3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
48 #ifdef HAVE_SYS_STAT_H
49 # include <sys/stat.h>
53 #include "wsutil/wsgetopt.h"
57 #include <epan/epan.h>
58 #include <epan/filesystem.h>
59 #include <wsutil/privileges.h>
60 #include <wsutil/file_util.h>
63 #include <epan/timestamp.h>
64 #include <epan/packet.h>
66 #include "disabled_protos.h"
67 #include <epan/prefs.h>
68 #include <epan/column.h>
70 #include <epan/addr_resolv.h>
72 #include "clopts_common.h"
73 #include "console_io.h"
74 #include "cmdarg_err.h"
75 #include "version_info.h"
76 #include <epan/plugins.h>
78 #include <epan/epan_dissect.h>
80 #include <epan/stat_cmd_args.h>
81 #include <epan/timestamp.h>
82 #include <epan/ex-opt.h>
85 #include "capture_ui_utils.h"
86 #include "capture_ifinfo.h"
87 #include "capture-pcap-util.h"
89 #include "capture-wpcap.h"
90 #include <wsutil/unicode-utils.h>
92 #include "capture_sync.h"
93 #endif /* HAVE_LIBPCAP */
95 #include <epan/funnel.h>
96 #include "capture_opts.h"
99 * This is the template for the decode as option; it is shared between the
100 * various functions that output the usage for this parameter.
102 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
104 static guint32 cum_bytes;
105 static nstime_t first_ts;
106 static frame_data *prev_dis;
107 static frame_data prev_dis_frame;
108 static frame_data *prev_cap;
109 static frame_data prev_cap_frame;
111 static const char* prev_display_dissector_name = NULL;
113 static gboolean perform_two_pass_analysis;
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
125 static output_action_e output_action;
126 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
127 static gboolean print_packet_info; /* TRUE if we're to print packet information */
128 static gint print_summary = -1; /* TRUE if we're to print packet summary information */
129 static gboolean print_details; /* TRUE if we're to print packet details information */
130 static gboolean print_hex; /* TRUE if we're to print hex/ascci information */
131 static gboolean line_buffered;
133 static print_format_e print_format = PR_FMT_TEXT;
134 static print_stream_t *print_stream;
136 static output_fields_t* output_fields = NULL;
138 /* The line separator used between packets, changeable via the -S option */
139 static char *separator = "";
143 * TRUE if we're to print packet counts to keep track of captured packets.
145 static gboolean print_packet_counts;
147 static capture_options global_capture_opts;
150 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
151 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
154 static gboolean capture(void);
155 static void report_counts(void);
157 static BOOL WINAPI capture_cleanup(DWORD);
159 static void capture_cleanup(int);
161 static void report_counts_siginfo(int);
164 #endif /* HAVE_LIBPCAP */
166 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
167 static gboolean process_packet(capture_file *cf, gint64 offset,
168 struct wtap_pkthdr *whdr,
169 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
170 static void show_capture_file_io_error(const char *, int, gboolean);
171 static void show_print_file_io_error(int err);
172 static gboolean write_preamble(capture_file *cf);
173 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
174 static gboolean write_finale(void);
175 static const char *cf_open_error_message(int err, gchar *err_info,
176 gboolean for_writing, int file_type);
178 static void open_failure_message(const char *filename, int err,
179 gboolean for_writing);
180 static void failure_message(const char *msg_format, va_list ap);
181 static void read_failure_message(const char *filename, int err);
182 static void write_failure_message(const char *filename, int err);
187 const char *sstr; /* The short string */
188 const char *lstr; /* The long string */
192 string_compare(gconstpointer a, gconstpointer b)
194 return strcmp(((const struct string_elem *)a)->sstr,
195 ((const struct string_elem *)b)->sstr);
199 string_elem_print(gpointer data, gpointer not_used _U_)
201 fprintf(stderr, " %s - %s\n",
202 ((struct string_elem *)data)->sstr,
203 ((struct string_elem *)data)->lstr);
207 list_capture_types(void) {
209 struct string_elem *captypes;
212 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
214 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
215 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
216 if (wtap_dump_can_open(i)) {
217 captypes[i].sstr = wtap_file_type_short_string(i);
218 captypes[i].lstr = wtap_file_type_string(i);
219 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
222 g_slist_foreach(list, string_elem_print, NULL);
228 print_usage(gboolean print_ver)
235 "TShark " VERSION "%s\n"
236 "Dump and analyze network traffic.\n"
237 "See http://www.wireshark.org for more information.\n"
240 wireshark_svnversion, get_copyright_info());
244 fprintf(output, "\n");
245 fprintf(output, "Usage: tshark [options] ...\n");
246 fprintf(output, "\n");
249 fprintf(output, "Capture interface:\n");
250 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
251 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
252 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
253 fprintf(output, " -p don't capture in promiscuous mode\n");
254 #ifdef HAVE_PCAP_CREATE
255 fprintf(output, " -I capture in monitor mode, if available\n");
257 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
258 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
260 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
261 fprintf(output, " -D print list of interfaces and exit\n");
262 fprintf(output, " -L print list of link-layer types of iface and exit\n");
263 fprintf(output, "\n");
264 fprintf(output, "Capture stop conditions:\n");
265 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
266 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
267 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
268 fprintf(output, " files:NUM - stop after NUM files\n");
269 /*fprintf(output, "\n");*/
270 fprintf(output, "Capture output:\n");
271 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
272 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
273 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
274 #endif /* HAVE_LIBPCAP */
275 #ifdef HAVE_PCAP_REMOTE
276 fprintf(output, "RPCAP options:\n");
277 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
279 /*fprintf(output, "\n");*/
280 fprintf(output, "Input file:\n");
281 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
283 fprintf(output, "\n");
284 fprintf(output, "Processing:\n");
285 fprintf(output, " -2 perform a two-pass analysis\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");
292 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
293 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
295 /*fprintf(output, "\n");*/
296 fprintf(output, "Output:\n");
297 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
298 fprintf(output, " (or to the standard output for \"-\")\n");
299 fprintf(output, " -C <config profile> start with specified configuration profile\n");
300 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
301 fprintf(output, " an empty \"-F\" option will list the file types\n");
302 fprintf(output, " -V add output of packet tree (Packet Details)\n");
303 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
304 fprintf(output, " separated\n");
305 fprintf(output, " -P print packet summary even when writing to a file\n");
306 fprintf(output, " -S <separator> the line separator to print between packets\n");
307 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
308 fprintf(output, " -T pdml|ps|psml|text|fields\n");
309 fprintf(output, " format of text output (def: text)\n");
310 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
311 fprintf(output, " this option can be repeated to print multiple fields\n");
312 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
313 fprintf(output, " header=y|n switch headers on and off\n");
314 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
315 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
316 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
317 fprintf(output, " aggregator\n");
318 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
319 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
320 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
321 fprintf(output, " -l flush standard output after each packet\n");
322 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
323 fprintf(output, " -W n Save extra information in the file, if supported.\n");
324 fprintf(output, " n = write network address resolution information\n");
325 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
326 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
328 fprintf(output, "\n");
329 fprintf(output, "Miscellaneous:\n");
330 fprintf(output, " -h display this help and exit\n");
331 fprintf(output, " -v display version info and exit\n");
332 fprintf(output, " -o <name>:<value> ... override preference setting\n");
333 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
334 fprintf(output, " -G [report] dump one of several available reports and exit\n");
335 fprintf(output, " default report=\"fields\"\n");
336 fprintf(output, " use \"-G ?\" for more help\n");
340 glossary_option_help(void)
346 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
348 fprintf(output, "\n");
349 fprintf(output, "Usage: tshark -G [report]\n");
350 fprintf(output, "\n");
351 fprintf(output, "Glossary table reports:\n");
352 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
353 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
354 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
355 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
356 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
357 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
358 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
359 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
360 fprintf(output, "\n");
361 fprintf(output, "Preference reports:\n");
362 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
363 fprintf(output, " -G currentprefs dump current preferences and exit\n");
364 fprintf(output, "\n");
369 * For a dissector table, print on the stream described by output,
370 * its short name (which is what's used in the "-d" option) and its
374 display_dissector_table_names(const char *table_name, const char *ui_name,
377 if ((prev_display_dissector_name == NULL) ||
378 (strcmp(prev_display_dissector_name, table_name) != 0)) {
379 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
380 prev_display_dissector_name = table_name;
385 * For a dissector handle, print on the stream described by output,
386 * the filter name (which is what's used in the "-d" option) and the full
387 * name for the protocol that corresponds to this handle.
390 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
393 const gchar *proto_filter_name;
394 const gchar *proto_ui_name;
396 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
398 if (proto_id != -1) {
399 proto_filter_name = proto_get_protocol_filter_name(proto_id);
400 proto_ui_name = proto_get_protocol_name(proto_id);
401 g_assert(proto_filter_name != NULL);
402 g_assert(proto_ui_name != NULL);
404 if ((prev_display_dissector_name == NULL) ||
405 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
406 fprintf((FILE *)output, "\t%s (%s)\n",
409 prev_display_dissector_name = proto_filter_name;
415 * The protocol_name_search structure is used by find_protocol_name_func()
416 * to pass parameters and store results
418 struct protocol_name_search{
419 gchar *searched_name; /* Protocol filter name we are looking for */
420 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
421 guint nb_match; /* How many dissectors matched searched_name */
423 typedef struct protocol_name_search *protocol_name_search_t;
426 * This function parses all dissectors associated with a table to find the
427 * one whose protocol has the specified filter name. It is called
428 * as a reference function in a call to dissector_table_foreach_handle.
429 * The name we are looking for, as well as the results, are stored in the
430 * protocol_name_search struct pointed to by user_data.
431 * If called using dissector_table_foreach_handle, we actually parse the
432 * whole list of dissectors.
435 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
439 const gchar *protocol_filter_name;
440 protocol_name_search_t search_info;
444 search_info = (protocol_name_search_t)user_data;
446 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
447 if (proto_id != -1) {
448 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
449 g_assert(protocol_filter_name != NULL);
450 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
452 if (search_info->nb_match == 0) {
453 /* Record this handle only if this is the first match */
454 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
456 search_info->nb_match++;
462 * Allow dissector key names to be sorted alphabetically
466 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
468 return strcmp((const char*)dissector_a, (const char*)dissector_b);
472 * Print all layer type names supported.
473 * We send the output to the stream described by the handle output.
477 fprint_all_layer_types(FILE *output)
480 prev_display_dissector_name = NULL;
481 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
485 * Print all protocol names supported for a specific layer type.
486 * table_name contains the layer type name in which the search is performed.
487 * We send the output to the stream described by the handle output.
491 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
494 prev_display_dissector_name = NULL;
495 dissector_table_foreach_handle(table_name,
496 display_dissector_names,
501 * The function below parses the command-line parameters for the decode as
502 * feature (a string pointer by cl_param).
503 * It checks the format of the command-line, searches for a matching table
504 * and dissector. If a table/dissector match is not found, we display a
505 * summary of the available tables/dissectors (on stderr) and return FALSE.
506 * If everything is fine, we get the "Decode as" preference activated,
507 * then we return TRUE.
510 add_decode_as(const gchar *cl_param)
513 guint32 selector, selector2;
514 gchar *decoded_param;
515 gchar *remaining_param;
517 gchar *dissector_str;
518 dissector_handle_t dissector_matching;
519 dissector_table_t table_matching;
520 ftenum_t dissector_table_selector_type;
521 struct protocol_name_search user_protocol_name;
525 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
528 decoded_param = g_strdup(cl_param);
529 g_assert(decoded_param);
532 /* The lines below will parse this string (modifying it) to extract all
533 necessary information. Note that decoded_param is still needed since
534 strings are not copied - we just save pointers. */
536 /* This section extracts a layer type (table_name) from decoded_param */
537 table_name = decoded_param; /* Layer type string starts from beginning */
539 remaining_param = strchr(table_name, '=');
540 if (remaining_param == NULL) {
541 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
542 /* If the argument does not follow the template, carry on anyway to check
543 if the table name is at least correct. If remaining_param is NULL,
544 we'll exit anyway further down */
547 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
550 /* Remove leading and trailing spaces from the table name */
551 while ( table_name[0] == ' ' )
553 while ( table_name[strlen(table_name) - 1] == ' ' )
554 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
556 /* The following part searches a table matching with the layer type specified */
557 table_matching = NULL;
559 /* Look for the requested table */
560 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
561 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
564 table_matching = find_dissector_table(table_name);
565 if (!table_matching) {
566 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
570 if (!table_matching) {
571 /* Display a list of supported layer types to help the user, if the
572 specified layer type was not found */
573 cmdarg_err("Valid layer types are:");
574 fprint_all_layer_types(stderr);
576 if (remaining_param == NULL || !table_matching) {
577 /* Exit if the layer type was not found, or if no '=' separator was found
579 g_free(decoded_param);
583 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
584 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
587 remaining_param++; /* Move to the second '=' */
588 *remaining_param = '\0'; /* Remove the second '=' */
590 remaining_param++; /* Position after the layer type string */
592 /* This section extracts a selector value (selector_str) from decoded_param */
594 selector_str = remaining_param; /* Next part starts with the selector number */
596 remaining_param = strchr(selector_str, ',');
597 if (remaining_param == NULL) {
598 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
599 /* If the argument does not follow the template, carry on anyway to check
600 if the selector value is at least correct. If remaining_param is NULL,
601 we'll exit anyway further down */
604 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
607 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
609 switch (dissector_table_selector_type) {
615 /* The selector for this table is an unsigned number. Parse it as such.
616 There's no need to remove leading and trailing spaces from the
617 selector number string, because sscanf will do that for us. */
618 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
623 if (op != ':' && op != '-') {
624 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
625 g_free(decoded_param);
629 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
630 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
631 g_free(decoded_param);
635 else if (selector2 < selector) {
636 /* We could swap them for the user, but maybe it's better to call
637 * this out as an error in case it's not what was intended? */
638 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
639 g_free(decoded_param);
644 cmdarg_err("Invalid selector number \"%s\"", selector_str);
645 g_free(decoded_param);
652 /* The selector for this table is a string. */
656 /* There are currently no dissector tables with any types other
657 than the ones listed above. */
658 g_assert_not_reached();
661 if (remaining_param == NULL) {
662 /* Exit if no ',' separator was found (see above) */
663 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
664 fprint_all_protocols_for_layer_types(stderr, table_name);
665 g_free(decoded_param);
669 remaining_param++; /* Position after the selector number string */
671 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
673 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
675 /* Remove leading and trailing spaces from the dissector name */
676 while ( dissector_str[0] == ' ' )
678 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
679 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
681 dissector_matching = NULL;
683 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
684 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 */
685 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
688 user_protocol_name.nb_match = 0;
689 user_protocol_name.searched_name = dissector_str;
690 user_protocol_name.matched_handle = NULL;
692 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 */
694 if (user_protocol_name.nb_match != 0) {
695 dissector_matching = user_protocol_name.matched_handle;
696 if (user_protocol_name.nb_match > 1) {
697 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
701 /* OK, check whether the problem is that there isn't any such
702 protocol, or that there is but it's not specified as a protocol
703 that's valid for that dissector table.
704 Note, we don't exit here, but dissector_matching will remain NULL,
706 if (proto_get_id_by_filter_name(dissector_str) == -1) {
707 /* No such protocol */
708 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
710 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
711 dissector_str, table_name);
716 if (!dissector_matching) {
717 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
718 fprint_all_protocols_for_layer_types(stderr, table_name);
719 g_free(decoded_param);
723 /* This is the end of the code that parses the command-line options.
724 All information is now stored in the variables:
728 The above variables that are strings are still pointing to areas within
729 decoded_parm. decoded_parm thus still needs to be kept allocated in
730 until we stop needing these variables
731 decoded_param will be deallocated at each exit point of this function */
734 /* We now have a pointer to the handle for the requested dissector
735 (requested protocol) inside the variable dissector_matching */
736 switch (dissector_table_selector_type) {
742 /* The selector for this table is an unsigned number. */
744 dissector_change_uint(table_name, selector, dissector_matching);
745 } else if (op == ':') {
746 for (i = selector; i < (guint64)selector + selector2; i++) {
747 dissector_change_uint(table_name, (guint32)i, dissector_matching);
749 } else { /* op == '-' */
750 for (i = selector; i <= selector2; i++) {
751 dissector_change_uint(table_name, (guint32)i, dissector_matching);
758 /* The selector for this table is a string. */
759 dissector_change_string(table_name, selector_str, dissector_matching);
763 /* There are currently no dissector tables with any types other
764 than the ones listed above. */
765 g_assert_not_reached();
767 g_free(decoded_param); /* "Decode As" rule has been successfully added */
772 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
773 const gchar *message, gpointer user_data)
775 /* ignore log message, if log_level isn't interesting based
776 upon the console log preferences.
777 If the preferences haven't been loaded loaded yet, display the
780 The default console_log_level preference value is such that only
781 ERROR, CRITICAL and WARNING level messages are processed;
782 MESSAGE, INFO and DEBUG level messages are ignored.
784 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
785 ERROR and CRITICAL level messages so the current code is a behavioral
786 change. The current behavior is the same as in Wireshark.
788 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
789 prefs.console_log_level != 0) {
793 g_log_default_handler(log_domain, log_level, message, user_data);
798 output_file_description(const char *fname)
800 char *save_file_string;
802 /* Get a string that describes what we're writing to */
803 if (strcmp(fname, "-") == 0) {
804 /* We're writing to the standard output */
805 save_file_string = g_strdup("standard output");
807 /* We're writing to a file with the name in save_file */
808 save_file_string = g_strdup_printf("file \"%s\"", fname);
810 return save_file_string;
814 print_current_user(void) {
815 gchar *cur_user, *cur_group;
817 if (started_with_special_privs()) {
818 cur_user = get_cur_username();
819 cur_group = get_cur_groupname();
820 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
821 cur_user, cur_group);
824 if (running_with_special_privs()) {
825 fprintf(stderr, " This could be dangerous.");
827 fprintf(stderr, "\n");
832 check_capture_privs(void) {
835 /* Warn the user if npf.sys isn't loaded. */
836 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
837 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
838 "capturing or\nlisting interfaces.\n");
844 show_version(GString *comp_info_str, GString *runtime_info_str)
846 printf("TShark " VERSION "%s\n"
853 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
854 runtime_info_str->str);
858 main(int argc, char *argv[])
860 char *init_progfile_dir_error;
862 gboolean arg_error = FALSE;
868 char *gpf_path, *pf_path;
869 char *gdp_path, *dp_path;
870 int gpf_open_errno, gpf_read_errno;
871 int pf_open_errno, pf_read_errno;
872 int gdp_open_errno, gdp_read_errno;
873 int dp_open_errno, dp_read_errno;
875 volatile int exit_status = 0;
877 gboolean list_link_layer_types = FALSE;
878 gboolean start_capture = FALSE;
883 gboolean capture_option_specified = FALSE;
885 gboolean quiet = FALSE;
886 #ifdef PCAP_NG_DEFAULT
887 volatile int out_file_type = WTAP_FILE_PCAPNG;
889 volatile int out_file_type = WTAP_FILE_PCAP;
891 volatile gboolean out_file_name_res = FALSE;
892 gchar *hosts_file = NULL;
893 gchar *volatile cf_name = NULL;
894 gchar *rfilter = NULL;
895 #ifdef HAVE_PCAP_OPEN_DEAD
896 struct bpf_program fcode;
898 dfilter_t *rfcode = NULL;
901 GLogLevelFlags log_flags;
903 gchar *output_only = NULL;
905 #ifdef HAVE_PCAP_REMOTE
906 #define OPTSTRING_A "A:"
908 #define OPTSTRING_A ""
911 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
912 #define OPTSTRING_B "B:"
914 #define OPTSTRING_B ""
915 #endif /* _WIN32 or HAVE_PCAP_CREATE */
916 #else /* HAVE_LIBPCAP */
917 #define OPTSTRING_B ""
918 #endif /* HAVE_LIBPCAP */
920 #ifdef HAVE_PCAP_CREATE
921 #define OPTSTRING_I "I"
923 #define OPTSTRING_I ""
926 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqr:R:s:S:t:T:u:vVw:W:xX:y:z:"
928 static const char optstring[] = OPTSTRING;
931 arg_list_utf_16to8(argc, argv);
932 #if !GLIB_CHECK_VERSION(2,31,0)
938 * Get credential information for later use.
940 init_process_policies();
943 * Attempt to get the pathname of the executable file.
945 init_progfile_dir_error = init_progfile_dir(argv[0], main);
946 if (init_progfile_dir_error != NULL) {
947 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
948 init_progfile_dir_error);
952 * In order to have the -X opts assigned before the wslua machine starts
953 * we need to call getopts before epan_init() gets called.
956 optind_initial = optind;
958 while ((opt = getopt(argc, argv, optstring)) != -1) {
960 case 'C': /* Configuration Profile */
961 if (profile_exists (optarg, FALSE)) {
962 set_profile_name (optarg);
964 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
968 case 'P': /* Print packet summary info even when writing to a file */
969 print_packet_info = TRUE;
970 print_summary = TRUE;
972 case 'O': /* Only output these protocols */
973 output_only = g_strdup(optarg);
975 case 'V': /* Verbose */
976 print_details = TRUE;
977 print_packet_info = TRUE;
979 case 'x': /* Print packet data in hex (and ASCII) */
981 /* The user asked for hex output, so let's ensure they get it,
982 * even if they're writing to a file.
984 print_packet_info = TRUE;
995 * Print packet summary information is the default, unless either -V or -x
996 * were specified and -P was not. Note that this is new behavior, which
997 * allows for the possibility of printing only hex/ascii output without
998 * necessarily requiring that either the summary or details be printed too.
1000 if (print_summary == -1)
1001 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1003 optind = optind_initial;
1008 /** Send All g_log messages to our own handler **/
1012 G_LOG_LEVEL_CRITICAL|
1013 G_LOG_LEVEL_WARNING|
1014 G_LOG_LEVEL_MESSAGE|
1017 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1019 g_log_set_handler(NULL,
1021 tshark_log_handler, NULL /* user_data */);
1022 g_log_set_handler(LOG_DOMAIN_MAIN,
1024 tshark_log_handler, NULL /* user_data */);
1027 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1029 tshark_log_handler, NULL /* user_data */);
1030 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1032 tshark_log_handler, NULL /* user_data */);
1035 initialize_funnel_ops();
1038 capture_opts_init(&global_capture_opts, &cfile);
1041 timestamp_set_type(TS_RELATIVE);
1042 timestamp_set_precision(TS_PREC_AUTO);
1043 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1045 /* Register all dissectors; we must do this before checking for the
1046 "-G" flag, as the "-G" flag dumps information registered by the
1047 dissectors, and we must do it before we read the preferences, in
1048 case any dissectors register preferences. */
1049 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1050 failure_message, open_failure_message, read_failure_message,
1051 write_failure_message);
1053 /* Register all tap listeners; we do this before we parse the arguments,
1054 as the "-z" argument can specify a registered tap. */
1056 /* we register the plugin taps before the other taps because
1057 stats_tree taps plugins will be registered as tap listeners
1058 by stats_tree_stat.c and need to registered before that */
1060 register_all_plugin_tap_listeners();
1062 register_all_tap_listeners();
1064 /* If invoked with the "-G" flag, we dump out information based on
1065 the argument to the "-G" flag; if no argument is specified,
1066 for backwards compatibility we dump out a glossary of display
1069 XXX - we do this here, for now, to support "-G" with no arguments.
1070 If none of our build or other processes uses "-G" with no arguments,
1071 we can just process it with the other arguments. */
1072 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1073 proto_initialize_all_prefixes();
1076 proto_registrar_dump_fields(1);
1078 if (strcmp(argv[2], "fields") == 0)
1079 proto_registrar_dump_fields(1);
1080 else if (strcmp(argv[2], "fields2") == 0)
1081 proto_registrar_dump_fields(2);
1082 else if (strcmp(argv[2], "fields3") == 0)
1083 proto_registrar_dump_fields(3);
1084 else if (strcmp(argv[2], "protocols") == 0)
1085 proto_registrar_dump_protocols();
1086 else if (strcmp(argv[2], "values") == 0)
1087 proto_registrar_dump_values();
1088 else if (strcmp(argv[2], "ftypes") == 0)
1089 proto_registrar_dump_ftypes();
1090 else if (strcmp(argv[2], "decodes") == 0)
1091 dissector_dump_decodes();
1092 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1093 dissector_dump_heur_decodes();
1094 else if (strcmp(argv[2], "defaultprefs") == 0)
1096 else if (strcmp(argv[2], "plugins") == 0)
1098 else if (strcmp(argv[2], "?") == 0)
1099 glossary_option_help();
1100 else if (strcmp(argv[2], "-?") == 0)
1101 glossary_option_help();
1102 else if (strcmp(argv[2], "currentprefs") == 0) {
1103 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1104 &pf_open_errno, &pf_read_errno, &pf_path);
1107 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1114 /* Set the C-language locale to the native environment. */
1115 setlocale(LC_ALL, "");
1117 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1118 &pf_open_errno, &pf_read_errno, &pf_path);
1119 if (gpf_path != NULL) {
1120 if (gpf_open_errno != 0) {
1121 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1122 pf_path, g_strerror(gpf_open_errno));
1124 if (gpf_read_errno != 0) {
1125 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1126 pf_path, g_strerror(gpf_read_errno));
1129 if (pf_path != NULL) {
1130 if (pf_open_errno != 0) {
1131 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1132 g_strerror(pf_open_errno));
1134 if (pf_read_errno != 0) {
1135 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1136 pf_path, g_strerror(pf_read_errno));
1142 /* Read the disabled protocols file. */
1143 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1144 &dp_path, &dp_open_errno, &dp_read_errno);
1145 if (gdp_path != NULL) {
1146 if (gdp_open_errno != 0) {
1147 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1148 gdp_path, g_strerror(gdp_open_errno));
1150 if (gdp_read_errno != 0) {
1151 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1152 gdp_path, g_strerror(gdp_read_errno));
1156 if (dp_path != NULL) {
1157 if (dp_open_errno != 0) {
1159 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1160 g_strerror(dp_open_errno));
1162 if (dp_read_errno != 0) {
1164 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1165 g_strerror(dp_read_errno));
1170 check_capture_privs();
1172 cap_file_init(&cfile);
1174 /* Print format defaults to this. */
1175 print_format = PR_FMT_TEXT;
1177 output_fields = output_fields_new();
1179 /* Now get our args */
1180 while ((opt = getopt(argc, argv, optstring)) != -1) {
1182 case '2': /* Perform two pass analysis */
1183 perform_two_pass_analysis = TRUE;
1185 case 'a': /* autostop criteria */
1186 case 'b': /* Ringbuffer option */
1187 case 'c': /* Capture x packets */
1188 case 'f': /* capture filter */
1189 case 'i': /* Use interface x */
1190 case 'p': /* Don't capture in promiscuous mode */
1191 #ifdef HAVE_PCAP_REMOTE
1192 case 'A': /* Authentication */
1194 #ifdef HAVE_PCAP_CREATE
1195 case 'I': /* Capture in monitor mode, if available */
1197 case 's': /* Set the snapshot (capture) length */
1198 case 'w': /* Write to capture file x */
1199 case 'y': /* Set the pcap data link type */
1200 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1201 case 'B': /* Buffer size */
1202 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1204 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1209 capture_option_specified = TRUE;
1214 /* Configuration profile settings were already processed just ignore them this time*/
1216 case 'd': /* Decode as rule */
1217 if (!add_decode_as(optarg))
1220 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1221 case 'K': /* Kerberos keytab file */
1222 read_keytab_file(optarg);
1225 case 'D': /* Print a list of capture devices and exit */
1227 if_list = capture_interface_list(&err, &err_str);
1228 if (if_list == NULL) {
1230 case CANT_GET_INTERFACE_LIST:
1231 case DONT_HAVE_PCAP:
1232 cmdarg_err("%s", err_str);
1236 case NO_INTERFACES_FOUND:
1237 cmdarg_err("There are no interfaces on which a capture can be done");
1242 capture_opts_print_interfaces(if_list);
1243 free_interface_list(if_list);
1246 capture_option_specified = TRUE;
1252 output_fields_add(output_fields, optarg);
1256 if (!output_fields_set_option(output_fields, optarg)) {
1257 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1258 output_fields_list_options(stderr);
1263 out_file_type = wtap_short_string_to_file_type(optarg);
1264 if (out_file_type < 0) {
1265 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1266 list_capture_types();
1270 case 'W': /* Select extra information to save in our capture file */
1271 /* This is patterned after the -N flag which may not be the best idea. */
1272 if (strchr(optarg, 'n')) {
1273 out_file_name_res = TRUE;
1275 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1279 case 'H': /* Read address to name mappings from a hosts file */
1280 hosts_file = optarg;
1281 out_file_name_res = TRUE;
1284 case 'h': /* Print help and exit */
1288 case 'l': /* "Line-buffer" standard output */
1289 /* This isn't line-buffering, strictly speaking, it's just
1290 flushing the standard output after the information for
1291 each packet is printed; however, that should be good
1292 enough for all the purposes to which "-l" is put (and
1293 is probably actually better for "-V", as it does fewer
1296 See the comment in "process_packet()" for an explanation of
1297 why we do that, and why we don't just use "setvbuf()" to
1298 make the standard output line-buffered (short version: in
1299 Windows, "line-buffered" is the same as "fully-buffered",
1300 and the output buffer is only flushed when it fills up). */
1301 line_buffered = TRUE;
1303 case 'L': /* Print list of link-layer types and exit */
1305 list_link_layer_types = TRUE;
1307 capture_option_specified = TRUE;
1311 case 'n': /* No name resolution */
1312 gbl_resolv_flags.mac_name = FALSE;
1313 gbl_resolv_flags.network_name = FALSE;
1314 gbl_resolv_flags.transport_name = FALSE;
1315 gbl_resolv_flags.concurrent_dns = FALSE;
1317 case 'N': /* Select what types of addresses/port #s to resolve */
1318 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1319 if (badopt != '\0') {
1320 cmdarg_err("-N specifies unknown resolving option '%c';",
1322 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1326 case 'o': /* Override preference from command line */
1327 switch (prefs_set_pref(optarg)) {
1332 case PREFS_SET_SYNTAX_ERR:
1333 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1337 case PREFS_SET_NO_SUCH_PREF:
1338 case PREFS_SET_OBSOLETE:
1339 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1344 case 'q': /* Quiet */
1347 case 'r': /* Read capture file x */
1348 cf_name = g_strdup(optarg);
1350 case 'R': /* Read file filter */
1354 /* already processed; just ignore it now */
1356 case 'S': /* Set the line Separator to be printed between packets */
1357 separator = strdup(optarg);
1359 case 't': /* Time stamp type */
1360 if (strcmp(optarg, "r") == 0)
1361 timestamp_set_type(TS_RELATIVE);
1362 else if (strcmp(optarg, "a") == 0)
1363 timestamp_set_type(TS_ABSOLUTE);
1364 else if (strcmp(optarg, "ad") == 0)
1365 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1366 else if (strcmp(optarg, "d") == 0)
1367 timestamp_set_type(TS_DELTA);
1368 else if (strcmp(optarg, "dd") == 0)
1369 timestamp_set_type(TS_DELTA_DIS);
1370 else if (strcmp(optarg, "e") == 0)
1371 timestamp_set_type(TS_EPOCH);
1372 else if (strcmp(optarg, "u") == 0)
1373 timestamp_set_type(TS_UTC);
1374 else if (strcmp(optarg, "ud") == 0)
1375 timestamp_set_type(TS_UTC_WITH_DATE);
1377 cmdarg_err("Invalid time stamp type \"%s\"",
1379 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1380 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1384 case 'T': /* printing Type */
1385 if (strcmp(optarg, "text") == 0) {
1386 output_action = WRITE_TEXT;
1387 print_format = PR_FMT_TEXT;
1388 } else if (strcmp(optarg, "ps") == 0) {
1389 output_action = WRITE_TEXT;
1390 print_format = PR_FMT_PS;
1391 } else if (strcmp(optarg, "pdml") == 0) {
1392 output_action = WRITE_XML;
1393 print_details = TRUE; /* Need details */
1394 print_summary = FALSE; /* Don't allow summary */
1395 } else if (strcmp(optarg, "psml") == 0) {
1396 output_action = WRITE_XML;
1397 print_details = FALSE; /* Don't allow details */
1398 print_summary = TRUE; /* Need summary */
1399 } else if (strcmp(optarg, "fields") == 0) {
1400 output_action = WRITE_FIELDS;
1401 print_details = TRUE; /* Need full tree info */
1402 print_summary = FALSE; /* Don't allow summary */
1404 cmdarg_err("Invalid -T parameter.");
1405 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1409 case 'u': /* Seconds type */
1410 if (strcmp(optarg, "s") == 0)
1411 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1412 else if (strcmp(optarg, "hms") == 0)
1413 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1415 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1416 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1420 case 'v': /* Show version and exit */
1422 GString *comp_info_str;
1423 GString *runtime_info_str;
1424 /* Assemble the compile-time version information string */
1425 comp_info_str = g_string_new("Compiled ");
1426 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1428 /* Assemble the run-time version information string */
1429 runtime_info_str = g_string_new("Running ");
1430 get_runtime_version_info(runtime_info_str, NULL);
1431 show_version(comp_info_str, runtime_info_str);
1432 g_string_free(comp_info_str, TRUE);
1433 g_string_free(runtime_info_str, TRUE);
1436 case 'O': /* Only output these protocols */
1437 /* already processed; just ignore it now */
1439 case 'V': /* Verbose */
1440 /* already processed; just ignore it now */
1442 case 'x': /* Print packet data in hex (and ASCII) */
1443 /* already processed; just ignore it now */
1448 /* We won't call the init function for the stat this soon
1449 as it would disallow MATE's fields (which are registered
1450 by the preferences set callback) from being used as
1451 part of a tap filter. Instead, we just add the argument
1452 to a list of stat arguments. */
1453 if (!process_stat_cmd_arg(optarg)) {
1454 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1455 cmdarg_err_cont(" -z argument must be one of :");
1456 list_stat_cmd_args();
1461 case '?': /* Bad flag - print usage message */
1464 list_capture_types();
1474 /* If we specified output fields, but not the output field type... */
1475 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1476 cmdarg_err("Output fields were specified with \"-e\", "
1477 "but \"-Tfields\" was not specified.");
1479 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1480 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1481 "specified with \"-e\".");
1486 /* If no capture filter or read filter has been specified, and there are
1487 still command-line arguments, treat them as the tokens of a capture
1488 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1489 flag was specified. */
1490 if (optind < argc) {
1491 if (cf_name != NULL) {
1492 if (rfilter != NULL) {
1493 cmdarg_err("Read filters were specified both with \"-R\" "
1494 "and with additional command-line arguments.");
1497 rfilter = get_args_as_string(argc, argv, optind);
1502 if (global_capture_opts.default_options.cfilter) {
1503 cmdarg_err("A default capture filter was specified both with \"-f\""
1504 " and with additional command-line arguments.");
1507 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1508 interface_options interface_opts;
1509 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1510 if (interface_opts.cfilter == NULL) {
1511 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1512 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1513 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1515 cmdarg_err("A capture filter was specified both with \"-f\""
1516 " and with additional command-line arguments.");
1520 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1522 capture_option_specified = TRUE;
1528 if (!global_capture_opts.saving_to_file) {
1529 /* We're not saving the capture to a file; if "-q" wasn't specified,
1530 we should print packet information */
1532 print_packet_info = TRUE;
1534 /* We're saving to a file; if we're writing to the standard output.
1535 and we'll also be writing dissected packets to the standard
1536 output, reject the request. At best, we could redirect that
1537 to the standard error; we *can't* write both to the standard
1538 output and have either of them be useful. */
1539 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1540 cmdarg_err("You can't write both raw packet data and dissected packets"
1541 " to the standard output.");
1546 /* We're not saving the capture to a file; if "-q" wasn't specified,
1547 we should print packet information */
1549 print_packet_info = TRUE;
1552 #ifndef HAVE_LIBPCAP
1553 if (capture_option_specified)
1554 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1561 /* We don't support capture filters when reading from a capture file
1562 (the BPF compiler doesn't support all link-layer types that we
1563 support in capture files we read). */
1565 if (cf_name != NULL) {
1566 if (global_capture_opts.default_options.cfilter) {
1567 cmdarg_err("Only read filters, not capture filters, "
1568 "can be specified when reading a capture file.");
1575 if (output_action != WRITE_TEXT) {
1576 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1581 if (output_only != NULL) {
1584 if (!print_details) {
1585 cmdarg_err("-O requires -V");
1589 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1590 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1591 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1596 if (list_link_layer_types) {
1597 /* We're supposed to list the link-layer types for an interface;
1598 did the user also specify a capture file to be read? */
1600 /* Yes - that's bogus. */
1601 cmdarg_err("You can't specify -L and a capture file to be read.");
1604 /* No - did they specify a ring buffer option? */
1605 if (global_capture_opts.multi_files_on) {
1606 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1612 * "-r" was specified, so we're reading a capture file.
1613 * Capture options don't apply here.
1615 if (global_capture_opts.multi_files_on) {
1616 cmdarg_err("Multiple capture files requested, but "
1617 "a capture isn't being done.");
1620 if (global_capture_opts.has_file_duration) {
1621 cmdarg_err("Switching capture files after a time interval was specified, but "
1622 "a capture isn't being done.");
1625 if (global_capture_opts.has_ring_num_files) {
1626 cmdarg_err("A ring buffer of capture files was specified, but "
1627 "a capture isn't being done.");
1630 if (global_capture_opts.has_autostop_files) {
1631 cmdarg_err("A maximum number of capture files was specified, but "
1632 "a capture isn't being done.");
1636 /* Note: TShark now allows the restriction of a _read_ file by packet count
1637 * and byte count as well as a write file. Other autostop options remain valid
1638 * only for a write file.
1640 if (global_capture_opts.has_autostop_duration) {
1641 cmdarg_err("A maximum capture time was specified, but "
1642 "a capture isn't being done.");
1647 * "-r" wasn't specified, so we're doing a live capture.
1649 if (global_capture_opts.saving_to_file) {
1650 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1652 /* When capturing, we only support writing pcap or pcap-ng format. */
1653 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1654 cmdarg_err("Live captures can only be saved in libpcap format.");
1657 if (global_capture_opts.multi_files_on) {
1658 /* Multiple-file mode doesn't work under certain conditions:
1659 a) it doesn't work if you're writing to the standard output;
1660 b) it doesn't work if you're writing to a pipe;
1662 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1663 cmdarg_err("Multiple capture files requested, but "
1664 "the capture is being written to the standard output.");
1667 if (global_capture_opts.output_to_pipe) {
1668 cmdarg_err("Multiple capture files requested, but "
1669 "the capture file is a pipe.");
1672 if (!global_capture_opts.has_autostop_filesize &&
1673 !global_capture_opts.has_file_duration) {
1674 cmdarg_err("Multiple capture files requested, but "
1675 "no maximum capture file size or duration was specified.");
1679 /* Currently, we don't support read filters when capturing
1680 and saving the packets. */
1681 if (rfilter != NULL) {
1682 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1686 /* They didn't specify a "-w" flag, so we won't be saving to a
1687 capture file. Check for options that only make sense if
1688 we're saving to a file. */
1689 if (global_capture_opts.has_autostop_filesize) {
1690 cmdarg_err("Maximum capture file size specified, but "
1691 "capture isn't being saved to a file.");
1694 if (global_capture_opts.multi_files_on) {
1695 cmdarg_err("Multiple capture files requested, but "
1696 "the capture isn't being saved to a file.");
1705 /* Start windows sockets */
1706 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1709 /* Notify all registered modules that have had any of their preferences
1710 changed either from one of the preferences file or from the command
1711 line that their preferences have changed. */
1714 /* At this point MATE will have registered its field array so we can
1715 have a tap filter with one of MATE's late-registered fields as part
1716 of the filter. We can now process all the "-z" arguments. */
1717 start_requested_stats();
1720 /* We currently don't support taps, or printing dissected packets,
1721 if we're writing to a pipe. */
1722 if (global_capture_opts.saving_to_file &&
1723 global_capture_opts.output_to_pipe) {
1724 if (tap_listeners_require_dissection()) {
1725 cmdarg_err("Taps aren't supported when saving to a pipe.");
1728 if (print_packet_info) {
1729 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1735 /* disabled protocols as per configuration file */
1736 if (gdp_path == NULL && dp_path == NULL) {
1737 set_disabled_protos_list();
1740 /* Build the column format array */
1741 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1744 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1745 capture_opts_trim_ring_num_files(&global_capture_opts);
1748 if (rfilter != NULL) {
1749 if (!dfilter_compile(rfilter, &rfcode)) {
1750 cmdarg_err("%s", dfilter_error_msg);
1752 #ifdef HAVE_PCAP_OPEN_DEAD
1756 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1758 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1760 " Note: That display filter code looks like a valid capture filter;");
1762 " maybe you mixed them up?");
1771 cfile.rfcode = rfcode;
1773 if (print_packet_info) {
1774 /* If we're printing as text or PostScript, we have
1775 to create a print stream. */
1776 if (output_action == WRITE_TEXT) {
1777 switch (print_format) {
1780 print_stream = print_stream_text_stdio_new(stdout);
1784 print_stream = print_stream_ps_stdio_new(stdout);
1788 g_assert_not_reached();
1793 /* We have to dissect each packet if:
1795 we're printing information about each packet;
1797 we're using a read filter on the packets;
1799 we're using any taps that need dissection. */
1800 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1804 * We're reading a capture file.
1808 * Immediately relinquish any special privileges we have; we must not
1809 * be allowed to read any capture files the user running TShark
1812 relinquish_special_privs_perm();
1813 print_current_user();
1815 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1820 /* Set timestamp precision; there should arguably be a command-line
1821 option to let the user set this. */
1822 switch(wtap_file_tsprecision(cfile.wth)) {
1823 case(WTAP_FILE_TSPREC_SEC):
1824 timestamp_set_precision(TS_PREC_AUTO_SEC);
1826 case(WTAP_FILE_TSPREC_DSEC):
1827 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1829 case(WTAP_FILE_TSPREC_CSEC):
1830 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1832 case(WTAP_FILE_TSPREC_MSEC):
1833 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1835 case(WTAP_FILE_TSPREC_USEC):
1836 timestamp_set_precision(TS_PREC_AUTO_USEC);
1838 case(WTAP_FILE_TSPREC_NSEC):
1839 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1842 g_assert_not_reached();
1845 /* Read in the hosts file after cf_open() (which calls init_dissection()
1846 * which resets the name database).
1849 if (! read_hosts_file(hosts_file)) {
1850 cmdarg_err("Can't read host entries from \"%s\"", hosts_file);
1855 /* Process the packets in the file */
1858 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1859 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1860 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1862 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1865 CATCH(OutOfMemoryError) {
1869 "Sorry, but TShark has to terminate now!\n"
1871 "Some infos / workarounds can be found at:\n"
1872 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1877 /* We still dump out the results of taps, etc., as we might have
1878 read some packets; however, we exit with an error status. */
1882 /* No capture file specified, so we're supposed to do a live capture
1883 (or get a list of link-layer types for a live capture device);
1884 do we have support for live captures? */
1886 /* trim the interface name and exit if that failed */
1887 exit_status = capture_opts_trim_iface(&global_capture_opts,
1888 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1889 if (exit_status != 0)
1892 /* if requested, list the link layer types and exit */
1893 if (list_link_layer_types) {
1896 /* Get the list of link-layer types for the capture devices. */
1897 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1898 interface_options interface_opts;
1899 if_capabilities_t *caps;
1901 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1902 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1904 cmdarg_err("%s", err_str);
1908 if (caps->data_link_types == NULL) {
1909 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1912 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1913 free_if_capabilities(caps);
1918 if (print_packet_info) {
1919 if (!write_preamble(NULL)) {
1920 show_print_file_io_error(errno);
1923 } else if (!quiet) {
1925 * We're not printing information for each packet, and the user
1926 * didn't ask us not to print a count of packets as they arrive,
1927 * so print that count so the user knows that packets are arriving.
1929 * XXX - what if the user wants to do a live capture, doesn't want
1930 * to save it to a file, doesn't want information printed for each
1931 * packet, does want some "-z" statistic, and wants packet counts
1932 * so they know whether they're seeing any packets?
1934 print_packet_counts = TRUE;
1937 /* For now, assume libpcap gives microsecond precision. */
1938 timestamp_set_precision(TS_PREC_AUTO_USEC);
1941 * XXX - this returns FALSE if an error occurred, but it also
1942 * returns FALSE if the capture stops because a time limit
1943 * was reached (and possibly other limits), so we can't assume
1944 * it means an error.
1946 * The capture code is a bit twisty, so it doesn't appear to
1947 * be an easy fix. We just ignore the return value for now.
1948 * Instead, pass on the exit status from the capture child.
1951 exit_status = global_capture_opts.fork_child_status;
1953 if (print_packet_info) {
1954 if (!write_finale()) {
1956 show_print_file_io_error(err);
1960 /* No - complain. */
1961 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1968 if (cfile.frames != NULL) {
1969 free_frame_data_sequence(cfile.frames);
1970 cfile.frames = NULL;
1973 draw_tap_listeners(TRUE);
1974 funnel_dump_all_text_windows();
1977 output_fields_free(output_fields);
1978 output_fields = NULL;
1983 /*#define USE_BROKEN_G_MAIN_LOOP*/
1985 #ifdef USE_BROKEN_G_MAIN_LOOP
1988 gboolean loop_running = FALSE;
1990 guint32 packet_count = 0;
1993 /* XXX - move to the right position / file */
1994 /* read from a pipe (callback) */
1995 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1997 typedef struct pipe_input_tag {
2001 pipe_input_cb_t input_cb;
2002 guint pipe_input_id;
2004 GMutex *callback_running;
2008 static pipe_input_t pipe_input;
2011 /* The timer has expired, see if there's stuff to read from the pipe,
2012 if so, do the callback */
2014 pipe_timer_cb(gpointer data)
2020 pipe_input_t *pipe_input_p = data;
2021 gint iterations = 0;
2023 g_mutex_lock (pipe_input_p->callback_running);
2025 /* try to read data from the pipe only 5 times, to avoid blocking */
2026 while(iterations < 5) {
2027 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2029 /* Oddly enough although Named pipes don't work on win9x,
2030 PeekNamedPipe does !!! */
2031 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2032 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2034 /* Get the child process exit status */
2035 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2038 /* If the Peek returned an error, or there are bytes to be read
2039 or the childwatcher thread has terminated then call the normal
2041 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2043 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2045 /* And call the real handler */
2046 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2047 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2048 /* pipe closed, return false so that the timer is stopped */
2049 g_mutex_unlock (pipe_input_p->callback_running);
2054 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2055 /* No data, stop now */
2062 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2064 g_mutex_unlock (pipe_input_p->callback_running);
2066 /* we didn't stopped the timer, so let it run */
2073 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2076 pipe_input.source = source;
2077 pipe_input.child_process = child_process;
2078 pipe_input.user_data = user_data;
2079 pipe_input.input_cb = input_cb;
2082 #if GLIB_CHECK_VERSION(2,31,0)
2083 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2084 g_mutex_init(pipe_input.callback_running);
2086 pipe_input.callback_running = g_mutex_new();
2088 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2089 do this but that doesn't cover all win32 platforms. GTK can do
2090 this but doesn't seem to work over processes. Attempt to do
2091 something similar here, start a timer and check for data on every
2093 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2094 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2105 GString *str = g_string_new("");
2106 #ifdef USE_TSHARK_SELECT
2110 struct sigaction action, oldaction;
2114 * XXX - dropping privileges is still required, until code cleanup is done
2116 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2117 * when it's done, we don't need special privileges to run tshark at all,
2118 * therefore we don't need to drop these privileges
2119 * The only thing we might want to keep is a warning if tshark is run as root,
2120 * as it's no longer necessary and potentially dangerous.
2122 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2123 * We've opened the capture device, so we shouldn't need any special
2124 * privileges any more; relinquish those privileges.
2126 * XXX - if we have saved set-user-ID support, we should give up those
2127 * privileges immediately, and then reclaim them long enough to get
2128 * a list of network interfaces and to open one, and then give them
2129 * up again, so that stuff we do while processing the argument list,
2130 * reading the user's preferences, loading and starting plugins
2131 * (especially *user* plugins), etc. is done with the user's privileges,
2132 * not special privileges.
2134 relinquish_special_privs_perm();
2135 print_current_user();
2137 /* Cleanup all data structures used for dissection. */
2138 cleanup_dissection();
2139 /* Initialize all data structures used for dissection. */
2143 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2144 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2146 /* Catch SIGINT and SIGTERM and, if we get either of them,
2147 clean up and exit. If SIGHUP isn't being ignored, catch
2148 it too and, if we get it, clean up and exit.
2150 We restart any read that was in progress, so that it doesn't
2151 disrupt reading from the sync pipe. The signal handler tells
2152 the capture child to finish; it will report that it finished,
2153 or will exit abnormally, so we'll stop reading from the sync
2154 pipe, pick up the exit status, and quit. */
2155 memset(&action, 0, sizeof(action));
2156 action.sa_handler = capture_cleanup;
2157 action.sa_flags = SA_RESTART;
2158 sigemptyset(&action.sa_mask);
2159 sigaction(SIGTERM, &action, NULL);
2160 sigaction(SIGINT, &action, NULL);
2161 sigaction(SIGHUP, NULL, &oldaction);
2162 if (oldaction.sa_handler == SIG_DFL)
2163 sigaction(SIGHUP, &action, NULL);
2166 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2167 quiet mode, report the number of packets we've captured.
2169 Again, restart any read that was in progress, so that it doesn't
2170 disrupt reading from the sync pipe. */
2171 action.sa_handler = report_counts_siginfo;
2172 action.sa_flags = SA_RESTART;
2173 sigemptyset(&action.sa_mask);
2174 sigaction(SIGINFO, &action, NULL);
2175 #endif /* SIGINFO */
2178 global_capture_opts.state = CAPTURE_PREPARING;
2180 /* Let the user know which interfaces were chosen. */
2181 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2182 interface_options interface_opts;
2184 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2185 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2186 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2187 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2190 if (global_capture_opts.ifaces->len < 2) {
2192 if (global_capture_opts.ifaces->len < 4) {
2194 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2195 interface_options interface_opts;
2197 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2199 if (global_capture_opts.ifaces->len > 2) {
2200 g_string_append_printf(str, ",");
2202 g_string_append_printf(str, " ");
2203 if (i == global_capture_opts.ifaces->len - 1) {
2204 g_string_append_printf(str, "and ");
2207 g_string_append_printf(str, "'%s'", interface_opts.descr);
2210 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2212 fprintf(stderr, "Capturing on %s\n", str->str);
2214 g_string_free(str, TRUE);
2216 ret = sync_pipe_start(&global_capture_opts);
2221 /* the actual capture loop
2223 * XXX - glib doesn't seem to provide any event based loop handling.
2225 * XXX - for whatever reason,
2226 * calling g_main_loop_new() ends up in 100% cpu load.
2228 * But that doesn't matter: in UNIX we can use select() to find an input
2229 * source with something to do.
2231 * But that doesn't matter because we're in a CLI (that doesn't need to
2232 * update a GUI or something at the same time) so it's OK if we block
2233 * trying to read from the pipe.
2235 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2236 * wrong (but I leave it there in case I am...).
2239 #ifdef USE_TSHARK_SELECT
2241 FD_SET(pipe_input.source, &readfds);
2244 loop_running = TRUE;
2248 while (loop_running)
2250 #ifdef USE_TSHARK_SELECT
2251 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2257 } else if (ret == 1) {
2259 /* Call the real handler */
2260 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2261 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2264 #ifdef USE_TSHARK_SELECT
2269 CATCH(OutOfMemoryError) {
2273 "Sorry, but TShark has to terminate now!\n"
2275 "Some infos / workarounds can be found at:\n"
2276 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2284 /* XXX - move the call to main_window_update() out of capture_sync.c */
2285 /* dummy for capture_sync.c to make linker happy */
2286 void main_window_update(void)
2290 /* capture child detected an error */
2292 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2294 cmdarg_err("%s", error_msg);
2295 cmdarg_err_cont("%s", secondary_error_msg);
2299 /* capture child detected an capture filter related error */
2301 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2303 dfilter_t *rfcode = NULL;
2304 interface_options interface_opts;
2306 g_assert(i < capture_opts->ifaces->len);
2307 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2309 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2311 "Invalid capture filter \"%s\" for interface %s!\n"
2313 "That string looks like a valid display filter; however, it isn't a valid\n"
2314 "capture filter (%s).\n"
2316 "Note that display filters and capture filters don't have the same syntax,\n"
2317 "so you can't use most display filter expressions as capture filters.\n"
2319 "See the User's Guide for a description of the capture filter syntax.",
2320 interface_opts.cfilter, interface_opts.descr, error_message);
2321 dfilter_free(rfcode);
2324 "Invalid capture filter \"%s\" for interface %s!\n"
2326 "That string isn't a valid capture filter (%s).\n"
2327 "See the User's Guide for a description of the capture filter syntax.",
2328 interface_opts.cfilter, interface_opts.descr, error_message);
2333 /* capture child tells us we have a new (or the first) capture file */
2335 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2337 gboolean is_tempfile;
2340 if (capture_opts->state == CAPTURE_PREPARING) {
2341 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2343 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2345 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2347 /* free the old filename */
2348 if (capture_opts->save_file != NULL) {
2350 /* we start a new capture file, close the old one (if we had one before) */
2351 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2352 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2353 wtap_close(((capture_file *) capture_opts->cf)->wth);
2355 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2358 g_free(capture_opts->save_file);
2359 is_tempfile = FALSE;
2361 /* we didn't had a save_file before, must be a tempfile */
2365 /* save the new filename */
2366 capture_opts->save_file = g_strdup(new_file);
2368 /* if we are in real-time mode, open the new file now */
2369 if (do_dissection) {
2370 /* Attempt to open the capture file and set up to read from it. */
2371 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2375 /* Don't unlink (delete) the save file - leave it around,
2376 for debugging purposes. */
2377 g_free(capture_opts->save_file);
2378 capture_opts->save_file = NULL;
2383 capture_opts->state = CAPTURE_RUNNING;
2389 /* capture child tells us we have new packets to read */
2391 capture_input_new_packets(capture_options *capture_opts, int to_read)
2397 capture_file *cf = capture_opts->cf;
2398 gboolean filtering_tap_listeners;
2403 * Prevent a SIGINFO handler from writing to the standard error while
2404 * we're doing so or writing to the standard output; instead, have it
2405 * just set a flag telling us to print that information when we're done.
2408 #endif /* SIGINFO */
2410 /* Do we have any tap listeners with filters? */
2411 filtering_tap_listeners = have_filtering_tap_listeners();
2413 /* Get the union of the flags for all tap listeners. */
2414 tap_flags = union_of_tap_listener_flags();
2416 if (do_dissection) {
2417 while (to_read-- && cf->wth) {
2418 wtap_cleareof(cf->wth);
2419 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2421 /* read from file failed, tell the capture child to stop */
2422 sync_pipe_stop(capture_opts);
2423 wtap_close(cf->wth);
2426 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2427 wtap_buf_ptr(cf->wth),
2428 filtering_tap_listeners, tap_flags);
2431 /* packet successfully read and gone through the "Read Filter" */
2437 * Dumpcap's doing all the work; we're not doing any dissection.
2438 * Count all the packets it wrote.
2440 packet_count += to_read;
2443 if (print_packet_counts) {
2444 /* We're printing packet counts. */
2445 if (packet_count != 0) {
2446 fprintf(stderr, "\r%u ", packet_count);
2447 /* stderr could be line buffered */
2454 * Allow SIGINFO handlers to write.
2459 * If a SIGINFO handler asked us to write out capture counts, do so.
2463 #endif /* SIGINFO */
2469 if (!print_packet_counts) {
2470 /* Report the count only if we aren't printing a packet count
2471 as packets arrive. */
2472 fprintf(stderr, "%u packet%s captured\n", packet_count,
2473 plurality(packet_count, "", "s"));
2476 infoprint = FALSE; /* we just reported it */
2477 #endif /* SIGINFO */
2482 report_counts_siginfo(int signum _U_)
2484 int sav_errno = errno;
2485 /* If we've been told to delay printing, just set a flag asking
2486 that we print counts (if we're supposed to), otherwise print
2487 the count of packets captured (if we're supposed to). */
2494 #endif /* SIGINFO */
2497 /* capture child detected any packet drops? */
2499 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2501 if (print_packet_counts) {
2502 /* We're printing packet counts to stderr.
2503 Send a newline so that we move to the line after the packet count. */
2504 fprintf(stderr, "\n");
2508 /* We're printing packet counts to stderr.
2509 Send a newline so that we move to the line after the packet count. */
2510 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2516 * Capture child closed its side of the pipe, report any error and
2517 * do the required cleanup.
2520 capture_input_closed(capture_options *capture_opts, gchar *msg)
2522 capture_file *cf = (capture_file *) capture_opts->cf;
2525 fprintf(stderr, "tshark: %s\n", msg);
2529 if (cf != NULL && cf->wth != NULL) {
2530 wtap_close(cf->wth);
2531 if (cf->is_tempfile) {
2532 ws_unlink(cf->filename);
2535 #ifdef USE_BROKEN_G_MAIN_LOOP
2536 /*g_main_loop_quit(loop);*/
2539 loop_running = FALSE;
2548 capture_cleanup(DWORD ctrltype _U_)
2550 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2551 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2552 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2553 like SIGTERM at least when the machine's shutting down.
2555 For now, we handle them all as indications that we should clean up
2556 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2559 We must return TRUE so that no other handler - such as one that would
2560 terminate the process - gets called.
2562 XXX - for some reason, typing ^C to TShark, if you run this in
2563 a Cygwin console window in at least some versions of Cygwin,
2564 causes TShark to terminate immediately; this routine gets
2565 called, but the main loop doesn't get a chance to run and
2566 exit cleanly, at least if this is compiled with Microsoft Visual
2567 C++ (i.e., it's a property of the Cygwin console window or Bash;
2568 it happens if TShark is not built with Cygwin - for all I know,
2569 building it with Cygwin may make the problem go away). */
2571 /* tell the capture child to stop */
2572 sync_pipe_stop(&global_capture_opts);
2574 /* don't stop our own loop already here, otherwise status messages and
2575 * cleanup wouldn't be done properly. The child will indicate the stop of
2576 * everything by calling capture_input_closed() later */
2582 capture_cleanup(int signum _U_)
2584 /* tell the capture child to stop */
2585 sync_pipe_stop(&global_capture_opts);
2587 /* don't stop our own loop already here, otherwise status messages and
2588 * cleanup wouldn't be done properly. The child will indicate the stop of
2589 * everything by calling capture_input_closed() later */
2592 #endif /* HAVE_LIBPCAP */
2595 process_packet_first_pass(capture_file *cf,
2596 gint64 offset, struct wtap_pkthdr *whdr,
2601 gboolean create_proto_tree = FALSE;
2605 /* The frame number of this packet is one more than the count of
2606 frames in this packet. */
2607 framenum = cf->count + 1;
2609 /* If we're not running a display filter and we're not printing any
2610 packet information, we don't need to do a dissection. This means
2611 that all packets can be marked as 'passed'. */
2614 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2616 /* If we're going to print packet information, or we're going to
2617 run a read filter, or we're going to process taps, set up to
2618 do a dissection and do so. */
2619 if (do_dissection) {
2620 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2621 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2622 /* Grab any resolved addresses */
2623 host_name_lookup_process();
2625 /* If we're going to be applying a read filter, we'll need to
2626 create a protocol tree against which to apply the filter. */
2628 create_proto_tree = TRUE;
2630 /* We're not going to display the protocol tree on this pass,
2631 so it's not going to be "visible". */
2632 epan_dissect_init(&edt, create_proto_tree, FALSE);
2634 /* If we're running a read filter, prime the epan_dissect_t with that
2637 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2639 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2640 &first_ts, prev_dis, prev_cap);
2642 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2644 /* Run the read filter if we have one. */
2646 passed = dfilter_apply_edt(cf->rfcode, &edt);
2650 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2651 prev_dis_frame = fdlocal;
2652 prev_dis = &prev_dis_frame;
2653 frame_data_sequence_add(cf->frames, &fdlocal);
2657 prev_cap_frame = fdlocal;
2658 prev_cap = &prev_cap_frame;
2661 epan_dissect_cleanup(&edt);
2667 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2668 struct wtap_pkthdr *phdr, const guchar *pd,
2669 gboolean filtering_tap_listeners, guint tap_flags)
2671 gboolean create_proto_tree;
2676 /* If we're not running a display filter and we're not printing any
2677 packet information, we don't need to do a dissection. This means
2678 that all packets can be marked as 'passed'. */
2681 /* If we're going to print packet information, or we're going to
2682 run a read filter, or we're going to process taps, set up to
2683 do a dissection and do so. */
2684 if (do_dissection) {
2685 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2686 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2687 /* Grab any resolved addresses */
2688 host_name_lookup_process();
2690 if (cf->rfcode || print_details || filtering_tap_listeners ||
2691 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2692 create_proto_tree = TRUE;
2694 create_proto_tree = FALSE;
2696 /* The protocol tree will be "visible", i.e., printed, only if we're
2697 printing packet details, which is true if we're printing stuff
2698 ("print_packet_info" is true) and we're in verbose mode
2699 ("packet_details" is true). */
2700 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2702 /* If we're running a read filter, prime the epan_dissect_t with that
2705 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2707 col_custom_prime_edt(&edt, &cf->cinfo);
2709 /* We only need the columns if either
2710 1) some tap needs the columns
2712 2) we're printing packet info but we're *not* verbose; in verbose
2713 mode, we print the protocol tree, not the protocol summary.
2715 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2720 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2722 /* Run the read filter if we have one. */
2724 passed = dfilter_apply_edt(cf->rfcode, &edt);
2728 /* Process this packet. */
2729 if (print_packet_info) {
2730 /* We're printing packet information; print the information for
2733 print_packet(cf, &edt);
2735 print_packet(cf, NULL);
2737 /* The ANSI C standard does not appear to *require* that a line-buffered
2738 stream be flushed to the host environment whenever a newline is
2739 written, it just says that, on such a stream, characters "are
2740 intended to be transmitted to or from the host environment as a
2741 block when a new-line character is encountered".
2743 The Visual C++ 6.0 C implementation doesn't do what is intended;
2744 even if you set a stream to be line-buffered, it still doesn't
2745 flush the buffer at the end of every line.
2747 So, if the "-l" flag was specified, we flush the standard output
2748 at the end of a packet. This will do the right thing if we're
2749 printing packet summary lines, and, as we print the entire protocol
2750 tree for a single packet without waiting for anything to happen,
2751 it should be as good as line-buffered mode if we're printing
2752 protocol trees. (The whole reason for the "-l" flag in either
2753 tcpdump or TShark is to allow the output of a live capture to
2754 be piped to a program or script and to have that script see the
2755 information for the packet as soon as it's printed, rather than
2756 having to wait until a standard I/O buffer fills up. */
2760 if (ferror(stdout)) {
2761 show_print_file_io_error(errno);
2767 if (do_dissection) {
2768 epan_dissect_cleanup(&edt);
2774 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2775 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2778 int snapshot_length;
2782 gchar *err_info = NULL;
2784 char *save_file_string = NULL;
2785 gboolean filtering_tap_listeners;
2787 wtapng_section_t *shb_hdr;
2788 wtapng_iface_descriptions_t *idb_inf;
2791 shb_hdr = wtap_file_get_shb_info(cf->wth);
2792 idb_inf = wtap_file_get_idb_info(cf->wth);
2793 #ifdef PCAP_NG_DEFAULT
2794 if (idb_inf->number_of_interfaces > 0) {
2795 linktype = WTAP_ENCAP_PER_PACKET;
2797 linktype = wtap_file_encap(cf->wth);
2800 linktype = wtap_file_encap(cf->wth);
2802 if (save_file != NULL) {
2803 /* Get a string that describes what we're writing to */
2804 save_file_string = output_file_description(save_file);
2806 /* Set up to write to the capture file. */
2807 snapshot_length = wtap_snapshot_length(cf->wth);
2808 if (snapshot_length == 0) {
2809 /* Snapshot length of input file not known. */
2810 snapshot_length = WTAP_MAX_PACKET_SIZE;
2812 /* If we don't have an application name add Tshark */
2813 if (shb_hdr->shb_user_appl == NULL) {
2814 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2815 shb_hdr->shb_user_appl = appname;
2818 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2819 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2825 /* We couldn't set up to write to the capture file. */
2828 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2829 cmdarg_err("Capture files can't be written in that format.");
2832 case WTAP_ERR_UNSUPPORTED_ENCAP:
2833 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2834 cmdarg_err("The capture file being read can't be written as a "
2835 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2838 case WTAP_ERR_CANT_OPEN:
2839 cmdarg_err("The %s couldn't be created for some "
2840 "unknown reason.", save_file_string);
2843 case WTAP_ERR_SHORT_WRITE:
2844 cmdarg_err("A full header couldn't be written to the %s.",
2849 cmdarg_err("The %s could not be created: %s.", save_file_string,
2850 wtap_strerror(err));
2856 if (print_packet_info) {
2857 if (!write_preamble(cf)) {
2859 show_print_file_io_error(err);
2866 if (pdh && out_file_name_res) {
2867 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2868 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2869 wtap_file_type_short_string(out_file_type));
2873 /* Do we have any tap listeners with filters? */
2874 filtering_tap_listeners = have_filtering_tap_listeners();
2876 /* Get the union of the flags for all tap listeners. */
2877 tap_flags = union_of_tap_listener_flags();
2879 if (perform_two_pass_analysis) {
2881 int old_max_packet_count = max_packet_count;
2883 /* Allocate a frame_data_sequence for all the frames. */
2884 cf->frames = new_frame_data_sequence();
2886 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2887 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2888 wtap_buf_ptr(cf->wth))) {
2889 /* Stop reading if we have the maximum number of packets;
2890 * When the -c option has not been used, max_packet_count
2891 * starts at 0, which practically means, never stop reading.
2892 * (unless we roll over max_packet_count ?)
2894 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2895 err = 0; /* This is not an error */
2901 /* Close the sequential I/O side, to free up memory it requires. */
2902 wtap_sequential_close(cf->wth);
2904 /* Allow the protocol dissectors to free up memory that they
2905 * don't need after the sequential run-through of the packets. */
2906 postseq_cleanup_all_protocols();
2908 max_packet_count = old_max_packet_count;
2910 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2911 fdata = frame_data_sequence_find(cf->frames, framenum);
2912 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2913 cf->pd, fdata->cap_len, &err, &err_info)) {
2914 if (process_packet_second_pass(cf, fdata,
2916 filtering_tap_listeners, tap_flags)) {
2917 /* Either there's no read filtering or this packet passed the
2918 filter, so, if we're writing to a capture file, write
2921 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2922 /* Error writing to a capture file */
2925 case WTAP_ERR_UNSUPPORTED_ENCAP:
2927 * This is a problem with the particular frame we're writing;
2928 * note that, and give the frame number.
2930 * XXX - framenum is not necessarily the frame number in
2931 * the input file if there was a read filter.
2934 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2935 framenum, cf->filename,
2936 wtap_file_type_short_string(out_file_type));
2940 show_capture_file_io_error(save_file, err, FALSE);
2943 wtap_dump_close(pdh, &err);
2948 /* Stop reading if we have the maximum number of packets;
2949 * When the -c option has not been used, max_packet_count
2950 * starts at 0, which practically means, never stop reading.
2951 * (unless we roll over max_packet_count ?)
2953 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2954 err = 0; /* This is not an error */
2963 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2966 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2967 wtap_buf_ptr(cf->wth),
2968 filtering_tap_listeners, tap_flags)) {
2969 /* Either there's no read filtering or this packet passed the
2970 filter, so, if we're writing to a capture file, write
2973 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2974 /* Error writing to a capture file */
2977 case WTAP_ERR_UNSUPPORTED_ENCAP:
2979 * This is a problem with the particular frame we're writing;
2980 * note that, and give the frame number.
2983 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2984 framenum, cf->filename,
2985 wtap_file_type_short_string(out_file_type));
2989 show_capture_file_io_error(save_file, err, FALSE);
2992 wtap_dump_close(pdh, &err);
2997 /* Stop reading if we have the maximum number of packets;
2998 * When the -c option has not been used, max_packet_count
2999 * starts at 0, which practically means, never stop reading.
3000 * (unless we roll over max_packet_count ?)
3002 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3003 err = 0; /* This is not an error */
3012 * Print a message noting that the read failed somewhere along the line.
3014 * If we're printing packet data, and the standard output and error are
3015 * going to the same place, flush the standard output, so everything
3016 * buffered up is written, and then print a newline to the standard error
3017 * before printing the error message, to separate it from the packet
3018 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3019 * the _fstat() documentation at Microsoft doesn't indicate whether
3020 * st_ino is even supported.)
3023 if (print_packet_info) {
3024 struct stat stat_stdout, stat_stderr;
3026 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3027 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3028 stat_stdout.st_ino == stat_stderr.st_ino) {
3030 fprintf(stderr, "\n");
3037 case WTAP_ERR_UNSUPPORTED:
3038 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3039 cf->filename, err_info);
3043 case WTAP_ERR_UNSUPPORTED_ENCAP:
3044 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3045 cf->filename, err_info);
3049 case WTAP_ERR_CANT_READ:
3050 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3054 case WTAP_ERR_SHORT_READ:
3055 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3059 case WTAP_ERR_BAD_FILE:
3060 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3061 cf->filename, err_info);
3065 case WTAP_ERR_DECOMPRESS:
3066 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3067 "(%s)", cf->filename, err_info);
3071 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3072 cf->filename, wtap_strerror(err));
3075 if (save_file != NULL) {
3076 /* Now close the capture file. */
3077 if (!wtap_dump_close(pdh, &err))
3078 show_capture_file_io_error(save_file, err, TRUE);
3081 if (save_file != NULL) {
3082 /* Now close the capture file. */
3083 if (!wtap_dump_close(pdh, &err))
3084 show_capture_file_io_error(save_file, err, TRUE);
3086 if (print_packet_info) {
3087 if (!write_finale()) {
3089 show_print_file_io_error(err);
3096 wtap_close(cf->wth);
3099 g_free(save_file_string);
3106 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3108 gboolean filtering_tap_listeners, guint tap_flags)
3111 gboolean create_proto_tree;
3116 /* Count this packet. */
3119 /* If we're not running a display filter and we're not printing any
3120 packet information, we don't need to do a dissection. This means
3121 that all packets can be marked as 'passed'. */
3124 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3126 /* If we're going to print packet information, or we're going to
3127 run a read filter, or we're going to process taps, set up to
3128 do a dissection and do so. */
3129 if (do_dissection) {
3130 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3131 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3132 /* Grab any resolved addresses */
3133 host_name_lookup_process();
3135 if (cf->rfcode || print_details || filtering_tap_listeners ||
3136 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3137 create_proto_tree = TRUE;
3139 create_proto_tree = FALSE;
3141 /* The protocol tree will be "visible", i.e., printed, only if we're
3142 printing packet details, which is true if we're printing stuff
3143 ("print_packet_info" is true) and we're in verbose mode
3144 ("packet_details" is true). */
3145 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3147 /* If we're running a read filter, prime the epan_dissect_t with that
3150 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3152 col_custom_prime_edt(&edt, &cf->cinfo);
3154 /* We only need the columns if either
3155 1) some tap needs the columns
3157 2) we're printing packet info but we're *not* verbose; in verbose
3158 mode, we print the protocol tree, not the protocol summary. */
3159 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
3164 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3165 &first_ts, prev_dis, prev_cap);
3167 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3169 /* Run the read filter if we have one. */
3171 passed = dfilter_apply_edt(cf->rfcode, &edt);
3175 frame_data_set_after_dissect(&fdata, &cum_bytes);
3176 prev_dis_frame = fdata;
3177 prev_dis = &prev_dis_frame;
3179 /* Process this packet. */
3180 if (print_packet_info) {
3181 /* We're printing packet information; print the information for
3184 print_packet(cf, &edt);
3186 print_packet(cf, NULL);
3188 /* The ANSI C standard does not appear to *require* that a line-buffered
3189 stream be flushed to the host environment whenever a newline is
3190 written, it just says that, on such a stream, characters "are
3191 intended to be transmitted to or from the host environment as a
3192 block when a new-line character is encountered".
3194 The Visual C++ 6.0 C implementation doesn't do what is intended;
3195 even if you set a stream to be line-buffered, it still doesn't
3196 flush the buffer at the end of every line.
3198 So, if the "-l" flag was specified, we flush the standard output
3199 at the end of a packet. This will do the right thing if we're
3200 printing packet summary lines, and, as we print the entire protocol
3201 tree for a single packet without waiting for anything to happen,
3202 it should be as good as line-buffered mode if we're printing
3203 protocol trees. (The whole reason for the "-l" flag in either
3204 tcpdump or TShark is to allow the output of a live capture to
3205 be piped to a program or script and to have that script see the
3206 information for the packet as soon as it's printed, rather than
3207 having to wait until a standard I/O buffer fills up. */
3211 if (ferror(stdout)) {
3212 show_print_file_io_error(errno);
3218 prev_cap_frame = fdata;
3219 prev_cap = &prev_cap_frame;
3221 if (do_dissection) {
3222 epan_dissect_cleanup(&edt);
3223 frame_data_cleanup(&fdata);
3229 write_preamble(capture_file *cf)
3231 switch (output_action) {
3234 return print_preamble(print_stream, cf ? cf->filename : NULL);
3238 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3240 write_psml_preamble(stdout);
3241 return !ferror(stdout);
3244 write_fields_preamble(output_fields, stdout);
3245 return !ferror(stdout);
3248 g_assert_not_reached();
3254 get_line_buf(size_t len)
3256 static char *line_bufp = NULL;
3257 static size_t line_buf_len = 256;
3258 size_t new_line_buf_len;
3260 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3261 new_line_buf_len *= 2)
3263 if (line_bufp == NULL) {
3264 line_buf_len = new_line_buf_len;
3265 line_bufp = g_malloc(line_buf_len + 1);
3267 if (new_line_buf_len > line_buf_len) {
3268 line_buf_len = new_line_buf_len;
3269 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3276 print_columns(capture_file *cf)
3283 line_bufp = get_line_buf(256);
3286 for (i = 0; i < cf->cinfo.num_cols; i++) {
3287 /* Skip columns not marked as visible. */
3288 if (!get_column_visible(i))
3290 switch (cf->cinfo.col_fmt[i]) {
3294 * Don't print this if we're doing a live capture from a network
3295 * interface - if we're doing a live capture, you won't be
3296 * able to look at the capture in the future (it's not being
3297 * saved anywhere), so the frame numbers are unlikely to be
3300 * (XXX - it might be nice to be able to save and print at
3301 * the same time, sort of like an "Update list of packets
3302 * in real time" capture in Wireshark.)
3304 if (global_capture_opts.ifaces->len > 0)
3307 column_len = strlen(cf->cinfo.col_data[i]);
3310 line_bufp = get_line_buf(buf_offset + column_len);
3311 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3317 case COL_ABS_DATE_TIME:
3319 case COL_UTC_DATE_TIME: /* XXX - wider */
3320 column_len = strlen(cf->cinfo.col_data[i]);
3321 if (column_len < 10)
3323 line_bufp = get_line_buf(buf_offset + column_len);
3324 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3330 case COL_DEF_DL_SRC:
3331 case COL_RES_DL_SRC:
3332 case COL_UNRES_DL_SRC:
3333 case COL_DEF_NET_SRC:
3334 case COL_RES_NET_SRC:
3335 case COL_UNRES_NET_SRC:
3336 column_len = strlen(cf->cinfo.col_data[i]);
3337 if (column_len < 12)
3339 line_bufp = get_line_buf(buf_offset + column_len);
3340 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3346 case COL_DEF_DL_DST:
3347 case COL_RES_DL_DST:
3348 case COL_UNRES_DL_DST:
3349 case COL_DEF_NET_DST:
3350 case COL_RES_NET_DST:
3351 case COL_UNRES_NET_DST:
3352 column_len = strlen(cf->cinfo.col_data[i]);
3353 if (column_len < 12)
3355 line_bufp = get_line_buf(buf_offset + column_len);
3356 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3360 column_len = strlen(cf->cinfo.col_data[i]);
3361 line_bufp = get_line_buf(buf_offset + column_len);
3362 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3365 buf_offset += column_len;
3366 if (i != cf->cinfo.num_cols - 1) {
3368 * This isn't the last column, so we need to print a
3369 * separator between this column and the next.
3371 * If we printed a network source and are printing a
3372 * network destination of the same type next, separate
3373 * them with " -> "; if we printed a network destination
3374 * and are printing a network source of the same type
3375 * next, separate them with " <- "; otherwise separate them
3378 * We add enough space to the buffer for " <- " or " -> ",
3379 * even if we're only adding " ".
3381 line_bufp = get_line_buf(buf_offset + 4);
3382 switch (cf->cinfo.col_fmt[i]) {
3387 switch (cf->cinfo.col_fmt[i + 1]) {
3392 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3397 g_strlcat(line_bufp + buf_offset, " ", 5);
3403 case COL_DEF_DL_SRC:
3404 case COL_RES_DL_SRC:
3405 case COL_UNRES_DL_SRC:
3406 switch (cf->cinfo.col_fmt[i + 1]) {
3408 case COL_DEF_DL_DST:
3409 case COL_RES_DL_DST:
3410 case COL_UNRES_DL_DST:
3411 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3416 g_strlcat(line_bufp + buf_offset, " ", 5);
3422 case COL_DEF_NET_SRC:
3423 case COL_RES_NET_SRC:
3424 case COL_UNRES_NET_SRC:
3425 switch (cf->cinfo.col_fmt[i + 1]) {
3427 case COL_DEF_NET_DST:
3428 case COL_RES_NET_DST:
3429 case COL_UNRES_NET_DST:
3430 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3435 g_strlcat(line_bufp + buf_offset, " ", 5);
3444 switch (cf->cinfo.col_fmt[i + 1]) {
3449 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3454 g_strlcat(line_bufp + buf_offset, " ", 5);
3460 case COL_DEF_DL_DST:
3461 case COL_RES_DL_DST:
3462 case COL_UNRES_DL_DST:
3463 switch (cf->cinfo.col_fmt[i + 1]) {
3465 case COL_DEF_DL_SRC:
3466 case COL_RES_DL_SRC:
3467 case COL_UNRES_DL_SRC:
3468 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3473 g_strlcat(line_bufp + buf_offset, " ", 5);
3479 case COL_DEF_NET_DST:
3480 case COL_RES_NET_DST:
3481 case COL_UNRES_NET_DST:
3482 switch (cf->cinfo.col_fmt[i + 1]) {
3484 case COL_DEF_NET_SRC:
3485 case COL_RES_NET_SRC:
3486 case COL_UNRES_NET_SRC:
3487 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3492 g_strlcat(line_bufp + buf_offset, " ", 5);
3499 g_strlcat(line_bufp + buf_offset, " ", 5);
3505 return print_line(print_stream, 0, line_bufp);
3509 print_packet(capture_file *cf, epan_dissect_t *edt)
3511 print_args_t print_args;
3513 if (print_summary) {
3514 /* Just fill in the columns. */
3515 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3517 /* Now print them. */
3518 switch (output_action) {
3521 if (!print_columns(cf))
3526 proto_tree_write_psml(edt, stdout);
3527 return !ferror(stdout);
3528 case WRITE_FIELDS: /*No non-verbose "fields" format */
3529 g_assert_not_reached();
3533 if (print_details) {
3534 /* Print the information in the protocol tree. */
3535 switch (output_action) {
3538 /* Only initialize the fields that are actually used in proto_tree_print.
3539 * This is particularly important for .range, as that's heap memory which
3540 * we would otherwise have to g_free().
3541 print_args.to_file = TRUE;
3542 print_args.format = print_format;
3543 print_args.print_summary = print_summary;
3544 print_args.print_formfeed = FALSE;
3545 packet_range_init(&print_args.range, &cfile);
3547 print_args.print_hex = print_hex;
3548 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3550 if (!proto_tree_print(&print_args, edt, print_stream))
3553 if (!print_line(print_stream, 0, separator))
3559 proto_tree_write_pdml(edt, stdout);
3561 return !ferror(stdout);
3563 proto_tree_write_fields(output_fields, edt, stdout);
3565 return !ferror(stdout);
3569 if (print_summary || print_details) {
3570 if (!print_line(print_stream, 0, ""))
3573 if (!print_hex_data(print_stream, edt))
3575 if (!print_line(print_stream, 0, separator))
3584 switch (output_action) {
3587 return print_finale(print_stream);
3591 write_pdml_finale(stdout);
3593 write_psml_finale(stdout);
3594 return !ferror(stdout);
3597 write_fields_finale(output_fields, stdout);
3598 return !ferror(stdout);
3601 g_assert_not_reached();
3607 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3611 char err_msg[2048+1];
3613 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3617 /* The open succeeded. Fill in the information for this file. */
3619 /* Cleanup all data structures used for dissection. */
3620 cleanup_dissection();
3621 /* Initialize all data structures used for dissection. */
3625 cf->f_datalen = 0; /* not used, but set it anyway */
3627 /* Set the file name because we need it to set the follow stream filter.
3628 XXX - is that still true? We need it for other reasons, though,
3630 cf->filename = g_strdup(fname);
3632 /* Indicate whether it's a permanent or temporary file. */
3633 cf->is_tempfile = is_tempfile;
3635 /* No user changes yet. */
3636 cf->unsaved_changes = FALSE;
3638 cf->cd_t = wtap_file_type(cf->wth);
3640 cf->drops_known = FALSE;
3642 cf->snap = wtap_snapshot_length(cf->wth);
3643 if (cf->snap == 0) {
3644 /* Snapshot length not known. */
3645 cf->has_snap = FALSE;
3646 cf->snap = WTAP_MAX_PACKET_SIZE;
3648 cf->has_snap = TRUE;
3649 nstime_set_zero(&cf->elapsed_time);
3650 nstime_set_unset(&first_ts);
3654 cf->state = FILE_READ_IN_PROGRESS;
3656 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3657 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3662 g_snprintf(err_msg, sizeof err_msg,
3663 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3664 cmdarg_err("%s", err_msg);
3669 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3671 char *save_file_string;
3673 save_file_string = output_file_description(fname);
3678 cmdarg_err("Not all the packets could be written to the %s because there is "
3679 "no space left on the file system.",
3685 cmdarg_err("Not all the packets could be written to the %s because you are "
3686 "too close to, or over your disk quota.",
3691 case WTAP_ERR_CANT_CLOSE:
3692 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3696 case WTAP_ERR_SHORT_WRITE:
3697 cmdarg_err("Not all the packets could be written to the %s.",
3703 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3704 wtap_strerror(err));
3706 cmdarg_err("An error occurred while writing to the %s: %s.",
3707 save_file_string, wtap_strerror(err));
3711 g_free(save_file_string);
3715 show_print_file_io_error(int err)
3720 cmdarg_err("Not all the packets could be printed because there is "
3721 "no space left on the file system.");
3726 cmdarg_err("Not all the packets could be printed because you are "
3727 "too close to, or over your disk quota.");
3732 cmdarg_err("An error occurred while printing packets: %s.",
3739 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3743 static char errmsg_errno[1024+1];
3746 /* Wiretap error. */
3749 case WTAP_ERR_NOT_REGULAR_FILE:
3750 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3753 case WTAP_ERR_RANDOM_OPEN_PIPE:
3754 /* Seen only when opening a capture file for reading. */
3755 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3758 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3759 /* Seen only when opening a capture file for reading. */
3760 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3763 case WTAP_ERR_UNSUPPORTED:
3764 /* Seen only when opening a capture file for reading. */
3765 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3766 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3769 errmsg = errmsg_errno;
3772 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3773 /* Seen only when opening a capture file for writing. */
3774 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3775 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3776 "written to a pipe.", wtap_file_type_short_string(file_type));
3777 errmsg = errmsg_errno;
3780 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3781 /* Seen only when opening a capture file for writing. */
3782 errmsg = "TShark doesn't support writing capture files in that format.";
3785 case WTAP_ERR_UNSUPPORTED_ENCAP:
3787 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3788 "TShark can't save this capture as a \"%s\" file.",
3789 wtap_file_type_short_string(file_type));
3791 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3792 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3796 errmsg = errmsg_errno;
3799 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3801 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3802 "TShark can't save this capture as a \"%s\" file.",
3803 wtap_file_type_short_string(file_type));
3804 errmsg = errmsg_errno;
3806 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3809 case WTAP_ERR_BAD_FILE:
3810 /* Seen only when opening a capture file for reading. */
3811 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3812 "The file \"%%s\" appears to be damaged or corrupt.\n"
3815 errmsg = errmsg_errno;
3818 case WTAP_ERR_CANT_OPEN:
3820 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3822 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3825 case WTAP_ERR_SHORT_READ:
3826 errmsg = "The file \"%s\" appears to have been cut short"
3827 " in the middle of a packet or other data.";
3830 case WTAP_ERR_SHORT_WRITE:
3831 errmsg = "A full header couldn't be written to the file \"%s\".";
3834 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3835 errmsg = "This file type cannot be written as a compressed file.";
3838 case WTAP_ERR_DECOMPRESS:
3839 /* Seen only when opening a capture file for reading. */
3840 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3841 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3844 errmsg = errmsg_errno;
3848 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3849 "The file \"%%s\" could not be %s: %s.",
3850 for_writing ? "created" : "opened",
3851 wtap_strerror(err));
3852 errmsg = errmsg_errno;
3856 errmsg = file_open_error_message(err, for_writing);
3861 * Open/create errors are reported with an console message in TShark.
3864 open_failure_message(const char *filename, int err, gboolean for_writing)
3866 fprintf(stderr, "tshark: ");
3867 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3868 fprintf(stderr, "\n");
3873 * General errors are reported with an console message in TShark.
3876 failure_message(const char *msg_format, va_list ap)
3878 fprintf(stderr, "tshark: ");
3879 vfprintf(stderr, msg_format, ap);
3880 fprintf(stderr, "\n");
3884 * Read errors are reported with an console message in TShark.
3887 read_failure_message(const char *filename, int err)
3889 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3890 filename, g_strerror(err));
3894 * Write errors are reported with an console message in TShark.
3897 write_failure_message(const char *filename, int err)
3899 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3900 filename, g_strerror(err));
3904 * Print to the standard error. This is a command-line tool, so there's
3905 * no need to pop up a console.
3908 vfprintf_stderr(const char *fmt, va_list ap)
3910 vfprintf(stderr, fmt, ap);
3914 fprintf_stderr(const char *fmt, ...)
3919 vfprintf_stderr(fmt, ap);
3924 * Report an error in command-line arguments.
3927 cmdarg_err(const char *fmt, ...)
3932 failure_message(fmt, ap);
3937 * Report additional information for an error in command-line arguments.
3940 cmdarg_err_cont(const char *fmt, ...)
3945 vfprintf(stderr, fmt, ap);
3946 fprintf(stderr, "\n");
3952 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3957 * indent-tabs-mode: nil
3960 * vi: set shiftwidth=2 tabstop=8 expandtab:
3961 * :indentSize=2:tabSize=8:noTabs=true: