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;
816 if (started_with_special_privs()) {
817 cur_user = get_cur_username();
818 cur_group = get_cur_groupname();
819 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
820 cur_user, cur_group);
823 if (running_with_special_privs()) {
824 fprintf(stderr, " This could be dangerous.");
826 fprintf(stderr, "\n");
831 check_capture_privs(void) {
834 /* Warn the user if npf.sys isn't loaded. */
835 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
836 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
837 "capturing or\nlisting interfaces.\n");
843 show_version(GString *comp_info_str, GString *runtime_info_str)
845 printf("TShark " VERSION "%s\n"
852 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
853 runtime_info_str->str);
857 main(int argc, char *argv[])
859 char *init_progfile_dir_error;
861 gboolean arg_error = FALSE;
867 char *gpf_path, *pf_path;
868 char *gdp_path, *dp_path;
869 int gpf_open_errno, gpf_read_errno;
870 int pf_open_errno, pf_read_errno;
871 int gdp_open_errno, gdp_read_errno;
872 int dp_open_errno, dp_read_errno;
874 volatile int exit_status = 0;
876 gboolean list_link_layer_types = FALSE;
877 gboolean start_capture = FALSE;
882 interface_options interface_opts;
884 gboolean capture_option_specified = FALSE;
886 gboolean quiet = FALSE;
887 #ifdef PCAP_NG_DEFAULT
888 volatile int out_file_type = WTAP_FILE_PCAPNG;
890 volatile int out_file_type = WTAP_FILE_PCAP;
892 volatile gboolean out_file_name_res = FALSE;
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 case 'H': /* Read address to name mappings from a hosts file */
1276 if (! read_hosts_file(optarg))
1278 cmdarg_err("Can't read host entries from \"%s\"", 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.");
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);
1500 if (global_capture_opts.default_options.cfilter) {
1501 cmdarg_err("A default capture filter was specified both with \"-f\""
1502 " and with additional command-line arguments.");
1505 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1506 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1507 if (interface_opts.cfilter == NULL) {
1508 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1509 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1510 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1512 cmdarg_err("A capture filter was specified both with \"-f\""
1513 " and with additional command-line arguments.");
1517 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1519 capture_option_specified = TRUE;
1525 if (!global_capture_opts.saving_to_file) {
1526 /* We're not saving the capture to a file; if "-q" wasn't specified,
1527 we should print packet information */
1529 print_packet_info = TRUE;
1531 /* We're saving to a file; if we're writing to the standard output.
1532 and we'll also be writing dissected packets to the standard
1533 output, reject the request. At best, we could redirect that
1534 to the standard error; we *can't* write both to the standard
1535 output and have either of them be useful. */
1536 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1537 cmdarg_err("You can't write both raw packet data and dissected packets"
1538 " to the standard output.");
1543 /* We're not saving the capture to a file; if "-q" wasn't specified,
1544 we should print packet information */
1546 print_packet_info = TRUE;
1549 #ifndef HAVE_LIBPCAP
1550 if (capture_option_specified)
1551 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1558 /* We don't support capture filters when reading from a capture file
1559 (the BPF compiler doesn't support all link-layer types that we
1560 support in capture files we read). */
1562 if (cf_name != NULL) {
1563 if (global_capture_opts.default_options.cfilter) {
1564 cmdarg_err("Only read filters, not capture filters, "
1565 "can be specified when reading a capture file.");
1572 if (output_action != WRITE_TEXT) {
1573 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1578 if (output_only != NULL) {
1581 if (!print_details) {
1582 cmdarg_err("-O requires -V");
1586 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1587 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1588 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1593 if (list_link_layer_types) {
1594 /* We're supposed to list the link-layer types for an interface;
1595 did the user also specify a capture file to be read? */
1597 /* Yes - that's bogus. */
1598 cmdarg_err("You can't specify -L and a capture file to be read.");
1601 /* No - did they specify a ring buffer option? */
1602 if (global_capture_opts.multi_files_on) {
1603 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1609 * "-r" was specified, so we're reading a capture file.
1610 * Capture options don't apply here.
1612 if (global_capture_opts.multi_files_on) {
1613 cmdarg_err("Multiple capture files requested, but "
1614 "a capture isn't being done.");
1617 if (global_capture_opts.has_file_duration) {
1618 cmdarg_err("Switching capture files after a time interval was specified, but "
1619 "a capture isn't being done.");
1622 if (global_capture_opts.has_ring_num_files) {
1623 cmdarg_err("A ring buffer of capture files was specified, but "
1624 "a capture isn't being done.");
1627 if (global_capture_opts.has_autostop_files) {
1628 cmdarg_err("A maximum number of capture files was specified, but "
1629 "a capture isn't being done.");
1633 /* Note: TShark now allows the restriction of a _read_ file by packet count
1634 * and byte count as well as a write file. Other autostop options remain valid
1635 * only for a write file.
1637 if (global_capture_opts.has_autostop_duration) {
1638 cmdarg_err("A maximum capture time was specified, but "
1639 "a capture isn't being done.");
1644 * "-r" wasn't specified, so we're doing a live capture.
1646 if (global_capture_opts.saving_to_file) {
1647 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1649 /* When capturing, we only support writing pcap or pcap-ng format. */
1650 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1651 cmdarg_err("Live captures can only be saved in libpcap format.");
1654 if (global_capture_opts.multi_files_on) {
1655 /* Multiple-file mode doesn't work under certain conditions:
1656 a) it doesn't work if you're writing to the standard output;
1657 b) it doesn't work if you're writing to a pipe;
1659 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1660 cmdarg_err("Multiple capture files requested, but "
1661 "the capture is being written to the standard output.");
1664 if (global_capture_opts.output_to_pipe) {
1665 cmdarg_err("Multiple capture files requested, but "
1666 "the capture file is a pipe.");
1669 if (!global_capture_opts.has_autostop_filesize &&
1670 !global_capture_opts.has_file_duration) {
1671 cmdarg_err("Multiple capture files requested, but "
1672 "no maximum capture file size or duration was specified.");
1676 /* Currently, we don't support read filters when capturing
1677 and saving the packets. */
1678 if (rfilter != NULL) {
1679 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1683 /* They didn't specify a "-w" flag, so we won't be saving to a
1684 capture file. Check for options that only make sense if
1685 we're saving to a file. */
1686 if (global_capture_opts.has_autostop_filesize) {
1687 cmdarg_err("Maximum capture file size specified, but "
1688 "capture isn't being saved to a file.");
1691 if (global_capture_opts.multi_files_on) {
1692 cmdarg_err("Multiple capture files requested, but "
1693 "the capture isn't being saved to a file.");
1702 /* Start windows sockets */
1703 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1706 /* Notify all registered modules that have had any of their preferences
1707 changed either from one of the preferences file or from the command
1708 line that their preferences have changed. */
1711 /* At this point MATE will have registered its field array so we can
1712 have a tap filter with one of MATE's late-registered fields as part
1713 of the filter. We can now process all the "-z" arguments. */
1714 start_requested_stats();
1717 /* We currently don't support taps, or printing dissected packets,
1718 if we're writing to a pipe. */
1719 if (global_capture_opts.saving_to_file &&
1720 global_capture_opts.output_to_pipe) {
1721 if (tap_listeners_require_dissection()) {
1722 cmdarg_err("Taps aren't supported when saving to a pipe.");
1725 if (print_packet_info) {
1726 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1732 /* disabled protocols as per configuration file */
1733 if (gdp_path == NULL && dp_path == NULL) {
1734 set_disabled_protos_list();
1737 /* Build the column format array */
1738 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1741 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1742 capture_opts_trim_ring_num_files(&global_capture_opts);
1745 if (rfilter != NULL) {
1746 if (!dfilter_compile(rfilter, &rfcode)) {
1747 cmdarg_err("%s", dfilter_error_msg);
1749 #ifdef HAVE_PCAP_OPEN_DEAD
1753 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1755 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1757 " Note: That display filter code looks like a valid capture filter;");
1759 " maybe you mixed them up?");
1768 cfile.rfcode = rfcode;
1770 if (print_packet_info) {
1771 /* If we're printing as text or PostScript, we have
1772 to create a print stream. */
1773 if (output_action == WRITE_TEXT) {
1774 switch (print_format) {
1777 print_stream = print_stream_text_stdio_new(stdout);
1781 print_stream = print_stream_ps_stdio_new(stdout);
1785 g_assert_not_reached();
1790 /* We have to dissect each packet if:
1792 we're printing information about each packet;
1794 we're using a read filter on the packets;
1796 we're using any taps that need dissection. */
1797 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1801 * We're reading a capture file.
1805 * Immediately relinquish any special privileges we have; we must not
1806 * be allowed to read any capture files the user running TShark
1809 relinquish_special_privs_perm();
1810 print_current_user();
1812 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1817 /* Set timestamp precision; there should arguably be a command-line
1818 option to let the user set this. */
1819 switch(wtap_file_tsprecision(cfile.wth)) {
1820 case(WTAP_FILE_TSPREC_SEC):
1821 timestamp_set_precision(TS_PREC_AUTO_SEC);
1823 case(WTAP_FILE_TSPREC_DSEC):
1824 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1826 case(WTAP_FILE_TSPREC_CSEC):
1827 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1829 case(WTAP_FILE_TSPREC_MSEC):
1830 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1832 case(WTAP_FILE_TSPREC_USEC):
1833 timestamp_set_precision(TS_PREC_AUTO_USEC);
1835 case(WTAP_FILE_TSPREC_NSEC):
1836 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1839 g_assert_not_reached();
1842 /* Process the packets in the file */
1845 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1846 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1847 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1849 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1852 CATCH(OutOfMemoryError) {
1856 "Sorry, but TShark has to terminate now!\n"
1858 "Some infos / workarounds can be found at:\n"
1859 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1864 /* We still dump out the results of taps, etc., as we might have
1865 read some packets; however, we exit with an error status. */
1869 /* No capture file specified, so we're supposed to do a live capture
1870 (or get a list of link-layer types for a live capture device);
1871 do we have support for live captures? */
1873 /* trim the interface name and exit if that failed */
1874 if (!capture_opts_trim_iface(&global_capture_opts,
1875 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL)) {
1879 /* if requested, list the link layer types and exit */
1880 if (list_link_layer_types) {
1882 interface_options interface_opts;
1884 /* Get the list of link-layer types for the capture devices. */
1885 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1886 if_capabilities_t *caps;
1888 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1889 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1891 cmdarg_err("%s", err_str);
1895 if (caps->data_link_types == NULL) {
1896 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1899 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1900 free_if_capabilities(caps);
1905 if (print_packet_info) {
1906 if (!write_preamble(NULL)) {
1907 show_print_file_io_error(errno);
1910 } else if (!quiet) {
1912 * We're not printing information for each packet, and the user
1913 * didn't ask us not to print a count of packets as they arrive,
1914 * so print that count so the user knows that packets are arriving.
1916 * XXX - what if the user wants to do a live capture, doesn't want
1917 * to save it to a file, doesn't want information printed for each
1918 * packet, does want some "-z" statistic, and wants packet counts
1919 * so they know whether they're seeing any packets?
1921 print_packet_counts = TRUE;
1924 /* For now, assume libpcap gives microsecond precision. */
1925 timestamp_set_precision(TS_PREC_AUTO_USEC);
1928 * XXX - this returns FALSE if an error occurred, but it also
1929 * returns FALSE if the capture stops because a time limit
1930 * was reached (and possibly other limits), so we can't assume
1931 * it means an error.
1933 * The capture code is a bit twisty, so it doesn't appear to
1934 * be an easy fix. We just ignore the return value for now.
1935 * Instead, pass on the exit status from the capture child.
1938 exit_status = global_capture_opts.fork_child_status;
1940 if (print_packet_info) {
1941 if (!write_finale()) {
1943 show_print_file_io_error(err);
1947 /* No - complain. */
1948 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1955 if (cfile.frames != NULL) {
1956 free_frame_data_sequence(cfile.frames);
1957 cfile.frames = NULL;
1960 draw_tap_listeners(TRUE);
1961 funnel_dump_all_text_windows();
1964 output_fields_free(output_fields);
1965 output_fields = NULL;
1970 /*#define USE_BROKEN_G_MAIN_LOOP*/
1972 #ifdef USE_BROKEN_G_MAIN_LOOP
1975 gboolean loop_running = FALSE;
1977 guint32 packet_count = 0;
1980 /* XXX - move to the right position / file */
1981 /* read from a pipe (callback) */
1982 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1984 typedef struct pipe_input_tag {
1988 pipe_input_cb_t input_cb;
1989 guint pipe_input_id;
1991 GMutex *callback_running;
1995 static pipe_input_t pipe_input;
1998 /* The timer has expired, see if there's stuff to read from the pipe,
1999 if so, do the callback */
2001 pipe_timer_cb(gpointer data)
2007 pipe_input_t *pipe_input_p = data;
2008 gint iterations = 0;
2010 g_mutex_lock (pipe_input_p->callback_running);
2012 /* try to read data from the pipe only 5 times, to avoid blocking */
2013 while(iterations < 5) {
2014 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2016 /* Oddly enough although Named pipes don't work on win9x,
2017 PeekNamedPipe does !!! */
2018 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2019 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2021 /* Get the child process exit status */
2022 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2025 /* If the Peek returned an error, or there are bytes to be read
2026 or the childwatcher thread has terminated then call the normal
2028 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2030 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2032 /* And call the real handler */
2033 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2034 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2035 /* pipe closed, return false so that the timer is stopped */
2036 g_mutex_unlock (pipe_input_p->callback_running);
2041 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2042 /* No data, stop now */
2049 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2051 g_mutex_unlock (pipe_input_p->callback_running);
2053 /* we didn't stopped the timer, so let it run */
2060 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2063 pipe_input.source = source;
2064 pipe_input.child_process = child_process;
2065 pipe_input.user_data = user_data;
2066 pipe_input.input_cb = input_cb;
2069 #if GLIB_CHECK_VERSION(2,31,0)
2070 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2071 g_mutex_init(pipe_input.callback_running);
2073 pipe_input.callback_running = g_mutex_new();
2075 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2076 do this but that doesn't cover all win32 platforms. GTK can do
2077 this but doesn't seem to work over processes. Attempt to do
2078 something similar here, start a timer and check for data on every
2080 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2081 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2092 GString *str = g_string_new("");
2093 #ifdef USE_TSHARK_SELECT
2097 struct sigaction action, oldaction;
2101 * XXX - dropping privileges is still required, until code cleanup is done
2103 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2104 * when it's done, we don't need special privileges to run tshark at all,
2105 * therefore we don't need to drop these privileges
2106 * The only thing we might want to keep is a warning if tshark is run as root,
2107 * as it's no longer necessary and potentially dangerous.
2109 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2110 * We've opened the capture device, so we shouldn't need any special
2111 * privileges any more; relinquish those privileges.
2113 * XXX - if we have saved set-user-ID support, we should give up those
2114 * privileges immediately, and then reclaim them long enough to get
2115 * a list of network interfaces and to open one, and then give them
2116 * up again, so that stuff we do while processing the argument list,
2117 * reading the user's preferences, loading and starting plugins
2118 * (especially *user* plugins), etc. is done with the user's privileges,
2119 * not special privileges.
2121 relinquish_special_privs_perm();
2122 print_current_user();
2124 /* Cleanup all data structures used for dissection. */
2125 cleanup_dissection();
2126 /* Initialize all data structures used for dissection. */
2130 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2131 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2133 /* Catch SIGINT and SIGTERM and, if we get either of them,
2134 clean up and exit. If SIGHUP isn't being ignored, catch
2135 it too and, if we get it, clean up and exit.
2137 We restart any read that was in progress, so that it doesn't
2138 disrupt reading from the sync pipe. The signal handler tells
2139 the capture child to finish; it will report that it finished,
2140 or will exit abnormally, so we'll stop reading from the sync
2141 pipe, pick up the exit status, and quit. */
2142 memset(&action, 0, sizeof(action));
2143 action.sa_handler = capture_cleanup;
2144 action.sa_flags = SA_RESTART;
2145 sigemptyset(&action.sa_mask);
2146 sigaction(SIGTERM, &action, NULL);
2147 sigaction(SIGINT, &action, NULL);
2148 sigaction(SIGHUP, NULL, &oldaction);
2149 if (oldaction.sa_handler == SIG_DFL)
2150 sigaction(SIGHUP, &action, NULL);
2153 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2154 quiet mode, report the number of packets we've captured.
2156 Again, restart any read that was in progress, so that it doesn't
2157 disrupt reading from the sync pipe. */
2158 action.sa_handler = report_counts_siginfo;
2159 action.sa_flags = SA_RESTART;
2160 sigemptyset(&action.sa_mask);
2161 sigaction(SIGINFO, &action, NULL);
2162 #endif /* SIGINFO */
2165 global_capture_opts.state = CAPTURE_PREPARING;
2167 /* Let the user know which interfaces were chosen. */
2168 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2169 interface_options interface_opts;
2171 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2172 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2173 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2174 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2177 if (global_capture_opts.ifaces->len < 2) {
2179 if (global_capture_opts.ifaces->len < 4) {
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);
2186 if (global_capture_opts.ifaces->len > 2) {
2187 g_string_append_printf(str, ",");
2189 g_string_append_printf(str, " ");
2190 if (i == global_capture_opts.ifaces->len - 1) {
2191 g_string_append_printf(str, "and ");
2194 g_string_append_printf(str, "%s", interface_opts.descr);
2197 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2199 fprintf(stderr, "Capturing on %s\n", str->str);
2200 g_string_free(str, TRUE);
2202 ret = sync_pipe_start(&global_capture_opts);
2207 /* the actual capture loop
2209 * XXX - glib doesn't seem to provide any event based loop handling.
2211 * XXX - for whatever reason,
2212 * calling g_main_loop_new() ends up in 100% cpu load.
2214 * But that doesn't matter: in UNIX we can use select() to find an input
2215 * source with something to do.
2217 * But that doesn't matter because we're in a CLI (that doesn't need to
2218 * update a GUI or something at the same time) so it's OK if we block
2219 * trying to read from the pipe.
2221 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2222 * wrong (but I leave it there in case I am...).
2225 #ifdef USE_TSHARK_SELECT
2227 FD_SET(pipe_input.source, &readfds);
2230 loop_running = TRUE;
2234 while (loop_running)
2236 #ifdef USE_TSHARK_SELECT
2237 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2243 } else if (ret == 1) {
2245 /* Call the real handler */
2246 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2247 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2250 #ifdef USE_TSHARK_SELECT
2255 CATCH(OutOfMemoryError) {
2259 "Sorry, but TShark has to terminate now!\n"
2261 "Some infos / workarounds can be found at:\n"
2262 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2270 /* XXX - move the call to main_window_update() out of capture_sync.c */
2271 /* dummy for capture_sync.c to make linker happy */
2272 void main_window_update(void)
2276 /* capture child detected an error */
2278 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2280 cmdarg_err("%s", error_msg);
2281 cmdarg_err_cont("%s", secondary_error_msg);
2285 /* capture child detected an capture filter related error */
2287 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2289 dfilter_t *rfcode = NULL;
2290 interface_options interface_opts;
2292 g_assert(i < capture_opts->ifaces->len);
2293 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2295 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2297 "Invalid capture filter \"%s\" for interface %s!\n"
2299 "That string looks like a valid display filter; however, it isn't a valid\n"
2300 "capture filter (%s).\n"
2302 "Note that display filters and capture filters don't have the same syntax,\n"
2303 "so you can't use most display filter expressions as capture filters.\n"
2305 "See the User's Guide for a description of the capture filter syntax.",
2306 interface_opts.cfilter, interface_opts.descr, error_message);
2307 dfilter_free(rfcode);
2310 "Invalid capture filter \"%s\" for interface %s!\n"
2312 "That string isn't a valid capture filter (%s).\n"
2313 "See the User's Guide for a description of the capture filter syntax.",
2314 interface_opts.cfilter, interface_opts.descr, error_message);
2319 /* capture child tells us we have a new (or the first) capture file */
2321 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2323 gboolean is_tempfile;
2326 if(capture_opts->state == CAPTURE_PREPARING) {
2327 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2329 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2331 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2333 /* free the old filename */
2334 if (capture_opts->save_file != NULL) {
2336 /* we start a new capture file, close the old one (if we had one before) */
2337 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2338 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2339 wtap_close(((capture_file *) capture_opts->cf)->wth);
2341 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2344 g_free(capture_opts->save_file);
2345 is_tempfile = FALSE;
2347 /* we didn't had a save_file before, must be a tempfile */
2351 /* save the new filename */
2352 capture_opts->save_file = g_strdup(new_file);
2354 /* if we are in real-time mode, open the new file now */
2356 /* Attempt to open the capture file and set up to read from it. */
2357 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2361 /* Don't unlink (delete) the save file - leave it around,
2362 for debugging purposes. */
2363 g_free(capture_opts->save_file);
2364 capture_opts->save_file = NULL;
2369 capture_opts->state = CAPTURE_RUNNING;
2375 /* capture child tells us we have new packets to read */
2377 capture_input_new_packets(capture_options *capture_opts, int to_read)
2383 capture_file *cf = capture_opts->cf;
2384 gboolean filtering_tap_listeners;
2389 * Prevent a SIGINFO handler from writing to the standard error while
2390 * we're doing so or writing to the standard output; instead, have it
2391 * just set a flag telling us to print that information when we're done.
2394 #endif /* SIGINFO */
2396 /* Do we have any tap listeners with filters? */
2397 filtering_tap_listeners = have_filtering_tap_listeners();
2399 /* Get the union of the flags for all tap listeners. */
2400 tap_flags = union_of_tap_listener_flags();
2403 while (to_read-- && cf->wth) {
2404 wtap_cleareof(cf->wth);
2405 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2407 /* read from file failed, tell the capture child to stop */
2408 sync_pipe_stop(capture_opts);
2409 wtap_close(cf->wth);
2412 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2413 wtap_buf_ptr(cf->wth),
2414 filtering_tap_listeners, tap_flags);
2417 /* packet successfully read and gone through the "Read Filter" */
2423 * Dumpcap's doing all the work; we're not doing any dissection.
2424 * Count all the packets it wrote.
2426 packet_count += to_read;
2429 if (print_packet_counts) {
2430 /* We're printing packet counts. */
2431 if (packet_count != 0) {
2432 fprintf(stderr, "\r%u ", packet_count);
2433 /* stderr could be line buffered */
2440 * Allow SIGINFO handlers to write.
2445 * If a SIGINFO handler asked us to write out capture counts, do so.
2449 #endif /* SIGINFO */
2455 if (!print_packet_counts) {
2456 /* Report the count only if we aren't printing a packet count
2457 as packets arrive. */
2458 fprintf(stderr, "%u packet%s captured\n", packet_count,
2459 plurality(packet_count, "", "s"));
2462 infoprint = FALSE; /* we just reported it */
2463 #endif /* SIGINFO */
2468 report_counts_siginfo(int signum _U_)
2470 int sav_errno = errno;
2471 /* If we've been told to delay printing, just set a flag asking
2472 that we print counts (if we're supposed to), otherwise print
2473 the count of packets captured (if we're supposed to). */
2480 #endif /* SIGINFO */
2483 /* capture child detected any packet drops? */
2485 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2487 if (print_packet_counts) {
2488 /* We're printing packet counts to stderr.
2489 Send a newline so that we move to the line after the packet count. */
2490 fprintf(stderr, "\n");
2494 /* We're printing packet counts to stderr.
2495 Send a newline so that we move to the line after the packet count. */
2496 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2502 * Capture child closed its side of the pipe, report any error and
2503 * do the required cleanup.
2506 capture_input_closed(capture_options *capture_opts, gchar *msg)
2508 capture_file *cf = (capture_file *) capture_opts->cf;
2511 fprintf(stderr, "tshark: %s\n", msg);
2515 if(cf != NULL && cf->wth != NULL) {
2516 wtap_close(cf->wth);
2517 if(cf->is_tempfile) {
2518 ws_unlink(cf->filename);
2521 #ifdef USE_BROKEN_G_MAIN_LOOP
2522 /*g_main_loop_quit(loop);*/
2525 loop_running = FALSE;
2534 capture_cleanup(DWORD ctrltype _U_)
2536 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2537 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2538 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2539 like SIGTERM at least when the machine's shutting down.
2541 For now, we handle them all as indications that we should clean up
2542 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2545 We must return TRUE so that no other handler - such as one that would
2546 terminate the process - gets called.
2548 XXX - for some reason, typing ^C to TShark, if you run this in
2549 a Cygwin console window in at least some versions of Cygwin,
2550 causes TShark to terminate immediately; this routine gets
2551 called, but the main loop doesn't get a chance to run and
2552 exit cleanly, at least if this is compiled with Microsoft Visual
2553 C++ (i.e., it's a property of the Cygwin console window or Bash;
2554 it happens if TShark is not built with Cygwin - for all I know,
2555 building it with Cygwin may make the problem go away). */
2557 /* tell the capture child to stop */
2558 sync_pipe_stop(&global_capture_opts);
2560 /* don't stop our own loop already here, otherwise status messages and
2561 * cleanup wouldn't be done properly. The child will indicate the stop of
2562 * everything by calling capture_input_closed() later */
2568 capture_cleanup(int signum _U_)
2570 /* tell the capture child to stop */
2571 sync_pipe_stop(&global_capture_opts);
2573 /* don't stop our own loop already here, otherwise status messages and
2574 * cleanup wouldn't be done properly. The child will indicate the stop of
2575 * everything by calling capture_input_closed() later */
2578 #endif /* HAVE_LIBPCAP */
2581 process_packet_first_pass(capture_file *cf,
2582 gint64 offset, struct wtap_pkthdr *whdr,
2587 gboolean create_proto_tree = FALSE;
2591 /* The frame number of this packet is one more than the count of
2592 frames in this packet. */
2593 framenum = cf->count + 1;
2595 /* If we're not running a display filter and we're not printing any
2596 packet information, we don't need to do a dissection. This means
2597 that all packets can be marked as 'passed'. */
2600 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2602 /* If we're going to print packet information, or we're going to
2603 run a read filter, or we're going to process taps, set up to
2604 do a dissection and do so. */
2605 if (do_dissection) {
2606 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2607 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2608 /* Grab any resolved addresses */
2609 host_name_lookup_process();
2611 /* If we're going to be applying a read filter, we'll need to
2612 create a protocol tree against which to apply the filter. */
2614 create_proto_tree = TRUE;
2616 /* We're not going to display the protocol tree on this pass,
2617 so it's not going to be "visible". */
2618 epan_dissect_init(&edt, create_proto_tree, FALSE);
2620 /* If we're running a read filter, prime the epan_dissect_t with that
2623 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2625 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2626 &first_ts, prev_dis, prev_cap);
2628 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2630 /* Run the read filter if we have one. */
2632 passed = dfilter_apply_edt(cf->rfcode, &edt);
2636 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2637 prev_dis_frame = fdlocal;
2638 prev_dis = &prev_dis_frame;
2639 frame_data_sequence_add(cf->frames, &fdlocal);
2643 prev_cap_frame = fdlocal;
2644 prev_cap = &prev_cap_frame;
2647 epan_dissect_cleanup(&edt);
2653 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2654 struct wtap_pkthdr *phdr, const guchar *pd,
2655 gboolean filtering_tap_listeners, guint tap_flags)
2657 gboolean create_proto_tree;
2662 /* If we're not running a display filter and we're not printing any
2663 packet information, we don't need to do a dissection. This means
2664 that all packets can be marked as 'passed'. */
2667 /* If we're going to print packet information, or we're going to
2668 run a read filter, or we're going to process taps, set up to
2669 do a dissection and do so. */
2670 if (do_dissection) {
2671 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2672 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2673 /* Grab any resolved addresses */
2674 host_name_lookup_process();
2676 if (cf->rfcode || print_details || filtering_tap_listeners ||
2677 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2678 create_proto_tree = TRUE;
2680 create_proto_tree = FALSE;
2682 /* The protocol tree will be "visible", i.e., printed, only if we're
2683 printing packet details, which is true if we're printing stuff
2684 ("print_packet_info" is true) and we're in verbose mode
2685 ("packet_details" is true). */
2686 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2688 /* If we're running a read filter, prime the epan_dissect_t with that
2691 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2693 col_custom_prime_edt(&edt, &cf->cinfo);
2695 /* We only need the columns if either
2696 1) some tap needs the columns
2698 2) we're printing packet info but we're *not* verbose; in verbose
2699 mode, we print the protocol tree, not the protocol summary.
2701 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2706 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2708 /* Run the read filter if we have one. */
2710 passed = dfilter_apply_edt(cf->rfcode, &edt);
2714 /* Process this packet. */
2715 if (print_packet_info) {
2716 /* We're printing packet information; print the information for
2719 print_packet(cf, &edt);
2721 print_packet(cf, NULL);
2723 /* The ANSI C standard does not appear to *require* that a line-buffered
2724 stream be flushed to the host environment whenever a newline is
2725 written, it just says that, on such a stream, characters "are
2726 intended to be transmitted to or from the host environment as a
2727 block when a new-line character is encountered".
2729 The Visual C++ 6.0 C implementation doesn't do what is intended;
2730 even if you set a stream to be line-buffered, it still doesn't
2731 flush the buffer at the end of every line.
2733 So, if the "-l" flag was specified, we flush the standard output
2734 at the end of a packet. This will do the right thing if we're
2735 printing packet summary lines, and, as we print the entire protocol
2736 tree for a single packet without waiting for anything to happen,
2737 it should be as good as line-buffered mode if we're printing
2738 protocol trees. (The whole reason for the "-l" flag in either
2739 tcpdump or TShark is to allow the output of a live capture to
2740 be piped to a program or script and to have that script see the
2741 information for the packet as soon as it's printed, rather than
2742 having to wait until a standard I/O buffer fills up. */
2746 if (ferror(stdout)) {
2747 show_print_file_io_error(errno);
2753 if (do_dissection) {
2754 epan_dissect_cleanup(&edt);
2760 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2761 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2764 int snapshot_length;
2768 gchar *err_info = NULL;
2770 char *save_file_string = NULL;
2771 gboolean filtering_tap_listeners;
2773 wtapng_section_t *shb_hdr;
2774 wtapng_iface_descriptions_t *idb_inf;
2777 shb_hdr = wtap_file_get_shb_info(cf->wth);
2778 idb_inf = wtap_file_get_idb_info(cf->wth);
2779 #ifdef PCAP_NG_DEFAULT
2780 if (idb_inf->number_of_interfaces > 0) {
2781 linktype = WTAP_ENCAP_PER_PACKET;
2783 linktype = wtap_file_encap(cf->wth);
2786 linktype = wtap_file_encap(cf->wth);
2788 if (save_file != NULL) {
2789 /* Get a string that describes what we're writing to */
2790 save_file_string = output_file_description(save_file);
2792 /* Set up to write to the capture file. */
2793 snapshot_length = wtap_snapshot_length(cf->wth);
2794 if (snapshot_length == 0) {
2795 /* Snapshot length of input file not known. */
2796 snapshot_length = WTAP_MAX_PACKET_SIZE;
2798 /* If we don't have an application name add Tshark */
2799 if(shb_hdr->shb_user_appl == NULL) {
2800 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2801 shb_hdr->shb_user_appl = appname;
2804 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2805 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2811 /* We couldn't set up to write to the capture file. */
2814 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2815 cmdarg_err("Capture files can't be written in that format.");
2818 case WTAP_ERR_UNSUPPORTED_ENCAP:
2819 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2820 cmdarg_err("The capture file being read can't be written as a "
2821 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2824 case WTAP_ERR_CANT_OPEN:
2825 cmdarg_err("The %s couldn't be created for some "
2826 "unknown reason.", save_file_string);
2829 case WTAP_ERR_SHORT_WRITE:
2830 cmdarg_err("A full header couldn't be written to the %s.",
2835 cmdarg_err("The %s could not be created: %s.", save_file_string,
2836 wtap_strerror(err));
2842 if (print_packet_info) {
2843 if (!write_preamble(cf)) {
2845 show_print_file_io_error(err);
2852 if (pdh && out_file_name_res) {
2853 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2854 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2855 wtap_file_type_short_string(out_file_type));
2859 /* Do we have any tap listeners with filters? */
2860 filtering_tap_listeners = have_filtering_tap_listeners();
2862 /* Get the union of the flags for all tap listeners. */
2863 tap_flags = union_of_tap_listener_flags();
2865 if (perform_two_pass_analysis) {
2867 int old_max_packet_count = max_packet_count;
2869 /* Allocate a frame_data_sequence for all the frames. */
2870 cf->frames = new_frame_data_sequence();
2872 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2873 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2874 wtap_buf_ptr(cf->wth))) {
2875 /* Stop reading if we have the maximum number of packets;
2876 * When the -c option has not been used, max_packet_count
2877 * starts at 0, which practically means, never stop reading.
2878 * (unless we roll over max_packet_count ?)
2880 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2881 err = 0; /* This is not an error */
2887 /* Close the sequential I/O side, to free up memory it requires. */
2888 wtap_sequential_close(cf->wth);
2890 /* Allow the protocol dissectors to free up memory that they
2891 * don't need after the sequential run-through of the packets. */
2892 postseq_cleanup_all_protocols();
2894 max_packet_count = old_max_packet_count;
2896 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2897 fdata = frame_data_sequence_find(cf->frames, framenum);
2898 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2899 cf->pd, fdata->cap_len, &err, &err_info)) {
2900 if (process_packet_second_pass(cf, fdata,
2902 filtering_tap_listeners, tap_flags)) {
2903 /* Either there's no read filtering or this packet passed the
2904 filter, so, if we're writing to a capture file, write
2907 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2908 /* Error writing to a capture file */
2911 case WTAP_ERR_UNSUPPORTED_ENCAP:
2913 * This is a problem with the particular frame we're writing;
2914 * note that, and give the frame number.
2916 * XXX - framenum is not necessarily the frame number in
2917 * the input file if there was a read filter.
2920 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2921 framenum, cf->filename,
2922 wtap_file_type_short_string(out_file_type));
2926 show_capture_file_io_error(save_file, err, FALSE);
2929 wtap_dump_close(pdh, &err);
2934 /* Stop reading if we have the maximum number of packets;
2935 * When the -c option has not been used, max_packet_count
2936 * starts at 0, which practically means, never stop reading.
2937 * (unless we roll over max_packet_count ?)
2939 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2940 err = 0; /* This is not an error */
2949 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2952 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2953 wtap_buf_ptr(cf->wth),
2954 filtering_tap_listeners, tap_flags)) {
2955 /* Either there's no read filtering or this packet passed the
2956 filter, so, if we're writing to a capture file, write
2959 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2960 /* Error writing to a capture file */
2963 case WTAP_ERR_UNSUPPORTED_ENCAP:
2965 * This is a problem with the particular frame we're writing;
2966 * note that, and give the frame number.
2969 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2970 framenum, cf->filename,
2971 wtap_file_type_short_string(out_file_type));
2975 show_capture_file_io_error(save_file, err, FALSE);
2978 wtap_dump_close(pdh, &err);
2983 /* Stop reading if we have the maximum number of packets;
2984 * When the -c option has not been used, max_packet_count
2985 * starts at 0, which practically means, never stop reading.
2986 * (unless we roll over max_packet_count ?)
2988 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2989 err = 0; /* This is not an error */
2998 * Print a message noting that the read failed somewhere along the line.
3000 * If we're printing packet data, and the standard output and error are
3001 * going to the same place, flush the standard output, so everything
3002 * buffered up is written, and then print a newline to the standard error
3003 * before printing the error message, to separate it from the packet
3004 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3005 * the _fstat() documentation at Microsoft doesn't indicate whether
3006 * st_ino is even supported.)
3009 if (print_packet_info) {
3010 struct stat stat_stdout, stat_stderr;
3012 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3013 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3014 stat_stdout.st_ino == stat_stderr.st_ino) {
3016 fprintf(stderr, "\n");
3023 case WTAP_ERR_UNSUPPORTED:
3024 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3025 cf->filename, err_info);
3029 case WTAP_ERR_UNSUPPORTED_ENCAP:
3030 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3031 cf->filename, err_info);
3035 case WTAP_ERR_CANT_READ:
3036 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3040 case WTAP_ERR_SHORT_READ:
3041 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3045 case WTAP_ERR_BAD_FILE:
3046 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3047 cf->filename, err_info);
3051 case WTAP_ERR_DECOMPRESS:
3052 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3053 "(%s)", cf->filename, err_info);
3057 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3058 cf->filename, wtap_strerror(err));
3061 if (save_file != NULL) {
3062 /* Now close the capture file. */
3063 if (!wtap_dump_close(pdh, &err))
3064 show_capture_file_io_error(save_file, err, TRUE);
3067 if (save_file != NULL) {
3068 /* Now close the capture file. */
3069 if (!wtap_dump_close(pdh, &err))
3070 show_capture_file_io_error(save_file, err, TRUE);
3072 if (print_packet_info) {
3073 if (!write_finale()) {
3075 show_print_file_io_error(err);
3082 wtap_close(cf->wth);
3085 g_free(save_file_string);
3092 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3094 gboolean filtering_tap_listeners, guint tap_flags)
3097 gboolean create_proto_tree;
3102 /* Count this packet. */
3105 /* If we're not running a display filter and we're not printing any
3106 packet information, we don't need to do a dissection. This means
3107 that all packets can be marked as 'passed'. */
3110 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3112 /* If we're going to print packet information, or we're going to
3113 run a read filter, or we're going to process taps, set up to
3114 do a dissection and do so. */
3115 if (do_dissection) {
3116 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3117 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3118 /* Grab any resolved addresses */
3119 host_name_lookup_process();
3121 if (cf->rfcode || print_details || filtering_tap_listeners ||
3122 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3123 create_proto_tree = TRUE;
3125 create_proto_tree = FALSE;
3127 /* The protocol tree will be "visible", i.e., printed, only if we're
3128 printing packet details, which is true if we're printing stuff
3129 ("print_packet_info" is true) and we're in verbose mode
3130 ("packet_details" is true). */
3131 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3133 /* If we're running a read filter, prime the epan_dissect_t with that
3136 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3138 col_custom_prime_edt(&edt, &cf->cinfo);
3140 /* We only need the columns if either
3141 1) some tap needs the columns
3143 2) we're printing packet info but we're *not* verbose; in verbose
3144 mode, we print the protocol tree, not the protocol summary. */
3145 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
3150 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3151 &first_ts, prev_dis, prev_cap);
3153 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3155 /* Run the read filter if we have one. */
3157 passed = dfilter_apply_edt(cf->rfcode, &edt);
3161 frame_data_set_after_dissect(&fdata, &cum_bytes);
3162 prev_dis_frame = fdata;
3163 prev_dis = &prev_dis_frame;
3165 /* Process this packet. */
3166 if (print_packet_info) {
3167 /* We're printing packet information; print the information for
3170 print_packet(cf, &edt);
3172 print_packet(cf, NULL);
3174 /* The ANSI C standard does not appear to *require* that a line-buffered
3175 stream be flushed to the host environment whenever a newline is
3176 written, it just says that, on such a stream, characters "are
3177 intended to be transmitted to or from the host environment as a
3178 block when a new-line character is encountered".
3180 The Visual C++ 6.0 C implementation doesn't do what is intended;
3181 even if you set a stream to be line-buffered, it still doesn't
3182 flush the buffer at the end of every line.
3184 So, if the "-l" flag was specified, we flush the standard output
3185 at the end of a packet. This will do the right thing if we're
3186 printing packet summary lines, and, as we print the entire protocol
3187 tree for a single packet without waiting for anything to happen,
3188 it should be as good as line-buffered mode if we're printing
3189 protocol trees. (The whole reason for the "-l" flag in either
3190 tcpdump or TShark is to allow the output of a live capture to
3191 be piped to a program or script and to have that script see the
3192 information for the packet as soon as it's printed, rather than
3193 having to wait until a standard I/O buffer fills up. */
3197 if (ferror(stdout)) {
3198 show_print_file_io_error(errno);
3204 prev_cap_frame = fdata;
3205 prev_cap = &prev_cap_frame;
3207 if (do_dissection) {
3208 epan_dissect_cleanup(&edt);
3209 frame_data_cleanup(&fdata);
3215 write_preamble(capture_file *cf)
3217 switch (output_action) {
3220 return print_preamble(print_stream, cf ? cf->filename : NULL);
3224 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3226 write_psml_preamble(stdout);
3227 return !ferror(stdout);
3230 write_fields_preamble(output_fields, stdout);
3231 return !ferror(stdout);
3234 g_assert_not_reached();
3240 get_line_buf(size_t len)
3242 static char *line_bufp = NULL;
3243 static size_t line_buf_len = 256;
3244 size_t new_line_buf_len;
3246 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3247 new_line_buf_len *= 2)
3249 if (line_bufp == NULL) {
3250 line_buf_len = new_line_buf_len;
3251 line_bufp = g_malloc(line_buf_len + 1);
3253 if (new_line_buf_len > line_buf_len) {
3254 line_buf_len = new_line_buf_len;
3255 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3262 print_columns(capture_file *cf)
3269 line_bufp = get_line_buf(256);
3272 for (i = 0; i < cf->cinfo.num_cols; i++) {
3273 /* Skip columns not marked as visible. */
3274 if (!get_column_visible(i))
3276 switch (cf->cinfo.col_fmt[i]) {
3280 * Don't print this if we're doing a live capture from a network
3281 * interface - if we're doing a live capture, you won't be
3282 * able to look at the capture in the future (it's not being
3283 * saved anywhere), so the frame numbers are unlikely to be
3286 * (XXX - it might be nice to be able to save and print at
3287 * the same time, sort of like an "Update list of packets
3288 * in real time" capture in Wireshark.)
3290 if (global_capture_opts.ifaces->len > 0)
3293 column_len = strlen(cf->cinfo.col_data[i]);
3296 line_bufp = get_line_buf(buf_offset + column_len);
3297 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3303 case COL_ABS_DATE_TIME:
3305 case COL_UTC_DATE_TIME: /* XXX - wider */
3306 column_len = strlen(cf->cinfo.col_data[i]);
3307 if (column_len < 10)
3309 line_bufp = get_line_buf(buf_offset + column_len);
3310 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3316 case COL_DEF_DL_SRC:
3317 case COL_RES_DL_SRC:
3318 case COL_UNRES_DL_SRC:
3319 case COL_DEF_NET_SRC:
3320 case COL_RES_NET_SRC:
3321 case COL_UNRES_NET_SRC:
3322 column_len = strlen(cf->cinfo.col_data[i]);
3323 if (column_len < 12)
3325 line_bufp = get_line_buf(buf_offset + column_len);
3326 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3332 case COL_DEF_DL_DST:
3333 case COL_RES_DL_DST:
3334 case COL_UNRES_DL_DST:
3335 case COL_DEF_NET_DST:
3336 case COL_RES_NET_DST:
3337 case COL_UNRES_NET_DST:
3338 column_len = strlen(cf->cinfo.col_data[i]);
3339 if (column_len < 12)
3341 line_bufp = get_line_buf(buf_offset + column_len);
3342 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3346 column_len = strlen(cf->cinfo.col_data[i]);
3347 line_bufp = get_line_buf(buf_offset + column_len);
3348 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3351 buf_offset += column_len;
3352 if (i != cf->cinfo.num_cols - 1) {
3354 * This isn't the last column, so we need to print a
3355 * separator between this column and the next.
3357 * If we printed a network source and are printing a
3358 * network destination of the same type next, separate
3359 * them with " -> "; if we printed a network destination
3360 * and are printing a network source of the same type
3361 * next, separate them with " <- "; otherwise separate them
3364 * We add enough space to the buffer for " <- " or " -> ",
3365 * even if we're only adding " ".
3367 line_bufp = get_line_buf(buf_offset + 4);
3368 switch (cf->cinfo.col_fmt[i]) {
3373 switch (cf->cinfo.col_fmt[i + 1]) {
3378 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3383 g_strlcat(line_bufp + buf_offset, " ", 5);
3389 case COL_DEF_DL_SRC:
3390 case COL_RES_DL_SRC:
3391 case COL_UNRES_DL_SRC:
3392 switch (cf->cinfo.col_fmt[i + 1]) {
3394 case COL_DEF_DL_DST:
3395 case COL_RES_DL_DST:
3396 case COL_UNRES_DL_DST:
3397 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3402 g_strlcat(line_bufp + buf_offset, " ", 5);
3408 case COL_DEF_NET_SRC:
3409 case COL_RES_NET_SRC:
3410 case COL_UNRES_NET_SRC:
3411 switch (cf->cinfo.col_fmt[i + 1]) {
3413 case COL_DEF_NET_DST:
3414 case COL_RES_NET_DST:
3415 case COL_UNRES_NET_DST:
3416 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3421 g_strlcat(line_bufp + buf_offset, " ", 5);
3430 switch (cf->cinfo.col_fmt[i + 1]) {
3435 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3440 g_strlcat(line_bufp + buf_offset, " ", 5);
3446 case COL_DEF_DL_DST:
3447 case COL_RES_DL_DST:
3448 case COL_UNRES_DL_DST:
3449 switch (cf->cinfo.col_fmt[i + 1]) {
3451 case COL_DEF_DL_SRC:
3452 case COL_RES_DL_SRC:
3453 case COL_UNRES_DL_SRC:
3454 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3459 g_strlcat(line_bufp + buf_offset, " ", 5);
3465 case COL_DEF_NET_DST:
3466 case COL_RES_NET_DST:
3467 case COL_UNRES_NET_DST:
3468 switch (cf->cinfo.col_fmt[i + 1]) {
3470 case COL_DEF_NET_SRC:
3471 case COL_RES_NET_SRC:
3472 case COL_UNRES_NET_SRC:
3473 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3478 g_strlcat(line_bufp + buf_offset, " ", 5);
3485 g_strlcat(line_bufp + buf_offset, " ", 5);
3491 return print_line(print_stream, 0, line_bufp);
3495 print_packet(capture_file *cf, epan_dissect_t *edt)
3497 print_args_t print_args;
3499 if (print_summary) {
3500 /* Just fill in the columns. */
3501 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3503 /* Now print them. */
3504 switch (output_action) {
3507 if (!print_columns(cf))
3512 proto_tree_write_psml(edt, stdout);
3513 return !ferror(stdout);
3514 case WRITE_FIELDS: /*No non-verbose "fields" format */
3515 g_assert_not_reached();
3519 if (print_details) {
3520 /* Print the information in the protocol tree. */
3521 switch (output_action) {
3524 /* Only initialize the fields that are actually used in proto_tree_print.
3525 * This is particularly important for .range, as that's heap memory which
3526 * we would otherwise have to g_free().
3527 print_args.to_file = TRUE;
3528 print_args.format = print_format;
3529 print_args.print_summary = print_summary;
3530 print_args.print_formfeed = FALSE;
3531 packet_range_init(&print_args.range, &cfile);
3533 print_args.print_hex = print_hex;
3534 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3536 if (!proto_tree_print(&print_args, edt, print_stream))
3539 if (!print_line(print_stream, 0, separator))
3545 proto_tree_write_pdml(edt, stdout);
3547 return !ferror(stdout);
3549 proto_tree_write_fields(output_fields, edt, stdout);
3551 return !ferror(stdout);
3555 if (print_summary || print_details) {
3556 if (!print_line(print_stream, 0, ""))
3559 if (!print_hex_data(print_stream, edt))
3561 if (!print_line(print_stream, 0, separator))
3570 switch (output_action) {
3573 return print_finale(print_stream);
3577 write_pdml_finale(stdout);
3579 write_psml_finale(stdout);
3580 return !ferror(stdout);
3583 write_fields_finale(output_fields, stdout);
3584 return !ferror(stdout);
3587 g_assert_not_reached();
3593 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3597 char err_msg[2048+1];
3599 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3603 /* The open succeeded. Fill in the information for this file. */
3605 /* Cleanup all data structures used for dissection. */
3606 cleanup_dissection();
3607 /* Initialize all data structures used for dissection. */
3611 cf->f_datalen = 0; /* not used, but set it anyway */
3613 /* Set the file name because we need it to set the follow stream filter.
3614 XXX - is that still true? We need it for other reasons, though,
3616 cf->filename = g_strdup(fname);
3618 /* Indicate whether it's a permanent or temporary file. */
3619 cf->is_tempfile = is_tempfile;
3621 /* No user changes yet. */
3622 cf->unsaved_changes = FALSE;
3624 cf->cd_t = wtap_file_type(cf->wth);
3626 cf->drops_known = FALSE;
3628 cf->snap = wtap_snapshot_length(cf->wth);
3629 if (cf->snap == 0) {
3630 /* Snapshot length not known. */
3631 cf->has_snap = FALSE;
3632 cf->snap = WTAP_MAX_PACKET_SIZE;
3634 cf->has_snap = TRUE;
3635 nstime_set_zero(&cf->elapsed_time);
3636 nstime_set_unset(&first_ts);
3640 cf->state = FILE_READ_IN_PROGRESS;
3642 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3643 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3648 g_snprintf(err_msg, sizeof err_msg,
3649 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3650 cmdarg_err("%s", err_msg);
3655 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3657 char *save_file_string;
3659 save_file_string = output_file_description(fname);
3664 cmdarg_err("Not all the packets could be written to the %s because there is "
3665 "no space left on the file system.",
3671 cmdarg_err("Not all the packets could be written to the %s because you are "
3672 "too close to, or over your disk quota.",
3677 case WTAP_ERR_CANT_CLOSE:
3678 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3682 case WTAP_ERR_SHORT_WRITE:
3683 cmdarg_err("Not all the packets could be written to the %s.",
3689 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3690 wtap_strerror(err));
3692 cmdarg_err("An error occurred while writing to the %s: %s.",
3693 save_file_string, wtap_strerror(err));
3697 g_free(save_file_string);
3701 show_print_file_io_error(int err)
3706 cmdarg_err("Not all the packets could be printed because there is "
3707 "no space left on the file system.");
3712 cmdarg_err("Not all the packets could be printed because you are "
3713 "too close to, or over your disk quota.");
3718 cmdarg_err("An error occurred while printing packets: %s.",
3725 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3729 static char errmsg_errno[1024+1];
3732 /* Wiretap error. */
3735 case WTAP_ERR_NOT_REGULAR_FILE:
3736 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3739 case WTAP_ERR_RANDOM_OPEN_PIPE:
3740 /* Seen only when opening a capture file for reading. */
3741 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3744 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3745 /* Seen only when opening a capture file for reading. */
3746 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3749 case WTAP_ERR_UNSUPPORTED:
3750 /* Seen only when opening a capture file for reading. */
3751 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3752 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3755 errmsg = errmsg_errno;
3758 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3759 /* Seen only when opening a capture file for writing. */
3760 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3761 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3762 "written to a pipe.", wtap_file_type_short_string(file_type));
3763 errmsg = errmsg_errno;
3766 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3767 /* Seen only when opening a capture file for writing. */
3768 errmsg = "TShark doesn't support writing capture files in that format.";
3771 case WTAP_ERR_UNSUPPORTED_ENCAP:
3773 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3774 "TShark can't save this capture as a \"%s\" file.",
3775 wtap_file_type_short_string(file_type));
3777 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3778 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3782 errmsg = errmsg_errno;
3785 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
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));
3790 errmsg = errmsg_errno;
3792 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3795 case WTAP_ERR_BAD_FILE:
3796 /* Seen only when opening a capture file for reading. */
3797 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3798 "The file \"%%s\" appears to be damaged or corrupt.\n"
3801 errmsg = errmsg_errno;
3804 case WTAP_ERR_CANT_OPEN:
3806 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3808 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3811 case WTAP_ERR_SHORT_READ:
3812 errmsg = "The file \"%s\" appears to have been cut short"
3813 " in the middle of a packet or other data.";
3816 case WTAP_ERR_SHORT_WRITE:
3817 errmsg = "A full header couldn't be written to the file \"%s\".";
3820 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3821 errmsg = "This file type cannot be written as a compressed file.";
3824 case WTAP_ERR_DECOMPRESS:
3825 /* Seen only when opening a capture file for reading. */
3826 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3827 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3830 errmsg = errmsg_errno;
3834 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3835 "The file \"%%s\" could not be %s: %s.",
3836 for_writing ? "created" : "opened",
3837 wtap_strerror(err));
3838 errmsg = errmsg_errno;
3842 errmsg = file_open_error_message(err, for_writing);
3847 * Open/create errors are reported with an console message in TShark.
3850 open_failure_message(const char *filename, int err, gboolean for_writing)
3852 fprintf(stderr, "tshark: ");
3853 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3854 fprintf(stderr, "\n");
3859 * General errors are reported with an console message in TShark.
3862 failure_message(const char *msg_format, va_list ap)
3864 fprintf(stderr, "tshark: ");
3865 vfprintf(stderr, msg_format, ap);
3866 fprintf(stderr, "\n");
3870 * Read errors are reported with an console message in TShark.
3873 read_failure_message(const char *filename, int err)
3875 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3876 filename, g_strerror(err));
3880 * Write errors are reported with an console message in TShark.
3883 write_failure_message(const char *filename, int err)
3885 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3886 filename, g_strerror(err));
3890 * Print to the standard error. This is a command-line tool, so there's
3891 * no need to pop up a console.
3894 vfprintf_stderr(const char *fmt, va_list ap)
3896 vfprintf(stderr, fmt, ap);
3900 fprintf_stderr(const char *fmt, ...)
3905 vfprintf_stderr(fmt, ap);
3910 * Report an error in command-line arguments.
3913 cmdarg_err(const char *fmt, ...)
3918 failure_message(fmt, ap);
3923 * Report additional information for an error in command-line arguments.
3926 cmdarg_err_cont(const char *fmt, ...)
3931 vfprintf(stderr, fmt, ap);
3932 fprintf(stderr, "\n");