3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
48 #ifdef HAVE_SYS_STAT_H
49 # include <sys/stat.h>
53 #include "wsutil/wsgetopt.h"
57 #include <epan/epan.h>
58 #include <epan/filesystem.h>
59 #include <wsutil/crash_info.h>
60 #include <wsutil/privileges.h>
61 #include <wsutil/file_util.h>
64 #include <epan/timestamp.h>
65 #include <epan/packet.h>
67 #include "disabled_protos.h"
68 #include <epan/prefs.h>
69 #include <epan/column.h>
71 #include <epan/addr_resolv.h>
73 #include "clopts_common.h"
74 #include "console_io.h"
75 #include "cmdarg_err.h"
76 #include "version_info.h"
77 #include <epan/plugins.h>
79 #include <epan/epan_dissect.h>
81 #include <epan/stat_cmd_args.h>
82 #include <epan/timestamp.h>
83 #include <epan/ex-opt.h>
86 #include "capture_ui_utils.h"
87 #include "capture_ifinfo.h"
88 #include "capture-pcap-util.h"
90 #include "capture-wpcap.h"
91 #include <wsutil/unicode-utils.h>
93 #include "capture_sync.h"
94 #endif /* HAVE_LIBPCAP */
96 #include <epan/funnel.h>
97 #include "capture_opts.h"
100 * This is the template for the decode as option; it is shared between the
101 * various functions that output the usage for this parameter.
103 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
105 static guint32 cum_bytes;
106 static nstime_t first_ts;
107 static frame_data *prev_dis;
108 static frame_data prev_dis_frame;
109 static frame_data *prev_cap;
110 static frame_data prev_cap_frame;
112 static const char* prev_display_dissector_name = NULL;
114 static gboolean perform_two_pass_analysis;
117 * The way the packet decode is to be written.
120 WRITE_TEXT, /* summary or detail text */
121 WRITE_XML, /* PDML or PSML */
122 WRITE_FIELDS /* User defined list of fields */
123 /* Add CSV and the like here */
126 static output_action_e output_action;
127 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
128 static gboolean print_packet_info; /* TRUE if we're to print packet information */
129 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
130 static gboolean print_details; /* TRUE if we're to print packet details information */
131 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
132 static gboolean line_buffered;
133 static gboolean really_quiet = FALSE;
135 static print_format_e print_format = PR_FMT_TEXT;
136 static print_stream_t *print_stream;
138 static output_fields_t* output_fields = NULL;
140 /* The line separator used between packets, changeable via the -S option */
141 static const char *separator = "";
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts = TRUE;
149 static capture_options global_capture_opts;
152 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
153 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
156 static gboolean capture(void);
157 static void report_counts(void);
159 static BOOL WINAPI capture_cleanup(DWORD);
161 static void capture_cleanup(int);
163 static void report_counts_siginfo(int);
166 #endif /* HAVE_LIBPCAP */
168 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
169 static gboolean process_packet(capture_file *cf, gint64 offset,
170 struct wtap_pkthdr *whdr,
171 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
172 static void show_capture_file_io_error(const char *, int, gboolean);
173 static void show_print_file_io_error(int err);
174 static gboolean write_preamble(capture_file *cf);
175 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
176 static gboolean write_finale(void);
177 static const char *cf_open_error_message(int err, gchar *err_info,
178 gboolean for_writing, int file_type);
180 static void open_failure_message(const char *filename, int err,
181 gboolean for_writing);
182 static void failure_message(const char *msg_format, va_list ap);
183 static void read_failure_message(const char *filename, int err);
184 static void write_failure_message(const char *filename, int err);
189 const char *sstr; /* The short string */
190 const char *lstr; /* The long string */
194 string_compare(gconstpointer a, gconstpointer b)
196 return strcmp(((const struct string_elem *)a)->sstr,
197 ((const struct string_elem *)b)->sstr);
201 string_elem_print(gpointer data, gpointer not_used _U_)
203 fprintf(stderr, " %s - %s\n",
204 ((struct string_elem *)data)->sstr,
205 ((struct string_elem *)data)->lstr);
209 list_capture_types(void) {
211 struct string_elem *captypes;
214 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
216 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
217 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
218 if (wtap_dump_can_open(i)) {
219 captypes[i].sstr = wtap_file_type_short_string(i);
220 captypes[i].lstr = wtap_file_type_string(i);
221 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
224 g_slist_foreach(list, string_elem_print, NULL);
230 print_usage(gboolean print_ver)
237 "TShark " VERSION "%s\n"
238 "Dump and analyze network traffic.\n"
239 "See http://www.wireshark.org for more information.\n"
242 wireshark_svnversion, get_copyright_info());
246 fprintf(output, "\n");
247 fprintf(output, "Usage: tshark [options] ...\n");
248 fprintf(output, "\n");
251 fprintf(output, "Capture interface:\n");
252 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
253 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
254 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
255 fprintf(output, " -p don't capture in promiscuous mode\n");
256 #ifdef HAVE_PCAP_CREATE
257 fprintf(output, " -I capture in monitor mode, if available\n");
259 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
260 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
262 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
263 fprintf(output, " -D print list of interfaces and exit\n");
264 fprintf(output, " -L print list of link-layer types of iface and exit\n");
265 fprintf(output, "\n");
266 fprintf(output, "Capture stop conditions:\n");
267 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
268 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
269 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
270 fprintf(output, " files:NUM - stop after NUM files\n");
271 /*fprintf(output, "\n");*/
272 fprintf(output, "Capture output:\n");
273 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
274 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
275 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
276 #endif /* HAVE_LIBPCAP */
277 #ifdef HAVE_PCAP_REMOTE
278 fprintf(output, "RPCAP options:\n");
279 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
281 /*fprintf(output, "\n");*/
282 fprintf(output, "Input file:\n");
283 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
285 fprintf(output, "\n");
286 fprintf(output, "Processing:\n");
287 fprintf(output, " -2 perform a two-pass analysis\n");
288 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
289 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
290 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
291 fprintf(output, " -d %s ...\n", decode_as_arg_template);
292 fprintf(output, " \"Decode As\", see the man page for details\n");
293 fprintf(output, " Example: tcp.port==8888,http\n");
294 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
295 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
297 /*fprintf(output, "\n");*/
298 fprintf(output, "Output:\n");
299 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
300 fprintf(output, " (or to the standard output for \"-\")\n");
301 fprintf(output, " -C <config profile> start with specified configuration profile\n");
302 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
303 fprintf(output, " an empty \"-F\" option will list the file types\n");
304 fprintf(output, " -V add output of packet tree (Packet Details)\n");
305 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
306 fprintf(output, " separated\n");
307 fprintf(output, " -P print packet summary even when writing to a file\n");
308 fprintf(output, " -S <separator> the line separator to print between packets\n");
309 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
310 fprintf(output, " -T pdml|ps|psml|text|fields\n");
311 fprintf(output, " format of text output (def: text)\n");
312 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
313 fprintf(output, " this option can be repeated to print multiple fields\n");
314 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
315 fprintf(output, " header=y|n switch headers on and off\n");
316 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
317 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
318 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
319 fprintf(output, " aggregator\n");
320 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
321 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
322 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
323 fprintf(output, " -l flush standard output after each packet\n");
324 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
325 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
326 fprintf(output, " -g enable group read access on the output file(s)\n");
327 fprintf(output, " -W n Save extra information in the file, if supported.\n");
328 fprintf(output, " n = write network address resolution information\n");
329 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
330 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
332 fprintf(output, "\n");
333 fprintf(output, "Miscellaneous:\n");
334 fprintf(output, " -h display this help and exit\n");
335 fprintf(output, " -v display version info and exit\n");
336 fprintf(output, " -o <name>:<value> ... override preference setting\n");
337 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
338 fprintf(output, " -G [report] dump one of several available reports and exit\n");
339 fprintf(output, " default report=\"fields\"\n");
340 fprintf(output, " use \"-G ?\" for more help\n");
344 glossary_option_help(void)
350 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
352 fprintf(output, "\n");
353 fprintf(output, "Usage: tshark -G [report]\n");
354 fprintf(output, "\n");
355 fprintf(output, "Glossary table reports:\n");
356 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
357 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
358 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
359 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
360 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
361 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
362 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
363 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
364 fprintf(output, "\n");
365 fprintf(output, "Preference reports:\n");
366 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
367 fprintf(output, " -G currentprefs dump current preferences and exit\n");
368 fprintf(output, "\n");
373 * For a dissector table, print on the stream described by output,
374 * its short name (which is what's used in the "-d" option) and its
378 display_dissector_table_names(const char *table_name, const char *ui_name,
381 if ((prev_display_dissector_name == NULL) ||
382 (strcmp(prev_display_dissector_name, table_name) != 0)) {
383 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
384 prev_display_dissector_name = table_name;
389 * For a dissector handle, print on the stream described by output,
390 * the filter name (which is what's used in the "-d" option) and the full
391 * name for the protocol that corresponds to this handle.
394 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
397 const gchar *proto_filter_name;
398 const gchar *proto_ui_name;
400 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
402 if (proto_id != -1) {
403 proto_filter_name = proto_get_protocol_filter_name(proto_id);
404 proto_ui_name = proto_get_protocol_name(proto_id);
405 g_assert(proto_filter_name != NULL);
406 g_assert(proto_ui_name != NULL);
408 if ((prev_display_dissector_name == NULL) ||
409 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
410 fprintf((FILE *)output, "\t%s (%s)\n",
413 prev_display_dissector_name = proto_filter_name;
419 * The protocol_name_search structure is used by find_protocol_name_func()
420 * to pass parameters and store results
422 struct protocol_name_search{
423 gchar *searched_name; /* Protocol filter name we are looking for */
424 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
425 guint nb_match; /* How many dissectors matched searched_name */
427 typedef struct protocol_name_search *protocol_name_search_t;
430 * This function parses all dissectors associated with a table to find the
431 * one whose protocol has the specified filter name. It is called
432 * as a reference function in a call to dissector_table_foreach_handle.
433 * The name we are looking for, as well as the results, are stored in the
434 * protocol_name_search struct pointed to by user_data.
435 * If called using dissector_table_foreach_handle, we actually parse the
436 * whole list of dissectors.
439 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
443 const gchar *protocol_filter_name;
444 protocol_name_search_t search_info;
448 search_info = (protocol_name_search_t)user_data;
450 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
451 if (proto_id != -1) {
452 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
453 g_assert(protocol_filter_name != NULL);
454 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
456 if (search_info->nb_match == 0) {
457 /* Record this handle only if this is the first match */
458 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
460 search_info->nb_match++;
466 * Allow dissector key names to be sorted alphabetically
470 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
472 return strcmp((const char*)dissector_a, (const char*)dissector_b);
476 * Print all layer type names supported.
477 * We send the output to the stream described by the handle output.
481 fprint_all_layer_types(FILE *output)
484 prev_display_dissector_name = NULL;
485 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
489 * Print all protocol names supported for a specific layer type.
490 * table_name contains the layer type name in which the search is performed.
491 * We send the output to the stream described by the handle output.
495 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
498 prev_display_dissector_name = NULL;
499 dissector_table_foreach_handle(table_name,
500 display_dissector_names,
505 * The function below parses the command-line parameters for the decode as
506 * feature (a string pointer by cl_param).
507 * It checks the format of the command-line, searches for a matching table
508 * and dissector. If a table/dissector match is not found, we display a
509 * summary of the available tables/dissectors (on stderr) and return FALSE.
510 * If everything is fine, we get the "Decode as" preference activated,
511 * then we return TRUE.
514 add_decode_as(const gchar *cl_param)
517 guint32 selector, selector2;
518 gchar *decoded_param;
519 gchar *remaining_param;
521 gchar *dissector_str;
522 dissector_handle_t dissector_matching;
523 dissector_table_t table_matching;
524 ftenum_t dissector_table_selector_type;
525 struct protocol_name_search user_protocol_name;
529 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
532 decoded_param = g_strdup(cl_param);
533 g_assert(decoded_param);
536 /* The lines below will parse this string (modifying it) to extract all
537 necessary information. Note that decoded_param is still needed since
538 strings are not copied - we just save pointers. */
540 /* This section extracts a layer type (table_name) from decoded_param */
541 table_name = decoded_param; /* Layer type string starts from beginning */
543 remaining_param = strchr(table_name, '=');
544 if (remaining_param == NULL) {
545 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
546 /* If the argument does not follow the template, carry on anyway to check
547 if the table name is at least correct. If remaining_param is NULL,
548 we'll exit anyway further down */
551 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
554 /* Remove leading and trailing spaces from the table name */
555 while ( table_name[0] == ' ' )
557 while ( table_name[strlen(table_name) - 1] == ' ' )
558 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
560 /* The following part searches a table matching with the layer type specified */
561 table_matching = NULL;
563 /* Look for the requested table */
564 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
565 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
568 table_matching = find_dissector_table(table_name);
569 if (!table_matching) {
570 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
574 if (!table_matching) {
575 /* Display a list of supported layer types to help the user, if the
576 specified layer type was not found */
577 cmdarg_err("Valid layer types are:");
578 fprint_all_layer_types(stderr);
580 if (remaining_param == NULL || !table_matching) {
581 /* Exit if the layer type was not found, or if no '=' separator was found
583 g_free(decoded_param);
587 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
588 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
591 remaining_param++; /* Move to the second '=' */
592 *remaining_param = '\0'; /* Remove the second '=' */
594 remaining_param++; /* Position after the layer type string */
596 /* This section extracts a selector value (selector_str) from decoded_param */
598 selector_str = remaining_param; /* Next part starts with the selector number */
600 remaining_param = strchr(selector_str, ',');
601 if (remaining_param == NULL) {
602 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
603 /* If the argument does not follow the template, carry on anyway to check
604 if the selector value is at least correct. If remaining_param is NULL,
605 we'll exit anyway further down */
608 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
611 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
613 switch (dissector_table_selector_type) {
619 /* The selector for this table is an unsigned number. Parse it as such.
620 There's no need to remove leading and trailing spaces from the
621 selector number string, because sscanf will do that for us. */
622 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
627 if (op != ':' && op != '-') {
628 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
629 g_free(decoded_param);
633 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
634 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
635 g_free(decoded_param);
639 else if (selector2 < selector) {
640 /* We could swap them for the user, but maybe it's better to call
641 * this out as an error in case it's not what was intended? */
642 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
643 g_free(decoded_param);
648 cmdarg_err("Invalid selector number \"%s\"", selector_str);
649 g_free(decoded_param);
656 /* The selector for this table is a string. */
660 /* There are currently no dissector tables with any types other
661 than the ones listed above. */
662 g_assert_not_reached();
665 if (remaining_param == NULL) {
666 /* Exit if no ',' separator was found (see above) */
667 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
668 fprint_all_protocols_for_layer_types(stderr, table_name);
669 g_free(decoded_param);
673 remaining_param++; /* Position after the selector number string */
675 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
677 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
679 /* Remove leading and trailing spaces from the dissector name */
680 while ( dissector_str[0] == ' ' )
682 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
683 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
685 dissector_matching = NULL;
687 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
688 if ( ! (*dissector_str) ) { /* Is the dissector name empty, if so, don't even search for a matching dissector and display all dissectors found for the selected table */
689 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
692 user_protocol_name.nb_match = 0;
693 user_protocol_name.searched_name = dissector_str;
694 user_protocol_name.matched_handle = NULL;
696 dissector_table_foreach_handle(table_name, find_protocol_name_func, &user_protocol_name); /* Go and perform the search for this dissector in the this table's dissectors' names and shortnames */
698 if (user_protocol_name.nb_match != 0) {
699 dissector_matching = user_protocol_name.matched_handle;
700 if (user_protocol_name.nb_match > 1) {
701 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
705 /* OK, check whether the problem is that there isn't any such
706 protocol, or that there is but it's not specified as a protocol
707 that's valid for that dissector table.
708 Note, we don't exit here, but dissector_matching will remain NULL,
710 if (proto_get_id_by_filter_name(dissector_str) == -1) {
711 /* No such protocol */
712 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
714 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
715 dissector_str, table_name);
720 if (!dissector_matching) {
721 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
722 fprint_all_protocols_for_layer_types(stderr, table_name);
723 g_free(decoded_param);
727 /* This is the end of the code that parses the command-line options.
728 All information is now stored in the variables:
732 The above variables that are strings are still pointing to areas within
733 decoded_parm. decoded_parm thus still needs to be kept allocated in
734 until we stop needing these variables
735 decoded_param will be deallocated at each exit point of this function */
738 /* We now have a pointer to the handle for the requested dissector
739 (requested protocol) inside the variable dissector_matching */
740 switch (dissector_table_selector_type) {
746 /* The selector for this table is an unsigned number. */
748 dissector_change_uint(table_name, selector, dissector_matching);
749 } else if (op == ':') {
750 for (i = selector; i < (guint64)selector + selector2; i++) {
751 dissector_change_uint(table_name, (guint32)i, dissector_matching);
753 } else { /* op == '-' */
754 for (i = selector; i <= selector2; i++) {
755 dissector_change_uint(table_name, (guint32)i, dissector_matching);
762 /* The selector for this table is a string. */
763 dissector_change_string(table_name, selector_str, dissector_matching);
767 /* There are currently no dissector tables with any types other
768 than the ones listed above. */
769 g_assert_not_reached();
771 g_free(decoded_param); /* "Decode As" rule has been successfully added */
776 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
777 const gchar *message, gpointer user_data)
779 /* ignore log message, if log_level isn't interesting based
780 upon the console log preferences.
781 If the preferences haven't been loaded loaded yet, display the
784 The default console_log_level preference value is such that only
785 ERROR, CRITICAL and WARNING level messages are processed;
786 MESSAGE, INFO and DEBUG level messages are ignored.
788 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
789 ERROR and CRITICAL level messages so the current code is a behavioral
790 change. The current behavior is the same as in Wireshark.
792 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
793 prefs.console_log_level != 0) {
797 g_log_default_handler(log_domain, log_level, message, user_data);
802 output_file_description(const char *fname)
804 char *save_file_string;
806 /* Get a string that describes what we're writing to */
807 if (strcmp(fname, "-") == 0) {
808 /* We're writing to the standard output */
809 save_file_string = g_strdup("standard output");
811 /* We're writing to a file with the name in save_file */
812 save_file_string = g_strdup_printf("file \"%s\"", fname);
814 return save_file_string;
818 print_current_user(void) {
819 gchar *cur_user, *cur_group;
821 if (started_with_special_privs()) {
822 cur_user = get_cur_username();
823 cur_group = get_cur_groupname();
824 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
825 cur_user, cur_group);
828 if (running_with_special_privs()) {
829 fprintf(stderr, " This could be dangerous.");
831 fprintf(stderr, "\n");
836 check_capture_privs(void) {
839 /* Warn the user if npf.sys isn't loaded. */
840 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
841 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
842 "capturing or\nlisting interfaces.\n");
848 show_version(GString *comp_info_str, GString *runtime_info_str)
850 printf("TShark " VERSION "%s\n"
857 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
858 runtime_info_str->str);
862 main(int argc, char *argv[])
864 GString *comp_info_str;
865 GString *runtime_info_str;
866 char *init_progfile_dir_error;
868 gboolean arg_error = FALSE;
874 char *gpf_path, *pf_path;
875 char *gdp_path, *dp_path;
876 int gpf_open_errno, gpf_read_errno;
877 int pf_open_errno, pf_read_errno;
878 int gdp_open_errno, gdp_read_errno;
879 int dp_open_errno, dp_read_errno;
881 volatile int exit_status = 0;
883 gboolean list_link_layer_types = FALSE;
884 gboolean start_capture = FALSE;
889 gboolean capture_option_specified = FALSE;
891 gboolean quiet = FALSE;
892 #ifdef PCAP_NG_DEFAULT
893 volatile int out_file_type = WTAP_FILE_PCAPNG;
895 volatile int out_file_type = WTAP_FILE_PCAP;
897 volatile gboolean out_file_name_res = FALSE;
898 gchar *volatile cf_name = NULL;
899 gchar *rfilter = NULL;
900 #ifdef HAVE_PCAP_OPEN_DEAD
901 struct bpf_program fcode;
903 dfilter_t *rfcode = NULL;
906 GLogLevelFlags log_flags;
908 gchar *output_only = NULL;
910 #ifdef HAVE_PCAP_REMOTE
911 #define OPTSTRING_A "A:"
913 #define OPTSTRING_A ""
916 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
917 #define OPTSTRING_B "B:"
919 #define OPTSTRING_B ""
920 #endif /* _WIN32 or HAVE_PCAP_CREATE */
921 #else /* HAVE_LIBPCAP */
922 #define OPTSTRING_B ""
923 #endif /* HAVE_LIBPCAP */
925 #ifdef HAVE_PCAP_CREATE
926 #define OPTSTRING_I "I"
928 #define OPTSTRING_I ""
931 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:z:"
933 static const char optstring[] = OPTSTRING;
935 /* Assemble the compile-time version information string */
936 comp_info_str = g_string_new("Compiled ");
937 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
939 /* Assemble the run-time version information string */
940 runtime_info_str = g_string_new("Running ");
941 get_runtime_version_info(runtime_info_str, NULL);
943 /* Add it to the information to be reported on a crash. */
944 ws_add_crash_info("TShark " VERSION "%s\n"
949 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
952 arg_list_utf_16to8(argc, argv);
953 #if !GLIB_CHECK_VERSION(2,31,0)
959 * Get credential information for later use.
961 init_process_policies();
964 * Attempt to get the pathname of the executable file.
966 init_progfile_dir_error = init_progfile_dir(argv[0], main);
967 if (init_progfile_dir_error != NULL) {
968 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
969 init_progfile_dir_error);
973 * In order to have the -X opts assigned before the wslua machine starts
974 * we need to call getopts before epan_init() gets called.
977 optind_initial = optind;
979 while ((opt = getopt(argc, argv, optstring)) != -1) {
981 case 'C': /* Configuration Profile */
982 if (profile_exists (optarg, FALSE)) {
983 set_profile_name (optarg);
985 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
989 case 'P': /* Print packet summary info even when writing to a file */
990 print_packet_info = TRUE;
991 print_summary = TRUE;
993 case 'O': /* Only output these protocols */
994 output_only = g_strdup(optarg);
996 case 'V': /* Verbose */
997 print_details = TRUE;
998 print_packet_info = TRUE;
1000 case 'x': /* Print packet data in hex (and ASCII) */
1002 /* The user asked for hex output, so let's ensure they get it,
1003 * even if they're writing to a file.
1005 print_packet_info = TRUE;
1016 * Print packet summary information is the default, unless either -V or -x
1017 * were specified and -P was not. Note that this is new behavior, which
1018 * allows for the possibility of printing only hex/ascii output without
1019 * necessarily requiring that either the summary or details be printed too.
1021 if (print_summary == -1)
1022 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1024 optind = optind_initial;
1029 /** Send All g_log messages to our own handler **/
1033 G_LOG_LEVEL_CRITICAL|
1034 G_LOG_LEVEL_WARNING|
1035 G_LOG_LEVEL_MESSAGE|
1038 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1040 g_log_set_handler(NULL,
1042 tshark_log_handler, NULL /* user_data */);
1043 g_log_set_handler(LOG_DOMAIN_MAIN,
1045 tshark_log_handler, NULL /* user_data */);
1048 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1050 tshark_log_handler, NULL /* user_data */);
1051 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1053 tshark_log_handler, NULL /* user_data */);
1056 initialize_funnel_ops();
1059 capture_opts_init(&global_capture_opts, &cfile);
1062 timestamp_set_type(TS_RELATIVE);
1063 timestamp_set_precision(TS_PREC_AUTO);
1064 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1066 /* Register all dissectors; we must do this before checking for the
1067 "-G" flag, as the "-G" flag dumps information registered by the
1068 dissectors, and we must do it before we read the preferences, in
1069 case any dissectors register preferences. */
1070 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1071 failure_message, open_failure_message, read_failure_message,
1072 write_failure_message);
1074 /* Register all tap listeners; we do this before we parse the arguments,
1075 as the "-z" argument can specify a registered tap. */
1077 /* we register the plugin taps before the other taps because
1078 stats_tree taps plugins will be registered as tap listeners
1079 by stats_tree_stat.c and need to registered before that */
1081 register_all_plugin_tap_listeners();
1083 register_all_tap_listeners();
1085 /* If invoked with the "-G" flag, we dump out information based on
1086 the argument to the "-G" flag; if no argument is specified,
1087 for backwards compatibility we dump out a glossary of display
1090 XXX - we do this here, for now, to support "-G" with no arguments.
1091 If none of our build or other processes uses "-G" with no arguments,
1092 we can just process it with the other arguments. */
1093 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1094 proto_initialize_all_prefixes();
1097 proto_registrar_dump_fields(1);
1099 if (strcmp(argv[2], "fields") == 0)
1100 proto_registrar_dump_fields(1);
1101 else if (strcmp(argv[2], "fields2") == 0)
1102 proto_registrar_dump_fields(2);
1103 else if (strcmp(argv[2], "fields3") == 0)
1104 proto_registrar_dump_fields(3);
1105 else if (strcmp(argv[2], "protocols") == 0)
1106 proto_registrar_dump_protocols();
1107 else if (strcmp(argv[2], "values") == 0)
1108 proto_registrar_dump_values();
1109 else if (strcmp(argv[2], "ftypes") == 0)
1110 proto_registrar_dump_ftypes();
1111 else if (strcmp(argv[2], "decodes") == 0)
1112 dissector_dump_decodes();
1113 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1114 dissector_dump_heur_decodes();
1115 else if (strcmp(argv[2], "defaultprefs") == 0)
1117 else if (strcmp(argv[2], "plugins") == 0)
1119 else if (strcmp(argv[2], "?") == 0)
1120 glossary_option_help();
1121 else if (strcmp(argv[2], "-?") == 0)
1122 glossary_option_help();
1123 else if (strcmp(argv[2], "currentprefs") == 0) {
1124 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1125 &pf_open_errno, &pf_read_errno, &pf_path);
1128 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1135 /* Set the C-language locale to the native environment. */
1136 setlocale(LC_ALL, "");
1138 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1139 &pf_open_errno, &pf_read_errno, &pf_path);
1140 if (gpf_path != NULL) {
1141 if (gpf_open_errno != 0) {
1142 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1143 pf_path, g_strerror(gpf_open_errno));
1145 if (gpf_read_errno != 0) {
1146 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1147 pf_path, g_strerror(gpf_read_errno));
1150 if (pf_path != NULL) {
1151 if (pf_open_errno != 0) {
1152 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1153 g_strerror(pf_open_errno));
1155 if (pf_read_errno != 0) {
1156 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1157 pf_path, g_strerror(pf_read_errno));
1163 /* Read the disabled protocols file. */
1164 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1165 &dp_path, &dp_open_errno, &dp_read_errno);
1166 if (gdp_path != NULL) {
1167 if (gdp_open_errno != 0) {
1168 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1169 gdp_path, g_strerror(gdp_open_errno));
1171 if (gdp_read_errno != 0) {
1172 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1173 gdp_path, g_strerror(gdp_read_errno));
1177 if (dp_path != NULL) {
1178 if (dp_open_errno != 0) {
1180 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1181 g_strerror(dp_open_errno));
1183 if (dp_read_errno != 0) {
1185 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1186 g_strerror(dp_read_errno));
1191 check_capture_privs();
1193 cap_file_init(&cfile);
1195 /* Print format defaults to this. */
1196 print_format = PR_FMT_TEXT;
1198 output_fields = output_fields_new();
1200 /* Now get our args */
1201 while ((opt = getopt(argc, argv, optstring)) != -1) {
1203 case '2': /* Perform two pass analysis */
1204 perform_two_pass_analysis = TRUE;
1206 case 'a': /* autostop criteria */
1207 case 'b': /* Ringbuffer option */
1208 case 'c': /* Capture x packets */
1209 case 'f': /* capture filter */
1210 case 'g': /* enable group read access on file(s) */
1211 case 'i': /* Use interface x */
1212 case 'p': /* Don't capture in promiscuous mode */
1213 #ifdef HAVE_PCAP_REMOTE
1214 case 'A': /* Authentication */
1216 #ifdef HAVE_PCAP_CREATE
1217 case 'I': /* Capture in monitor mode, if available */
1219 case 's': /* Set the snapshot (capture) length */
1220 case 'w': /* Write to capture file x */
1221 case 'y': /* Set the pcap data link type */
1222 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1223 case 'B': /* Buffer size */
1224 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1226 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1231 capture_option_specified = TRUE;
1236 /* Configuration profile settings were already processed just ignore them this time*/
1238 case 'd': /* Decode as rule */
1239 if (!add_decode_as(optarg))
1242 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1243 case 'K': /* Kerberos keytab file */
1244 read_keytab_file(optarg);
1247 case 'D': /* Print a list of capture devices and exit */
1249 if_list = capture_interface_list(&err, &err_str);
1250 if (if_list == NULL) {
1252 case CANT_GET_INTERFACE_LIST:
1253 case DONT_HAVE_PCAP:
1254 cmdarg_err("%s", err_str);
1258 case NO_INTERFACES_FOUND:
1259 cmdarg_err("There are no interfaces on which a capture can be done");
1264 capture_opts_print_interfaces(if_list);
1265 free_interface_list(if_list);
1268 capture_option_specified = TRUE;
1274 output_fields_add(output_fields, optarg);
1278 if (!output_fields_set_option(output_fields, optarg)) {
1279 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1280 output_fields_list_options(stderr);
1285 out_file_type = wtap_short_string_to_file_type(optarg);
1286 if (out_file_type < 0) {
1287 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1288 list_capture_types();
1292 case 'W': /* Select extra information to save in our capture file */
1293 /* This is patterned after the -N flag which may not be the best idea. */
1294 if (strchr(optarg, 'n')) {
1295 out_file_name_res = TRUE;
1297 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1301 case 'H': /* Read address to name mappings from a hosts file */
1302 if (! add_hosts_file(optarg))
1304 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1307 out_file_name_res = TRUE;
1310 case 'h': /* Print help and exit */
1314 case 'l': /* "Line-buffer" standard output */
1315 /* This isn't line-buffering, strictly speaking, it's just
1316 flushing the standard output after the information for
1317 each packet is printed; however, that should be good
1318 enough for all the purposes to which "-l" is put (and
1319 is probably actually better for "-V", as it does fewer
1322 See the comment in "process_packet()" for an explanation of
1323 why we do that, and why we don't just use "setvbuf()" to
1324 make the standard output line-buffered (short version: in
1325 Windows, "line-buffered" is the same as "fully-buffered",
1326 and the output buffer is only flushed when it fills up). */
1327 line_buffered = TRUE;
1329 case 'L': /* Print list of link-layer types and exit */
1331 list_link_layer_types = TRUE;
1333 capture_option_specified = TRUE;
1337 case 'n': /* No name resolution */
1338 gbl_resolv_flags.mac_name = FALSE;
1339 gbl_resolv_flags.network_name = FALSE;
1340 gbl_resolv_flags.transport_name = FALSE;
1341 gbl_resolv_flags.concurrent_dns = FALSE;
1343 case 'N': /* Select what types of addresses/port #s to resolve */
1344 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1345 if (badopt != '\0') {
1346 cmdarg_err("-N specifies unknown resolving option '%c';",
1348 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1352 case 'o': /* Override preference from command line */
1353 switch (prefs_set_pref(optarg)) {
1358 case PREFS_SET_SYNTAX_ERR:
1359 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1363 case PREFS_SET_NO_SUCH_PREF:
1364 case PREFS_SET_OBSOLETE:
1365 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1370 case 'q': /* Quiet */
1373 case 'Q': /* Really quiet */
1375 really_quiet = TRUE;
1377 case 'r': /* Read capture file x */
1378 cf_name = g_strdup(optarg);
1380 case 'R': /* Read file filter */
1384 /* already processed; just ignore it now */
1386 case 'S': /* Set the line Separator to be printed between packets */
1387 separator = strdup(optarg);
1389 case 't': /* Time stamp type */
1390 if (strcmp(optarg, "r") == 0)
1391 timestamp_set_type(TS_RELATIVE);
1392 else if (strcmp(optarg, "a") == 0)
1393 timestamp_set_type(TS_ABSOLUTE);
1394 else if (strcmp(optarg, "ad") == 0)
1395 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1396 else if (strcmp(optarg, "d") == 0)
1397 timestamp_set_type(TS_DELTA);
1398 else if (strcmp(optarg, "dd") == 0)
1399 timestamp_set_type(TS_DELTA_DIS);
1400 else if (strcmp(optarg, "e") == 0)
1401 timestamp_set_type(TS_EPOCH);
1402 else if (strcmp(optarg, "u") == 0)
1403 timestamp_set_type(TS_UTC);
1404 else if (strcmp(optarg, "ud") == 0)
1405 timestamp_set_type(TS_UTC_WITH_DATE);
1407 cmdarg_err("Invalid time stamp type \"%s\"",
1409 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1410 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1414 case 'T': /* printing Type */
1415 if (strcmp(optarg, "text") == 0) {
1416 output_action = WRITE_TEXT;
1417 print_format = PR_FMT_TEXT;
1418 } else if (strcmp(optarg, "ps") == 0) {
1419 output_action = WRITE_TEXT;
1420 print_format = PR_FMT_PS;
1421 } else if (strcmp(optarg, "pdml") == 0) {
1422 output_action = WRITE_XML;
1423 print_details = TRUE; /* Need details */
1424 print_summary = FALSE; /* Don't allow summary */
1425 } else if (strcmp(optarg, "psml") == 0) {
1426 output_action = WRITE_XML;
1427 print_details = FALSE; /* Don't allow details */
1428 print_summary = TRUE; /* Need summary */
1429 } else if (strcmp(optarg, "fields") == 0) {
1430 output_action = WRITE_FIELDS;
1431 print_details = TRUE; /* Need full tree info */
1432 print_summary = FALSE; /* Don't allow summary */
1434 cmdarg_err("Invalid -T parameter.");
1435 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1439 case 'u': /* Seconds type */
1440 if (strcmp(optarg, "s") == 0)
1441 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1442 else if (strcmp(optarg, "hms") == 0)
1443 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1445 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1446 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1450 case 'v': /* Show version and exit */
1452 show_version(comp_info_str, runtime_info_str);
1453 g_string_free(comp_info_str, TRUE);
1454 g_string_free(runtime_info_str, TRUE);
1457 case 'O': /* Only output these protocols */
1458 /* already processed; just ignore it now */
1460 case 'V': /* Verbose */
1461 /* already processed; just ignore it now */
1463 case 'x': /* Print packet data in hex (and ASCII) */
1464 /* already processed; just ignore it now */
1469 /* We won't call the init function for the stat this soon
1470 as it would disallow MATE's fields (which are registered
1471 by the preferences set callback) from being used as
1472 part of a tap filter. Instead, we just add the argument
1473 to a list of stat arguments. */
1474 if (!process_stat_cmd_arg(optarg)) {
1475 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1476 cmdarg_err_cont(" -z argument must be one of :");
1477 list_stat_cmd_args();
1482 case '?': /* Bad flag - print usage message */
1485 list_capture_types();
1495 /* If we specified output fields, but not the output field type... */
1496 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1497 cmdarg_err("Output fields were specified with \"-e\", "
1498 "but \"-Tfields\" was not specified.");
1500 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1501 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1502 "specified with \"-e\".");
1507 /* If no capture filter or read filter has been specified, and there are
1508 still command-line arguments, treat them as the tokens of a capture
1509 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1510 flag was specified. */
1511 if (optind < argc) {
1512 if (cf_name != NULL) {
1513 if (rfilter != NULL) {
1514 cmdarg_err("Read filters were specified both with \"-R\" "
1515 "and with additional command-line arguments.");
1518 rfilter = get_args_as_string(argc, argv, optind);
1523 if (global_capture_opts.default_options.cfilter) {
1524 cmdarg_err("A default capture filter was specified both with \"-f\""
1525 " and with additional command-line arguments.");
1528 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1529 interface_options interface_opts;
1530 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1531 if (interface_opts.cfilter == NULL) {
1532 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1533 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1534 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1536 cmdarg_err("A capture filter was specified both with \"-f\""
1537 " and with additional command-line arguments.");
1541 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1543 capture_option_specified = TRUE;
1549 if (!global_capture_opts.saving_to_file) {
1550 /* We're not saving the capture to a file; if "-q" wasn't specified,
1551 we should print packet information */
1553 print_packet_info = TRUE;
1555 /* We're saving to a file; if we're writing to the standard output.
1556 and we'll also be writing dissected packets to the standard
1557 output, reject the request. At best, we could redirect that
1558 to the standard error; we *can't* write both to the standard
1559 output and have either of them be useful. */
1560 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1561 cmdarg_err("You can't write both raw packet data and dissected packets"
1562 " to the standard output.");
1567 /* We're not saving the capture to a file; if "-q" wasn't specified,
1568 we should print packet information */
1570 print_packet_info = TRUE;
1573 #ifndef HAVE_LIBPCAP
1574 if (capture_option_specified)
1575 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1582 /* We don't support capture filters when reading from a capture file
1583 (the BPF compiler doesn't support all link-layer types that we
1584 support in capture files we read). */
1586 if (cf_name != NULL) {
1587 if (global_capture_opts.default_options.cfilter) {
1588 cmdarg_err("Only read filters, not capture filters, "
1589 "can be specified when reading a capture file.");
1596 if (output_action != WRITE_TEXT) {
1597 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1602 if (output_only != NULL) {
1605 if (!print_details) {
1606 cmdarg_err("-O requires -V");
1610 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1611 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1612 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1617 if (list_link_layer_types) {
1618 /* We're supposed to list the link-layer types for an interface;
1619 did the user also specify a capture file to be read? */
1621 /* Yes - that's bogus. */
1622 cmdarg_err("You can't specify -L and a capture file to be read.");
1625 /* No - did they specify a ring buffer option? */
1626 if (global_capture_opts.multi_files_on) {
1627 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1633 * "-r" was specified, so we're reading a capture file.
1634 * Capture options don't apply here.
1636 if (global_capture_opts.multi_files_on) {
1637 cmdarg_err("Multiple capture files requested, but "
1638 "a capture isn't being done.");
1641 if (global_capture_opts.has_file_duration) {
1642 cmdarg_err("Switching capture files after a time interval was specified, but "
1643 "a capture isn't being done.");
1646 if (global_capture_opts.has_ring_num_files) {
1647 cmdarg_err("A ring buffer of capture files was specified, but "
1648 "a capture isn't being done.");
1651 if (global_capture_opts.has_autostop_files) {
1652 cmdarg_err("A maximum number of capture files was specified, but "
1653 "a capture isn't being done.");
1657 /* Note: TShark now allows the restriction of a _read_ file by packet count
1658 * and byte count as well as a write file. Other autostop options remain valid
1659 * only for a write file.
1661 if (global_capture_opts.has_autostop_duration) {
1662 cmdarg_err("A maximum capture time was specified, but "
1663 "a capture isn't being done.");
1668 * "-r" wasn't specified, so we're doing a live capture.
1670 if (global_capture_opts.saving_to_file) {
1671 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1673 /* When capturing, we only support writing pcap or pcap-ng format. */
1674 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1675 cmdarg_err("Live captures can only be saved in libpcap format.");
1678 if (global_capture_opts.multi_files_on) {
1679 /* Multiple-file mode doesn't work under certain conditions:
1680 a) it doesn't work if you're writing to the standard output;
1681 b) it doesn't work if you're writing to a pipe;
1683 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1684 cmdarg_err("Multiple capture files requested, but "
1685 "the capture is being written to the standard output.");
1688 if (global_capture_opts.output_to_pipe) {
1689 cmdarg_err("Multiple capture files requested, but "
1690 "the capture file is a pipe.");
1693 if (!global_capture_opts.has_autostop_filesize &&
1694 !global_capture_opts.has_file_duration) {
1695 cmdarg_err("Multiple capture files requested, but "
1696 "no maximum capture file size or duration was specified.");
1700 /* Currently, we don't support read filters when capturing
1701 and saving the packets. */
1702 if (rfilter != NULL) {
1703 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1707 /* They didn't specify a "-w" flag, so we won't be saving to a
1708 capture file. Check for options that only make sense if
1709 we're saving to a file. */
1710 if (global_capture_opts.has_autostop_filesize) {
1711 cmdarg_err("Maximum capture file size specified, but "
1712 "capture isn't being saved to a file.");
1715 if (global_capture_opts.multi_files_on) {
1716 cmdarg_err("Multiple capture files requested, but "
1717 "the capture isn't being saved to a file.");
1726 /* Start windows sockets */
1727 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1730 /* Notify all registered modules that have had any of their preferences
1731 changed either from one of the preferences file or from the command
1732 line that their preferences have changed. */
1735 /* At this point MATE will have registered its field array so we can
1736 have a tap filter with one of MATE's late-registered fields as part
1737 of the filter. We can now process all the "-z" arguments. */
1738 start_requested_stats();
1741 /* We currently don't support taps, or printing dissected packets,
1742 if we're writing to a pipe. */
1743 if (global_capture_opts.saving_to_file &&
1744 global_capture_opts.output_to_pipe) {
1745 if (tap_listeners_require_dissection()) {
1746 cmdarg_err("Taps aren't supported when saving to a pipe.");
1749 if (print_packet_info) {
1750 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1756 /* disabled protocols as per configuration file */
1757 if (gdp_path == NULL && dp_path == NULL) {
1758 set_disabled_protos_list();
1761 /* Build the column format array */
1762 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1765 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1766 capture_opts_trim_ring_num_files(&global_capture_opts);
1769 if (rfilter != NULL) {
1770 if (!dfilter_compile(rfilter, &rfcode)) {
1771 cmdarg_err("%s", dfilter_error_msg);
1773 #ifdef HAVE_PCAP_OPEN_DEAD
1777 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1779 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1781 " Note: That display filter code looks like a valid capture filter;");
1783 " maybe you mixed them up?");
1792 cfile.rfcode = rfcode;
1794 if (print_packet_info) {
1795 /* If we're printing as text or PostScript, we have
1796 to create a print stream. */
1797 if (output_action == WRITE_TEXT) {
1798 switch (print_format) {
1801 print_stream = print_stream_text_stdio_new(stdout);
1805 print_stream = print_stream_ps_stdio_new(stdout);
1809 g_assert_not_reached();
1814 /* We have to dissect each packet if:
1816 we're printing information about each packet;
1818 we're using a read filter on the packets;
1820 we're using any taps that need dissection. */
1821 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1825 * We're reading a capture file.
1829 * Immediately relinquish any special privileges we have; we must not
1830 * be allowed to read any capture files the user running TShark
1833 relinquish_special_privs_perm();
1834 print_current_user();
1836 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1841 /* Set timestamp precision; there should arguably be a command-line
1842 option to let the user set this. */
1843 switch(wtap_file_tsprecision(cfile.wth)) {
1844 case(WTAP_FILE_TSPREC_SEC):
1845 timestamp_set_precision(TS_PREC_AUTO_SEC);
1847 case(WTAP_FILE_TSPREC_DSEC):
1848 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1850 case(WTAP_FILE_TSPREC_CSEC):
1851 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1853 case(WTAP_FILE_TSPREC_MSEC):
1854 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1856 case(WTAP_FILE_TSPREC_USEC):
1857 timestamp_set_precision(TS_PREC_AUTO_USEC);
1859 case(WTAP_FILE_TSPREC_NSEC):
1860 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1863 g_assert_not_reached();
1866 /* Process the packets in the file */
1869 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1870 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1871 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1873 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1876 CATCH(OutOfMemoryError) {
1880 "Sorry, but TShark has to terminate now!\n"
1882 "Some infos / workarounds can be found at:\n"
1883 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1888 /* We still dump out the results of taps, etc., as we might have
1889 read some packets; however, we exit with an error status. */
1893 /* No capture file specified, so we're supposed to do a live capture
1894 (or get a list of link-layer types for a live capture device);
1895 do we have support for live captures? */
1897 /* trim the interface name and exit if that failed */
1898 exit_status = capture_opts_trim_iface(&global_capture_opts,
1899 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1900 if (exit_status != 0)
1903 /* if requested, list the link layer types and exit */
1904 if (list_link_layer_types) {
1907 /* Get the list of link-layer types for the capture devices. */
1908 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1909 interface_options interface_opts;
1910 if_capabilities_t *caps;
1912 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1913 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1915 cmdarg_err("%s", err_str);
1919 if (caps->data_link_types == NULL) {
1920 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1923 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1924 free_if_capabilities(caps);
1929 if (print_packet_info) {
1930 if (!write_preamble(NULL)) {
1931 show_print_file_io_error(errno);
1934 } else if (!quiet) {
1936 * We're not printing information for each packet, and the user
1937 * didn't ask us not to print a count of packets as they arrive,
1938 * so print that count so the user knows that packets are arriving.
1940 * XXX - what if the user wants to do a live capture, doesn't want
1941 * to save it to a file, doesn't want information printed for each
1942 * packet, does want some "-z" statistic, and wants packet counts
1943 * so they know whether they're seeing any packets?
1945 print_packet_counts = TRUE;
1948 /* For now, assume libpcap gives microsecond precision. */
1949 timestamp_set_precision(TS_PREC_AUTO_USEC);
1952 * XXX - this returns FALSE if an error occurred, but it also
1953 * returns FALSE if the capture stops because a time limit
1954 * was reached (and possibly other limits), so we can't assume
1955 * it means an error.
1957 * The capture code is a bit twisty, so it doesn't appear to
1958 * be an easy fix. We just ignore the return value for now.
1959 * Instead, pass on the exit status from the capture child.
1962 exit_status = global_capture_opts.fork_child_status;
1964 if (print_packet_info) {
1965 if (!write_finale()) {
1967 show_print_file_io_error(err);
1971 /* No - complain. */
1972 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1979 if (cfile.frames != NULL) {
1980 free_frame_data_sequence(cfile.frames);
1981 cfile.frames = NULL;
1984 draw_tap_listeners(TRUE);
1985 funnel_dump_all_text_windows();
1988 output_fields_free(output_fields);
1989 output_fields = NULL;
1994 /*#define USE_BROKEN_G_MAIN_LOOP*/
1996 #ifdef USE_BROKEN_G_MAIN_LOOP
1999 gboolean loop_running = FALSE;
2001 guint32 packet_count = 0;
2004 /* XXX - move to the right position / file */
2005 /* read from a pipe (callback) */
2006 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2008 typedef struct pipe_input_tag {
2012 pipe_input_cb_t input_cb;
2013 guint pipe_input_id;
2015 GMutex *callback_running;
2019 static pipe_input_t pipe_input;
2022 /* The timer has expired, see if there's stuff to read from the pipe,
2023 if so, do the callback */
2025 pipe_timer_cb(gpointer data)
2031 pipe_input_t *pipe_input_p = data;
2032 gint iterations = 0;
2034 g_mutex_lock (pipe_input_p->callback_running);
2036 /* try to read data from the pipe only 5 times, to avoid blocking */
2037 while(iterations < 5) {
2038 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2040 /* Oddly enough although Named pipes don't work on win9x,
2041 PeekNamedPipe does !!! */
2042 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2043 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2045 /* Get the child process exit status */
2046 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2049 /* If the Peek returned an error, or there are bytes to be read
2050 or the childwatcher thread has terminated then call the normal
2052 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2054 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2056 /* And call the real handler */
2057 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2058 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2059 /* pipe closed, return false so that the timer is stopped */
2060 g_mutex_unlock (pipe_input_p->callback_running);
2065 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2066 /* No data, stop now */
2073 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2075 g_mutex_unlock (pipe_input_p->callback_running);
2077 /* we didn't stopped the timer, so let it run */
2084 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2087 pipe_input.source = source;
2088 pipe_input.child_process = child_process;
2089 pipe_input.user_data = user_data;
2090 pipe_input.input_cb = input_cb;
2093 #if GLIB_CHECK_VERSION(2,31,0)
2094 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2095 g_mutex_init(pipe_input.callback_running);
2097 pipe_input.callback_running = g_mutex_new();
2099 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2100 do this but that doesn't cover all win32 platforms. GTK can do
2101 this but doesn't seem to work over processes. Attempt to do
2102 something similar here, start a timer and check for data on every
2104 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2105 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2116 GString *str = g_string_new("");
2117 #ifdef USE_TSHARK_SELECT
2121 struct sigaction action, oldaction;
2125 * XXX - dropping privileges is still required, until code cleanup is done
2127 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2128 * when it's done, we don't need special privileges to run tshark at all,
2129 * therefore we don't need to drop these privileges
2130 * The only thing we might want to keep is a warning if tshark is run as root,
2131 * as it's no longer necessary and potentially dangerous.
2133 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2134 * We've opened the capture device, so we shouldn't need any special
2135 * privileges any more; relinquish those privileges.
2137 * XXX - if we have saved set-user-ID support, we should give up those
2138 * privileges immediately, and then reclaim them long enough to get
2139 * a list of network interfaces and to open one, and then give them
2140 * up again, so that stuff we do while processing the argument list,
2141 * reading the user's preferences, loading and starting plugins
2142 * (especially *user* plugins), etc. is done with the user's privileges,
2143 * not special privileges.
2145 relinquish_special_privs_perm();
2146 print_current_user();
2148 /* Cleanup all data structures used for dissection. */
2149 cleanup_dissection();
2150 /* Initialize all data structures used for dissection. */
2154 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2155 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2157 /* Catch SIGINT and SIGTERM and, if we get either of them,
2158 clean up and exit. If SIGHUP isn't being ignored, catch
2159 it too and, if we get it, clean up and exit.
2161 We restart any read that was in progress, so that it doesn't
2162 disrupt reading from the sync pipe. The signal handler tells
2163 the capture child to finish; it will report that it finished,
2164 or will exit abnormally, so we'll stop reading from the sync
2165 pipe, pick up the exit status, and quit. */
2166 memset(&action, 0, sizeof(action));
2167 action.sa_handler = capture_cleanup;
2168 action.sa_flags = SA_RESTART;
2169 sigemptyset(&action.sa_mask);
2170 sigaction(SIGTERM, &action, NULL);
2171 sigaction(SIGINT, &action, NULL);
2172 sigaction(SIGHUP, NULL, &oldaction);
2173 if (oldaction.sa_handler == SIG_DFL)
2174 sigaction(SIGHUP, &action, NULL);
2177 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2178 quiet mode, report the number of packets we've captured.
2180 Again, restart any read that was in progress, so that it doesn't
2181 disrupt reading from the sync pipe. */
2182 action.sa_handler = report_counts_siginfo;
2183 action.sa_flags = SA_RESTART;
2184 sigemptyset(&action.sa_mask);
2185 sigaction(SIGINFO, &action, NULL);
2186 #endif /* SIGINFO */
2189 global_capture_opts.state = CAPTURE_PREPARING;
2191 /* Let the user know which interfaces were chosen. */
2192 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2193 interface_options interface_opts;
2195 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2196 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2197 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2198 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2201 if (global_capture_opts.ifaces->len < 2) {
2203 if (global_capture_opts.ifaces->len < 4) {
2205 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2206 interface_options interface_opts;
2208 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2210 if (global_capture_opts.ifaces->len > 2) {
2211 g_string_append_printf(str, ",");
2213 g_string_append_printf(str, " ");
2214 if (i == global_capture_opts.ifaces->len - 1) {
2215 g_string_append_printf(str, "and ");
2218 g_string_append_printf(str, "'%s'", interface_opts.descr);
2221 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2223 if (really_quiet == FALSE)
2224 fprintf(stderr, "Capturing on %s\n", str->str);
2226 g_string_free(str, TRUE);
2228 ret = sync_pipe_start(&global_capture_opts);
2233 /* the actual capture loop
2235 * XXX - glib doesn't seem to provide any event based loop handling.
2237 * XXX - for whatever reason,
2238 * calling g_main_loop_new() ends up in 100% cpu load.
2240 * But that doesn't matter: in UNIX we can use select() to find an input
2241 * source with something to do.
2243 * But that doesn't matter because we're in a CLI (that doesn't need to
2244 * update a GUI or something at the same time) so it's OK if we block
2245 * trying to read from the pipe.
2247 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2248 * wrong (but I leave it there in case I am...).
2251 #ifdef USE_TSHARK_SELECT
2253 FD_SET(pipe_input.source, &readfds);
2256 loop_running = TRUE;
2260 while (loop_running)
2262 #ifdef USE_TSHARK_SELECT
2263 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2269 } else if (ret == 1) {
2271 /* Call the real handler */
2272 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2273 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2276 #ifdef USE_TSHARK_SELECT
2281 CATCH(OutOfMemoryError) {
2285 "Sorry, but TShark has to terminate now!\n"
2287 "Some infos / workarounds can be found at:\n"
2288 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2296 /* XXX - move the call to main_window_update() out of capture_sync.c */
2297 /* dummy for capture_sync.c to make linker happy */
2298 void main_window_update(void)
2302 /* capture child detected an error */
2304 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2306 cmdarg_err("%s", error_msg);
2307 cmdarg_err_cont("%s", secondary_error_msg);
2311 /* capture child detected an capture filter related error */
2313 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2315 dfilter_t *rfcode = NULL;
2316 interface_options interface_opts;
2318 g_assert(i < capture_opts->ifaces->len);
2319 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2321 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2323 "Invalid capture filter \"%s\" for interface %s!\n"
2325 "That string looks like a valid display filter; however, it isn't a valid\n"
2326 "capture filter (%s).\n"
2328 "Note that display filters and capture filters don't have the same syntax,\n"
2329 "so you can't use most display filter expressions as capture filters.\n"
2331 "See the User's Guide for a description of the capture filter syntax.",
2332 interface_opts.cfilter, interface_opts.descr, error_message);
2333 dfilter_free(rfcode);
2336 "Invalid capture filter \"%s\" for interface %s!\n"
2338 "That string isn't a valid capture filter (%s).\n"
2339 "See the User's Guide for a description of the capture filter syntax.",
2340 interface_opts.cfilter, interface_opts.descr, error_message);
2345 /* capture child tells us we have a new (or the first) capture file */
2347 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2349 gboolean is_tempfile;
2352 if (capture_opts->state == CAPTURE_PREPARING) {
2353 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2355 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2357 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2359 /* free the old filename */
2360 if (capture_opts->save_file != NULL) {
2362 /* we start a new capture file, close the old one (if we had one before) */
2363 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2364 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2365 wtap_close(((capture_file *) capture_opts->cf)->wth);
2367 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2370 g_free(capture_opts->save_file);
2371 is_tempfile = FALSE;
2373 /* we didn't had a save_file before, must be a tempfile */
2377 /* save the new filename */
2378 capture_opts->save_file = g_strdup(new_file);
2380 /* if we are in real-time mode, open the new file now */
2381 if (do_dissection) {
2382 /* Attempt to open the capture file and set up to read from it. */
2383 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2387 /* Don't unlink (delete) the save file - leave it around,
2388 for debugging purposes. */
2389 g_free(capture_opts->save_file);
2390 capture_opts->save_file = NULL;
2395 capture_opts->state = CAPTURE_RUNNING;
2401 /* capture child tells us we have new packets to read */
2403 capture_input_new_packets(capture_options *capture_opts, int to_read)
2409 capture_file *cf = capture_opts->cf;
2410 gboolean filtering_tap_listeners;
2415 * Prevent a SIGINFO handler from writing to the standard error while
2416 * we're doing so or writing to the standard output; instead, have it
2417 * just set a flag telling us to print that information when we're done.
2420 #endif /* SIGINFO */
2422 /* Do we have any tap listeners with filters? */
2423 filtering_tap_listeners = have_filtering_tap_listeners();
2425 /* Get the union of the flags for all tap listeners. */
2426 tap_flags = union_of_tap_listener_flags();
2428 if (do_dissection) {
2429 while (to_read-- && cf->wth) {
2430 wtap_cleareof(cf->wth);
2431 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2433 /* read from file failed, tell the capture child to stop */
2434 sync_pipe_stop(capture_opts);
2435 wtap_close(cf->wth);
2438 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2439 wtap_buf_ptr(cf->wth),
2440 filtering_tap_listeners, tap_flags);
2443 /* packet successfully read and gone through the "Read Filter" */
2449 * Dumpcap's doing all the work; we're not doing any dissection.
2450 * Count all the packets it wrote.
2452 packet_count += to_read;
2455 if (print_packet_counts) {
2456 /* We're printing packet counts. */
2457 if (packet_count != 0) {
2458 fprintf(stderr, "\r%u ", packet_count);
2459 /* stderr could be line buffered */
2466 * Allow SIGINFO handlers to write.
2471 * If a SIGINFO handler asked us to write out capture counts, do so.
2475 #endif /* SIGINFO */
2481 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2482 /* Report the count only if we aren't printing a packet count
2483 as packets arrive. */
2484 fprintf(stderr, "%u packet%s captured\n", packet_count,
2485 plurality(packet_count, "", "s"));
2488 infoprint = FALSE; /* we just reported it */
2489 #endif /* SIGINFO */
2494 report_counts_siginfo(int signum _U_)
2496 int sav_errno = errno;
2497 /* If we've been told to delay printing, just set a flag asking
2498 that we print counts (if we're supposed to), otherwise print
2499 the count of packets captured (if we're supposed to). */
2506 #endif /* SIGINFO */
2509 /* capture child detected any packet drops? */
2511 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2513 if (print_packet_counts) {
2514 /* We're printing packet counts to stderr.
2515 Send a newline so that we move to the line after the packet count. */
2516 fprintf(stderr, "\n");
2520 /* We're printing packet counts to stderr.
2521 Send a newline so that we move to the line after the packet count. */
2522 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2528 * Capture child closed its side of the pipe, report any error and
2529 * do the required cleanup.
2532 capture_input_closed(capture_options *capture_opts, gchar *msg)
2534 capture_file *cf = (capture_file *) capture_opts->cf;
2537 fprintf(stderr, "tshark: %s\n", msg);
2541 if (cf != NULL && cf->wth != NULL) {
2542 wtap_close(cf->wth);
2543 if (cf->is_tempfile) {
2544 ws_unlink(cf->filename);
2547 #ifdef USE_BROKEN_G_MAIN_LOOP
2548 /*g_main_loop_quit(loop);*/
2551 loop_running = FALSE;
2560 capture_cleanup(DWORD ctrltype _U_)
2562 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2563 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2564 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2565 like SIGTERM at least when the machine's shutting down.
2567 For now, we handle them all as indications that we should clean up
2568 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2571 We must return TRUE so that no other handler - such as one that would
2572 terminate the process - gets called.
2574 XXX - for some reason, typing ^C to TShark, if you run this in
2575 a Cygwin console window in at least some versions of Cygwin,
2576 causes TShark to terminate immediately; this routine gets
2577 called, but the main loop doesn't get a chance to run and
2578 exit cleanly, at least if this is compiled with Microsoft Visual
2579 C++ (i.e., it's a property of the Cygwin console window or Bash;
2580 it happens if TShark is not built with Cygwin - for all I know,
2581 building it with Cygwin may make the problem go away). */
2583 /* tell the capture child to stop */
2584 sync_pipe_stop(&global_capture_opts);
2586 /* don't stop our own loop already here, otherwise status messages and
2587 * cleanup wouldn't be done properly. The child will indicate the stop of
2588 * everything by calling capture_input_closed() later */
2594 capture_cleanup(int signum _U_)
2596 /* tell the capture child to stop */
2597 sync_pipe_stop(&global_capture_opts);
2599 /* don't stop our own loop already here, otherwise status messages and
2600 * cleanup wouldn't be done properly. The child will indicate the stop of
2601 * everything by calling capture_input_closed() later */
2604 #endif /* HAVE_LIBPCAP */
2607 process_packet_first_pass(capture_file *cf,
2608 gint64 offset, struct wtap_pkthdr *whdr,
2613 gboolean create_proto_tree = FALSE;
2617 /* The frame number of this packet is one more than the count of
2618 frames in this packet. */
2619 framenum = cf->count + 1;
2621 /* If we're not running a display filter and we're not printing any
2622 packet information, we don't need to do a dissection. This means
2623 that all packets can be marked as 'passed'. */
2626 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2628 /* If we're going to print packet information, or we're going to
2629 run a read filter, or we're going to process taps, set up to
2630 do a dissection and do so. */
2631 if (do_dissection) {
2632 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2633 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2634 /* Grab any resolved addresses */
2635 host_name_lookup_process();
2637 /* If we're going to be applying a read filter, we'll need to
2638 create a protocol tree against which to apply the filter. */
2640 create_proto_tree = TRUE;
2642 /* We're not going to display the protocol tree on this pass,
2643 so it's not going to be "visible". */
2644 epan_dissect_init(&edt, create_proto_tree, FALSE);
2646 /* If we're running a read filter, prime the epan_dissect_t with that
2649 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2651 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2652 &first_ts, prev_dis, prev_cap);
2654 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2656 /* Run the read filter if we have one. */
2658 passed = dfilter_apply_edt(cf->rfcode, &edt);
2662 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2663 prev_dis_frame = fdlocal;
2664 prev_dis = &prev_dis_frame;
2665 frame_data_sequence_add(cf->frames, &fdlocal);
2669 prev_cap_frame = fdlocal;
2670 prev_cap = &prev_cap_frame;
2673 epan_dissect_cleanup(&edt);
2679 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2680 struct wtap_pkthdr *phdr, const guchar *pd,
2681 gboolean filtering_tap_listeners, guint tap_flags)
2683 gboolean create_proto_tree;
2688 /* If we're not running a display filter and we're not printing any
2689 packet information, we don't need to do a dissection. This means
2690 that all packets can be marked as 'passed'. */
2693 /* If we're going to print packet information, or we're going to
2694 run a read filter, or we're going to process taps, set up to
2695 do a dissection and do so. */
2696 if (do_dissection) {
2697 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2698 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2699 /* Grab any resolved addresses */
2700 host_name_lookup_process();
2702 if (cf->rfcode || print_details || filtering_tap_listeners ||
2703 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2704 create_proto_tree = TRUE;
2706 create_proto_tree = FALSE;
2708 /* The protocol tree will be "visible", i.e., printed, only if we're
2709 printing packet details, which is true if we're printing stuff
2710 ("print_packet_info" is true) and we're in verbose mode
2711 ("packet_details" is true). */
2712 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2714 /* If we're running a read filter, prime the epan_dissect_t with that
2717 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2719 col_custom_prime_edt(&edt, &cf->cinfo);
2721 /* We only need the columns if either
2722 1) some tap needs the columns
2724 2) we're printing packet info but we're *not* verbose; in verbose
2725 mode, we print the protocol tree, not the protocol summary.
2727 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2732 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2734 /* Run the read filter if we have one. */
2736 passed = dfilter_apply_edt(cf->rfcode, &edt);
2740 /* Process this packet. */
2741 if (print_packet_info) {
2742 /* We're printing packet information; print the information for
2745 print_packet(cf, &edt);
2747 print_packet(cf, NULL);
2749 /* The ANSI C standard does not appear to *require* that a line-buffered
2750 stream be flushed to the host environment whenever a newline is
2751 written, it just says that, on such a stream, characters "are
2752 intended to be transmitted to or from the host environment as a
2753 block when a new-line character is encountered".
2755 The Visual C++ 6.0 C implementation doesn't do what is intended;
2756 even if you set a stream to be line-buffered, it still doesn't
2757 flush the buffer at the end of every line.
2759 So, if the "-l" flag was specified, we flush the standard output
2760 at the end of a packet. This will do the right thing if we're
2761 printing packet summary lines, and, as we print the entire protocol
2762 tree for a single packet without waiting for anything to happen,
2763 it should be as good as line-buffered mode if we're printing
2764 protocol trees. (The whole reason for the "-l" flag in either
2765 tcpdump or TShark is to allow the output of a live capture to
2766 be piped to a program or script and to have that script see the
2767 information for the packet as soon as it's printed, rather than
2768 having to wait until a standard I/O buffer fills up. */
2772 if (ferror(stdout)) {
2773 show_print_file_io_error(errno);
2779 if (do_dissection) {
2780 epan_dissect_cleanup(&edt);
2786 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2787 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2790 int snapshot_length;
2794 gchar *err_info = NULL;
2796 char *save_file_string = NULL;
2797 gboolean filtering_tap_listeners;
2799 wtapng_section_t *shb_hdr;
2800 wtapng_iface_descriptions_t *idb_inf;
2803 shb_hdr = wtap_file_get_shb_info(cf->wth);
2804 idb_inf = wtap_file_get_idb_info(cf->wth);
2805 #ifdef PCAP_NG_DEFAULT
2806 if (idb_inf->number_of_interfaces > 0) {
2807 linktype = WTAP_ENCAP_PER_PACKET;
2809 linktype = wtap_file_encap(cf->wth);
2812 linktype = wtap_file_encap(cf->wth);
2814 if (save_file != NULL) {
2815 /* Get a string that describes what we're writing to */
2816 save_file_string = output_file_description(save_file);
2818 /* Set up to write to the capture file. */
2819 snapshot_length = wtap_snapshot_length(cf->wth);
2820 if (snapshot_length == 0) {
2821 /* Snapshot length of input file not known. */
2822 snapshot_length = WTAP_MAX_PACKET_SIZE;
2824 /* If we don't have an application name add Tshark */
2825 if (shb_hdr->shb_user_appl == NULL) {
2826 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2827 shb_hdr->shb_user_appl = appname;
2830 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2831 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2837 /* We couldn't set up to write to the capture file. */
2840 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2841 cmdarg_err("Capture files can't be written in that format.");
2844 case WTAP_ERR_UNSUPPORTED_ENCAP:
2845 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2846 cmdarg_err("The capture file being read can't be written as a "
2847 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2850 case WTAP_ERR_CANT_OPEN:
2851 cmdarg_err("The %s couldn't be created for some "
2852 "unknown reason.", save_file_string);
2855 case WTAP_ERR_SHORT_WRITE:
2856 cmdarg_err("A full header couldn't be written to the %s.",
2861 cmdarg_err("The %s could not be created: %s.", save_file_string,
2862 wtap_strerror(err));
2868 if (print_packet_info) {
2869 if (!write_preamble(cf)) {
2871 show_print_file_io_error(err);
2878 if (pdh && out_file_name_res) {
2879 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2880 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2881 wtap_file_type_short_string(out_file_type));
2885 /* Do we have any tap listeners with filters? */
2886 filtering_tap_listeners = have_filtering_tap_listeners();
2888 /* Get the union of the flags for all tap listeners. */
2889 tap_flags = union_of_tap_listener_flags();
2891 if (perform_two_pass_analysis) {
2893 int old_max_packet_count = max_packet_count;
2895 /* Allocate a frame_data_sequence for all the frames. */
2896 cf->frames = new_frame_data_sequence();
2898 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2899 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2900 wtap_buf_ptr(cf->wth))) {
2901 /* Stop reading if we have the maximum number of packets;
2902 * When the -c option has not been used, max_packet_count
2903 * starts at 0, which practically means, never stop reading.
2904 * (unless we roll over max_packet_count ?)
2906 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2907 err = 0; /* This is not an error */
2913 /* Close the sequential I/O side, to free up memory it requires. */
2914 wtap_sequential_close(cf->wth);
2916 /* Allow the protocol dissectors to free up memory that they
2917 * don't need after the sequential run-through of the packets. */
2918 postseq_cleanup_all_protocols();
2920 max_packet_count = old_max_packet_count;
2922 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2923 fdata = frame_data_sequence_find(cf->frames, framenum);
2924 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2925 cf->pd, fdata->cap_len, &err, &err_info)) {
2926 if (process_packet_second_pass(cf, fdata,
2928 filtering_tap_listeners, tap_flags)) {
2929 /* Either there's no read filtering or this packet passed the
2930 filter, so, if we're writing to a capture file, write
2933 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2934 /* Error writing to a capture file */
2937 case WTAP_ERR_UNSUPPORTED_ENCAP:
2939 * This is a problem with the particular frame we're writing;
2940 * note that, and give the frame number.
2942 * XXX - framenum is not necessarily the frame number in
2943 * the input file if there was a read filter.
2946 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2947 framenum, cf->filename,
2948 wtap_file_type_short_string(out_file_type));
2952 show_capture_file_io_error(save_file, err, FALSE);
2955 wtap_dump_close(pdh, &err);
2960 /* Stop reading if we have the maximum number of packets;
2961 * When the -c option has not been used, max_packet_count
2962 * starts at 0, which practically means, never stop reading.
2963 * (unless we roll over max_packet_count ?)
2965 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2966 err = 0; /* This is not an error */
2975 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2978 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2979 wtap_buf_ptr(cf->wth),
2980 filtering_tap_listeners, tap_flags)) {
2981 /* Either there's no read filtering or this packet passed the
2982 filter, so, if we're writing to a capture file, write
2985 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2986 /* Error writing to a capture file */
2989 case WTAP_ERR_UNSUPPORTED_ENCAP:
2991 * This is a problem with the particular frame we're writing;
2992 * note that, and give the frame number.
2995 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2996 framenum, cf->filename,
2997 wtap_file_type_short_string(out_file_type));
3001 show_capture_file_io_error(save_file, err, FALSE);
3004 wtap_dump_close(pdh, &err);
3009 /* Stop reading if we have the maximum number of packets;
3010 * When the -c option has not been used, max_packet_count
3011 * starts at 0, which practically means, never stop reading.
3012 * (unless we roll over max_packet_count ?)
3014 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3015 err = 0; /* This is not an error */
3024 * Print a message noting that the read failed somewhere along the line.
3026 * If we're printing packet data, and the standard output and error are
3027 * going to the same place, flush the standard output, so everything
3028 * buffered up is written, and then print a newline to the standard error
3029 * before printing the error message, to separate it from the packet
3030 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3031 * the _fstat() documentation at Microsoft doesn't indicate whether
3032 * st_ino is even supported.)
3035 if (print_packet_info) {
3036 struct stat stat_stdout, stat_stderr;
3038 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3039 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3040 stat_stdout.st_ino == stat_stderr.st_ino) {
3042 fprintf(stderr, "\n");
3049 case WTAP_ERR_UNSUPPORTED:
3050 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3051 cf->filename, err_info);
3055 case WTAP_ERR_UNSUPPORTED_ENCAP:
3056 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3057 cf->filename, err_info);
3061 case WTAP_ERR_CANT_READ:
3062 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3066 case WTAP_ERR_SHORT_READ:
3067 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3071 case WTAP_ERR_BAD_FILE:
3072 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3073 cf->filename, err_info);
3077 case WTAP_ERR_DECOMPRESS:
3078 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3079 "(%s)", cf->filename, err_info);
3083 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3084 cf->filename, wtap_strerror(err));
3087 if (save_file != NULL) {
3088 /* Now close the capture file. */
3089 if (!wtap_dump_close(pdh, &err))
3090 show_capture_file_io_error(save_file, err, TRUE);
3093 if (save_file != NULL) {
3094 /* Now close the capture file. */
3095 if (!wtap_dump_close(pdh, &err))
3096 show_capture_file_io_error(save_file, err, TRUE);
3098 if (print_packet_info) {
3099 if (!write_finale()) {
3101 show_print_file_io_error(err);
3108 wtap_close(cf->wth);
3111 g_free(save_file_string);
3118 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3120 gboolean filtering_tap_listeners, guint tap_flags)
3123 gboolean create_proto_tree;
3128 /* Count this packet. */
3131 /* If we're not running a display filter and we're not printing any
3132 packet information, we don't need to do a dissection. This means
3133 that all packets can be marked as 'passed'. */
3136 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3138 /* If we're going to print packet information, or we're going to
3139 run a read filter, or we're going to process taps, set up to
3140 do a dissection and do so. */
3141 if (do_dissection) {
3142 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3143 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3144 /* Grab any resolved addresses */
3145 host_name_lookup_process();
3147 if (cf->rfcode || print_details || filtering_tap_listeners ||
3148 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3149 create_proto_tree = TRUE;
3151 create_proto_tree = FALSE;
3153 /* The protocol tree will be "visible", i.e., printed, only if we're
3154 printing packet details, which is true if we're printing stuff
3155 ("print_packet_info" is true) and we're in verbose mode
3156 ("packet_details" is true). */
3157 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3159 /* If we're running a read filter, prime the epan_dissect_t with that
3162 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3164 col_custom_prime_edt(&edt, &cf->cinfo);
3166 /* We only need the columns if either
3167 1) some tap needs the columns
3169 2) we're printing packet info but we're *not* verbose; in verbose
3170 mode, we print the protocol tree, not the protocol summary.
3172 3) there is a column mapped as an individual field */
3173 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3178 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3179 &first_ts, prev_dis, prev_cap);
3181 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3183 /* Run the read filter if we have one. */
3185 passed = dfilter_apply_edt(cf->rfcode, &edt);
3189 frame_data_set_after_dissect(&fdata, &cum_bytes);
3190 prev_dis_frame = fdata;
3191 prev_dis = &prev_dis_frame;
3193 /* Process this packet. */
3194 if (print_packet_info) {
3195 /* We're printing packet information; print the information for
3198 print_packet(cf, &edt);
3200 print_packet(cf, NULL);
3202 /* The ANSI C standard does not appear to *require* that a line-buffered
3203 stream be flushed to the host environment whenever a newline is
3204 written, it just says that, on such a stream, characters "are
3205 intended to be transmitted to or from the host environment as a
3206 block when a new-line character is encountered".
3208 The Visual C++ 6.0 C implementation doesn't do what is intended;
3209 even if you set a stream to be line-buffered, it still doesn't
3210 flush the buffer at the end of every line.
3212 So, if the "-l" flag was specified, we flush the standard output
3213 at the end of a packet. This will do the right thing if we're
3214 printing packet summary lines, and, as we print the entire protocol
3215 tree for a single packet without waiting for anything to happen,
3216 it should be as good as line-buffered mode if we're printing
3217 protocol trees. (The whole reason for the "-l" flag in either
3218 tcpdump or TShark is to allow the output of a live capture to
3219 be piped to a program or script and to have that script see the
3220 information for the packet as soon as it's printed, rather than
3221 having to wait until a standard I/O buffer fills up. */
3225 if (ferror(stdout)) {
3226 show_print_file_io_error(errno);
3232 prev_cap_frame = fdata;
3233 prev_cap = &prev_cap_frame;
3235 if (do_dissection) {
3236 epan_dissect_cleanup(&edt);
3237 frame_data_cleanup(&fdata);
3243 write_preamble(capture_file *cf)
3245 switch (output_action) {
3248 return print_preamble(print_stream, cf ? cf->filename : NULL);
3252 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3254 write_psml_preamble(stdout);
3255 return !ferror(stdout);
3258 write_fields_preamble(output_fields, stdout);
3259 return !ferror(stdout);
3262 g_assert_not_reached();
3268 get_line_buf(size_t len)
3270 static char *line_bufp = NULL;
3271 static size_t line_buf_len = 256;
3272 size_t new_line_buf_len;
3274 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3275 new_line_buf_len *= 2)
3277 if (line_bufp == NULL) {
3278 line_buf_len = new_line_buf_len;
3279 line_bufp = g_malloc(line_buf_len + 1);
3281 if (new_line_buf_len > line_buf_len) {
3282 line_buf_len = new_line_buf_len;
3283 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3290 print_columns(capture_file *cf)
3297 line_bufp = get_line_buf(256);
3300 for (i = 0; i < cf->cinfo.num_cols; i++) {
3301 /* Skip columns not marked as visible. */
3302 if (!get_column_visible(i))
3304 switch (cf->cinfo.col_fmt[i]) {
3308 * Don't print this if we're doing a live capture from a network
3309 * interface - if we're doing a live capture, you won't be
3310 * able to look at the capture in the future (it's not being
3311 * saved anywhere), so the frame numbers are unlikely to be
3314 * (XXX - it might be nice to be able to save and print at
3315 * the same time, sort of like an "Update list of packets
3316 * in real time" capture in Wireshark.)
3318 if (global_capture_opts.ifaces->len > 0)
3321 column_len = strlen(cf->cinfo.col_data[i]);
3324 line_bufp = get_line_buf(buf_offset + column_len);
3325 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3331 case COL_ABS_DATE_TIME:
3333 case COL_UTC_DATE_TIME: /* XXX - wider */
3334 column_len = strlen(cf->cinfo.col_data[i]);
3335 if (column_len < 10)
3337 line_bufp = get_line_buf(buf_offset + column_len);
3338 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3344 case COL_DEF_DL_SRC:
3345 case COL_RES_DL_SRC:
3346 case COL_UNRES_DL_SRC:
3347 case COL_DEF_NET_SRC:
3348 case COL_RES_NET_SRC:
3349 case COL_UNRES_NET_SRC:
3350 column_len = strlen(cf->cinfo.col_data[i]);
3351 if (column_len < 12)
3353 line_bufp = get_line_buf(buf_offset + column_len);
3354 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3360 case COL_DEF_DL_DST:
3361 case COL_RES_DL_DST:
3362 case COL_UNRES_DL_DST:
3363 case COL_DEF_NET_DST:
3364 case COL_RES_NET_DST:
3365 case COL_UNRES_NET_DST:
3366 column_len = strlen(cf->cinfo.col_data[i]);
3367 if (column_len < 12)
3369 line_bufp = get_line_buf(buf_offset + column_len);
3370 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3374 column_len = strlen(cf->cinfo.col_data[i]);
3375 line_bufp = get_line_buf(buf_offset + column_len);
3376 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3379 buf_offset += column_len;
3380 if (i != cf->cinfo.num_cols - 1) {
3382 * This isn't the last column, so we need to print a
3383 * separator between this column and the next.
3385 * If we printed a network source and are printing a
3386 * network destination of the same type next, separate
3387 * them with " -> "; if we printed a network destination
3388 * and are printing a network source of the same type
3389 * next, separate them with " <- "; otherwise separate them
3392 * We add enough space to the buffer for " <- " or " -> ",
3393 * even if we're only adding " ".
3395 line_bufp = get_line_buf(buf_offset + 4);
3396 switch (cf->cinfo.col_fmt[i]) {
3401 switch (cf->cinfo.col_fmt[i + 1]) {
3406 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3411 g_strlcat(line_bufp + buf_offset, " ", 5);
3417 case COL_DEF_DL_SRC:
3418 case COL_RES_DL_SRC:
3419 case COL_UNRES_DL_SRC:
3420 switch (cf->cinfo.col_fmt[i + 1]) {
3422 case COL_DEF_DL_DST:
3423 case COL_RES_DL_DST:
3424 case COL_UNRES_DL_DST:
3425 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3430 g_strlcat(line_bufp + buf_offset, " ", 5);
3436 case COL_DEF_NET_SRC:
3437 case COL_RES_NET_SRC:
3438 case COL_UNRES_NET_SRC:
3439 switch (cf->cinfo.col_fmt[i + 1]) {
3441 case COL_DEF_NET_DST:
3442 case COL_RES_NET_DST:
3443 case COL_UNRES_NET_DST:
3444 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3449 g_strlcat(line_bufp + buf_offset, " ", 5);
3458 switch (cf->cinfo.col_fmt[i + 1]) {
3463 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3468 g_strlcat(line_bufp + buf_offset, " ", 5);
3474 case COL_DEF_DL_DST:
3475 case COL_RES_DL_DST:
3476 case COL_UNRES_DL_DST:
3477 switch (cf->cinfo.col_fmt[i + 1]) {
3479 case COL_DEF_DL_SRC:
3480 case COL_RES_DL_SRC:
3481 case COL_UNRES_DL_SRC:
3482 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3487 g_strlcat(line_bufp + buf_offset, " ", 5);
3493 case COL_DEF_NET_DST:
3494 case COL_RES_NET_DST:
3495 case COL_UNRES_NET_DST:
3496 switch (cf->cinfo.col_fmt[i + 1]) {
3498 case COL_DEF_NET_SRC:
3499 case COL_RES_NET_SRC:
3500 case COL_UNRES_NET_SRC:
3501 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3506 g_strlcat(line_bufp + buf_offset, " ", 5);
3513 g_strlcat(line_bufp + buf_offset, " ", 5);
3519 return print_line(print_stream, 0, line_bufp);
3523 print_packet(capture_file *cf, epan_dissect_t *edt)
3525 print_args_t print_args;
3527 if (print_summary || output_fields_has_cols(output_fields)) {
3528 /* Just fill in the columns. */
3529 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3531 if (print_summary) {
3532 /* Now print them. */
3533 switch (output_action) {
3536 if (!print_columns(cf))
3541 proto_tree_write_psml(edt, stdout);
3542 return !ferror(stdout);
3543 case WRITE_FIELDS: /*No non-verbose "fields" format */
3544 g_assert_not_reached();
3549 if (print_details) {
3550 /* Print the information in the protocol tree. */
3551 switch (output_action) {
3554 /* Only initialize the fields that are actually used in proto_tree_print.
3555 * This is particularly important for .range, as that's heap memory which
3556 * we would otherwise have to g_free().
3557 print_args.to_file = TRUE;
3558 print_args.format = print_format;
3559 print_args.print_summary = print_summary;
3560 print_args.print_formfeed = FALSE;
3561 packet_range_init(&print_args.range, &cfile);
3563 print_args.print_hex = print_hex;
3564 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3566 if (!proto_tree_print(&print_args, edt, print_stream))
3569 if (!print_line(print_stream, 0, separator))
3575 proto_tree_write_pdml(edt, stdout);
3577 return !ferror(stdout);
3579 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3581 return !ferror(stdout);
3585 if (print_summary || print_details) {
3586 if (!print_line(print_stream, 0, ""))
3589 if (!print_hex_data(print_stream, edt))
3591 if (!print_line(print_stream, 0, separator))
3600 switch (output_action) {
3603 return print_finale(print_stream);
3607 write_pdml_finale(stdout);
3609 write_psml_finale(stdout);
3610 return !ferror(stdout);
3613 write_fields_finale(output_fields, stdout);
3614 return !ferror(stdout);
3617 g_assert_not_reached();
3623 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3627 char err_msg[2048+1];
3629 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3633 /* The open succeeded. Fill in the information for this file. */
3635 /* Cleanup all data structures used for dissection. */
3636 cleanup_dissection();
3637 /* Initialize all data structures used for dissection. */
3641 cf->f_datalen = 0; /* not used, but set it anyway */
3643 /* Set the file name because we need it to set the follow stream filter.
3644 XXX - is that still true? We need it for other reasons, though,
3646 cf->filename = g_strdup(fname);
3648 /* Indicate whether it's a permanent or temporary file. */
3649 cf->is_tempfile = is_tempfile;
3651 /* No user changes yet. */
3652 cf->unsaved_changes = FALSE;
3654 cf->cd_t = wtap_file_type(cf->wth);
3656 cf->drops_known = FALSE;
3658 cf->snap = wtap_snapshot_length(cf->wth);
3659 if (cf->snap == 0) {
3660 /* Snapshot length not known. */
3661 cf->has_snap = FALSE;
3662 cf->snap = WTAP_MAX_PACKET_SIZE;
3664 cf->has_snap = TRUE;
3665 nstime_set_zero(&cf->elapsed_time);
3666 nstime_set_unset(&first_ts);
3670 cf->state = FILE_READ_IN_PROGRESS;
3672 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3673 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3678 g_snprintf(err_msg, sizeof err_msg,
3679 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3680 cmdarg_err("%s", err_msg);
3685 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3687 char *save_file_string;
3689 save_file_string = output_file_description(fname);
3694 cmdarg_err("Not all the packets could be written to the %s because there is "
3695 "no space left on the file system.",
3701 cmdarg_err("Not all the packets could be written to the %s because you are "
3702 "too close to, or over your disk quota.",
3707 case WTAP_ERR_CANT_CLOSE:
3708 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3712 case WTAP_ERR_SHORT_WRITE:
3713 cmdarg_err("Not all the packets could be written to the %s.",
3719 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3720 wtap_strerror(err));
3722 cmdarg_err("An error occurred while writing to the %s: %s.",
3723 save_file_string, wtap_strerror(err));
3727 g_free(save_file_string);
3731 show_print_file_io_error(int err)
3736 cmdarg_err("Not all the packets could be printed because there is "
3737 "no space left on the file system.");
3742 cmdarg_err("Not all the packets could be printed because you are "
3743 "too close to, or over your disk quota.");
3748 cmdarg_err("An error occurred while printing packets: %s.",
3755 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3759 static char errmsg_errno[1024+1];
3762 /* Wiretap error. */
3765 case WTAP_ERR_NOT_REGULAR_FILE:
3766 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3769 case WTAP_ERR_RANDOM_OPEN_PIPE:
3770 /* Seen only when opening a capture file for reading. */
3771 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3774 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3775 /* Seen only when opening a capture file for reading. */
3776 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3779 case WTAP_ERR_UNSUPPORTED:
3780 /* Seen only when opening a capture file for reading. */
3781 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3782 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3785 errmsg = errmsg_errno;
3788 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3789 /* Seen only when opening a capture file for writing. */
3790 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3791 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3792 "written to a pipe.", wtap_file_type_short_string(file_type));
3793 errmsg = errmsg_errno;
3796 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3797 /* Seen only when opening a capture file for writing. */
3798 errmsg = "TShark doesn't support writing capture files in that format.";
3801 case WTAP_ERR_UNSUPPORTED_ENCAP:
3803 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3804 "TShark can't save this capture as a \"%s\" file.",
3805 wtap_file_type_short_string(file_type));
3807 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3808 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3812 errmsg = errmsg_errno;
3815 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3817 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3818 "TShark can't save this capture as a \"%s\" file.",
3819 wtap_file_type_short_string(file_type));
3820 errmsg = errmsg_errno;
3822 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3825 case WTAP_ERR_BAD_FILE:
3826 /* Seen only when opening a capture file for reading. */
3827 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3828 "The file \"%%s\" appears to be damaged or corrupt.\n"
3831 errmsg = errmsg_errno;
3834 case WTAP_ERR_CANT_OPEN:
3836 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3838 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3841 case WTAP_ERR_SHORT_READ:
3842 errmsg = "The file \"%s\" appears to have been cut short"
3843 " in the middle of a packet or other data.";
3846 case WTAP_ERR_SHORT_WRITE:
3847 errmsg = "A full header couldn't be written to the file \"%s\".";
3850 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3851 errmsg = "This file type cannot be written as a compressed file.";
3854 case WTAP_ERR_DECOMPRESS:
3855 /* Seen only when opening a capture file for reading. */
3856 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3857 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3860 errmsg = errmsg_errno;
3864 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3865 "The file \"%%s\" could not be %s: %s.",
3866 for_writing ? "created" : "opened",
3867 wtap_strerror(err));
3868 errmsg = errmsg_errno;
3872 errmsg = file_open_error_message(err, for_writing);
3877 * Open/create errors are reported with an console message in TShark.
3880 open_failure_message(const char *filename, int err, gboolean for_writing)
3882 fprintf(stderr, "tshark: ");
3883 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3884 fprintf(stderr, "\n");
3889 * General errors are reported with an console message in TShark.
3892 failure_message(const char *msg_format, va_list ap)
3894 fprintf(stderr, "tshark: ");
3895 vfprintf(stderr, msg_format, ap);
3896 fprintf(stderr, "\n");
3900 * Read errors are reported with an console message in TShark.
3903 read_failure_message(const char *filename, int err)
3905 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3906 filename, g_strerror(err));
3910 * Write errors are reported with an console message in TShark.
3913 write_failure_message(const char *filename, int err)
3915 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3916 filename, g_strerror(err));
3920 * Print to the standard error. This is a command-line tool, so there's
3921 * no need to pop up a console.
3924 vfprintf_stderr(const char *fmt, va_list ap)
3926 vfprintf(stderr, fmt, ap);
3930 fprintf_stderr(const char *fmt, ...)
3935 vfprintf_stderr(fmt, ap);
3940 * Report an error in command-line arguments.
3943 cmdarg_err(const char *fmt, ...)
3948 failure_message(fmt, ap);
3953 * Report additional information for an error in command-line arguments.
3956 cmdarg_err_cont(const char *fmt, ...)
3961 vfprintf(stderr, fmt, ap);
3962 fprintf(stderr, "\n");
3968 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3973 * indent-tabs-mode: nil
3976 * vi: set shiftwidth=2 tabstop=8 expandtab:
3977 * :indentSize=2:tabSize=8:noTabs=true: