *rfcode = NULL;
864 GLogLevelFlags log_flags;
866 gchar *output_only = NULL;
868 #ifdef HAVE_PCAP_REMOTE
869 #define OPTSTRING_A "A:"
871 #define OPTSTRING_A ""
874 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
875 #define OPTSTRING_B "B:"
877 #define OPTSTRING_B ""
878 #endif /* _WIN32 or HAVE_PCAP_CREATE */
879 #else /* HAVE_LIBPCAP */
880 #define OPTSTRING_B ""
881 #endif /* HAVE_LIBPCAP */
883 #ifdef HAVE_PCAP_CREATE
884 #define OPTSTRING_I "I"
886 #define OPTSTRING_I ""
889 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:S:t:T:u:vVw:W:xX:y:z:"
891 static const char optstring[] = OPTSTRING;
894 arg_list_utf_16to8(argc, argv);
895 #if !GLIB_CHECK_VERSION(2,31,0)
901 * Get credential information for later use.
903 init_process_policies();
906 * Attempt to get the pathname of the executable file.
908 init_progfile_dir_error = init_progfile_dir(argv[0], main);
909 if (init_progfile_dir_error != NULL) {
910 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
911 init_progfile_dir_error);
915 * In order to have the -X opts assigned before the wslua machine starts
916 * we need to call getopts before epan_init() gets called.
919 optind_initial = optind;
921 while ((opt = getopt(argc, argv, optstring)) != -1) {
923 case 'C': /* Configuration Profile */
924 if (profile_exists (optarg, FALSE)) {
925 set_profile_name (optarg);
927 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
931 case 'P': /* Print packet summary info even when writing to a file */
932 print_packet_info = TRUE;
933 print_summary = TRUE;
935 case 'O': /* Only output these protocols */
936 output_only = g_strdup(optarg);
938 case 'V': /* Verbose */
939 print_details = TRUE;
940 print_packet_info = TRUE;
942 case 'x': /* Print packet data in hex (and ASCII) */
944 /* The user asked for hex output, so let's ensure they get it,
945 * even if they're writing to a file.
947 print_packet_info = TRUE;
958 * Print packet summary information is the default, unless either -V or -x
959 * were specified and -P was not. Note that this is new behavior, which
960 * allows for the possibility of printing only hex/ascii output without
961 * necessarily requiring that either the summary or details be printed too.
963 if (print_summary == -1)
964 print_summary = (print_details || print_hex) ? FALSE : TRUE;
966 optind = optind_initial;
971 /** Send All g_log messages to our own handler **/
975 G_LOG_LEVEL_CRITICAL|
980 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
982 g_log_set_handler(NULL,
984 tshark_log_handler, NULL /* user_data */);
985 g_log_set_handler(LOG_DOMAIN_MAIN,
987 tshark_log_handler, NULL /* user_data */);
990 g_log_set_handler(LOG_DOMAIN_CAPTURE,
992 tshark_log_handler, NULL /* user_data */);
993 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
995 tshark_log_handler, NULL /* user_data */);
998 initialize_funnel_ops();
1001 capture_opts_init(&global_capture_opts, &cfile);
1004 timestamp_set_type(TS_RELATIVE);
1005 timestamp_set_precision(TS_PREC_AUTO);
1006 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1008 /* Register all dissectors; we must do this before checking for the
1009 "-G" flag, as the "-G" flag dumps information registered by the
1010 dissectors, and we must do it before we read the preferences, in
1011 case any dissectors register preferences. */
1012 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1013 failure_message, open_failure_message, read_failure_message,
1014 write_failure_message);
1016 /* Register all tap listeners; we do this before we parse the arguments,
1017 as the "-z" argument can specify a registered tap. */
1019 /* we register the plugin taps before the other taps because
1020 stats_tree taps plugins will be registered as tap listeners
1021 by stats_tree_stat.c and need to registered before that */
1023 register_all_plugin_tap_listeners();
1025 register_all_tap_listeners();
1027 /* If invoked with the "-G" flag, we dump out information based on
1028 the argument to the "-G" flag; if no argument is specified,
1029 for backwards compatibility we dump out a glossary of display
1032 XXX - we do this here, for now, to support "-G" with no arguments.
1033 If none of our build or other processes uses "-G" with no arguments,
1034 we can just process it with the other arguments. */
1035 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1036 proto_initialize_all_prefixes();
1039 proto_registrar_dump_fields(1);
1041 if (strcmp(argv[2], "fields") == 0)
1042 proto_registrar_dump_fields(1);
1043 else if (strcmp(argv[2], "fields2") == 0)
1044 proto_registrar_dump_fields(2);
1045 else if (strcmp(argv[2], "fields3") == 0)
1046 proto_registrar_dump_fields(3);
1047 else if (strcmp(argv[2], "protocols") == 0)
1048 proto_registrar_dump_protocols();
1049 else if (strcmp(argv[2], "values") == 0)
1050 proto_registrar_dump_values();
1051 else if (strcmp(argv[2], "ftypes") == 0)
1052 proto_registrar_dump_ftypes();
1053 else if (strcmp(argv[2], "decodes") == 0)
1054 dissector_dump_decodes();
1055 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1056 dissector_dump_heur_decodes();
1057 else if (strcmp(argv[2], "defaultprefs") == 0)
1059 else if (strcmp(argv[2], "plugins") == 0)
1061 else if (strcmp(argv[2], "?") == 0)
1062 glossary_option_help();
1063 else if (strcmp(argv[2], "-?") == 0)
1064 glossary_option_help();
1065 else if (strcmp(argv[2], "currentprefs") == 0) {
1066 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1067 &pf_open_errno, &pf_read_errno, &pf_path);
1070 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1077 /* Set the C-language locale to the native environment. */
1078 setlocale(LC_ALL, "");
1080 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1081 &pf_open_errno, &pf_read_errno, &pf_path);
1082 if (gpf_path != NULL) {
1083 if (gpf_open_errno != 0) {
1084 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1085 pf_path, g_strerror(gpf_open_errno));
1087 if (gpf_read_errno != 0) {
1088 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1089 pf_path, g_strerror(gpf_read_errno));
1092 if (pf_path != NULL) {
1093 if (pf_open_errno != 0) {
1094 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1095 g_strerror(pf_open_errno));
1097 if (pf_read_errno != 0) {
1098 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1099 pf_path, g_strerror(pf_read_errno));
1105 /* Read the disabled protocols file. */
1106 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1107 &dp_path, &dp_open_errno, &dp_read_errno);
1108 if (gdp_path != NULL) {
1109 if (gdp_open_errno != 0) {
1110 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1111 gdp_path, g_strerror(gdp_open_errno));
1113 if (gdp_read_errno != 0) {
1114 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1115 gdp_path, g_strerror(gdp_read_errno));
1119 if (dp_path != NULL) {
1120 if (dp_open_errno != 0) {
1122 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1123 g_strerror(dp_open_errno));
1125 if (dp_read_errno != 0) {
1127 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1128 g_strerror(dp_read_errno));
1133 check_capture_privs();
1135 cap_file_init(&cfile);
1137 /* Print format defaults to this. */
1138 print_format = PR_FMT_TEXT;
1140 output_fields = output_fields_new();
1142 /* Now get our args */
1143 while ((opt = getopt(argc, argv, optstring)) != -1) {
1145 case '2': /* Perform two pass analysis */
1146 perform_two_pass_analysis = TRUE;
1148 case 'a': /* autostop criteria */
1149 case 'b': /* Ringbuffer option */
1150 case 'c': /* Capture x packets */
1151 case 'f': /* capture filter */
1152 case 'i': /* Use interface x */
1153 case 'p': /* Don't capture in promiscuous mode */
1154 #ifdef HAVE_PCAP_REMOTE
1155 case 'A': /* Authentication */
1157 #ifdef HAVE_PCAP_CREATE
1158 case 'I': /* Capture in monitor mode, if available */
1160 case 's': /* Set the snapshot (capture) length */
1161 case 'w': /* Write to capture file x */
1162 case 'y': /* Set the pcap data link type */
1163 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1164 case 'B': /* Buffer size */
1165 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1167 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1172 capture_option_specified = TRUE;
1177 /* Configuration profile settings were already processed just ignore them this time*/
1179 case 'd': /* Decode as rule */
1180 if (!add_decode_as(optarg))
1183 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1184 case 'K': /* Kerberos keytab file */
1185 read_keytab_file(optarg);
1188 case 'D': /* Print a list of capture devices and exit */
1190 if_list = capture_interface_list(&err, &err_str);
1191 if (if_list == NULL) {
1193 case CANT_GET_INTERFACE_LIST:
1194 case DONT_HAVE_PCAP:
1195 cmdarg_err("%s", err_str);
1199 case NO_INTERFACES_FOUND:
1200 cmdarg_err("There are no interfaces on which a capture can be done");
1205 capture_opts_print_interfaces(if_list);
1206 free_interface_list(if_list);
1209 capture_option_specified = TRUE;
1215 output_fields_add(output_fields, optarg);
1219 if(!output_fields_set_option(output_fields, optarg)) {
1220 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1221 output_fields_list_options(stderr);
1226 out_file_type = wtap_short_string_to_file_type(optarg);
1227 if (out_file_type < 0) {
1228 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1229 list_capture_types();
1233 case 'W': /* Select extra information to save in our capture file */
1234 /* This is patterned after the -N flag which may not be the best idea. */
1235 if (strchr(optarg, 'n'))
1236 out_file_name_res = TRUE;
1238 case 'H': /* Read address to name mappings from a hosts file */
1239 if (! read_hosts_file(optarg))
1241 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1244 out_file_name_res = TRUE;
1247 case 'h': /* Print help and exit */
1251 case 'l': /* "Line-buffer" standard output */
1252 /* This isn't line-buffering, strictly speaking, it's just
1253 flushing the standard output after the information for
1254 each packet is printed; however, that should be good
1255 enough for all the purposes to which "-l" is put (and
1256 is probably actually better for "-V", as it does fewer
1259 See the comment in "process_packet()" for an explanation of
1260 why we do that, and why we don't just use "setvbuf()" to
1261 make the standard output line-buffered (short version: in
1262 Windows, "line-buffered" is the same as "fully-buffered",
1263 and the output buffer is only flushed when it fills up). */
1264 line_buffered = TRUE;
1266 case 'L': /* Print list of link-layer types and exit */
1268 list_link_layer_types = TRUE;
1270 capture_option_specified = TRUE;
1274 case 'n': /* No name resolution */
1275 gbl_resolv_flags.mac_name = FALSE;
1276 gbl_resolv_flags.network_name = FALSE;
1277 gbl_resolv_flags.transport_name = FALSE;
1278 gbl_resolv_flags.concurrent_dns = FALSE;
1280 case 'N': /* Select what types of addresses/port #s to resolve */
1281 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1282 if (badopt != '\0') {
1283 cmdarg_err("-N specifies unknown resolving option '%c';",
1285 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1289 case 'o': /* Override preference from command line */
1290 switch (prefs_set_pref(optarg)) {
1295 case PREFS_SET_SYNTAX_ERR:
1296 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1300 case PREFS_SET_NO_SUCH_PREF:
1301 case PREFS_SET_OBSOLETE:
1302 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1307 case 'q': /* Quiet */
1310 case 'r': /* Read capture file x */
1311 cf_name = g_strdup(optarg);
1313 case 'R': /* Read file filter */
1317 /* already processed; just ignore it now */
1319 case 'S': /* Set the line Separator to be printed between packets */
1320 separator = strdup(optarg);
1322 case 't': /* Time stamp type */
1323 if (strcmp(optarg, "r") == 0)
1324 timestamp_set_type(TS_RELATIVE);
1325 else if (strcmp(optarg, "a") == 0)
1326 timestamp_set_type(TS_ABSOLUTE);
1327 else if (strcmp(optarg, "ad") == 0)
1328 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1329 else if (strcmp(optarg, "d") == 0)
1330 timestamp_set_type(TS_DELTA);
1331 else if (strcmp(optarg, "dd") == 0)
1332 timestamp_set_type(TS_DELTA_DIS);
1333 else if (strcmp(optarg, "e") == 0)
1334 timestamp_set_type(TS_EPOCH);
1335 else if (strcmp(optarg, "u") == 0)
1336 timestamp_set_type(TS_UTC);
1337 else if (strcmp(optarg, "ud") == 0)
1338 timestamp_set_type(TS_UTC_WITH_DATE);
1340 cmdarg_err("Invalid time stamp type \"%s\"",
1342 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1343 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1347 case 'T': /* printing Type */
1348 if (strcmp(optarg, "text") == 0) {
1349 output_action = WRITE_TEXT;
1350 print_format = PR_FMT_TEXT;
1351 } else if (strcmp(optarg, "ps") == 0) {
1352 output_action = WRITE_TEXT;
1353 print_format = PR_FMT_PS;
1354 } else if (strcmp(optarg, "pdml") == 0) {
1355 output_action = WRITE_XML;
1356 print_details = TRUE; /* Need details */
1357 print_summary = FALSE; /* Don't allow summary */
1358 } else if (strcmp(optarg, "psml") == 0) {
1359 output_action = WRITE_XML;
1360 print_details = FALSE; /* Don't allow details */
1361 print_summary = TRUE; /* Need summary */
1362 } else if(strcmp(optarg, "fields") == 0) {
1363 output_action = WRITE_FIELDS;
1364 print_details = TRUE; /* Need full tree info */
1365 print_summary = FALSE; /* Don't allow summary */
1367 cmdarg_err("Invalid -T parameter.");
1368 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1372 case 'u': /* Seconds type */
1373 if (strcmp(optarg, "s") == 0)
1374 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1375 else if (strcmp(optarg, "hms") == 0)
1376 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1378 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1379 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1383 case 'v': /* Show version and exit */
1385 GString *comp_info_str;
1386 GString *runtime_info_str;
1387 /* Assemble the compile-time version information string */
1388 comp_info_str = g_string_new("Compiled ");
1389 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1391 /* Assemble the run-time version information string */
1392 runtime_info_str = g_string_new("Running ");
1393 get_runtime_version_info(runtime_info_str, NULL);
1394 show_version(comp_info_str, runtime_info_str);
1395 g_string_free(comp_info_str, TRUE);
1396 g_string_free(runtime_info_str, TRUE);
1399 case 'O': /* Only output these protocols */
1400 /* already processed; just ignore it now */
1402 case 'V': /* Verbose */
1403 /* already processed; just ignore it now */
1405 case 'x': /* Print packet data in hex (and ASCII) */
1406 /* already processed; just ignore it now */
1411 /* We won't call the init function for the stat this soon
1412 as it would disallow MATE's fields (which are registered
1413 by the preferences set callback) from being used as
1414 part of a tap filter. Instead, we just add the argument
1415 to a list of stat arguments. */
1416 if (!process_stat_cmd_arg(optarg)) {
1417 cmdarg_err("invalid -z argument.");
1418 cmdarg_err_cont(" -z argument must be one of :");
1419 list_stat_cmd_args();
1424 case '?': /* Bad flag - print usage message */
1427 list_capture_types();
1437 /* If we specified output fields, but not the output field type... */
1438 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1439 cmdarg_err("Output fields were specified with \"-e\", "
1440 "but \"-Tfields\" was not specified.");
1442 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1443 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1444 "specified with \"-e\".");
1449 /* If no capture filter or read filter has been specified, and there are
1450 still command-line arguments, treat them as the tokens of a capture
1451 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1452 flag was specified. */
1453 if (optind < argc) {
1454 if (cf_name != NULL) {
1455 if (rfilter != NULL) {
1456 cmdarg_err("Read filters were specified both with \"-R\" "
1457 "and with additional command-line arguments.");
1460 rfilter = get_args_as_string(argc, argv, optind);
1463 if (global_capture_opts.default_options.cfilter) {
1464 cmdarg_err("A default capture filter was specified both with \"-f\""
1465 " and with additional command-line arguments.");
1468 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1469 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1470 if (interface_opts.cfilter == NULL) {
1471 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1472 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1473 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1475 cmdarg_err("A capture filter was specified both with \"-f\""
1476 " and with additional command-line arguments.");
1480 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1482 capture_option_specified = TRUE;
1488 if (!global_capture_opts.saving_to_file) {
1489 /* We're not saving the capture to a file; if "-q" wasn't specified,
1490 we should print packet information */
1492 print_packet_info = TRUE;
1494 /* We're saving to a file; if we're writing to the standard output.
1495 and we'll also be writing dissected packets to the standard
1496 output, reject the request. At best, we could redirect that
1497 to the standard error; we *can't* write both to the standard
1498 output and have either of them be useful. */
1499 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1500 cmdarg_err("You can't write both raw packet data and dissected packets"
1501 " to the standard output.");
1506 /* We're not saving the capture to a file; if "-q" wasn't specified,
1507 we should print packet information */
1509 print_packet_info = TRUE;
1512 #ifndef HAVE_LIBPCAP
1513 if (capture_option_specified)
1514 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1521 /* We don't support capture filters when reading from a capture file
1522 (the BPF compiler doesn't support all link-layer types that we
1523 support in capture files we read). */
1525 if (cf_name != NULL) {
1526 if (global_capture_opts.default_options.cfilter) {
1527 cmdarg_err("Only read filters, not capture filters, "
1528 "can be specified when reading a capture file.");
1535 if (output_action != WRITE_TEXT) {
1536 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1541 if (output_only != NULL) {
1544 if (!print_details) {
1545 cmdarg_err("-O requires -V");
1549 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1550 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1551 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1556 if (list_link_layer_types) {
1557 /* We're supposed to list the link-layer types for an interface;
1558 did the user also specify a capture file to be read? */
1560 /* Yes - that's bogus. */
1561 cmdarg_err("You can't specify -L and a capture file to be read.");
1564 /* No - did they specify a ring buffer option? */
1565 if (global_capture_opts.multi_files_on) {
1566 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1572 * "-r" was specified, so we're reading a capture file.
1573 * Capture options don't apply here.
1575 if (global_capture_opts.multi_files_on) {
1576 cmdarg_err("Multiple capture files requested, but "
1577 "a capture isn't being done.");
1580 if (global_capture_opts.has_file_duration) {
1581 cmdarg_err("Switching capture files after a time interval was specified, but "
1582 "a capture isn't being done.");
1585 if (global_capture_opts.has_ring_num_files) {
1586 cmdarg_err("A ring buffer of capture files was specified, but "
1587 "a capture isn't being done.");
1590 if (global_capture_opts.has_autostop_files) {
1591 cmdarg_err("A maximum number of capture files was specified, but "
1592 "a capture isn't being done.");
1596 /* Note: TShark now allows the restriction of a _read_ file by packet count
1597 * and byte count as well as a write file. Other autostop options remain valid
1598 * only for a write file.
1600 if (global_capture_opts.has_autostop_duration) {
1601 cmdarg_err("A maximum capture time was specified, but "
1602 "a capture isn't being done.");
1607 * "-r" wasn't specified, so we're doing a live capture.
1609 if (global_capture_opts.saving_to_file) {
1610 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1612 /* When capturing, we only support writing pcap or pcap-ng format. */
1613 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1614 cmdarg_err("Live captures can only be saved in libpcap format.");
1617 if (global_capture_opts.multi_files_on) {
1618 /* Multiple-file mode doesn't work under certain conditions:
1619 a) it doesn't work if you're writing to the standard output;
1620 b) it doesn't work if you're writing to a pipe;
1622 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1623 cmdarg_err("Multiple capture files requested, but "
1624 "the capture is being written to the standard output.");
1627 if (global_capture_opts.output_to_pipe) {
1628 cmdarg_err("Multiple capture files requested, but "
1629 "the capture file is a pipe.");
1632 if (!global_capture_opts.has_autostop_filesize &&
1633 !global_capture_opts.has_file_duration) {
1634 cmdarg_err("Multiple capture files requested, but "
1635 "no maximum capture file size or duration was specified.");
1639 /* Currently, we don't support read filters when capturing
1640 and saving the packets. */
1641 if (rfilter != NULL) {
1642 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1646 /* They didn't specify a "-w" flag, so we won't be saving to a
1647 capture file. Check for options that only make sense if
1648 we're saving to a file. */
1649 if (global_capture_opts.has_autostop_filesize) {
1650 cmdarg_err("Maximum capture file size specified, but "
1651 "capture isn't being saved to a file.");
1654 if (global_capture_opts.multi_files_on) {
1655 cmdarg_err("Multiple capture files requested, but "
1656 "the capture isn't being saved to a file.");
1665 /* Start windows sockets */
1666 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1669 /* Notify all registered modules that have had any of their preferences
1670 changed either from one of the preferences file or from the command
1671 line that their preferences have changed. */
1674 /* At this point MATE will have registered its field array so we can
1675 have a tap filter with one of MATE's late-registered fields as part
1676 of the filter. We can now process all the "-z" arguments. */
1677 start_requested_stats();
1680 /* We currently don't support taps, or printing dissected packets,
1681 if we're writing to a pipe. */
1682 if (global_capture_opts.saving_to_file &&
1683 global_capture_opts.output_to_pipe) {
1684 if (tap_listeners_require_dissection()) {
1685 cmdarg_err("Taps aren't supported when saving to a pipe.");
1688 if (print_packet_info) {
1689 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1695 /* disabled protocols as per configuration file */
1696 if (gdp_path == NULL && dp_path == NULL) {
1697 set_disabled_protos_list();
1700 /* Build the column format array */
1701 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1704 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1705 capture_opts_trim_ring_num_files(&global_capture_opts);
1708 if (rfilter != NULL) {
1709 if (!dfilter_compile(rfilter, &rfcode)) {
1710 cmdarg_err("%s", dfilter_error_msg);
1712 #ifdef HAVE_PCAP_OPEN_DEAD
1716 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1718 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1720 " Note: That display filter code looks like a valid capture filter;");
1722 " maybe you mixed them up?");
1731 cfile.rfcode = rfcode;
1733 if (print_packet_info) {
1734 /* If we're printing as text or PostScript, we have
1735 to create a print stream. */
1736 if (output_action == WRITE_TEXT) {
1737 switch (print_format) {
1740 print_stream = print_stream_text_stdio_new(stdout);
1744 print_stream = print_stream_ps_stdio_new(stdout);
1748 g_assert_not_reached();
1753 /* We have to dissect each packet if:
1755 we're printing information about each packet;
1757 we're using a read filter on the packets;
1759 we're using any taps that need dissection. */
1760 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1764 * We're reading a capture file.
1768 * Immediately relinquish any special privileges we have; we must not
1769 * be allowed to read any capture files the user running TShark
1772 relinquish_special_privs_perm();
1773 print_current_user();
1775 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1780 /* Set timestamp precision; there should arguably be a command-line
1781 option to let the user set this. */
1782 switch(wtap_file_tsprecision(cfile.wth)) {
1783 case(WTAP_FILE_TSPREC_SEC):
1784 timestamp_set_precision(TS_PREC_AUTO_SEC);
1786 case(WTAP_FILE_TSPREC_DSEC):
1787 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1789 case(WTAP_FILE_TSPREC_CSEC):
1790 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1792 case(WTAP_FILE_TSPREC_MSEC):
1793 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1795 case(WTAP_FILE_TSPREC_USEC):
1796 timestamp_set_precision(TS_PREC_AUTO_USEC);
1798 case(WTAP_FILE_TSPREC_NSEC):
1799 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1802 g_assert_not_reached();
1805 /* Process the packets in the file */
1808 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1809 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1810 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1812 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1815 CATCH(OutOfMemoryError) {
1819 "Sorry, but TShark has to terminate now!\n"
1821 "Some infos / workarounds can be found at:\n"
1822 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1827 /* We still dump out the results of taps, etc., as we might have
1828 read some packets; however, we exit with an error status. */
1832 /* No capture file specified, so we're supposed to do a live capture
1833 (or get a list of link-layer types for a live capture device);
1834 do we have support for live captures? */
1836 /* trim the interface name and exit if that failed */
1837 if (!capture_opts_trim_iface(&global_capture_opts,
1838 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL)) {
1842 /* if requested, list the link layer types and exit */
1843 if (list_link_layer_types) {
1845 interface_options interface_opts;
1847 /* Get the list of link-layer types for the capture devices. */
1848 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1849 if_capabilities_t *caps;
1851 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1852 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1854 cmdarg_err("%s", err_str);
1858 if (caps->data_link_types == NULL) {
1859 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1862 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1863 free_if_capabilities(caps);
1868 if (print_packet_info) {
1869 if (!write_preamble(NULL)) {
1870 show_print_file_io_error(errno);
1873 } else if (!quiet) {
1875 * We're not printing information for each packet, and the user
1876 * didn't ask us not to print a count of packets as they arrive,
1877 * so print that count so the user knows that packets are arriving.
1879 * XXX - what if the user wants to do a live capture, doesn't want
1880 * to save it to a file, doesn't want information printed for each
1881 * packet, does want some "-z" statistic, and wants packet counts
1882 * so they know whether they're seeing any packets?
1884 print_packet_counts = TRUE;
1887 /* For now, assume libpcap gives microsecond precision. */
1888 timestamp_set_precision(TS_PREC_AUTO_USEC);
1891 * XXX - this returns FALSE if an error occurred, but it also
1892 * returns FALSE if the capture stops because a time limit
1893 * was reached (and possibly other limits), so we can't assume
1894 * it means an error.
1896 * The capture code is a bit twisty, so it doesn't appear to
1897 * be an easy fix. We just ignore the return value for now.
1898 * Instead, pass on the exit status from the capture child.
1901 exit_status = global_capture_opts.fork_child_status;
1903 if (print_packet_info) {
1904 if (!write_finale()) {
1906 show_print_file_io_error(err);
1910 /* No - complain. */
1911 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1918 if (cfile.frames != NULL) {
1919 free_frame_data_sequence(cfile.frames);
1920 cfile.frames = NULL;
1923 draw_tap_listeners(TRUE);
1924 funnel_dump_all_text_windows();
1927 output_fields_free(output_fields);
1928 output_fields = NULL;
1933 /*#define USE_BROKEN_G_MAIN_LOOP*/
1935 #ifdef USE_BROKEN_G_MAIN_LOOP
1938 gboolean loop_running = FALSE;
1940 guint32 packet_count = 0;
1943 /* XXX - move to the right position / file */
1944 /* read from a pipe (callback) */
1945 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1947 typedef struct pipe_input_tag {
1951 pipe_input_cb_t input_cb;
1952 guint pipe_input_id;
1954 GMutex *callback_running;
1958 static pipe_input_t pipe_input;
1961 /* The timer has expired, see if there's stuff to read from the pipe,
1962 if so, do the callback */
1964 pipe_timer_cb(gpointer data)
1970 pipe_input_t *pipe_input_p = data;
1971 gint iterations = 0;
1973 g_mutex_lock (pipe_input_p->callback_running);
1975 /* try to read data from the pipe only 5 times, to avoid blocking */
1976 while(iterations < 5) {
1977 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1979 /* Oddly enough although Named pipes don't work on win9x,
1980 PeekNamedPipe does !!! */
1981 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1982 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1984 /* Get the child process exit status */
1985 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1988 /* If the Peek returned an error, or there are bytes to be read
1989 or the childwatcher thread has terminated then call the normal
1991 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1993 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1995 /* And call the real handler */
1996 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1997 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1998 /* pipe closed, return false so that the timer is stopped */
1999 g_mutex_unlock (pipe_input_p->callback_running);
2004 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2005 /* No data, stop now */
2012 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2014 g_mutex_unlock (pipe_input_p->callback_running);
2016 /* we didn't stopped the timer, so let it run */
2023 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2026 pipe_input.source = source;
2027 pipe_input.child_process = child_process;
2028 pipe_input.user_data = user_data;
2029 pipe_input.input_cb = input_cb;
2032 #if GLIB_CHECK_VERSION(2,31,0)
2033 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2034 g_mutex_init(pipe_input.callback_running);
2036 pipe_input.callback_running = g_mutex_new();
2038 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2039 do this but that doesn't cover all win32 platforms. GTK can do
2040 this but doesn't seem to work over processes. Attempt to do
2041 something similar here, start a timer and check for data on every
2043 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2044 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2055 GString *str = g_string_new("");
2056 #ifdef USE_TSHARK_SELECT
2060 struct sigaction action, oldaction;
2064 * XXX - dropping privileges is still required, until code cleanup is done
2066 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2067 * when it's done, we don't need special privileges to run tshark at all,
2068 * therefore we don't need to drop these privileges
2069 * The only thing we might want to keep is a warning if tshark is run as root,
2070 * as it's no longer necessary and potentially dangerous.
2072 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2073 * We've opened the capture device, so we shouldn't need any special
2074 * privileges any more; relinquish those privileges.
2076 * XXX - if we have saved set-user-ID support, we should give up those
2077 * privileges immediately, and then reclaim them long enough to get
2078 * a list of network interfaces and to open one, and then give them
2079 * up again, so that stuff we do while processing the argument list,
2080 * reading the user's preferences, loading and starting plugins
2081 * (especially *user* plugins), etc. is done with the user's privileges,
2082 * not special privileges.
2084 relinquish_special_privs_perm();
2085 print_current_user();
2087 /* Cleanup all data structures used for dissection. */
2088 cleanup_dissection();
2089 /* Initialize all data structures used for dissection. */
2093 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2094 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2096 /* Catch SIGINT and SIGTERM and, if we get either of them,
2097 clean up and exit. If SIGHUP isn't being ignored, catch
2098 it too and, if we get it, clean up and exit.
2100 We restart any read that was in progress, so that it doesn't
2101 disrupt reading from the sync pipe. The signal handler tells
2102 the capture child to finish; it will report that it finished,
2103 or will exit abnormally, so we'll stop reading from the sync
2104 pipe, pick up the exit status, and quit. */
2105 memset(&action, 0, sizeof(action));
2106 action.sa_handler = capture_cleanup;
2107 action.sa_flags = SA_RESTART;
2108 sigemptyset(&action.sa_mask);
2109 sigaction(SIGTERM, &action, NULL);
2110 sigaction(SIGINT, &action, NULL);
2111 sigaction(SIGHUP, NULL, &oldaction);
2112 if (oldaction.sa_handler == SIG_DFL)
2113 sigaction(SIGHUP, &action, NULL);
2116 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2117 quiet mode, report the number of packets we've captured.
2119 Again, restart any read that was in progress, so that it doesn't
2120 disrupt reading from the sync pipe. */
2121 action.sa_handler = report_counts_siginfo;
2122 action.sa_flags = SA_RESTART;
2123 sigemptyset(&action.sa_mask);
2124 sigaction(SIGINFO, &action, NULL);
2125 #endif /* SIGINFO */
2128 global_capture_opts.state = CAPTURE_PREPARING;
2130 /* Let the user know which interfaces were chosen. */
2131 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2132 interface_options interface_opts;
2134 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2135 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2136 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2137 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2140 if (global_capture_opts.ifaces->len < 2) {
2142 if (global_capture_opts.ifaces->len < 4) {
2144 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2145 interface_options interface_opts;
2147 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2149 if (global_capture_opts.ifaces->len > 2) {
2150 g_string_append_printf(str, ",");
2152 g_string_append_printf(str, " ");
2153 if (i == global_capture_opts.ifaces->len - 1) {
2154 g_string_append_printf(str, "and ");
2157 g_string_append_printf(str, "%s", interface_opts.descr);
2160 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2162 fprintf(stderr, "Capturing on %s\n", str->str);
2163 g_string_free(str, TRUE);
2165 ret = sync_pipe_start(&global_capture_opts);
2170 /* the actual capture loop
2172 * XXX - glib doesn't seem to provide any event based loop handling.
2174 * XXX - for whatever reason,
2175 * calling g_main_loop_new() ends up in 100% cpu load.
2177 * But that doesn't matter: in UNIX we can use select() to find an input
2178 * source with something to do.
2180 * But that doesn't matter because we're in a CLI (that doesn't need to
2181 * update a GUI or something at the same time) so it's OK if we block
2182 * trying to read from the pipe.
2184 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2185 * wrong (but I leave it there in case I am...).
2188 #ifdef USE_TSHARK_SELECT
2190 FD_SET(pipe_input.source, &readfds);
2193 loop_running = TRUE;
2197 while (loop_running)
2199 #ifdef USE_TSHARK_SELECT
2200 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2206 } else if (ret == 1) {
2208 /* Call the real handler */
2209 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2210 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2213 #ifdef USE_TSHARK_SELECT
2218 CATCH(OutOfMemoryError) {
2222 "Sorry, but TShark has to terminate now!\n"
2224 "Some infos / workarounds can be found at:\n"
2225 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2233 /* XXX - move the call to main_window_update() out of capture_sync.c */
2234 /* dummy for capture_sync.c to make linker happy */
2235 void main_window_update(void)
2239 /* capture child detected an error */
2241 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2243 cmdarg_err("%s", error_msg);
2244 cmdarg_err_cont("%s", secondary_error_msg);
2248 /* capture child detected an capture filter related error */
2250 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2252 dfilter_t *rfcode = NULL;
2253 interface_options interface_opts;
2255 g_assert(i < capture_opts->ifaces->len);
2256 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2258 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2260 "Invalid capture filter \"%s\" for interface %s!\n"
2262 "That string looks like a valid display filter; however, it isn't a valid\n"
2263 "capture filter (%s).\n"
2265 "Note that display filters and capture filters don't have the same syntax,\n"
2266 "so you can't use most display filter expressions as capture filters.\n"
2268 "See the User's Guide for a description of the capture filter syntax.",
2269 interface_opts.cfilter, interface_opts.descr, error_message);
2270 dfilter_free(rfcode);
2273 "Invalid capture filter \"%s\" for interface %s!\n"
2275 "That string isn't a valid capture filter (%s).\n"
2276 "See the User's Guide for a description of the capture filter syntax.",
2277 interface_opts.cfilter, interface_opts.descr, error_message);
2282 /* capture child tells us we have a new (or the first) capture file */
2284 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2286 gboolean is_tempfile;
2289 if(capture_opts->state == CAPTURE_PREPARING) {
2290 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2292 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2294 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2296 /* free the old filename */
2297 if (capture_opts->save_file != NULL) {
2299 /* we start a new capture file, close the old one (if we had one before) */
2300 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2301 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2302 wtap_close(((capture_file *) capture_opts->cf)->wth);
2304 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2307 g_free(capture_opts->save_file);
2308 is_tempfile = FALSE;
2310 /* we didn't had a save_file before, must be a tempfile */
2314 /* save the new filename */
2315 capture_opts->save_file = g_strdup(new_file);
2317 /* if we are in real-time mode, open the new file now */
2319 /* Attempt to open the capture file and set up to read from it. */
2320 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2324 /* Don't unlink (delete) the save file - leave it around,
2325 for debugging purposes. */
2326 g_free(capture_opts->save_file);
2327 capture_opts->save_file = NULL;
2332 capture_opts->state = CAPTURE_RUNNING;
2338 /* capture child tells us we have new packets to read */
2340 capture_input_new_packets(capture_options *capture_opts, int to_read)
2346 capture_file *cf = capture_opts->cf;
2347 gboolean filtering_tap_listeners;
2352 * Prevent a SIGINFO handler from writing to the standard error while
2353 * we're doing so or writing to the standard output; instead, have it
2354 * just set a flag telling us to print that information when we're done.
2357 #endif /* SIGINFO */
2359 /* Do we have any tap listeners with filters? */
2360 filtering_tap_listeners = have_filtering_tap_listeners();
2362 /* Get the union of the flags for all tap listeners. */
2363 tap_flags = union_of_tap_listener_flags();
2366 while (to_read-- && cf->wth) {
2367 wtap_cleareof(cf->wth);
2368 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2370 /* read from file failed, tell the capture child to stop */
2371 sync_pipe_stop(capture_opts);
2372 wtap_close(cf->wth);
2375 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2376 wtap_buf_ptr(cf->wth),
2377 filtering_tap_listeners, tap_flags);
2380 /* packet successfully read and gone through the "Read Filter" */
2386 * Dumpcap's doing all the work; we're not doing any dissection.
2387 * Count all the packets it wrote.
2389 packet_count += to_read;
2392 if (print_packet_counts) {
2393 /* We're printing packet counts. */
2394 if (packet_count != 0) {
2395 fprintf(stderr, "\r%u ", packet_count);
2396 /* stderr could be line buffered */
2403 * Allow SIGINFO handlers to write.
2408 * If a SIGINFO handler asked us to write out capture counts, do so.
2412 #endif /* SIGINFO */
2418 if (!print_packet_counts) {
2419 /* Report the count only if we aren't printing a packet count
2420 as packets arrive. */
2421 fprintf(stderr, "%u packet%s captured\n", packet_count,
2422 plurality(packet_count, "", "s"));
2425 infoprint = FALSE; /* we just reported it */
2426 #endif /* SIGINFO */
2431 report_counts_siginfo(int signum _U_)
2433 int sav_errno = errno;
2434 /* If we've been told to delay printing, just set a flag asking
2435 that we print counts (if we're supposed to), otherwise print
2436 the count of packets captured (if we're supposed to). */
2443 #endif /* SIGINFO */
2446 /* capture child detected any packet drops? */
2448 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2450 if (print_packet_counts) {
2451 /* We're printing packet counts to stderr.
2452 Send a newline so that we move to the line after the packet count. */
2453 fprintf(stderr, "\n");
2457 /* We're printing packet counts to stderr.
2458 Send a newline so that we move to the line after the packet count. */
2459 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2465 * Capture child closed its side of the pipe, report any error and
2466 * do the required cleanup.
2469 capture_input_closed(capture_options *capture_opts, gchar *msg)
2471 capture_file *cf = (capture_file *) capture_opts->cf;
2474 fprintf(stderr, "tshark: %s\n", msg);
2478 if(cf != NULL && cf->wth != NULL) {
2479 wtap_close(cf->wth);
2480 if(cf->is_tempfile) {
2481 ws_unlink(cf->filename);
2484 #ifdef USE_BROKEN_G_MAIN_LOOP
2485 /*g_main_loop_quit(loop);*/
2488 loop_running = FALSE;
2497 capture_cleanup(DWORD ctrltype _U_)
2499 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2500 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2501 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2502 like SIGTERM at least when the machine's shutting down.
2504 For now, we handle them all as indications that we should clean up
2505 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2508 We must return TRUE so that no other handler - such as one that would
2509 terminate the process - gets called.
2511 XXX - for some reason, typing ^C to TShark, if you run this in
2512 a Cygwin console window in at least some versions of Cygwin,
2513 causes TShark to terminate immediately; this routine gets
2514 called, but the main loop doesn't get a chance to run and
2515 exit cleanly, at least if this is compiled with Microsoft Visual
2516 C++ (i.e., it's a property of the Cygwin console window or Bash;
2517 it happens if TShark is not built with Cygwin - for all I know,
2518 building it with Cygwin may make the problem go away). */
2520 /* tell the capture child to stop */
2521 sync_pipe_stop(&global_capture_opts);
2523 /* don't stop our own loop already here, otherwise status messages and
2524 * cleanup wouldn't be done properly. The child will indicate the stop of
2525 * everything by calling capture_input_closed() later */
2531 capture_cleanup(int signum _U_)
2533 /* tell the capture child to stop */
2534 sync_pipe_stop(&global_capture_opts);
2536 /* don't stop our own loop already here, otherwise status messages and
2537 * cleanup wouldn't be done properly. The child will indicate the stop of
2538 * everything by calling capture_input_closed() later */
2541 #endif /* HAVE_LIBPCAP */
2544 process_packet_first_pass(capture_file *cf,
2545 gint64 offset, struct wtap_pkthdr *whdr,
2550 gboolean create_proto_tree = FALSE;
2554 /* The frame number of this packet is one more than the count of
2555 frames in this packet. */
2556 framenum = cf->count + 1;
2558 /* If we're not running a display filter and we're not printing any
2559 packet information, we don't need to do a dissection. This means
2560 that all packets can be marked as 'passed'. */
2563 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2565 /* If we're going to print packet information, or we're going to
2566 run a read filter, or we're going to process taps, set up to
2567 do a dissection and do so. */
2568 if (do_dissection) {
2569 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2570 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2571 /* Grab any resolved addresses */
2572 host_name_lookup_process();
2574 /* If we're going to be applying a read filter, we'll need to
2575 create a protocol tree against which to apply the filter. */
2577 create_proto_tree = TRUE;
2579 /* We're not going to display the protocol tree on this pass,
2580 so it's not going to be "visible". */
2581 epan_dissect_init(&edt, create_proto_tree, FALSE);
2583 /* If we're running a read filter, prime the epan_dissect_t with that
2586 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2588 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2589 &first_ts, prev_dis, prev_cap);
2591 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2593 /* Run the read filter if we have one. */
2595 passed = dfilter_apply_edt(cf->rfcode, &edt);
2599 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2600 prev_dis_frame = fdlocal;
2601 prev_dis = &prev_dis_frame;
2602 frame_data_sequence_add(cf->frames, &fdlocal);
2606 prev_cap_frame = fdlocal;
2607 prev_cap = &prev_cap_frame;
2610 epan_dissect_cleanup(&edt);
2616 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2617 struct wtap_pkthdr *phdr, const guchar *pd,
2618 gboolean filtering_tap_listeners, guint tap_flags)
2620 gboolean create_proto_tree;
2625 /* If we're not running a display filter and we're not printing any
2626 packet information, we don't need to do a dissection. This means
2627 that all packets can be marked as 'passed'. */
2630 /* If we're going to print packet information, or we're going to
2631 run a read filter, or we're going to process taps, set up to
2632 do a dissection and do so. */
2633 if (do_dissection) {
2634 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2635 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2636 /* Grab any resolved addresses */
2637 host_name_lookup_process();
2639 if (cf->rfcode || print_details || filtering_tap_listeners ||
2640 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2641 create_proto_tree = TRUE;
2643 create_proto_tree = FALSE;
2645 /* The protocol tree will be "visible", i.e., printed, only if we're
2646 printing packet details, which is true if we're printing stuff
2647 ("print_packet_info" is true) and we're in verbose mode
2648 ("packet_details" is true). */
2649 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2651 /* If we're running a read filter, prime the epan_dissect_t with that
2654 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2656 col_custom_prime_edt(&edt, &cf->cinfo);
2658 /* We only need the columns if either
2659 1) some tap needs the columns
2661 2) we're printing packet info but we're *not* verbose; in verbose
2662 mode, we print the protocol tree, not the protocol summary.
2664 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2669 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2671 /* Run the read filter if we have one. */
2673 passed = dfilter_apply_edt(cf->rfcode, &edt);
2677 /* Process this packet. */
2678 if (print_packet_info) {
2679 /* We're printing packet information; print the information for
2682 print_packet(cf, &edt);
2684 print_packet(cf, NULL);
2686 /* The ANSI C standard does not appear to *require* that a line-buffered
2687 stream be flushed to the host environment whenever a newline is
2688 written, it just says that, on such a stream, characters "are
2689 intended to be transmitted to or from the host environment as a
2690 block when a new-line character is encountered".
2692 The Visual C++ 6.0 C implementation doesn't do what is intended;
2693 even if you set a stream to be line-buffered, it still doesn't
2694 flush the buffer at the end of every line.
2696 So, if the "-l" flag was specified, we flush the standard output
2697 at the end of a packet. This will do the right thing if we're
2698 printing packet summary lines, and, as we print the entire protocol
2699 tree for a single packet without waiting for anything to happen,
2700 it should be as good as line-buffered mode if we're printing
2701 protocol trees. (The whole reason for the "-l" flag in either
2702 tcpdump or TShark is to allow the output of a live capture to
2703 be piped to a program or script and to have that script see the
2704 information for the packet as soon as it's printed, rather than
2705 having to wait until a standard I/O buffer fills up. */
2709 if (ferror(stdout)) {
2710 show_print_file_io_error(errno);
2716 if (do_dissection) {
2717 epan_dissect_cleanup(&edt);
2723 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2724 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2727 int snapshot_length;
2731 gchar *err_info = NULL;
2733 char *save_file_string = NULL;
2734 gboolean filtering_tap_listeners;
2736 wtapng_section_t *shb_hdr;
2737 wtapng_iface_descriptions_t *idb_inf;
2740 shb_hdr = wtap_file_get_shb_info(cf->wth);
2741 idb_inf = wtap_file_get_idb_info(cf->wth);
2742 #ifdef PCAP_NG_DEFAULT
2743 if (idb_inf->number_of_interfaces > 0) {
2744 linktype = WTAP_ENCAP_PER_PACKET;
2746 linktype = wtap_file_encap(cf->wth);
2749 linktype = wtap_file_encap(cf->wth);
2751 if (save_file != NULL) {
2752 /* Get a string that describes what we're writing to */
2753 save_file_string = output_file_description(save_file);
2755 /* Set up to write to the capture file. */
2756 snapshot_length = wtap_snapshot_length(cf->wth);
2757 if (snapshot_length == 0) {
2758 /* Snapshot length of input file not known. */
2759 snapshot_length = WTAP_MAX_PACKET_SIZE;
2761 /* If we don't have an application name add Tshark */
2762 if(shb_hdr->shb_user_appl == NULL) {
2763 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2764 shb_hdr->shb_user_appl = appname;
2767 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2768 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2774 /* We couldn't set up to write to the capture file. */
2777 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2778 cmdarg_err("Capture files can't be written in that format.");
2781 case WTAP_ERR_UNSUPPORTED_ENCAP:
2782 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2783 cmdarg_err("The capture file being read can't be written as a "
2784 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2787 case WTAP_ERR_CANT_OPEN:
2788 cmdarg_err("The %s couldn't be created for some "
2789 "unknown reason.", save_file_string);
2792 case WTAP_ERR_SHORT_WRITE:
2793 cmdarg_err("A full header couldn't be written to the %s.",
2798 cmdarg_err("The %s could not be created: %s.", save_file_string,
2799 wtap_strerror(err));
2805 if (print_packet_info) {
2806 if (!write_preamble(cf)) {
2808 show_print_file_io_error(err);
2815 if (pdh && out_file_name_res) {
2816 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2817 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2818 wtap_file_type_short_string(out_file_type));
2822 /* Do we have any tap listeners with filters? */
2823 filtering_tap_listeners = have_filtering_tap_listeners();
2825 /* Get the union of the flags for all tap listeners. */
2826 tap_flags = union_of_tap_listener_flags();
2828 if (perform_two_pass_analysis) {
2830 int old_max_packet_count = max_packet_count;
2832 /* Allocate a frame_data_sequence for all the frames. */
2833 cf->frames = new_frame_data_sequence();
2835 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2836 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2837 wtap_buf_ptr(cf->wth))) {
2838 /* Stop reading if we have the maximum number of packets;
2839 * When the -c option has not been used, max_packet_count
2840 * starts at 0, which practically means, never stop reading.
2841 * (unless we roll over max_packet_count ?)
2843 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2844 err = 0; /* This is not an error */
2850 /* Close the sequential I/O side, to free up memory it requires. */
2851 wtap_sequential_close(cf->wth);
2853 /* Allow the protocol dissectors to free up memory that they
2854 * don't need after the sequential run-through of the packets. */
2855 postseq_cleanup_all_protocols();
2857 max_packet_count = old_max_packet_count;
2859 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2860 fdata = frame_data_sequence_find(cf->frames, framenum);
2861 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2862 cf->pd, fdata->cap_len, &err, &err_info)) {
2863 if (process_packet_second_pass(cf, fdata,
2865 filtering_tap_listeners, tap_flags)) {
2866 /* Either there's no read filtering or this packet passed the
2867 filter, so, if we're writing to a capture file, write
2870 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2871 /* Error writing to a capture file */
2874 case WTAP_ERR_UNSUPPORTED_ENCAP:
2876 * This is a problem with the particular frame we're writing;
2877 * note that, and give the frame number.
2879 * XXX - framenum is not necessarily the frame number in
2880 * the input file if there was a read filter.
2883 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2884 framenum, cf->filename,
2885 wtap_file_type_short_string(out_file_type));
2889 show_capture_file_io_error(save_file, err, FALSE);
2892 wtap_dump_close(pdh, &err);
2897 /* Stop reading if we have the maximum number of packets;
2898 * When the -c option has not been used, max_packet_count
2899 * starts at 0, which practically means, never stop reading.
2900 * (unless we roll over max_packet_count ?)
2902 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2903 err = 0; /* This is not an error */
2912 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2915 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2916 wtap_buf_ptr(cf->wth),
2917 filtering_tap_listeners, tap_flags)) {
2918 /* Either there's no read filtering or this packet passed the
2919 filter, so, if we're writing to a capture file, write
2922 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2923 /* Error writing to a capture file */
2926 case WTAP_ERR_UNSUPPORTED_ENCAP:
2928 * This is a problem with the particular frame we're writing;
2929 * note that, and give the frame number.
2932 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2933 framenum, cf->filename,
2934 wtap_file_type_short_string(out_file_type));
2938 show_capture_file_io_error(save_file, err, FALSE);
2941 wtap_dump_close(pdh, &err);
2946 /* Stop reading if we have the maximum number of packets;
2947 * When the -c option has not been used, max_packet_count
2948 * starts at 0, which practically means, never stop reading.
2949 * (unless we roll over max_packet_count ?)
2951 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2952 err = 0; /* This is not an error */
2961 * Print a message noting that the read failed somewhere along the line.
2963 * If we're printing packet data, and the standard output and error are
2964 * going to the same place, flush the standard output, so everything
2965 * buffered up is written, and then print a newline to the standard error
2966 * before printing the error message, to separate it from the packet
2967 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2968 * the _fstat() documentation at Microsoft doesn't indicate whether
2969 * st_ino is even supported.)
2972 if (print_packet_info) {
2973 struct stat stat_stdout, stat_stderr;
2975 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2976 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2977 stat_stdout.st_ino == stat_stderr.st_ino) {
2979 fprintf(stderr, "\n");
2986 case WTAP_ERR_UNSUPPORTED:
2987 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
2988 cf->filename, err_info);
2992 case WTAP_ERR_UNSUPPORTED_ENCAP:
2993 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2994 cf->filename, err_info);
2998 case WTAP_ERR_CANT_READ:
2999 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3003 case WTAP_ERR_SHORT_READ:
3004 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3008 case WTAP_ERR_BAD_FILE:
3009 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3010 cf->filename, err_info);
3014 case WTAP_ERR_DECOMPRESS:
3015 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3016 "(%s)", cf->filename, err_info);
3020 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3021 cf->filename, wtap_strerror(err));
3024 if (save_file != NULL) {
3025 /* Now close the capture file. */
3026 if (!wtap_dump_close(pdh, &err))
3027 show_capture_file_io_error(save_file, err, TRUE);
3030 if (save_file != NULL) {
3031 /* Now close the capture file. */
3032 if (!wtap_dump_close(pdh, &err))
3033 show_capture_file_io_error(save_file, err, TRUE);
3035 if (print_packet_info) {
3036 if (!write_finale()) {
3038 show_print_file_io_error(err);
3045 wtap_close(cf->wth);
3048 g_free(save_file_string);
3055 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3057 gboolean filtering_tap_listeners, guint tap_flags)
3060 gboolean create_proto_tree;
3065 /* Count this packet. */
3068 /* If we're not running a display filter and we're not printing any
3069 packet information, we don't need to do a dissection. This means
3070 that all packets can be marked as 'passed'. */
3073 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3075 /* If we're going to print packet information, or we're going to
3076 run a read filter, or we're going to process taps, set up to
3077 do a dissection and do so. */
3078 if (do_dissection) {
3079 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3080 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3081 /* Grab any resolved addresses */
3082 host_name_lookup_process();
3084 if (cf->rfcode || print_details || filtering_tap_listeners ||
3085 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3086 create_proto_tree = TRUE;
3088 create_proto_tree = FALSE;
3090 /* The protocol tree will be "visible", i.e., printed, only if we're
3091 printing packet details, which is true if we're printing stuff
3092 ("print_packet_info" is true) and we're in verbose mode
3093 ("packet_details" is true). */
3094 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3096 /* If we're running a read filter, prime the epan_dissect_t with that
3099 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3101 col_custom_prime_edt(&edt, &cf->cinfo);
3103 /* We only need the columns if either
3104 1) some tap needs the columns
3106 2) we're printing packet info but we're *not* verbose; in verbose
3107 mode, we print the protocol tree, not the protocol summary. */
3108 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
3113 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3114 &first_ts, prev_dis, prev_cap);
3116 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3118 /* Run the read filter if we have one. */
3120 passed = dfilter_apply_edt(cf->rfcode, &edt);
3124 frame_data_set_after_dissect(&fdata, &cum_bytes);
3125 prev_dis_frame = fdata;
3126 prev_dis = &prev_dis_frame;
3128 /* Process this packet. */
3129 if (print_packet_info) {
3130 /* We're printing packet information; print the information for
3133 print_packet(cf, &edt);
3135 print_packet(cf, NULL);
3137 /* The ANSI C standard does not appear to *require* that a line-buffered
3138 stream be flushed to the host environment whenever a newline is
3139 written, it just says that, on such a stream, characters "are
3140 intended to be transmitted to or from the host environment as a
3141 block when a new-line character is encountered".
3143 The Visual C++ 6.0 C implementation doesn't do what is intended;
3144 even if you set a stream to be line-buffered, it still doesn't
3145 flush the buffer at the end of every line.
3147 So, if the "-l" flag was specified, we flush the standard output
3148 at the end of a packet. This will do the right thing if we're
3149 printing packet summary lines, and, as we print the entire protocol
3150 tree for a single packet without waiting for anything to happen,
3151 it should be as good as line-buffered mode if we're printing
3152 protocol trees. (The whole reason for the "-l" flag in either
3153 tcpdump or TShark is to allow the output of a live capture to
3154 be piped to a program or script and to have that script see the
3155 information for the packet as soon as it's printed, rather than
3156 having to wait until a standard I/O buffer fills up. */
3160 if (ferror(stdout)) {
3161 show_print_file_io_error(errno);
3167 prev_cap_frame = fdata;
3168 prev_cap = &prev_cap_frame;
3170 if (do_dissection) {
3171 epan_dissect_cleanup(&edt);
3172 frame_data_cleanup(&fdata);
3178 write_preamble(capture_file *cf)
3180 switch (output_action) {
3183 return print_preamble(print_stream, cf ? cf->filename : NULL);
3187 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3189 write_psml_preamble(stdout);
3190 return !ferror(stdout);
3193 write_fields_preamble(output_fields, stdout);
3194 return !ferror(stdout);
3197 g_assert_not_reached();
3203 get_line_buf(size_t len)
3205 static char *line_bufp = NULL;
3206 static size_t line_buf_len = 256;
3207 size_t new_line_buf_len;
3209 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3210 new_line_buf_len *= 2)
3212 if (line_bufp == NULL) {
3213 line_buf_len = new_line_buf_len;
3214 line_bufp = g_malloc(line_buf_len + 1);
3216 if (new_line_buf_len > line_buf_len) {
3217 line_buf_len = new_line_buf_len;
3218 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3225 print_columns(capture_file *cf)
3232 line_bufp = get_line_buf(256);
3235 for (i = 0; i < cf->cinfo.num_cols; i++) {
3236 /* Skip columns not marked as visible. */
3237 if (!get_column_visible(i))
3239 switch (cf->cinfo.col_fmt[i]) {
3243 * Don't print this if we're doing a live capture from a network
3244 * interface - if we're doing a live capture, you won't be
3245 * able to look at the capture in the future (it's not being
3246 * saved anywhere), so the frame numbers are unlikely to be
3249 * (XXX - it might be nice to be able to save and print at
3250 * the same time, sort of like an "Update list of packets
3251 * in real time" capture in Wireshark.)
3253 if (global_capture_opts.ifaces->len > 0)
3256 column_len = strlen(cf->cinfo.col_data[i]);
3259 line_bufp = get_line_buf(buf_offset + column_len);
3260 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3266 case COL_ABS_DATE_TIME:
3268 case COL_UTC_DATE_TIME: /* XXX - wider */
3269 column_len = strlen(cf->cinfo.col_data[i]);
3270 if (column_len < 10)
3272 line_bufp = get_line_buf(buf_offset + column_len);
3273 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3279 case COL_DEF_DL_SRC:
3280 case COL_RES_DL_SRC:
3281 case COL_UNRES_DL_SRC:
3282 case COL_DEF_NET_SRC:
3283 case COL_RES_NET_SRC:
3284 case COL_UNRES_NET_SRC:
3285 column_len = strlen(cf->cinfo.col_data[i]);
3286 if (column_len < 12)
3288 line_bufp = get_line_buf(buf_offset + column_len);
3289 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3295 case COL_DEF_DL_DST:
3296 case COL_RES_DL_DST:
3297 case COL_UNRES_DL_DST:
3298 case COL_DEF_NET_DST:
3299 case COL_RES_NET_DST:
3300 case COL_UNRES_NET_DST:
3301 column_len = strlen(cf->cinfo.col_data[i]);
3302 if (column_len < 12)
3304 line_bufp = get_line_buf(buf_offset + column_len);
3305 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3309 column_len = strlen(cf->cinfo.col_data[i]);
3310 line_bufp = get_line_buf(buf_offset + column_len);
3311 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3314 buf_offset += column_len;
3315 if (i != cf->cinfo.num_cols - 1) {
3317 * This isn't the last column, so we need to print a
3318 * separator between this column and the next.
3320 * If we printed a network source and are printing a
3321 * network destination of the same type next, separate
3322 * them with " -> "; if we printed a network destination
3323 * and are printing a network source of the same type
3324 * next, separate them with " <- "; otherwise separate them
3327 * We add enough space to the buffer for " <- " or " -> ",
3328 * even if we're only adding " ".
3330 line_bufp = get_line_buf(buf_offset + 4);
3331 switch (cf->cinfo.col_fmt[i]) {
3336 switch (cf->cinfo.col_fmt[i + 1]) {
3341 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3346 g_strlcat(line_bufp + buf_offset, " ", 5);
3352 case COL_DEF_DL_SRC:
3353 case COL_RES_DL_SRC:
3354 case COL_UNRES_DL_SRC:
3355 switch (cf->cinfo.col_fmt[i + 1]) {
3357 case COL_DEF_DL_DST:
3358 case COL_RES_DL_DST:
3359 case COL_UNRES_DL_DST:
3360 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3365 g_strlcat(line_bufp + buf_offset, " ", 5);
3371 case COL_DEF_NET_SRC:
3372 case COL_RES_NET_SRC:
3373 case COL_UNRES_NET_SRC:
3374 switch (cf->cinfo.col_fmt[i + 1]) {
3376 case COL_DEF_NET_DST:
3377 case COL_RES_NET_DST:
3378 case COL_UNRES_NET_DST:
3379 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3384 g_strlcat(line_bufp + buf_offset, " ", 5);
3393 switch (cf->cinfo.col_fmt[i + 1]) {
3398 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3403 g_strlcat(line_bufp + buf_offset, " ", 5);
3409 case COL_DEF_DL_DST:
3410 case COL_RES_DL_DST:
3411 case COL_UNRES_DL_DST:
3412 switch (cf->cinfo.col_fmt[i + 1]) {
3414 case COL_DEF_DL_SRC:
3415 case COL_RES_DL_SRC:
3416 case COL_UNRES_DL_SRC:
3417 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3422 g_strlcat(line_bufp + buf_offset, " ", 5);
3428 case COL_DEF_NET_DST:
3429 case COL_RES_NET_DST:
3430 case COL_UNRES_NET_DST:
3431 switch (cf->cinfo.col_fmt[i + 1]) {
3433 case COL_DEF_NET_SRC:
3434 case COL_RES_NET_SRC:
3435 case COL_UNRES_NET_SRC:
3436 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3441 g_strlcat(line_bufp + buf_offset, " ", 5);
3448 g_strlcat(line_bufp + buf_offset, " ", 5);
3454 return print_line(print_stream, 0, line_bufp);
3458 print_packet(capture_file *cf, epan_dissect_t *edt)
3460 print_args_t print_args;
3462 if (print_summary) {
3463 /* Just fill in the columns. */
3464 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3466 /* Now print them. */
3467 switch (output_action) {
3470 if (!print_columns(cf))
3475 proto_tree_write_psml(edt, stdout);
3476 return !ferror(stdout);
3477 case WRITE_FIELDS: /*No non-verbose "fields" format */
3478 g_assert_not_reached();
3482 if (print_details) {
3483 /* Print the information in the protocol tree. */
3484 switch (output_action) {
3487 /* Only initialize the fields that are actually used in proto_tree_print.
3488 * This is particularly important for .range, as that's heap memory which
3489 * we would otherwise have to g_free().
3490 print_args.to_file = TRUE;
3491 print_args.format = print_format;
3492 print_args.print_summary = print_summary;
3493 print_args.print_formfeed = FALSE;
3494 packet_range_init(&print_args.range, &cfile);
3496 print_args.print_hex = print_hex;
3497 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3499 if (!proto_tree_print(&print_args, edt, print_stream))
3502 /* "print_hex_data()" will put out a leading blank line, as well
3503 as a trailing one; print one here, to separate the packets,
3504 only if "print_hex_data()" won't be called. */
3505 if (!print_line(print_stream, 0, separator))
3511 proto_tree_write_pdml(edt, stdout);
3513 return !ferror(stdout);
3515 proto_tree_write_fields(output_fields, edt, stdout);
3517 return !ferror(stdout);
3521 if (print_summary || print_details) {
3522 if (!print_line(print_stream, 0, ""))
3525 if (!print_hex_data(print_stream, edt))
3527 if (!print_line(print_stream, 0, separator))
3536 switch (output_action) {
3539 return print_finale(print_stream);
3543 write_pdml_finale(stdout);
3545 write_psml_finale(stdout);
3546 return !ferror(stdout);
3549 write_fields_finale(output_fields, stdout);
3550 return !ferror(stdout);
3553 g_assert_not_reached();
3559 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3563 char err_msg[2048+1];
3565 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3569 /* The open succeeded. Fill in the information for this file. */
3571 /* Cleanup all data structures used for dissection. */
3572 cleanup_dissection();
3573 /* Initialize all data structures used for dissection. */
3577 cf->f_datalen = 0; /* not used, but set it anyway */
3579 /* Set the file name because we need it to set the follow stream filter.
3580 XXX - is that still true? We need it for other reasons, though,
3582 cf->filename = g_strdup(fname);
3584 /* Indicate whether it's a permanent or temporary file. */
3585 cf->is_tempfile = is_tempfile;
3587 /* No user changes yet. */
3588 cf->unsaved_changes = FALSE;
3590 cf->cd_t = wtap_file_type(cf->wth);
3592 cf->drops_known = FALSE;
3594 cf->snap = wtap_snapshot_length(cf->wth);
3595 if (cf->snap == 0) {
3596 /* Snapshot length not known. */
3597 cf->has_snap = FALSE;
3598 cf->snap = WTAP_MAX_PACKET_SIZE;
3600 cf->has_snap = TRUE;
3601 nstime_set_zero(&cf->elapsed_time);
3602 nstime_set_unset(&first_ts);
3606 cf->state = FILE_READ_IN_PROGRESS;
3608 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3609 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3614 g_snprintf(err_msg, sizeof err_msg,
3615 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3616 cmdarg_err("%s", err_msg);
3621 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3623 char *save_file_string;
3625 save_file_string = output_file_description(fname);
3630 cmdarg_err("Not all the packets could be written to the %s because there is "
3631 "no space left on the file system.",
3637 cmdarg_err("Not all the packets could be written to the %s because you are "
3638 "too close to, or over your disk quota.",
3643 case WTAP_ERR_CANT_CLOSE:
3644 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3648 case WTAP_ERR_SHORT_WRITE:
3649 cmdarg_err("Not all the packets could be written to the %s.",
3655 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3656 wtap_strerror(err));
3658 cmdarg_err("An error occurred while writing to the %s: %s.",
3659 save_file_string, wtap_strerror(err));
3663 g_free(save_file_string);
3667 show_print_file_io_error(int err)
3672 cmdarg_err("Not all the packets could be printed because there is "
3673 "no space left on the file system.");
3678 cmdarg_err("Not all the packets could be printed because you are "
3679 "too close to, or over your disk quota.");
3684 cmdarg_err("An error occurred while printing packets: %s.",
3691 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3695 static char errmsg_errno[1024+1];
3698 /* Wiretap error. */
3701 case WTAP_ERR_NOT_REGULAR_FILE:
3702 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3705 case WTAP_ERR_RANDOM_OPEN_PIPE:
3706 /* Seen only when opening a capture file for reading. */
3707 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3710 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3711 /* Seen only when opening a capture file for reading. */
3712 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3715 case WTAP_ERR_UNSUPPORTED:
3716 /* Seen only when opening a capture file for reading. */
3717 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3718 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3721 errmsg = errmsg_errno;
3724 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3725 /* Seen only when opening a capture file for writing. */
3726 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3727 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3728 "written to a pipe.", wtap_file_type_short_string(file_type));
3729 errmsg = errmsg_errno;
3732 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3733 /* Seen only when opening a capture file for writing. */
3734 errmsg = "TShark doesn't support writing capture files in that format.";
3737 case WTAP_ERR_UNSUPPORTED_ENCAP:
3739 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3740 "TShark can't save this capture as a \"%s\" file.",
3741 wtap_file_type_short_string(file_type));
3743 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3744 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3748 errmsg = errmsg_errno;
3751 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3753 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3754 "TShark can't save this capture as a \"%s\" file.",
3755 wtap_file_type_short_string(file_type));
3756 errmsg = errmsg_errno;
3758 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3761 case WTAP_ERR_BAD_FILE:
3762 /* Seen only when opening a capture file for reading. */
3763 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3764 "The file \"%%s\" appears to be damaged or corrupt.\n"
3767 errmsg = errmsg_errno;
3770 case WTAP_ERR_CANT_OPEN:
3772 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3774 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3777 case WTAP_ERR_SHORT_READ:
3778 errmsg = "The file \"%s\" appears to have been cut short"
3779 " in the middle of a packet or other data.";
3782 case WTAP_ERR_SHORT_WRITE:
3783 errmsg = "A full header couldn't be written to the file \"%s\".";
3786 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3787 errmsg = "This file type cannot be written as a compressed file.";
3790 case WTAP_ERR_DECOMPRESS:
3791 /* Seen only when opening a capture file for reading. */
3792 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3793 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3796 errmsg = errmsg_errno;
3800 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3801 "The file \"%%s\" could not be %s: %s.",
3802 for_writing ? "created" : "opened",
3803 wtap_strerror(err));
3804 errmsg = errmsg_errno;
3808 errmsg = file_open_error_message(err, for_writing);
3813 * Open/create errors are reported with an console message in TShark.
3816 open_failure_message(const char *filename, int err, gboolean for_writing)
3818 fprintf(stderr, "tshark: ");
3819 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3820 fprintf(stderr, "\n");
3825 * General errors are reported with an console message in TShark.
3828 failure_message(const char *msg_format, va_list ap)
3830 fprintf(stderr, "tshark: ");
3831 vfprintf(stderr, msg_format, ap);
3832 fprintf(stderr, "\n");
3836 * Read errors are reported with an console message in TShark.
3839 read_failure_message(const char *filename, int err)
3841 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3842 filename, g_strerror(err));
3846 * Write errors are reported with an console message in TShark.
3849 write_failure_message(const char *filename, int err)
3851 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3852 filename, g_strerror(err));
3856 * Print to the standard error. This is a command-line tool, so there's
3857 * no need to pop up a console.
3860 vfprintf_stderr(const char *fmt, va_list ap)
3862 vfprintf(stderr, fmt, ap);
3866 fprintf_stderr(const char *fmt, ...)
3871 vfprintf_stderr(fmt, ap);
3876 * Report an error in command-line arguments.
3879 cmdarg_err(const char *fmt, ...)
3884 failure_message(fmt, ap);
3889 * Report additional information for an error in command-line arguments.
3892 cmdarg_err_cont(const char *fmt, ...)
3897 vfprintf(stderr, fmt, ap);
3898 fprintf(stderr, "\n");