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>
70 #include <epan/timestamp.h>
71 #include <epan/packet.h>
73 #include "disabled_protos.h"
74 #include <epan/prefs.h>
75 #include <epan/column.h>
77 #include <epan/addr_resolv.h>
79 #include "clopts_common.h"
80 #include "console_io.h"
81 #include "cmdarg_err.h"
82 #include "version_info.h"
83 #include <epan/plugins.h>
85 #include <epan/epan_dissect.h>
87 #include <epan/stat_cmd_args.h>
88 #include <epan/timestamp.h>
89 #include <epan/ex-opt.h>
92 #include "capture_ui_utils.h"
93 #include "capture_ifinfo.h"
94 #include "capture-pcap-util.h"
96 #include "capture-wpcap.h"
97 #include "capture_errs.h"
99 #include "capture_sync.h"
100 #endif /* HAVE_LIBPCAP */
102 #include <epan/funnel.h>
106 * This is the template for the decode as option; it is shared between the
107 * various functions that output the usage for this parameter.
109 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
111 static guint32 cum_bytes;
112 static nstime_t first_ts;
113 static nstime_t prev_dis_ts;
114 static nstime_t prev_cap_ts;
116 static gboolean print_packet_info; /* TRUE if we're to print packet information */
118 static gboolean perform_two_pass_analysis;
121 * The way the packet decode is to be written.
124 WRITE_TEXT, /* summary or detail text */
125 WRITE_XML, /* PDML or PSML */
126 WRITE_FIELDS /* User defined list of fields */
127 /* Add CSV and the like here */
130 static output_action_e output_action;
131 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
132 static gboolean verbose;
133 static gboolean print_hex;
134 static gboolean line_buffered;
136 static print_format_e print_format = PR_FMT_TEXT;
137 static print_stream_t *print_stream;
139 static output_fields_t* output_fields = NULL;
143 * TRUE if we're to print packet counts to keep track of captured packets.
145 static gboolean print_packet_counts;
148 static capture_options global_capture_opts;
151 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
152 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
155 static gboolean capture(void);
156 static void report_counts(void);
158 static BOOL WINAPI capture_cleanup(DWORD);
160 static void capture_cleanup(int);
162 static void report_counts_siginfo(int);
165 #endif /* HAVE_LIBPCAP */
167 static int load_cap_file(capture_file *, char *, int, int, gint64);
168 static gboolean process_packet(capture_file *cf, gint64 offset,
169 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
170 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
171 static void show_capture_file_io_error(const char *, int, gboolean);
172 static void show_print_file_io_error(int err);
173 static gboolean write_preamble(capture_file *cf);
174 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
175 static gboolean write_finale(void);
176 static const char *cf_open_error_message(int err, gchar *err_info,
177 gboolean for_writing, int file_type);
179 static void open_failure_message(const char *filename, int err,
180 gboolean for_writing);
181 static void failure_message(const char *msg_format, va_list ap);
182 static void read_failure_message(const char *filename, int err);
183 static void write_failure_message(const char *filename, int err);
188 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
190 g_assert_not_reached();
193 static void list_capture_types(void) {
196 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
197 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
198 if (wtap_dump_can_open(i))
199 fprintf(stderr, " %s - %s\n",
200 wtap_file_type_short_string(i), wtap_file_type_string(i));
205 print_usage(gboolean print_ver)
212 "TShark " VERSION "%s\n"
213 "Dump and analyze network traffic.\n"
214 "See http://www.wireshark.org for more information.\n"
217 wireshark_svnversion, get_copyright_info());
221 fprintf(output, "\n");
222 fprintf(output, "Usage: tshark [options] ...\n");
223 fprintf(output, "\n");
226 fprintf(output, "Capture interface:\n");
227 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
228 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
229 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
230 fprintf(output, " -p don't capture in promiscuous mode\n");
231 #ifdef HAVE_PCAP_CREATE
232 fprintf(output, " -I capture in monitor mode, if available\n");
234 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
235 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
237 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
238 fprintf(output, " -D print list of interfaces and exit\n");
239 fprintf(output, " -L print list of link-layer types of iface and exit\n");
240 fprintf(output, "\n");
241 fprintf(output, "Capture stop conditions:\n");
242 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
243 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
244 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
245 fprintf(output, " files:NUM - stop after NUM files\n");
246 /*fprintf(output, "\n");*/
247 fprintf(output, "Capture output:\n");
248 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
249 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
250 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
251 #endif /* HAVE_LIBPCAP */
253 /*fprintf(output, "\n");*/
254 fprintf(output, "Input file:\n");
255 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
257 fprintf(output, "\n");
258 fprintf(output, "Processing:\n");
259 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
260 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
261 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
262 fprintf(output, " -d %s ...\n", decode_as_arg_template);
263 fprintf(output, " \"Decode As\", see the man page for details\n");
264 fprintf(output, " Example: tcp.port==8888,http\n");
266 /*fprintf(output, "\n");*/
267 fprintf(output, "Output:\n");
268 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
269 fprintf(output, " (or to the standard output for \"-\")\n");
270 fprintf(output, " -C <config profile> start with specified configuration profile\n");
271 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
272 fprintf(output, " an empty \"-F\" option will list the file types\n");
273 fprintf(output, " -V add output of packet tree (Packet Details)\n");
274 fprintf(output, " -S display packets even when writing to a file\n");
275 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
276 fprintf(output, " -T pdml|ps|psml|text|fields\n");
277 fprintf(output, " format of text output (def: text)\n");
278 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
279 fprintf(output, " this option can be repeated to print multiple fields\n");
280 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
281 fprintf(output, " header=y|n switch headers on and off\n");
282 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
283 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
284 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as aggregator\n");
285 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
286 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
287 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
288 fprintf(output, " -l flush standard output after each packet\n");
289 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
290 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
291 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
293 fprintf(output, "\n");
294 fprintf(output, "Miscellaneous:\n");
295 fprintf(output, " -h display this help and exit\n");
296 fprintf(output, " -v display version info and exit\n");
297 fprintf(output, " -o <name>:<value> ... override preference setting\n");
298 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
299 fprintf(output, " -G [report] dump one of several available reports and exit\n");
300 fprintf(output, " default report=\"fields\"\n");
301 fprintf(output, " use \"-G ?\" for more help\n");
305 glossary_option_help(void)
311 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
313 fprintf(output, "\n");
314 fprintf(output, "Usage: tshark -G [report]\n");
315 fprintf(output, "\n");
316 fprintf(output, "Glossary table reports:\n");
317 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
318 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
319 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
320 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
321 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
322 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
323 fprintf(output, "\n");
324 fprintf(output, "Preference reports:\n");
325 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
326 fprintf(output, " -G currentprefs dump current preferences and exit\n");
327 fprintf(output, "\n");
332 * For a dissector table, print on the stream described by output,
333 * its short name (which is what's used in the "-d" option) and its
337 display_dissector_table_names(const char *table_name, const char *ui_name,
340 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
344 * For a dissector handle, print on the stream described by output,
345 * the filter name (which is what's used in the "-d" option) and the full
346 * name for the protocol that corresponds to this handle.
349 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
352 const gchar* proto_filter_name;
353 const gchar* proto_ui_name;
355 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
357 if (proto_id != -1) {
358 proto_filter_name = proto_get_protocol_filter_name(proto_id);
359 proto_ui_name = proto_get_protocol_name(proto_id);
360 g_assert(proto_filter_name != NULL);
361 g_assert(proto_ui_name != NULL);
363 fprintf((FILE *)output, "\t%s (%s)\n",
370 * The protocol_name_search structure is used by find_protocol_name_func()
371 * to pass parameters and store results
373 struct protocol_name_search{
374 gchar *searched_name; /* Protocol filter name we are looking for */
375 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
376 guint nb_match; /* How many dissectors matched searched_name */
378 typedef struct protocol_name_search *protocol_name_search_t;
381 * This function parses all dissectors associated with a table to find the
382 * one whose protocol has the specified filter name. It is called
383 * as a reference function in a call to dissector_table_foreach_handle.
384 * The name we are looking for, as well as the results, are stored in the
385 * protocol_name_search struct pointed to by user_data.
386 * If called using dissector_table_foreach_handle, we actually parse the
387 * whole list of dissectors.
390 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
394 const gchar *protocol_filter_name;
395 protocol_name_search_t search_info;
399 search_info = (protocol_name_search_t)user_data;
401 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
402 if (proto_id != -1) {
403 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
404 g_assert(protocol_filter_name != NULL);
405 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
407 if (search_info->nb_match == 0) {
408 /* Record this handle only if this is the first match */
409 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
411 search_info->nb_match++;
417 * Print all layer type names supported.
418 * We send the output to the stream described by the handle output.
422 fprint_all_layer_types(FILE *output)
425 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
429 * Print all protocol names supported for a specific layer type.
430 * table_name contains the layer type name in which the search is performed.
431 * We send the output to the stream described by the handle output.
435 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
438 dissector_table_foreach_handle(table_name,
439 display_dissector_names,
444 * The function below parses the command-line parameters for the decode as
445 * feature (a string pointer by cl_param).
446 * It checks the format of the command-line, searches for a matching table
447 * and dissector. If a table/dissector match is not found, we display a
448 * summary of the available tables/dissectors (on stderr) and return FALSE.
449 * If everything is fine, we get the "Decode as" preference activated,
450 * then we return TRUE.
453 add_decode_as(const gchar *cl_param)
457 gchar *decoded_param;
458 gchar *remaining_param;
460 gchar *dissector_str;
461 dissector_handle_t dissector_matching;
462 dissector_table_t table_matching;
463 ftenum_t dissector_table_selector_type;
464 struct protocol_name_search user_protocol_name;
466 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
469 decoded_param = g_strdup(cl_param);
470 g_assert(decoded_param);
473 /* The lines below will parse this string (modifying it) to extract all
474 necessary information. Note that decoded_param is still needed since
475 strings are not copied - we just save pointers. */
477 /* This section extracts a layer type (table_name) from decoded_param */
478 table_name = decoded_param; /* Layer type string starts from beginning */
480 remaining_param = strchr(table_name, '=');
481 if (remaining_param == NULL) {
482 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
483 /* If the argument does not follow the template, carry on anyway to check
484 if the table name is at least correct. If remaining_param is NULL,
485 we'll exit anyway further down */
488 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
491 /* Remove leading and trailing spaces from the table name */
492 while ( table_name[0] == ' ' )
494 while ( table_name[strlen(table_name) - 1] == ' ' )
495 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
497 /* The following part searches a table matching with the layer type specified */
498 table_matching = NULL;
500 /* Look for the requested table */
501 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
502 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
505 table_matching = find_dissector_table(table_name);
506 if (!table_matching) {
507 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
511 if (!table_matching) {
512 /* Display a list of supported layer types to help the user, if the
513 specified layer type was not found */
514 cmdarg_err("Valid layer types are:");
515 fprint_all_layer_types(stderr);
517 if (remaining_param == NULL || !table_matching) {
518 /* Exit if the layer type was not found, or if no '=' separator was found
520 g_free(decoded_param);
524 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
525 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
528 remaining_param++; /* Move to the second '=' */
529 *remaining_param = '\0'; /* Remove the second '=' */
531 remaining_param++; /* Position after the layer type string */
533 /* This section extracts a selector value (selector_str) from decoded_param */
535 selector_str = remaining_param; /* Next part starts with the selector number */
537 remaining_param = strchr(selector_str, ',');
538 if (remaining_param == NULL) {
539 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
540 /* If the argument does not follow the template, carry on anyway to check
541 if the selector value is at least correct. If remaining_param is NULL,
542 we'll exit anyway further down */
545 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
548 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
550 switch (dissector_table_selector_type) {
556 /* The selector for this table is an unsigned number. Parse it as such.
557 There's no need to remove leading and trailing spaces from the
558 selector number string, because sscanf will do that for us. */
559 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
560 cmdarg_err("Invalid selector number \"%s\"", selector_str);
561 g_free(decoded_param);
569 /* The selector for this table is a string. */
573 /* There are currently no dissector tables with any types other
574 than the ones listed above. */
575 g_assert_not_reached();
578 if (remaining_param == NULL) {
579 /* Exit if no ',' separator was found (see above) */
580 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
581 fprint_all_protocols_for_layer_types(stderr, table_name);
582 g_free(decoded_param);
586 remaining_param++; /* Position after the selector number string */
588 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
590 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
592 /* Remove leading and trailing spaces from the dissector name */
593 while ( dissector_str[0] == ' ' )
595 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
596 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
598 dissector_matching = NULL;
600 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
601 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 */
602 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
605 user_protocol_name.nb_match = 0;
606 user_protocol_name.searched_name = dissector_str;
607 user_protocol_name.matched_handle = NULL;
609 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 */
611 if (user_protocol_name.nb_match != 0) {
612 dissector_matching = user_protocol_name.matched_handle;
613 if (user_protocol_name.nb_match > 1) {
614 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
618 /* OK, check whether the problem is that there isn't any such
619 protocol, or that there is but it's not specified as a protocol
620 that's valid for that dissector table.
621 Note, we don't exit here, but dissector_matching will remain NULL,
623 if (proto_get_id_by_filter_name(dissector_str) == -1) {
624 /* No such protocol */
625 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
627 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
628 dissector_str, table_name);
633 if (!dissector_matching) {
634 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
635 fprint_all_protocols_for_layer_types(stderr, table_name);
636 g_free(decoded_param);
640 /* This is the end of the code that parses the command-line options.
641 All information is now stored in the variables:
645 The above variables that are strings are still pointing to areas within
646 decoded_parm. decoded_parm thus still needs to be kept allocated in
647 until we stop needing these variables
648 decoded_param will be deallocated at each exit point of this function */
651 /* We now have a pointer to the handle for the requested dissector
652 (requested protocol) inside the variable dissector_matching */
653 switch (dissector_table_selector_type) {
659 /* The selector for this table is an unsigned number. */
660 dissector_change(table_name, selector, dissector_matching);
666 /* The selector for this table is a string. */
667 dissector_change_string(table_name, selector_str, dissector_matching);
671 /* There are currently no dissector tables with any types other
672 than the ones listed above. */
673 g_assert_not_reached();
675 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
680 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
681 const gchar *message, gpointer user_data)
683 /* ignore log message, if log_level isn't interesting based
684 upon the console log preferences.
685 If the preferences haven't been loaded loaded yet, display the
688 The default console_log_level preference value is such that only
689 ERROR, CRITICAL and WARNING level messages are processed;
690 MESSAGE, INFO and DEBUG level messages are ignored.
692 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
693 ERROR and CRITICAL level messages so the current code is a behavioral
694 change. The current behavior is the same as in Wireshark.
696 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
697 prefs.console_log_level != 0) {
701 g_log_default_handler(log_domain, log_level, message, user_data);
706 output_file_description(const char *fname)
708 char *save_file_string;
710 /* Get a string that describes what we're writing to */
711 if (strcmp(fname, "-") == 0) {
712 /* We're writing to the standard output */
713 save_file_string = g_strdup("standard output");
715 /* We're writing to a file with the name in save_file */
716 save_file_string = g_strdup_printf("file \"%s\"", fname);
718 return save_file_string;
722 print_current_user(void) {
723 gchar *cur_user, *cur_group;
724 if (started_with_special_privs()) {
725 cur_user = get_cur_username();
726 cur_group = get_cur_groupname();
727 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
728 cur_user, cur_group);
731 if (running_with_special_privs()) {
732 fprintf(stderr, " This could be dangerous.");
734 fprintf(stderr, "\n");
739 check_capture_privs(void) {
742 /* Warn the user if npf.sys isn't loaded. */
743 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
744 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
745 "capturing or\nlisting interfaces.\n");
751 show_version(GString *comp_info_str, GString *runtime_info_str)
753 printf("TShark " VERSION "%s\n"
760 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
761 runtime_info_str->str);
765 main(int argc, char *argv[])
767 char *init_progfile_dir_error;
769 gboolean arg_error = FALSE;
775 char *gpf_path, *pf_path;
776 char *gdp_path, *dp_path;
777 int gpf_open_errno, gpf_read_errno;
778 int pf_open_errno, pf_read_errno;
779 int gdp_open_errno, gdp_read_errno;
780 int dp_open_errno, dp_read_errno;
784 gboolean list_link_layer_types = FALSE;
785 gboolean start_capture = FALSE;
790 gboolean capture_option_specified = FALSE;
792 gboolean quiet = FALSE;
793 int out_file_type = WTAP_FILE_PCAP;
794 gchar *cf_name = NULL, *rfilter = NULL;
795 #ifdef HAVE_PCAP_OPEN_DEAD
796 struct bpf_program fcode;
798 dfilter_t *rfcode = NULL;
801 GLogLevelFlags log_flags;
805 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
806 #define OPTSTRING_B "B:"
808 #define OPTSTRING_B ""
809 #endif /* _WIN32 or HAVE_PCAP_CREATE */
810 #else /* HAVE_LIBPCAP */
811 #define OPTSTRING_B ""
812 #endif /* HAVE_LIBPCAP */
814 #ifdef HAVE_PCAP_CREATE
815 #define OPTSTRING_I "I"
817 #define OPTSTRING_I ""
820 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hi:" OPTSTRING_I "K:lLnN:o:pPqr:R:s:St:T:u:vVw:xX:y:z:"
822 static const char optstring[] = OPTSTRING;
825 * Get credential information for later use.
827 init_process_policies();
830 * Attempt to get the pathname of the executable file.
832 init_progfile_dir_error = init_progfile_dir(argv[0], main);
833 if (init_progfile_dir_error != NULL) {
834 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
835 init_progfile_dir_error);
839 * In order to have the -X opts assigned before the wslua machine starts
840 * we need to call getopts before epan_init() gets called.
843 optind_initial = optind;
845 while ((opt = getopt(argc, argv, optstring)) != -1) {
847 case 'C': /* Configuration Profile */
848 if (profile_exists (optarg)) {
849 set_profile_name (optarg);
851 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
863 optind = optind_initial;
868 /** Send All g_log messages to our own handler **/
872 G_LOG_LEVEL_CRITICAL|
877 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
879 g_log_set_handler(NULL,
881 tshark_log_handler, NULL /* user_data */);
882 g_log_set_handler(LOG_DOMAIN_MAIN,
884 tshark_log_handler, NULL /* user_data */);
887 g_log_set_handler(LOG_DOMAIN_CAPTURE,
889 tshark_log_handler, NULL /* user_data */);
890 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
892 tshark_log_handler, NULL /* user_data */);
895 initialize_funnel_ops();
898 capture_opts_init(&global_capture_opts, &cfile);
901 timestamp_set_type(TS_RELATIVE);
902 timestamp_set_precision(TS_PREC_AUTO);
903 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
905 /* Register all dissectors; we must do this before checking for the
906 "-G" flag, as the "-G" flag dumps information registered by the
907 dissectors, and we must do it before we read the preferences, in
908 case any dissectors register preferences. */
909 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
910 failure_message, open_failure_message, read_failure_message,
911 write_failure_message);
913 /* Register all tap listeners; we do this before we parse the arguments,
914 as the "-z" argument can specify a registered tap. */
916 /* we register the plugin taps before the other taps because
917 stats_tree taps plugins will be registered as tap listeners
918 by stats_tree_stat.c and need to registered before that */
920 register_all_plugin_tap_listeners();
922 register_all_tap_listeners();
924 /* Now register the preferences for any non-dissector modules.
925 We must do that before we read the preferences as well. */
926 prefs_register_modules();
928 /* If invoked with the "-G" flag, we dump out information based on
929 the argument to the "-G" flag; if no argument is specified,
930 for backwards compatibility we dump out a glossary of display
933 XXX - we do this here, for now, to support "-G" with no arguments.
934 If none of our build or other processes uses "-G" with no arguments,
935 we can just process it with the other arguments. */
936 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
937 proto_initialize_all_prefixes();
940 proto_registrar_dump_fields(1);
942 if (strcmp(argv[2], "fields") == 0)
943 proto_registrar_dump_fields(1);
944 else if (strcmp(argv[2], "fields2") == 0)
945 proto_registrar_dump_fields(2);
946 else if (strcmp(argv[2], "fields3") == 0)
947 proto_registrar_dump_fields(3);
948 else if (strcmp(argv[2], "protocols") == 0)
949 proto_registrar_dump_protocols();
950 else if (strcmp(argv[2], "values") == 0)
951 proto_registrar_dump_values();
952 else if (strcmp(argv[2], "decodes") == 0)
953 dissector_dump_decodes();
954 else if (strcmp(argv[2], "defaultprefs") == 0)
956 else if (strcmp(argv[2], "?") == 0)
957 glossary_option_help();
958 else if (strcmp(argv[2], "-?") == 0)
959 glossary_option_help();
960 else if (strcmp(argv[2], "currentprefs") == 0) {
961 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
962 &pf_open_errno, &pf_read_errno, &pf_path);
965 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
972 /* Set the C-language locale to the native environment. */
973 setlocale(LC_ALL, "");
975 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
976 &pf_open_errno, &pf_read_errno, &pf_path);
977 if (gpf_path != NULL) {
978 if (gpf_open_errno != 0) {
979 cmdarg_err("Can't open global preferences file \"%s\": %s.",
980 pf_path, strerror(gpf_open_errno));
982 if (gpf_read_errno != 0) {
983 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
984 pf_path, strerror(gpf_read_errno));
987 if (pf_path != NULL) {
988 if (pf_open_errno != 0) {
989 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
990 strerror(pf_open_errno));
992 if (pf_read_errno != 0) {
993 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
994 pf_path, strerror(pf_read_errno));
1000 /* Set the name resolution code's flags from the preferences. */
1001 g_resolv_flags = prefs_p->name_resolve;
1003 /* Read the disabled protocols file. */
1004 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1005 &dp_path, &dp_open_errno, &dp_read_errno);
1006 if (gdp_path != NULL) {
1007 if (gdp_open_errno != 0) {
1008 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1009 gdp_path, strerror(gdp_open_errno));
1011 if (gdp_read_errno != 0) {
1012 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1013 gdp_path, strerror(gdp_read_errno));
1017 if (dp_path != NULL) {
1018 if (dp_open_errno != 0) {
1020 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1021 strerror(dp_open_errno));
1023 if (dp_read_errno != 0) {
1025 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1026 strerror(dp_read_errno));
1031 check_capture_privs();
1033 cap_file_init(&cfile);
1035 /* Print format defaults to this. */
1036 print_format = PR_FMT_TEXT;
1038 output_fields = output_fields_new();
1040 /* Now get our args */
1041 while ((opt = getopt(argc, argv, optstring)) != -1) {
1043 case 'a': /* autostop criteria */
1044 case 'b': /* Ringbuffer option */
1045 case 'c': /* Capture x packets */
1046 case 'f': /* capture filter */
1047 case 'i': /* Use interface x */
1048 case 'p': /* Don't capture in promiscuous mode */
1049 #ifdef HAVE_PCAP_CREATE
1050 case 'I': /* Capture in monitor mode, if available */
1052 case 's': /* Set the snapshot (capture) length */
1053 case 'w': /* Write to capture file x */
1054 case 'y': /* Set the pcap data link type */
1055 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1056 case 'B': /* Buffer size */
1057 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1059 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1064 capture_option_specified = TRUE;
1069 /* Configuration profile settings were already processed just ignore them this time*/
1071 case 'd': /* Decode as rule */
1072 if (!add_decode_as(optarg))
1075 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1076 case 'K': /* Kerberos keytab file */
1077 read_keytab_file(optarg);
1080 case 'D': /* Print a list of capture devices and exit */
1082 if_list = capture_interface_list(&err, &err_str);
1083 if (if_list == NULL) {
1085 case CANT_GET_INTERFACE_LIST:
1086 cmdarg_err("%s", err_str);
1090 case NO_INTERFACES_FOUND:
1091 cmdarg_err("There are no interfaces on which a capture can be done");
1096 capture_opts_print_interfaces(if_list);
1097 free_interface_list(if_list);
1100 capture_option_specified = TRUE;
1106 output_fields_add(output_fields, optarg);
1110 if(!output_fields_set_option(output_fields, optarg)) {
1111 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1112 output_fields_list_options(stderr);
1117 out_file_type = wtap_short_string_to_file_type(optarg);
1118 if (out_file_type < 0) {
1119 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1120 list_capture_types();
1124 case 'h': /* Print help and exit */
1128 case 'l': /* "Line-buffer" standard output */
1129 /* This isn't line-buffering, strictly speaking, it's just
1130 flushing the standard output after the information for
1131 each packet is printed; however, that should be good
1132 enough for all the purposes to which "-l" is put (and
1133 is probably actually better for "-V", as it does fewer
1136 See the comment in "process_packet()" for an explanation of
1137 why we do that, and why we don't just use "setvbuf()" to
1138 make the standard output line-buffered (short version: in
1139 Windows, "line-buffered" is the same as "fully-buffered",
1140 and the output buffer is only flushed when it fills up). */
1141 line_buffered = TRUE;
1143 case 'L': /* Print list of link-layer types and exit */
1145 list_link_layer_types = TRUE;
1147 capture_option_specified = TRUE;
1151 #if GLIB_CHECK_VERSION(2,10,0)
1152 case 'P': /* Perform two pass analysis */
1153 perform_two_pass_analysis = TRUE;
1156 case 'n': /* No name resolution */
1157 g_resolv_flags = RESOLV_NONE;
1159 case 'N': /* Select what types of addresses/port #s to resolve */
1160 if (g_resolv_flags == RESOLV_ALL)
1161 g_resolv_flags = RESOLV_NONE;
1162 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1163 if (badopt != '\0') {
1164 cmdarg_err("-N specifies unknown resolving option '%c';",
1166 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1170 case 'o': /* Override preference from command line */
1171 switch (prefs_set_pref(optarg)) {
1176 case PREFS_SET_SYNTAX_ERR:
1177 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1181 case PREFS_SET_NO_SUCH_PREF:
1182 case PREFS_SET_OBSOLETE:
1183 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1188 case 'q': /* Quiet */
1191 case 'r': /* Read capture file x */
1192 cf_name = g_strdup(optarg);
1194 case 'R': /* Read file filter */
1197 case 'S': /* show packets in real time */
1198 print_packet_info = TRUE;
1200 case 't': /* Time stamp type */
1201 if (strcmp(optarg, "r") == 0)
1202 timestamp_set_type(TS_RELATIVE);
1203 else if (strcmp(optarg, "a") == 0)
1204 timestamp_set_type(TS_ABSOLUTE);
1205 else if (strcmp(optarg, "ad") == 0)
1206 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1207 else if (strcmp(optarg, "d") == 0)
1208 timestamp_set_type(TS_DELTA);
1209 else if (strcmp(optarg, "dd") == 0)
1210 timestamp_set_type(TS_DELTA_DIS);
1211 else if (strcmp(optarg, "e") == 0)
1212 timestamp_set_type(TS_EPOCH);
1214 cmdarg_err("Invalid time stamp type \"%s\"",
1216 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1217 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1221 case 'T': /* printing Type */
1222 if (strcmp(optarg, "text") == 0) {
1223 output_action = WRITE_TEXT;
1224 print_format = PR_FMT_TEXT;
1225 } else if (strcmp(optarg, "ps") == 0) {
1226 output_action = WRITE_TEXT;
1227 print_format = PR_FMT_PS;
1228 } else if (strcmp(optarg, "pdml") == 0) {
1229 output_action = WRITE_XML;
1231 } else if (strcmp(optarg, "psml") == 0) {
1232 output_action = WRITE_XML;
1234 } else if(strcmp(optarg, "fields") == 0) {
1235 output_action = WRITE_FIELDS;
1236 verbose = TRUE; /* Need full tree info */
1238 cmdarg_err("Invalid -T parameter.");
1239 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1243 case 'u': /* Seconds type */
1244 if (strcmp(optarg, "s") == 0)
1245 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1246 else if (strcmp(optarg, "hms") == 0)
1247 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1249 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1250 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1254 case 'v': /* Show version and exit */
1256 GString *comp_info_str;
1257 GString *runtime_info_str;
1258 /* Assemble the compile-time version information string */
1259 comp_info_str = g_string_new("Compiled ");
1260 get_compiled_version_info(comp_info_str, epan_get_compiled_version_info);
1262 /* Assemble the run-time version information string */
1263 runtime_info_str = g_string_new("Running ");
1264 get_runtime_version_info(runtime_info_str, NULL);
1265 show_version(comp_info_str, runtime_info_str);
1266 g_string_free(comp_info_str, TRUE);
1267 g_string_free(runtime_info_str, TRUE);
1271 case 'V': /* Verbose */
1273 /* The user asked for a verbose output, so let's ensure they get it,
1274 * even if they're writing to a file.
1276 print_packet_info = TRUE;
1278 case 'x': /* Print packet data in hex (and ASCII) */
1280 /* The user asked for hex output, so let's ensure they get it,
1281 * even if they're writing to a file.
1283 print_packet_info = TRUE;
1288 /* We won't call the init function for the stat this soon
1289 as it would disallow MATE's fields (which are registered
1290 by the preferences set callback) from being used as
1291 part of a tap filter. Instead, we just add the argument
1292 to a list of stat arguments. */
1293 if (!process_stat_cmd_arg(optarg)) {
1294 cmdarg_err("invalid -z argument.");
1295 cmdarg_err_cont(" -z argument must be one of :");
1296 list_stat_cmd_args();
1301 case '?': /* Bad flag - print usage message */
1304 list_capture_types();
1314 /* If we specified output fields, but not the output field type... */
1315 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1316 cmdarg_err("Output fields were specified with \"-e\", "
1317 "but \"-Tfields\" was not specified.");
1319 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1320 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1321 "specified with \"-e\".");
1326 /* If no capture filter or read filter has been specified, and there are
1327 still command-line arguments, treat them as the tokens of a capture
1328 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1329 flag was specified. */
1330 if (optind < argc) {
1331 if (cf_name != NULL) {
1332 if (rfilter != NULL) {
1333 cmdarg_err("Read filters were specified both with \"-R\" "
1334 "and with additional command-line arguments");
1337 rfilter = get_args_as_string(argc, argv, optind);
1340 if (global_capture_opts.has_cfilter) {
1341 cmdarg_err("Capture filters were specified both with \"-f\""
1342 " and with additional command-line arguments");
1345 global_capture_opts.has_cfilter = TRUE;
1346 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1348 capture_option_specified = TRUE;
1354 if (!global_capture_opts.saving_to_file) {
1355 /* We're not saving the capture to a file; if "-q" wasn't specified,
1356 we should print packet information */
1358 print_packet_info = TRUE;
1360 /* We're saving to a file; if we're writing to the standard output.
1361 and we'll also be writing dissected packets to the standard
1362 output, reject the request. At best, we could redirect that
1363 to the standard error; we *can't* write both to the standard
1364 output and have either of them be useful. */
1365 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1366 cmdarg_err("You can't write both raw packet data and dissected packets"
1367 " to the standard output.");
1372 /* We're not saving the capture to a file; if "-q" wasn't specified,
1373 we should print packet information */
1375 print_packet_info = TRUE;
1378 #ifndef HAVE_LIBPCAP
1379 if (capture_option_specified)
1380 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1387 /* We don't support capture filters when reading from a capture file
1388 (the BPF compiler doesn't support all link-layer types that we
1389 support in capture files we read). */
1391 if (cf_name != NULL) {
1392 if (global_capture_opts.has_cfilter) {
1393 cmdarg_err("Only read filters, not capture filters, "
1394 "can be specified when reading a capture file.");
1401 if (output_action != WRITE_TEXT) {
1402 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1408 if (list_link_layer_types) {
1409 /* We're supposed to list the link-layer types for an interface;
1410 did the user also specify a capture file to be read? */
1412 /* Yes - that's bogus. */
1413 cmdarg_err("You can't specify -L and a capture file to be read.");
1416 /* No - did they specify a ring buffer option? */
1417 if (global_capture_opts.multi_files_on) {
1418 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1424 * "-r" was specified, so we're reading a capture file.
1425 * Capture options don't apply here.
1427 if (global_capture_opts.multi_files_on) {
1428 cmdarg_err("Multiple capture files requested, but "
1429 "a capture isn't being done.");
1432 if (global_capture_opts.has_file_duration) {
1433 cmdarg_err("Switching capture files after a time interval was specified, but "
1434 "a capture isn't being done.");
1437 if (global_capture_opts.has_ring_num_files) {
1438 cmdarg_err("A ring buffer of capture files was specified, but "
1439 "a capture isn't being done.");
1442 if (global_capture_opts.has_autostop_files) {
1443 cmdarg_err("A maximum number of capture files was specified, but "
1444 "a capture isn't being done.");
1448 /* Note: TShark now allows the restriction of a _read_ file by packet count
1449 * and byte count as well as a write file. Other autostop options remain valid
1450 * only for a write file.
1452 if (global_capture_opts.has_autostop_duration) {
1453 cmdarg_err("A maximum capture time was specified, but "
1454 "a capture isn't being done.");
1459 * "-r" wasn't specified, so we're doing a live capture.
1461 if (global_capture_opts.saving_to_file) {
1462 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1464 /* When capturing, we only support writing libpcap format. */
1465 if (out_file_type != WTAP_FILE_PCAP) {
1466 cmdarg_err("Live captures can only be saved in libpcap format.");
1469 if (global_capture_opts.multi_files_on) {
1470 /* Multiple-file mode doesn't work under certain conditions:
1471 a) it doesn't work if you're writing to the standard output;
1472 b) it doesn't work if you're writing to a pipe;
1474 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1475 cmdarg_err("Multiple capture files requested, but "
1476 "the capture is being written to the standard output.");
1479 if (global_capture_opts.output_to_pipe) {
1480 cmdarg_err("Multiple capture files requested, but "
1481 "the capture file is a pipe.");
1484 if (!global_capture_opts.has_autostop_filesize &&
1485 !global_capture_opts.has_file_duration) {
1486 cmdarg_err("Multiple capture files requested, but "
1487 "no maximum capture file size or duration was specified.");
1491 /* Currently, we don't support read filters when capturing
1492 and saving the packets. */
1493 if (rfilter != NULL) {
1494 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1498 /* They didn't specify a "-w" flag, so we won't be saving to a
1499 capture file. Check for options that only make sense if
1500 we're saving to a file. */
1501 if (global_capture_opts.has_autostop_filesize) {
1502 cmdarg_err("Maximum capture file size specified, but "
1503 "capture isn't being saved to a file.");
1506 if (global_capture_opts.multi_files_on) {
1507 cmdarg_err("Multiple capture files requested, but "
1508 "the capture isn't being saved to a file.");
1517 /* Start windows sockets */
1518 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1521 /* Notify all registered modules that have had any of their preferences
1522 changed either from one of the preferences file or from the command
1523 line that their preferences have changed. */
1526 /* At this point MATE will have registered its field array so we can
1527 have a tap filter with one of MATE's late-registered fields as part
1528 of the filter. We can now process all the "-z" arguments. */
1529 start_requested_stats();
1532 /* We currently don't support taps, or printing dissected packets,
1533 if we're writing to a pipe. */
1534 if (global_capture_opts.saving_to_file &&
1535 global_capture_opts.output_to_pipe) {
1536 if (have_tap_listeners()) {
1537 cmdarg_err("Taps aren't supported when saving to a pipe.");
1540 if (print_packet_info) {
1541 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1547 /* disabled protocols as per configuration file */
1548 if (gdp_path == NULL && dp_path == NULL) {
1549 set_disabled_protos_list();
1552 /* Build the column format array */
1553 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1556 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1557 capture_opts_trim_ring_num_files(&global_capture_opts);
1560 if (rfilter != NULL) {
1561 if (!dfilter_compile(rfilter, &rfcode)) {
1562 cmdarg_err("%s", dfilter_error_msg);
1564 #ifdef HAVE_PCAP_OPEN_DEAD
1568 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1570 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1572 " Note: That display filter code looks like a valid capture filter;");
1574 " maybe you mixed them up?");
1583 cfile.rfcode = rfcode;
1585 if (print_packet_info) {
1586 /* If we're printing as text or PostScript, we have
1587 to create a print stream. */
1588 if (output_action == WRITE_TEXT) {
1589 switch (print_format) {
1592 print_stream = print_stream_text_stdio_new(stdout);
1596 print_stream = print_stream_ps_stdio_new(stdout);
1600 g_assert_not_reached();
1605 /* We have to dissect each packet if:
1607 we're printing information about each packet;
1609 we're using a read filter on the packets;
1611 we're using any taps. */
1612 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1616 * We're reading a capture file.
1620 * Immediately relinquish any special privileges we have; we must not
1621 * be allowed to read any capture files the user running TShark
1624 relinquish_special_privs_perm();
1625 print_current_user();
1627 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1632 /* Set timestamp precision; there should arguably be a command-line
1633 option to let the user set this. */
1634 switch(wtap_file_tsprecision(cfile.wth)) {
1635 case(WTAP_FILE_TSPREC_SEC):
1636 timestamp_set_precision(TS_PREC_AUTO_SEC);
1638 case(WTAP_FILE_TSPREC_DSEC):
1639 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1641 case(WTAP_FILE_TSPREC_CSEC):
1642 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1644 case(WTAP_FILE_TSPREC_MSEC):
1645 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1647 case(WTAP_FILE_TSPREC_USEC):
1648 timestamp_set_precision(TS_PREC_AUTO_USEC);
1650 case(WTAP_FILE_TSPREC_NSEC):
1651 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1654 g_assert_not_reached();
1657 /* Process the packets in the file */
1659 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1660 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1661 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1663 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1666 /* We still dump out the results of taps, etc., as we might have
1667 read some packets; however, we exit with an error status. */
1671 /* No capture file specified, so we're supposed to do a live capture
1672 (or get a list of link-layer types for a live capture device);
1673 do we have support for live captures? */
1680 cmdarg_err("WinPcap couldn't be found.");
1681 detailed_err = cant_load_winpcap_err("TShark");
1682 cmdarg_err_cont("%s", detailed_err);
1683 g_free(detailed_err);
1688 /* trim the interface name and exit if that failed */
1689 if (!capture_opts_trim_iface(&global_capture_opts,
1690 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1694 /* if requested, list the link layer types and exit */
1695 if (list_link_layer_types) {
1696 /* Get the list of link-layer types for the capture device. */
1697 if_capabilities_t *caps;
1699 caps = capture_get_if_capabilities(global_capture_opts.iface,
1700 global_capture_opts.monitor_mode,
1703 cmdarg_err("%s", err_str);
1707 if (caps->data_link_types == NULL) {
1708 cmdarg_err("The capture device \"%s\" has no data link types.", global_capture_opts.iface);
1711 capture_opts_print_if_capabilities(caps,
1712 global_capture_opts.monitor_mode);
1713 free_if_capabilities(caps);
1717 if (print_packet_info) {
1718 if (!write_preamble(NULL)) {
1719 show_print_file_io_error(errno);
1722 } else if (!quiet) {
1724 * We're not printing information for each packet, and the user
1725 * didn't ask us not to print a count of packets as they arrive,
1726 * so print that count so the user knows that packets are arriving.
1728 * XXX - what if the user wants to do a live capture, doesn't want
1729 * to save it to a file, doesn't want information printed for each
1730 * packet, does want some "-z" statistic, and wants packet counts
1731 * so they know whether they're seeing any packets?
1733 print_packet_counts = TRUE;
1736 /* For now, assume libpcap gives microsecond precision. */
1737 timestamp_set_precision(TS_PREC_AUTO_USEC);
1740 * XXX - this returns FALSE if an error occurred, but it also
1741 * returns FALSE if the capture stops because a time limit
1742 * was reached (and possibly other limits), so we can't assume
1743 * it means an error.
1745 * The capture code is a bit twisty, so it doesn't appear to
1746 * be an easy fix. We just ignore the return value for now.
1747 * Instead, pass on the exit status from the capture child.
1750 exit_status = global_capture_opts.fork_child_status;
1752 if (print_packet_info) {
1753 if (!write_finale()) {
1755 show_print_file_io_error(err);
1759 /* No - complain. */
1760 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1767 #if GLIB_CHECK_VERSION(2,10,0)
1768 if (cfile.plist_start != NULL)
1769 g_slice_free_chain(frame_data, cfile.plist_start, next);
1772 draw_tap_listeners(TRUE);
1773 funnel_dump_all_text_windows();
1776 output_fields_free(output_fields);
1777 output_fields = NULL;
1782 /*#define USE_BROKEN_G_MAIN_LOOP*/
1784 #ifdef USE_BROKEN_G_MAIN_LOOP
1787 gboolean loop_running = FALSE;
1789 guint32 packet_count = 0;
1792 /* XXX - move to the right position / file */
1793 /* read from a pipe (callback) */
1794 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1796 typedef struct pipe_input_tag {
1800 pipe_input_cb_t input_cb;
1801 guint pipe_input_id;
1803 GStaticMutex callback_running;
1807 static pipe_input_t pipe_input;
1810 /* The timer has expired, see if there's stuff to read from the pipe,
1811 if so, do the callback */
1813 pipe_timer_cb(gpointer data)
1817 gboolean result, result1;
1819 pipe_input_t *pipe_input = data;
1820 gint iterations = 0;
1823 g_static_mutex_lock (&pipe_input->callback_running);
1825 /* try to read data from the pipe only 5 times, to avoid blocking */
1826 while(iterations < 5) {
1827 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1829 /* Oddly enough although Named pipes don't work on win9x,
1830 PeekNamedPipe does !!! */
1831 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1832 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1834 /* Get the child process exit status */
1835 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1838 /* If the Peek returned an error, or there are bytes to be read
1839 or the childwatcher thread has terminated then call the normal
1841 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1843 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1845 /* And call the real handler */
1846 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1847 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1848 /* pipe closed, return false so that the timer is stopped */
1849 g_static_mutex_unlock (&pipe_input->callback_running);
1854 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1855 /* No data, stop now */
1862 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1864 g_static_mutex_unlock (&pipe_input->callback_running);
1866 /* we didn't stopped the timer, so let it run */
1873 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1876 pipe_input.source = source;
1877 pipe_input.child_process = child_process;
1878 pipe_input.user_data = user_data;
1879 pipe_input.input_cb = input_cb;
1882 g_static_mutex_init(&pipe_input.callback_running);
1883 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1884 do this but that doesn't cover all win32 platforms. GTK can do
1885 this but doesn't seem to work over processes. Attempt to do
1886 something similar here, start a timer and check for data on every
1888 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1889 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1899 #ifdef USE_TSHARK_SELECT
1903 struct sigaction action, oldaction;
1907 * XXX - dropping privileges is still required, until code cleanup is done
1909 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1910 * when it's done, we don't need special privileges to run tshark at all,
1911 * therefore we don't need to drop these privileges
1912 * The only thing we might want to keep is a warning if tshark is run as root,
1913 * as it's no longer necessary and potentially dangerous.
1915 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1916 * We've opened the capture device, so we shouldn't need any special
1917 * privileges any more; relinquish those privileges.
1919 * XXX - if we have saved set-user-ID support, we should give up those
1920 * privileges immediately, and then reclaim them long enough to get
1921 * a list of network interfaces and to open one, and then give them
1922 * up again, so that stuff we do while processing the argument list,
1923 * reading the user's preferences, loading and starting plugins
1924 * (especially *user* plugins), etc. is done with the user's privileges,
1925 * not special privileges.
1927 relinquish_special_privs_perm();
1928 print_current_user();
1930 /* Cleanup all data structures used for dissection. */
1931 cleanup_dissection();
1932 /* Initialize all data structures used for dissection. */
1936 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1937 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1939 /* Catch SIGINT and SIGTERM and, if we get either of them,
1940 clean up and exit. If SIGHUP isn't being ignored, catch
1941 it too and, if we get it, clean up and exit.
1943 We restart any read that was in progress, so that it doesn't
1944 disrupt reading from the sync pipe. The signal handler tells
1945 the capture child to finish; it will report that it finished,
1946 or will exit abnormally, so we'll stop reading from the sync
1947 pipe, pick up the exit status, and quit. */
1948 action.sa_handler = capture_cleanup;
1949 action.sa_flags = SA_RESTART;
1950 sigemptyset(&action.sa_mask);
1951 sigaction(SIGTERM, &action, NULL);
1952 sigaction(SIGINT, &action, NULL);
1953 sigaction(SIGHUP, NULL, &oldaction);
1954 if (oldaction.sa_handler == SIG_DFL)
1955 sigaction(SIGHUP, &action, NULL);
1958 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1959 quiet mode, report the number of packets we've captured.
1961 Again, restart any read that was in progress, so that it doesn't
1962 disrupt reading from the sync pipe. */
1963 action.sa_handler = report_counts_siginfo;
1964 action.sa_flags = SA_RESTART;
1965 sigemptyset(&action.sa_mask);
1966 sigaction(SIGINFO, &action, NULL);
1967 #endif /* SIGINFO */
1970 global_capture_opts.state = CAPTURE_PREPARING;
1972 /* Let the user know what interface was chosen. */
1973 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1974 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1976 ret = sync_pipe_start(&global_capture_opts);
1981 /* the actual capture loop
1983 * XXX - glib doesn't seem to provide any event based loop handling.
1985 * XXX - for whatever reason,
1986 * calling g_main_loop_new() ends up in 100% cpu load.
1988 * But that doesn't matter: in UNIX we can use select() to find an input
1989 * source with something to do.
1991 * But that doesn't matter because we're in a CLI (that doesn't need to
1992 * update a GUI or something at the same time) so it's OK if we block
1993 * trying to read from the pipe.
1995 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1996 * wrong (but I leave it there in case I am...).
1999 #ifdef USE_TSHARK_SELECT
2001 FD_SET(pipe_input.source, &readfds);
2004 loop_running = TRUE;
2006 while (loop_running)
2008 #ifdef USE_TSHARK_SELECT
2009 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2015 } else if (ret == 1) {
2017 /* Call the real handler */
2018 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2019 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2022 #ifdef USE_TSHARK_SELECT
2031 /* XXX - move the call to main_window_update() out of capture_sync.c */
2032 /* dummy for capture_sync.c to make linker happy */
2033 void main_window_update(void)
2037 /* capture child detected an error */
2039 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2041 cmdarg_err("%s", error_msg);
2042 cmdarg_err_cont("%s", secondary_error_msg);
2046 /* capture child detected an capture filter related error */
2048 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
2050 dfilter_t *rfcode = NULL;
2053 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
2055 "Invalid capture filter: \"%s\"!\n"
2057 "That string looks like a valid display filter; however, it isn't a valid\n"
2058 "capture filter (%s).\n"
2060 "Note that display filters and capture filters don't have the same syntax,\n"
2061 "so you can't use most display filter expressions as capture filters.\n"
2063 "See the User's Guide for a description of the capture filter syntax.",
2064 capture_opts->cfilter, error_message);
2065 dfilter_free(rfcode);
2068 "Invalid capture filter: \"%s\"!\n"
2070 "That string isn't a valid capture filter (%s).\n"
2071 "See the User's Guide for a description of the capture filter syntax.",
2072 capture_opts->cfilter, error_message);
2077 /* capture child tells us we have a new (or the first) capture file */
2079 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2081 gboolean is_tempfile;
2085 if(capture_opts->state == CAPTURE_PREPARING) {
2086 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2088 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2090 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2092 /* free the old filename */
2093 if (capture_opts->save_file != NULL) {
2095 /* we start a new capture file, close the old one (if we had one before) */
2096 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2097 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2098 wtap_close(((capture_file *) capture_opts->cf)->wth);
2100 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2103 g_free(capture_opts->save_file);
2104 is_tempfile = FALSE;
2106 /* we didn't had a save_file before, must be a tempfile */
2110 /* save the new filename */
2111 capture_opts->save_file = g_strdup(new_file);
2113 /* if we are in real-time mode, open the new file now */
2115 /* Attempt to open the capture file and set up to read from it. */
2116 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2120 /* Don't unlink (delete) the save file - leave it around,
2121 for debugging purposes. */
2122 g_free(capture_opts->save_file);
2123 capture_opts->save_file = NULL;
2128 capture_opts->state = CAPTURE_RUNNING;
2134 /* capture child tells us we have new packets to read */
2136 capture_input_new_packets(capture_options *capture_opts, int to_read)
2142 capture_file *cf = capture_opts->cf;
2143 gboolean filtering_tap_listeners;
2148 * Prevent a SIGINFO handler from writing to the standard error while
2149 * we're doing so or writing to the standard output; instead, have it
2150 * just set a flag telling us to print that information when we're done.
2153 #endif /* SIGINFO */
2155 /* Do we have any tap listeners with filters? */
2156 filtering_tap_listeners = have_filtering_tap_listeners();
2158 /* Get the union of the flags for all tap listeners. */
2159 tap_flags = union_of_tap_listener_flags();
2162 while (to_read-- && cf->wth) {
2163 wtap_cleareof(cf->wth);
2164 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2166 /* read from file failed, tell the capture child to stop */
2167 sync_pipe_stop(capture_opts);
2168 wtap_close(cf->wth);
2171 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2172 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2173 filtering_tap_listeners, tap_flags);
2176 /* packet sucessfully read and gone through the "Read Filter" */
2182 * Dumpcap's doing all the work; we're not doing any dissection.
2183 * Count all the packets it wrote.
2185 packet_count += to_read;
2188 if (print_packet_counts) {
2189 /* We're printing packet counts. */
2190 if (packet_count != 0) {
2191 fprintf(stderr, "\r%u ", packet_count);
2192 /* stderr could be line buffered */
2199 * Allow SIGINFO handlers to write.
2204 * If a SIGINFO handler asked us to write out capture counts, do so.
2208 #endif /* SIGINFO */
2214 if (!print_packet_counts) {
2215 /* Report the count only if we aren't printing a packet count
2216 as packets arrive. */
2217 fprintf(stderr, "%u packet%s captured\n", packet_count,
2218 plurality(packet_count, "", "s"));
2221 infoprint = FALSE; /* we just reported it */
2222 #endif /* SIGINFO */
2227 report_counts_siginfo(int signum _U_)
2229 int sav_errno = errno;
2230 /* If we've been told to delay printing, just set a flag asking
2231 that we print counts (if we're supposed to), otherwise print
2232 the count of packets captured (if we're supposed to). */
2239 #endif /* SIGINFO */
2242 /* capture child detected any packet drops? */
2244 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2246 if (print_packet_counts) {
2247 /* We're printing packet counts to stderr.
2248 Send a newline so that we move to the line after the packet count. */
2249 fprintf(stderr, "\n");
2253 /* We're printing packet counts to stderr.
2254 Send a newline so that we move to the line after the packet count. */
2255 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2261 * Capture child closed its side of the pipe, report any error and
2262 * do the required cleanup.
2265 capture_input_closed(capture_options *capture_opts, gchar *msg)
2268 fprintf(stderr, "tshark: %s\n", msg);
2272 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2273 wtap_close(((capture_file *) capture_opts->cf)->wth);
2275 #ifdef USE_BROKEN_G_MAIN_LOOP
2276 /*g_main_loop_quit(loop);*/
2279 loop_running = FALSE;
2288 capture_cleanup(DWORD ctrltype _U_)
2290 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2291 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2292 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2293 like SIGTERM at least when the machine's shutting down.
2295 For now, we handle them all as indications that we should clean up
2296 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2299 We must return TRUE so that no other handler - such as one that would
2300 terminate the process - gets called.
2302 XXX - for some reason, typing ^C to TShark, if you run this in
2303 a Cygwin console window in at least some versions of Cygwin,
2304 causes TShark to terminate immediately; this routine gets
2305 called, but the main loop doesn't get a chance to run and
2306 exit cleanly, at least if this is compiled with Microsoft Visual
2307 C++ (i.e., it's a property of the Cygwin console window or Bash;
2308 it happens if TShark is not built with Cygwin - for all I know,
2309 building it with Cygwin may make the problem go away). */
2311 /* tell the capture child to stop */
2312 sync_pipe_stop(&global_capture_opts);
2314 /* don't stop our own loop already here, otherwise status messages and
2315 * cleanup wouldn't be done properly. The child will indicate the stop of
2316 * everything by calling capture_input_closed() later */
2322 capture_cleanup(int signum _U_)
2324 /* tell the capture child to stop */
2325 sync_pipe_stop(&global_capture_opts);
2327 /* don't stop our own loop already here, otherwise status messages and
2328 * cleanup wouldn't be done properly. The child will indicate the stop of
2329 * everything by calling capture_input_closed() later */
2332 #endif /* HAVE_LIBPCAP */
2334 #if GLIB_CHECK_VERSION(2,10,0)
2336 process_packet_first_pass(capture_file *cf,
2337 gint64 offset, const struct wtap_pkthdr *whdr,
2338 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2340 frame_data *fdata = g_slice_new(frame_data);
2344 /* Count this packet. */
2347 /* If we're not running a display filter and we're not printing any
2348 packet information, we don't need to do a dissection. This means
2349 that all packets can be marked as 'passed'. */
2352 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2354 /* If we're going to print packet information, or we're going to
2355 run a read filter, or we're going to process taps, set up to
2356 do a dissection and do so. */
2357 if (do_dissection) {
2359 /* Grab any resolved addresses */
2360 host_name_lookup_process(NULL);
2362 /* The protocol tree will be "visible", i.e., printed, only if we're
2363 printing packet details, which is true if we're printing stuff
2364 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2366 epan_dissect_init(&edt, FALSE, FALSE);
2368 /* If we're running a read filter, prime the epan_dissect_t with that
2371 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2373 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2374 &first_ts, &prev_dis_ts, &prev_cap_ts);
2376 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2378 /* Run the read filter if we have one. */
2380 passed = dfilter_apply_edt(cf->rfcode, &edt);
2384 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2385 cap_file_add_fdata(cf, fdata);
2388 g_slice_free(frame_data, fdata);
2391 epan_dissect_cleanup(&edt);
2397 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2398 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2399 gboolean filtering_tap_listeners, guint tap_flags)
2401 gboolean create_proto_tree;
2406 /* If we're not running a display filter and we're not printing any
2407 packet information, we don't need to do a dissection. This means
2408 that all packets can be marked as 'passed'. */
2411 /* If we're going to print packet information, or we're going to
2412 run a read filter, or we're going to process taps, set up to
2413 do a dissection and do so. */
2414 if (do_dissection) {
2416 /* Grab any resolved addresses */
2417 host_name_lookup_process(NULL);
2419 if (cf->rfcode || verbose || filtering_tap_listeners ||
2420 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2421 create_proto_tree = TRUE;
2423 create_proto_tree = FALSE;
2425 /* The protocol tree will be "visible", i.e., printed, only if we're
2426 printing packet details, which is true if we're printing stuff
2427 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2429 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2431 /* If we're running a read filter, prime the epan_dissect_t with that
2434 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2436 col_custom_prime_edt(&edt, &cf->cinfo);
2438 tap_queue_init(&edt);
2440 /* We only need the columns if either
2442 1) some tap needs the columns
2446 2) we're printing packet info but we're *not* verbose; in verbose
2447 mode, we print the protocol tree, not the protocol summary. */
2448 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2453 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2455 tap_push_tapped_queue(&edt);
2457 /* Run the read filter if we have one. */
2459 passed = dfilter_apply_edt(cf->rfcode, &edt);
2463 /* Process this packet. */
2464 if (print_packet_info) {
2465 /* We're printing packet information; print the information for
2468 print_packet(cf, &edt);
2470 print_packet(cf, NULL);
2472 /* The ANSI C standard does not appear to *require* that a line-buffered
2473 stream be flushed to the host environment whenever a newline is
2474 written, it just says that, on such a stream, characters "are
2475 intended to be transmitted to or from the host environment as a
2476 block when a new-line character is encountered".
2478 The Visual C++ 6.0 C implementation doesn't do what is intended;
2479 even if you set a stream to be line-buffered, it still doesn't
2480 flush the buffer at the end of every line.
2482 So, if the "-l" flag was specified, we flush the standard output
2483 at the end of a packet. This will do the right thing if we're
2484 printing packet summary lines, and, as we print the entire protocol
2485 tree for a single packet without waiting for anything to happen,
2486 it should be as good as line-buffered mode if we're printing
2487 protocol trees. (The whole reason for the "-l" flag in either
2488 tcpdump or TShark is to allow the output of a live capture to
2489 be piped to a program or script and to have that script see the
2490 information for the packet as soon as it's printed, rather than
2491 having to wait until a standard I/O buffer fills up. */
2495 if (ferror(stdout)) {
2496 show_print_file_io_error(errno);
2502 if (do_dissection) {
2503 epan_dissect_cleanup(&edt);
2510 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2511 int max_packet_count, gint64 max_byte_count)
2514 int snapshot_length;
2519 char *save_file_string = NULL;
2520 gboolean filtering_tap_listeners;
2523 linktype = wtap_file_encap(cf->wth);
2524 if (save_file != NULL) {
2525 /* Get a string that describes what we're writing to */
2526 save_file_string = output_file_description(save_file);
2528 /* Set up to write to the capture file. */
2529 snapshot_length = wtap_snapshot_length(cf->wth);
2530 if (snapshot_length == 0) {
2531 /* Snapshot length of input file not known. */
2532 snapshot_length = WTAP_MAX_PACKET_SIZE;
2534 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2535 FALSE /* compressed */, &err);
2538 /* We couldn't set up to write to the capture file. */
2541 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2542 cmdarg_err("Capture files can't be written in that format.");
2545 case WTAP_ERR_UNSUPPORTED_ENCAP:
2546 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2547 cmdarg_err("The capture file being read can't be written in "
2551 case WTAP_ERR_CANT_OPEN:
2552 cmdarg_err("The %s couldn't be created for some "
2553 "unknown reason.", save_file_string);
2556 case WTAP_ERR_SHORT_WRITE:
2557 cmdarg_err("A full header couldn't be written to the %s.",
2562 cmdarg_err("The %s could not be created: %s.", save_file_string,
2563 wtap_strerror(err));
2569 if (print_packet_info) {
2570 if (!write_preamble(cf)) {
2572 show_print_file_io_error(err);
2579 /* Do we have any tap listeners with filters? */
2580 filtering_tap_listeners = have_filtering_tap_listeners();
2582 /* Get the union of the flags for all tap listeners. */
2583 tap_flags = union_of_tap_listener_flags();
2585 if (perform_two_pass_analysis) {
2586 #if GLIB_CHECK_VERSION(2,10,0)
2588 int old_max_packet_count = max_packet_count;
2590 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2591 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2592 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2593 /* Stop reading if we have the maximum number of packets;
2594 * When the -c option has not been used, max_packet_count
2595 * starts at 0, which practically means, never stop reading.
2596 * (unless we roll over max_packet_count ?)
2598 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2599 err = 0; /* This is not an error */
2605 /* Close the sequential I/O side, to free up memory it requires. */
2606 wtap_sequential_close(cf->wth);
2608 /* Allow the protocol dissectors to free up memory that they
2609 * don't need after the sequential run-through of the packets. */
2610 postseq_cleanup_all_protocols();
2612 max_packet_count = old_max_packet_count;
2614 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2615 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2616 cf->pd, fdata->cap_len, &err, &err_info)) {
2617 if (process_packet_second_pass(cf, fdata,
2618 &cf->pseudo_header, cf->pd,
2619 filtering_tap_listeners, tap_flags)) {
2620 /* Either there's no read filtering or this packet passed the
2621 filter, so, if we're writing to a capture file, write
2624 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2625 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2627 /* Error writing to a capture file */
2628 show_capture_file_io_error(save_file, err, FALSE);
2629 wtap_dump_close(pdh, &err);
2633 /* Stop reading if we have the maximum number of packets;
2634 * When the -c option has not been used, max_packet_count
2635 * starts at 0, which practically means, never stop reading.
2636 * (unless we roll over max_packet_count ?)
2638 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2639 err = 0; /* This is not an error */
2648 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2649 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2650 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2651 filtering_tap_listeners, tap_flags)) {
2652 /* Either there's no read filtering or this packet passed the
2653 filter, so, if we're writing to a capture file, write
2656 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2657 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2659 /* Error writing to a capture file */
2660 show_capture_file_io_error(save_file, err, FALSE);
2661 wtap_dump_close(pdh, &err);
2665 /* Stop reading if we have the maximum number of packets;
2666 * When the -c option has not been used, max_packet_count
2667 * starts at 0, which practically means, never stop reading.
2668 * (unless we roll over max_packet_count ?)
2670 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2671 err = 0; /* This is not an error */
2680 * Print a message noting that the read failed somewhere along the line.
2682 * If we're printing packet data, and the standard output and error are
2683 * going to the same place, flush the standard output, so everything
2684 * buffered up is written, and then print a newline to the standard error
2685 * before printing the error message, to separate it from the packet
2686 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2687 * the _fstat() documentation at Microsoft doesn't indicate whether
2688 * st_ino is even supported.)
2691 if (print_packet_info) {
2692 struct stat stat_stdout, stat_stderr;
2694 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2695 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2696 stat_stdout.st_ino == stat_stderr.st_ino) {
2698 fprintf(stderr, "\n");
2705 case WTAP_ERR_UNSUPPORTED_ENCAP:
2706 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2707 cf->filename, err_info);
2711 case WTAP_ERR_CANT_READ:
2712 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2716 case WTAP_ERR_SHORT_READ:
2717 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2721 case WTAP_ERR_BAD_RECORD:
2722 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2723 cf->filename, err_info);
2728 cmdarg_err("An error occurred while reading \"%s\": %s.",
2729 cf->filename, wtap_strerror(err));
2732 if (save_file != NULL) {
2733 /* Now close the capture file. */
2734 if (!wtap_dump_close(pdh, &err))
2735 show_capture_file_io_error(save_file, err, TRUE);
2738 if (save_file != NULL) {
2739 /* Now close the capture file. */
2740 if (!wtap_dump_close(pdh, &err))
2741 show_capture_file_io_error(save_file, err, TRUE);
2743 if (print_packet_info) {
2744 if (!write_finale()) {
2746 show_print_file_io_error(err);
2753 wtap_close(cf->wth);
2756 g_free(save_file_string);
2762 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2763 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2764 gboolean filtering_tap_listeners, guint tap_flags)
2767 gboolean create_proto_tree;
2772 /* Count this packet. */
2775 /* If we're not running a display filter and we're not printing any
2776 packet information, we don't need to do a dissection. This means
2777 that all packets can be marked as 'passed'. */
2780 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2782 /* If we're going to print packet information, or we're going to
2783 run a read filter, or we're going to process taps, set up to
2784 do a dissection and do so. */
2785 if (do_dissection) {
2786 if (print_packet_info && g_resolv_flags)
2787 /* Grab any resolved addresses */
2788 host_name_lookup_process(NULL);
2790 if (cf->rfcode || verbose || filtering_tap_listeners ||
2791 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2792 create_proto_tree = TRUE;
2794 create_proto_tree = FALSE;
2796 /* The protocol tree will be "visible", i.e., printed, only if we're
2797 printing packet details, which is true if we're printing stuff
2798 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2800 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2802 /* If we're running a read filter, prime the epan_dissect_t with that
2805 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2807 col_custom_prime_edt(&edt, &cf->cinfo);
2809 tap_queue_init(&edt);
2811 /* We only need the columns if either
2813 1) some tap needs the columns
2817 2) we're printing packet info but we're *not* verbose; in verbose
2818 mode, we print the protocol tree, not the protocol summary. */
2819 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2824 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2825 &first_ts, &prev_dis_ts, &prev_cap_ts);
2827 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2829 tap_push_tapped_queue(&edt);
2831 /* Run the read filter if we have one. */
2833 passed = dfilter_apply_edt(cf->rfcode, &edt);
2837 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2839 /* Process this packet. */
2840 if (print_packet_info) {
2841 /* We're printing packet information; print the information for
2844 print_packet(cf, &edt);
2846 print_packet(cf, NULL);
2848 /* The ANSI C standard does not appear to *require* that a line-buffered
2849 stream be flushed to the host environment whenever a newline is
2850 written, it just says that, on such a stream, characters "are
2851 intended to be transmitted to or from the host environment as a
2852 block when a new-line character is encountered".
2854 The Visual C++ 6.0 C implementation doesn't do what is intended;
2855 even if you set a stream to be line-buffered, it still doesn't
2856 flush the buffer at the end of every line.
2858 So, if the "-l" flag was specified, we flush the standard output
2859 at the end of a packet. This will do the right thing if we're
2860 printing packet summary lines, and, as we print the entire protocol
2861 tree for a single packet without waiting for anything to happen,
2862 it should be as good as line-buffered mode if we're printing
2863 protocol trees. (The whole reason for the "-l" flag in either
2864 tcpdump or TShark is to allow the output of a live capture to
2865 be piped to a program or script and to have that script see the
2866 information for the packet as soon as it's printed, rather than
2867 having to wait until a standard I/O buffer fills up. */
2871 if (ferror(stdout)) {
2872 show_print_file_io_error(errno);
2878 if (do_dissection) {
2879 epan_dissect_cleanup(&edt);
2880 frame_data_cleanup(&fdata);
2886 write_preamble(capture_file *cf)
2888 switch (output_action) {
2891 return print_preamble(print_stream, cf ? cf->filename : NULL);
2895 write_pdml_preamble(stdout);
2897 write_psml_preamble(stdout);
2898 return !ferror(stdout);
2901 write_fields_preamble(output_fields, stdout);
2902 return !ferror(stdout);
2905 g_assert_not_reached();
2911 get_line_buf(size_t len)
2913 static char *line_bufp = NULL;
2914 static size_t line_buf_len = 256;
2915 size_t new_line_buf_len;
2917 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2918 new_line_buf_len *= 2)
2920 if (line_bufp == NULL) {
2921 line_buf_len = new_line_buf_len;
2922 line_bufp = g_malloc(line_buf_len + 1);
2924 if (new_line_buf_len > line_buf_len) {
2925 line_buf_len = new_line_buf_len;
2926 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2933 print_columns(capture_file *cf)
2940 line_bufp = get_line_buf(256);
2943 for (i = 0; i < cf->cinfo.num_cols; i++) {
2944 switch (cf->cinfo.col_fmt[i]) {
2948 * Don't print this if we're doing a live capture from a network
2949 * interface - if we're doing a live capture, you won't be
2950 * able to look at the capture in the future (it's not being
2951 * saved anywhere), so the frame numbers are unlikely to be
2954 * (XXX - it might be nice to be able to save and print at
2955 * the same time, sort of like an "Update list of packets
2956 * in real time" capture in Wireshark.)
2958 if (global_capture_opts.iface != NULL)
2961 column_len = strlen(cf->cinfo.col_data[i]);
2964 line_bufp = get_line_buf(buf_offset + column_len);
2965 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2971 case COL_ABS_DATE_TIME: /* XXX - wider */
2972 column_len = strlen(cf->cinfo.col_data[i]);
2973 if (column_len < 10)
2975 line_bufp = get_line_buf(buf_offset + column_len);
2976 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2982 case COL_DEF_DL_SRC:
2983 case COL_RES_DL_SRC:
2984 case COL_UNRES_DL_SRC:
2985 case COL_DEF_NET_SRC:
2986 case COL_RES_NET_SRC:
2987 case COL_UNRES_NET_SRC:
2988 column_len = strlen(cf->cinfo.col_data[i]);
2989 if (column_len < 12)
2991 line_bufp = get_line_buf(buf_offset + column_len);
2992 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2998 case COL_DEF_DL_DST:
2999 case COL_RES_DL_DST:
3000 case COL_UNRES_DL_DST:
3001 case COL_DEF_NET_DST:
3002 case COL_RES_NET_DST:
3003 case COL_UNRES_NET_DST:
3004 column_len = strlen(cf->cinfo.col_data[i]);
3005 if (column_len < 12)
3007 line_bufp = get_line_buf(buf_offset + column_len);
3008 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
3012 column_len = strlen(cf->cinfo.col_data[i]);
3013 line_bufp = get_line_buf(buf_offset + column_len);
3014 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
3017 buf_offset += column_len;
3018 if (i != cf->cinfo.num_cols - 1) {
3020 * This isn't the last column, so we need to print a
3021 * separator between this column and the next.
3023 * If we printed a network source and are printing a
3024 * network destination of the same type next, separate
3025 * them with "->"; if we printed a network destination
3026 * and are printing a network source of the same type
3027 * next, separate them with "<-"; otherwise separate them
3030 * We add enough space to the buffer for " <- " or " -> ",
3031 * even if we're only adding " ".
3033 line_bufp = get_line_buf(buf_offset + 4);
3034 switch (cf->cinfo.col_fmt[i]) {
3039 switch (cf->cinfo.col_fmt[i + 1]) {
3044 strcat(line_bufp + buf_offset, " -> ");
3049 strcat(line_bufp + buf_offset, " ");
3055 case COL_DEF_DL_SRC:
3056 case COL_RES_DL_SRC:
3057 case COL_UNRES_DL_SRC:
3058 switch (cf->cinfo.col_fmt[i + 1]) {
3060 case COL_DEF_DL_DST:
3061 case COL_RES_DL_DST:
3062 case COL_UNRES_DL_DST:
3063 strcat(line_bufp + buf_offset, " -> ");
3068 strcat(line_bufp + buf_offset, " ");
3074 case COL_DEF_NET_SRC:
3075 case COL_RES_NET_SRC:
3076 case COL_UNRES_NET_SRC:
3077 switch (cf->cinfo.col_fmt[i + 1]) {
3079 case COL_DEF_NET_DST:
3080 case COL_RES_NET_DST:
3081 case COL_UNRES_NET_DST:
3082 strcat(line_bufp + buf_offset, " -> ");
3087 strcat(line_bufp + buf_offset, " ");
3096 switch (cf->cinfo.col_fmt[i + 1]) {
3101 strcat(line_bufp + buf_offset, " <- ");
3106 strcat(line_bufp + buf_offset, " ");
3112 case COL_DEF_DL_DST:
3113 case COL_RES_DL_DST:
3114 case COL_UNRES_DL_DST:
3115 switch (cf->cinfo.col_fmt[i + 1]) {
3117 case COL_DEF_DL_SRC:
3118 case COL_RES_DL_SRC:
3119 case COL_UNRES_DL_SRC:
3120 strcat(line_bufp + buf_offset, " <- ");
3125 strcat(line_bufp + buf_offset, " ");
3131 case COL_DEF_NET_DST:
3132 case COL_RES_NET_DST:
3133 case COL_UNRES_NET_DST:
3134 switch (cf->cinfo.col_fmt[i + 1]) {
3136 case COL_DEF_NET_SRC:
3137 case COL_RES_NET_SRC:
3138 case COL_UNRES_NET_SRC:
3139 strcat(line_bufp + buf_offset, " <- ");
3144 strcat(line_bufp + buf_offset, " ");
3151 strcat(line_bufp + buf_offset, " ");
3157 return print_line(print_stream, 0, line_bufp);
3161 print_packet(capture_file *cf, epan_dissect_t *edt)
3163 print_args_t print_args;
3166 /* Print the information in the protocol tree. */
3167 switch (output_action) {
3170 print_args.to_file = TRUE;
3171 print_args.format = print_format;
3172 print_args.print_summary = !verbose;
3173 print_args.print_hex = verbose && print_hex;
3174 print_args.print_formfeed = FALSE;
3175 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3177 /* init the packet range */
3178 packet_range_init(&print_args.range);
3180 if (!proto_tree_print(&print_args, edt, print_stream))
3183 /* "print_hex_data()" will put out a leading blank line, as well
3184 as a trailing one; print one here, to separate the packets,
3185 only if "print_hex_data()" won't be called. */
3186 if (!print_line(print_stream, 0, ""))
3192 proto_tree_write_pdml(edt, stdout);
3194 return !ferror(stdout);
3196 proto_tree_write_fields(output_fields, edt, stdout);
3198 return !ferror(stdout);
3201 /* Just fill in the columns. */
3202 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3204 /* Now print them. */
3205 switch (output_action) {
3208 if (!print_columns(cf))
3213 proto_tree_write_psml(edt, stdout);
3214 return !ferror(stdout);
3215 case WRITE_FIELDS: /*No non-verbose "fields" format */
3216 g_assert_not_reached();
3221 if (!print_hex_data(print_stream, edt))
3223 if (!print_line(print_stream, 0, ""))
3232 switch (output_action) {
3235 return print_finale(print_stream);
3239 write_pdml_finale(stdout);
3241 write_psml_finale(stdout);
3242 return !ferror(stdout);
3245 write_fields_finale(output_fields, stdout);
3246 return !ferror(stdout);
3249 g_assert_not_reached();
3255 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3259 char err_msg[2048+1];
3261 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3265 /* The open succeeded. Fill in the information for this file. */
3267 /* Cleanup all data structures used for dissection. */
3268 cleanup_dissection();
3269 /* Initialize all data structures used for dissection. */
3273 cf->f_datalen = 0; /* not used, but set it anyway */
3275 /* Set the file name because we need it to set the follow stream filter.
3276 XXX - is that still true? We need it for other reasons, though,
3278 cf->filename = g_strdup(fname);
3280 /* Indicate whether it's a permanent or temporary file. */
3281 cf->is_tempfile = is_tempfile;
3283 /* If it's a temporary capture buffer file, mark it as not saved. */
3284 cf->user_saved = !is_tempfile;
3286 cf->cd_t = wtap_file_type(cf->wth);
3288 cf->drops_known = FALSE;
3290 cf->snap = wtap_snapshot_length(cf->wth);
3291 if (cf->snap == 0) {
3292 /* Snapshot length not known. */
3293 cf->has_snap = FALSE;
3294 cf->snap = WTAP_MAX_PACKET_SIZE;
3296 cf->has_snap = TRUE;
3297 nstime_set_zero(&cf->elapsed_time);
3298 nstime_set_unset(&first_ts);
3299 nstime_set_unset(&prev_dis_ts);
3300 nstime_set_unset(&prev_cap_ts);
3302 cf->state = FILE_READ_IN_PROGRESS;
3307 g_snprintf(err_msg, sizeof err_msg,
3308 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3309 cmdarg_err("%s", err_msg);
3314 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3316 char *save_file_string;
3318 save_file_string = output_file_description(fname);
3323 cmdarg_err("Not all the packets could be written to the %s because there is "
3324 "no space left on the file system.",
3330 cmdarg_err("Not all the packets could be written to the %s because you are "
3331 "too close to, or over your disk quota.",
3336 case WTAP_ERR_CANT_CLOSE:
3337 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3341 case WTAP_ERR_SHORT_WRITE:
3342 cmdarg_err("Not all the packets could be written to the %s.",
3348 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3349 wtap_strerror(err));
3351 cmdarg_err("An error occurred while writing to the %s: %s.",
3352 save_file_string, wtap_strerror(err));
3356 g_free(save_file_string);
3360 show_print_file_io_error(int err)
3365 cmdarg_err("Not all the packets could be printed because there is "
3366 "no space left on the file system.");
3371 cmdarg_err("Not all the packets could be printed because you are "
3372 "too close to, or over your disk quota.");
3377 cmdarg_err("An error occurred while printing packets: %s.",
3384 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3388 static char errmsg_errno[1024+1];
3391 /* Wiretap error. */
3394 case WTAP_ERR_NOT_REGULAR_FILE:
3395 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3398 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3399 /* Seen only when opening a capture file for reading. */
3400 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3403 case WTAP_ERR_UNSUPPORTED:
3404 /* Seen only when opening a capture file for reading. */
3405 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3406 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3409 errmsg = errmsg_errno;
3412 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3413 /* Seen only when opening a capture file for writing. */
3414 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3415 "The file \"%%s\" is a pipe, and %s capture files can't be "
3416 "written to a pipe.", wtap_file_type_string(file_type));
3417 errmsg = errmsg_errno;
3420 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3421 /* Seen only when opening a capture file for writing. */
3422 errmsg = "TShark doesn't support writing capture files in that format.";
3425 case WTAP_ERR_UNSUPPORTED_ENCAP:
3427 errmsg = "TShark can't save this capture in that format.";
3429 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3430 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3433 errmsg = errmsg_errno;
3437 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3439 errmsg = "TShark can't save this capture in that format.";
3441 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3444 case WTAP_ERR_BAD_RECORD:
3445 /* Seen only when opening a capture file for reading. */
3446 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3447 "The file \"%%s\" appears to be damaged or corrupt.\n"
3450 errmsg = errmsg_errno;
3453 case WTAP_ERR_CANT_OPEN:
3455 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3457 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3460 case WTAP_ERR_SHORT_READ:
3461 errmsg = "The file \"%s\" appears to have been cut short"
3462 " in the middle of a packet or other data.";
3465 case WTAP_ERR_SHORT_WRITE:
3466 errmsg = "A full header couldn't be written to the file \"%s\".";
3470 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3471 "The file \"%%s\" could not be %s: %s.",
3472 for_writing ? "created" : "opened",
3473 wtap_strerror(err));
3474 errmsg = errmsg_errno;
3478 errmsg = file_open_error_message(err, for_writing);
3483 * Open/create errors are reported with an console message in TShark.
3486 open_failure_message(const char *filename, int err, gboolean for_writing)
3488 fprintf(stderr, "tshark: ");
3489 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3490 fprintf(stderr, "\n");
3495 * General errors are reported with an console message in TShark.
3498 failure_message(const char *msg_format, va_list ap)
3500 fprintf(stderr, "tshark: ");
3501 vfprintf(stderr, msg_format, ap);
3502 fprintf(stderr, "\n");
3506 * Read errors are reported with an console message in TShark.
3509 read_failure_message(const char *filename, int err)
3511 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3512 filename, strerror(err));
3516 * Write errors are reported with an console message in TShark.
3519 write_failure_message(const char *filename, int err)
3521 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3522 filename, strerror(err));
3526 * Print to the standard error. This is a command-line tool, so there's
3527 * no need to pop up a console.
3530 vfprintf_stderr(const char *fmt, va_list ap)
3532 vfprintf(stderr, fmt, ap);
3536 fprintf_stderr(const char *fmt, ...)
3541 vfprintf_stderr(fmt, ap);
3546 * Report an error in command-line arguments.
3549 cmdarg_err(const char *fmt, ...)
3554 failure_message(fmt, ap);
3559 * Report additional information for an error in command-line arguments.
3562 cmdarg_err_cont(const char *fmt, ...)
3567 vfprintf(stderr, fmt, ap);
3568 fprintf(stderr, "\n");