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;
132 static gboolean really_quiet = FALSE;
134 static print_format_e print_format = PR_FMT_TEXT;
135 static print_stream_t *print_stream;
137 static output_fields_t* output_fields = NULL;
139 /* The line separator used between packets, changeable via the -S option */
140 static const char *separator = "";
144 * TRUE if we're to print packet counts to keep track of captured packets.
146 static gboolean print_packet_counts = TRUE;
148 static capture_options global_capture_opts;
151 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
152 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
155 static gboolean capture(void);
156 static void report_counts(void);
158 static BOOL WINAPI capture_cleanup(DWORD);
160 static void capture_cleanup(int);
162 static void report_counts_siginfo(int);
165 #endif /* HAVE_LIBPCAP */
167 static int load_cap_file(capture_file *, char *, int, gboolean, int, gint64);
168 static gboolean process_packet(capture_file *cf, gint64 offset,
169 struct wtap_pkthdr *whdr,
170 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
171 static void show_capture_file_io_error(const char *, int, gboolean);
172 static void show_print_file_io_error(int err);
173 static gboolean write_preamble(capture_file *cf);
174 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
175 static gboolean write_finale(void);
176 static const char *cf_open_error_message(int err, gchar *err_info,
177 gboolean for_writing, int file_type);
179 static void open_failure_message(const char *filename, int err,
180 gboolean for_writing);
181 static void failure_message(const char *msg_format, va_list ap);
182 static void read_failure_message(const char *filename, int err);
183 static void write_failure_message(const char *filename, int err);
188 const char *sstr; /* The short string */
189 const char *lstr; /* The long string */
193 string_compare(gconstpointer a, gconstpointer b)
195 return strcmp(((const struct string_elem *)a)->sstr,
196 ((const struct string_elem *)b)->sstr);
200 string_elem_print(gpointer data, gpointer not_used _U_)
202 fprintf(stderr, " %s - %s\n",
203 ((struct string_elem *)data)->sstr,
204 ((struct string_elem *)data)->lstr);
208 list_capture_types(void) {
210 struct string_elem *captypes;
213 captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
215 fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
216 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
217 if (wtap_dump_can_open(i)) {
218 captypes[i].sstr = wtap_file_type_short_string(i);
219 captypes[i].lstr = wtap_file_type_string(i);
220 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
223 g_slist_foreach(list, string_elem_print, NULL);
229 print_usage(gboolean print_ver)
236 "TShark " VERSION "%s\n"
237 "Dump and analyze network traffic.\n"
238 "See http://www.wireshark.org for more information.\n"
241 wireshark_svnversion, get_copyright_info());
245 fprintf(output, "\n");
246 fprintf(output, "Usage: tshark [options] ...\n");
247 fprintf(output, "\n");
250 fprintf(output, "Capture interface:\n");
251 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
252 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
253 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
254 fprintf(output, " -p don't capture in promiscuous mode\n");
255 #ifdef HAVE_PCAP_CREATE
256 fprintf(output, " -I capture in monitor mode, if available\n");
258 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
259 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
261 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
262 fprintf(output, " -D print list of interfaces and exit\n");
263 fprintf(output, " -L print list of link-layer types of iface and exit\n");
264 fprintf(output, "\n");
265 fprintf(output, "Capture stop conditions:\n");
266 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
267 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
268 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
269 fprintf(output, " files:NUM - stop after NUM files\n");
270 /*fprintf(output, "\n");*/
271 fprintf(output, "Capture output:\n");
272 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
273 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
274 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
275 #endif /* HAVE_LIBPCAP */
276 #ifdef HAVE_PCAP_REMOTE
277 fprintf(output, "RPCAP options:\n");
278 fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
280 /*fprintf(output, "\n");*/
281 fprintf(output, "Input file:\n");
282 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
284 fprintf(output, "\n");
285 fprintf(output, "Processing:\n");
286 fprintf(output, " -2 perform a two-pass analysis\n");
287 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
288 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
289 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
290 fprintf(output, " -d %s ...\n", decode_as_arg_template);
291 fprintf(output, " \"Decode As\", see the man page for details\n");
292 fprintf(output, " Example: tcp.port==8888,http\n");
293 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
294 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
296 /*fprintf(output, "\n");*/
297 fprintf(output, "Output:\n");
298 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
299 fprintf(output, " (or to the standard output for \"-\")\n");
300 fprintf(output, " -C <config profile> start with specified configuration profile\n");
301 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
302 fprintf(output, " an empty \"-F\" option will list the file types\n");
303 fprintf(output, " -V add output of packet tree (Packet Details)\n");
304 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
305 fprintf(output, " separated\n");
306 fprintf(output, " -P print packet summary even when writing to a file\n");
307 fprintf(output, " -S <separator> the line separator to print between packets\n");
308 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
309 fprintf(output, " -T pdml|ps|psml|text|fields\n");
310 fprintf(output, " format of text output (def: text)\n");
311 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
312 fprintf(output, " this option can be repeated to print multiple fields\n");
313 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
314 fprintf(output, " header=y|n switch headers on and off\n");
315 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
316 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
317 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
318 fprintf(output, " aggregator\n");
319 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
320 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
321 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
322 fprintf(output, " -l flush standard output after each packet\n");
323 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
324 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
325 fprintf(output, " -g enable group read access on the output file(s)\n");
326 fprintf(output, " -W n Save extra information in the file, if supported.\n");
327 fprintf(output, " n = write network address resolution information\n");
328 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
329 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
331 fprintf(output, "\n");
332 fprintf(output, "Miscellaneous:\n");
333 fprintf(output, " -h display this help and exit\n");
334 fprintf(output, " -v display version info and exit\n");
335 fprintf(output, " -o <name>:<value> ... override preference setting\n");
336 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
337 fprintf(output, " -G [report] dump one of several available reports and exit\n");
338 fprintf(output, " default report=\"fields\"\n");
339 fprintf(output, " use \"-G ?\" for more help\n");
343 glossary_option_help(void)
349 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
351 fprintf(output, "\n");
352 fprintf(output, "Usage: tshark -G [report]\n");
353 fprintf(output, "\n");
354 fprintf(output, "Glossary table reports:\n");
355 fprintf(output, " -G [fields] dump glossary in original format and exit\n");
356 fprintf(output, " -G fields2 dump glossary in format 2 and exit\n");
357 fprintf(output, " -G fields3 dump glossary in format 3 and exit\n");
358 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
359 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
360 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
361 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
362 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
363 fprintf(output, "\n");
364 fprintf(output, "Preference reports:\n");
365 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
366 fprintf(output, " -G currentprefs dump current preferences and exit\n");
367 fprintf(output, "\n");
372 * For a dissector table, print on the stream described by output,
373 * its short name (which is what's used in the "-d" option) and its
377 display_dissector_table_names(const char *table_name, const char *ui_name,
380 if ((prev_display_dissector_name == NULL) ||
381 (strcmp(prev_display_dissector_name, table_name) != 0)) {
382 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
383 prev_display_dissector_name = table_name;
388 * For a dissector handle, print on the stream described by output,
389 * the filter name (which is what's used in the "-d" option) and the full
390 * name for the protocol that corresponds to this handle.
393 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
396 const gchar *proto_filter_name;
397 const gchar *proto_ui_name;
399 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
401 if (proto_id != -1) {
402 proto_filter_name = proto_get_protocol_filter_name(proto_id);
403 proto_ui_name = proto_get_protocol_name(proto_id);
404 g_assert(proto_filter_name != NULL);
405 g_assert(proto_ui_name != NULL);
407 if ((prev_display_dissector_name == NULL) ||
408 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
409 fprintf((FILE *)output, "\t%s (%s)\n",
412 prev_display_dissector_name = proto_filter_name;
418 * The protocol_name_search structure is used by find_protocol_name_func()
419 * to pass parameters and store results
421 struct protocol_name_search{
422 gchar *searched_name; /* Protocol filter name we are looking for */
423 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
424 guint nb_match; /* How many dissectors matched searched_name */
426 typedef struct protocol_name_search *protocol_name_search_t;
429 * This function parses all dissectors associated with a table to find the
430 * one whose protocol has the specified filter name. It is called
431 * as a reference function in a call to dissector_table_foreach_handle.
432 * The name we are looking for, as well as the results, are stored in the
433 * protocol_name_search struct pointed to by user_data.
434 * If called using dissector_table_foreach_handle, we actually parse the
435 * whole list of dissectors.
438 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
442 const gchar *protocol_filter_name;
443 protocol_name_search_t search_info;
447 search_info = (protocol_name_search_t)user_data;
449 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
450 if (proto_id != -1) {
451 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
452 g_assert(protocol_filter_name != NULL);
453 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
455 if (search_info->nb_match == 0) {
456 /* Record this handle only if this is the first match */
457 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
459 search_info->nb_match++;
465 * Allow dissector key names to be sorted alphabetically
469 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
471 return strcmp((const char*)dissector_a, (const char*)dissector_b);
475 * Print all layer type names supported.
476 * We send the output to the stream described by the handle output.
480 fprint_all_layer_types(FILE *output)
483 prev_display_dissector_name = NULL;
484 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
488 * Print all protocol names supported for a specific layer type.
489 * table_name contains the layer type name in which the search is performed.
490 * We send the output to the stream described by the handle output.
494 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
497 prev_display_dissector_name = NULL;
498 dissector_table_foreach_handle(table_name,
499 display_dissector_names,
504 * The function below parses the command-line parameters for the decode as
505 * feature (a string pointer by cl_param).
506 * It checks the format of the command-line, searches for a matching table
507 * and dissector. If a table/dissector match is not found, we display a
508 * summary of the available tables/dissectors (on stderr) and return FALSE.
509 * If everything is fine, we get the "Decode as" preference activated,
510 * then we return TRUE.
513 add_decode_as(const gchar *cl_param)
516 guint32 selector, selector2;
517 gchar *decoded_param;
518 gchar *remaining_param;
520 gchar *dissector_str;
521 dissector_handle_t dissector_matching;
522 dissector_table_t table_matching;
523 ftenum_t dissector_table_selector_type;
524 struct protocol_name_search user_protocol_name;
528 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
531 decoded_param = g_strdup(cl_param);
532 g_assert(decoded_param);
535 /* The lines below will parse this string (modifying it) to extract all
536 necessary information. Note that decoded_param is still needed since
537 strings are not copied - we just save pointers. */
539 /* This section extracts a layer type (table_name) from decoded_param */
540 table_name = decoded_param; /* Layer type string starts from beginning */
542 remaining_param = strchr(table_name, '=');
543 if (remaining_param == NULL) {
544 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
545 /* If the argument does not follow the template, carry on anyway to check
546 if the table name is at least correct. If remaining_param is NULL,
547 we'll exit anyway further down */
550 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
553 /* Remove leading and trailing spaces from the table name */
554 while ( table_name[0] == ' ' )
556 while ( table_name[strlen(table_name) - 1] == ' ' )
557 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
559 /* The following part searches a table matching with the layer type specified */
560 table_matching = NULL;
562 /* Look for the requested table */
563 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
564 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
567 table_matching = find_dissector_table(table_name);
568 if (!table_matching) {
569 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
573 if (!table_matching) {
574 /* Display a list of supported layer types to help the user, if the
575 specified layer type was not found */
576 cmdarg_err("Valid layer types are:");
577 fprint_all_layer_types(stderr);
579 if (remaining_param == NULL || !table_matching) {
580 /* Exit if the layer type was not found, or if no '=' separator was found
582 g_free(decoded_param);
586 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
587 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
590 remaining_param++; /* Move to the second '=' */
591 *remaining_param = '\0'; /* Remove the second '=' */
593 remaining_param++; /* Position after the layer type string */
595 /* This section extracts a selector value (selector_str) from decoded_param */
597 selector_str = remaining_param; /* Next part starts with the selector number */
599 remaining_param = strchr(selector_str, ',');
600 if (remaining_param == NULL) {
601 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
602 /* If the argument does not follow the template, carry on anyway to check
603 if the selector value is at least correct. If remaining_param is NULL,
604 we'll exit anyway further down */
607 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
610 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
612 switch (dissector_table_selector_type) {
618 /* The selector for this table is an unsigned number. Parse it as such.
619 There's no need to remove leading and trailing spaces from the
620 selector number string, because sscanf will do that for us. */
621 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
626 if (op != ':' && op != '-') {
627 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
628 g_free(decoded_param);
632 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
633 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
634 g_free(decoded_param);
638 else if (selector2 < selector) {
639 /* We could swap them for the user, but maybe it's better to call
640 * this out as an error in case it's not what was intended? */
641 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
642 g_free(decoded_param);
647 cmdarg_err("Invalid selector number \"%s\"", selector_str);
648 g_free(decoded_param);
655 /* The selector for this table is a string. */
659 /* There are currently no dissector tables with any types other
660 than the ones listed above. */
661 g_assert_not_reached();
664 if (remaining_param == NULL) {
665 /* Exit if no ',' separator was found (see above) */
666 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
667 fprint_all_protocols_for_layer_types(stderr, table_name);
668 g_free(decoded_param);
672 remaining_param++; /* Position after the selector number string */
674 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
676 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
678 /* Remove leading and trailing spaces from the dissector name */
679 while ( dissector_str[0] == ' ' )
681 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
682 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
684 dissector_matching = NULL;
686 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
687 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 */
688 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
691 user_protocol_name.nb_match = 0;
692 user_protocol_name.searched_name = dissector_str;
693 user_protocol_name.matched_handle = NULL;
695 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 */
697 if (user_protocol_name.nb_match != 0) {
698 dissector_matching = user_protocol_name.matched_handle;
699 if (user_protocol_name.nb_match > 1) {
700 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
704 /* OK, check whether the problem is that there isn't any such
705 protocol, or that there is but it's not specified as a protocol
706 that's valid for that dissector table.
707 Note, we don't exit here, but dissector_matching will remain NULL,
709 if (proto_get_id_by_filter_name(dissector_str) == -1) {
710 /* No such protocol */
711 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
713 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
714 dissector_str, table_name);
719 if (!dissector_matching) {
720 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
721 fprint_all_protocols_for_layer_types(stderr, table_name);
722 g_free(decoded_param);
726 /* This is the end of the code that parses the command-line options.
727 All information is now stored in the variables:
731 The above variables that are strings are still pointing to areas within
732 decoded_parm. decoded_parm thus still needs to be kept allocated in
733 until we stop needing these variables
734 decoded_param will be deallocated at each exit point of this function */
737 /* We now have a pointer to the handle for the requested dissector
738 (requested protocol) inside the variable dissector_matching */
739 switch (dissector_table_selector_type) {
745 /* The selector for this table is an unsigned number. */
747 dissector_change_uint(table_name, selector, dissector_matching);
748 } else if (op == ':') {
749 for (i = selector; i < (guint64)selector + selector2; i++) {
750 dissector_change_uint(table_name, (guint32)i, dissector_matching);
752 } else { /* op == '-' */
753 for (i = selector; i <= selector2; i++) {
754 dissector_change_uint(table_name, (guint32)i, dissector_matching);
761 /* The selector for this table is a string. */
762 dissector_change_string(table_name, selector_str, dissector_matching);
766 /* There are currently no dissector tables with any types other
767 than the ones listed above. */
768 g_assert_not_reached();
770 g_free(decoded_param); /* "Decode As" rule has been successfully added */
775 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
776 const gchar *message, gpointer user_data)
778 /* ignore log message, if log_level isn't interesting based
779 upon the console log preferences.
780 If the preferences haven't been loaded loaded yet, display the
783 The default console_log_level preference value is such that only
784 ERROR, CRITICAL and WARNING level messages are processed;
785 MESSAGE, INFO and DEBUG level messages are ignored.
787 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
788 ERROR and CRITICAL level messages so the current code is a behavioral
789 change. The current behavior is the same as in Wireshark.
791 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
792 prefs.console_log_level != 0) {
796 g_log_default_handler(log_domain, log_level, message, user_data);
801 output_file_description(const char *fname)
803 char *save_file_string;
805 /* Get a string that describes what we're writing to */
806 if (strcmp(fname, "-") == 0) {
807 /* We're writing to the standard output */
808 save_file_string = g_strdup("standard output");
810 /* We're writing to a file with the name in save_file */
811 save_file_string = g_strdup_printf("file \"%s\"", fname);
813 return save_file_string;
817 print_current_user(void) {
818 gchar *cur_user, *cur_group;
820 if (started_with_special_privs()) {
821 cur_user = get_cur_username();
822 cur_group = get_cur_groupname();
823 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
824 cur_user, cur_group);
827 if (running_with_special_privs()) {
828 fprintf(stderr, " This could be dangerous.");
830 fprintf(stderr, "\n");
835 check_capture_privs(void) {
838 /* Warn the user if npf.sys isn't loaded. */
839 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
840 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
841 "capturing or\nlisting interfaces.\n");
847 show_version(GString *comp_info_str, GString *runtime_info_str)
849 printf("TShark " VERSION "%s\n"
856 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
857 runtime_info_str->str);
861 main(int argc, char *argv[])
863 char *init_progfile_dir_error;
865 gboolean arg_error = FALSE;
871 char *gpf_path, *pf_path;
872 char *gdp_path, *dp_path;
873 int gpf_open_errno, gpf_read_errno;
874 int pf_open_errno, pf_read_errno;
875 int gdp_open_errno, gdp_read_errno;
876 int dp_open_errno, dp_read_errno;
878 volatile int exit_status = 0;
880 gboolean list_link_layer_types = FALSE;
881 gboolean start_capture = FALSE;
886 gboolean capture_option_specified = FALSE;
888 gboolean quiet = FALSE;
889 #ifdef PCAP_NG_DEFAULT
890 volatile int out_file_type = WTAP_FILE_PCAPNG;
892 volatile int out_file_type = WTAP_FILE_PCAP;
894 volatile gboolean out_file_name_res = FALSE;
895 gchar *volatile cf_name = NULL;
896 gchar *rfilter = NULL;
897 #ifdef HAVE_PCAP_OPEN_DEAD
898 struct bpf_program fcode;
900 dfilter_t *rfcode = NULL;
903 GLogLevelFlags log_flags;
905 gchar *output_only = NULL;
907 #ifdef HAVE_PCAP_REMOTE
908 #define OPTSTRING_A "A:"
910 #define OPTSTRING_A ""
913 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
914 #define OPTSTRING_B "B:"
916 #define OPTSTRING_B ""
917 #endif /* _WIN32 or HAVE_PCAP_CREATE */
918 #else /* HAVE_LIBPCAP */
919 #define OPTSTRING_B ""
920 #endif /* HAVE_LIBPCAP */
922 #ifdef HAVE_PCAP_CREATE
923 #define OPTSTRING_I "I"
925 #define OPTSTRING_I ""
928 #define OPTSTRING "2a:" OPTSTRING_A "b:" OPTSTRING_B "c:C:d:De:E:f:F:gG:hH:i:" OPTSTRING_I "K:lLnN:o:O:pPqQr:R:s:S:t:T:u:vVw:W:xX:y:z:"
930 static const char optstring[] = OPTSTRING;
933 arg_list_utf_16to8(argc, argv);
934 #if !GLIB_CHECK_VERSION(2,31,0)
940 * Get credential information for later use.
942 init_process_policies();
945 * Attempt to get the pathname of the executable file.
947 init_progfile_dir_error = init_progfile_dir(argv[0], main);
948 if (init_progfile_dir_error != NULL) {
949 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
950 init_progfile_dir_error);
954 * In order to have the -X opts assigned before the wslua machine starts
955 * we need to call getopts before epan_init() gets called.
958 optind_initial = optind;
960 while ((opt = getopt(argc, argv, optstring)) != -1) {
962 case 'C': /* Configuration Profile */
963 if (profile_exists (optarg, FALSE)) {
964 set_profile_name (optarg);
966 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
970 case 'P': /* Print packet summary info even when writing to a file */
971 print_packet_info = TRUE;
972 print_summary = TRUE;
974 case 'O': /* Only output these protocols */
975 output_only = g_strdup(optarg);
977 case 'V': /* Verbose */
978 print_details = TRUE;
979 print_packet_info = TRUE;
981 case 'x': /* Print packet data in hex (and ASCII) */
983 /* The user asked for hex output, so let's ensure they get it,
984 * even if they're writing to a file.
986 print_packet_info = TRUE;
997 * Print packet summary information is the default, unless either -V or -x
998 * were specified and -P was not. Note that this is new behavior, which
999 * allows for the possibility of printing only hex/ascii output without
1000 * necessarily requiring that either the summary or details be printed too.
1002 if (print_summary == -1)
1003 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1005 optind = optind_initial;
1010 /** Send All g_log messages to our own handler **/
1014 G_LOG_LEVEL_CRITICAL|
1015 G_LOG_LEVEL_WARNING|
1016 G_LOG_LEVEL_MESSAGE|
1019 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1021 g_log_set_handler(NULL,
1023 tshark_log_handler, NULL /* user_data */);
1024 g_log_set_handler(LOG_DOMAIN_MAIN,
1026 tshark_log_handler, NULL /* user_data */);
1029 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1031 tshark_log_handler, NULL /* user_data */);
1032 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1034 tshark_log_handler, NULL /* user_data */);
1037 initialize_funnel_ops();
1040 capture_opts_init(&global_capture_opts, &cfile);
1043 timestamp_set_type(TS_RELATIVE);
1044 timestamp_set_precision(TS_PREC_AUTO);
1045 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1047 /* Register all dissectors; we must do this before checking for the
1048 "-G" flag, as the "-G" flag dumps information registered by the
1049 dissectors, and we must do it before we read the preferences, in
1050 case any dissectors register preferences. */
1051 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1052 failure_message, open_failure_message, read_failure_message,
1053 write_failure_message);
1055 /* Register all tap listeners; we do this before we parse the arguments,
1056 as the "-z" argument can specify a registered tap. */
1058 /* we register the plugin taps before the other taps because
1059 stats_tree taps plugins will be registered as tap listeners
1060 by stats_tree_stat.c and need to registered before that */
1062 register_all_plugin_tap_listeners();
1064 register_all_tap_listeners();
1066 /* If invoked with the "-G" flag, we dump out information based on
1067 the argument to the "-G" flag; if no argument is specified,
1068 for backwards compatibility we dump out a glossary of display
1071 XXX - we do this here, for now, to support "-G" with no arguments.
1072 If none of our build or other processes uses "-G" with no arguments,
1073 we can just process it with the other arguments. */
1074 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1075 proto_initialize_all_prefixes();
1078 proto_registrar_dump_fields(1);
1080 if (strcmp(argv[2], "fields") == 0)
1081 proto_registrar_dump_fields(1);
1082 else if (strcmp(argv[2], "fields2") == 0)
1083 proto_registrar_dump_fields(2);
1084 else if (strcmp(argv[2], "fields3") == 0)
1085 proto_registrar_dump_fields(3);
1086 else if (strcmp(argv[2], "protocols") == 0)
1087 proto_registrar_dump_protocols();
1088 else if (strcmp(argv[2], "values") == 0)
1089 proto_registrar_dump_values();
1090 else if (strcmp(argv[2], "ftypes") == 0)
1091 proto_registrar_dump_ftypes();
1092 else if (strcmp(argv[2], "decodes") == 0)
1093 dissector_dump_decodes();
1094 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1095 dissector_dump_heur_decodes();
1096 else if (strcmp(argv[2], "defaultprefs") == 0)
1098 else if (strcmp(argv[2], "plugins") == 0)
1100 else if (strcmp(argv[2], "?") == 0)
1101 glossary_option_help();
1102 else if (strcmp(argv[2], "-?") == 0)
1103 glossary_option_help();
1104 else if (strcmp(argv[2], "currentprefs") == 0) {
1105 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1106 &pf_open_errno, &pf_read_errno, &pf_path);
1109 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1116 /* Set the C-language locale to the native environment. */
1117 setlocale(LC_ALL, "");
1119 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1120 &pf_open_errno, &pf_read_errno, &pf_path);
1121 if (gpf_path != NULL) {
1122 if (gpf_open_errno != 0) {
1123 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1124 pf_path, g_strerror(gpf_open_errno));
1126 if (gpf_read_errno != 0) {
1127 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1128 pf_path, g_strerror(gpf_read_errno));
1131 if (pf_path != NULL) {
1132 if (pf_open_errno != 0) {
1133 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1134 g_strerror(pf_open_errno));
1136 if (pf_read_errno != 0) {
1137 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1138 pf_path, g_strerror(pf_read_errno));
1144 /* Read the disabled protocols file. */
1145 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1146 &dp_path, &dp_open_errno, &dp_read_errno);
1147 if (gdp_path != NULL) {
1148 if (gdp_open_errno != 0) {
1149 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1150 gdp_path, g_strerror(gdp_open_errno));
1152 if (gdp_read_errno != 0) {
1153 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1154 gdp_path, g_strerror(gdp_read_errno));
1158 if (dp_path != NULL) {
1159 if (dp_open_errno != 0) {
1161 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1162 g_strerror(dp_open_errno));
1164 if (dp_read_errno != 0) {
1166 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1167 g_strerror(dp_read_errno));
1172 check_capture_privs();
1174 cap_file_init(&cfile);
1176 /* Print format defaults to this. */
1177 print_format = PR_FMT_TEXT;
1179 output_fields = output_fields_new();
1181 /* Now get our args */
1182 while ((opt = getopt(argc, argv, optstring)) != -1) {
1184 case '2': /* Perform two pass analysis */
1185 perform_two_pass_analysis = TRUE;
1187 case 'a': /* autostop criteria */
1188 case 'b': /* Ringbuffer option */
1189 case 'c': /* Capture x packets */
1190 case 'f': /* capture filter */
1191 case 'g': /* enable group read access on file(s) */
1192 case 'i': /* Use interface x */
1193 case 'p': /* Don't capture in promiscuous mode */
1194 #ifdef HAVE_PCAP_REMOTE
1195 case 'A': /* Authentication */
1197 #ifdef HAVE_PCAP_CREATE
1198 case 'I': /* Capture in monitor mode, if available */
1200 case 's': /* Set the snapshot (capture) length */
1201 case 'w': /* Write to capture file x */
1202 case 'y': /* Set the pcap data link type */
1203 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1204 case 'B': /* Buffer size */
1205 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1207 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1212 capture_option_specified = TRUE;
1217 /* Configuration profile settings were already processed just ignore them this time*/
1219 case 'd': /* Decode as rule */
1220 if (!add_decode_as(optarg))
1223 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1224 case 'K': /* Kerberos keytab file */
1225 read_keytab_file(optarg);
1228 case 'D': /* Print a list of capture devices and exit */
1230 if_list = capture_interface_list(&err, &err_str);
1231 if (if_list == NULL) {
1233 case CANT_GET_INTERFACE_LIST:
1234 case DONT_HAVE_PCAP:
1235 cmdarg_err("%s", err_str);
1239 case NO_INTERFACES_FOUND:
1240 cmdarg_err("There are no interfaces on which a capture can be done");
1245 capture_opts_print_interfaces(if_list);
1246 free_interface_list(if_list);
1249 capture_option_specified = TRUE;
1255 output_fields_add(output_fields, optarg);
1259 if (!output_fields_set_option(output_fields, optarg)) {
1260 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1261 output_fields_list_options(stderr);
1266 out_file_type = wtap_short_string_to_file_type(optarg);
1267 if (out_file_type < 0) {
1268 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1269 list_capture_types();
1273 case 'W': /* Select extra information to save in our capture file */
1274 /* This is patterned after the -N flag which may not be the best idea. */
1275 if (strchr(optarg, 'n')) {
1276 out_file_name_res = TRUE;
1278 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1282 case 'H': /* Read address to name mappings from a hosts file */
1283 if (! add_hosts_file(optarg))
1285 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1288 out_file_name_res = TRUE;
1291 case 'h': /* Print help and exit */
1295 case 'l': /* "Line-buffer" standard output */
1296 /* This isn't line-buffering, strictly speaking, it's just
1297 flushing the standard output after the information for
1298 each packet is printed; however, that should be good
1299 enough for all the purposes to which "-l" is put (and
1300 is probably actually better for "-V", as it does fewer
1303 See the comment in "process_packet()" for an explanation of
1304 why we do that, and why we don't just use "setvbuf()" to
1305 make the standard output line-buffered (short version: in
1306 Windows, "line-buffered" is the same as "fully-buffered",
1307 and the output buffer is only flushed when it fills up). */
1308 line_buffered = TRUE;
1310 case 'L': /* Print list of link-layer types and exit */
1312 list_link_layer_types = TRUE;
1314 capture_option_specified = TRUE;
1318 case 'n': /* No name resolution */
1319 gbl_resolv_flags.mac_name = FALSE;
1320 gbl_resolv_flags.network_name = FALSE;
1321 gbl_resolv_flags.transport_name = FALSE;
1322 gbl_resolv_flags.concurrent_dns = FALSE;
1324 case 'N': /* Select what types of addresses/port #s to resolve */
1325 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1326 if (badopt != '\0') {
1327 cmdarg_err("-N specifies unknown resolving option '%c';",
1329 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1333 case 'o': /* Override preference from command line */
1334 switch (prefs_set_pref(optarg)) {
1339 case PREFS_SET_SYNTAX_ERR:
1340 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1344 case PREFS_SET_NO_SUCH_PREF:
1345 case PREFS_SET_OBSOLETE:
1346 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1351 case 'q': /* Quiet */
1354 case 'Q': /* Really quiet */
1356 really_quiet = TRUE;
1358 case 'r': /* Read capture file x */
1359 cf_name = g_strdup(optarg);
1361 case 'R': /* Read file filter */
1365 /* already processed; just ignore it now */
1367 case 'S': /* Set the line Separator to be printed between packets */
1368 separator = strdup(optarg);
1370 case 't': /* Time stamp type */
1371 if (strcmp(optarg, "r") == 0)
1372 timestamp_set_type(TS_RELATIVE);
1373 else if (strcmp(optarg, "a") == 0)
1374 timestamp_set_type(TS_ABSOLUTE);
1375 else if (strcmp(optarg, "ad") == 0)
1376 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1377 else if (strcmp(optarg, "d") == 0)
1378 timestamp_set_type(TS_DELTA);
1379 else if (strcmp(optarg, "dd") == 0)
1380 timestamp_set_type(TS_DELTA_DIS);
1381 else if (strcmp(optarg, "e") == 0)
1382 timestamp_set_type(TS_EPOCH);
1383 else if (strcmp(optarg, "u") == 0)
1384 timestamp_set_type(TS_UTC);
1385 else if (strcmp(optarg, "ud") == 0)
1386 timestamp_set_type(TS_UTC_WITH_DATE);
1388 cmdarg_err("Invalid time stamp type \"%s\"",
1390 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1391 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1395 case 'T': /* printing Type */
1396 if (strcmp(optarg, "text") == 0) {
1397 output_action = WRITE_TEXT;
1398 print_format = PR_FMT_TEXT;
1399 } else if (strcmp(optarg, "ps") == 0) {
1400 output_action = WRITE_TEXT;
1401 print_format = PR_FMT_PS;
1402 } else if (strcmp(optarg, "pdml") == 0) {
1403 output_action = WRITE_XML;
1404 print_details = TRUE; /* Need details */
1405 print_summary = FALSE; /* Don't allow summary */
1406 } else if (strcmp(optarg, "psml") == 0) {
1407 output_action = WRITE_XML;
1408 print_details = FALSE; /* Don't allow details */
1409 print_summary = TRUE; /* Need summary */
1410 } else if (strcmp(optarg, "fields") == 0) {
1411 output_action = WRITE_FIELDS;
1412 print_details = TRUE; /* Need full tree info */
1413 print_summary = FALSE; /* Don't allow summary */
1415 cmdarg_err("Invalid -T parameter.");
1416 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1420 case 'u': /* Seconds type */
1421 if (strcmp(optarg, "s") == 0)
1422 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1423 else if (strcmp(optarg, "hms") == 0)
1424 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1426 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1427 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1431 case 'v': /* Show version and exit */
1433 GString *comp_info_str;
1434 GString *runtime_info_str;
1435 /* Assemble the compile-time version information string */
1436 comp_info_str = g_string_new("Compiled ");
1437 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
1439 /* Assemble the run-time version information string */
1440 runtime_info_str = g_string_new("Running ");
1441 get_runtime_version_info(runtime_info_str, NULL);
1442 show_version(comp_info_str, runtime_info_str);
1443 g_string_free(comp_info_str, TRUE);
1444 g_string_free(runtime_info_str, TRUE);
1447 case 'O': /* Only output these protocols */
1448 /* already processed; just ignore it now */
1450 case 'V': /* Verbose */
1451 /* already processed; just ignore it now */
1453 case 'x': /* Print packet data in hex (and ASCII) */
1454 /* already processed; just ignore it now */
1459 /* We won't call the init function for the stat this soon
1460 as it would disallow MATE's fields (which are registered
1461 by the preferences set callback) from being used as
1462 part of a tap filter. Instead, we just add the argument
1463 to a list of stat arguments. */
1464 if (!process_stat_cmd_arg(optarg)) {
1465 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1466 cmdarg_err_cont(" -z argument must be one of :");
1467 list_stat_cmd_args();
1472 case '?': /* Bad flag - print usage message */
1475 list_capture_types();
1485 /* If we specified output fields, but not the output field type... */
1486 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1487 cmdarg_err("Output fields were specified with \"-e\", "
1488 "but \"-Tfields\" was not specified.");
1490 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1491 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1492 "specified with \"-e\".");
1497 /* If no capture filter or read filter has been specified, and there are
1498 still command-line arguments, treat them as the tokens of a capture
1499 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1500 flag was specified. */
1501 if (optind < argc) {
1502 if (cf_name != NULL) {
1503 if (rfilter != NULL) {
1504 cmdarg_err("Read filters were specified both with \"-R\" "
1505 "and with additional command-line arguments.");
1508 rfilter = get_args_as_string(argc, argv, optind);
1513 if (global_capture_opts.default_options.cfilter) {
1514 cmdarg_err("A default capture filter was specified both with \"-f\""
1515 " and with additional command-line arguments.");
1518 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1519 interface_options interface_opts;
1520 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1521 if (interface_opts.cfilter == NULL) {
1522 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1523 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1524 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1526 cmdarg_err("A capture filter was specified both with \"-f\""
1527 " and with additional command-line arguments.");
1531 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1533 capture_option_specified = TRUE;
1539 if (!global_capture_opts.saving_to_file) {
1540 /* We're not saving the capture to a file; if "-q" wasn't specified,
1541 we should print packet information */
1543 print_packet_info = TRUE;
1545 /* We're saving to a file; if we're writing to the standard output.
1546 and we'll also be writing dissected packets to the standard
1547 output, reject the request. At best, we could redirect that
1548 to the standard error; we *can't* write both to the standard
1549 output and have either of them be useful. */
1550 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1551 cmdarg_err("You can't write both raw packet data and dissected packets"
1552 " to the standard output.");
1557 /* We're not saving the capture to a file; if "-q" wasn't specified,
1558 we should print packet information */
1560 print_packet_info = TRUE;
1563 #ifndef HAVE_LIBPCAP
1564 if (capture_option_specified)
1565 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1572 /* We don't support capture filters when reading from a capture file
1573 (the BPF compiler doesn't support all link-layer types that we
1574 support in capture files we read). */
1576 if (cf_name != NULL) {
1577 if (global_capture_opts.default_options.cfilter) {
1578 cmdarg_err("Only read filters, not capture filters, "
1579 "can be specified when reading a capture file.");
1586 if (output_action != WRITE_TEXT) {
1587 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1592 if (output_only != NULL) {
1595 if (!print_details) {
1596 cmdarg_err("-O requires -V");
1600 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1601 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1602 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1607 if (list_link_layer_types) {
1608 /* We're supposed to list the link-layer types for an interface;
1609 did the user also specify a capture file to be read? */
1611 /* Yes - that's bogus. */
1612 cmdarg_err("You can't specify -L and a capture file to be read.");
1615 /* No - did they specify a ring buffer option? */
1616 if (global_capture_opts.multi_files_on) {
1617 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1623 * "-r" was specified, so we're reading a capture file.
1624 * Capture options don't apply here.
1626 if (global_capture_opts.multi_files_on) {
1627 cmdarg_err("Multiple capture files requested, but "
1628 "a capture isn't being done.");
1631 if (global_capture_opts.has_file_duration) {
1632 cmdarg_err("Switching capture files after a time interval was specified, but "
1633 "a capture isn't being done.");
1636 if (global_capture_opts.has_ring_num_files) {
1637 cmdarg_err("A ring buffer of capture files was specified, but "
1638 "a capture isn't being done.");
1641 if (global_capture_opts.has_autostop_files) {
1642 cmdarg_err("A maximum number of capture files was specified, but "
1643 "a capture isn't being done.");
1647 /* Note: TShark now allows the restriction of a _read_ file by packet count
1648 * and byte count as well as a write file. Other autostop options remain valid
1649 * only for a write file.
1651 if (global_capture_opts.has_autostop_duration) {
1652 cmdarg_err("A maximum capture time was specified, but "
1653 "a capture isn't being done.");
1658 * "-r" wasn't specified, so we're doing a live capture.
1660 if (global_capture_opts.saving_to_file) {
1661 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1663 /* When capturing, we only support writing pcap or pcap-ng format. */
1664 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1665 cmdarg_err("Live captures can only be saved in libpcap format.");
1668 if (global_capture_opts.multi_files_on) {
1669 /* Multiple-file mode doesn't work under certain conditions:
1670 a) it doesn't work if you're writing to the standard output;
1671 b) it doesn't work if you're writing to a pipe;
1673 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1674 cmdarg_err("Multiple capture files requested, but "
1675 "the capture is being written to the standard output.");
1678 if (global_capture_opts.output_to_pipe) {
1679 cmdarg_err("Multiple capture files requested, but "
1680 "the capture file is a pipe.");
1683 if (!global_capture_opts.has_autostop_filesize &&
1684 !global_capture_opts.has_file_duration) {
1685 cmdarg_err("Multiple capture files requested, but "
1686 "no maximum capture file size or duration was specified.");
1690 /* Currently, we don't support read filters when capturing
1691 and saving the packets. */
1692 if (rfilter != NULL) {
1693 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1697 /* They didn't specify a "-w" flag, so we won't be saving to a
1698 capture file. Check for options that only make sense if
1699 we're saving to a file. */
1700 if (global_capture_opts.has_autostop_filesize) {
1701 cmdarg_err("Maximum capture file size specified, but "
1702 "capture isn't being saved to a file.");
1705 if (global_capture_opts.multi_files_on) {
1706 cmdarg_err("Multiple capture files requested, but "
1707 "the capture isn't being saved to a file.");
1716 /* Start windows sockets */
1717 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1720 /* Notify all registered modules that have had any of their preferences
1721 changed either from one of the preferences file or from the command
1722 line that their preferences have changed. */
1725 /* At this point MATE will have registered its field array so we can
1726 have a tap filter with one of MATE's late-registered fields as part
1727 of the filter. We can now process all the "-z" arguments. */
1728 start_requested_stats();
1731 /* We currently don't support taps, or printing dissected packets,
1732 if we're writing to a pipe. */
1733 if (global_capture_opts.saving_to_file &&
1734 global_capture_opts.output_to_pipe) {
1735 if (tap_listeners_require_dissection()) {
1736 cmdarg_err("Taps aren't supported when saving to a pipe.");
1739 if (print_packet_info) {
1740 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1746 /* disabled protocols as per configuration file */
1747 if (gdp_path == NULL && dp_path == NULL) {
1748 set_disabled_protos_list();
1751 /* Build the column format array */
1752 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1755 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1756 capture_opts_trim_ring_num_files(&global_capture_opts);
1759 if (rfilter != NULL) {
1760 if (!dfilter_compile(rfilter, &rfcode)) {
1761 cmdarg_err("%s", dfilter_error_msg);
1763 #ifdef HAVE_PCAP_OPEN_DEAD
1767 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1769 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1771 " Note: That display filter code looks like a valid capture filter;");
1773 " maybe you mixed them up?");
1782 cfile.rfcode = rfcode;
1784 if (print_packet_info) {
1785 /* If we're printing as text or PostScript, we have
1786 to create a print stream. */
1787 if (output_action == WRITE_TEXT) {
1788 switch (print_format) {
1791 print_stream = print_stream_text_stdio_new(stdout);
1795 print_stream = print_stream_ps_stdio_new(stdout);
1799 g_assert_not_reached();
1804 /* We have to dissect each packet if:
1806 we're printing information about each packet;
1808 we're using a read filter on the packets;
1810 we're using any taps that need dissection. */
1811 do_dissection = print_packet_info || rfcode || tap_listeners_require_dissection();
1815 * We're reading a capture file.
1819 * Immediately relinquish any special privileges we have; we must not
1820 * be allowed to read any capture files the user running TShark
1823 relinquish_special_privs_perm();
1824 print_current_user();
1826 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1831 /* Set timestamp precision; there should arguably be a command-line
1832 option to let the user set this. */
1833 switch(wtap_file_tsprecision(cfile.wth)) {
1834 case(WTAP_FILE_TSPREC_SEC):
1835 timestamp_set_precision(TS_PREC_AUTO_SEC);
1837 case(WTAP_FILE_TSPREC_DSEC):
1838 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1840 case(WTAP_FILE_TSPREC_CSEC):
1841 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1843 case(WTAP_FILE_TSPREC_MSEC):
1844 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1846 case(WTAP_FILE_TSPREC_USEC):
1847 timestamp_set_precision(TS_PREC_AUTO_USEC);
1849 case(WTAP_FILE_TSPREC_NSEC):
1850 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1853 g_assert_not_reached();
1856 /* Process the packets in the file */
1859 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1860 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1861 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1863 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1866 CATCH(OutOfMemoryError) {
1870 "Sorry, but TShark has to terminate now!\n"
1872 "Some infos / workarounds can be found at:\n"
1873 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1878 /* We still dump out the results of taps, etc., as we might have
1879 read some packets; however, we exit with an error status. */
1883 /* No capture file specified, so we're supposed to do a live capture
1884 (or get a list of link-layer types for a live capture device);
1885 do we have support for live captures? */
1887 /* trim the interface name and exit if that failed */
1888 exit_status = capture_opts_trim_iface(&global_capture_opts,
1889 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1890 if (exit_status != 0)
1893 /* if requested, list the link layer types and exit */
1894 if (list_link_layer_types) {
1897 /* Get the list of link-layer types for the capture devices. */
1898 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1899 interface_options interface_opts;
1900 if_capabilities_t *caps;
1902 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1903 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1905 cmdarg_err("%s", err_str);
1909 if (caps->data_link_types == NULL) {
1910 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1913 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1914 free_if_capabilities(caps);
1919 if (print_packet_info) {
1920 if (!write_preamble(NULL)) {
1921 show_print_file_io_error(errno);
1924 } else if (!quiet) {
1926 * We're not printing information for each packet, and the user
1927 * didn't ask us not to print a count of packets as they arrive,
1928 * so print that count so the user knows that packets are arriving.
1930 * XXX - what if the user wants to do a live capture, doesn't want
1931 * to save it to a file, doesn't want information printed for each
1932 * packet, does want some "-z" statistic, and wants packet counts
1933 * so they know whether they're seeing any packets?
1935 print_packet_counts = TRUE;
1938 /* For now, assume libpcap gives microsecond precision. */
1939 timestamp_set_precision(TS_PREC_AUTO_USEC);
1942 * XXX - this returns FALSE if an error occurred, but it also
1943 * returns FALSE if the capture stops because a time limit
1944 * was reached (and possibly other limits), so we can't assume
1945 * it means an error.
1947 * The capture code is a bit twisty, so it doesn't appear to
1948 * be an easy fix. We just ignore the return value for now.
1949 * Instead, pass on the exit status from the capture child.
1952 exit_status = global_capture_opts.fork_child_status;
1954 if (print_packet_info) {
1955 if (!write_finale()) {
1957 show_print_file_io_error(err);
1961 /* No - complain. */
1962 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1969 if (cfile.frames != NULL) {
1970 free_frame_data_sequence(cfile.frames);
1971 cfile.frames = NULL;
1974 draw_tap_listeners(TRUE);
1975 funnel_dump_all_text_windows();
1978 output_fields_free(output_fields);
1979 output_fields = NULL;
1984 /*#define USE_BROKEN_G_MAIN_LOOP*/
1986 #ifdef USE_BROKEN_G_MAIN_LOOP
1989 gboolean loop_running = FALSE;
1991 guint32 packet_count = 0;
1994 /* XXX - move to the right position / file */
1995 /* read from a pipe (callback) */
1996 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1998 typedef struct pipe_input_tag {
2002 pipe_input_cb_t input_cb;
2003 guint pipe_input_id;
2005 GMutex *callback_running;
2009 static pipe_input_t pipe_input;
2012 /* The timer has expired, see if there's stuff to read from the pipe,
2013 if so, do the callback */
2015 pipe_timer_cb(gpointer data)
2021 pipe_input_t *pipe_input_p = data;
2022 gint iterations = 0;
2024 g_mutex_lock (pipe_input_p->callback_running);
2026 /* try to read data from the pipe only 5 times, to avoid blocking */
2027 while(iterations < 5) {
2028 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2030 /* Oddly enough although Named pipes don't work on win9x,
2031 PeekNamedPipe does !!! */
2032 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2033 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2035 /* Get the child process exit status */
2036 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2039 /* If the Peek returned an error, or there are bytes to be read
2040 or the childwatcher thread has terminated then call the normal
2042 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2044 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2046 /* And call the real handler */
2047 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2048 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2049 /* pipe closed, return false so that the timer is stopped */
2050 g_mutex_unlock (pipe_input_p->callback_running);
2055 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2056 /* No data, stop now */
2063 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2065 g_mutex_unlock (pipe_input_p->callback_running);
2067 /* we didn't stopped the timer, so let it run */
2074 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2077 pipe_input.source = source;
2078 pipe_input.child_process = child_process;
2079 pipe_input.user_data = user_data;
2080 pipe_input.input_cb = input_cb;
2083 #if GLIB_CHECK_VERSION(2,31,0)
2084 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2085 g_mutex_init(pipe_input.callback_running);
2087 pipe_input.callback_running = g_mutex_new();
2089 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2090 do this but that doesn't cover all win32 platforms. GTK can do
2091 this but doesn't seem to work over processes. Attempt to do
2092 something similar here, start a timer and check for data on every
2094 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2095 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2106 GString *str = g_string_new("");
2107 #ifdef USE_TSHARK_SELECT
2111 struct sigaction action, oldaction;
2115 * XXX - dropping privileges is still required, until code cleanup is done
2117 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2118 * when it's done, we don't need special privileges to run tshark at all,
2119 * therefore we don't need to drop these privileges
2120 * The only thing we might want to keep is a warning if tshark is run as root,
2121 * as it's no longer necessary and potentially dangerous.
2123 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2124 * We've opened the capture device, so we shouldn't need any special
2125 * privileges any more; relinquish those privileges.
2127 * XXX - if we have saved set-user-ID support, we should give up those
2128 * privileges immediately, and then reclaim them long enough to get
2129 * a list of network interfaces and to open one, and then give them
2130 * up again, so that stuff we do while processing the argument list,
2131 * reading the user's preferences, loading and starting plugins
2132 * (especially *user* plugins), etc. is done with the user's privileges,
2133 * not special privileges.
2135 relinquish_special_privs_perm();
2136 print_current_user();
2138 /* Cleanup all data structures used for dissection. */
2139 cleanup_dissection();
2140 /* Initialize all data structures used for dissection. */
2144 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2145 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2147 /* Catch SIGINT and SIGTERM and, if we get either of them,
2148 clean up and exit. If SIGHUP isn't being ignored, catch
2149 it too and, if we get it, clean up and exit.
2151 We restart any read that was in progress, so that it doesn't
2152 disrupt reading from the sync pipe. The signal handler tells
2153 the capture child to finish; it will report that it finished,
2154 or will exit abnormally, so we'll stop reading from the sync
2155 pipe, pick up the exit status, and quit. */
2156 memset(&action, 0, sizeof(action));
2157 action.sa_handler = capture_cleanup;
2158 action.sa_flags = SA_RESTART;
2159 sigemptyset(&action.sa_mask);
2160 sigaction(SIGTERM, &action, NULL);
2161 sigaction(SIGINT, &action, NULL);
2162 sigaction(SIGHUP, NULL, &oldaction);
2163 if (oldaction.sa_handler == SIG_DFL)
2164 sigaction(SIGHUP, &action, NULL);
2167 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2168 quiet mode, report the number of packets we've captured.
2170 Again, restart any read that was in progress, so that it doesn't
2171 disrupt reading from the sync pipe. */
2172 action.sa_handler = report_counts_siginfo;
2173 action.sa_flags = SA_RESTART;
2174 sigemptyset(&action.sa_mask);
2175 sigaction(SIGINFO, &action, NULL);
2176 #endif /* SIGINFO */
2179 global_capture_opts.state = CAPTURE_PREPARING;
2181 /* Let the user know which interfaces were chosen. */
2182 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2183 interface_options interface_opts;
2185 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2186 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2187 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2188 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2191 if (global_capture_opts.ifaces->len < 2) {
2193 if (global_capture_opts.ifaces->len < 4) {
2195 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2196 interface_options interface_opts;
2198 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2200 if (global_capture_opts.ifaces->len > 2) {
2201 g_string_append_printf(str, ",");
2203 g_string_append_printf(str, " ");
2204 if (i == global_capture_opts.ifaces->len - 1) {
2205 g_string_append_printf(str, "and ");
2208 g_string_append_printf(str, "'%s'", interface_opts.descr);
2211 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2213 if (really_quiet == FALSE)
2214 fprintf(stderr, "Capturing on %s\n", str->str);
2216 g_string_free(str, TRUE);
2218 ret = sync_pipe_start(&global_capture_opts);
2223 /* the actual capture loop
2225 * XXX - glib doesn't seem to provide any event based loop handling.
2227 * XXX - for whatever reason,
2228 * calling g_main_loop_new() ends up in 100% cpu load.
2230 * But that doesn't matter: in UNIX we can use select() to find an input
2231 * source with something to do.
2233 * But that doesn't matter because we're in a CLI (that doesn't need to
2234 * update a GUI or something at the same time) so it's OK if we block
2235 * trying to read from the pipe.
2237 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2238 * wrong (but I leave it there in case I am...).
2241 #ifdef USE_TSHARK_SELECT
2243 FD_SET(pipe_input.source, &readfds);
2246 loop_running = TRUE;
2250 while (loop_running)
2252 #ifdef USE_TSHARK_SELECT
2253 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2259 } else if (ret == 1) {
2261 /* Call the real handler */
2262 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2263 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2266 #ifdef USE_TSHARK_SELECT
2271 CATCH(OutOfMemoryError) {
2275 "Sorry, but TShark has to terminate now!\n"
2277 "Some infos / workarounds can be found at:\n"
2278 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2286 /* XXX - move the call to main_window_update() out of capture_sync.c */
2287 /* dummy for capture_sync.c to make linker happy */
2288 void main_window_update(void)
2292 /* capture child detected an error */
2294 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2296 cmdarg_err("%s", error_msg);
2297 cmdarg_err_cont("%s", secondary_error_msg);
2301 /* capture child detected an capture filter related error */
2303 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2305 dfilter_t *rfcode = NULL;
2306 interface_options interface_opts;
2308 g_assert(i < capture_opts->ifaces->len);
2309 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2311 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2313 "Invalid capture filter \"%s\" for interface %s!\n"
2315 "That string looks like a valid display filter; however, it isn't a valid\n"
2316 "capture filter (%s).\n"
2318 "Note that display filters and capture filters don't have the same syntax,\n"
2319 "so you can't use most display filter expressions as capture filters.\n"
2321 "See the User's Guide for a description of the capture filter syntax.",
2322 interface_opts.cfilter, interface_opts.descr, error_message);
2323 dfilter_free(rfcode);
2326 "Invalid capture filter \"%s\" for interface %s!\n"
2328 "That string isn't a valid capture filter (%s).\n"
2329 "See the User's Guide for a description of the capture filter syntax.",
2330 interface_opts.cfilter, interface_opts.descr, error_message);
2335 /* capture child tells us we have a new (or the first) capture file */
2337 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2339 gboolean is_tempfile;
2342 if (capture_opts->state == CAPTURE_PREPARING) {
2343 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2345 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2347 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2349 /* free the old filename */
2350 if (capture_opts->save_file != NULL) {
2352 /* we start a new capture file, close the old one (if we had one before) */
2353 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2354 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2355 wtap_close(((capture_file *) capture_opts->cf)->wth);
2357 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2360 g_free(capture_opts->save_file);
2361 is_tempfile = FALSE;
2363 /* we didn't had a save_file before, must be a tempfile */
2367 /* save the new filename */
2368 capture_opts->save_file = g_strdup(new_file);
2370 /* if we are in real-time mode, open the new file now */
2371 if (do_dissection) {
2372 /* Attempt to open the capture file and set up to read from it. */
2373 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2377 /* Don't unlink (delete) the save file - leave it around,
2378 for debugging purposes. */
2379 g_free(capture_opts->save_file);
2380 capture_opts->save_file = NULL;
2385 capture_opts->state = CAPTURE_RUNNING;
2391 /* capture child tells us we have new packets to read */
2393 capture_input_new_packets(capture_options *capture_opts, int to_read)
2399 capture_file *cf = capture_opts->cf;
2400 gboolean filtering_tap_listeners;
2405 * Prevent a SIGINFO handler from writing to the standard error while
2406 * we're doing so or writing to the standard output; instead, have it
2407 * just set a flag telling us to print that information when we're done.
2410 #endif /* SIGINFO */
2412 /* Do we have any tap listeners with filters? */
2413 filtering_tap_listeners = have_filtering_tap_listeners();
2415 /* Get the union of the flags for all tap listeners. */
2416 tap_flags = union_of_tap_listener_flags();
2418 if (do_dissection) {
2419 while (to_read-- && cf->wth) {
2420 wtap_cleareof(cf->wth);
2421 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2423 /* read from file failed, tell the capture child to stop */
2424 sync_pipe_stop(capture_opts);
2425 wtap_close(cf->wth);
2428 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2429 wtap_buf_ptr(cf->wth),
2430 filtering_tap_listeners, tap_flags);
2433 /* packet successfully read and gone through the "Read Filter" */
2439 * Dumpcap's doing all the work; we're not doing any dissection.
2440 * Count all the packets it wrote.
2442 packet_count += to_read;
2445 if (print_packet_counts) {
2446 /* We're printing packet counts. */
2447 if (packet_count != 0) {
2448 fprintf(stderr, "\r%u ", packet_count);
2449 /* stderr could be line buffered */
2456 * Allow SIGINFO handlers to write.
2461 * If a SIGINFO handler asked us to write out capture counts, do so.
2465 #endif /* SIGINFO */
2471 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2472 /* Report the count only if we aren't printing a packet count
2473 as packets arrive. */
2474 fprintf(stderr, "%u packet%s captured\n", packet_count,
2475 plurality(packet_count, "", "s"));
2478 infoprint = FALSE; /* we just reported it */
2479 #endif /* SIGINFO */
2484 report_counts_siginfo(int signum _U_)
2486 int sav_errno = errno;
2487 /* If we've been told to delay printing, just set a flag asking
2488 that we print counts (if we're supposed to), otherwise print
2489 the count of packets captured (if we're supposed to). */
2496 #endif /* SIGINFO */
2499 /* capture child detected any packet drops? */
2501 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2503 if (print_packet_counts) {
2504 /* We're printing packet counts to stderr.
2505 Send a newline so that we move to the line after the packet count. */
2506 fprintf(stderr, "\n");
2510 /* We're printing packet counts to stderr.
2511 Send a newline so that we move to the line after the packet count. */
2512 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2518 * Capture child closed its side of the pipe, report any error and
2519 * do the required cleanup.
2522 capture_input_closed(capture_options *capture_opts, gchar *msg)
2524 capture_file *cf = (capture_file *) capture_opts->cf;
2527 fprintf(stderr, "tshark: %s\n", msg);
2531 if (cf != NULL && cf->wth != NULL) {
2532 wtap_close(cf->wth);
2533 if (cf->is_tempfile) {
2534 ws_unlink(cf->filename);
2537 #ifdef USE_BROKEN_G_MAIN_LOOP
2538 /*g_main_loop_quit(loop);*/
2541 loop_running = FALSE;
2550 capture_cleanup(DWORD ctrltype _U_)
2552 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2553 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2554 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2555 like SIGTERM at least when the machine's shutting down.
2557 For now, we handle them all as indications that we should clean up
2558 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2561 We must return TRUE so that no other handler - such as one that would
2562 terminate the process - gets called.
2564 XXX - for some reason, typing ^C to TShark, if you run this in
2565 a Cygwin console window in at least some versions of Cygwin,
2566 causes TShark to terminate immediately; this routine gets
2567 called, but the main loop doesn't get a chance to run and
2568 exit cleanly, at least if this is compiled with Microsoft Visual
2569 C++ (i.e., it's a property of the Cygwin console window or Bash;
2570 it happens if TShark is not built with Cygwin - for all I know,
2571 building it with Cygwin may make the problem go away). */
2573 /* tell the capture child to stop */
2574 sync_pipe_stop(&global_capture_opts);
2576 /* don't stop our own loop already here, otherwise status messages and
2577 * cleanup wouldn't be done properly. The child will indicate the stop of
2578 * everything by calling capture_input_closed() later */
2584 capture_cleanup(int signum _U_)
2586 /* tell the capture child to stop */
2587 sync_pipe_stop(&global_capture_opts);
2589 /* don't stop our own loop already here, otherwise status messages and
2590 * cleanup wouldn't be done properly. The child will indicate the stop of
2591 * everything by calling capture_input_closed() later */
2594 #endif /* HAVE_LIBPCAP */
2597 process_packet_first_pass(capture_file *cf,
2598 gint64 offset, struct wtap_pkthdr *whdr,
2603 gboolean create_proto_tree = FALSE;
2607 /* The frame number of this packet is one more than the count of
2608 frames in this packet. */
2609 framenum = cf->count + 1;
2611 /* If we're not running a display filter and we're not printing any
2612 packet information, we don't need to do a dissection. This means
2613 that all packets can be marked as 'passed'. */
2616 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2618 /* If we're going to print packet information, or we're going to
2619 run a read filter, or we're going to process taps, set up to
2620 do a dissection and do so. */
2621 if (do_dissection) {
2622 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2623 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2624 /* Grab any resolved addresses */
2625 host_name_lookup_process();
2627 /* If we're going to be applying a read filter, we'll need to
2628 create a protocol tree against which to apply the filter. */
2630 create_proto_tree = TRUE;
2632 /* We're not going to display the protocol tree on this pass,
2633 so it's not going to be "visible". */
2634 epan_dissect_init(&edt, create_proto_tree, FALSE);
2636 /* If we're running a read filter, prime the epan_dissect_t with that
2639 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2641 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2642 &first_ts, prev_dis, prev_cap);
2644 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2646 /* Run the read filter if we have one. */
2648 passed = dfilter_apply_edt(cf->rfcode, &edt);
2652 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2653 prev_dis_frame = fdlocal;
2654 prev_dis = &prev_dis_frame;
2655 frame_data_sequence_add(cf->frames, &fdlocal);
2659 prev_cap_frame = fdlocal;
2660 prev_cap = &prev_cap_frame;
2663 epan_dissect_cleanup(&edt);
2669 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2670 struct wtap_pkthdr *phdr, const guchar *pd,
2671 gboolean filtering_tap_listeners, guint tap_flags)
2673 gboolean create_proto_tree;
2678 /* If we're not running a display filter and we're not printing any
2679 packet information, we don't need to do a dissection. This means
2680 that all packets can be marked as 'passed'. */
2683 /* If we're going to print packet information, or we're going to
2684 run a read filter, or we're going to process taps, set up to
2685 do a dissection and do so. */
2686 if (do_dissection) {
2687 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2688 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2689 /* Grab any resolved addresses */
2690 host_name_lookup_process();
2692 if (cf->rfcode || print_details || filtering_tap_listeners ||
2693 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2694 create_proto_tree = TRUE;
2696 create_proto_tree = FALSE;
2698 /* The protocol tree will be "visible", i.e., printed, only if we're
2699 printing packet details, which is true if we're printing stuff
2700 ("print_packet_info" is true) and we're in verbose mode
2701 ("packet_details" is true). */
2702 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2704 /* If we're running a read filter, prime the epan_dissect_t with that
2707 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2709 col_custom_prime_edt(&edt, &cf->cinfo);
2711 /* We only need the columns if either
2712 1) some tap needs the columns
2714 2) we're printing packet info but we're *not* verbose; in verbose
2715 mode, we print the protocol tree, not the protocol summary.
2717 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2722 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2724 /* Run the read filter if we have one. */
2726 passed = dfilter_apply_edt(cf->rfcode, &edt);
2730 /* Process this packet. */
2731 if (print_packet_info) {
2732 /* We're printing packet information; print the information for
2735 print_packet(cf, &edt);
2737 print_packet(cf, NULL);
2739 /* The ANSI C standard does not appear to *require* that a line-buffered
2740 stream be flushed to the host environment whenever a newline is
2741 written, it just says that, on such a stream, characters "are
2742 intended to be transmitted to or from the host environment as a
2743 block when a new-line character is encountered".
2745 The Visual C++ 6.0 C implementation doesn't do what is intended;
2746 even if you set a stream to be line-buffered, it still doesn't
2747 flush the buffer at the end of every line.
2749 So, if the "-l" flag was specified, we flush the standard output
2750 at the end of a packet. This will do the right thing if we're
2751 printing packet summary lines, and, as we print the entire protocol
2752 tree for a single packet without waiting for anything to happen,
2753 it should be as good as line-buffered mode if we're printing
2754 protocol trees. (The whole reason for the "-l" flag in either
2755 tcpdump or TShark is to allow the output of a live capture to
2756 be piped to a program or script and to have that script see the
2757 information for the packet as soon as it's printed, rather than
2758 having to wait until a standard I/O buffer fills up. */
2762 if (ferror(stdout)) {
2763 show_print_file_io_error(errno);
2769 if (do_dissection) {
2770 epan_dissect_cleanup(&edt);
2776 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2777 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2780 int snapshot_length;
2784 gchar *err_info = NULL;
2786 char *save_file_string = NULL;
2787 gboolean filtering_tap_listeners;
2789 wtapng_section_t *shb_hdr;
2790 wtapng_iface_descriptions_t *idb_inf;
2793 shb_hdr = wtap_file_get_shb_info(cf->wth);
2794 idb_inf = wtap_file_get_idb_info(cf->wth);
2795 #ifdef PCAP_NG_DEFAULT
2796 if (idb_inf->number_of_interfaces > 0) {
2797 linktype = WTAP_ENCAP_PER_PACKET;
2799 linktype = wtap_file_encap(cf->wth);
2802 linktype = wtap_file_encap(cf->wth);
2804 if (save_file != NULL) {
2805 /* Get a string that describes what we're writing to */
2806 save_file_string = output_file_description(save_file);
2808 /* Set up to write to the capture file. */
2809 snapshot_length = wtap_snapshot_length(cf->wth);
2810 if (snapshot_length == 0) {
2811 /* Snapshot length of input file not known. */
2812 snapshot_length = WTAP_MAX_PACKET_SIZE;
2814 /* If we don't have an application name add Tshark */
2815 if (shb_hdr->shb_user_appl == NULL) {
2816 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2817 shb_hdr->shb_user_appl = appname;
2820 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2821 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2827 /* We couldn't set up to write to the capture file. */
2830 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2831 cmdarg_err("Capture files can't be written in that format.");
2834 case WTAP_ERR_UNSUPPORTED_ENCAP:
2835 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2836 cmdarg_err("The capture file being read can't be written as a "
2837 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2840 case WTAP_ERR_CANT_OPEN:
2841 cmdarg_err("The %s couldn't be created for some "
2842 "unknown reason.", save_file_string);
2845 case WTAP_ERR_SHORT_WRITE:
2846 cmdarg_err("A full header couldn't be written to the %s.",
2851 cmdarg_err("The %s could not be created: %s.", save_file_string,
2852 wtap_strerror(err));
2858 if (print_packet_info) {
2859 if (!write_preamble(cf)) {
2861 show_print_file_io_error(err);
2868 if (pdh && out_file_name_res) {
2869 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2870 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2871 wtap_file_type_short_string(out_file_type));
2875 /* Do we have any tap listeners with filters? */
2876 filtering_tap_listeners = have_filtering_tap_listeners();
2878 /* Get the union of the flags for all tap listeners. */
2879 tap_flags = union_of_tap_listener_flags();
2881 if (perform_two_pass_analysis) {
2883 int old_max_packet_count = max_packet_count;
2885 /* Allocate a frame_data_sequence for all the frames. */
2886 cf->frames = new_frame_data_sequence();
2888 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2889 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2890 wtap_buf_ptr(cf->wth))) {
2891 /* Stop reading if we have the maximum number of packets;
2892 * When the -c option has not been used, max_packet_count
2893 * starts at 0, which practically means, never stop reading.
2894 * (unless we roll over max_packet_count ?)
2896 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2897 err = 0; /* This is not an error */
2903 /* Close the sequential I/O side, to free up memory it requires. */
2904 wtap_sequential_close(cf->wth);
2906 /* Allow the protocol dissectors to free up memory that they
2907 * don't need after the sequential run-through of the packets. */
2908 postseq_cleanup_all_protocols();
2910 max_packet_count = old_max_packet_count;
2912 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2913 fdata = frame_data_sequence_find(cf->frames, framenum);
2914 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2915 cf->pd, fdata->cap_len, &err, &err_info)) {
2916 if (process_packet_second_pass(cf, fdata,
2918 filtering_tap_listeners, tap_flags)) {
2919 /* Either there's no read filtering or this packet passed the
2920 filter, so, if we're writing to a capture file, write
2923 if (!wtap_dump(pdh, &cf->phdr, wtap_buf_ptr(cf->wth), &err)) {
2924 /* Error writing to a capture file */
2927 case WTAP_ERR_UNSUPPORTED_ENCAP:
2929 * This is a problem with the particular frame we're writing;
2930 * note that, and give the frame number.
2932 * XXX - framenum is not necessarily the frame number in
2933 * the input file if there was a read filter.
2936 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2937 framenum, cf->filename,
2938 wtap_file_type_short_string(out_file_type));
2942 show_capture_file_io_error(save_file, err, FALSE);
2945 wtap_dump_close(pdh, &err);
2950 /* Stop reading if we have the maximum number of packets;
2951 * When the -c option has not been used, max_packet_count
2952 * starts at 0, which practically means, never stop reading.
2953 * (unless we roll over max_packet_count ?)
2955 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2956 err = 0; /* This is not an error */
2965 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2968 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2969 wtap_buf_ptr(cf->wth),
2970 filtering_tap_listeners, tap_flags)) {
2971 /* Either there's no read filtering or this packet passed the
2972 filter, so, if we're writing to a capture file, write
2975 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
2976 /* Error writing to a capture file */
2979 case WTAP_ERR_UNSUPPORTED_ENCAP:
2981 * This is a problem with the particular frame we're writing;
2982 * note that, and give the frame number.
2985 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
2986 framenum, cf->filename,
2987 wtap_file_type_short_string(out_file_type));
2991 show_capture_file_io_error(save_file, err, FALSE);
2994 wtap_dump_close(pdh, &err);
2999 /* Stop reading if we have the maximum number of packets;
3000 * When the -c option has not been used, max_packet_count
3001 * starts at 0, which practically means, never stop reading.
3002 * (unless we roll over max_packet_count ?)
3004 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3005 err = 0; /* This is not an error */
3014 * Print a message noting that the read failed somewhere along the line.
3016 * If we're printing packet data, and the standard output and error are
3017 * going to the same place, flush the standard output, so everything
3018 * buffered up is written, and then print a newline to the standard error
3019 * before printing the error message, to separate it from the packet
3020 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3021 * the _fstat() documentation at Microsoft doesn't indicate whether
3022 * st_ino is even supported.)
3025 if (print_packet_info) {
3026 struct stat stat_stdout, stat_stderr;
3028 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3029 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3030 stat_stdout.st_ino == stat_stderr.st_ino) {
3032 fprintf(stderr, "\n");
3039 case WTAP_ERR_UNSUPPORTED:
3040 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3041 cf->filename, err_info);
3045 case WTAP_ERR_UNSUPPORTED_ENCAP:
3046 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3047 cf->filename, err_info);
3051 case WTAP_ERR_CANT_READ:
3052 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3056 case WTAP_ERR_SHORT_READ:
3057 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3061 case WTAP_ERR_BAD_FILE:
3062 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3063 cf->filename, err_info);
3067 case WTAP_ERR_DECOMPRESS:
3068 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3069 "(%s)", cf->filename, err_info);
3073 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3074 cf->filename, wtap_strerror(err));
3077 if (save_file != NULL) {
3078 /* Now close the capture file. */
3079 if (!wtap_dump_close(pdh, &err))
3080 show_capture_file_io_error(save_file, err, TRUE);
3083 if (save_file != NULL) {
3084 /* Now close the capture file. */
3085 if (!wtap_dump_close(pdh, &err))
3086 show_capture_file_io_error(save_file, err, TRUE);
3088 if (print_packet_info) {
3089 if (!write_finale()) {
3091 show_print_file_io_error(err);
3098 wtap_close(cf->wth);
3101 g_free(save_file_string);
3108 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3110 gboolean filtering_tap_listeners, guint tap_flags)
3113 gboolean create_proto_tree;
3118 /* Count this packet. */
3121 /* If we're not running a display filter and we're not printing any
3122 packet information, we don't need to do a dissection. This means
3123 that all packets can be marked as 'passed'. */
3126 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3128 /* If we're going to print packet information, or we're going to
3129 run a read filter, or we're going to process taps, set up to
3130 do a dissection and do so. */
3131 if (do_dissection) {
3132 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3133 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3134 /* Grab any resolved addresses */
3135 host_name_lookup_process();
3137 if (cf->rfcode || print_details || filtering_tap_listeners ||
3138 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3139 create_proto_tree = TRUE;
3141 create_proto_tree = FALSE;
3143 /* The protocol tree will be "visible", i.e., printed, only if we're
3144 printing packet details, which is true if we're printing stuff
3145 ("print_packet_info" is true) and we're in verbose mode
3146 ("packet_details" is true). */
3147 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3149 /* If we're running a read filter, prime the epan_dissect_t with that
3152 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3154 col_custom_prime_edt(&edt, &cf->cinfo);
3156 /* We only need the columns if either
3157 1) some tap needs the columns
3159 2) we're printing packet info but we're *not* verbose; in verbose
3160 mode, we print the protocol tree, not the protocol summary.
3162 3) there is a column mapped as an individual field */
3163 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3168 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3169 &first_ts, prev_dis, prev_cap);
3171 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3173 /* Run the read filter if we have one. */
3175 passed = dfilter_apply_edt(cf->rfcode, &edt);
3179 frame_data_set_after_dissect(&fdata, &cum_bytes);
3180 prev_dis_frame = fdata;
3181 prev_dis = &prev_dis_frame;
3183 /* Process this packet. */
3184 if (print_packet_info) {
3185 /* We're printing packet information; print the information for
3188 print_packet(cf, &edt);
3190 print_packet(cf, NULL);
3192 /* The ANSI C standard does not appear to *require* that a line-buffered
3193 stream be flushed to the host environment whenever a newline is
3194 written, it just says that, on such a stream, characters "are
3195 intended to be transmitted to or from the host environment as a
3196 block when a new-line character is encountered".
3198 The Visual C++ 6.0 C implementation doesn't do what is intended;
3199 even if you set a stream to be line-buffered, it still doesn't
3200 flush the buffer at the end of every line.
3202 So, if the "-l" flag was specified, we flush the standard output
3203 at the end of a packet. This will do the right thing if we're
3204 printing packet summary lines, and, as we print the entire protocol
3205 tree for a single packet without waiting for anything to happen,
3206 it should be as good as line-buffered mode if we're printing
3207 protocol trees. (The whole reason for the "-l" flag in either
3208 tcpdump or TShark is to allow the output of a live capture to
3209 be piped to a program or script and to have that script see the
3210 information for the packet as soon as it's printed, rather than
3211 having to wait until a standard I/O buffer fills up. */
3215 if (ferror(stdout)) {
3216 show_print_file_io_error(errno);
3222 prev_cap_frame = fdata;
3223 prev_cap = &prev_cap_frame;
3225 if (do_dissection) {
3226 epan_dissect_cleanup(&edt);
3227 frame_data_cleanup(&fdata);
3233 write_preamble(capture_file *cf)
3235 switch (output_action) {
3238 return print_preamble(print_stream, cf ? cf->filename : NULL);
3242 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3244 write_psml_preamble(stdout);
3245 return !ferror(stdout);
3248 write_fields_preamble(output_fields, stdout);
3249 return !ferror(stdout);
3252 g_assert_not_reached();
3258 get_line_buf(size_t len)
3260 static char *line_bufp = NULL;
3261 static size_t line_buf_len = 256;
3262 size_t new_line_buf_len;
3264 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3265 new_line_buf_len *= 2)
3267 if (line_bufp == NULL) {
3268 line_buf_len = new_line_buf_len;
3269 line_bufp = g_malloc(line_buf_len + 1);
3271 if (new_line_buf_len > line_buf_len) {
3272 line_buf_len = new_line_buf_len;
3273 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
3280 print_columns(capture_file *cf)
3287 line_bufp = get_line_buf(256);
3290 for (i = 0; i < cf->cinfo.num_cols; i++) {
3291 /* Skip columns not marked as visible. */
3292 if (!get_column_visible(i))
3294 switch (cf->cinfo.col_fmt[i]) {
3298 * Don't print this if we're doing a live capture from a network
3299 * interface - if we're doing a live capture, you won't be
3300 * able to look at the capture in the future (it's not being
3301 * saved anywhere), so the frame numbers are unlikely to be
3304 * (XXX - it might be nice to be able to save and print at
3305 * the same time, sort of like an "Update list of packets
3306 * in real time" capture in Wireshark.)
3308 if (global_capture_opts.ifaces->len > 0)
3311 column_len = strlen(cf->cinfo.col_data[i]);
3314 line_bufp = get_line_buf(buf_offset + column_len);
3315 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3321 case COL_ABS_DATE_TIME:
3323 case COL_UTC_DATE_TIME: /* XXX - wider */
3324 column_len = strlen(cf->cinfo.col_data[i]);
3325 if (column_len < 10)
3327 line_bufp = get_line_buf(buf_offset + column_len);
3328 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3334 case COL_DEF_DL_SRC:
3335 case COL_RES_DL_SRC:
3336 case COL_UNRES_DL_SRC:
3337 case COL_DEF_NET_SRC:
3338 case COL_RES_NET_SRC:
3339 case COL_UNRES_NET_SRC:
3340 column_len = strlen(cf->cinfo.col_data[i]);
3341 if (column_len < 12)
3343 line_bufp = get_line_buf(buf_offset + column_len);
3344 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3350 case COL_DEF_DL_DST:
3351 case COL_RES_DL_DST:
3352 case COL_UNRES_DL_DST:
3353 case COL_DEF_NET_DST:
3354 case COL_RES_NET_DST:
3355 case COL_UNRES_NET_DST:
3356 column_len = strlen(cf->cinfo.col_data[i]);
3357 if (column_len < 12)
3359 line_bufp = get_line_buf(buf_offset + column_len);
3360 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3364 column_len = strlen(cf->cinfo.col_data[i]);
3365 line_bufp = get_line_buf(buf_offset + column_len);
3366 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3369 buf_offset += column_len;
3370 if (i != cf->cinfo.num_cols - 1) {
3372 * This isn't the last column, so we need to print a
3373 * separator between this column and the next.
3375 * If we printed a network source and are printing a
3376 * network destination of the same type next, separate
3377 * them with " -> "; if we printed a network destination
3378 * and are printing a network source of the same type
3379 * next, separate them with " <- "; otherwise separate them
3382 * We add enough space to the buffer for " <- " or " -> ",
3383 * even if we're only adding " ".
3385 line_bufp = get_line_buf(buf_offset + 4);
3386 switch (cf->cinfo.col_fmt[i]) {
3391 switch (cf->cinfo.col_fmt[i + 1]) {
3396 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3401 g_strlcat(line_bufp + buf_offset, " ", 5);
3407 case COL_DEF_DL_SRC:
3408 case COL_RES_DL_SRC:
3409 case COL_UNRES_DL_SRC:
3410 switch (cf->cinfo.col_fmt[i + 1]) {
3412 case COL_DEF_DL_DST:
3413 case COL_RES_DL_DST:
3414 case COL_UNRES_DL_DST:
3415 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3420 g_strlcat(line_bufp + buf_offset, " ", 5);
3426 case COL_DEF_NET_SRC:
3427 case COL_RES_NET_SRC:
3428 case COL_UNRES_NET_SRC:
3429 switch (cf->cinfo.col_fmt[i + 1]) {
3431 case COL_DEF_NET_DST:
3432 case COL_RES_NET_DST:
3433 case COL_UNRES_NET_DST:
3434 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3439 g_strlcat(line_bufp + buf_offset, " ", 5);
3448 switch (cf->cinfo.col_fmt[i + 1]) {
3453 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3458 g_strlcat(line_bufp + buf_offset, " ", 5);
3464 case COL_DEF_DL_DST:
3465 case COL_RES_DL_DST:
3466 case COL_UNRES_DL_DST:
3467 switch (cf->cinfo.col_fmt[i + 1]) {
3469 case COL_DEF_DL_SRC:
3470 case COL_RES_DL_SRC:
3471 case COL_UNRES_DL_SRC:
3472 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3477 g_strlcat(line_bufp + buf_offset, " ", 5);
3483 case COL_DEF_NET_DST:
3484 case COL_RES_NET_DST:
3485 case COL_UNRES_NET_DST:
3486 switch (cf->cinfo.col_fmt[i + 1]) {
3488 case COL_DEF_NET_SRC:
3489 case COL_RES_NET_SRC:
3490 case COL_UNRES_NET_SRC:
3491 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3496 g_strlcat(line_bufp + buf_offset, " ", 5);
3503 g_strlcat(line_bufp + buf_offset, " ", 5);
3509 return print_line(print_stream, 0, line_bufp);
3513 print_packet(capture_file *cf, epan_dissect_t *edt)
3515 print_args_t print_args;
3517 if (print_summary || output_fields_has_cols(output_fields)) {
3518 /* Just fill in the columns. */
3519 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3521 if (print_summary) {
3522 /* Now print them. */
3523 switch (output_action) {
3526 if (!print_columns(cf))
3531 proto_tree_write_psml(edt, stdout);
3532 return !ferror(stdout);
3533 case WRITE_FIELDS: /*No non-verbose "fields" format */
3534 g_assert_not_reached();
3539 if (print_details) {
3540 /* Print the information in the protocol tree. */
3541 switch (output_action) {
3544 /* Only initialize the fields that are actually used in proto_tree_print.
3545 * This is particularly important for .range, as that's heap memory which
3546 * we would otherwise have to g_free().
3547 print_args.to_file = TRUE;
3548 print_args.format = print_format;
3549 print_args.print_summary = print_summary;
3550 print_args.print_formfeed = FALSE;
3551 packet_range_init(&print_args.range, &cfile);
3553 print_args.print_hex = print_hex;
3554 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3556 if (!proto_tree_print(&print_args, edt, print_stream))
3559 if (!print_line(print_stream, 0, separator))
3565 proto_tree_write_pdml(edt, stdout);
3567 return !ferror(stdout);
3569 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3571 return !ferror(stdout);
3575 if (print_summary || print_details) {
3576 if (!print_line(print_stream, 0, ""))
3579 if (!print_hex_data(print_stream, edt))
3581 if (!print_line(print_stream, 0, separator))
3590 switch (output_action) {
3593 return print_finale(print_stream);
3597 write_pdml_finale(stdout);
3599 write_psml_finale(stdout);
3600 return !ferror(stdout);
3603 write_fields_finale(output_fields, stdout);
3604 return !ferror(stdout);
3607 g_assert_not_reached();
3613 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3617 char err_msg[2048+1];
3619 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3623 /* The open succeeded. Fill in the information for this file. */
3625 /* Cleanup all data structures used for dissection. */
3626 cleanup_dissection();
3627 /* Initialize all data structures used for dissection. */
3631 cf->f_datalen = 0; /* not used, but set it anyway */
3633 /* Set the file name because we need it to set the follow stream filter.
3634 XXX - is that still true? We need it for other reasons, though,
3636 cf->filename = g_strdup(fname);
3638 /* Indicate whether it's a permanent or temporary file. */
3639 cf->is_tempfile = is_tempfile;
3641 /* No user changes yet. */
3642 cf->unsaved_changes = FALSE;
3644 cf->cd_t = wtap_file_type(cf->wth);
3646 cf->drops_known = FALSE;
3648 cf->snap = wtap_snapshot_length(cf->wth);
3649 if (cf->snap == 0) {
3650 /* Snapshot length not known. */
3651 cf->has_snap = FALSE;
3652 cf->snap = WTAP_MAX_PACKET_SIZE;
3654 cf->has_snap = TRUE;
3655 nstime_set_zero(&cf->elapsed_time);
3656 nstime_set_unset(&first_ts);
3660 cf->state = FILE_READ_IN_PROGRESS;
3662 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3663 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3668 g_snprintf(err_msg, sizeof err_msg,
3669 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3670 cmdarg_err("%s", err_msg);
3675 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3677 char *save_file_string;
3679 save_file_string = output_file_description(fname);
3684 cmdarg_err("Not all the packets could be written to the %s because there is "
3685 "no space left on the file system.",
3691 cmdarg_err("Not all the packets could be written to the %s because you are "
3692 "too close to, or over your disk quota.",
3697 case WTAP_ERR_CANT_CLOSE:
3698 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3702 case WTAP_ERR_SHORT_WRITE:
3703 cmdarg_err("Not all the packets could be written to the %s.",
3709 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3710 wtap_strerror(err));
3712 cmdarg_err("An error occurred while writing to the %s: %s.",
3713 save_file_string, wtap_strerror(err));
3717 g_free(save_file_string);
3721 show_print_file_io_error(int err)
3726 cmdarg_err("Not all the packets could be printed because there is "
3727 "no space left on the file system.");
3732 cmdarg_err("Not all the packets could be printed because you are "
3733 "too close to, or over your disk quota.");
3738 cmdarg_err("An error occurred while printing packets: %s.",
3745 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3749 static char errmsg_errno[1024+1];
3752 /* Wiretap error. */
3755 case WTAP_ERR_NOT_REGULAR_FILE:
3756 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3759 case WTAP_ERR_RANDOM_OPEN_PIPE:
3760 /* Seen only when opening a capture file for reading. */
3761 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3764 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3765 /* Seen only when opening a capture file for reading. */
3766 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3769 case WTAP_ERR_UNSUPPORTED:
3770 /* Seen only when opening a capture file for reading. */
3771 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3772 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3775 errmsg = errmsg_errno;
3778 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3779 /* Seen only when opening a capture file for writing. */
3780 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3781 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3782 "written to a pipe.", wtap_file_type_short_string(file_type));
3783 errmsg = errmsg_errno;
3786 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3787 /* Seen only when opening a capture file for writing. */
3788 errmsg = "TShark doesn't support writing capture files in that format.";
3791 case WTAP_ERR_UNSUPPORTED_ENCAP:
3793 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3794 "TShark can't save this capture as a \"%s\" file.",
3795 wtap_file_type_short_string(file_type));
3797 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3798 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3802 errmsg = errmsg_errno;
3805 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3807 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3808 "TShark can't save this capture as a \"%s\" file.",
3809 wtap_file_type_short_string(file_type));
3810 errmsg = errmsg_errno;
3812 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3815 case WTAP_ERR_BAD_FILE:
3816 /* Seen only when opening a capture file for reading. */
3817 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3818 "The file \"%%s\" appears to be damaged or corrupt.\n"
3821 errmsg = errmsg_errno;
3824 case WTAP_ERR_CANT_OPEN:
3826 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3828 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3831 case WTAP_ERR_SHORT_READ:
3832 errmsg = "The file \"%s\" appears to have been cut short"
3833 " in the middle of a packet or other data.";
3836 case WTAP_ERR_SHORT_WRITE:
3837 errmsg = "A full header couldn't be written to the file \"%s\".";
3840 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3841 errmsg = "This file type cannot be written as a compressed file.";
3844 case WTAP_ERR_DECOMPRESS:
3845 /* Seen only when opening a capture file for reading. */
3846 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3847 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3850 errmsg = errmsg_errno;
3854 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3855 "The file \"%%s\" could not be %s: %s.",
3856 for_writing ? "created" : "opened",
3857 wtap_strerror(err));
3858 errmsg = errmsg_errno;
3862 errmsg = file_open_error_message(err, for_writing);
3867 * Open/create errors are reported with an console message in TShark.
3870 open_failure_message(const char *filename, int err, gboolean for_writing)
3872 fprintf(stderr, "tshark: ");
3873 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3874 fprintf(stderr, "\n");
3879 * General errors are reported with an console message in TShark.
3882 failure_message(const char *msg_format, va_list ap)
3884 fprintf(stderr, "tshark: ");
3885 vfprintf(stderr, msg_format, ap);
3886 fprintf(stderr, "\n");
3890 * Read errors are reported with an console message in TShark.
3893 read_failure_message(const char *filename, int err)
3895 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3896 filename, g_strerror(err));
3900 * Write errors are reported with an console message in TShark.
3903 write_failure_message(const char *filename, int err)
3905 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3906 filename, g_strerror(err));
3910 * Print to the standard error. This is a command-line tool, so there's
3911 * no need to pop up a console.
3914 vfprintf_stderr(const char *fmt, va_list ap)
3916 vfprintf(stderr, fmt, ap);
3920 fprintf_stderr(const char *fmt, ...)
3925 vfprintf_stderr(fmt, ap);
3930 * Report an error in command-line arguments.
3933 cmdarg_err(const char *fmt, ...)
3938 failure_message(fmt, ap);
3943 * Report additional information for an error in command-line arguments.
3946 cmdarg_err_cont(const char *fmt, ...)
3951 vfprintf(stderr, fmt, ap);
3952 fprintf(stderr, "\n");
3958 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3963 * indent-tabs-mode: nil
3966 * vi: set shiftwidth=2 tabstop=8 expandtab:
3967 * :indentSize=2:tabSize=8:noTabs=true: