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-int.h>
58 #include <epan/epan.h>
59 #include <epan/filesystem.h>
60 #include <wsutil/crash_info.h>
61 #include <wsutil/privileges.h>
62 #include <wsutil/file_util.h>
65 #include <epan/timestamp.h>
66 #include <epan/packet.h>
68 #include "frame_tvbuff.h"
69 #include <epan/disabled_protos.h>
70 #include <epan/prefs.h>
71 #include <epan/column.h>
72 #include <epan/print.h>
73 #include <epan/addr_resolv.h>
75 #include "clopts_common.h"
76 #include "cmdarg_err.h"
77 #include "version_info.h"
78 #include <epan/plugins.h>
80 #include <epan/epan_dissect.h>
82 #include <epan/stat_cmd_args.h>
83 #include <epan/timestamp.h>
84 #include <epan/ex-opt.h>
87 #include "capture_ui_utils.h"
88 #include "capture_ifinfo.h"
89 #include "capture-pcap-util.h"
91 #include "capture-wpcap.h"
92 #include <wsutil/unicode-utils.h>
94 #include "capture_session.h"
95 #include "capture_sync.h"
96 #include "capture_opts.h"
97 #endif /* HAVE_LIBPCAP */
99 #include <epan/funnel.h>
102 * This is the template for the decode as option; it is shared between the
103 * various functions that output the usage for this parameter.
105 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
107 static guint32 cum_bytes;
108 static const frame_data *ref;
109 static frame_data ref_frame;
110 static frame_data *prev_dis;
111 static frame_data prev_dis_frame;
112 static frame_data *prev_cap;
113 static frame_data prev_cap_frame;
115 static const char* prev_display_dissector_name = NULL;
117 static gboolean perform_two_pass_analysis;
120 * The way the packet decode is to be written.
123 WRITE_TEXT, /* summary or detail text */
124 WRITE_XML, /* PDML or PSML */
125 WRITE_FIELDS /* User defined list of fields */
126 /* Add CSV and the like here */
129 static output_action_e output_action;
130 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
131 static gboolean print_packet_info; /* TRUE if we're to print packet information */
132 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
133 static gboolean print_details; /* TRUE if we're to print packet details information */
134 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
135 static gboolean line_buffered;
136 static gboolean really_quiet = FALSE;
138 static print_format_e print_format = PR_FMT_TEXT;
139 static print_stream_t *print_stream;
141 static output_fields_t* output_fields = NULL;
143 /* The line separator used between packets, changeable via the -S option */
144 static const char *separator = "";
148 * TRUE if we're to print packet counts to keep track of captured packets.
150 static gboolean print_packet_counts = TRUE;
152 static capture_options global_capture_opts;
153 static capture_session global_capture_session;
156 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
157 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
160 static gboolean capture(void);
161 static void report_counts(void);
163 static BOOL WINAPI capture_cleanup(DWORD);
165 static void capture_cleanup(int);
167 static void report_counts_siginfo(int);
170 #endif /* HAVE_LIBPCAP */
172 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
173 static gboolean process_packet(capture_file *cf, gint64 offset,
174 struct wtap_pkthdr *whdr, const guchar *pd,
175 gboolean filtering_tap_listeners, guint tap_flags);
176 static void show_capture_file_io_error(const char *, int, gboolean);
177 static void show_print_file_io_error(int err);
178 static gboolean write_preamble(capture_file *cf);
179 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
180 static gboolean write_finale(void);
181 static const char *cf_open_error_message(int err, gchar *err_info,
182 gboolean for_writing, int file_type);
184 static void open_failure_message(const char *filename, int err,
185 gboolean for_writing);
186 static void failure_message(const char *msg_format, va_list ap);
187 static void read_failure_message(const char *filename, int err);
188 static void write_failure_message(const char *filename, int err);
193 const char *sstr; /* The short string */
194 const char *lstr; /* The long string */
198 string_compare(gconstpointer a, gconstpointer b)
200 return strcmp(((const struct string_elem *)a)->sstr,
201 ((const struct string_elem *)b)->sstr);
205 string_elem_print(gpointer data, gpointer not_used _U_)
207 fprintf(stderr, " %s - %s\n",
208 ((struct string_elem *)data)->sstr,
209 ((struct string_elem *)data)->lstr);
213 list_capture_types(void) {
215 struct string_elem *captypes;
218 captypes = g_new(struct string_elem, WTAP_NUM_FILE_TYPES);
220 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
221 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
222 if (wtap_dump_can_open(i)) {
223 captypes[i].sstr = wtap_file_type_short_string(i);
224 captypes[i].lstr = wtap_file_type_string(i);
225 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
228 g_slist_foreach(list, string_elem_print, NULL);
234 print_usage(gboolean print_ver)
241 "TShark " VERSION "%s\n"
242 "Dump and analyze network traffic.\n"
243 "See http://www.wireshark.org for more information.\n"
246 wireshark_svnversion, get_copyright_info());
250 fprintf(output, "\n");
251 fprintf(output, "Usage: tshark [options] ...\n");
252 fprintf(output, "\n");
255 fprintf(output, "Capture interface:\n");
256 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
257 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
258 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
259 fprintf(output, " -p don't capture in promiscuous mode\n");
260 #ifdef HAVE_PCAP_CREATE
261 fprintf(output, " -I capture in monitor mode, if available\n");
263 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
264 fprintf(output, " -B <buffer size> size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
266 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
267 fprintf(output, " -D print list of interfaces and exit\n");
268 fprintf(output, " -L print list of link-layer types of iface and exit\n");
269 fprintf(output, "\n");
270 fprintf(output, "Capture stop conditions:\n");
271 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
272 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
273 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
274 fprintf(output, " files:NUM - stop after NUM files\n");
275 /*fprintf(output, "\n");*/
276 fprintf(output, "Capture output:\n");
277 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
278 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
279 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
280 #endif /* HAVE_LIBPCAP */
281 #ifdef HAVE_PCAP_REMOTE
282 fprintf(output, "RPCAP options:\n");
283 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
285 /*fprintf(output, "\n");*/
286 fprintf(output, "Input file:\n");
287 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
289 fprintf(output, "\n");
290 fprintf(output, "Processing:\n");
291 fprintf(output, " -2 perform a two-pass analysis\n");
292 fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n");
293 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
294 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
295 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
296 fprintf(output, " -d %s ...\n", decode_as_arg_template);
297 fprintf(output, " \"Decode As\", see the man page for details\n");
298 fprintf(output, " Example: tcp.port==8888,http\n");
299 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
300 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
302 /*fprintf(output, "\n");*/
303 fprintf(output, "Output:\n");
304 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
305 fprintf(output, " (or to the standard output for \"-\")\n");
306 fprintf(output, " -C <config profile> start with specified configuration profile\n");
307 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
308 fprintf(output, " an empty \"-F\" option will list the file types\n");
309 fprintf(output, " -V add output of packet tree (Packet Details)\n");
310 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
311 fprintf(output, " separated\n");
312 fprintf(output, " -P print packet summary even when writing to a file\n");
313 fprintf(output, " -S <separator> the line separator to print between packets\n");
314 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
315 fprintf(output, " -T pdml|ps|psml|text|fields\n");
316 fprintf(output, " format of text output (def: text)\n");
317 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
318 fprintf(output, " this option can be repeated to print multiple fields\n");
319 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
320 fprintf(output, " header=y|n switch headers on and off\n");
321 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
322 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
323 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
324 fprintf(output, " aggregator\n");
325 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
326 fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n");
327 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
328 fprintf(output, " -l flush standard output after each packet\n");
329 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
330 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
331 fprintf(output, " -g enable group read access on the output file(s)\n");
332 fprintf(output, " -W n Save extra information in the file, if supported.\n");
333 fprintf(output, " n = write network address resolution information\n");
334 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
335 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
337 fprintf(output, "\n");
338 fprintf(output, "Miscellaneous:\n");
339 fprintf(output, " -h display this help and exit\n");
340 fprintf(output, " -v display version info and exit\n");
341 fprintf(output, " -o <name>:<value> ... override preference setting\n");
342 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
343 fprintf(output, " -G [report] dump one of several available reports and exit\n");
344 fprintf(output, " default report=\"fields\"\n");
345 fprintf(output, " use \"-G ?\" for more help\n");
349 glossary_option_help(void)
355 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
357 fprintf(output, "\n");
358 fprintf(output, "Usage: tshark -G [report]\n");
359 fprintf(output, "\n");
360 fprintf(output, "Glossary table reports:\n");
361 fprintf(output, " -G fields dump fields glossary and exit\n");
362 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
363 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
364 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
365 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
366 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
367 fprintf(output, "\n");
368 fprintf(output, "Preference reports:\n");
369 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
370 fprintf(output, " -G currentprefs dump current preferences and exit\n");
371 fprintf(output, "\n");
375 * For a dissector table, print on the stream described by output,
376 * its short name (which is what's used in the "-d" option) and its
380 display_dissector_table_names(const char *table_name, const char *ui_name,
383 if ((prev_display_dissector_name == NULL) ||
384 (strcmp(prev_display_dissector_name, table_name) != 0)) {
385 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
386 prev_display_dissector_name = table_name;
391 * For a dissector handle, print on the stream described by output,
392 * the filter name (which is what's used in the "-d" option) and the full
393 * name for the protocol that corresponds to this handle.
396 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
399 const gchar *proto_filter_name;
400 const gchar *proto_ui_name;
402 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
404 if (proto_id != -1) {
405 proto_filter_name = proto_get_protocol_filter_name(proto_id);
406 proto_ui_name = proto_get_protocol_name(proto_id);
407 g_assert(proto_filter_name != NULL);
408 g_assert(proto_ui_name != NULL);
410 if ((prev_display_dissector_name == NULL) ||
411 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
412 fprintf((FILE *)output, "\t%s (%s)\n",
415 prev_display_dissector_name = proto_filter_name;
421 * The protocol_name_search structure is used by find_protocol_name_func()
422 * to pass parameters and store results
424 struct protocol_name_search{
425 gchar *searched_name; /* Protocol filter name we are looking for */
426 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
427 guint nb_match; /* How many dissectors matched searched_name */
429 typedef struct protocol_name_search *protocol_name_search_t;
432 * This function parses all dissectors associated with a table to find the
433 * one whose protocol has the specified filter name. It is called
434 * as a reference function in a call to dissector_table_foreach_handle.
435 * The name we are looking for, as well as the results, are stored in the
436 * protocol_name_search struct pointed to by user_data.
437 * If called using dissector_table_foreach_handle, we actually parse the
438 * whole list of dissectors.
441 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
445 const gchar *protocol_filter_name;
446 protocol_name_search_t search_info;
450 search_info = (protocol_name_search_t)user_data;
452 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
453 if (proto_id != -1) {
454 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
455 g_assert(protocol_filter_name != NULL);
456 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
458 if (search_info->nb_match == 0) {
459 /* Record this handle only if this is the first match */
460 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
462 search_info->nb_match++;
468 * Allow dissector key names to be sorted alphabetically
472 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
474 return strcmp((const char*)dissector_a, (const char*)dissector_b);
478 * Print all layer type names supported.
479 * We send the output to the stream described by the handle output.
483 fprint_all_layer_types(FILE *output)
486 prev_display_dissector_name = NULL;
487 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
491 * Print all protocol names supported for a specific layer type.
492 * table_name contains the layer type name in which the search is performed.
493 * We send the output to the stream described by the handle output.
497 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
500 prev_display_dissector_name = NULL;
501 dissector_table_foreach_handle(table_name,
502 display_dissector_names,
507 * The function below parses the command-line parameters for the decode as
508 * feature (a string pointer by cl_param).
509 * It checks the format of the command-line, searches for a matching table
510 * and dissector. If a table/dissector match is not found, we display a
511 * summary of the available tables/dissectors (on stderr) and return FALSE.
512 * If everything is fine, we get the "Decode as" preference activated,
513 * then we return TRUE.
516 add_decode_as(const gchar *cl_param)
519 guint32 selector, selector2;
520 gchar *decoded_param;
521 gchar *remaining_param;
523 gchar *dissector_str;
524 dissector_handle_t dissector_matching;
525 dissector_table_t table_matching;
526 ftenum_t dissector_table_selector_type;
527 struct protocol_name_search user_protocol_name;
531 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
534 decoded_param = g_strdup(cl_param);
535 g_assert(decoded_param);
538 /* The lines below will parse this string (modifying it) to extract all
539 necessary information. Note that decoded_param is still needed since
540 strings are not copied - we just save pointers. */
542 /* This section extracts a layer type (table_name) from decoded_param */
543 table_name = decoded_param; /* Layer type string starts from beginning */
545 remaining_param = strchr(table_name, '=');
546 if (remaining_param == NULL) {
547 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
548 /* If the argument does not follow the template, carry on anyway to check
549 if the table name is at least correct. If remaining_param is NULL,
550 we'll exit anyway further down */
553 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
556 /* Remove leading and trailing spaces from the table name */
557 while ( table_name[0] == ' ' )
559 while ( table_name[strlen(table_name) - 1] == ' ' )
560 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
562 /* The following part searches a table matching with the layer type specified */
563 table_matching = NULL;
565 /* Look for the requested table */
566 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
567 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
570 table_matching = find_dissector_table(table_name);
571 if (!table_matching) {
572 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
576 if (!table_matching) {
577 /* Display a list of supported layer types to help the user, if the
578 specified layer type was not found */
579 cmdarg_err("Valid layer types are:");
580 fprint_all_layer_types(stderr);
582 if (remaining_param == NULL || !table_matching) {
583 /* Exit if the layer type was not found, or if no '=' separator was found
585 g_free(decoded_param);
589 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
590 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
593 remaining_param++; /* Move to the second '=' */
594 *remaining_param = '\0'; /* Remove the second '=' */
596 remaining_param++; /* Position after the layer type string */
598 /* This section extracts a selector value (selector_str) from decoded_param */
600 selector_str = remaining_param; /* Next part starts with the selector number */
602 remaining_param = strchr(selector_str, ',');
603 if (remaining_param == NULL) {
604 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
605 /* If the argument does not follow the template, carry on anyway to check
606 if the selector value is at least correct. If remaining_param is NULL,
607 we'll exit anyway further down */
610 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
613 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
615 switch (dissector_table_selector_type) {
621 /* The selector for this table is an unsigned number. Parse it as such.
622 There's no need to remove leading and trailing spaces from the
623 selector number string, because sscanf will do that for us. */
624 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
629 if (op != ':' && op != '-') {
630 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
631 g_free(decoded_param);
635 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
636 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
637 g_free(decoded_param);
641 else if (selector2 < selector) {
642 /* We could swap them for the user, but maybe it's better to call
643 * this out as an error in case it's not what was intended? */
644 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
645 g_free(decoded_param);
650 cmdarg_err("Invalid selector number \"%s\"", selector_str);
651 g_free(decoded_param);
658 /* The selector for this table is a string. */
662 /* There are currently no dissector tables with any types other
663 than the ones listed above. */
664 g_assert_not_reached();
667 if (remaining_param == NULL) {
668 /* Exit if no ',' separator was found (see above) */
669 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
670 fprint_all_protocols_for_layer_types(stderr, table_name);
671 g_free(decoded_param);
675 remaining_param++; /* Position after the selector number string */
677 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
679 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
681 /* Remove leading and trailing spaces from the dissector name */
682 while ( dissector_str[0] == ' ' )
684 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
685 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
687 dissector_matching = NULL;
689 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
690 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 */
691 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
694 user_protocol_name.nb_match = 0;
695 user_protocol_name.searched_name = dissector_str;
696 user_protocol_name.matched_handle = NULL;
698 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 */
700 if (user_protocol_name.nb_match != 0) {
701 dissector_matching = user_protocol_name.matched_handle;
702 if (user_protocol_name.nb_match > 1) {
703 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
707 /* OK, check whether the problem is that there isn't any such
708 protocol, or that there is but it's not specified as a protocol
709 that's valid for that dissector table.
710 Note, we don't exit here, but dissector_matching will remain NULL,
712 if (proto_get_id_by_filter_name(dissector_str) == -1) {
713 /* No such protocol */
714 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
716 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
717 dissector_str, table_name);
722 if (!dissector_matching) {
723 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
724 fprint_all_protocols_for_layer_types(stderr, table_name);
725 g_free(decoded_param);
729 /* This is the end of the code that parses the command-line options.
730 All information is now stored in the variables:
734 The above variables that are strings are still pointing to areas within
735 decoded_parm. decoded_parm thus still needs to be kept allocated in
736 until we stop needing these variables
737 decoded_param will be deallocated at each exit point of this function */
740 /* We now have a pointer to the handle for the requested dissector
741 (requested protocol) inside the variable dissector_matching */
742 switch (dissector_table_selector_type) {
748 /* The selector for this table is an unsigned number. */
750 dissector_change_uint(table_name, selector, dissector_matching);
751 } else if (op == ':') {
752 for (i = selector; i < (guint64)selector + selector2; i++) {
753 dissector_change_uint(table_name, (guint32)i, dissector_matching);
755 } else { /* op == '-' */
756 for (i = selector; i <= selector2; i++) {
757 dissector_change_uint(table_name, (guint32)i, dissector_matching);
764 /* The selector for this table is a string. */
765 dissector_change_string(table_name, selector_str, dissector_matching);
769 /* There are currently no dissector tables with any types other
770 than the ones listed above. */
771 g_assert_not_reached();
773 g_free(decoded_param); /* "Decode As" rule has been successfully added */
778 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
779 const gchar *message, gpointer user_data)
781 /* ignore log message, if log_level isn't interesting based
782 upon the console log preferences.
783 If the preferences haven't been loaded loaded yet, display the
786 The default console_log_level preference value is such that only
787 ERROR, CRITICAL and WARNING level messages are processed;
788 MESSAGE, INFO and DEBUG level messages are ignored.
790 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
791 ERROR and CRITICAL level messages so the current code is a behavioral
792 change. The current behavior is the same as in Wireshark.
794 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
795 prefs.console_log_level != 0) {
799 g_log_default_handler(log_domain, log_level, message, user_data);
804 output_file_description(const char *fname)
806 char *save_file_string;
808 /* Get a string that describes what we're writing to */
809 if (strcmp(fname, "-") == 0) {
810 /* We're writing to the standard output */
811 save_file_string = g_strdup("standard output");
813 /* We're writing to a file with the name in save_file */
814 save_file_string = g_strdup_printf("file \"%s\"", fname);
816 return save_file_string;
820 print_current_user(void) {
821 gchar *cur_user, *cur_group;
823 if (started_with_special_privs()) {
824 cur_user = get_cur_username();
825 cur_group = get_cur_groupname();
826 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
827 cur_user, cur_group);
830 if (running_with_special_privs()) {
831 fprintf(stderr, " This could be dangerous.");
833 fprintf(stderr, "\n");
838 check_capture_privs(void) {
841 /* Warn the user if npf.sys isn't loaded. */
842 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
843 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
844 "capturing or\nlisting interfaces.\n");
850 show_version(GString *comp_info_str, GString *runtime_info_str)
852 printf("TShark " VERSION "%s\n"
859 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
860 runtime_info_str->str);
864 main(int argc, char *argv[])
866 GString *comp_info_str;
867 GString *runtime_info_str;
868 char *init_progfile_dir_error;
870 gboolean arg_error = FALSE;
876 char *gpf_path, *pf_path;
877 char *gdp_path, *dp_path;
878 int gpf_open_errno, gpf_read_errno;
879 int pf_open_errno, pf_read_errno;
880 int gdp_open_errno, gdp_read_errno;
881 int dp_open_errno, dp_read_errno;
883 volatile int exit_status = 0;
885 gboolean list_link_layer_types = FALSE;
886 gboolean start_capture = FALSE;
891 gboolean capture_option_specified = FALSE;
893 gboolean quiet = FALSE;
894 #ifdef PCAP_NG_DEFAULT
895 volatile int out_file_type = WTAP_FILE_PCAPNG;
897 volatile int out_file_type = WTAP_FILE_PCAP;
899 volatile gboolean out_file_name_res = FALSE;
900 gchar *volatile cf_name = NULL;
901 gchar *rfilter = NULL;
902 gchar *dfilter = NULL;
903 #ifdef HAVE_PCAP_OPEN_DEAD
904 struct bpf_program fcode;
906 dfilter_t *rfcode = NULL;
907 dfilter_t *dfcode = NULL;
912 gchar *output_only = NULL;
914 #ifdef HAVE_PCAP_REMOTE
915 #define OPTSTRING_A "A:"
917 #define OPTSTRING_A ""
920 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
921 #define OPTSTRING_B "B:"
923 #define OPTSTRING_B ""
924 #endif /* _WIN32 or HAVE_PCAP_CREATE */
925 #else /* HAVE_LIBPCAP */
926 #define OPTSTRING_B ""
927 #endif /* HAVE_LIBPCAP */
929 #ifdef HAVE_PCAP_CREATE
930 #define OPTSTRING_I "I"
932 #define OPTSTRING_I ""
935 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:Y:z:"
937 static const char optstring[] = OPTSTRING;
939 /* Assemble the compile-time version information string */
940 comp_info_str = g_string_new("Compiled ");
941 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
943 /* Assemble the run-time version information string */
944 runtime_info_str = g_string_new("Running ");
945 get_runtime_version_info(runtime_info_str, NULL);
947 /* Add it to the information to be reported on a crash. */
948 ws_add_crash_info("TShark " VERSION "%s\n"
953 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
956 arg_list_utf_16to8(argc, argv);
957 create_app_running_mutex();
958 #if !GLIB_CHECK_VERSION(2,31,0)
964 * Get credential information for later use.
966 init_process_policies();
969 * Attempt to get the pathname of the executable file.
971 init_progfile_dir_error = init_progfile_dir(argv[0], main);
972 if (init_progfile_dir_error != NULL) {
973 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
974 init_progfile_dir_error);
978 * In order to have the -X opts assigned before the wslua machine starts
979 * we need to call getopts before epan_init() gets called.
982 optind_initial = optind;
984 while ((opt = getopt(argc, argv, optstring)) != -1) {
986 case 'C': /* Configuration Profile */
987 if (profile_exists (optarg, FALSE)) {
988 set_profile_name (optarg);
990 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
994 case 'P': /* Print packet summary info even when writing to a file */
995 print_packet_info = TRUE;
996 print_summary = TRUE;
998 case 'O': /* Only output these protocols */
999 output_only = g_strdup(optarg);
1001 case 'V': /* Verbose */
1002 print_details = TRUE;
1003 print_packet_info = TRUE;
1005 case 'x': /* Print packet data in hex (and ASCII) */
1007 /* The user asked for hex output, so let's ensure they get it,
1008 * even if they're writing to a file.
1010 print_packet_info = TRUE;
1021 * Print packet summary information is the default, unless either -V or -x
1022 * were specified and -P was not. Note that this is new behavior, which
1023 * allows for the possibility of printing only hex/ascii output without
1024 * necessarily requiring that either the summary or details be printed too.
1026 if (print_summary == -1)
1027 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1029 optind = optind_initial;
1034 /** Send All g_log messages to our own handler **/
1038 G_LOG_LEVEL_CRITICAL|
1039 G_LOG_LEVEL_WARNING|
1040 G_LOG_LEVEL_MESSAGE|
1043 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1045 g_log_set_handler(NULL,
1046 (GLogLevelFlags)log_flags,
1047 tshark_log_handler, NULL /* user_data */);
1048 g_log_set_handler(LOG_DOMAIN_MAIN,
1049 (GLogLevelFlags)log_flags,
1050 tshark_log_handler, NULL /* user_data */);
1053 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1054 (GLogLevelFlags)log_flags,
1055 tshark_log_handler, NULL /* user_data */);
1056 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1057 (GLogLevelFlags)log_flags,
1058 tshark_log_handler, NULL /* user_data */);
1061 initialize_funnel_ops();
1064 capture_opts_init(&global_capture_opts);
1065 capture_session_init(&global_capture_session, (void *)&cfile);
1068 timestamp_set_type(TS_RELATIVE);
1069 timestamp_set_precision(TS_PREC_AUTO);
1070 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1072 /* Register all dissectors; we must do this before checking for the
1073 "-G" flag, as the "-G" flag dumps information registered by the
1074 dissectors, and we must do it before we read the preferences, in
1075 case any dissectors register preferences. */
1076 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1077 failure_message, open_failure_message, read_failure_message,
1078 write_failure_message);
1080 /* Register all tap listeners; we do this before we parse the arguments,
1081 as the "-z" argument can specify a registered tap. */
1083 /* we register the plugin taps before the other taps because
1084 stats_tree taps plugins will be registered as tap listeners
1085 by stats_tree_stat.c and need to registered before that */
1087 register_all_plugin_tap_listeners();
1089 register_all_tap_listeners();
1091 /* If invoked with the "-G" flag, we dump out information based on
1092 the argument to the "-G" flag; if no argument is specified,
1093 for backwards compatibility we dump out a glossary of display
1096 XXX - we do this here, for now, to support "-G" with no arguments.
1097 If none of our build or other processes uses "-G" with no arguments,
1098 we can just process it with the other arguments. */
1099 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1100 proto_initialize_all_prefixes();
1103 proto_registrar_dump_fields();
1105 if (strcmp(argv[2], "fields") == 0)
1106 proto_registrar_dump_fields();
1107 else if (strcmp(argv[2], "protocols") == 0)
1108 proto_registrar_dump_protocols();
1109 else if (strcmp(argv[2], "values") == 0)
1110 proto_registrar_dump_values();
1111 else if (strcmp(argv[2], "ftypes") == 0)
1112 proto_registrar_dump_ftypes();
1113 else if (strcmp(argv[2], "decodes") == 0)
1114 dissector_dump_decodes();
1115 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1116 dissector_dump_heur_decodes();
1117 else if (strcmp(argv[2], "defaultprefs") == 0)
1119 else if (strcmp(argv[2], "plugins") == 0)
1121 else if (strcmp(argv[2], "?") == 0)
1122 glossary_option_help();
1123 else if (strcmp(argv[2], "-?") == 0)
1124 glossary_option_help();
1125 else if (strcmp(argv[2], "currentprefs") == 0) {
1126 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1127 &pf_open_errno, &pf_read_errno, &pf_path);
1130 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1137 /* Set the C-language locale to the native environment. */
1138 setlocale(LC_ALL, "");
1140 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1141 &pf_open_errno, &pf_read_errno, &pf_path);
1142 if (gpf_path != NULL) {
1143 if (gpf_open_errno != 0) {
1144 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1145 pf_path, g_strerror(gpf_open_errno));
1147 if (gpf_read_errno != 0) {
1148 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1149 pf_path, g_strerror(gpf_read_errno));
1152 if (pf_path != NULL) {
1153 if (pf_open_errno != 0) {
1154 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1155 g_strerror(pf_open_errno));
1157 if (pf_read_errno != 0) {
1158 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1159 pf_path, g_strerror(pf_read_errno));
1165 /* Read the disabled protocols file. */
1166 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1167 &dp_path, &dp_open_errno, &dp_read_errno);
1168 if (gdp_path != NULL) {
1169 if (gdp_open_errno != 0) {
1170 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1171 gdp_path, g_strerror(gdp_open_errno));
1173 if (gdp_read_errno != 0) {
1174 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1175 gdp_path, g_strerror(gdp_read_errno));
1179 if (dp_path != NULL) {
1180 if (dp_open_errno != 0) {
1182 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1183 g_strerror(dp_open_errno));
1185 if (dp_read_errno != 0) {
1187 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1188 g_strerror(dp_read_errno));
1193 check_capture_privs();
1195 cap_file_init(&cfile);
1197 /* Print format defaults to this. */
1198 print_format = PR_FMT_TEXT;
1200 output_fields = output_fields_new();
1202 /* Now get our args */
1203 while ((opt = getopt(argc, argv, optstring)) != -1) {
1205 case '2': /* Perform two pass analysis */
1206 perform_two_pass_analysis = TRUE;
1208 case 'a': /* autostop criteria */
1209 case 'b': /* Ringbuffer option */
1210 case 'c': /* Capture x packets */
1211 case 'f': /* capture filter */
1212 case 'g': /* enable group read access on file(s) */
1213 case 'i': /* Use interface x */
1214 case 'p': /* Don't capture in promiscuous mode */
1215 #ifdef HAVE_PCAP_REMOTE
1216 case 'A': /* Authentication */
1218 #ifdef HAVE_PCAP_CREATE
1219 case 'I': /* Capture in monitor mode, if available */
1221 case 's': /* Set the snapshot (capture) length */
1222 case 'w': /* Write to capture file x */
1223 case 'y': /* Set the pcap data link type */
1224 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1225 case 'B': /* Buffer size */
1226 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1228 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1233 capture_option_specified = TRUE;
1238 /* Configuration profile settings were already processed just ignore them this time*/
1240 case 'd': /* Decode as rule */
1241 if (!add_decode_as(optarg))
1244 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1245 case 'K': /* Kerberos keytab file */
1246 read_keytab_file(optarg);
1249 case 'D': /* Print a list of capture devices and exit */
1251 if_list = capture_interface_list(&err, &err_str,NULL);
1252 if (if_list == NULL) {
1254 case CANT_GET_INTERFACE_LIST:
1255 case DONT_HAVE_PCAP:
1256 cmdarg_err("%s", err_str);
1260 case NO_INTERFACES_FOUND:
1261 cmdarg_err("There are no interfaces on which a capture can be done");
1266 capture_opts_print_interfaces(if_list);
1267 free_interface_list(if_list);
1270 capture_option_specified = TRUE;
1276 output_fields_add(output_fields, optarg);
1280 if (!output_fields_set_option(output_fields, optarg)) {
1281 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1282 output_fields_list_options(stderr);
1287 out_file_type = wtap_short_string_to_file_type(optarg);
1288 if (out_file_type < 0) {
1289 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1290 list_capture_types();
1294 case 'W': /* Select extra information to save in our capture file */
1295 /* This is patterned after the -N flag which may not be the best idea. */
1296 if (strchr(optarg, 'n')) {
1297 out_file_name_res = TRUE;
1299 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1303 case 'H': /* Read address to name mappings from a hosts file */
1304 if (! add_hosts_file(optarg))
1306 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1309 out_file_name_res = TRUE;
1312 case 'h': /* Print help and exit */
1316 case 'l': /* "Line-buffer" standard output */
1317 /* This isn't line-buffering, strictly speaking, it's just
1318 flushing the standard output after the information for
1319 each packet is printed; however, that should be good
1320 enough for all the purposes to which "-l" is put (and
1321 is probably actually better for "-V", as it does fewer
1324 See the comment in "process_packet()" for an explanation of
1325 why we do that, and why we don't just use "setvbuf()" to
1326 make the standard output line-buffered (short version: in
1327 Windows, "line-buffered" is the same as "fully-buffered",
1328 and the output buffer is only flushed when it fills up). */
1329 line_buffered = TRUE;
1331 case 'L': /* Print list of link-layer types and exit */
1333 list_link_layer_types = TRUE;
1335 capture_option_specified = TRUE;
1339 case 'n': /* No name resolution */
1340 gbl_resolv_flags.mac_name = FALSE;
1341 gbl_resolv_flags.network_name = FALSE;
1342 gbl_resolv_flags.transport_name = FALSE;
1343 gbl_resolv_flags.concurrent_dns = FALSE;
1345 case 'N': /* Select what types of addresses/port #s to resolve */
1346 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1347 if (badopt != '\0') {
1348 cmdarg_err("-N specifies unknown resolving option '%c';",
1350 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1354 case 'o': /* Override preference from command line */
1355 switch (prefs_set_pref(optarg)) {
1360 case PREFS_SET_SYNTAX_ERR:
1361 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1365 case PREFS_SET_NO_SUCH_PREF:
1366 case PREFS_SET_OBSOLETE:
1367 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1372 case 'q': /* Quiet */
1375 case 'Q': /* Really quiet */
1377 really_quiet = TRUE;
1379 case 'r': /* Read capture file x */
1380 cf_name = g_strdup(optarg);
1382 case 'R': /* Read file filter */
1386 /* already processed; just ignore it now */
1388 case 'S': /* Set the line Separator to be printed between packets */
1389 separator = strdup(optarg);
1391 case 't': /* Time stamp type */
1392 if (strcmp(optarg, "r") == 0)
1393 timestamp_set_type(TS_RELATIVE);
1394 else if (strcmp(optarg, "a") == 0)
1395 timestamp_set_type(TS_ABSOLUTE);
1396 else if (strcmp(optarg, "ad") == 0)
1397 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1398 else if (strcmp(optarg, "d") == 0)
1399 timestamp_set_type(TS_DELTA);
1400 else if (strcmp(optarg, "dd") == 0)
1401 timestamp_set_type(TS_DELTA_DIS);
1402 else if (strcmp(optarg, "e") == 0)
1403 timestamp_set_type(TS_EPOCH);
1404 else if (strcmp(optarg, "u") == 0)
1405 timestamp_set_type(TS_UTC);
1406 else if (strcmp(optarg, "ud") == 0)
1407 timestamp_set_type(TS_UTC_WITH_DATE);
1409 cmdarg_err("Invalid time stamp type \"%s\"",
1411 cmdarg_err_cont("It must be \"a\" for absolute, \"ad\" for absolute with date, \"d\" for delta,");
1412 cmdarg_err_cont("\"dd\" for delta displayed, \"e\" for epoch, \"r\" for relative, \"u\" for UTC, ");
1413 cmdarg_err_cont("or \"ud\" for UTC with date.");
1417 case 'T': /* printing Type */
1418 if (strcmp(optarg, "text") == 0) {
1419 output_action = WRITE_TEXT;
1420 print_format = PR_FMT_TEXT;
1421 } else if (strcmp(optarg, "ps") == 0) {
1422 output_action = WRITE_TEXT;
1423 print_format = PR_FMT_PS;
1424 } else if (strcmp(optarg, "pdml") == 0) {
1425 output_action = WRITE_XML;
1426 print_details = TRUE; /* Need details */
1427 print_summary = FALSE; /* Don't allow summary */
1428 } else if (strcmp(optarg, "psml") == 0) {
1429 output_action = WRITE_XML;
1430 print_details = FALSE; /* Don't allow details */
1431 print_summary = TRUE; /* Need summary */
1432 } else if (strcmp(optarg, "fields") == 0) {
1433 output_action = WRITE_FIELDS;
1434 print_details = TRUE; /* Need full tree info */
1435 print_summary = FALSE; /* Don't allow summary */
1437 cmdarg_err("Invalid -T parameter.");
1438 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1442 case 'u': /* Seconds type */
1443 if (strcmp(optarg, "s") == 0)
1444 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1445 else if (strcmp(optarg, "hms") == 0)
1446 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1448 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1449 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1453 case 'v': /* Show version and exit */
1455 show_version(comp_info_str, runtime_info_str);
1456 g_string_free(comp_info_str, TRUE);
1457 g_string_free(runtime_info_str, TRUE);
1458 /* We don't really have to cleanup here, but it's a convenient way to test
1459 * start-up and shut-down of the epan library without any UI-specific
1460 * cruft getting in the way. Makes the results of running
1461 * $ ./tools/valgrind-wireshark -n
1462 * much more useful. */
1466 case 'O': /* Only output these protocols */
1467 /* already processed; just ignore it now */
1469 case 'V': /* Verbose */
1470 /* already processed; just ignore it now */
1472 case 'x': /* Print packet data in hex (and ASCII) */
1473 /* already processed; just ignore it now */
1481 /* We won't call the init function for the stat this soon
1482 as it would disallow MATE's fields (which are registered
1483 by the preferences set callback) from being used as
1484 part of a tap filter. Instead, we just add the argument
1485 to a list of stat arguments. */
1486 if (!process_stat_cmd_arg(optarg)) {
1487 if (strcmp("help", optarg)==0) {
1488 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1489 list_stat_cmd_args();
1492 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1493 cmdarg_err_cont(" -z argument must be one of :");
1494 list_stat_cmd_args();
1499 case '?': /* Bad flag - print usage message */
1502 list_capture_types();
1512 /* If we specified output fields, but not the output field type... */
1513 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1514 cmdarg_err("Output fields were specified with \"-e\", "
1515 "but \"-Tfields\" was not specified.");
1517 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1518 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1519 "specified with \"-e\".");
1524 /* If no capture filter or display filter has been specified, and there are
1525 still command-line arguments, treat them as the tokens of a capture
1526 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1527 flag was specified. */
1528 if (optind < argc) {
1529 if (cf_name != NULL) {
1530 if (dfilter != NULL) {
1531 cmdarg_err("Display filters were specified both with \"-d\" "
1532 "and with additional command-line arguments.");
1535 dfilter = get_args_as_string(argc, argv, optind);
1540 if (global_capture_opts.default_options.cfilter) {
1541 cmdarg_err("A default capture filter was specified both with \"-f\""
1542 " and with additional command-line arguments.");
1545 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1546 interface_options interface_opts;
1547 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1548 if (interface_opts.cfilter == NULL) {
1549 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1550 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1551 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1553 cmdarg_err("A capture filter was specified both with \"-f\""
1554 " and with additional command-line arguments.");
1558 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1560 capture_option_specified = TRUE;
1566 if (!global_capture_opts.saving_to_file) {
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;
1572 /* We're saving to a file; if we're writing to the standard output.
1573 and we'll also be writing dissected packets to the standard
1574 output, reject the request. At best, we could redirect that
1575 to the standard error; we *can't* write both to the standard
1576 output and have either of them be useful. */
1577 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1578 cmdarg_err("You can't write both raw packet data and dissected packets"
1579 " to the standard output.");
1584 /* We're not saving the capture to a file; if "-q" wasn't specified,
1585 we should print packet information */
1587 print_packet_info = TRUE;
1590 #ifndef HAVE_LIBPCAP
1591 if (capture_option_specified)
1592 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1599 /* We don't support capture filters when reading from a capture file
1600 (the BPF compiler doesn't support all link-layer types that we
1601 support in capture files we read). */
1603 if (cf_name != NULL) {
1604 if (global_capture_opts.default_options.cfilter) {
1605 cmdarg_err("Only read filters, not capture filters, "
1606 "can be specified when reading a capture file.");
1613 if (output_action != WRITE_TEXT) {
1614 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1619 if (output_only != NULL) {
1622 if (!print_details) {
1623 cmdarg_err("-O requires -V");
1627 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1628 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1629 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1633 if (rfilter != NULL && !perform_two_pass_analysis) {
1634 /* Just a warning, so we don't return */
1635 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1639 if (list_link_layer_types) {
1640 /* We're supposed to list the link-layer types for an interface;
1641 did the user also specify a capture file to be read? */
1643 /* Yes - that's bogus. */
1644 cmdarg_err("You can't specify -L and a capture file to be read.");
1647 /* No - did they specify a ring buffer option? */
1648 if (global_capture_opts.multi_files_on) {
1649 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1655 * "-r" was specified, so we're reading a capture file.
1656 * Capture options don't apply here.
1658 if (global_capture_opts.multi_files_on) {
1659 cmdarg_err("Multiple capture files requested, but "
1660 "a capture isn't being done.");
1663 if (global_capture_opts.has_file_duration) {
1664 cmdarg_err("Switching capture files after a time interval was specified, but "
1665 "a capture isn't being done.");
1668 if (global_capture_opts.has_ring_num_files) {
1669 cmdarg_err("A ring buffer of capture files was specified, but "
1670 "a capture isn't being done.");
1673 if (global_capture_opts.has_autostop_files) {
1674 cmdarg_err("A maximum number of capture files was specified, but "
1675 "a capture isn't being done.");
1679 /* Note: TShark now allows the restriction of a _read_ file by packet count
1680 * and byte count as well as a write file. Other autostop options remain valid
1681 * only for a write file.
1683 if (global_capture_opts.has_autostop_duration) {
1684 cmdarg_err("A maximum capture time was specified, but "
1685 "a capture isn't being done.");
1690 * "-r" wasn't specified, so we're doing a live capture.
1692 if (global_capture_opts.saving_to_file) {
1693 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1695 /* When capturing, we only support writing pcap or pcap-ng format. */
1696 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1697 cmdarg_err("Live captures can only be saved in libpcap format.");
1700 if (global_capture_opts.multi_files_on) {
1701 /* Multiple-file mode doesn't work under certain conditions:
1702 a) it doesn't work if you're writing to the standard output;
1703 b) it doesn't work if you're writing to a pipe;
1705 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1706 cmdarg_err("Multiple capture files requested, but "
1707 "the capture is being written to the standard output.");
1710 if (global_capture_opts.output_to_pipe) {
1711 cmdarg_err("Multiple capture files requested, but "
1712 "the capture file is a pipe.");
1715 if (!global_capture_opts.has_autostop_filesize &&
1716 !global_capture_opts.has_file_duration) {
1717 cmdarg_err("Multiple capture files requested, but "
1718 "no maximum capture file size or duration was specified.");
1722 /* Currently, we don't support read or display filters when capturing
1723 and saving the packets. */
1724 if (rfilter != NULL) {
1725 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1728 if (dfilter != NULL) {
1729 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1733 /* They didn't specify a "-w" flag, so we won't be saving to a
1734 capture file. Check for options that only make sense if
1735 we're saving to a file. */
1736 if (global_capture_opts.has_autostop_filesize) {
1737 cmdarg_err("Maximum capture file size specified, but "
1738 "capture isn't being saved to a file.");
1741 if (global_capture_opts.multi_files_on) {
1742 cmdarg_err("Multiple capture files requested, but "
1743 "the capture isn't being saved to a file.");
1752 /* Start windows sockets */
1753 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1756 /* Notify all registered modules that have had any of their preferences
1757 changed either from one of the preferences file or from the command
1758 line that their preferences have changed. */
1761 /* At this point MATE will have registered its field array so we can
1762 have a tap filter with one of MATE's late-registered fields as part
1763 of the filter. We can now process all the "-z" arguments. */
1764 start_requested_stats();
1767 /* We currently don't support taps, or printing dissected packets,
1768 if we're writing to a pipe. */
1769 if (global_capture_opts.saving_to_file &&
1770 global_capture_opts.output_to_pipe) {
1771 if (tap_listeners_require_dissection()) {
1772 cmdarg_err("Taps aren't supported when saving to a pipe.");
1775 if (print_packet_info) {
1776 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1782 /* disabled protocols as per configuration file */
1783 if (gdp_path == NULL && dp_path == NULL) {
1784 set_disabled_protos_list();
1787 /* Build the column format array */
1788 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1791 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1792 capture_opts_trim_ring_num_files(&global_capture_opts);
1795 if (rfilter != NULL) {
1796 if (!dfilter_compile(rfilter, &rfcode)) {
1797 cmdarg_err("%s", dfilter_error_msg);
1799 #ifdef HAVE_PCAP_OPEN_DEAD
1803 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1805 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1807 " Note: That read filter code looks like a valid capture filter;");
1809 " maybe you mixed them up?");
1818 cfile.rfcode = rfcode;
1820 if (dfilter != NULL) {
1821 if (!dfilter_compile(dfilter, &dfcode)) {
1822 cmdarg_err("%s", dfilter_error_msg);
1824 #ifdef HAVE_PCAP_OPEN_DEAD
1828 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1830 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1832 " Note: That display filter code looks like a valid capture filter;");
1834 " maybe you mixed them up?");
1843 cfile.dfcode = dfcode;
1845 if (print_packet_info) {
1846 /* If we're printing as text or PostScript, we have
1847 to create a print stream. */
1848 if (output_action == WRITE_TEXT) {
1849 switch (print_format) {
1852 print_stream = print_stream_text_stdio_new(stdout);
1856 print_stream = print_stream_ps_stdio_new(stdout);
1860 g_assert_not_reached();
1865 /* We have to dissect each packet if:
1867 we're printing information about each packet;
1869 we're using a read filter on the packets;
1871 we're using a display filter on the packets;
1873 we're using any taps that need dissection. */
1874 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1878 * We're reading a capture file.
1882 * Immediately relinquish any special privileges we have; we must not
1883 * be allowed to read any capture files the user running TShark
1886 relinquish_special_privs_perm();
1887 print_current_user();
1889 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1894 /* Set timestamp precision; there should arguably be a command-line
1895 option to let the user set this. */
1896 switch(wtap_file_tsprecision(cfile.wth)) {
1897 case(WTAP_FILE_TSPREC_SEC):
1898 timestamp_set_precision(TS_PREC_AUTO_SEC);
1900 case(WTAP_FILE_TSPREC_DSEC):
1901 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1903 case(WTAP_FILE_TSPREC_CSEC):
1904 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1906 case(WTAP_FILE_TSPREC_MSEC):
1907 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1909 case(WTAP_FILE_TSPREC_USEC):
1910 timestamp_set_precision(TS_PREC_AUTO_USEC);
1912 case(WTAP_FILE_TSPREC_NSEC):
1913 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1916 g_assert_not_reached();
1919 /* Process the packets in the file */
1922 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1923 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1924 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1926 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1929 CATCH(OutOfMemoryError) {
1933 "Sorry, but TShark has to terminate now!\n"
1935 "Some infos / workarounds can be found at:\n"
1936 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1941 /* We still dump out the results of taps, etc., as we might have
1942 read some packets; however, we exit with an error status. */
1946 /* No capture file specified, so we're supposed to do a live capture
1947 or get a list of link-layer types for a live capture device;
1948 do we have support for live captures? */
1950 /* if no interface was specified, pick a default */
1951 exit_status = capture_opts_default_iface_if_necessary(&global_capture_opts,
1952 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1953 if (exit_status != 0)
1956 /* if requested, list the link layer types and exit */
1957 if (list_link_layer_types) {
1960 /* Get the list of link-layer types for the capture devices. */
1961 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1962 interface_options interface_opts;
1963 if_capabilities_t *caps;
1965 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1966 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str, NULL);
1968 cmdarg_err("%s", err_str);
1972 if (caps->data_link_types == NULL) {
1973 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1976 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1977 free_if_capabilities(caps);
1982 if (print_packet_info) {
1983 if (!write_preamble(NULL)) {
1984 show_print_file_io_error(errno);
1987 } else if (!quiet) {
1989 * We're not printing information for each packet, and the user
1990 * didn't ask us not to print a count of packets as they arrive,
1991 * so print that count so the user knows that packets are arriving.
1993 * XXX - what if the user wants to do a live capture, doesn't want
1994 * to save it to a file, doesn't want information printed for each
1995 * packet, does want some "-z" statistic, and wants packet counts
1996 * so they know whether they're seeing any packets?
1998 print_packet_counts = TRUE;
2001 /* For now, assume libpcap gives microsecond precision. */
2002 timestamp_set_precision(TS_PREC_AUTO_USEC);
2005 * XXX - this returns FALSE if an error occurred, but it also
2006 * returns FALSE if the capture stops because a time limit
2007 * was reached (and possibly other limits), so we can't assume
2008 * it means an error.
2010 * The capture code is a bit twisty, so it doesn't appear to
2011 * be an easy fix. We just ignore the return value for now.
2012 * Instead, pass on the exit status from the capture child.
2015 exit_status = global_capture_session.fork_child_status;
2017 if (print_packet_info) {
2018 if (!write_finale()) {
2020 show_print_file_io_error(err);
2024 /* No - complain. */
2025 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2032 if (cfile.frames != NULL) {
2033 free_frame_data_sequence(cfile.frames);
2034 cfile.frames = NULL;
2037 draw_tap_listeners(TRUE);
2038 funnel_dump_all_text_windows();
2041 output_fields_free(output_fields);
2042 output_fields = NULL;
2047 /*#define USE_BROKEN_G_MAIN_LOOP*/
2049 #ifdef USE_BROKEN_G_MAIN_LOOP
2052 gboolean loop_running = FALSE;
2054 guint32 packet_count = 0;
2057 /* XXX - move to the right position / file */
2058 /* read from a pipe (callback) */
2059 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2061 typedef struct pipe_input_tag {
2065 pipe_input_cb_t input_cb;
2066 guint pipe_input_id;
2068 GMutex *callback_running;
2072 static pipe_input_t pipe_input;
2075 /* The timer has expired, see if there's stuff to read from the pipe,
2076 if so, do the callback */
2078 pipe_timer_cb(gpointer data)
2084 pipe_input_t *pipe_input_p = data;
2085 gint iterations = 0;
2087 g_mutex_lock (pipe_input_p->callback_running);
2089 /* try to read data from the pipe only 5 times, to avoid blocking */
2090 while(iterations < 5) {
2091 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2093 /* Oddly enough although Named pipes don't work on win9x,
2094 PeekNamedPipe does !!! */
2095 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2096 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2098 /* Get the child process exit status */
2099 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2102 /* If the Peek returned an error, or there are bytes to be read
2103 or the childwatcher thread has terminated then call the normal
2105 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2107 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2109 /* And call the real handler */
2110 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2111 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2112 /* pipe closed, return false so that the timer is stopped */
2113 g_mutex_unlock (pipe_input_p->callback_running);
2118 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2119 /* No data, stop now */
2126 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2128 g_mutex_unlock (pipe_input_p->callback_running);
2130 /* we didn't stopped the timer, so let it run */
2137 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2140 pipe_input.source = source;
2141 pipe_input.child_process = child_process;
2142 pipe_input.user_data = user_data;
2143 pipe_input.input_cb = input_cb;
2146 #if GLIB_CHECK_VERSION(2,31,0)
2147 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2148 g_mutex_init(pipe_input.callback_running);
2150 pipe_input.callback_running = g_mutex_new();
2152 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2153 do this but that doesn't cover all win32 platforms. GTK can do
2154 this but doesn't seem to work over processes. Attempt to do
2155 something similar here, start a timer and check for data on every
2157 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2158 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2163 tshark_get_frame_ts(void *data, guint32 frame_num)
2165 capture_file *cf = (capture_file *) data;
2167 if (ref && ref->num == frame_num)
2168 return &ref->abs_ts;
2170 if (prev_dis && prev_dis->num == frame_num)
2171 return &prev_dis->abs_ts;
2173 if (prev_cap && prev_cap->num == frame_num)
2174 return &prev_cap->abs_ts;
2177 frame_data *fd = frame_data_sequence_find(cf->frames, frame_num);
2179 return (fd) ? &fd->abs_ts : NULL;
2186 tshark_epan_new(capture_file *cf)
2188 epan_t *epan = epan_new();
2191 epan->get_frame_ts = tshark_get_frame_ts;
2192 epan->get_interface_name = cap_file_get_interface_name;
2203 GString *str = g_string_new("");
2204 #ifdef USE_TSHARK_SELECT
2208 struct sigaction action, oldaction;
2212 * XXX - dropping privileges is still required, until code cleanup is done
2214 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2215 * when it's done, we don't need special privileges to run tshark at all,
2216 * therefore we don't need to drop these privileges
2217 * The only thing we might want to keep is a warning if tshark is run as root,
2218 * as it's no longer necessary and potentially dangerous.
2220 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2221 * We've opened the capture device, so we shouldn't need any special
2222 * privileges any more; relinquish those privileges.
2224 * XXX - if we have saved set-user-ID support, we should give up those
2225 * privileges immediately, and then reclaim them long enough to get
2226 * a list of network interfaces and to open one, and then give them
2227 * up again, so that stuff we do while processing the argument list,
2228 * reading the user's preferences, loading and starting plugins
2229 * (especially *user* plugins), etc. is done with the user's privileges,
2230 * not special privileges.
2232 relinquish_special_privs_perm();
2233 print_current_user();
2235 /* Create new dissection section. */
2236 epan_free(cfile.epan);
2237 cfile.epan = tshark_epan_new(&cfile);
2240 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2241 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2243 /* Catch SIGINT and SIGTERM and, if we get either of them,
2244 clean up and exit. If SIGHUP isn't being ignored, catch
2245 it too and, if we get it, clean up and exit.
2247 We restart any read that was in progress, so that it doesn't
2248 disrupt reading from the sync pipe. The signal handler tells
2249 the capture child to finish; it will report that it finished,
2250 or will exit abnormally, so we'll stop reading from the sync
2251 pipe, pick up the exit status, and quit. */
2252 memset(&action, 0, sizeof(action));
2253 action.sa_handler = capture_cleanup;
2254 action.sa_flags = SA_RESTART;
2255 sigemptyset(&action.sa_mask);
2256 sigaction(SIGTERM, &action, NULL);
2257 sigaction(SIGINT, &action, NULL);
2258 sigaction(SIGHUP, NULL, &oldaction);
2259 if (oldaction.sa_handler == SIG_DFL)
2260 sigaction(SIGHUP, &action, NULL);
2263 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2264 quiet mode, report the number of packets we've captured.
2266 Again, restart any read that was in progress, so that it doesn't
2267 disrupt reading from the sync pipe. */
2268 action.sa_handler = report_counts_siginfo;
2269 action.sa_flags = SA_RESTART;
2270 sigemptyset(&action.sa_mask);
2271 sigaction(SIGINFO, &action, NULL);
2272 #endif /* SIGINFO */
2275 global_capture_session.state = CAPTURE_PREPARING;
2277 /* Let the user know which interfaces were chosen. */
2278 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2279 interface_options interface_opts;
2281 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2282 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2283 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2284 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2287 if (global_capture_opts.ifaces->len < 2) {
2289 if (global_capture_opts.ifaces->len < 4) {
2291 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2292 interface_options interface_opts;
2294 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2296 if (global_capture_opts.ifaces->len > 2) {
2297 g_string_append_printf(str, ",");
2299 g_string_append_printf(str, " ");
2300 if (i == global_capture_opts.ifaces->len - 1) {
2301 g_string_append_printf(str, "and ");
2304 g_string_append_printf(str, "'%s'", interface_opts.descr);
2307 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2309 if (really_quiet == FALSE)
2310 fprintf(stderr, "Capturing on %s\n", str->str);
2312 g_string_free(str, TRUE);
2314 ret = sync_pipe_start(&global_capture_opts, &global_capture_session, NULL);
2319 /* the actual capture loop
2321 * XXX - glib doesn't seem to provide any event based loop handling.
2323 * XXX - for whatever reason,
2324 * calling g_main_loop_new() ends up in 100% cpu load.
2326 * But that doesn't matter: in UNIX we can use select() to find an input
2327 * source with something to do.
2329 * But that doesn't matter because we're in a CLI (that doesn't need to
2330 * update a GUI or something at the same time) so it's OK if we block
2331 * trying to read from the pipe.
2333 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2334 * wrong (but I leave it there in case I am...).
2337 #ifdef USE_TSHARK_SELECT
2339 FD_SET(pipe_input.source, &readfds);
2342 loop_running = TRUE;
2346 while (loop_running)
2348 #ifdef USE_TSHARK_SELECT
2349 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2355 } else if (ret == 1) {
2357 /* Call the real handler */
2358 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2359 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2362 #ifdef USE_TSHARK_SELECT
2367 CATCH(OutOfMemoryError) {
2371 "Sorry, but TShark has to terminate now!\n"
2373 "Some infos / workarounds can be found at:\n"
2374 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2381 /* capture child detected an error */
2383 capture_input_error_message(capture_session *cap_session _U_, char *error_msg, char *secondary_error_msg)
2385 cmdarg_err("%s", error_msg);
2386 cmdarg_err_cont("%s", secondary_error_msg);
2390 /* capture child detected an capture filter related error */
2392 capture_input_cfilter_error_message(capture_session *cap_session, guint i, char *error_message)
2394 capture_options *capture_opts = cap_session->capture_opts;
2395 dfilter_t *rfcode = NULL;
2396 interface_options interface_opts;
2398 g_assert(i < capture_opts->ifaces->len);
2399 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2401 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2403 "Invalid capture filter \"%s\" for interface %s!\n"
2405 "That string looks like a valid display filter; however, it isn't a valid\n"
2406 "capture filter (%s).\n"
2408 "Note that display filters and capture filters don't have the same syntax,\n"
2409 "so you can't use most display filter expressions as capture filters.\n"
2411 "See the User's Guide for a description of the capture filter syntax.",
2412 interface_opts.cfilter, interface_opts.descr, error_message);
2413 dfilter_free(rfcode);
2416 "Invalid capture filter \"%s\" for interface %s!\n"
2418 "That string isn't a valid capture filter (%s).\n"
2419 "See the User's Guide for a description of the capture filter syntax.",
2420 interface_opts.cfilter, interface_opts.descr, error_message);
2425 /* capture child tells us we have a new (or the first) capture file */
2427 capture_input_new_file(capture_session *cap_session, gchar *new_file)
2429 capture_options *capture_opts = cap_session->capture_opts;
2430 gboolean is_tempfile;
2433 if (cap_session->state == CAPTURE_PREPARING) {
2434 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2436 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2438 g_assert(cap_session->state == CAPTURE_PREPARING || cap_session->state == CAPTURE_RUNNING);
2440 /* free the old filename */
2441 if (capture_opts->save_file != NULL) {
2443 /* we start a new capture file, close the old one (if we had one before) */
2444 if ( ((capture_file *) cap_session->cf)->state != FILE_CLOSED) {
2445 if ( ((capture_file *) cap_session->cf)->wth != NULL) {
2446 wtap_close(((capture_file *) cap_session->cf)->wth);
2448 ((capture_file *) cap_session->cf)->state = FILE_CLOSED;
2451 g_free(capture_opts->save_file);
2452 is_tempfile = FALSE;
2454 /* we didn't had a save_file before, must be a tempfile */
2458 /* save the new filename */
2459 capture_opts->save_file = g_strdup(new_file);
2461 /* if we are in real-time mode, open the new file now */
2462 if (do_dissection) {
2463 /* Attempt to open the capture file and set up to read from it. */
2464 switch(cf_open((capture_file *)cap_session->cf, capture_opts->save_file, is_tempfile, &err)) {
2468 /* Don't unlink (delete) the save file - leave it around,
2469 for debugging purposes. */
2470 g_free(capture_opts->save_file);
2471 capture_opts->save_file = NULL;
2476 cap_session->state = CAPTURE_RUNNING;
2482 /* capture child tells us we have new packets to read */
2484 capture_input_new_packets(capture_session *cap_session, int to_read)
2490 capture_file *cf = (capture_file *)cap_session->cf;
2491 gboolean filtering_tap_listeners;
2496 * Prevent a SIGINFO handler from writing to the standard error while
2497 * we're doing so or writing to the standard output; instead, have it
2498 * just set a flag telling us to print that information when we're done.
2501 #endif /* SIGINFO */
2503 /* Do we have any tap listeners with filters? */
2504 filtering_tap_listeners = have_filtering_tap_listeners();
2506 /* Get the union of the flags for all tap listeners. */
2507 tap_flags = union_of_tap_listener_flags();
2509 if (do_dissection) {
2510 while (to_read-- && cf->wth) {
2511 wtap_cleareof(cf->wth);
2512 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2514 /* read from file failed, tell the capture child to stop */
2515 sync_pipe_stop(cap_session);
2516 wtap_close(cf->wth);
2519 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2520 wtap_buf_ptr(cf->wth),
2521 filtering_tap_listeners, tap_flags);
2524 /* packet successfully read and gone through the "Read Filter" */
2530 * Dumpcap's doing all the work; we're not doing any dissection.
2531 * Count all the packets it wrote.
2533 packet_count += to_read;
2536 if (print_packet_counts) {
2537 /* We're printing packet counts. */
2538 if (packet_count != 0) {
2539 fprintf(stderr, "\r%u ", packet_count);
2540 /* stderr could be line buffered */
2547 * Allow SIGINFO handlers to write.
2552 * If a SIGINFO handler asked us to write out capture counts, do so.
2556 #endif /* SIGINFO */
2562 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2563 /* Report the count only if we aren't printing a packet count
2564 as packets arrive. */
2565 fprintf(stderr, "%u packet%s captured\n", packet_count,
2566 plurality(packet_count, "", "s"));
2569 infoprint = FALSE; /* we just reported it */
2570 #endif /* SIGINFO */
2575 report_counts_siginfo(int signum _U_)
2577 int sav_errno = errno;
2578 /* If we've been told to delay printing, just set a flag asking
2579 that we print counts (if we're supposed to), otherwise print
2580 the count of packets captured (if we're supposed to). */
2587 #endif /* SIGINFO */
2590 /* capture child detected any packet drops? */
2592 capture_input_drops(capture_session *cap_session _U_, guint32 dropped)
2594 if (print_packet_counts) {
2595 /* We're printing packet counts to stderr.
2596 Send a newline so that we move to the line after the packet count. */
2597 fprintf(stderr, "\n");
2601 /* We're printing packet counts to stderr.
2602 Send a newline so that we move to the line after the packet count. */
2603 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2609 * Capture child closed its side of the pipe, report any error and
2610 * do the required cleanup.
2613 capture_input_closed(capture_session *cap_session, gchar *msg)
2615 capture_file *cf = (capture_file *) cap_session->cf;
2618 fprintf(stderr, "tshark: %s\n", msg);
2622 if (cf != NULL && cf->wth != NULL) {
2623 wtap_close(cf->wth);
2624 if (cf->is_tempfile) {
2625 ws_unlink(cf->filename);
2628 #ifdef USE_BROKEN_G_MAIN_LOOP
2629 /*g_main_loop_quit(loop);*/
2632 loop_running = FALSE;
2641 capture_cleanup(DWORD ctrltype _U_)
2643 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2644 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2645 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2646 like SIGTERM at least when the machine's shutting down.
2648 For now, we handle them all as indications that we should clean up
2649 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2652 We must return TRUE so that no other handler - such as one that would
2653 terminate the process - gets called.
2655 XXX - for some reason, typing ^C to TShark, if you run this in
2656 a Cygwin console window in at least some versions of Cygwin,
2657 causes TShark to terminate immediately; this routine gets
2658 called, but the main loop doesn't get a chance to run and
2659 exit cleanly, at least if this is compiled with Microsoft Visual
2660 C++ (i.e., it's a property of the Cygwin console window or Bash;
2661 it happens if TShark is not built with Cygwin - for all I know,
2662 building it with Cygwin may make the problem go away). */
2664 /* tell the capture child to stop */
2665 sync_pipe_stop(&global_capture_session);
2667 /* don't stop our own loop already here, otherwise status messages and
2668 * cleanup wouldn't be done properly. The child will indicate the stop of
2669 * everything by calling capture_input_closed() later */
2675 capture_cleanup(int signum _U_)
2677 /* tell the capture child to stop */
2678 sync_pipe_stop(&global_capture_session);
2680 /* don't stop our own loop already here, otherwise status messages and
2681 * cleanup wouldn't be done properly. The child will indicate the stop of
2682 * everything by calling capture_input_closed() later */
2685 #endif /* HAVE_LIBPCAP */
2688 process_packet_first_pass(capture_file *cf,
2689 gint64 offset, struct wtap_pkthdr *whdr,
2694 gboolean create_proto_tree = FALSE;
2698 /* The frame number of this packet is one more than the count of
2699 frames in this packet. */
2700 framenum = cf->count + 1;
2702 /* If we're not running a display filter and we're not printing any
2703 packet information, we don't need to do a dissection. This means
2704 that all packets can be marked as 'passed'. */
2707 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2709 /* If we're going to print packet information, or we're going to
2710 run a read filter, or display filter, or we're going to process taps, set up to
2711 do a dissection and do so. */
2712 if (do_dissection) {
2713 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2714 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2715 /* Grab any resolved addresses */
2716 host_name_lookup_process();
2718 /* If we're going to be applying a filter, we'll need to
2719 create a protocol tree against which to apply the filter. */
2721 create_proto_tree = TRUE;
2723 /* We're not going to display the protocol tree on this pass,
2724 so it's not going to be "visible". */
2725 epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
2727 /* If we're running a read filter, prime the epan_dissect_t with that
2730 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2732 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2734 if (ref == &fdlocal) {
2735 ref_frame = fdlocal;
2739 epan_dissect_run(&edt, whdr, frame_tvbuff_new(&fdlocal, pd), &fdlocal, NULL);
2741 /* Run the read filter if we have one. */
2743 passed = dfilter_apply_edt(cf->rfcode, &edt);
2747 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2748 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2750 /* If we're not doing dissection then there won't be any dependent frames.
2751 * More importantly, edt.pi.dependent_frames won't be initialized because
2752 * epan hasn't been initialized.
2754 if (do_dissection) {
2755 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2760 /* if we don't add it to the frame_data_sequence, clean it up right now
2762 frame_data_destroy(&fdlocal);
2766 epan_dissect_cleanup(&edt);
2772 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2773 struct wtap_pkthdr *phdr, Buffer *buf,
2774 gboolean filtering_tap_listeners, guint tap_flags)
2776 gboolean create_proto_tree;
2781 /* If we're not running a display filter and we're not printing any
2782 packet information, we don't need to do a dissection. This means
2783 that all packets can be marked as 'passed'. */
2786 /* If we're going to print packet information, or we're going to
2787 run a read filter, or we're going to process taps, set up to
2788 do a dissection and do so. */
2789 if (do_dissection) {
2790 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2791 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2792 /* Grab any resolved addresses */
2793 host_name_lookup_process();
2795 if (cf->dfcode || print_details || filtering_tap_listeners ||
2796 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2797 create_proto_tree = TRUE;
2799 create_proto_tree = FALSE;
2801 /* The protocol tree will be "visible", i.e., printed, only if we're
2802 printing packet details, which is true if we're printing stuff
2803 ("print_packet_info" is true) and we're in verbose mode
2804 ("packet_details" is true). */
2805 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
2807 /* If we're running a display filter, prime the epan_dissect_t with that
2810 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2812 col_custom_prime_edt(&edt, &cf->cinfo);
2814 /* We only need the columns if either
2815 1) some tap needs the columns
2817 2) we're printing packet info but we're *not* verbose; in verbose
2818 mode, we print the protocol tree, not the protocol summary.
2820 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2825 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2832 epan_dissect_run_with_taps(&edt, phdr, frame_tvbuff_new_buffer(fdata, buf), fdata, cinfo);
2834 /* Run the read/display filter if we have one. */
2836 passed = dfilter_apply_edt(cf->dfcode, &edt);
2840 frame_data_set_after_dissect(fdata, &cum_bytes);
2841 /* Process this packet. */
2842 if (print_packet_info) {
2843 /* We're printing packet information; print the information for
2846 print_packet(cf, &edt);
2848 print_packet(cf, NULL);
2850 /* The ANSI C standard does not appear to *require* that a line-buffered
2851 stream be flushed to the host environment whenever a newline is
2852 written, it just says that, on such a stream, characters "are
2853 intended to be transmitted to or from the host environment as a
2854 block when a new-line character is encountered".
2856 The Visual C++ 6.0 C implementation doesn't do what is intended;
2857 even if you set a stream to be line-buffered, it still doesn't
2858 flush the buffer at the end of every line.
2860 So, if the "-l" flag was specified, we flush the standard output
2861 at the end of a packet. This will do the right thing if we're
2862 printing packet summary lines, and, as we print the entire protocol
2863 tree for a single packet without waiting for anything to happen,
2864 it should be as good as line-buffered mode if we're printing
2865 protocol trees. (The whole reason for the "-l" flag in either
2866 tcpdump or TShark is to allow the output of a live capture to
2867 be piped to a program or script and to have that script see the
2868 information for the packet as soon as it's printed, rather than
2869 having to wait until a standard I/O buffer fills up. */
2873 if (ferror(stdout)) {
2874 show_print_file_io_error(errno);
2882 if (do_dissection) {
2883 epan_dissect_cleanup(&edt);
2885 return passed || fdata->flags.dependent_of_displayed;
2889 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2890 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2893 int snapshot_length;
2897 gchar *err_info = NULL;
2899 char *save_file_string = NULL;
2900 gboolean filtering_tap_listeners;
2902 wtapng_section_t *shb_hdr;
2903 wtapng_iface_descriptions_t *idb_inf;
2907 shb_hdr = wtap_file_get_shb_info(cf->wth);
2908 idb_inf = wtap_file_get_idb_info(cf->wth);
2909 #ifdef PCAP_NG_DEFAULT
2910 if (idb_inf->number_of_interfaces > 1) {
2911 linktype = WTAP_ENCAP_PER_PACKET;
2913 linktype = wtap_file_encap(cf->wth);
2916 linktype = wtap_file_encap(cf->wth);
2918 if (save_file != NULL) {
2919 /* Get a string that describes what we're writing to */
2920 save_file_string = output_file_description(save_file);
2922 /* Set up to write to the capture file. */
2923 snapshot_length = wtap_snapshot_length(cf->wth);
2924 if (snapshot_length == 0) {
2925 /* Snapshot length of input file not known. */
2926 snapshot_length = WTAP_MAX_PACKET_SIZE;
2928 /* If we don't have an application name add Tshark */
2929 if (shb_hdr->shb_user_appl == NULL) {
2930 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2931 shb_hdr->shb_user_appl = appname;
2934 if (linktype != WTAP_ENCAP_PER_PACKET && out_file_type == WTAP_FILE_PCAP)
2935 pdh = wtap_dump_open(save_file, out_file_type, linktype,
2936 snapshot_length, FALSE /* compressed */, &err);
2938 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype,
2939 snapshot_length, FALSE /* compressed */, shb_hdr, idb_inf, &err);
2945 /* We couldn't set up to write to the capture file. */
2948 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2949 cmdarg_err("Capture files can't be written in that format.");
2952 case WTAP_ERR_UNSUPPORTED_ENCAP:
2953 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2954 cmdarg_err("The capture file being read can't be written as a "
2955 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2958 case WTAP_ERR_CANT_OPEN:
2959 cmdarg_err("The %s couldn't be created for some "
2960 "unknown reason.", save_file_string);
2963 case WTAP_ERR_SHORT_WRITE:
2964 cmdarg_err("A full header couldn't be written to the %s.",
2969 cmdarg_err("The %s could not be created: %s.", save_file_string,
2970 wtap_strerror(err));
2976 if (print_packet_info) {
2977 if (!write_preamble(cf)) {
2979 show_print_file_io_error(err);
2986 if (pdh && out_file_name_res) {
2987 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2988 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2989 wtap_file_type_short_string(out_file_type));
2993 /* Do we have any tap listeners with filters? */
2994 filtering_tap_listeners = have_filtering_tap_listeners();
2996 /* Get the union of the flags for all tap listeners. */
2997 tap_flags = union_of_tap_listener_flags();
2999 if (perform_two_pass_analysis) {
3001 int old_max_packet_count = max_packet_count;
3003 /* Allocate a frame_data_sequence for all the frames. */
3004 cf->frames = new_frame_data_sequence();
3006 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3007 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
3008 wtap_buf_ptr(cf->wth))) {
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 */
3021 /* Close the sequential I/O side, to free up memory it requires. */
3022 wtap_sequential_close(cf->wth);
3024 /* Allow the protocol dissectors to free up memory that they
3025 * don't need after the sequential run-through of the packets. */
3026 postseq_cleanup_all_protocols();
3028 max_packet_count = old_max_packet_count;
3032 buffer_init(&buf, 1500);
3033 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
3034 fdata = frame_data_sequence_find(cf->frames, framenum);
3035 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
3036 &buf, fdata->cap_len, &err, &err_info)) {
3037 if (process_packet_second_pass(cf, fdata, &cf->phdr, &buf,
3038 filtering_tap_listeners, tap_flags)) {
3039 /* Either there's no read filtering or this packet passed the
3040 filter, so, if we're writing to a capture file, write
3043 if (!wtap_dump(pdh, &cf->phdr, buffer_start_ptr(&cf->buf), &err)) {
3044 /* Error writing to a capture file */
3047 case WTAP_ERR_UNSUPPORTED_ENCAP:
3049 * This is a problem with the particular frame we're writing;
3050 * note that, and give the frame number.
3052 * XXX - framenum is not necessarily the frame number in
3053 * the input file if there was a read filter.
3056 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3057 framenum, cf->filename,
3058 wtap_file_type_short_string(out_file_type));
3062 show_capture_file_io_error(save_file, err, FALSE);
3065 wtap_dump_close(pdh, &err);
3070 /* Stop reading if we have the maximum number of packets;
3071 * When the -c option has not been used, max_packet_count
3072 * starts at 0, which practically means, never stop reading.
3073 * (unless we roll over max_packet_count ?)
3075 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3076 err = 0; /* This is not an error */
3086 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3089 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3090 wtap_buf_ptr(cf->wth),
3091 filtering_tap_listeners, tap_flags)) {
3092 /* Either there's no read filtering or this packet passed the
3093 filter, so, if we're writing to a capture file, write
3096 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3097 /* Error writing to a capture file */
3100 case WTAP_ERR_UNSUPPORTED_ENCAP:
3102 * This is a problem with the particular frame we're writing;
3103 * note that, and give the frame number.
3106 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3107 framenum, cf->filename,
3108 wtap_file_type_short_string(out_file_type));
3112 show_capture_file_io_error(save_file, err, FALSE);
3115 wtap_dump_close(pdh, &err);
3120 /* Stop reading if we have the maximum number of packets;
3121 * When the -c option has not been used, max_packet_count
3122 * starts at 0, which practically means, never stop reading.
3123 * (unless we roll over max_packet_count ?)
3125 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3126 err = 0; /* This is not an error */
3135 * Print a message noting that the read failed somewhere along the line.
3137 * If we're printing packet data, and the standard output and error are
3138 * going to the same place, flush the standard output, so everything
3139 * buffered up is written, and then print a newline to the standard error
3140 * before printing the error message, to separate it from the packet
3141 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3142 * the _fstat() documentation at Microsoft doesn't indicate whether
3143 * st_ino is even supported.)
3146 if (print_packet_info) {
3147 struct stat stat_stdout, stat_stderr;
3149 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3150 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3151 stat_stdout.st_ino == stat_stderr.st_ino) {
3153 fprintf(stderr, "\n");
3160 case WTAP_ERR_UNSUPPORTED:
3161 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3162 cf->filename, err_info);
3166 case WTAP_ERR_UNSUPPORTED_ENCAP:
3167 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3168 cf->filename, err_info);
3172 case WTAP_ERR_CANT_READ:
3173 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3177 case WTAP_ERR_SHORT_READ:
3178 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3182 case WTAP_ERR_BAD_FILE:
3183 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3184 cf->filename, err_info);
3188 case WTAP_ERR_DECOMPRESS:
3189 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3190 "(%s)", cf->filename, err_info);
3194 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3195 cf->filename, wtap_strerror(err));
3198 if (save_file != NULL) {
3199 /* Now close the capture file. */
3200 if (!wtap_dump_close(pdh, &err))
3201 show_capture_file_io_error(save_file, err, TRUE);
3204 if (save_file != NULL) {
3205 /* Now close the capture file. */
3206 if (!wtap_dump_close(pdh, &err))
3207 show_capture_file_io_error(save_file, err, TRUE);
3209 if (print_packet_info) {
3210 if (!write_finale()) {
3212 show_print_file_io_error(err);
3219 wtap_close(cf->wth);
3222 g_free(save_file_string);
3229 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3231 gboolean filtering_tap_listeners, guint tap_flags)
3234 gboolean create_proto_tree;
3239 /* Count this packet. */
3242 /* If we're not running a display filter and we're not printing any
3243 packet information, we don't need to do a dissection. This means
3244 that all packets can be marked as 'passed'. */
3247 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3249 /* If we're going to print packet information, or we're going to
3250 run a read filter, or we're going to process taps, set up to
3251 do a dissection and do so. */
3252 if (do_dissection) {
3253 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3254 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3255 /* Grab any resolved addresses */
3256 host_name_lookup_process();
3258 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3259 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3260 create_proto_tree = TRUE;
3262 create_proto_tree = FALSE;
3264 /* The protocol tree will be "visible", i.e., printed, only if we're
3265 printing packet details, which is true if we're printing stuff
3266 ("print_packet_info" is true) and we're in verbose mode
3267 ("packet_details" is true). */
3268 epan_dissect_init(&edt, cf->epan, create_proto_tree, print_packet_info && print_details);
3270 /* If we're running a filter, prime the epan_dissect_t with that
3273 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3275 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3277 col_custom_prime_edt(&edt, &cf->cinfo);
3279 /* We only need the columns if either
3280 1) some tap needs the columns
3282 2) we're printing packet info but we're *not* verbose; in verbose
3283 mode, we print the protocol tree, not the protocol summary.
3285 3) there is a column mapped as an individual field */
3286 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3291 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3293 if (ref == &fdata) {
3298 epan_dissect_run_with_taps(&edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, cinfo);
3300 /* Run the filters if we have them. */
3302 passed = dfilter_apply_edt(cf->rfcode, &edt);
3303 if (passed && cf->dfcode)
3304 passed = dfilter_apply_edt(cf->dfcode, &edt);
3308 frame_data_set_after_dissect(&fdata, &cum_bytes);
3310 /* Process this packet. */
3311 if (print_packet_info) {
3312 /* We're printing packet information; print the information for
3315 print_packet(cf, &edt);
3317 print_packet(cf, NULL);
3319 /* The ANSI C standard does not appear to *require* that a line-buffered
3320 stream be flushed to the host environment whenever a newline is
3321 written, it just says that, on such a stream, characters "are
3322 intended to be transmitted to or from the host environment as a
3323 block when a new-line character is encountered".
3325 The Visual C++ 6.0 C implementation doesn't do what is intended;
3326 even if you set a stream to be line-buffered, it still doesn't
3327 flush the buffer at the end of every line.
3329 So, if the "-l" flag was specified, we flush the standard output
3330 at the end of a packet. This will do the right thing if we're
3331 printing packet summary lines, and, as we print the entire protocol
3332 tree for a single packet without waiting for anything to happen,
3333 it should be as good as line-buffered mode if we're printing
3334 protocol trees. (The whole reason for the "-l" flag in either
3335 tcpdump or TShark is to allow the output of a live capture to
3336 be piped to a program or script and to have that script see the
3337 information for the packet as soon as it's printed, rather than
3338 having to wait until a standard I/O buffer fills up. */
3342 if (ferror(stdout)) {
3343 show_print_file_io_error(errno);
3348 /* this must be set after print_packet() [bug #8160] */
3349 prev_dis_frame = fdata;
3350 prev_dis = &prev_dis_frame;
3353 prev_cap_frame = fdata;
3354 prev_cap = &prev_cap_frame;
3356 if (do_dissection) {
3357 epan_dissect_cleanup(&edt);
3358 frame_data_destroy(&fdata);
3364 write_preamble(capture_file *cf)
3366 switch (output_action) {
3369 return print_preamble(print_stream, cf ? cf->filename : NULL, wireshark_svnversion);
3373 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3375 write_psml_preamble(stdout);
3376 return !ferror(stdout);
3379 write_fields_preamble(output_fields, stdout);
3380 return !ferror(stdout);
3383 g_assert_not_reached();
3389 get_line_buf(size_t len)
3391 static char *line_bufp = NULL;
3392 static size_t line_buf_len = 256;
3393 size_t new_line_buf_len;
3395 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3396 new_line_buf_len *= 2)
3398 if (line_bufp == NULL) {
3399 line_buf_len = new_line_buf_len;
3400 line_bufp = (char *)g_malloc(line_buf_len + 1);
3402 if (new_line_buf_len > line_buf_len) {
3403 line_buf_len = new_line_buf_len;
3404 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3411 print_columns(capture_file *cf)
3418 line_bufp = get_line_buf(256);
3421 for (i = 0; i < cf->cinfo.num_cols; i++) {
3422 /* Skip columns not marked as visible. */
3423 if (!get_column_visible(i))
3425 switch (cf->cinfo.col_fmt[i]) {
3429 * Don't print this if we're doing a live capture from a network
3430 * interface - if we're doing a live capture, you won't be
3431 * able to look at the capture in the future (it's not being
3432 * saved anywhere), so the frame numbers are unlikely to be
3435 * (XXX - it might be nice to be able to save and print at
3436 * the same time, sort of like an "Update list of packets
3437 * in real time" capture in Wireshark.)
3439 if (global_capture_opts.ifaces->len > 0)
3442 column_len = strlen(cf->cinfo.col_data[i]);
3445 line_bufp = get_line_buf(buf_offset + column_len);
3446 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3452 case COL_ABS_DATE_TIME:
3454 case COL_UTC_DATE_TIME: /* XXX - wider */
3455 column_len = strlen(cf->cinfo.col_data[i]);
3456 if (column_len < 10)
3458 line_bufp = get_line_buf(buf_offset + column_len);
3459 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3465 case COL_DEF_DL_SRC:
3466 case COL_RES_DL_SRC:
3467 case COL_UNRES_DL_SRC:
3468 case COL_DEF_NET_SRC:
3469 case COL_RES_NET_SRC:
3470 case COL_UNRES_NET_SRC:
3471 column_len = strlen(cf->cinfo.col_data[i]);
3472 if (column_len < 12)
3474 line_bufp = get_line_buf(buf_offset + column_len);
3475 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3481 case COL_DEF_DL_DST:
3482 case COL_RES_DL_DST:
3483 case COL_UNRES_DL_DST:
3484 case COL_DEF_NET_DST:
3485 case COL_RES_NET_DST:
3486 case COL_UNRES_NET_DST:
3487 column_len = strlen(cf->cinfo.col_data[i]);
3488 if (column_len < 12)
3490 line_bufp = get_line_buf(buf_offset + column_len);
3491 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3495 column_len = strlen(cf->cinfo.col_data[i]);
3496 line_bufp = get_line_buf(buf_offset + column_len);
3497 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3500 buf_offset += column_len;
3501 if (i != cf->cinfo.num_cols - 1) {
3503 * This isn't the last column, so we need to print a
3504 * separator between this column and the next.
3506 * If we printed a network source and are printing a
3507 * network destination of the same type next, separate
3508 * them with " -> "; if we printed a network destination
3509 * and are printing a network source of the same type
3510 * next, separate them with " <- "; otherwise separate them
3513 * We add enough space to the buffer for " <- " or " -> ",
3514 * even if we're only adding " ".
3516 line_bufp = get_line_buf(buf_offset + 4);
3517 switch (cf->cinfo.col_fmt[i]) {
3522 switch (cf->cinfo.col_fmt[i + 1]) {
3527 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3532 g_strlcat(line_bufp + buf_offset, " ", 5);
3538 case COL_DEF_DL_SRC:
3539 case COL_RES_DL_SRC:
3540 case COL_UNRES_DL_SRC:
3541 switch (cf->cinfo.col_fmt[i + 1]) {
3543 case COL_DEF_DL_DST:
3544 case COL_RES_DL_DST:
3545 case COL_UNRES_DL_DST:
3546 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3551 g_strlcat(line_bufp + buf_offset, " ", 5);
3557 case COL_DEF_NET_SRC:
3558 case COL_RES_NET_SRC:
3559 case COL_UNRES_NET_SRC:
3560 switch (cf->cinfo.col_fmt[i + 1]) {
3562 case COL_DEF_NET_DST:
3563 case COL_RES_NET_DST:
3564 case COL_UNRES_NET_DST:
3565 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3570 g_strlcat(line_bufp + buf_offset, " ", 5);
3579 switch (cf->cinfo.col_fmt[i + 1]) {
3584 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3589 g_strlcat(line_bufp + buf_offset, " ", 5);
3595 case COL_DEF_DL_DST:
3596 case COL_RES_DL_DST:
3597 case COL_UNRES_DL_DST:
3598 switch (cf->cinfo.col_fmt[i + 1]) {
3600 case COL_DEF_DL_SRC:
3601 case COL_RES_DL_SRC:
3602 case COL_UNRES_DL_SRC:
3603 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3608 g_strlcat(line_bufp + buf_offset, " ", 5);
3614 case COL_DEF_NET_DST:
3615 case COL_RES_NET_DST:
3616 case COL_UNRES_NET_DST:
3617 switch (cf->cinfo.col_fmt[i + 1]) {
3619 case COL_DEF_NET_SRC:
3620 case COL_RES_NET_SRC:
3621 case COL_UNRES_NET_SRC:
3622 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3627 g_strlcat(line_bufp + buf_offset, " ", 5);
3634 g_strlcat(line_bufp + buf_offset, " ", 5);
3640 return print_line(print_stream, 0, line_bufp);
3644 print_packet(capture_file *cf, epan_dissect_t *edt)
3646 print_args_t print_args;
3648 if (print_summary || output_fields_has_cols(output_fields)) {
3649 /* Just fill in the columns. */
3650 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3652 if (print_summary) {
3653 /* Now print them. */
3654 switch (output_action) {
3657 if (!print_columns(cf))
3662 proto_tree_write_psml(edt, stdout);
3663 return !ferror(stdout);
3664 case WRITE_FIELDS: /*No non-verbose "fields" format */
3665 g_assert_not_reached();
3670 if (print_details) {
3671 /* Print the information in the protocol tree. */
3672 switch (output_action) {
3675 /* Only initialize the fields that are actually used in proto_tree_print.
3676 * This is particularly important for .range, as that's heap memory which
3677 * we would otherwise have to g_free().
3678 print_args.to_file = TRUE;
3679 print_args.format = print_format;
3680 print_args.print_summary = print_summary;
3681 print_args.print_formfeed = FALSE;
3682 packet_range_init(&print_args.range, &cfile);
3684 print_args.print_hex = print_hex;
3685 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3687 if (!proto_tree_print(&print_args, edt, print_stream))
3690 if (!print_line(print_stream, 0, separator))
3696 proto_tree_write_pdml(edt, stdout);
3698 return !ferror(stdout);
3700 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3702 return !ferror(stdout);
3706 if (print_summary || print_details) {
3707 if (!print_line(print_stream, 0, ""))
3710 if (!print_hex_data(print_stream, edt))
3712 if (!print_line(print_stream, 0, separator))
3721 switch (output_action) {
3724 return print_finale(print_stream);
3728 write_pdml_finale(stdout);
3730 write_psml_finale(stdout);
3731 return !ferror(stdout);
3734 write_fields_finale(output_fields, stdout);
3735 return !ferror(stdout);
3738 g_assert_not_reached();
3744 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3748 char err_msg[2048+1];
3750 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3754 /* The open succeeded. Fill in the information for this file. */
3756 /* Create new epan session for dissection. */
3757 epan_free(cf->epan);
3758 cf->epan = tshark_epan_new(cf);
3761 cf->f_datalen = 0; /* not used, but set it anyway */
3763 /* Set the file name because we need it to set the follow stream filter.
3764 XXX - is that still true? We need it for other reasons, though,
3766 cf->filename = g_strdup(fname);
3768 /* Indicate whether it's a permanent or temporary file. */
3769 cf->is_tempfile = is_tempfile;
3771 /* No user changes yet. */
3772 cf->unsaved_changes = FALSE;
3774 cf->cd_t = wtap_file_type(cf->wth);
3776 cf->drops_known = FALSE;
3778 cf->snap = wtap_snapshot_length(cf->wth);
3779 if (cf->snap == 0) {
3780 /* Snapshot length not known. */
3781 cf->has_snap = FALSE;
3782 cf->snap = WTAP_MAX_PACKET_SIZE;
3784 cf->has_snap = TRUE;
3785 nstime_set_zero(&cf->elapsed_time);
3790 cf->state = FILE_READ_IN_PROGRESS;
3792 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3793 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3798 g_snprintf(err_msg, sizeof err_msg,
3799 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3800 cmdarg_err("%s", err_msg);
3805 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3807 char *save_file_string;
3809 save_file_string = output_file_description(fname);
3814 cmdarg_err("Not all the packets could be written to the %s because there is "
3815 "no space left on the file system.",
3821 cmdarg_err("Not all the packets could be written to the %s because you are "
3822 "too close to, or over your disk quota.",
3827 case WTAP_ERR_CANT_CLOSE:
3828 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3832 case WTAP_ERR_SHORT_WRITE:
3833 cmdarg_err("Not all the packets could be written to the %s.",
3839 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3840 wtap_strerror(err));
3842 cmdarg_err("An error occurred while writing to the %s: %s.",
3843 save_file_string, wtap_strerror(err));
3847 g_free(save_file_string);
3851 show_print_file_io_error(int err)
3856 cmdarg_err("Not all the packets could be printed because there is "
3857 "no space left on the file system.");
3862 cmdarg_err("Not all the packets could be printed because you are "
3863 "too close to, or over your disk quota.");
3868 cmdarg_err("An error occurred while printing packets: %s.",
3875 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3879 static char errmsg_errno[1024+1];
3882 /* Wiretap error. */
3885 case WTAP_ERR_NOT_REGULAR_FILE:
3886 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3889 case WTAP_ERR_RANDOM_OPEN_PIPE:
3890 /* Seen only when opening a capture file for reading. */
3891 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3894 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3895 /* Seen only when opening a capture file for reading. */
3896 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3899 case WTAP_ERR_UNSUPPORTED:
3900 /* Seen only when opening a capture file for reading. */
3901 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3902 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3905 errmsg = errmsg_errno;
3908 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3909 /* Seen only when opening a capture file for writing. */
3910 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3911 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3912 "written to a pipe.", wtap_file_type_short_string(file_type));
3913 errmsg = errmsg_errno;
3916 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3917 /* Seen only when opening a capture file for writing. */
3918 errmsg = "TShark doesn't support writing capture files in that format.";
3921 case WTAP_ERR_UNSUPPORTED_ENCAP:
3923 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3924 "TShark can't save this capture as a \"%s\" file.",
3925 wtap_file_type_short_string(file_type));
3927 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3928 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3932 errmsg = errmsg_errno;
3935 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3937 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3938 "TShark can't save this capture as a \"%s\" file.",
3939 wtap_file_type_short_string(file_type));
3940 errmsg = errmsg_errno;
3942 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3945 case WTAP_ERR_BAD_FILE:
3946 /* Seen only when opening a capture file for reading. */
3947 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3948 "The file \"%%s\" appears to be damaged or corrupt.\n"
3951 errmsg = errmsg_errno;
3954 case WTAP_ERR_CANT_OPEN:
3956 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3958 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3961 case WTAP_ERR_SHORT_READ:
3962 errmsg = "The file \"%s\" appears to have been cut short"
3963 " in the middle of a packet or other data.";
3966 case WTAP_ERR_SHORT_WRITE:
3967 errmsg = "A full header couldn't be written to the file \"%s\".";
3970 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3971 errmsg = "This file type cannot be written as a compressed file.";
3974 case WTAP_ERR_DECOMPRESS:
3975 /* Seen only when opening a capture file for reading. */
3976 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3977 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3980 errmsg = errmsg_errno;
3984 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3985 "The file \"%%s\" could not be %s: %s.",
3986 for_writing ? "created" : "opened",
3987 wtap_strerror(err));
3988 errmsg = errmsg_errno;
3992 errmsg = file_open_error_message(err, for_writing);
3997 * Open/create errors are reported with an console message in TShark.
4000 open_failure_message(const char *filename, int err, gboolean for_writing)
4002 fprintf(stderr, "tshark: ");
4003 fprintf(stderr, file_open_error_message(err, for_writing), filename);
4004 fprintf(stderr, "\n");
4009 * General errors are reported with an console message in TShark.
4012 failure_message(const char *msg_format, va_list ap)
4014 fprintf(stderr, "tshark: ");
4015 vfprintf(stderr, msg_format, ap);
4016 fprintf(stderr, "\n");
4020 * Read errors are reported with an console message in TShark.
4023 read_failure_message(const char *filename, int err)
4025 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
4026 filename, g_strerror(err));
4030 * Write errors are reported with an console message in TShark.
4033 write_failure_message(const char *filename, int err)
4035 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
4036 filename, g_strerror(err));
4040 * Report an error in command-line arguments.
4043 cmdarg_err(const char *fmt, ...)
4048 failure_message(fmt, ap);
4053 * Report additional information for an error in command-line arguments.
4056 cmdarg_err_cont(const char *fmt, ...)
4061 vfprintf(stderr, fmt, ap);
4062 fprintf(stderr, "\n");
4068 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4073 * indent-tabs-mode: nil
4076 * vi: set shiftwidth=2 tabstop=8 expandtab:
4077 * :indentSize=2:tabSize=8:noTabs=true: