3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
55 #include "wsutil/strerror.h"
61 #include "wsutil/wsgetopt.h"
65 #include <epan/epan.h>
66 #include <epan/filesystem.h>
67 #include <wsutil/privileges.h>
68 #include <wsutil/file_util.h>
71 #include <epan/timestamp.h>
72 #include <epan/packet.h>
74 #include "disabled_protos.h"
75 #include <epan/prefs.h>
76 #include <epan/column.h>
78 #include <epan/addr_resolv.h>
80 #include "clopts_common.h"
81 #include "console_io.h"
82 #include "cmdarg_err.h"
83 #include "version_info.h"
84 #include <epan/plugins.h>
86 #include <epan/epan_dissect.h>
88 #include <epan/stat_cmd_args.h>
89 #include <epan/timestamp.h>
90 #include <epan/ex-opt.h>
93 #include "capture_ui_utils.h"
94 #include "capture_ifinfo.h"
95 #include "capture-pcap-util.h"
97 #include "capture-wpcap.h"
98 #include "capture_errs.h"
101 #include "capture_sync.h"
102 #endif /* HAVE_LIBPCAP */
104 #include <epan/funnel.h>
106 #define MSG_MAX_LENGTH 4096
109 * This is the template for the decode as option; it is shared between the
110 * various functions that output the usage for this parameter.
112 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
114 static guint32 cum_bytes;
115 static nstime_t first_ts;
116 static nstime_t prev_dis_ts;
117 static nstime_t prev_cap_ts;
119 static gboolean print_packet_info; /* TRUE if we're to print packet information */
121 static gboolean perform_two_pass_analysis;
124 * The way the packet decode is to be written.
127 WRITE_TEXT, /* summary or detail text */
128 WRITE_XML, /* PDML or PSML */
129 WRITE_FIELDS /* User defined list of fields */
130 /* Add CSV and the like here */
133 static output_action_e output_action;
134 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
135 static gboolean verbose;
136 static gboolean print_hex;
137 static gboolean line_buffered;
139 static print_format_e print_format = PR_FMT_TEXT;
140 static print_stream_t *print_stream;
142 static output_fields_t* output_fields = NULL;
146 * TRUE if we're to print packet counts to keep track of captured packets.
148 static gboolean print_packet_counts;
151 static capture_options global_capture_opts;
154 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
155 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
158 static gboolean capture(void);
159 static void report_counts(void);
161 static BOOL WINAPI capture_cleanup(DWORD);
163 static void capture_cleanup(int);
165 static void report_counts_siginfo(int);
168 #endif /* HAVE_LIBPCAP */
170 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
171 static gboolean process_packet(capture_file *cf, gint64 offset,
172 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
173 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
174 static void show_capture_file_io_error(const char *, int, gboolean);
175 static void show_print_file_io_error(int err);
176 static gboolean write_preamble(capture_file *cf);
177 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
178 static gboolean write_finale(void);
179 static const char *cf_open_error_message(int err, gchar *err_info,
180 gboolean for_writing, int file_type);
182 static void open_failure_message(const char *filename, int err,
183 gboolean for_writing);
184 static void failure_message(const char *msg_format, va_list ap);
185 static void read_failure_message(const char *filename, int err);
186 static void write_failure_message(const char *filename, int err);
191 const char *sstr; /* The short string */
192 const char *lstr; /* The long string */
196 string_compare(gconstpointer a, gconstpointer b)
198 return strcmp(((struct string_elem *)a)->sstr,
199 ((struct string_elem *)b)->sstr);
203 string_elem_print(gpointer data, gpointer not_used _U_)
205 fprintf(stderr, " %s - %s\n",
206 ((struct string_elem *)data)->sstr,
207 ((struct string_elem *)data)->lstr);
211 list_capture_types(void) {
213 struct string_elem *captypes;
216 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
218 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
219 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
220 if (wtap_dump_can_open(i)) {
221 captypes[i].sstr = wtap_file_type_short_string(i);
222 captypes[i].lstr = wtap_file_type_string(i);
223 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
226 g_slist_foreach(list, string_elem_print, NULL);
232 print_usage(gboolean print_ver)
239 "TShark " VERSION "%s\n"
240 "Dump and analyze network traffic.\n"
241 "See http://www.wireshark.org for more information.\n"
244 wireshark_svnversion, get_copyright_info());
248 fprintf(output, "\n");
249 fprintf(output, "Usage: tshark [options] ...\n");
250 fprintf(output, "\n");
253 fprintf(output, "Capture interface:\n");
254 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
255 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
256 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
257 fprintf(output, " -p don't capture in promiscuous mode\n");
258 #ifdef HAVE_PCAP_CREATE
259 fprintf(output, " -I capture in monitor mode, if available\n");
261 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
262 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
264 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
265 fprintf(output, " -D print list of interfaces and exit\n");
266 fprintf(output, " -L print list of link-layer types of iface and exit\n");
267 fprintf(output, "\n");
268 fprintf(output, "Capture stop conditions:\n");
269 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
270 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
271 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
272 fprintf(output, " files:NUM - stop after NUM files\n");
273 /*fprintf(output, "\n");*/
274 fprintf(output, "Capture output:\n");
275 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
276 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
277 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
278 #endif /* HAVE_LIBPCAP */
280 /*fprintf(output, "\n");*/
281 fprintf(output, "Input file:\n");
282 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
284 fprintf(output, "\n");
285 fprintf(output, "Processing:\n");
286 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
287 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
288 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
289 fprintf(output, " -d %s ...\n", decode_as_arg_template);
290 fprintf(output, " \"Decode As\", see the man page for details\n");
291 fprintf(output, " Example: tcp.port==8888,http\n");
293 /*fprintf(output, "\n");*/
294 fprintf(output, "Output:\n");
295 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
296 fprintf(output, " (or to the standard output for \"-\")\n");
297 fprintf(output, " -C <config profile> start with specified configuration profile\n");
298 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
299 fprintf(output, " an empty \"-F\" option will list the file types\n");
300 fprintf(output, " -V add output of packet tree (Packet Details)\n");
301 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
302 fprintf(output, " separated\n");
303 fprintf(output, " -S display packets even when writing to a file\n");
304 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
305 fprintf(output, " -T pdml|ps|psml|text|fields\n");
306 fprintf(output, " format of text output (def: text)\n");
307 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
308 fprintf(output, " this option can be repeated to print multiple fields\n");
309 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
310 fprintf(output, " header=y|n switch headers on and off\n");
311 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
312 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
313 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
314 fprintf(output, " aggregator\n");
315 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
316 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
317 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
318 fprintf(output, " -l flush standard output after each packet\n");
319 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
320 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
321 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
323 fprintf(output, "\n");
324 fprintf(output, "Miscellaneous:\n");
325 fprintf(output, " -h display this help and exit\n");
326 fprintf(output, " -v display version info and exit\n");
327 fprintf(output, " -o <name>:<value> ... override preference setting\n");
328 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
329 fprintf(output, " -G [report] dump one of several available reports and exit\n");
330 fprintf(output, " default report=\"fields\"\n");
331 fprintf(output, " use \"-G ?\" for more help\n");
335 glossary_option_help(void)
341 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
343 fprintf(output, "\n");
344 fprintf(output, "Usage: tshark -G [report]\n");
345 fprintf(output, "\n");
346 fprintf(output, "Glossary table reports:\n");
347 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
348 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
349 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
350 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
351 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
352 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
353 fprintf(output, "\n");
354 fprintf(output, "Preference reports:\n");
355 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
356 fprintf(output, " -G currentprefs dump current preferences and exit\n");
357 fprintf(output, "\n");
362 * For a dissector table, print on the stream described by output,
363 * its short name (which is what's used in the "-d" option) and its
367 display_dissector_table_names(const char *table_name, const char *ui_name,
370 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
374 * For a dissector handle, print on the stream described by output,
375 * the filter name (which is what's used in the "-d" option) and the full
376 * name for the protocol that corresponds to this handle.
379 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
382 const gchar* proto_filter_name;
383 const gchar* proto_ui_name;
385 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
387 if (proto_id != -1) {
388 proto_filter_name = proto_get_protocol_filter_name(proto_id);
389 proto_ui_name = proto_get_protocol_name(proto_id);
390 g_assert(proto_filter_name != NULL);
391 g_assert(proto_ui_name != NULL);
393 fprintf((FILE *)output, "\t%s (%s)\n",
400 * The protocol_name_search structure is used by find_protocol_name_func()
401 * to pass parameters and store results
403 struct protocol_name_search{
404 gchar *searched_name; /* Protocol filter name we are looking for */
405 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
406 guint nb_match; /* How many dissectors matched searched_name */
408 typedef struct protocol_name_search *protocol_name_search_t;
411 * This function parses all dissectors associated with a table to find the
412 * one whose protocol has the specified filter name. It is called
413 * as a reference function in a call to dissector_table_foreach_handle.
414 * The name we are looking for, as well as the results, are stored in the
415 * protocol_name_search struct pointed to by user_data.
416 * If called using dissector_table_foreach_handle, we actually parse the
417 * whole list of dissectors.
420 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
424 const gchar *protocol_filter_name;
425 protocol_name_search_t search_info;
429 search_info = (protocol_name_search_t)user_data;
431 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
432 if (proto_id != -1) {
433 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
434 g_assert(protocol_filter_name != NULL);
435 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
437 if (search_info->nb_match == 0) {
438 /* Record this handle only if this is the first match */
439 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
441 search_info->nb_match++;
447 * Print all layer type names supported.
448 * We send the output to the stream described by the handle output.
452 fprint_all_layer_types(FILE *output)
455 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
459 * Print all protocol names supported for a specific layer type.
460 * table_name contains the layer type name in which the search is performed.
461 * We send the output to the stream described by the handle output.
465 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
468 dissector_table_foreach_handle(table_name,
469 display_dissector_names,
474 * The function below parses the command-line parameters for the decode as
475 * feature (a string pointer by cl_param).
476 * It checks the format of the command-line, searches for a matching table
477 * and dissector. If a table/dissector match is not found, we display a
478 * summary of the available tables/dissectors (on stderr) and return FALSE.
479 * If everything is fine, we get the "Decode as" preference activated,
480 * then we return TRUE.
483 add_decode_as(const gchar *cl_param)
487 gchar *decoded_param;
488 gchar *remaining_param;
490 gchar *dissector_str;
491 dissector_handle_t dissector_matching;
492 dissector_table_t table_matching;
493 ftenum_t dissector_table_selector_type;
494 struct protocol_name_search user_protocol_name;
496 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
499 decoded_param = g_strdup(cl_param);
500 g_assert(decoded_param);
503 /* The lines below will parse this string (modifying it) to extract all
504 necessary information. Note that decoded_param is still needed since
505 strings are not copied - we just save pointers. */
507 /* This section extracts a layer type (table_name) from decoded_param */
508 table_name = decoded_param; /* Layer type string starts from beginning */
510 remaining_param = strchr(table_name, '=');
511 if (remaining_param == NULL) {
512 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
513 /* If the argument does not follow the template, carry on anyway to check
514 if the table name is at least correct. If remaining_param is NULL,
515 we'll exit anyway further down */
518 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
521 /* Remove leading and trailing spaces from the table name */
522 while ( table_name[0] == ' ' )
524 while ( table_name[strlen(table_name) - 1] == ' ' )
525 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
527 /* The following part searches a table matching with the layer type specified */
528 table_matching = NULL;
530 /* Look for the requested table */
531 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
532 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
535 table_matching = find_dissector_table(table_name);
536 if (!table_matching) {
537 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
541 if (!table_matching) {
542 /* Display a list of supported layer types to help the user, if the
543 specified layer type was not found */
544 cmdarg_err("Valid layer types are:");
545 fprint_all_layer_types(stderr);
547 if (remaining_param == NULL || !table_matching) {
548 /* Exit if the layer type was not found, or if no '=' separator was found
550 g_free(decoded_param);
554 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
555 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
558 remaining_param++; /* Move to the second '=' */
559 *remaining_param = '\0'; /* Remove the second '=' */
561 remaining_param++; /* Position after the layer type string */
563 /* This section extracts a selector value (selector_str) from decoded_param */
565 selector_str = remaining_param; /* Next part starts with the selector number */
567 remaining_param = strchr(selector_str, ',');
568 if (remaining_param == NULL) {
569 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
570 /* If the argument does not follow the template, carry on anyway to check
571 if the selector value is at least correct. If remaining_param is NULL,
572 we'll exit anyway further down */
575 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
578 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
580 switch (dissector_table_selector_type) {
586 /* The selector for this table is an unsigned number. Parse it as such.
587 There's no need to remove leading and trailing spaces from the
588 selector number string, because sscanf will do that for us. */
589 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
590 cmdarg_err("Invalid selector number \"%s\"", selector_str);
591 g_free(decoded_param);
599 /* The selector for this table is a string. */
603 /* There are currently no dissector tables with any types other
604 than the ones listed above. */
605 g_assert_not_reached();
608 if (remaining_param == NULL) {
609 /* Exit if no ',' separator was found (see above) */
610 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
611 fprint_all_protocols_for_layer_types(stderr, table_name);
612 g_free(decoded_param);
616 remaining_param++; /* Position after the selector number string */
618 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
620 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
622 /* Remove leading and trailing spaces from the dissector name */
623 while ( dissector_str[0] == ' ' )
625 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
626 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
628 dissector_matching = NULL;
630 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
631 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 */
632 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
635 user_protocol_name.nb_match = 0;
636 user_protocol_name.searched_name = dissector_str;
637 user_protocol_name.matched_handle = NULL;
639 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 */
641 if (user_protocol_name.nb_match != 0) {
642 dissector_matching = user_protocol_name.matched_handle;
643 if (user_protocol_name.nb_match > 1) {
644 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
648 /* OK, check whether the problem is that there isn't any such
649 protocol, or that there is but it's not specified as a protocol
650 that's valid for that dissector table.
651 Note, we don't exit here, but dissector_matching will remain NULL,
653 if (proto_get_id_by_filter_name(dissector_str) == -1) {
654 /* No such protocol */
655 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
657 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
658 dissector_str, table_name);
663 if (!dissector_matching) {
664 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
665 fprint_all_protocols_for_layer_types(stderr, table_name);
666 g_free(decoded_param);
670 /* This is the end of the code that parses the command-line options.
671 All information is now stored in the variables:
675 The above variables that are strings are still pointing to areas within
676 decoded_parm. decoded_parm thus still needs to be kept allocated in
677 until we stop needing these variables
678 decoded_param will be deallocated at each exit point of this function */
681 /* We now have a pointer to the handle for the requested dissector
682 (requested protocol) inside the variable dissector_matching */
683 switch (dissector_table_selector_type) {
689 /* The selector for this table is an unsigned number. */
690 dissector_change_uint(table_name, selector, dissector_matching);
696 /* The selector for this table is a string. */
697 dissector_change_string(table_name, selector_str, dissector_matching);
701 /* There are currently no dissector tables with any types other
702 than the ones listed above. */
703 g_assert_not_reached();
705 g_free(decoded_param); /* "Decode As" rule has been successfully added */
710 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
711 const gchar *message, gpointer user_data)
713 /* ignore log message, if log_level isn't interesting based
714 upon the console log preferences.
715 If the preferences haven't been loaded loaded yet, display the
718 The default console_log_level preference value is such that only
719 ERROR, CRITICAL and WARNING level messages are processed;
720 MESSAGE, INFO and DEBUG level messages are ignored.
722 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
723 ERROR and CRITICAL level messages so the current code is a behavioral
724 change. The current behavior is the same as in Wireshark.
726 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
727 prefs.console_log_level != 0) {
731 g_log_default_handler(log_domain, log_level, message, user_data);
736 output_file_description(const char *fname)
738 char *save_file_string;
740 /* Get a string that describes what we're writing to */
741 if (strcmp(fname, "-") == 0) {
742 /* We're writing to the standard output */
743 save_file_string = g_strdup("standard output");
745 /* We're writing to a file with the name in save_file */
746 save_file_string = g_strdup_printf("file \"%s\"", fname);
748 return save_file_string;
752 print_current_user(void) {
753 gchar *cur_user, *cur_group;
754 if (started_with_special_privs()) {
755 cur_user = get_cur_username();
756 cur_group = get_cur_groupname();
757 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
758 cur_user, cur_group);
761 if (running_with_special_privs()) {
762 fprintf(stderr, " This could be dangerous.");
764 fprintf(stderr, "\n");
769 check_capture_privs(void) {
772 /* Warn the user if npf.sys isn't loaded. */
773 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
774 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
775 "capturing or\nlisting interfaces.\n");
781 show_version(GString *comp_info_str, GString *runtime_info_str)
783 printf("TShark " VERSION "%s\n"
790 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
791 runtime_info_str->str);
795 main(int argc, char *argv[])
797 char *init_progfile_dir_error;
799 gboolean arg_error = FALSE;
807 char *gpf_path, *pf_path;
808 char *gdp_path, *dp_path;
809 int gpf_open_errno, gpf_read_errno;
810 int pf_open_errno, pf_read_errno;
811 int gdp_open_errno, gdp_read_errno;
812 int dp_open_errno, dp_read_errno;
816 gboolean list_link_layer_types = FALSE;
817 gboolean start_capture = FALSE;
822 gboolean capture_option_specified = FALSE;
824 gboolean quiet = FALSE;
825 int out_file_type = WTAP_FILE_PCAP;
826 gboolean out_file_name_res = FALSE;
827 gchar *cf_name = NULL, *rfilter = NULL;
828 #ifdef HAVE_PCAP_OPEN_DEAD
829 struct bpf_program fcode;
831 dfilter_t *rfcode = NULL;
834 GLogLevelFlags log_flags;
836 gchar *output_only = NULL;
839 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
840 #define OPTSTRING_B "B:"
842 #define OPTSTRING_B ""
843 #endif /* _WIN32 or HAVE_PCAP_CREATE */
844 #else /* HAVE_LIBPCAP */
845 #define OPTSTRING_B ""
846 #endif /* HAVE_LIBPCAP */
848 #ifdef HAVE_PCAP_CREATE
849 #define OPTSTRING_I "I"
851 #define OPTSTRING_I ""
854 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:St:T:u:vVw:W:xX:y:z:"
856 static const char optstring[] = OPTSTRING;
859 /* Convert our arg list to UTF-8. */
860 wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
861 if (wc_argv && wc_argc == argc) {
862 for (i = 0; i < argc; i++) {
863 argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
865 } /* XXX else bail because something is horribly, horribly wrong? */
869 * Get credential information for later use.
871 init_process_policies();
874 * Attempt to get the pathname of the executable file.
876 init_progfile_dir_error = init_progfile_dir(argv[0], main);
877 if (init_progfile_dir_error != NULL) {
878 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
879 init_progfile_dir_error);
883 * In order to have the -X opts assigned before the wslua machine starts
884 * we need to call getopts before epan_init() gets called.
887 optind_initial = optind;
889 while ((opt = getopt(argc, argv, optstring)) != -1) {
891 case 'C': /* Configuration Profile */
892 if (profile_exists (optarg, FALSE)) {
893 set_profile_name (optarg);
895 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
907 optind = optind_initial;
912 /** Send All g_log messages to our own handler **/
916 G_LOG_LEVEL_CRITICAL|
921 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
923 g_log_set_handler(NULL,
925 tshark_log_handler, NULL /* user_data */);
926 g_log_set_handler(LOG_DOMAIN_MAIN,
928 tshark_log_handler, NULL /* user_data */);
931 g_log_set_handler(LOG_DOMAIN_CAPTURE,
933 tshark_log_handler, NULL /* user_data */);
934 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
936 tshark_log_handler, NULL /* user_data */);
939 initialize_funnel_ops();
942 capture_opts_init(&global_capture_opts, &cfile);
945 timestamp_set_type(TS_RELATIVE);
946 timestamp_set_precision(TS_PREC_AUTO);
947 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
949 /* Register all dissectors; we must do this before checking for the
950 "-G" flag, as the "-G" flag dumps information registered by the
951 dissectors, and we must do it before we read the preferences, in
952 case any dissectors register preferences. */
953 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
954 failure_message, open_failure_message, read_failure_message,
955 write_failure_message);
957 /* Register all tap listeners; we do this before we parse the arguments,
958 as the "-z" argument can specify a registered tap. */
960 /* we register the plugin taps before the other taps because
961 stats_tree taps plugins will be registered as tap listeners
962 by stats_tree_stat.c and need to registered before that */
964 register_all_plugin_tap_listeners();
966 register_all_tap_listeners();
968 /* Now register the preferences for any non-dissector modules.
969 We must do that before we read the preferences as well. */
970 prefs_register_modules();
972 /* If invoked with the "-G" flag, we dump out information based on
973 the argument to the "-G" flag; if no argument is specified,
974 for backwards compatibility we dump out a glossary of display
977 XXX - we do this here, for now, to support "-G" with no arguments.
978 If none of our build or other processes uses "-G" with no arguments,
979 we can just process it with the other arguments. */
980 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
981 proto_initialize_all_prefixes();
984 proto_registrar_dump_fields(1);
986 if (strcmp(argv[2], "fields") == 0)
987 proto_registrar_dump_fields(1);
988 else if (strcmp(argv[2], "fields2") == 0)
989 proto_registrar_dump_fields(2);
990 else if (strcmp(argv[2], "fields3") == 0)
991 proto_registrar_dump_fields(3);
992 else if (strcmp(argv[2], "protocols") == 0)
993 proto_registrar_dump_protocols();
994 else if (strcmp(argv[2], "values") == 0)
995 proto_registrar_dump_values();
996 else if (strcmp(argv[2], "decodes") == 0)
997 dissector_dump_decodes();
998 else if (strcmp(argv[2], "defaultprefs") == 0)
1000 else if (strcmp(argv[2], "?") == 0)
1001 glossary_option_help();
1002 else if (strcmp(argv[2], "-?") == 0)
1003 glossary_option_help();
1004 else if (strcmp(argv[2], "currentprefs") == 0) {
1005 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1006 &pf_open_errno, &pf_read_errno, &pf_path);
1009 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1016 /* Set the C-language locale to the native environment. */
1017 setlocale(LC_ALL, "");
1019 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1020 &pf_open_errno, &pf_read_errno, &pf_path);
1021 if (gpf_path != NULL) {
1022 if (gpf_open_errno != 0) {
1023 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1024 pf_path, strerror(gpf_open_errno));
1026 if (gpf_read_errno != 0) {
1027 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1028 pf_path, strerror(gpf_read_errno));
1031 if (pf_path != NULL) {
1032 if (pf_open_errno != 0) {
1033 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1034 strerror(pf_open_errno));
1036 if (pf_read_errno != 0) {
1037 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1038 pf_path, strerror(pf_read_errno));
1044 /* Set the name resolution code's flags from the preferences. */
1045 gbl_resolv_flags = prefs_p->name_resolve;
1047 /* Read the disabled protocols file. */
1048 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1049 &dp_path, &dp_open_errno, &dp_read_errno);
1050 if (gdp_path != NULL) {
1051 if (gdp_open_errno != 0) {
1052 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1053 gdp_path, strerror(gdp_open_errno));
1055 if (gdp_read_errno != 0) {
1056 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1057 gdp_path, strerror(gdp_read_errno));
1061 if (dp_path != NULL) {
1062 if (dp_open_errno != 0) {
1064 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1065 strerror(dp_open_errno));
1067 if (dp_read_errno != 0) {
1069 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1070 strerror(dp_read_errno));
1075 check_capture_privs();
1077 cap_file_init(&cfile);
1079 /* Print format defaults to this. */
1080 print_format = PR_FMT_TEXT;
1082 output_fields = output_fields_new();
1084 /* Now get our args */
1085 while ((opt = getopt(argc, argv, optstring)) != -1) {
1087 case 'a': /* autostop criteria */
1088 case 'b': /* Ringbuffer option */
1089 case 'c': /* Capture x packets */
1090 case 'f': /* capture filter */
1091 case 'i': /* Use interface x */
1092 case 'p': /* Don't capture in promiscuous mode */
1093 #ifdef HAVE_PCAP_CREATE
1094 case 'I': /* Capture in monitor mode, if available */
1096 case 's': /* Set the snapshot (capture) length */
1097 case 'w': /* Write to capture file x */
1098 case 'y': /* Set the pcap data link type */
1099 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1100 case 'B': /* Buffer size */
1101 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1103 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1108 capture_option_specified = TRUE;
1113 /* Configuration profile settings were already processed just ignore them this time*/
1115 case 'd': /* Decode as rule */
1116 if (!add_decode_as(optarg))
1119 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1120 case 'K': /* Kerberos keytab file */
1121 read_keytab_file(optarg);
1124 case 'D': /* Print a list of capture devices and exit */
1126 if_list = capture_interface_list(&err, &err_str);
1127 if (if_list == NULL) {
1129 case CANT_GET_INTERFACE_LIST:
1130 cmdarg_err("%s", err_str);
1134 case NO_INTERFACES_FOUND:
1135 cmdarg_err("There are no interfaces on which a capture can be done");
1140 capture_opts_print_interfaces(if_list);
1141 free_interface_list(if_list);
1144 capture_option_specified = TRUE;
1150 output_fields_add(output_fields, optarg);
1154 if(!output_fields_set_option(output_fields, optarg)) {
1155 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1156 output_fields_list_options(stderr);
1161 out_file_type = wtap_short_string_to_file_type(optarg);
1162 if (out_file_type < 0) {
1163 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1164 list_capture_types();
1168 case 'W': /* Select extra information to save in our capture file */
1169 /* This is patterned after the -N flag which may not be the best idea. */
1170 if (strchr(optarg, 'n'))
1171 out_file_name_res = TRUE;
1173 case 'H': /* Read address to name mappings from a hosts file */
1174 if (! read_hosts_file(optarg))
1176 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1179 out_file_name_res = TRUE;
1182 case 'h': /* Print help and exit */
1186 case 'l': /* "Line-buffer" standard output */
1187 /* This isn't line-buffering, strictly speaking, it's just
1188 flushing the standard output after the information for
1189 each packet is printed; however, that should be good
1190 enough for all the purposes to which "-l" is put (and
1191 is probably actually better for "-V", as it does fewer
1194 See the comment in "process_packet()" for an explanation of
1195 why we do that, and why we don't just use "setvbuf()" to
1196 make the standard output line-buffered (short version: in
1197 Windows, "line-buffered" is the same as "fully-buffered",
1198 and the output buffer is only flushed when it fills up). */
1199 line_buffered = TRUE;
1201 case 'L': /* Print list of link-layer types and exit */
1203 list_link_layer_types = TRUE;
1205 capture_option_specified = TRUE;
1209 case 'P': /* Perform two pass analysis */
1210 perform_two_pass_analysis = TRUE;
1212 case 'n': /* No name resolution */
1213 gbl_resolv_flags = RESOLV_NONE;
1215 case 'N': /* Select what types of addresses/port #s to resolve */
1216 if (gbl_resolv_flags == RESOLV_ALL)
1217 gbl_resolv_flags = RESOLV_NONE;
1218 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1219 if (badopt != '\0') {
1220 cmdarg_err("-N specifies unknown resolving option '%c';",
1222 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1226 case 'o': /* Override preference from command line */
1227 switch (prefs_set_pref(optarg)) {
1232 case PREFS_SET_SYNTAX_ERR:
1233 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1237 case PREFS_SET_NO_SUCH_PREF:
1238 case PREFS_SET_OBSOLETE:
1239 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1244 case 'O': /* Only output these protocols */
1245 output_only = g_strdup(optarg);
1247 case 'q': /* Quiet */
1250 case 'r': /* Read capture file x */
1251 cf_name = g_strdup(optarg);
1253 case 'R': /* Read file filter */
1256 case 'S': /* show packets in real time */
1257 print_packet_info = TRUE;
1259 case 't': /* Time stamp type */
1260 if (strcmp(optarg, "r") == 0)
1261 timestamp_set_type(TS_RELATIVE);
1262 else if (strcmp(optarg, "a") == 0)
1263 timestamp_set_type(TS_ABSOLUTE);
1264 else if (strcmp(optarg, "ad") == 0)
1265 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1266 else if (strcmp(optarg, "d") == 0)
1267 timestamp_set_type(TS_DELTA);
1268 else if (strcmp(optarg, "dd") == 0)
1269 timestamp_set_type(TS_DELTA_DIS);
1270 else if (strcmp(optarg, "e") == 0)
1271 timestamp_set_type(TS_EPOCH);
1273 cmdarg_err("Invalid time stamp type \"%s\"",
1275 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1276 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1280 case 'T': /* printing Type */
1281 if (strcmp(optarg, "text") == 0) {
1282 output_action = WRITE_TEXT;
1283 print_format = PR_FMT_TEXT;
1284 } else if (strcmp(optarg, "ps") == 0) {
1285 output_action = WRITE_TEXT;
1286 print_format = PR_FMT_PS;
1287 } else if (strcmp(optarg, "pdml") == 0) {
1288 output_action = WRITE_XML;
1290 } else if (strcmp(optarg, "psml") == 0) {
1291 output_action = WRITE_XML;
1293 } else if(strcmp(optarg, "fields") == 0) {
1294 output_action = WRITE_FIELDS;
1295 verbose = TRUE; /* Need full tree info */
1297 cmdarg_err("Invalid -T parameter.");
1298 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1302 case 'u': /* Seconds type */
1303 if (strcmp(optarg, "s") == 0)
1304 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1305 else if (strcmp(optarg, "hms") == 0)
1306 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1308 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1309 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1313 case 'v': /* Show version and exit */
1315 GString *comp_info_str;
1316 GString *runtime_info_str;
1317 /* Assemble the compile-time version information string */
1318 comp_info_str = g_string_new("Compiled ");
1319 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1321 /* Assemble the run-time version information string */
1322 runtime_info_str = g_string_new("Running ");
1323 get_runtime_version_info(runtime_info_str, NULL);
1324 show_version(comp_info_str, runtime_info_str);
1325 g_string_free(comp_info_str, TRUE);
1326 g_string_free(runtime_info_str, TRUE);
1330 case 'V': /* Verbose */
1332 /* The user asked for a verbose output, so let's ensure they get it,
1333 * even if they're writing to a file.
1335 print_packet_info = TRUE;
1337 case 'x': /* Print packet data in hex (and ASCII) */
1339 /* The user asked for hex output, so let's ensure they get it,
1340 * even if they're writing to a file.
1342 print_packet_info = TRUE;
1347 /* We won't call the init function for the stat this soon
1348 as it would disallow MATE's fields (which are registered
1349 by the preferences set callback) from being used as
1350 part of a tap filter. Instead, we just add the argument
1351 to a list of stat arguments. */
1352 if (!process_stat_cmd_arg(optarg)) {
1353 cmdarg_err("invalid -z argument.");
1354 cmdarg_err_cont(" -z argument must be one of :");
1355 list_stat_cmd_args();
1360 case '?': /* Bad flag - print usage message */
1363 list_capture_types();
1373 /* If we specified output fields, but not the output field type... */
1374 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1375 cmdarg_err("Output fields were specified with \"-e\", "
1376 "but \"-Tfields\" was not specified.");
1378 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1379 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1380 "specified with \"-e\".");
1385 /* If no capture filter or read filter has been specified, and there are
1386 still command-line arguments, treat them as the tokens of a capture
1387 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1388 flag was specified. */
1389 if (optind < argc) {
1390 if (cf_name != NULL) {
1391 if (rfilter != NULL) {
1392 cmdarg_err("Read filters were specified both with \"-R\" "
1393 "and with additional command-line arguments");
1396 rfilter = get_args_as_string(argc, argv, optind);
1399 if (global_capture_opts.has_cfilter) {
1400 cmdarg_err("Capture filters were specified both with \"-f\""
1401 " and with additional command-line arguments");
1404 global_capture_opts.has_cfilter = TRUE;
1405 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1407 capture_option_specified = TRUE;
1413 if (!global_capture_opts.saving_to_file) {
1414 /* We're not saving the capture to a file; if "-q" wasn't specified,
1415 we should print packet information */
1417 print_packet_info = TRUE;
1419 /* We're saving to a file; if we're writing to the standard output.
1420 and we'll also be writing dissected packets to the standard
1421 output, reject the request. At best, we could redirect that
1422 to the standard error; we *can't* write both to the standard
1423 output and have either of them be useful. */
1424 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1425 cmdarg_err("You can't write both raw packet data and dissected packets"
1426 " to the standard output.");
1431 /* We're not saving the capture to a file; if "-q" wasn't specified,
1432 we should print packet information */
1434 print_packet_info = TRUE;
1437 #ifndef HAVE_LIBPCAP
1438 if (capture_option_specified)
1439 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1446 /* We don't support capture filters when reading from a capture file
1447 (the BPF compiler doesn't support all link-layer types that we
1448 support in capture files we read). */
1450 if (cf_name != NULL) {
1451 if (global_capture_opts.has_cfilter) {
1452 cmdarg_err("Only read filters, not capture filters, "
1453 "can be specified when reading a capture file.");
1460 if (output_action != WRITE_TEXT) {
1461 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1466 if (output_only != NULL) {
1470 cmdarg_err("-O requires -V");
1474 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1475 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1476 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1481 if (list_link_layer_types) {
1482 /* We're supposed to list the link-layer types for an interface;
1483 did the user also specify a capture file to be read? */
1485 /* Yes - that's bogus. */
1486 cmdarg_err("You can't specify -L and a capture file to be read.");
1489 /* No - did they specify a ring buffer option? */
1490 if (global_capture_opts.multi_files_on) {
1491 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1497 * "-r" was specified, so we're reading a capture file.
1498 * Capture options don't apply here.
1500 if (global_capture_opts.multi_files_on) {
1501 cmdarg_err("Multiple capture files requested, but "
1502 "a capture isn't being done.");
1505 if (global_capture_opts.has_file_duration) {
1506 cmdarg_err("Switching capture files after a time interval was specified, but "
1507 "a capture isn't being done.");
1510 if (global_capture_opts.has_ring_num_files) {
1511 cmdarg_err("A ring buffer of capture files was specified, but "
1512 "a capture isn't being done.");
1515 if (global_capture_opts.has_autostop_files) {
1516 cmdarg_err("A maximum number of capture files was specified, but "
1517 "a capture isn't being done.");
1521 /* Note: TShark now allows the restriction of a _read_ file by packet count
1522 * and byte count as well as a write file. Other autostop options remain valid
1523 * only for a write file.
1525 if (global_capture_opts.has_autostop_duration) {
1526 cmdarg_err("A maximum capture time was specified, but "
1527 "a capture isn't being done.");
1532 * "-r" wasn't specified, so we're doing a live capture.
1534 if (global_capture_opts.saving_to_file) {
1535 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1537 /* When capturing, we only support writing libpcap format. */
1538 if (out_file_type != WTAP_FILE_PCAP) {
1539 cmdarg_err("Live captures can only be saved in libpcap format.");
1542 if (global_capture_opts.multi_files_on) {
1543 /* Multiple-file mode doesn't work under certain conditions:
1544 a) it doesn't work if you're writing to the standard output;
1545 b) it doesn't work if you're writing to a pipe;
1547 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1548 cmdarg_err("Multiple capture files requested, but "
1549 "the capture is being written to the standard output.");
1552 if (global_capture_opts.output_to_pipe) {
1553 cmdarg_err("Multiple capture files requested, but "
1554 "the capture file is a pipe.");
1557 if (!global_capture_opts.has_autostop_filesize &&
1558 !global_capture_opts.has_file_duration) {
1559 cmdarg_err("Multiple capture files requested, but "
1560 "no maximum capture file size or duration was specified.");
1564 /* Currently, we don't support read filters when capturing
1565 and saving the packets. */
1566 if (rfilter != NULL) {
1567 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1571 /* They didn't specify a "-w" flag, so we won't be saving to a
1572 capture file. Check for options that only make sense if
1573 we're saving to a file. */
1574 if (global_capture_opts.has_autostop_filesize) {
1575 cmdarg_err("Maximum capture file size specified, but "
1576 "capture isn't being saved to a file.");
1579 if (global_capture_opts.multi_files_on) {
1580 cmdarg_err("Multiple capture files requested, but "
1581 "the capture isn't being saved to a file.");
1590 /* Start windows sockets */
1591 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1594 /* Notify all registered modules that have had any of their preferences
1595 changed either from one of the preferences file or from the command
1596 line that their preferences have changed. */
1599 /* At this point MATE will have registered its field array so we can
1600 have a tap filter with one of MATE's late-registered fields as part
1601 of the filter. We can now process all the "-z" arguments. */
1602 start_requested_stats();
1605 /* We currently don't support taps, or printing dissected packets,
1606 if we're writing to a pipe. */
1607 if (global_capture_opts.saving_to_file &&
1608 global_capture_opts.output_to_pipe) {
1609 if (tap_listeners_require_dissection()) {
1610 cmdarg_err("Taps aren't supported when saving to a pipe.");
1613 if (print_packet_info) {
1614 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1620 /* disabled protocols as per configuration file */
1621 if (gdp_path == NULL && dp_path == NULL) {
1622 set_disabled_protos_list();
1625 /* Build the column format array */
1626 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1629 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1630 capture_opts_trim_ring_num_files(&global_capture_opts);
1633 if (rfilter != NULL) {
1634 if (!dfilter_compile(rfilter, &rfcode)) {
1635 cmdarg_err("%s", dfilter_error_msg);
1637 #ifdef HAVE_PCAP_OPEN_DEAD
1641 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1643 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1645 " Note: That display filter code looks like a valid capture filter;");
1647 " maybe you mixed them up?");
1656 cfile.rfcode = rfcode;
1658 if (print_packet_info) {
1659 /* If we're printing as text or PostScript, we have
1660 to create a print stream. */
1661 if (output_action == WRITE_TEXT) {
1662 switch (print_format) {
1665 print_stream = print_stream_text_stdio_new(stdout);
1669 print_stream = print_stream_ps_stdio_new(stdout);
1673 g_assert_not_reached();
1678 /* We have to dissect each packet if:
1680 we're printing information about each packet;
1682 we're using a read filter on the packets;
1684 we're using any taps that need dissection. */
1685 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1689 * We're reading a capture file.
1693 * Immediately relinquish any special privileges we have; we must not
1694 * be allowed to read any capture files the user running TShark
1697 relinquish_special_privs_perm();
1698 print_current_user();
1700 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1705 /* Set timestamp precision; there should arguably be a command-line
1706 option to let the user set this. */
1707 switch(wtap_file_tsprecision(cfile.wth)) {
1708 case(WTAP_FILE_TSPREC_SEC):
1709 timestamp_set_precision(TS_PREC_AUTO_SEC);
1711 case(WTAP_FILE_TSPREC_DSEC):
1712 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1714 case(WTAP_FILE_TSPREC_CSEC):
1715 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1717 case(WTAP_FILE_TSPREC_MSEC):
1718 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1720 case(WTAP_FILE_TSPREC_USEC):
1721 timestamp_set_precision(TS_PREC_AUTO_USEC);
1723 case(WTAP_FILE_TSPREC_NSEC):
1724 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1727 g_assert_not_reached();
1730 /* Process the packets in the file */
1732 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1733 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1734 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1736 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1739 /* We still dump out the results of taps, etc., as we might have
1740 read some packets; however, we exit with an error status. */
1744 /* No capture file specified, so we're supposed to do a live capture
1745 (or get a list of link-layer types for a live capture device);
1746 do we have support for live captures? */
1753 cmdarg_err("WinPcap couldn't be found.");
1754 detailed_err = cant_load_winpcap_err("TShark");
1755 cmdarg_err_cont("%s", detailed_err);
1756 g_free(detailed_err);
1761 /* trim the interface name and exit if that failed */
1762 if (!capture_opts_trim_iface(&global_capture_opts,
1763 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1767 /* if requested, list the link layer types and exit */
1768 if (list_link_layer_types) {
1770 interface_options interface_opts;
1772 /* Get the list of link-layer types for the capture devices. */
1773 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1774 if_capabilities_t *caps;
1776 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1777 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1779 cmdarg_err("%s", err_str);
1783 if (caps->data_link_types == NULL) {
1784 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1787 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1788 free_if_capabilities(caps);
1793 if (print_packet_info) {
1794 if (!write_preamble(NULL)) {
1795 show_print_file_io_error(errno);
1798 } else if (!quiet) {
1800 * We're not printing information for each packet, and the user
1801 * didn't ask us not to print a count of packets as they arrive,
1802 * so print that count so the user knows that packets are arriving.
1804 * XXX - what if the user wants to do a live capture, doesn't want
1805 * to save it to a file, doesn't want information printed for each
1806 * packet, does want some "-z" statistic, and wants packet counts
1807 * so they know whether they're seeing any packets?
1809 print_packet_counts = TRUE;
1812 /* For now, assume libpcap gives microsecond precision. */
1813 timestamp_set_precision(TS_PREC_AUTO_USEC);
1816 * XXX - this returns FALSE if an error occurred, but it also
1817 * returns FALSE if the capture stops because a time limit
1818 * was reached (and possibly other limits), so we can't assume
1819 * it means an error.
1821 * The capture code is a bit twisty, so it doesn't appear to
1822 * be an easy fix. We just ignore the return value for now.
1823 * Instead, pass on the exit status from the capture child.
1826 exit_status = global_capture_opts.fork_child_status;
1828 if (print_packet_info) {
1829 if (!write_finale()) {
1831 show_print_file_io_error(err);
1835 /* No - complain. */
1836 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1843 if (cfile.frames != NULL) {
1844 free_frame_data_sequence(cfile.frames);
1845 cfile.frames = NULL;
1848 draw_tap_listeners(TRUE);
1849 funnel_dump_all_text_windows();
1852 output_fields_free(output_fields);
1853 output_fields = NULL;
1858 /*#define USE_BROKEN_G_MAIN_LOOP*/
1860 #ifdef USE_BROKEN_G_MAIN_LOOP
1863 gboolean loop_running = FALSE;
1865 guint32 packet_count = 0;
1868 /* XXX - move to the right position / file */
1869 /* read from a pipe (callback) */
1870 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1872 typedef struct pipe_input_tag {
1876 pipe_input_cb_t input_cb;
1877 guint pipe_input_id;
1879 GStaticMutex callback_running;
1883 static pipe_input_t pipe_input;
1886 /* The timer has expired, see if there's stuff to read from the pipe,
1887 if so, do the callback */
1889 pipe_timer_cb(gpointer data)
1893 gboolean result, result1;
1895 pipe_input_t *pipe_input_p = data;
1896 gint iterations = 0;
1899 g_static_mutex_lock (&pipe_input_p->callback_running);
1901 /* try to read data from the pipe only 5 times, to avoid blocking */
1902 while(iterations < 5) {
1903 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1905 /* Oddly enough although Named pipes don't work on win9x,
1906 PeekNamedPipe does !!! */
1907 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
1908 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1910 /* Get the child process exit status */
1911 result1 = GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
1914 /* If the Peek returned an error, or there are bytes to be read
1915 or the childwatcher thread has terminated then call the normal
1917 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1919 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1921 /* And call the real handler */
1922 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
1923 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1924 /* pipe closed, return false so that the timer is stopped */
1925 g_static_mutex_unlock (&pipe_input_p->callback_running);
1930 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1931 /* No data, stop now */
1938 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1940 g_static_mutex_unlock (&pipe_input_p->callback_running);
1942 /* we didn't stopped the timer, so let it run */
1949 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1952 pipe_input.source = source;
1953 pipe_input.child_process = child_process;
1954 pipe_input.user_data = user_data;
1955 pipe_input.input_cb = input_cb;
1958 g_static_mutex_init(&pipe_input.callback_running);
1959 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1960 do this but that doesn't cover all win32 platforms. GTK can do
1961 this but doesn't seem to work over processes. Attempt to do
1962 something similar here, start a timer and check for data on every
1964 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1965 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1976 GString *str = g_string_new("");
1977 #ifdef USE_TSHARK_SELECT
1981 struct sigaction action, oldaction;
1985 * XXX - dropping privileges is still required, until code cleanup is done
1987 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1988 * when it's done, we don't need special privileges to run tshark at all,
1989 * therefore we don't need to drop these privileges
1990 * The only thing we might want to keep is a warning if tshark is run as root,
1991 * as it's no longer necessary and potentially dangerous.
1993 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1994 * We've opened the capture device, so we shouldn't need any special
1995 * privileges any more; relinquish those privileges.
1997 * XXX - if we have saved set-user-ID support, we should give up those
1998 * privileges immediately, and then reclaim them long enough to get
1999 * a list of network interfaces and to open one, and then give them
2000 * up again, so that stuff we do while processing the argument list,
2001 * reading the user's preferences, loading and starting plugins
2002 * (especially *user* plugins), etc. is done with the user's privileges,
2003 * not special privileges.
2005 relinquish_special_privs_perm();
2006 print_current_user();
2008 /* Cleanup all data structures used for dissection. */
2009 cleanup_dissection();
2010 /* Initialize all data structures used for dissection. */
2014 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2015 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2017 /* Catch SIGINT and SIGTERM and, if we get either of them,
2018 clean up and exit. If SIGHUP isn't being ignored, catch
2019 it too and, if we get it, clean up and exit.
2021 We restart any read that was in progress, so that it doesn't
2022 disrupt reading from the sync pipe. The signal handler tells
2023 the capture child to finish; it will report that it finished,
2024 or will exit abnormally, so we'll stop reading from the sync
2025 pipe, pick up the exit status, and quit. */
2026 action.sa_handler = capture_cleanup;
2027 action.sa_flags = SA_RESTART;
2028 sigemptyset(&action.sa_mask);
2029 sigaction(SIGTERM, &action, NULL);
2030 sigaction(SIGINT, &action, NULL);
2031 sigaction(SIGHUP, NULL, &oldaction);
2032 if (oldaction.sa_handler == SIG_DFL)
2033 sigaction(SIGHUP, &action, NULL);
2036 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2037 quiet mode, report the number of packets we've captured.
2039 Again, restart any read that was in progress, so that it doesn't
2040 disrupt reading from the sync pipe. */
2041 action.sa_handler = report_counts_siginfo;
2042 action.sa_flags = SA_RESTART;
2043 sigemptyset(&action.sa_mask);
2044 sigaction(SIGINFO, &action, NULL);
2045 #endif /* SIGINFO */
2048 global_capture_opts.state = CAPTURE_PREPARING;
2050 /* Let the user know which interfaces were chosen. */
2051 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2052 interface_options interface_opts;
2054 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2055 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2056 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2057 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2060 if (global_capture_opts.ifaces->len < 2) {
2062 if (global_capture_opts.ifaces->len < 4) {
2064 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2065 interface_options interface_opts;
2067 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2069 if (global_capture_opts.ifaces->len > 2) {
2070 g_string_append_printf(str, ",");
2072 g_string_append_printf(str, " ");
2073 if (i == global_capture_opts.ifaces->len - 1) {
2074 g_string_append_printf(str, "and ");
2077 g_string_append_printf(str, "%s", interface_opts.descr);
2080 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2082 fprintf(stderr, "Capturing on %s\n", str->str);
2083 g_string_free(str, TRUE);
2085 ret = sync_pipe_start(&global_capture_opts);
2090 /* the actual capture loop
2092 * XXX - glib doesn't seem to provide any event based loop handling.
2094 * XXX - for whatever reason,
2095 * calling g_main_loop_new() ends up in 100% cpu load.
2097 * But that doesn't matter: in UNIX we can use select() to find an input
2098 * source with something to do.
2100 * But that doesn't matter because we're in a CLI (that doesn't need to
2101 * update a GUI or something at the same time) so it's OK if we block
2102 * trying to read from the pipe.
2104 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2105 * wrong (but I leave it there in case I am...).
2108 #ifdef USE_TSHARK_SELECT
2110 FD_SET(pipe_input.source, &readfds);
2113 loop_running = TRUE;
2115 while (loop_running)
2117 #ifdef USE_TSHARK_SELECT
2118 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2124 } else if (ret == 1) {
2126 /* Call the real handler */
2127 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2128 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2131 #ifdef USE_TSHARK_SELECT
2140 /* XXX - move the call to main_window_update() out of capture_sync.c */
2141 /* dummy for capture_sync.c to make linker happy */
2142 void main_window_update(void)
2146 /* capture child detected an error */
2148 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2150 cmdarg_err("%s", error_msg);
2151 cmdarg_err_cont("%s", secondary_error_msg);
2155 /* capture child detected an capture filter related error */
2157 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
2159 dfilter_t *rfcode = NULL;
2162 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
2164 "Invalid capture filter: \"%s\"!\n"
2166 "That string looks like a valid display filter; however, it isn't a valid\n"
2167 "capture filter (%s).\n"
2169 "Note that display filters and capture filters don't have the same syntax,\n"
2170 "so you can't use most display filter expressions as capture filters.\n"
2172 "See the User's Guide for a description of the capture filter syntax.",
2173 capture_opts->cfilter, error_message);
2174 dfilter_free(rfcode);
2177 "Invalid capture filter: \"%s\"!\n"
2179 "That string isn't a valid capture filter (%s).\n"
2180 "See the User's Guide for a description of the capture filter syntax.",
2181 capture_opts->cfilter, error_message);
2186 /* capture child tells us we have a new (or the first) capture file */
2188 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2190 gboolean is_tempfile;
2193 if(capture_opts->state == CAPTURE_PREPARING) {
2194 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2196 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2198 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2200 /* free the old filename */
2201 if (capture_opts->save_file != NULL) {
2203 /* we start a new capture file, close the old one (if we had one before) */
2204 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2205 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2206 wtap_close(((capture_file *) capture_opts->cf)->wth);
2208 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2211 g_free(capture_opts->save_file);
2212 is_tempfile = FALSE;
2214 /* we didn't had a save_file before, must be a tempfile */
2218 /* save the new filename */
2219 capture_opts->save_file = g_strdup(new_file);
2221 /* if we are in real-time mode, open the new file now */
2223 /* Attempt to open the capture file and set up to read from it. */
2224 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2228 /* Don't unlink (delete) the save file - leave it around,
2229 for debugging purposes. */
2230 g_free(capture_opts->save_file);
2231 capture_opts->save_file = NULL;
2236 capture_opts->state = CAPTURE_RUNNING;
2242 /* capture child tells us we have new packets to read */
2244 capture_input_new_packets(capture_options *capture_opts, int to_read)
2250 capture_file *cf = capture_opts->cf;
2251 gboolean filtering_tap_listeners;
2256 * Prevent a SIGINFO handler from writing to the standard error while
2257 * we're doing so or writing to the standard output; instead, have it
2258 * just set a flag telling us to print that information when we're done.
2261 #endif /* SIGINFO */
2263 /* Do we have any tap listeners with filters? */
2264 filtering_tap_listeners = have_filtering_tap_listeners();
2266 /* Get the union of the flags for all tap listeners. */
2267 tap_flags = union_of_tap_listener_flags();
2270 while (to_read-- && cf->wth) {
2271 wtap_cleareof(cf->wth);
2272 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2274 /* read from file failed, tell the capture child to stop */
2275 sync_pipe_stop(capture_opts);
2276 wtap_close(cf->wth);
2279 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2280 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2281 filtering_tap_listeners, tap_flags);
2284 /* packet successfully read and gone through the "Read Filter" */
2290 * Dumpcap's doing all the work; we're not doing any dissection.
2291 * Count all the packets it wrote.
2293 packet_count += to_read;
2296 if (print_packet_counts) {
2297 /* We're printing packet counts. */
2298 if (packet_count != 0) {
2299 fprintf(stderr, "\r%u ", packet_count);
2300 /* stderr could be line buffered */
2307 * Allow SIGINFO handlers to write.
2312 * If a SIGINFO handler asked us to write out capture counts, do so.
2316 #endif /* SIGINFO */
2322 if (!print_packet_counts) {
2323 /* Report the count only if we aren't printing a packet count
2324 as packets arrive. */
2325 fprintf(stderr, "%u packet%s captured\n", packet_count,
2326 plurality(packet_count, "", "s"));
2329 infoprint = FALSE; /* we just reported it */
2330 #endif /* SIGINFO */
2335 report_counts_siginfo(int signum _U_)
2337 int sav_errno = errno;
2338 /* If we've been told to delay printing, just set a flag asking
2339 that we print counts (if we're supposed to), otherwise print
2340 the count of packets captured (if we're supposed to). */
2347 #endif /* SIGINFO */
2350 /* capture child detected any packet drops? */
2352 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2354 if (print_packet_counts) {
2355 /* We're printing packet counts to stderr.
2356 Send a newline so that we move to the line after the packet count. */
2357 fprintf(stderr, "\n");
2361 /* We're printing packet counts to stderr.
2362 Send a newline so that we move to the line after the packet count. */
2363 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2369 * Capture child closed its side of the pipe, report any error and
2370 * do the required cleanup.
2373 capture_input_closed(capture_options *capture_opts, gchar *msg)
2376 fprintf(stderr, "tshark: %s\n", msg);
2380 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2381 wtap_close(((capture_file *) capture_opts->cf)->wth);
2382 if(((capture_file *) capture_opts->cf)->user_saved == FALSE) {
2383 ws_unlink(((capture_file *) capture_opts->cf)->filename);
2386 #ifdef USE_BROKEN_G_MAIN_LOOP
2387 /*g_main_loop_quit(loop);*/
2390 loop_running = FALSE;
2399 capture_cleanup(DWORD ctrltype _U_)
2401 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2402 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2403 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2404 like SIGTERM at least when the machine's shutting down.
2406 For now, we handle them all as indications that we should clean up
2407 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2410 We must return TRUE so that no other handler - such as one that would
2411 terminate the process - gets called.
2413 XXX - for some reason, typing ^C to TShark, if you run this in
2414 a Cygwin console window in at least some versions of Cygwin,
2415 causes TShark to terminate immediately; this routine gets
2416 called, but the main loop doesn't get a chance to run and
2417 exit cleanly, at least if this is compiled with Microsoft Visual
2418 C++ (i.e., it's a property of the Cygwin console window or Bash;
2419 it happens if TShark is not built with Cygwin - for all I know,
2420 building it with Cygwin may make the problem go away). */
2422 /* tell the capture child to stop */
2423 sync_pipe_stop(&global_capture_opts);
2425 /* don't stop our own loop already here, otherwise status messages and
2426 * cleanup wouldn't be done properly. The child will indicate the stop of
2427 * everything by calling capture_input_closed() later */
2433 capture_cleanup(int signum _U_)
2435 /* tell the capture child to stop */
2436 sync_pipe_stop(&global_capture_opts);
2438 /* don't stop our own loop already here, otherwise status messages and
2439 * cleanup wouldn't be done properly. The child will indicate the stop of
2440 * everything by calling capture_input_closed() later */
2443 #endif /* HAVE_LIBPCAP */
2446 process_packet_first_pass(capture_file *cf,
2447 gint64 offset, const struct wtap_pkthdr *whdr,
2448 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2455 /* The frame number of this packet is one more than the count of
2456 frames in this packet. */
2457 framenum = cf->count + 1;
2459 /* If we're not running a display filter and we're not printing any
2460 packet information, we don't need to do a dissection. This means
2461 that all packets can be marked as 'passed'. */
2464 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2466 /* If we're going to print packet information, or we're going to
2467 run a read filter, or we're going to process taps, set up to
2468 do a dissection and do so. */
2469 if (do_dissection) {
2470 if (gbl_resolv_flags)
2471 /* Grab any resolved addresses */
2472 host_name_lookup_process(NULL);
2474 /* The protocol tree will be "visible", i.e., printed, only if we're
2475 printing packet details, which is true if we're printing stuff
2476 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2478 epan_dissect_init(&edt, FALSE, FALSE);
2480 /* If we're running a read filter, prime the epan_dissect_t with that
2483 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2485 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2486 &first_ts, &prev_dis_ts, &prev_cap_ts);
2488 epan_dissect_run(&edt, pseudo_header, pd, &fdlocal, NULL);
2490 /* Run the read filter if we have one. */
2492 passed = dfilter_apply_edt(cf->rfcode, &edt);
2496 frame_data_set_after_dissect(&fdlocal, &cum_bytes, &prev_dis_ts);
2497 frame_data_sequence_add(cf->frames, &fdlocal);
2502 epan_dissect_cleanup(&edt);
2508 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2509 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2510 gboolean filtering_tap_listeners, guint tap_flags)
2512 gboolean create_proto_tree;
2517 /* If we're not running a display filter and we're not printing any
2518 packet information, we don't need to do a dissection. This means
2519 that all packets can be marked as 'passed'. */
2522 /* If we're going to print packet information, or we're going to
2523 run a read filter, or we're going to process taps, set up to
2524 do a dissection and do so. */
2525 if (do_dissection) {
2526 if (gbl_resolv_flags)
2527 /* Grab any resolved addresses */
2528 host_name_lookup_process(NULL);
2530 if (cf->rfcode || verbose || filtering_tap_listeners ||
2531 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2532 create_proto_tree = TRUE;
2534 create_proto_tree = FALSE;
2536 /* The protocol tree will be "visible", i.e., printed, only if we're
2537 printing packet details, which is true if we're printing stuff
2538 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2540 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2542 /* If we're running a read filter, prime the epan_dissect_t with that
2545 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2547 col_custom_prime_edt(&edt, &cf->cinfo);
2549 tap_queue_init(&edt);
2551 /* We only need the columns if either
2553 1) some tap needs the columns
2557 2) we're printing packet info but we're *not* verbose; in verbose
2558 mode, we print the protocol tree, not the protocol summary. */
2559 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2564 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2566 tap_push_tapped_queue(&edt);
2568 /* Run the read filter if we have one. */
2570 passed = dfilter_apply_edt(cf->rfcode, &edt);
2574 /* Process this packet. */
2575 if (print_packet_info) {
2576 /* We're printing packet information; print the information for
2579 print_packet(cf, &edt);
2581 print_packet(cf, NULL);
2583 /* The ANSI C standard does not appear to *require* that a line-buffered
2584 stream be flushed to the host environment whenever a newline is
2585 written, it just says that, on such a stream, characters "are
2586 intended to be transmitted to or from the host environment as a
2587 block when a new-line character is encountered".
2589 The Visual C++ 6.0 C implementation doesn't do what is intended;
2590 even if you set a stream to be line-buffered, it still doesn't
2591 flush the buffer at the end of every line.
2593 So, if the "-l" flag was specified, we flush the standard output
2594 at the end of a packet. This will do the right thing if we're
2595 printing packet summary lines, and, as we print the entire protocol
2596 tree for a single packet without waiting for anything to happen,
2597 it should be as good as line-buffered mode if we're printing
2598 protocol trees. (The whole reason for the "-l" flag in either
2599 tcpdump or TShark is to allow the output of a live capture to
2600 be piped to a program or script and to have that script see the
2601 information for the packet as soon as it's printed, rather than
2602 having to wait until a standard I/O buffer fills up. */
2606 if (ferror(stdout)) {
2607 show_print_file_io_error(errno);
2613 if (do_dissection) {
2614 epan_dissect_cleanup(&edt);
2620 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2621 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2624 int snapshot_length;
2627 gchar *err_info = NULL;
2629 char *save_file_string = NULL;
2630 gboolean filtering_tap_listeners;
2633 linktype = wtap_file_encap(cf->wth);
2634 if (save_file != NULL) {
2635 /* Get a string that describes what we're writing to */
2636 save_file_string = output_file_description(save_file);
2638 /* Set up to write to the capture file. */
2639 snapshot_length = wtap_snapshot_length(cf->wth);
2640 if (snapshot_length == 0) {
2641 /* Snapshot length of input file not known. */
2642 snapshot_length = WTAP_MAX_PACKET_SIZE;
2644 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2645 FALSE /* compressed */, &err);
2648 /* We couldn't set up to write to the capture file. */
2651 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2652 cmdarg_err("Capture files can't be written in that format.");
2655 case WTAP_ERR_UNSUPPORTED_ENCAP:
2656 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2657 cmdarg_err("The capture file being read can't be written in "
2661 case WTAP_ERR_CANT_OPEN:
2662 cmdarg_err("The %s couldn't be created for some "
2663 "unknown reason.", save_file_string);
2666 case WTAP_ERR_SHORT_WRITE:
2667 cmdarg_err("A full header couldn't be written to the %s.",
2672 cmdarg_err("The %s could not be created: %s.", save_file_string,
2673 wtap_strerror(err));
2679 if (print_packet_info) {
2680 if (!write_preamble(cf)) {
2682 show_print_file_io_error(err);
2689 if (pdh && out_file_name_res) {
2690 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2691 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2692 wtap_file_type_short_string(out_file_type));
2696 /* Do we have any tap listeners with filters? */
2697 filtering_tap_listeners = have_filtering_tap_listeners();
2699 /* Get the union of the flags for all tap listeners. */
2700 tap_flags = union_of_tap_listener_flags();
2702 if (perform_two_pass_analysis) {
2705 int old_max_packet_count = max_packet_count;
2707 /* Allocate a frame_data_sequence for all the frames. */
2708 cf->frames = new_frame_data_sequence();
2710 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2711 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2712 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2713 /* Stop reading if we have the maximum number of packets;
2714 * When the -c option has not been used, max_packet_count
2715 * starts at 0, which practically means, never stop reading.
2716 * (unless we roll over max_packet_count ?)
2718 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2719 err = 0; /* This is not an error */
2725 /* Close the sequential I/O side, to free up memory it requires. */
2726 wtap_sequential_close(cf->wth);
2728 /* Allow the protocol dissectors to free up memory that they
2729 * don't need after the sequential run-through of the packets. */
2730 postseq_cleanup_all_protocols();
2732 max_packet_count = old_max_packet_count;
2734 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2735 fdata = frame_data_sequence_find(cf->frames, framenum);
2736 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2737 cf->pd, fdata->cap_len, &err, &err_info)) {
2738 if (process_packet_second_pass(cf, fdata,
2739 &cf->pseudo_header, cf->pd,
2740 filtering_tap_listeners, tap_flags)) {
2741 /* Either there's no read filtering or this packet passed the
2742 filter, so, if we're writing to a capture file, write
2745 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2746 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2748 /* Error writing to a capture file */
2749 show_capture_file_io_error(save_file, err, FALSE);
2750 wtap_dump_close(pdh, &err);
2754 /* Stop reading if we have the maximum number of packets;
2755 * When the -c option has not been used, max_packet_count
2756 * starts at 0, which practically means, never stop reading.
2757 * (unless we roll over max_packet_count ?)
2759 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2760 err = 0; /* This is not an error */
2768 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2769 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2770 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2771 filtering_tap_listeners, tap_flags)) {
2772 /* Either there's no read filtering or this packet passed the
2773 filter, so, if we're writing to a capture file, write
2776 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2777 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2779 /* Error writing to a capture file */
2780 show_capture_file_io_error(save_file, err, FALSE);
2781 wtap_dump_close(pdh, &err);
2785 /* Stop reading if we have the maximum number of packets;
2786 * When the -c option has not been used, max_packet_count
2787 * starts at 0, which practically means, never stop reading.
2788 * (unless we roll over max_packet_count ?)
2790 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2791 err = 0; /* This is not an error */
2800 * Print a message noting that the read failed somewhere along the line.
2802 * If we're printing packet data, and the standard output and error are
2803 * going to the same place, flush the standard output, so everything
2804 * buffered up is written, and then print a newline to the standard error
2805 * before printing the error message, to separate it from the packet
2806 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
2807 * the _fstat() documentation at Microsoft doesn't indicate whether
2808 * st_ino is even supported.)
2811 if (print_packet_info) {
2812 struct stat stat_stdout, stat_stderr;
2814 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
2815 if (stat_stdout.st_dev == stat_stderr.st_dev &&
2816 stat_stdout.st_ino == stat_stderr.st_ino) {
2818 fprintf(stderr, "\n");
2825 case WTAP_ERR_UNSUPPORTED_ENCAP:
2826 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2827 cf->filename, err_info);
2831 case WTAP_ERR_CANT_READ:
2832 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
2836 case WTAP_ERR_SHORT_READ:
2837 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
2841 case WTAP_ERR_BAD_RECORD:
2842 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
2843 cf->filename, err_info);
2847 case WTAP_ERR_DECOMPRESS:
2848 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
2849 "(%s)", cf->filename, err_info);
2853 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
2854 cf->filename, wtap_strerror(err));
2857 if (save_file != NULL) {
2858 /* Now close the capture file. */
2859 if (!wtap_dump_close(pdh, &err))
2860 show_capture_file_io_error(save_file, err, TRUE);
2863 if (save_file != NULL) {
2864 /* Now close the capture file. */
2865 if (!wtap_dump_close(pdh, &err))
2866 show_capture_file_io_error(save_file, err, TRUE);
2868 if (print_packet_info) {
2869 if (!write_finale()) {
2871 show_print_file_io_error(err);
2878 wtap_close(cf->wth);
2881 g_free(save_file_string);
2887 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2888 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2889 gboolean filtering_tap_listeners, guint tap_flags)
2892 gboolean create_proto_tree;
2897 /* Count this packet. */
2900 /* If we're not running a display filter and we're not printing any
2901 packet information, we don't need to do a dissection. This means
2902 that all packets can be marked as 'passed'. */
2905 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2907 /* If we're going to print packet information, or we're going to
2908 run a read filter, or we're going to process taps, set up to
2909 do a dissection and do so. */
2910 if (do_dissection) {
2911 if (print_packet_info && gbl_resolv_flags)
2912 /* Grab any resolved addresses */
2913 host_name_lookup_process(NULL);
2915 if (cf->rfcode || verbose || filtering_tap_listeners ||
2916 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2917 create_proto_tree = TRUE;
2919 create_proto_tree = FALSE;
2921 /* The protocol tree will be "visible", i.e., printed, only if we're
2922 printing packet details, which is true if we're printing stuff
2923 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2925 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2927 /* If we're running a read filter, prime the epan_dissect_t with that
2930 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2932 col_custom_prime_edt(&edt, &cf->cinfo);
2934 tap_queue_init(&edt);
2936 /* We only need the columns if either
2938 1) some tap needs the columns
2942 2) we're printing packet info but we're *not* verbose; in verbose
2943 mode, we print the protocol tree, not the protocol summary. */
2944 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2949 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2950 &first_ts, &prev_dis_ts, &prev_cap_ts);
2952 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2954 tap_push_tapped_queue(&edt);
2956 /* Run the read filter if we have one. */
2958 passed = dfilter_apply_edt(cf->rfcode, &edt);
2962 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2964 /* Process this packet. */
2965 if (print_packet_info) {
2966 /* We're printing packet information; print the information for
2969 print_packet(cf, &edt);
2971 print_packet(cf, NULL);
2973 /* The ANSI C standard does not appear to *require* that a line-buffered
2974 stream be flushed to the host environment whenever a newline is
2975 written, it just says that, on such a stream, characters "are
2976 intended to be transmitted to or from the host environment as a
2977 block when a new-line character is encountered".
2979 The Visual C++ 6.0 C implementation doesn't do what is intended;
2980 even if you set a stream to be line-buffered, it still doesn't
2981 flush the buffer at the end of every line.
2983 So, if the "-l" flag was specified, we flush the standard output
2984 at the end of a packet. This will do the right thing if we're
2985 printing packet summary lines, and, as we print the entire protocol
2986 tree for a single packet without waiting for anything to happen,
2987 it should be as good as line-buffered mode if we're printing
2988 protocol trees. (The whole reason for the "-l" flag in either
2989 tcpdump or TShark is to allow the output of a live capture to
2990 be piped to a program or script and to have that script see the
2991 information for the packet as soon as it's printed, rather than
2992 having to wait until a standard I/O buffer fills up. */
2996 if (ferror(stdout)) {
2997 show_print_file_io_error(errno);
3003 if (do_dissection) {
3004 epan_dissect_cleanup(&edt);
3005 frame_data_cleanup(&fdata);
3011 write_preamble(capture_file *cf)
3013 switch (output_action) {
3016 return print_preamble(print_stream, cf ? cf->filename : NULL);
3020 write_pdml_preamble(stdout);
3022 write_psml_preamble(stdout);
3023 return !ferror(stdout);
3026 write_fields_preamble(output_fields, stdout);
3027 return !ferror(stdout);
3030 g_assert_not_reached();
3036 get_line_buf(size_t len)
3038 static char *line_bufp = NULL;
3039 static size_t line_buf_len = 256;
3040 size_t new_line_buf_len;
3042 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3043 new_line_buf_len *= 2)
3045 if (line_bufp == NULL) {
3046 line_buf_len = new_line_buf_len;
3047 line_bufp = g_malloc(line_buf_len + 1);
3049 if (new_line_buf_len > line_buf_len) {
3050 line_buf_len = new_line_buf_len;
3051 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3058 print_columns(capture_file *cf)
3065 line_bufp = get_line_buf(256);
3068 for (i = 0; i < cf->cinfo.num_cols; i++) {
3069 switch (cf->cinfo.col_fmt[i]) {
3073 * Don't print this if we're doing a live capture from a network
3074 * interface - if we're doing a live capture, you won't be
3075 * able to look at the capture in the future (it's not being
3076 * saved anywhere), so the frame numbers are unlikely to be
3079 * (XXX - it might be nice to be able to save and print at
3080 * the same time, sort of like an "Update list of packets
3081 * in real time" capture in Wireshark.)
3083 if (global_capture_opts.ifaces->len > 0)
3086 column_len = strlen(cf->cinfo.col_data[i]);
3089 line_bufp = get_line_buf(buf_offset + column_len);
3090 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3096 case COL_ABS_DATE_TIME: /* XXX - wider */
3097 column_len = strlen(cf->cinfo.col_data[i]);
3098 if (column_len < 10)
3100 line_bufp = get_line_buf(buf_offset + column_len);
3101 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3107 case COL_DEF_DL_SRC:
3108 case COL_RES_DL_SRC:
3109 case COL_UNRES_DL_SRC:
3110 case COL_DEF_NET_SRC:
3111 case COL_RES_NET_SRC:
3112 case COL_UNRES_NET_SRC:
3113 column_len = strlen(cf->cinfo.col_data[i]);
3114 if (column_len < 12)
3116 line_bufp = get_line_buf(buf_offset + column_len);
3117 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3123 case COL_DEF_DL_DST:
3124 case COL_RES_DL_DST:
3125 case COL_UNRES_DL_DST:
3126 case COL_DEF_NET_DST:
3127 case COL_RES_NET_DST:
3128 case COL_UNRES_NET_DST:
3129 column_len = strlen(cf->cinfo.col_data[i]);
3130 if (column_len < 12)
3132 line_bufp = get_line_buf(buf_offset + column_len);
3133 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3137 column_len = strlen(cf->cinfo.col_data[i]);
3138 line_bufp = get_line_buf(buf_offset + column_len);
3139 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3142 buf_offset += column_len;
3143 if (i != cf->cinfo.num_cols - 1) {
3145 * This isn't the last column, so we need to print a
3146 * separator between this column and the next.
3148 * If we printed a network source and are printing a
3149 * network destination of the same type next, separate
3150 * them with " -> "; if we printed a network destination
3151 * and are printing a network source of the same type
3152 * next, separate them with " <- "; otherwise separate them
3155 * We add enough space to the buffer for " <- " or " -> ",
3156 * even if we're only adding " ".
3158 line_bufp = get_line_buf(buf_offset + 4);
3159 switch (cf->cinfo.col_fmt[i]) {
3164 switch (cf->cinfo.col_fmt[i + 1]) {
3169 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3174 g_strlcat(line_bufp + buf_offset, " ", 5);
3180 case COL_DEF_DL_SRC:
3181 case COL_RES_DL_SRC:
3182 case COL_UNRES_DL_SRC:
3183 switch (cf->cinfo.col_fmt[i + 1]) {
3185 case COL_DEF_DL_DST:
3186 case COL_RES_DL_DST:
3187 case COL_UNRES_DL_DST:
3188 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3193 g_strlcat(line_bufp + buf_offset, " ", 5);
3199 case COL_DEF_NET_SRC:
3200 case COL_RES_NET_SRC:
3201 case COL_UNRES_NET_SRC:
3202 switch (cf->cinfo.col_fmt[i + 1]) {
3204 case COL_DEF_NET_DST:
3205 case COL_RES_NET_DST:
3206 case COL_UNRES_NET_DST:
3207 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3212 g_strlcat(line_bufp + buf_offset, " ", 5);
3221 switch (cf->cinfo.col_fmt[i + 1]) {
3226 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3231 g_strlcat(line_bufp + buf_offset, " ", 5);
3237 case COL_DEF_DL_DST:
3238 case COL_RES_DL_DST:
3239 case COL_UNRES_DL_DST:
3240 switch (cf->cinfo.col_fmt[i + 1]) {
3242 case COL_DEF_DL_SRC:
3243 case COL_RES_DL_SRC:
3244 case COL_UNRES_DL_SRC:
3245 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3250 g_strlcat(line_bufp + buf_offset, " ", 5);
3256 case COL_DEF_NET_DST:
3257 case COL_RES_NET_DST:
3258 case COL_UNRES_NET_DST:
3259 switch (cf->cinfo.col_fmt[i + 1]) {
3261 case COL_DEF_NET_SRC:
3262 case COL_RES_NET_SRC:
3263 case COL_UNRES_NET_SRC:
3264 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3269 g_strlcat(line_bufp + buf_offset, " ", 5);
3276 g_strlcat(line_bufp + buf_offset, " ", 5);
3282 return print_line(print_stream, 0, line_bufp);
3286 print_packet(capture_file *cf, epan_dissect_t *edt)
3288 print_args_t print_args;
3291 /* Print the information in the protocol tree. */
3292 switch (output_action) {
3295 print_args.to_file = TRUE;
3296 print_args.format = print_format;
3297 print_args.print_summary = !verbose;
3298 print_args.print_hex = verbose && print_hex;
3299 print_args.print_formfeed = FALSE;
3300 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3302 /* init the packet range */
3303 packet_range_init(&print_args.range);
3305 if (!proto_tree_print(&print_args, edt, print_stream))
3308 /* "print_hex_data()" will put out a leading blank line, as well
3309 as a trailing one; print one here, to separate the packets,
3310 only if "print_hex_data()" won't be called. */
3311 if (!print_line(print_stream, 0, ""))
3317 proto_tree_write_pdml(edt, stdout);
3319 return !ferror(stdout);
3321 proto_tree_write_fields(output_fields, edt, stdout);
3323 return !ferror(stdout);
3326 /* Just fill in the columns. */
3327 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3329 /* Now print them. */
3330 switch (output_action) {
3333 if (!print_columns(cf))
3338 proto_tree_write_psml(edt, stdout);
3339 return !ferror(stdout);
3340 case WRITE_FIELDS: /*No non-verbose "fields" format */
3341 g_assert_not_reached();
3346 if (!print_hex_data(print_stream, edt))
3348 if (!print_line(print_stream, 0, ""))
3357 switch (output_action) {
3360 return print_finale(print_stream);
3364 write_pdml_finale(stdout);
3366 write_psml_finale(stdout);
3367 return !ferror(stdout);
3370 write_fields_finale(output_fields, stdout);
3371 return !ferror(stdout);
3374 g_assert_not_reached();
3380 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3384 char err_msg[2048+1];
3386 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3390 /* The open succeeded. Fill in the information for this file. */
3392 /* Cleanup all data structures used for dissection. */
3393 cleanup_dissection();
3394 /* Initialize all data structures used for dissection. */
3398 cf->f_datalen = 0; /* not used, but set it anyway */
3400 /* Set the file name because we need it to set the follow stream filter.
3401 XXX - is that still true? We need it for other reasons, though,
3403 cf->filename = g_strdup(fname);
3405 /* Indicate whether it's a permanent or temporary file. */
3406 cf->is_tempfile = is_tempfile;
3408 /* If it's a temporary capture buffer file, mark it as not saved. */
3409 cf->user_saved = !is_tempfile;
3411 cf->cd_t = wtap_file_type(cf->wth);
3413 cf->drops_known = FALSE;
3415 cf->snap = wtap_snapshot_length(cf->wth);
3416 if (cf->snap == 0) {
3417 /* Snapshot length not known. */
3418 cf->has_snap = FALSE;
3419 cf->snap = WTAP_MAX_PACKET_SIZE;
3421 cf->has_snap = TRUE;
3422 nstime_set_zero(&cf->elapsed_time);
3423 nstime_set_unset(&first_ts);
3424 nstime_set_unset(&prev_dis_ts);
3425 nstime_set_unset(&prev_cap_ts);
3427 cf->state = FILE_READ_IN_PROGRESS;
3429 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3430 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3435 g_snprintf(err_msg, sizeof err_msg,
3436 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3437 cmdarg_err("%s", err_msg);
3442 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3444 char *save_file_string;
3446 save_file_string = output_file_description(fname);
3451 cmdarg_err("Not all the packets could be written to the %s because there is "
3452 "no space left on the file system.",
3458 cmdarg_err("Not all the packets could be written to the %s because you are "
3459 "too close to, or over your disk quota.",
3464 case WTAP_ERR_CANT_CLOSE:
3465 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3469 case WTAP_ERR_SHORT_WRITE:
3470 cmdarg_err("Not all the packets could be written to the %s.",
3476 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3477 wtap_strerror(err));
3479 cmdarg_err("An error occurred while writing to the %s: %s.",
3480 save_file_string, wtap_strerror(err));
3484 g_free(save_file_string);
3488 show_print_file_io_error(int err)
3493 cmdarg_err("Not all the packets could be printed because there is "
3494 "no space left on the file system.");
3499 cmdarg_err("Not all the packets could be printed because you are "
3500 "too close to, or over your disk quota.");
3505 cmdarg_err("An error occurred while printing packets: %s.",
3512 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3516 static char errmsg_errno[1024+1];
3519 /* Wiretap error. */
3522 case WTAP_ERR_NOT_REGULAR_FILE:
3523 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3526 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3527 /* Seen only when opening a capture file for reading. */
3528 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3531 case WTAP_ERR_UNSUPPORTED:
3532 /* Seen only when opening a capture file for reading. */
3533 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3534 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3537 errmsg = errmsg_errno;
3540 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3541 /* Seen only when opening a capture file for writing. */
3542 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3543 "The file \"%%s\" is a pipe, and %s capture files can't be "
3544 "written to a pipe.", wtap_file_type_string(file_type));
3545 errmsg = errmsg_errno;
3548 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3549 /* Seen only when opening a capture file for writing. */
3550 errmsg = "TShark doesn't support writing capture files in that format.";
3553 case WTAP_ERR_UNSUPPORTED_ENCAP:
3555 errmsg = "TShark can't save this capture in that format.";
3557 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3558 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3561 errmsg = errmsg_errno;
3565 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3567 errmsg = "TShark can't save this capture in that format.";
3569 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3572 case WTAP_ERR_BAD_RECORD:
3573 /* Seen only when opening a capture file for reading. */
3574 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3575 "The file \"%%s\" appears to be damaged or corrupt.\n"
3578 errmsg = errmsg_errno;
3581 case WTAP_ERR_CANT_OPEN:
3583 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3585 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3588 case WTAP_ERR_SHORT_READ:
3589 errmsg = "The file \"%s\" appears to have been cut short"
3590 " in the middle of a packet or other data.";
3593 case WTAP_ERR_SHORT_WRITE:
3594 errmsg = "A full header couldn't be written to the file \"%s\".";
3597 case WTAP_ERR_DECOMPRESS:
3598 /* Seen only when opening a capture file for reading. */
3599 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3600 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3603 errmsg = errmsg_errno;
3607 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3608 "The file \"%%s\" could not be %s: %s.",
3609 for_writing ? "created" : "opened",
3610 wtap_strerror(err));
3611 errmsg = errmsg_errno;
3615 errmsg = file_open_error_message(err, for_writing);
3620 * Open/create errors are reported with an console message in TShark.
3623 open_failure_message(const char *filename, int err, gboolean for_writing)
3625 fprintf(stderr, "tshark: ");
3626 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3627 fprintf(stderr, "\n");
3632 * General errors are reported with an console message in TShark.
3635 failure_message(const char *msg_format, va_list ap)
3637 fprintf(stderr, "tshark: ");
3638 vfprintf(stderr, msg_format, ap);
3639 fprintf(stderr, "\n");
3643 * Read errors are reported with an console message in TShark.
3646 read_failure_message(const char *filename, int err)
3648 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3649 filename, strerror(err));
3653 * Write errors are reported with an console message in TShark.
3656 write_failure_message(const char *filename, int err)
3658 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3659 filename, strerror(err));
3663 * Print to the standard error. This is a command-line tool, so there's
3664 * no need to pop up a console.
3667 vfprintf_stderr(const char *fmt, va_list ap)
3669 vfprintf(stderr, fmt, ap);
3673 fprintf_stderr(const char *fmt, ...)
3678 vfprintf_stderr(fmt, ap);
3683 * Report an error in command-line arguments.
3686 cmdarg_err(const char *fmt, ...)
3691 failure_message(fmt, ap);
3696 * Report additional information for an error in command-line arguments.
3699 cmdarg_err_cont(const char *fmt, ...)
3704 vfprintf(stderr, fmt, ap);
3705 fprintf(stderr, "\n");