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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
55 #include "wsutil/strerror.h"
61 #include "wsutil/wsgetopt.h"
65 #include <epan/epan.h>
66 #include <epan/filesystem.h>
67 #include <wsutil/privileges.h>
68 #include <wsutil/file_util.h>
71 #include <epan/timestamp.h>
72 #include <epan/packet.h>
74 #include "disabled_protos.h"
75 #include <epan/prefs.h>
76 #include <epan/column.h>
78 #include <epan/addr_resolv.h>
80 #include "clopts_common.h"
81 #include "console_io.h"
82 #include "cmdarg_err.h"
83 #include "version_info.h"
84 #include <epan/plugins.h>
86 #include <epan/epan_dissect.h>
88 #include <epan/stat_cmd_args.h>
89 #include <epan/timestamp.h>
90 #include <epan/ex-opt.h>
93 #include "capture_ui_utils.h"
94 #include "capture_ifinfo.h"
95 #include "capture-pcap-util.h"
97 #include "capture-wpcap.h"
98 #include "capture_errs.h"
99 #include <wsutil/unicode-utils.h>
101 #include "capture_sync.h"
102 #endif /* HAVE_LIBPCAP */
104 #include <epan/funnel.h>
107 * This is the template for the decode as option; it is shared between the
108 * various functions that output the usage for this parameter.
110 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
112 static guint32 cum_bytes;
113 static nstime_t first_ts;
114 static nstime_t prev_dis_ts;
115 static nstime_t prev_cap_ts;
117 static gboolean print_packet_info; /* TRUE if we're to print packet information */
119 static gboolean perform_two_pass_analysis;
122 * The way the packet decode is to be written.
125 WRITE_TEXT, /* summary or detail text */
126 WRITE_XML, /* PDML or PSML */
127 WRITE_FIELDS /* User defined list of fields */
128 /* Add CSV and the like here */
131 static output_action_e output_action;
132 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
133 static gboolean verbose;
134 static gboolean print_hex;
135 static gboolean line_buffered;
137 static print_format_e print_format = PR_FMT_TEXT;
138 static print_stream_t *print_stream;
140 static output_fields_t* output_fields = NULL;
144 * TRUE if we're to print packet counts to keep track of captured packets.
146 static gboolean print_packet_counts;
149 static capture_options global_capture_opts;
152 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
153 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
156 static gboolean capture(void);
157 static void report_counts(void);
159 static BOOL WINAPI capture_cleanup(DWORD);
161 static void capture_cleanup(int);
163 static void report_counts_siginfo(int);
166 #endif /* HAVE_LIBPCAP */
168 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
169 static gboolean process_packet(capture_file *cf, gint64 offset,
170 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
171 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
172 static void show_capture_file_io_error(const char *, int, gboolean);
173 static void show_print_file_io_error(int err);
174 static gboolean write_preamble(capture_file *cf);
175 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
176 static gboolean write_finale(void);
177 static const char *cf_open_error_message(int err, gchar *err_info,
178 gboolean for_writing, int file_type);
180 static void open_failure_message(const char *filename, int err,
181 gboolean for_writing);
182 static void failure_message(const char *msg_format, va_list ap);
183 static void read_failure_message(const char *filename, int err);
184 static void write_failure_message(const char *filename, int err);
189 const char *sstr; /* The short string */
190 const char *lstr; /* The long string */
194 string_compare(gconstpointer a, gconstpointer b)
196 return strcmp(((struct string_elem *)a)->sstr,
197 ((struct string_elem *)b)->sstr);
201 string_elem_print(gpointer data, gpointer not_used _U_)
203 fprintf(stderr, " %s - %s\n",
204 ((struct string_elem *)data)->sstr,
205 ((struct string_elem *)data)->lstr);
209 list_capture_types(void) {
211 struct string_elem *captypes;
214 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
216 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
217 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
218 if (wtap_dump_can_open(i)) {
219 captypes[i].sstr = wtap_file_type_short_string(i);
220 captypes[i].lstr = wtap_file_type_string(i);
221 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
224 g_slist_foreach(list, string_elem_print, NULL);
230 print_usage(gboolean print_ver)
237 "TShark " VERSION "%s\n"
238 "Dump and analyze network traffic.\n"
239 "See http://www.wireshark.org for more information.\n"
242 wireshark_svnversion, get_copyright_info());
246 fprintf(output, "\n");
247 fprintf(output, "Usage: tshark [options] ...\n");
248 fprintf(output, "\n");
251 fprintf(output, "Capture interface:\n");
252 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
253 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
254 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
255 fprintf(output, " -p don't capture in promiscuous mode\n");
256 #ifdef HAVE_PCAP_CREATE
257 fprintf(output, " -I capture in monitor mode, if available\n");
259 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
260 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
262 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
263 fprintf(output, " -D print list of interfaces and exit\n");
264 fprintf(output, " -L print list of link-layer types of iface and exit\n");
265 fprintf(output, "\n");
266 fprintf(output, "Capture stop conditions:\n");
267 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
268 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
269 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
270 fprintf(output, " files:NUM - stop after NUM files\n");
271 /*fprintf(output, "\n");*/
272 fprintf(output, "Capture output:\n");
273 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
274 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
275 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
276 #endif /* HAVE_LIBPCAP */
278 /*fprintf(output, "\n");*/
279 fprintf(output, "Input file:\n");
280 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
282 fprintf(output, "\n");
283 fprintf(output, "Processing:\n");
284 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
285 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
286 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
287 fprintf(output, " -d %s ...\n", decode_as_arg_template);
288 fprintf(output, " \"Decode As\", see the man page for details\n");
289 fprintf(output, " Example: tcp.port==8888,http\n");
291 /*fprintf(output, "\n");*/
292 fprintf(output, "Output:\n");
293 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
294 fprintf(output, " (or to the standard output for \"-\")\n");
295 fprintf(output, " -C <config profile> start with specified configuration profile\n");
296 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
297 fprintf(output, " an empty \"-F\" option will list the file types\n");
298 fprintf(output, " -V add output of packet tree (Packet Details)\n");
299 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
300 fprintf(output, " separated\n");
301 fprintf(output, " -S display packets even when writing to a file\n");
302 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
303 fprintf(output, " -T pdml|ps|psml|text|fields\n");
304 fprintf(output, " format of text output (def: text)\n");
305 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
306 fprintf(output, " this option can be repeated to print multiple fields\n");
307 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
308 fprintf(output, " header=y|n switch headers on and off\n");
309 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
310 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
311 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
312 fprintf(output, " aggregator\n");
313 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
314 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
315 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
316 fprintf(output, " -l flush standard output after each packet\n");
317 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
318 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
319 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
321 fprintf(output, "\n");
322 fprintf(output, "Miscellaneous:\n");
323 fprintf(output, " -h display this help and exit\n");
324 fprintf(output, " -v display version info and exit\n");
325 fprintf(output, " -o <name>:<value> ... override preference setting\n");
326 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
327 fprintf(output, " -G [report] dump one of several available reports and exit\n");
328 fprintf(output, " default report=\"fields\"\n");
329 fprintf(output, " use \"-G ?\" for more help\n");
333 glossary_option_help(void)
339 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
341 fprintf(output, "\n");
342 fprintf(output, "Usage: tshark -G [report]\n");
343 fprintf(output, "\n");
344 fprintf(output, "Glossary table reports:\n");
345 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
346 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
347 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
348 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
349 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
350 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
351 fprintf(output, "\n");
352 fprintf(output, "Preference reports:\n");
353 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
354 fprintf(output, " -G currentprefs dump current preferences and exit\n");
355 fprintf(output, "\n");
360 * For a dissector table, print on the stream described by output,
361 * its short name (which is what's used in the "-d" option) and its
365 display_dissector_table_names(const char *table_name, const char *ui_name,
368 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
372 * For a dissector handle, print on the stream described by output,
373 * the filter name (which is what's used in the "-d" option) and the full
374 * name for the protocol that corresponds to this handle.
377 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
380 const gchar* proto_filter_name;
381 const gchar* proto_ui_name;
383 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
385 if (proto_id != -1) {
386 proto_filter_name = proto_get_protocol_filter_name(proto_id);
387 proto_ui_name = proto_get_protocol_name(proto_id);
388 g_assert(proto_filter_name != NULL);
389 g_assert(proto_ui_name != NULL);
391 fprintf((FILE *)output, "\t%s (%s)\n",
398 * The protocol_name_search structure is used by find_protocol_name_func()
399 * to pass parameters and store results
401 struct protocol_name_search{
402 gchar *searched_name; /* Protocol filter name we are looking for */
403 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
404 guint nb_match; /* How many dissectors matched searched_name */
406 typedef struct protocol_name_search *protocol_name_search_t;
409 * This function parses all dissectors associated with a table to find the
410 * one whose protocol has the specified filter name. It is called
411 * as a reference function in a call to dissector_table_foreach_handle.
412 * The name we are looking for, as well as the results, are stored in the
413 * protocol_name_search struct pointed to by user_data.
414 * If called using dissector_table_foreach_handle, we actually parse the
415 * whole list of dissectors.
418 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
422 const gchar *protocol_filter_name;
423 protocol_name_search_t search_info;
427 search_info = (protocol_name_search_t)user_data;
429 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
430 if (proto_id != -1) {
431 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
432 g_assert(protocol_filter_name != NULL);
433 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
435 if (search_info->nb_match == 0) {
436 /* Record this handle only if this is the first match */
437 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
439 search_info->nb_match++;
445 * Print all layer type names supported.
446 * We send the output to the stream described by the handle output.
450 fprint_all_layer_types(FILE *output)
453 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
457 * Print all protocol names supported for a specific layer type.
458 * table_name contains the layer type name in which the search is performed.
459 * We send the output to the stream described by the handle output.
463 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
466 dissector_table_foreach_handle(table_name,
467 display_dissector_names,
472 * The function below parses the command-line parameters for the decode as
473 * feature (a string pointer by cl_param).
474 * It checks the format of the command-line, searches for a matching table
475 * and dissector. If a table/dissector match is not found, we display a
476 * summary of the available tables/dissectors (on stderr) and return FALSE.
477 * If everything is fine, we get the "Decode as" preference activated,
478 * then we return TRUE.
481 add_decode_as(const gchar *cl_param)
485 gchar *decoded_param;
486 gchar *remaining_param;
488 gchar *dissector_str;
489 dissector_handle_t dissector_matching;
490 dissector_table_t table_matching;
491 ftenum_t dissector_table_selector_type;
492 struct protocol_name_search user_protocol_name;
494 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
497 decoded_param = g_strdup(cl_param);
498 g_assert(decoded_param);
501 /* The lines below will parse this string (modifying it) to extract all
502 necessary information. Note that decoded_param is still needed since
503 strings are not copied - we just save pointers. */
505 /* This section extracts a layer type (table_name) from decoded_param */
506 table_name = decoded_param; /* Layer type string starts from beginning */
508 remaining_param = strchr(table_name, '=');
509 if (remaining_param == NULL) {
510 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
511 /* If the argument does not follow the template, carry on anyway to check
512 if the table name is at least correct. If remaining_param is NULL,
513 we'll exit anyway further down */
516 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
519 /* Remove leading and trailing spaces from the table name */
520 while ( table_name[0] == ' ' )
522 while ( table_name[strlen(table_name) - 1] == ' ' )
523 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
525 /* The following part searches a table matching with the layer type specified */
526 table_matching = NULL;
528 /* Look for the requested table */
529 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
530 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
533 table_matching = find_dissector_table(table_name);
534 if (!table_matching) {
535 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
539 if (!table_matching) {
540 /* Display a list of supported layer types to help the user, if the
541 specified layer type was not found */
542 cmdarg_err("Valid layer types are:");
543 fprint_all_layer_types(stderr);
545 if (remaining_param == NULL || !table_matching) {
546 /* Exit if the layer type was not found, or if no '=' separator was found
548 g_free(decoded_param);
552 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
553 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
556 remaining_param++; /* Move to the second '=' */
557 *remaining_param = '\0'; /* Remove the second '=' */
559 remaining_param++; /* Position after the layer type string */
561 /* This section extracts a selector value (selector_str) from decoded_param */
563 selector_str = remaining_param; /* Next part starts with the selector number */
565 remaining_param = strchr(selector_str, ',');
566 if (remaining_param == NULL) {
567 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
568 /* If the argument does not follow the template, carry on anyway to check
569 if the selector value is at least correct. If remaining_param is NULL,
570 we'll exit anyway further down */
573 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
576 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
578 switch (dissector_table_selector_type) {
584 /* The selector for this table is an unsigned number. Parse it as such.
585 There's no need to remove leading and trailing spaces from the
586 selector number string, because sscanf will do that for us. */
587 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
588 cmdarg_err("Invalid selector number \"%s\"", selector_str);
589 g_free(decoded_param);
597 /* The selector for this table is a string. */
601 /* There are currently no dissector tables with any types other
602 than the ones listed above. */
603 g_assert_not_reached();
606 if (remaining_param == NULL) {
607 /* Exit if no ',' separator was found (see above) */
608 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
609 fprint_all_protocols_for_layer_types(stderr, table_name);
610 g_free(decoded_param);
614 remaining_param++; /* Position after the selector number string */
616 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
618 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
620 /* Remove leading and trailing spaces from the dissector name */
621 while ( dissector_str[0] == ' ' )
623 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
624 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
626 dissector_matching = NULL;
628 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
629 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 */
630 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
633 user_protocol_name.nb_match = 0;
634 user_protocol_name.searched_name = dissector_str;
635 user_protocol_name.matched_handle = NULL;
637 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 */
639 if (user_protocol_name.nb_match != 0) {
640 dissector_matching = user_protocol_name.matched_handle;
641 if (user_protocol_name.nb_match > 1) {
642 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
646 /* OK, check whether the problem is that there isn't any such
647 protocol, or that there is but it's not specified as a protocol
648 that's valid for that dissector table.
649 Note, we don't exit here, but dissector_matching will remain NULL,
651 if (proto_get_id_by_filter_name(dissector_str) == -1) {
652 /* No such protocol */
653 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
655 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
656 dissector_str, table_name);
661 if (!dissector_matching) {
662 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
663 fprint_all_protocols_for_layer_types(stderr, table_name);
664 g_free(decoded_param);
668 /* This is the end of the code that parses the command-line options.
669 All information is now stored in the variables:
673 The above variables that are strings are still pointing to areas within
674 decoded_parm. decoded_parm thus still needs to be kept allocated in
675 until we stop needing these variables
676 decoded_param will be deallocated at each exit point of this function */
679 /* We now have a pointer to the handle for the requested dissector
680 (requested protocol) inside the variable dissector_matching */
681 switch (dissector_table_selector_type) {
687 /* The selector for this table is an unsigned number. */
688 dissector_change_uint(table_name, selector, dissector_matching);
694 /* The selector for this table is a string. */
695 dissector_change_string(table_name, selector_str, dissector_matching);
699 /* There are currently no dissector tables with any types other
700 than the ones listed above. */
701 g_assert_not_reached();
703 g_free(decoded_param); /* "Decode As" rule has been successfully added */
708 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
709 const gchar *message, gpointer user_data)
711 /* ignore log message, if log_level isn't interesting based
712 upon the console log preferences.
713 If the preferences haven't been loaded loaded yet, display the
716 The default console_log_level preference value is such that only
717 ERROR, CRITICAL and WARNING level messages are processed;
718 MESSAGE, INFO and DEBUG level messages are ignored.
720 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
721 ERROR and CRITICAL level messages so the current code is a behavioral
722 change. The current behavior is the same as in Wireshark.
724 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
725 prefs.console_log_level != 0) {
729 g_log_default_handler(log_domain, log_level, message, user_data);
734 output_file_description(const char *fname)
736 char *save_file_string;
738 /* Get a string that describes what we're writing to */
739 if (strcmp(fname, "-") == 0) {
740 /* We're writing to the standard output */
741 save_file_string = g_strdup("standard output");
743 /* We're writing to a file with the name in save_file */
744 save_file_string = g_strdup_printf("file \"%s\"", fname);
746 return save_file_string;
750 print_current_user(void) {
751 gchar *cur_user, *cur_group;
752 if (started_with_special_privs()) {
753 cur_user = get_cur_username();
754 cur_group = get_cur_groupname();
755 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
756 cur_user, cur_group);
759 if (running_with_special_privs()) {
760 fprintf(stderr, " This could be dangerous.");
762 fprintf(stderr, "\n");
767 check_capture_privs(void) {
770 /* Warn the user if npf.sys isn't loaded. */
771 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
772 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
773 "capturing or\nlisting interfaces.\n");
779 show_version(GString *comp_info_str, GString *runtime_info_str)
781 printf("TShark " VERSION "%s\n"
788 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
789 runtime_info_str->str);
793 main(int argc, char *argv[])
795 char *init_progfile_dir_error;
797 gboolean arg_error = FALSE;
803 char *gpf_path, *pf_path;
804 char *gdp_path, *dp_path;
805 int gpf_open_errno, gpf_read_errno;
806 int pf_open_errno, pf_read_errno;
807 int gdp_open_errno, gdp_read_errno;
808 int dp_open_errno, dp_read_errno;
812 gboolean list_link_layer_types = FALSE;
813 gboolean start_capture = FALSE;
818 gboolean capture_option_specified = FALSE;
820 gboolean quiet = FALSE;
821 int out_file_type = WTAP_FILE_PCAP;
822 gboolean out_file_name_res = FALSE;
823 gchar *cf_name = NULL, *rfilter = NULL;
824 #ifdef HAVE_PCAP_OPEN_DEAD
825 struct bpf_program fcode;
827 dfilter_t *rfcode = NULL;
830 GLogLevelFlags log_flags;
832 gchar *output_only = NULL;
835 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
836 #define OPTSTRING_B "B:"
838 #define OPTSTRING_B ""
839 #endif /* _WIN32 or HAVE_PCAP_CREATE */
840 #else /* HAVE_LIBPCAP */
841 #define OPTSTRING_B ""
842 #endif /* HAVE_LIBPCAP */
844 #ifdef HAVE_PCAP_CREATE
845 #define OPTSTRING_I "I"
847 #define OPTSTRING_I ""
850 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:St:T:u:vVw:W:xX:y:z:"
852 static const char optstring[] = OPTSTRING;
855 arg_list_utf_16to8(argc, argv);
859 * Get credential information for later use.
861 init_process_policies();
864 * Attempt to get the pathname of the executable file.
866 init_progfile_dir_error = init_progfile_dir(argv[0], main);
867 if (init_progfile_dir_error != NULL) {
868 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
869 init_progfile_dir_error);
873 * In order to have the -X opts assigned before the wslua machine starts
874 * we need to call getopts before epan_init() gets called.
877 optind_initial = optind;
879 while ((opt = getopt(argc, argv, optstring)) != -1) {
881 case 'C': /* Configuration Profile */
882 if (profile_exists (optarg, FALSE)) {
883 set_profile_name (optarg);
885 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
897 optind = optind_initial;
902 /** Send All g_log messages to our own handler **/
906 G_LOG_LEVEL_CRITICAL|
911 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
913 g_log_set_handler(NULL,
915 tshark_log_handler, NULL /* user_data */);
916 g_log_set_handler(LOG_DOMAIN_MAIN,
918 tshark_log_handler, NULL /* user_data */);
921 g_log_set_handler(LOG_DOMAIN_CAPTURE,
923 tshark_log_handler, NULL /* user_data */);
924 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
926 tshark_log_handler, NULL /* user_data */);
929 initialize_funnel_ops();
932 capture_opts_init(&global_capture_opts, &cfile);
935 timestamp_set_type(TS_RELATIVE);
936 timestamp_set_precision(TS_PREC_AUTO);
937 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
939 /* Register all dissectors; we must do this before checking for the
940 "-G" flag, as the "-G" flag dumps information registered by the
941 dissectors, and we must do it before we read the preferences, in
942 case any dissectors register preferences. */
943 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
944 failure_message, open_failure_message, read_failure_message,
945 write_failure_message);
947 /* Register all tap listeners; we do this before we parse the arguments,
948 as the "-z" argument can specify a registered tap. */
950 /* we register the plugin taps before the other taps because
951 stats_tree taps plugins will be registered as tap listeners
952 by stats_tree_stat.c and need to registered before that */
954 register_all_plugin_tap_listeners();
956 register_all_tap_listeners();
958 /* Now register the preferences for any non-dissector modules.
959 We must do that before we read the preferences as well. */
960 prefs_register_modules();
962 /* If invoked with the "-G" flag, we dump out information based on
963 the argument to the "-G" flag; if no argument is specified,
964 for backwards compatibility we dump out a glossary of display
967 XXX - we do this here, for now, to support "-G" with no arguments.
968 If none of our build or other processes uses "-G" with no arguments,
969 we can just process it with the other arguments. */
970 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
971 proto_initialize_all_prefixes();
974 proto_registrar_dump_fields(1);
976 if (strcmp(argv[2], "fields") == 0)
977 proto_registrar_dump_fields(1);
978 else if (strcmp(argv[2], "fields2") == 0)
979 proto_registrar_dump_fields(2);
980 else if (strcmp(argv[2], "fields3") == 0)
981 proto_registrar_dump_fields(3);
982 else if (strcmp(argv[2], "protocols") == 0)
983 proto_registrar_dump_protocols();
984 else if (strcmp(argv[2], "values") == 0)
985 proto_registrar_dump_values();
986 else if (strcmp(argv[2], "decodes") == 0)
987 dissector_dump_decodes();
988 else if (strcmp(argv[2], "defaultprefs") == 0)
990 else if (strcmp(argv[2], "?") == 0)
991 glossary_option_help();
992 else if (strcmp(argv[2], "-?") == 0)
993 glossary_option_help();
994 else if (strcmp(argv[2], "currentprefs") == 0) {
995 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
996 &pf_open_errno, &pf_read_errno, &pf_path);
999 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1006 /* Set the C-language locale to the native environment. */
1007 setlocale(LC_ALL, "");
1009 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1010 &pf_open_errno, &pf_read_errno, &pf_path);
1011 if (gpf_path != NULL) {
1012 if (gpf_open_errno != 0) {
1013 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1014 pf_path, strerror(gpf_open_errno));
1016 if (gpf_read_errno != 0) {
1017 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1018 pf_path, strerror(gpf_read_errno));
1021 if (pf_path != NULL) {
1022 if (pf_open_errno != 0) {
1023 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1024 strerror(pf_open_errno));
1026 if (pf_read_errno != 0) {
1027 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1028 pf_path, strerror(pf_read_errno));
1034 /* Set the name resolution code's flags from the preferences. */
1035 gbl_resolv_flags = prefs_p->name_resolve;
1037 /* Read the disabled protocols file. */
1038 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1039 &dp_path, &dp_open_errno, &dp_read_errno);
1040 if (gdp_path != NULL) {
1041 if (gdp_open_errno != 0) {
1042 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1043 gdp_path, strerror(gdp_open_errno));
1045 if (gdp_read_errno != 0) {
1046 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1047 gdp_path, strerror(gdp_read_errno));
1051 if (dp_path != NULL) {
1052 if (dp_open_errno != 0) {
1054 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1055 strerror(dp_open_errno));
1057 if (dp_read_errno != 0) {
1059 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1060 strerror(dp_read_errno));
1065 check_capture_privs();
1067 cap_file_init(&cfile);
1069 /* Print format defaults to this. */
1070 print_format = PR_FMT_TEXT;
1072 output_fields = output_fields_new();
1074 /* Now get our args */
1075 while ((opt = getopt(argc, argv, optstring)) != -1) {
1077 case 'a': /* autostop criteria */
1078 case 'b': /* Ringbuffer option */
1079 case 'c': /* Capture x packets */
1080 case 'f': /* capture filter */
1081 case 'i': /* Use interface x */
1082 case 'p': /* Don't capture in promiscuous mode */
1083 #ifdef HAVE_PCAP_CREATE
1084 case 'I': /* Capture in monitor mode, if available */
1086 case 's': /* Set the snapshot (capture) length */
1087 case 'w': /* Write to capture file x */
1088 case 'y': /* Set the pcap data link type */
1089 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1090 case 'B': /* Buffer size */
1091 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1093 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1098 capture_option_specified = TRUE;
1103 /* Configuration profile settings were already processed just ignore them this time*/
1105 case 'd': /* Decode as rule */
1106 if (!add_decode_as(optarg))
1109 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1110 case 'K': /* Kerberos keytab file */
1111 read_keytab_file(optarg);
1114 case 'D': /* Print a list of capture devices and exit */
1116 if_list = capture_interface_list(&err, &err_str);
1117 if (if_list == NULL) {
1119 case CANT_GET_INTERFACE_LIST:
1120 cmdarg_err("%s", err_str);
1124 case NO_INTERFACES_FOUND:
1125 cmdarg_err("There are no interfaces on which a capture can be done");
1130 capture_opts_print_interfaces(if_list);
1131 free_interface_list(if_list);
1134 capture_option_specified = TRUE;
1140 output_fields_add(output_fields, optarg);
1144 if(!output_fields_set_option(output_fields, optarg)) {
1145 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1146 output_fields_list_options(stderr);
1151 out_file_type = wtap_short_string_to_file_type(optarg);
1152 if (out_file_type < 0) {
1153 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1154 list_capture_types();
1158 case 'W': /* Select extra information to save in our capture file */
1159 /* This is patterned after the -N flag which may not be the best idea. */
1160 if (strchr(optarg, 'n'))
1161 out_file_name_res = TRUE;
1163 case 'H': /* Read address to name mappings from a hosts file */
1164 if (! read_hosts_file(optarg))
1166 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1169 out_file_name_res = TRUE;
1172 case 'h': /* Print help and exit */
1176 case 'l': /* "Line-buffer" standard output */
1177 /* This isn't line-buffering, strictly speaking, it's just
1178 flushing the standard output after the information for
1179 each packet is printed; however, that should be good
1180 enough for all the purposes to which "-l" is put (and
1181 is probably actually better for "-V", as it does fewer
1184 See the comment in "process_packet()" for an explanation of
1185 why we do that, and why we don't just use "setvbuf()" to
1186 make the standard output line-buffered (short version: in
1187 Windows, "line-buffered" is the same as "fully-buffered",
1188 and the output buffer is only flushed when it fills up). */
1189 line_buffered = TRUE;
1191 case 'L': /* Print list of link-layer types and exit */
1193 list_link_layer_types = TRUE;
1195 capture_option_specified = TRUE;
1199 case 'P': /* Perform two pass analysis */
1200 perform_two_pass_analysis = TRUE;
1202 case 'n': /* No name resolution */
1203 gbl_resolv_flags = RESOLV_NONE;
1205 case 'N': /* Select what types of addresses/port #s to resolve */
1206 if (gbl_resolv_flags == RESOLV_ALL)
1207 gbl_resolv_flags = RESOLV_NONE;
1208 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1209 if (badopt != '\0') {
1210 cmdarg_err("-N specifies unknown resolving option '%c';",
1212 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1216 case 'o': /* Override preference from command line */
1217 switch (prefs_set_pref(optarg)) {
1222 case PREFS_SET_SYNTAX_ERR:
1223 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1227 case PREFS_SET_NO_SUCH_PREF:
1228 case PREFS_SET_OBSOLETE:
1229 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1234 case 'O': /* Only output these protocols */
1235 output_only = g_strdup(optarg);
1237 case 'q': /* Quiet */
1240 case 'r': /* Read capture file x */
1241 cf_name = g_strdup(optarg);
1243 case 'R': /* Read file filter */
1246 case 'S': /* show packets in real time */
1247 print_packet_info = TRUE;
1249 case 't': /* Time stamp type */
1250 if (strcmp(optarg, "r") == 0)
1251 timestamp_set_type(TS_RELATIVE);
1252 else if (strcmp(optarg, "a") == 0)
1253 timestamp_set_type(TS_ABSOLUTE);
1254 else if (strcmp(optarg, "ad") == 0)
1255 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1256 else if (strcmp(optarg, "d") == 0)
1257 timestamp_set_type(TS_DELTA);
1258 else if (strcmp(optarg, "dd") == 0)
1259 timestamp_set_type(TS_DELTA_DIS);
1260 else if (strcmp(optarg, "e") == 0)
1261 timestamp_set_type(TS_EPOCH);
1263 cmdarg_err("Invalid time stamp type \"%s\"",
1265 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1266 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1270 case 'T': /* printing Type */
1271 if (strcmp(optarg, "text") == 0) {
1272 output_action = WRITE_TEXT;
1273 print_format = PR_FMT_TEXT;
1274 } else if (strcmp(optarg, "ps") == 0) {
1275 output_action = WRITE_TEXT;
1276 print_format = PR_FMT_PS;
1277 } else if (strcmp(optarg, "pdml") == 0) {
1278 output_action = WRITE_XML;
1280 } else if (strcmp(optarg, "psml") == 0) {
1281 output_action = WRITE_XML;
1283 } else if(strcmp(optarg, "fields") == 0) {
1284 output_action = WRITE_FIELDS;
1285 verbose = TRUE; /* Need full tree info */
1287 cmdarg_err("Invalid -T parameter.");
1288 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1292 case 'u': /* Seconds type */
1293 if (strcmp(optarg, "s") == 0)
1294 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1295 else if (strcmp(optarg, "hms") == 0)
1296 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1298 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1299 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1303 case 'v': /* Show version and exit */
1305 GString *comp_info_str;
1306 GString *runtime_info_str;
1307 /* Assemble the compile-time version information string */
1308 comp_info_str = g_string_new("Compiled ");
1309 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1311 /* Assemble the run-time version information string */
1312 runtime_info_str = g_string_new("Running ");
1313 get_runtime_version_info(runtime_info_str, NULL);
1314 show_version(comp_info_str, runtime_info_str);
1315 g_string_free(comp_info_str, TRUE);
1316 g_string_free(runtime_info_str, TRUE);
1320 case 'V': /* Verbose */
1322 /* The user asked for a verbose output, so let's ensure they get it,
1323 * even if they're writing to a file.
1325 print_packet_info = TRUE;
1327 case 'x': /* Print packet data in hex (and ASCII) */
1329 /* The user asked for hex output, so let's ensure they get it,
1330 * even if they're writing to a file.
1332 print_packet_info = TRUE;
1337 /* We won't call the init function for the stat this soon
1338 as it would disallow MATE's fields (which are registered
1339 by the preferences set callback) from being used as
1340 part of a tap filter. Instead, we just add the argument
1341 to a list of stat arguments. */
1342 if (!process_stat_cmd_arg(optarg)) {
1343 cmdarg_err("invalid -z argument.");
1344 cmdarg_err_cont(" -z argument must be one of :");
1345 list_stat_cmd_args();
1350 case '?': /* Bad flag - print usage message */
1353 list_capture_types();
1363 /* If we specified output fields, but not the output field type... */
1364 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1365 cmdarg_err("Output fields were specified with \"-e\", "
1366 "but \"-Tfields\" was not specified.");
1368 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1369 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1370 "specified with \"-e\".");
1375 /* If no capture filter or read filter has been specified, and there are
1376 still command-line arguments, treat them as the tokens of a capture
1377 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1378 flag was specified. */
1379 if (optind < argc) {
1380 if (cf_name != NULL) {
1381 if (rfilter != NULL) {
1382 cmdarg_err("Read filters were specified both with \"-R\" "
1383 "and with additional command-line arguments");
1386 rfilter = get_args_as_string(argc, argv, optind);
1389 if (global_capture_opts.has_cfilter) {
1390 cmdarg_err("Capture filters were specified both with \"-f\""
1391 " and with additional command-line arguments");
1394 global_capture_opts.has_cfilter = TRUE;
1395 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1397 capture_option_specified = TRUE;
1403 if (!global_capture_opts.saving_to_file) {
1404 /* We're not saving the capture to a file; if "-q" wasn't specified,
1405 we should print packet information */
1407 print_packet_info = TRUE;
1409 /* We're saving to a file; if we're writing to the standard output.
1410 and we'll also be writing dissected packets to the standard
1411 output, reject the request. At best, we could redirect that
1412 to the standard error; we *can't* write both to the standard
1413 output and have either of them be useful. */
1414 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1415 cmdarg_err("You can't write both raw packet data and dissected packets"
1416 " to the standard output.");
1421 /* We're not saving the capture to a file; if "-q" wasn't specified,
1422 we should print packet information */
1424 print_packet_info = TRUE;
1427 #ifndef HAVE_LIBPCAP
1428 if (capture_option_specified)
1429 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1436 /* We don't support capture filters when reading from a capture file
1437 (the BPF compiler doesn't support all link-layer types that we
1438 support in capture files we read). */
1440 if (cf_name != NULL) {
1441 if (global_capture_opts.has_cfilter) {
1442 cmdarg_err("Only read filters, not capture filters, "
1443 "can be specified when reading a capture file.");
1450 if (output_action != WRITE_TEXT) {
1451 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1456 if (output_only != NULL) {
1460 cmdarg_err("-O requires -V");
1464 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1465 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1466 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1471 if (list_link_layer_types) {
1472 /* We're supposed to list the link-layer types for an interface;
1473 did the user also specify a capture file to be read? */
1475 /* Yes - that's bogus. */
1476 cmdarg_err("You can't specify -L and a capture file to be read.");
1479 /* No - did they specify a ring buffer option? */
1480 if (global_capture_opts.multi_files_on) {
1481 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1487 * "-r" was specified, so we're reading a capture file.
1488 * Capture options don't apply here.
1490 if (global_capture_opts.multi_files_on) {
1491 cmdarg_err("Multiple capture files requested, but "
1492 "a capture isn't being done.");
1495 if (global_capture_opts.has_file_duration) {
1496 cmdarg_err("Switching capture files after a time interval was specified, but "
1497 "a capture isn't being done.");
1500 if (global_capture_opts.has_ring_num_files) {
1501 cmdarg_err("A ring buffer of capture files was specified, but "
1502 "a capture isn't being done.");
1505 if (global_capture_opts.has_autostop_files) {
1506 cmdarg_err("A maximum number of capture files was specified, but "
1507 "a capture isn't being done.");
1511 /* Note: TShark now allows the restriction of a _read_ file by packet count
1512 * and byte count as well as a write file. Other autostop options remain valid
1513 * only for a write file.
1515 if (global_capture_opts.has_autostop_duration) {
1516 cmdarg_err("A maximum capture time was specified, but "
1517 "a capture isn't being done.");
1522 * "-r" wasn't specified, so we're doing a live capture.
1524 if (global_capture_opts.saving_to_file) {
1525 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1527 /* When capturing, we only support writing libpcap format. */
1528 if (out_file_type != WTAP_FILE_PCAP) {
1529 cmdarg_err("Live captures can only be saved in libpcap format.");
1532 if (global_capture_opts.multi_files_on) {
1533 /* Multiple-file mode doesn't work under certain conditions:
1534 a) it doesn't work if you're writing to the standard output;
1535 b) it doesn't work if you're writing to a pipe;
1537 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1538 cmdarg_err("Multiple capture files requested, but "
1539 "the capture is being written to the standard output.");
1542 if (global_capture_opts.output_to_pipe) {
1543 cmdarg_err("Multiple capture files requested, but "
1544 "the capture file is a pipe.");
1547 if (!global_capture_opts.has_autostop_filesize &&
1548 !global_capture_opts.has_file_duration) {
1549 cmdarg_err("Multiple capture files requested, but "
1550 "no maximum capture file size or duration was specified.");
1554 /* Currently, we don't support read filters when capturing
1555 and saving the packets. */
1556 if (rfilter != NULL) {
1557 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1561 /* They didn't specify a "-w" flag, so we won't be saving to a
1562 capture file. Check for options that only make sense if
1563 we're saving to a file. */
1564 if (global_capture_opts.has_autostop_filesize) {
1565 cmdarg_err("Maximum capture file size specified, but "
1566 "capture isn't being saved to a file.");
1569 if (global_capture_opts.multi_files_on) {
1570 cmdarg_err("Multiple capture files requested, but "
1571 "the capture isn't being saved to a file.");
1580 /* Start windows sockets */
1581 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1584 /* Notify all registered modules that have had any of their preferences
1585 changed either from one of the preferences file or from the command
1586 line that their preferences have changed. */
1589 /* At this point MATE will have registered its field array so we can
1590 have a tap filter with one of MATE's late-registered fields as part
1591 of the filter. We can now process all the "-z" arguments. */
1592 start_requested_stats();
1595 /* We currently don't support taps, or printing dissected packets,
1596 if we're writing to a pipe. */
1597 if (global_capture_opts.saving_to_file &&
1598 global_capture_opts.output_to_pipe) {
1599 if (tap_listeners_require_dissection()) {
1600 cmdarg_err("Taps aren't supported when saving to a pipe.");
1603 if (print_packet_info) {
1604 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1610 /* disabled protocols as per configuration file */
1611 if (gdp_path == NULL && dp_path == NULL) {
1612 set_disabled_protos_list();
1615 /* Build the column format array */
1616 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1619 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1620 capture_opts_trim_ring_num_files(&global_capture_opts);
1623 if (rfilter != NULL) {
1624 if (!dfilter_compile(rfilter, &rfcode)) {
1625 cmdarg_err("%s", dfilter_error_msg);
1627 #ifdef HAVE_PCAP_OPEN_DEAD
1631 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1633 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1635 " Note: That display filter code looks like a valid capture filter;");
1637 " maybe you mixed them up?");
1646 cfile.rfcode = rfcode;
1648 if (print_packet_info) {
1649 /* If we're printing as text or PostScript, we have
1650 to create a print stream. */
1651 if (output_action == WRITE_TEXT) {
1652 switch (print_format) {
1655 print_stream = print_stream_text_stdio_new(stdout);
1659 print_stream = print_stream_ps_stdio_new(stdout);
1663 g_assert_not_reached();
1668 /* We have to dissect each packet if:
1670 we're printing information about each packet;
1672 we're using a read filter on the packets;
1674 we're using any taps that need dissection. */
1675 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1679 * We're reading a capture file.
1683 * Immediately relinquish any special privileges we have; we must not
1684 * be allowed to read any capture files the user running TShark
1687 relinquish_special_privs_perm();
1688 print_current_user();
1690 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1695 /* Set timestamp precision; there should arguably be a command-line
1696 option to let the user set this. */
1697 switch(wtap_file_tsprecision(cfile.wth)) {
1698 case(WTAP_FILE_TSPREC_SEC):
1699 timestamp_set_precision(TS_PREC_AUTO_SEC);
1701 case(WTAP_FILE_TSPREC_DSEC):
1702 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1704 case(WTAP_FILE_TSPREC_CSEC):
1705 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1707 case(WTAP_FILE_TSPREC_MSEC):
1708 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1710 case(WTAP_FILE_TSPREC_USEC):
1711 timestamp_set_precision(TS_PREC_AUTO_USEC);
1713 case(WTAP_FILE_TSPREC_NSEC):
1714 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1717 g_assert_not_reached();
1720 /* Process the packets in the file */
1722 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1723 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1724 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1726 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1729 /* We still dump out the results of taps, etc., as we might have
1730 read some packets; however, we exit with an error status. */
1734 /* No capture file specified, so we're supposed to do a live capture
1735 (or get a list of link-layer types for a live capture device);
1736 do we have support for live captures? */
1743 cmdarg_err("WinPcap couldn't be found.");
1744 detailed_err = cant_load_winpcap_err("TShark");
1745 cmdarg_err_cont("%s", detailed_err);
1746 g_free(detailed_err);
1751 /* trim the interface name and exit if that failed */
1752 if (!capture_opts_trim_iface(&global_capture_opts,
1753 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1757 /* if requested, list the link layer types and exit */
1758 if (list_link_layer_types) {
1760 interface_options interface_opts;
1762 /* Get the list of link-layer types for the capture devices. */
1763 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1764 if_capabilities_t *caps;
1766 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1767 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1769 cmdarg_err("%s", err_str);
1773 if (caps->data_link_types == NULL) {
1774 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1777 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1778 free_if_capabilities(caps);
1783 if (print_packet_info) {
1784 if (!write_preamble(NULL)) {
1785 show_print_file_io_error(errno);
1788 } else if (!quiet) {
1790 * We're not printing information for each packet, and the user
1791 * didn't ask us not to print a count of packets as they arrive,
1792 * so print that count so the user knows that packets are arriving.
1794 * XXX - what if the user wants to do a live capture, doesn't want
1795 * to save it to a file, doesn't want information printed for each
1796 * packet, does want some "-z" statistic, and wants packet counts
1797 * so they know whether they're seeing any packets?
1799 print_packet_counts = TRUE;
1802 /* For now, assume libpcap gives microsecond precision. */
1803 timestamp_set_precision(TS_PREC_AUTO_USEC);
1806 * XXX - this returns FALSE if an error occurred, but it also
1807 * returns FALSE if the capture stops because a time limit
1808 * was reached (and possibly other limits), so we can't assume
1809 * it means an error.
1811 * The capture code is a bit twisty, so it doesn't appear to
1812 * be an easy fix. We just ignore the return value for now.
1813 * Instead, pass on the exit status from the capture child.
1816 exit_status = global_capture_opts.fork_child_status;
1818 if (print_packet_info) {
1819 if (!write_finale()) {
1821 show_print_file_io_error(err);
1825 /* No - complain. */
1826 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1833 if (cfile.frames != NULL) {
1834 free_frame_data_sequence(cfile.frames);
1835 cfile.frames = NULL;
1838 draw_tap_listeners(TRUE);
1839 funnel_dump_all_text_windows();
1842 output_fields_free(output_fields);
1843 output_fields = NULL;
1848 /*#define USE_BROKEN_G_MAIN_LOOP*/
1850 #ifdef USE_BROKEN_G_MAIN_LOOP
1853 gboolean loop_running = FALSE;
1855 guint32 packet_count = 0;
1858 /* XXX - move to the right position / file */
1859 /* read from a pipe (callback) */
1860 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1862 typedef struct pipe_input_tag {
1866 pipe_input_cb_t input_cb;
1867 guint pipe_input_id;
1869 GStaticMutex callback_running;
1873 static pipe_input_t pipe_input;
1876 /* The timer has expired, see if there's stuff to read from the pipe,
1877 if so, do the callback */
1879 pipe_timer_cb(gpointer data)
1883 gboolean result, result1;
1885 pipe_input_t *pipe_input_p = data;
1886 gint iterations = 0;
1889 g_static_mutex_lock (&pipe_input_p->callback_running);
1891 /* try to read data from the pipe only 5 times, to avoid blocking */
1892 while(iterations < 5) {
1893 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1895 /* Oddly enough although Named pipes don't work on win9x,
1896 PeekNamedPipe does !!! */
1897 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1898 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1900 /* Get the child process exit status */
1901 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1904 /* If the Peek returned an error, or there are bytes to be read
1905 or the childwatcher thread has terminated then call the normal
1907 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1909 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1911 /* And call the real handler */
1912 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1913 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1914 /* pipe closed, return false so that the timer is stopped */
1915 g_static_mutex_unlock (&pipe_input_p->callback_running);
1920 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1921 /* No data, stop now */
1928 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1930 g_static_mutex_unlock (&pipe_input_p->callback_running);
1932 /* we didn't stopped the timer, so let it run */
1939 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1942 pipe_input.source = source;
1943 pipe_input.child_process = child_process;
1944 pipe_input.user_data = user_data;
1945 pipe_input.input_cb = input_cb;
1948 g_static_mutex_init(&pipe_input.callback_running);
1949 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1950 do this but that doesn't cover all win32 platforms. GTK can do
1951 this but doesn't seem to work over processes. Attempt to do
1952 something similar here, start a timer and check for data on every
1954 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1955 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1966 GString *str = g_string_new("");
1967 #ifdef USE_TSHARK_SELECT
1971 struct sigaction action, oldaction;
1975 * XXX - dropping privileges is still required, until code cleanup is done
1977 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1978 * when it's done, we don't need special privileges to run tshark at all,
1979 * therefore we don't need to drop these privileges
1980 * The only thing we might want to keep is a warning if tshark is run as root,
1981 * as it's no longer necessary and potentially dangerous.
1983 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1984 * We've opened the capture device, so we shouldn't need any special
1985 * privileges any more; relinquish those privileges.
1987 * XXX - if we have saved set-user-ID support, we should give up those
1988 * privileges immediately, and then reclaim them long enough to get
1989 * a list of network interfaces and to open one, and then give them
1990 * up again, so that stuff we do while processing the argument list,
1991 * reading the user's preferences, loading and starting plugins
1992 * (especially *user* plugins), etc. is done with the user's privileges,
1993 * not special privileges.
1995 relinquish_special_privs_perm();
1996 print_current_user();
1998 /* Cleanup all data structures used for dissection. */
1999 cleanup_dissection();
2000 /* Initialize all data structures used for dissection. */
2004 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2005 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2007 /* Catch SIGINT and SIGTERM and, if we get either of them,
2008 clean up and exit. If SIGHUP isn't being ignored, catch
2009 it too and, if we get it, clean up and exit.
2011 We restart any read that was in progress, so that it doesn't
2012 disrupt reading from the sync pipe. The signal handler tells
2013 the capture child to finish; it will report that it finished,
2014 or will exit abnormally, so we'll stop reading from the sync
2015 pipe, pick up the exit status, and quit. */
2016 action.sa_handler = capture_cleanup;
2017 action.sa_flags = SA_RESTART;
2018 sigemptyset(&action.sa_mask);
2019 sigaction(SIGTERM, &action, NULL);
2020 sigaction(SIGINT, &action, NULL);
2021 sigaction(SIGHUP, NULL, &oldaction);
2022 if (oldaction.sa_handler == SIG_DFL)
2023 sigaction(SIGHUP, &action, NULL);
2026 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2027 quiet mode, report the number of packets we've captured.
2029 Again, restart any read that was in progress, so that it doesn't
2030 disrupt reading from the sync pipe. */
2031 action.sa_handler = report_counts_siginfo;
2032 action.sa_flags = SA_RESTART;
2033 sigemptyset(&action.sa_mask);
2034 sigaction(SIGINFO, &action, NULL);
2035 #endif /* SIGINFO */
2038 global_capture_opts.state = CAPTURE_PREPARING;
2040 /* Let the user know which interfaces were chosen. */
2041 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2042 interface_options interface_opts;
2044 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2045 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2046 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2047 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2050 if (global_capture_opts.ifaces->len < 2) {
2052 if (global_capture_opts.ifaces->len < 4) {
2054 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2055 interface_options interface_opts;
2057 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2059 if (global_capture_opts.ifaces->len > 2) {
2060 g_string_append_printf(str, ",");
2062 g_string_append_printf(str, " ");
2063 if (i == global_capture_opts.ifaces->len - 1) {
2064 g_string_append_printf(str, "and ");
2067 g_string_append_printf(str, "%s", interface_opts.descr);
2070 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2072 fprintf(stderr, "Capturing on %s\n", str->str);
2073 g_string_free(str, TRUE);
2075 ret = sync_pipe_start(&global_capture_opts);
2080 /* the actual capture loop
2082 * XXX - glib doesn't seem to provide any event based loop handling.
2084 * XXX - for whatever reason,
2085 * calling g_main_loop_new() ends up in 100% cpu load.
2087 * But that doesn't matter: in UNIX we can use select() to find an input
2088 * source with something to do.
2090 * But that doesn't matter because we're in a CLI (that doesn't need to
2091 * update a GUI or something at the same time) so it's OK if we block
2092 * trying to read from the pipe.
2094 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2095 * wrong (but I leave it there in case I am...).
2098 #ifdef USE_TSHARK_SELECT
2100 FD_SET(pipe_input.source, &readfds);
2103 loop_running = TRUE;
2105 while (loop_running)
2107 #ifdef USE_TSHARK_SELECT
2108 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2114 } else if (ret == 1) {
2116 /* Call the real handler */
2117 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2118 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2121 #ifdef USE_TSHARK_SELECT
2130 /* XXX - move the call to main_window_update() out of capture_sync.c */
2131 /* dummy for capture_sync.c to make linker happy */
2132 void main_window_update(void)
2136 /* capture child detected an error */
2138 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2140 cmdarg_err("%s", error_msg);
2141 cmdarg_err_cont("%s", secondary_error_msg);
2145 /* capture child detected an capture filter related error */
2147 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
2149 dfilter_t *rfcode = NULL;
2152 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
2154 "Invalid capture filter: \"%s\"!\n"
2156 "That string looks like a valid display filter; however, it isn't a valid\n"
2157 "capture filter (%s).\n"
2159 "Note that display filters and capture filters don't have the same syntax,\n"
2160 "so you can't use most display filter expressions as capture filters.\n"
2162 "See the User's Guide for a description of the capture filter syntax.",
2163 capture_opts->cfilter, error_message);
2164 dfilter_free(rfcode);
2167 "Invalid capture filter: \"%s\"!\n"
2169 "That string isn't a valid capture filter (%s).\n"
2170 "See the User's Guide for a description of the capture filter syntax.",
2171 capture_opts->cfilter, error_message);
2176 /* capture child tells us we have a new (or the first) capture file */
2178 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2180 gboolean is_tempfile;
2183 if(capture_opts->state == CAPTURE_PREPARING) {
2184 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2186 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2188 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2190 /* free the old filename */
2191 if (capture_opts->save_file != NULL) {
2193 /* we start a new capture file, close the old one (if we had one before) */
2194 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2195 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2196 wtap_close(((capture_file *) capture_opts->cf)->wth);
2198 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2201 g_free(capture_opts->save_file);
2202 is_tempfile = FALSE;
2204 /* we didn't had a save_file before, must be a tempfile */
2208 /* save the new filename */
2209 capture_opts->save_file = g_strdup(new_file);
2211 /* if we are in real-time mode, open the new file now */
2213 /* Attempt to open the capture file and set up to read from it. */
2214 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2218 /* Don't unlink (delete) the save file - leave it around,
2219 for debugging purposes. */
2220 g_free(capture_opts->save_file);
2221 capture_opts->save_file = NULL;
2226 capture_opts->state = CAPTURE_RUNNING;
2232 /* capture child tells us we have new packets to read */
2234 capture_input_new_packets(capture_options *capture_opts, int to_read)
2240 capture_file *cf = capture_opts->cf;
2241 gboolean filtering_tap_listeners;
2246 * Prevent a SIGINFO handler from writing to the standard error while
2247 * we're doing so or writing to the standard output; instead, have it
2248 * just set a flag telling us to print that information when we're done.
2251 #endif /* SIGINFO */
2253 /* Do we have any tap listeners with filters? */
2254 filtering_tap_listeners = have_filtering_tap_listeners();
2256 /* Get the union of the flags for all tap listeners. */
2257 tap_flags = union_of_tap_listener_flags();
2260 while (to_read-- && cf->wth) {
2261 wtap_cleareof(cf->wth);
2262 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2264 /* read from file failed, tell the capture child to stop */
2265 sync_pipe_stop(capture_opts);
2266 wtap_close(cf->wth);
2269 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2270 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2271 filtering_tap_listeners, tap_flags);
2274 /* packet successfully read and gone through the "Read Filter" */
2280 * Dumpcap's doing all the work; we're not doing any dissection.
2281 * Count all the packets it wrote.
2283 packet_count += to_read;
2286 if (print_packet_counts) {
2287 /* We're printing packet counts. */
2288 if (packet_count != 0) {
2289 fprintf(stderr, "\r%u ", packet_count);
2290 /* stderr could be line buffered */
2297 * Allow SIGINFO handlers to write.
2302 * If a SIGINFO handler asked us to write out capture counts, do so.
2306 #endif /* SIGINFO */
2312 if (!print_packet_counts) {
2313 /* Report the count only if we aren't printing a packet count
2314 as packets arrive. */
2315 fprintf(stderr, "%u packet%s captured\n", packet_count,
2316 plurality(packet_count, "", "s"));
2319 infoprint = FALSE; /* we just reported it */
2320 #endif /* SIGINFO */
2325 report_counts_siginfo(int signum _U_)
2327 int sav_errno = errno;
2328 /* If we've been told to delay printing, just set a flag asking
2329 that we print counts (if we're supposed to), otherwise print
2330 the count of packets captured (if we're supposed to). */
2337 #endif /* SIGINFO */
2340 /* capture child detected any packet drops? */
2342 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2344 if (print_packet_counts) {
2345 /* We're printing packet counts to stderr.
2346 Send a newline so that we move to the line after the packet count. */
2347 fprintf(stderr, "\n");
2351 /* We're printing packet counts to stderr.
2352 Send a newline so that we move to the line after the packet count. */
2353 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2359 * Capture child closed its side of the pipe, report any error and
2360 * do the required cleanup.
2363 capture_input_closed(capture_options *capture_opts, gchar *msg)
2366 fprintf(stderr, "tshark: %s\n", msg);
2370 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2371 wtap_close(((capture_file *) capture_opts->cf)->wth);
2372 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2373 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2376 #ifdef USE_BROKEN_G_MAIN_LOOP
2377 /*g_main_loop_quit(loop);*/
2380 loop_running = FALSE;
2389 capture_cleanup(DWORD ctrltype _U_)
2391 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2392 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2393 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2394 like SIGTERM at least when the machine's shutting down.
2396 For now, we handle them all as indications that we should clean up
2397 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2400 We must return TRUE so that no other handler - such as one that would
2401 terminate the process - gets called.
2403 XXX - for some reason, typing ^C to TShark, if you run this in
2404 a Cygwin console window in at least some versions of Cygwin,
2405 causes TShark to terminate immediately; this routine gets
2406 called, but the main loop doesn't get a chance to run and
2407 exit cleanly, at least if this is compiled with Microsoft Visual
2408 C++ (i.e., it's a property of the Cygwin console window or Bash;
2409 it happens if TShark is not built with Cygwin - for all I know,
2410 building it with Cygwin may make the problem go away). */
2412 /* tell the capture child to stop */
2413 sync_pipe_stop(&global_capture_opts);
2415 /* don't stop our own loop already here, otherwise status messages and
2416 * cleanup wouldn't be done properly. The child will indicate the stop of
2417 * everything by calling capture_input_closed() later */
2423 capture_cleanup(int signum _U_)
2425 /* tell the capture child to stop */
2426 sync_pipe_stop(&global_capture_opts);
2428 /* don't stop our own loop already here, otherwise status messages and
2429 * cleanup wouldn't be done properly. The child will indicate the stop of
2430 * everything by calling capture_input_closed() later */
2433 #endif /* HAVE_LIBPCAP */
2436 process_packet_first_pass(capture_file *cf,
2437 gint64 offset, const struct wtap_pkthdr *whdr,
2438 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2445 /* The frame number of this packet is one more than the count of
2446 frames in this packet. */
2447 framenum = cf->count + 1;
2449 /* If we're not running a display filter and we're not printing any
2450 packet information, we don't need to do a dissection. This means
2451 that all packets can be marked as 'passed'. */
2454 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2456 /* If we're going to print packet information, or we're going to
2457 run a read filter, or we're going to process taps, set up to
2458 do a dissection and do so. */
2459 if (do_dissection) {
2460 if (gbl_resolv_flags)
2461 /* Grab any resolved addresses */
2462 host_name_lookup_process(NULL);
2464 /* The protocol tree will be "visible", i.e., printed, only if we're
2465 printing packet details, which is true if we're printing stuff
2466 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2468 epan_dissect_init(&edt, FALSE, FALSE);
2470 /* If we're running a read filter, prime the epan_dissect_t with that
2473 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2475 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2476 &first_ts, &prev_dis_ts, &prev_cap_ts);
2478 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2480 /* Run the read filter if we have one. */
2482 passed = dfilter_apply_edt(cf->rfcode, &edt);
2486 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2487 frame_data_sequence_add(cf->frames, &fdlocal);
2492 epan_dissect_cleanup(&edt);
2498 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2499 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2500 gboolean filtering_tap_listeners, guint tap_flags)
2502 gboolean create_proto_tree;
2507 /* If we're not running a display filter and we're not printing any
2508 packet information, we don't need to do a dissection. This means
2509 that all packets can be marked as 'passed'. */
2512 /* If we're going to print packet information, or we're going to
2513 run a read filter, or we're going to process taps, set up to
2514 do a dissection and do so. */
2515 if (do_dissection) {
2516 if (gbl_resolv_flags)
2517 /* Grab any resolved addresses */
2518 host_name_lookup_process(NULL);
2520 if (cf->rfcode || verbose || filtering_tap_listeners ||
2521 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2522 create_proto_tree = TRUE;
2524 create_proto_tree = FALSE;
2526 /* The protocol tree will be "visible", i.e., printed, only if we're
2527 printing packet details, which is true if we're printing stuff
2528 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2530 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2532 /* If we're running a read filter, prime the epan_dissect_t with that
2535 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2537 col_custom_prime_edt(&edt, &cf->cinfo);
2539 tap_queue_init(&edt);
2541 /* We only need the columns if either
2543 1) some tap needs the columns
2547 2) we're printing packet info but we're *not* verbose; in verbose
2548 mode, we print the protocol tree, not the protocol summary. */
2549 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2554 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2556 tap_push_tapped_queue(&edt);
2558 /* Run the read filter if we have one. */
2560 passed = dfilter_apply_edt(cf->rfcode, &edt);
2564 /* Process this packet. */
2565 if (print_packet_info) {
2566 /* We're printing packet information; print the information for
2569 print_packet(cf, &edt);
2571 print_packet(cf, NULL);
2573 /* The ANSI C standard does not appear to *require* that a line-buffered
2574 stream be flushed to the host environment whenever a newline is
2575 written, it just says that, on such a stream, characters "are
2576 intended to be transmitted to or from the host environment as a
2577 block when a new-line character is encountered".
2579 The Visual C++ 6.0 C implementation doesn't do what is intended;
2580 even if you set a stream to be line-buffered, it still doesn't
2581 flush the buffer at the end of every line.
2583 So, if the "-l" flag was specified, we flush the standard output
2584 at the end of a packet. This will do the right thing if we're
2585 printing packet summary lines, and, as we print the entire protocol
2586 tree for a single packet without waiting for anything to happen,
2587 it should be as good as line-buffered mode if we're printing
2588 protocol trees. (The whole reason for the "-l" flag in either
2589 tcpdump or TShark is to allow the output of a live capture to
2590 be piped to a program or script and to have that script see the
2591 information for the packet as soon as it's printed, rather than
2592 having to wait until a standard I/O buffer fills up. */
2596 if (ferror(stdout)) {
2597 show_print_file_io_error(errno);
2603 if (do_dissection) {
2604 epan_dissect_cleanup(&edt);
2610 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2611 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2614 int snapshot_length;
2617 gchar *err_info = NULL;
2619 char *save_file_string = NULL;
2620 gboolean filtering_tap_listeners;
2623 linktype = wtap_file_encap(cf->wth);
2624 if (save_file != NULL) {
2625 /* Get a string that describes what we're writing to */
2626 save_file_string = output_file_description(save_file);
2628 /* Set up to write to the capture file. */
2629 snapshot_length = wtap_snapshot_length(cf->wth);
2630 if (snapshot_length == 0) {
2631 /* Snapshot length of input file not known. */
2632 snapshot_length = WTAP_MAX_PACKET_SIZE;
2634 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2635 FALSE /* compressed */, &err);
2638 /* We couldn't set up to write to the capture file. */
2641 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2642 cmdarg_err("Capture files can't be written in that format.");
2645 case WTAP_ERR_UNSUPPORTED_ENCAP:
2646 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2647 cmdarg_err("The capture file being read can't be written in "
2651 case WTAP_ERR_CANT_OPEN:
2652 cmdarg_err("The %s couldn't be created for some "
2653 "unknown reason.", save_file_string);
2656 case WTAP_ERR_SHORT_WRITE:
2657 cmdarg_err("A full header couldn't be written to the %s.",
2662 cmdarg_err("The %s could not be created: %s.", save_file_string,
2663 wtap_strerror(err));
2669 if (print_packet_info) {
2670 if (!write_preamble(cf)) {
2672 show_print_file_io_error(err);
2679 if (pdh && out_file_name_res) {
2680 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2681 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2682 wtap_file_type_short_string(out_file_type));
2686 /* Do we have any tap listeners with filters? */
2687 filtering_tap_listeners = have_filtering_tap_listeners();
2689 /* Get the union of the flags for all tap listeners. */
2690 tap_flags = union_of_tap_listener_flags();
2692 if (perform_two_pass_analysis) {
2695 int old_max_packet_count = max_packet_count;
2697 /* Allocate a frame_data_sequence for all the frames. */
2698 cf->frames = new_frame_data_sequence();
2700 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2701 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2702 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2703 /* Stop reading if we have the maximum number of packets;
2704 * When the -c option has not been used, max_packet_count
2705 * starts at 0, which practically means, never stop reading.
2706 * (unless we roll over max_packet_count ?)
2708 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2709 err = 0; /* This is not an error */
2715 /* Close the sequential I/O side, to free up memory it requires. */
2716 wtap_sequential_close(cf->wth);
2718 /* Allow the protocol dissectors to free up memory that they
2719 * don't need after the sequential run-through of the packets. */
2720 postseq_cleanup_all_protocols();
2722 max_packet_count = old_max_packet_count;
2724 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2725 fdata = frame_data_sequence_find(cf->frames, framenum);
2726 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2727 cf->pd, fdata->cap_len, &err, &err_info)) {
2728 if (process_packet_second_pass(cf, fdata,
2729 &cf->pseudo_header, cf->pd,
2730 filtering_tap_listeners, tap_flags)) {
2731 /* Either there's no read filtering or this packet passed the
2732 filter, so, if we're writing to a capture file, write
2735 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2736 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2738 /* Error writing to a capture file */
2739 show_capture_file_io_error(save_file, err, FALSE);
2740 wtap_dump_close(pdh, &err);
2744 /* Stop reading if we have the maximum number of packets;
2745 * When the -c option has not been used, max_packet_count
2746 * starts at 0, which practically means, never stop reading.
2747 * (unless we roll over max_packet_count ?)
2749 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2750 err = 0; /* This is not an error */
2758 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2759 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2760 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2761 filtering_tap_listeners, tap_flags)) {
2762 /* Either there's no read filtering or this packet passed the
2763 filter, so, if we're writing to a capture file, write
2766 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2767 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2769 /* Error writing to a capture file */
2770 show_capture_file_io_error(save_file, err, FALSE);
2771 wtap_dump_close(pdh, &err);
2775 /* Stop reading if we have the maximum number of packets;
2776 * When the -c option has not been used, max_packet_count
2777 * starts at 0, which practically means, never stop reading.
2778 * (unless we roll over max_packet_count ?)
2780 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2781 err = 0; /* This is not an error */
2790 * Print a message noting that the read failed somewhere along the line.
2792 * If we're printing packet data, and the standard output and error are
2793 * going to the same place, flush the standard output, so everything
2794 * buffered up is written, and then print a newline to the standard error
2795 * before printing the error message, to separate it from the packet
2796 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2797 * the _fstat() documentation at Microsoft doesn't indicate whether
2798 * st_ino is even supported.)
2801 if (print_packet_info) {
2802 struct stat stat_stdout, stat_stderr;
2804 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2805 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2806 stat_stdout.st_ino == stat_stderr.st_ino) {
2808 fprintf(stderr, "\n");
2815 case WTAP_ERR_UNSUPPORTED_ENCAP:
2816 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2817 cf->filename, err_info);
2821 case WTAP_ERR_CANT_READ:
2822 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2826 case WTAP_ERR_SHORT_READ:
2827 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2831 case WTAP_ERR_BAD_RECORD:
2832 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2833 cf->filename, err_info);
2837 case WTAP_ERR_DECOMPRESS:
2838 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2839 "(%s)", cf->filename, err_info);
2843 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2844 cf->filename, wtap_strerror(err));
2847 if (save_file != NULL) {
2848 /* Now close the capture file. */
2849 if (!wtap_dump_close(pdh, &err))
2850 show_capture_file_io_error(save_file, err, TRUE);
2853 if (save_file != NULL) {
2854 /* Now close the capture file. */
2855 if (!wtap_dump_close(pdh, &err))
2856 show_capture_file_io_error(save_file, err, TRUE);
2858 if (print_packet_info) {
2859 if (!write_finale()) {
2861 show_print_file_io_error(err);
2868 wtap_close(cf->wth);
2871 g_free(save_file_string);
2877 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2878 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2879 gboolean filtering_tap_listeners, guint tap_flags)
2882 gboolean create_proto_tree;
2887 /* Count this packet. */
2890 /* If we're not running a display filter and we're not printing any
2891 packet information, we don't need to do a dissection. This means
2892 that all packets can be marked as 'passed'. */
2895 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2897 /* If we're going to print packet information, or we're going to
2898 run a read filter, or we're going to process taps, set up to
2899 do a dissection and do so. */
2900 if (do_dissection) {
2901 if (print_packet_info && gbl_resolv_flags)
2902 /* Grab any resolved addresses */
2903 host_name_lookup_process(NULL);
2905 if (cf->rfcode || verbose || filtering_tap_listeners ||
2906 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2907 create_proto_tree = TRUE;
2909 create_proto_tree = FALSE;
2911 /* The protocol tree will be "visible", i.e., printed, only if we're
2912 printing packet details, which is true if we're printing stuff
2913 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2915 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2917 /* If we're running a read filter, prime the epan_dissect_t with that
2920 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2922 col_custom_prime_edt(&edt, &cf->cinfo);
2924 tap_queue_init(&edt);
2926 /* We only need the columns if either
2928 1) some tap needs the columns
2932 2) we're printing packet info but we're *not* verbose; in verbose
2933 mode, we print the protocol tree, not the protocol summary. */
2934 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2939 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2940 &first_ts, &prev_dis_ts, &prev_cap_ts);
2942 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2944 tap_push_tapped_queue(&edt);
2946 /* Run the read filter if we have one. */
2948 passed = dfilter_apply_edt(cf->rfcode, &edt);
2952 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2954 /* Process this packet. */
2955 if (print_packet_info) {
2956 /* We're printing packet information; print the information for
2959 print_packet(cf, &edt);
2961 print_packet(cf, NULL);
2963 /* The ANSI C standard does not appear to *require* that a line-buffered
2964 stream be flushed to the host environment whenever a newline is
2965 written, it just says that, on such a stream, characters "are
2966 intended to be transmitted to or from the host environment as a
2967 block when a new-line character is encountered".
2969 The Visual C++ 6.0 C implementation doesn't do what is intended;
2970 even if you set a stream to be line-buffered, it still doesn't
2971 flush the buffer at the end of every line.
2973 So, if the "-l" flag was specified, we flush the standard output
2974 at the end of a packet. This will do the right thing if we're
2975 printing packet summary lines, and, as we print the entire protocol
2976 tree for a single packet without waiting for anything to happen,
2977 it should be as good as line-buffered mode if we're printing
2978 protocol trees. (The whole reason for the "-l" flag in either
2979 tcpdump or TShark is to allow the output of a live capture to
2980 be piped to a program or script and to have that script see the
2981 information for the packet as soon as it's printed, rather than
2982 having to wait until a standard I/O buffer fills up. */
2986 if (ferror(stdout)) {
2987 show_print_file_io_error(errno);
2993 if (do_dissection) {
2994 epan_dissect_cleanup(&edt);
2995 frame_data_cleanup(&fdata);
3001 write_preamble(capture_file *cf)
3003 switch (output_action) {
3006 return print_preamble(print_stream, cf ? cf->filename : NULL);
3010 write_pdml_preamble(stdout, cf->filename);
3012 write_psml_preamble(stdout);
3013 return !ferror(stdout);
3016 write_fields_preamble(output_fields, stdout);
3017 return !ferror(stdout);
3020 g_assert_not_reached();
3026 get_line_buf(size_t len)
3028 static char *line_bufp = NULL;
3029 static size_t line_buf_len = 256;
3030 size_t new_line_buf_len;
3032 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3033 new_line_buf_len *= 2)
3035 if (line_bufp == NULL) {
3036 line_buf_len = new_line_buf_len;
3037 line_bufp = g_malloc(line_buf_len + 1);
3039 if (new_line_buf_len > line_buf_len) {
3040 line_buf_len = new_line_buf_len;
3041 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3048 print_columns(capture_file *cf)
3055 line_bufp = get_line_buf(256);
3058 for (i = 0; i < cf->cinfo.num_cols; i++) {
3059 /* Skip columns not marked as visible. */
3060 if (!get_column_visible(i))
3062 switch (cf->cinfo.col_fmt[i]) {
3066 * Don't print this if we're doing a live capture from a network
3067 * interface - if we're doing a live capture, you won't be
3068 * able to look at the capture in the future (it's not being
3069 * saved anywhere), so the frame numbers are unlikely to be
3072 * (XXX - it might be nice to be able to save and print at
3073 * the same time, sort of like an "Update list of packets
3074 * in real time" capture in Wireshark.)
3076 if (global_capture_opts.ifaces->len > 0)
3079 column_len = strlen(cf->cinfo.col_data[i]);
3082 line_bufp = get_line_buf(buf_offset + column_len);
3083 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3089 case COL_ABS_DATE_TIME: /* XXX - wider */
3090 column_len = strlen(cf->cinfo.col_data[i]);
3091 if (column_len < 10)
3093 line_bufp = get_line_buf(buf_offset + column_len);
3094 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3100 case COL_DEF_DL_SRC:
3101 case COL_RES_DL_SRC:
3102 case COL_UNRES_DL_SRC:
3103 case COL_DEF_NET_SRC:
3104 case COL_RES_NET_SRC:
3105 case COL_UNRES_NET_SRC:
3106 column_len = strlen(cf->cinfo.col_data[i]);
3107 if (column_len < 12)
3109 line_bufp = get_line_buf(buf_offset + column_len);
3110 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3116 case COL_DEF_DL_DST:
3117 case COL_RES_DL_DST:
3118 case COL_UNRES_DL_DST:
3119 case COL_DEF_NET_DST:
3120 case COL_RES_NET_DST:
3121 case COL_UNRES_NET_DST:
3122 column_len = strlen(cf->cinfo.col_data[i]);
3123 if (column_len < 12)
3125 line_bufp = get_line_buf(buf_offset + column_len);
3126 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3130 column_len = strlen(cf->cinfo.col_data[i]);
3131 line_bufp = get_line_buf(buf_offset + column_len);
3132 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3135 buf_offset += column_len;
3136 if (i != cf->cinfo.num_cols - 1) {
3138 * This isn't the last column, so we need to print a
3139 * separator between this column and the next.
3141 * If we printed a network source and are printing a
3142 * network destination of the same type next, separate
3143 * them with " -> "; if we printed a network destination
3144 * and are printing a network source of the same type
3145 * next, separate them with " <- "; otherwise separate them
3148 * We add enough space to the buffer for " <- " or " -> ",
3149 * even if we're only adding " ".
3151 line_bufp = get_line_buf(buf_offset + 4);
3152 switch (cf->cinfo.col_fmt[i]) {
3157 switch (cf->cinfo.col_fmt[i + 1]) {
3162 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3167 g_strlcat(line_bufp + buf_offset, " ", 5);
3173 case COL_DEF_DL_SRC:
3174 case COL_RES_DL_SRC:
3175 case COL_UNRES_DL_SRC:
3176 switch (cf->cinfo.col_fmt[i + 1]) {
3178 case COL_DEF_DL_DST:
3179 case COL_RES_DL_DST:
3180 case COL_UNRES_DL_DST:
3181 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3186 g_strlcat(line_bufp + buf_offset, " ", 5);
3192 case COL_DEF_NET_SRC:
3193 case COL_RES_NET_SRC:
3194 case COL_UNRES_NET_SRC:
3195 switch (cf->cinfo.col_fmt[i + 1]) {
3197 case COL_DEF_NET_DST:
3198 case COL_RES_NET_DST:
3199 case COL_UNRES_NET_DST:
3200 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3205 g_strlcat(line_bufp + buf_offset, " ", 5);
3214 switch (cf->cinfo.col_fmt[i + 1]) {
3219 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3224 g_strlcat(line_bufp + buf_offset, " ", 5);
3230 case COL_DEF_DL_DST:
3231 case COL_RES_DL_DST:
3232 case COL_UNRES_DL_DST:
3233 switch (cf->cinfo.col_fmt[i + 1]) {
3235 case COL_DEF_DL_SRC:
3236 case COL_RES_DL_SRC:
3237 case COL_UNRES_DL_SRC:
3238 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3243 g_strlcat(line_bufp + buf_offset, " ", 5);
3249 case COL_DEF_NET_DST:
3250 case COL_RES_NET_DST:
3251 case COL_UNRES_NET_DST:
3252 switch (cf->cinfo.col_fmt[i + 1]) {
3254 case COL_DEF_NET_SRC:
3255 case COL_RES_NET_SRC:
3256 case COL_UNRES_NET_SRC:
3257 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3262 g_strlcat(line_bufp + buf_offset, " ", 5);
3269 g_strlcat(line_bufp + buf_offset, " ", 5);
3275 return print_line(print_stream, 0, line_bufp);
3279 print_packet(capture_file *cf, epan_dissect_t *edt)
3281 print_args_t print_args;
3284 /* Print the information in the protocol tree. */
3285 switch (output_action) {
3288 print_args.to_file = TRUE;
3289 print_args.format = print_format;
3290 print_args.print_summary = !verbose;
3291 print_args.print_hex = verbose && print_hex;
3292 print_args.print_formfeed = FALSE;
3293 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3295 /* init the packet range */
3296 packet_range_init(&print_args.range);
3298 if (!proto_tree_print(&print_args, edt, print_stream))
3301 /* "print_hex_data()" will put out a leading blank line, as well
3302 as a trailing one; print one here, to separate the packets,
3303 only if "print_hex_data()" won't be called. */
3304 if (!print_line(print_stream, 0, ""))
3310 proto_tree_write_pdml(edt, stdout);
3312 return !ferror(stdout);
3314 proto_tree_write_fields(output_fields, edt, stdout);
3316 return !ferror(stdout);
3319 /* Just fill in the columns. */
3320 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3322 /* Now print them. */
3323 switch (output_action) {
3326 if (!print_columns(cf))
3331 proto_tree_write_psml(edt, stdout);
3332 return !ferror(stdout);
3333 case WRITE_FIELDS: /*No non-verbose "fields" format */
3334 g_assert_not_reached();
3339 if (!print_hex_data(print_stream, edt))
3341 if (!print_line(print_stream, 0, ""))
3350 switch (output_action) {
3353 return print_finale(print_stream);
3357 write_pdml_finale(stdout);
3359 write_psml_finale(stdout);
3360 return !ferror(stdout);
3363 write_fields_finale(output_fields, stdout);
3364 return !ferror(stdout);
3367 g_assert_not_reached();
3373 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3377 char err_msg[2048+1];
3379 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3383 /* The open succeeded. Fill in the information for this file. */
3385 /* Cleanup all data structures used for dissection. */
3386 cleanup_dissection();
3387 /* Initialize all data structures used for dissection. */
3391 cf->f_datalen = 0; /* not used, but set it anyway */
3393 /* Set the file name because we need it to set the follow stream filter.
3394 XXX - is that still true? We need it for other reasons, though,
3396 cf->filename = g_strdup(fname);
3398 /* Indicate whether it's a permanent or temporary file. */
3399 cf->is_tempfile = is_tempfile;
3401 /* If it's a temporary capture buffer file, mark it as not saved. */
3402 cf->user_saved = !is_tempfile;
3404 cf->cd_t = wtap_file_type(cf->wth);
3406 cf->drops_known = FALSE;
3408 cf->snap = wtap_snapshot_length(cf->wth);
3409 if (cf->snap == 0) {
3410 /* Snapshot length not known. */
3411 cf->has_snap = FALSE;
3412 cf->snap = WTAP_MAX_PACKET_SIZE;
3414 cf->has_snap = TRUE;
3415 nstime_set_zero(&cf->elapsed_time);
3416 nstime_set_unset(&first_ts);
3417 nstime_set_unset(&prev_dis_ts);
3418 nstime_set_unset(&prev_cap_ts);
3420 cf->state = FILE_READ_IN_PROGRESS;
3422 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3423 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3428 g_snprintf(err_msg, sizeof err_msg,
3429 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3430 cmdarg_err("%s", err_msg);
3435 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3437 char *save_file_string;
3439 save_file_string = output_file_description(fname);
3444 cmdarg_err("Not all the packets could be written to the %s because there is "
3445 "no space left on the file system.",
3451 cmdarg_err("Not all the packets could be written to the %s because you are "
3452 "too close to, or over your disk quota.",
3457 case WTAP_ERR_CANT_CLOSE:
3458 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3462 case WTAP_ERR_SHORT_WRITE:
3463 cmdarg_err("Not all the packets could be written to the %s.",
3469 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3470 wtap_strerror(err));
3472 cmdarg_err("An error occurred while writing to the %s: %s.",
3473 save_file_string, wtap_strerror(err));
3477 g_free(save_file_string);
3481 show_print_file_io_error(int err)
3486 cmdarg_err("Not all the packets could be printed because there is "
3487 "no space left on the file system.");
3492 cmdarg_err("Not all the packets could be printed because you are "
3493 "too close to, or over your disk quota.");
3498 cmdarg_err("An error occurred while printing packets: %s.",
3505 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3509 static char errmsg_errno[1024+1];
3512 /* Wiretap error. */
3515 case WTAP_ERR_NOT_REGULAR_FILE:
3516 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3519 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3520 /* Seen only when opening a capture file for reading. */
3521 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3524 case WTAP_ERR_UNSUPPORTED:
3525 /* Seen only when opening a capture file for reading. */
3526 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3527 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3530 errmsg = errmsg_errno;
3533 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3534 /* Seen only when opening a capture file for writing. */
3535 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3536 "The file \"%%s\" is a pipe, and %s capture files can't be "
3537 "written to a pipe.", wtap_file_type_string(file_type));
3538 errmsg = errmsg_errno;
3541 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3542 /* Seen only when opening a capture file for writing. */
3543 errmsg = "TShark doesn't support writing capture files in that format.";
3546 case WTAP_ERR_UNSUPPORTED_ENCAP:
3548 errmsg = "TShark can't save this capture in that format.";
3550 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3551 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3554 errmsg = errmsg_errno;
3558 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3560 errmsg = "TShark can't save this capture in that format.";
3562 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3565 case WTAP_ERR_BAD_RECORD:
3566 /* Seen only when opening a capture file for reading. */
3567 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3568 "The file \"%%s\" appears to be damaged or corrupt.\n"
3571 errmsg = errmsg_errno;
3574 case WTAP_ERR_CANT_OPEN:
3576 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3578 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3581 case WTAP_ERR_SHORT_READ:
3582 errmsg = "The file \"%s\" appears to have been cut short"
3583 " in the middle of a packet or other data.";
3586 case WTAP_ERR_SHORT_WRITE:
3587 errmsg = "A full header couldn't be written to the file \"%s\".";
3590 case WTAP_ERR_DECOMPRESS:
3591 /* Seen only when opening a capture file for reading. */
3592 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3593 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3596 errmsg = errmsg_errno;
3600 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3601 "The file \"%%s\" could not be %s: %s.",
3602 for_writing ? "created" : "opened",
3603 wtap_strerror(err));
3604 errmsg = errmsg_errno;
3608 errmsg = file_open_error_message(err, for_writing);
3613 * Open/create errors are reported with an console message in TShark.
3616 open_failure_message(const char *filename, int err, gboolean for_writing)
3618 fprintf(stderr, "tshark: ");
3619 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3620 fprintf(stderr, "\n");
3625 * General errors are reported with an console message in TShark.
3628 failure_message(const char *msg_format, va_list ap)
3630 fprintf(stderr, "tshark: ");
3631 vfprintf(stderr, msg_format, ap);
3632 fprintf(stderr, "\n");
3636 * Read errors are reported with an console message in TShark.
3639 read_failure_message(const char *filename, int err)
3641 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3642 filename, strerror(err));
3646 * Write errors are reported with an console message in TShark.
3649 write_failure_message(const char *filename, int err)
3651 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3652 filename, strerror(err));
3656 * Print to the standard error. This is a command-line tool, so there's
3657 * no need to pop up a console.
3660 vfprintf_stderr(const char *fmt, va_list ap)
3662 vfprintf(stderr, fmt, ap);
3666 fprintf_stderr(const char *fmt, ...)
3671 vfprintf_stderr(fmt, ap);
3676 * Report an error in command-line arguments.
3679 cmdarg_err(const char *fmt, ...)
3684 failure_message(fmt, ap);
3689 * Report additional information for an error in command-line arguments.
3692 cmdarg_err_cont(const char *fmt, ...)
3697 vfprintf(stderr, fmt, ap);
3698 fprintf(stderr, "\n");