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/crash_info.h>
60 #include <wsutil/privileges.h>
61 #include <wsutil/file_util.h>
64 #include <epan/timestamp.h>
65 #include <epan/packet.h>
67 #include "disabled_protos.h"
68 #include <epan/prefs.h>
69 #include <epan/column.h>
71 #include <epan/addr_resolv.h>
73 #include "clopts_common.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, const guchar *pd,
170 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_new(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: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
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 Read filter in Wireshark display filter syntax\n");
288 fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter syntax\n");
289 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
290 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
291 fprintf(output, " -d %s ...\n", decode_as_arg_template);
292 fprintf(output, " \"Decode As\", see the man page for details\n");
293 fprintf(output, " Example: tcp.port==8888,http\n");
294 fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
295 fprintf(output, " then be written to a capture file. (Implies -W n)\n");
297 /*fprintf(output, "\n");*/
298 fprintf(output, "Output:\n");
299 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
300 fprintf(output, " (or to the standard output for \"-\")\n");
301 fprintf(output, " -C <config profile> start with specified configuration profile\n");
302 fprintf(output, " -F <output file type> set the output file type, default is pcapng\n");
303 fprintf(output, " an empty \"-F\" option will list the file types\n");
304 fprintf(output, " -V add output of packet tree (Packet Details)\n");
305 fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n");
306 fprintf(output, " separated\n");
307 fprintf(output, " -P print packet summary even when writing to a file\n");
308 fprintf(output, " -S <separator> the line separator to print between packets\n");
309 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
310 fprintf(output, " -T pdml|ps|psml|text|fields\n");
311 fprintf(output, " format of text output (def: text)\n");
312 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port, col.Info);\n");
313 fprintf(output, " this option can be repeated to print multiple fields\n");
314 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
315 fprintf(output, " header=y|n switch headers on and off\n");
316 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
317 fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n");
318 fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
319 fprintf(output, " aggregator\n");
320 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
321 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
322 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
323 fprintf(output, " -l flush standard output after each packet\n");
324 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
325 fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n");
326 fprintf(output, " -g enable group read access on the output file(s)\n");
327 fprintf(output, " -W n Save extra information in the file, if supported.\n");
328 fprintf(output, " n = write network address resolution information\n");
329 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
330 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
332 fprintf(output, "\n");
333 fprintf(output, "Miscellaneous:\n");
334 fprintf(output, " -h display this help and exit\n");
335 fprintf(output, " -v display version info and exit\n");
336 fprintf(output, " -o <name>:<value> ... override preference setting\n");
337 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
338 fprintf(output, " -G [report] dump one of several available reports and exit\n");
339 fprintf(output, " default report=\"fields\"\n");
340 fprintf(output, " use \"-G ?\" for more help\n");
344 glossary_option_help(void)
350 fprintf(output, "TShark " VERSION "%s\n", wireshark_svnversion);
352 fprintf(output, "\n");
353 fprintf(output, "Usage: tshark -G [report]\n");
354 fprintf(output, "\n");
355 fprintf(output, "Glossary table reports:\n");
356 fprintf(output, " -G fields dump fields glossary and exit\n");
357 fprintf(output, " -G protocols dump protocols in registration database and exit\n");
358 fprintf(output, " -G values dump value, range, true/false strings and exit\n");
359 fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
360 fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
361 fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
362 fprintf(output, "\n");
363 fprintf(output, "Preference reports:\n");
364 fprintf(output, " -G defaultprefs dump default preferences and exit\n");
365 fprintf(output, " -G currentprefs dump current preferences and exit\n");
366 fprintf(output, "\n");
370 * For a dissector table, print on the stream described by output,
371 * its short name (which is what's used in the "-d" option) and its
375 display_dissector_table_names(const char *table_name, const char *ui_name,
378 if ((prev_display_dissector_name == NULL) ||
379 (strcmp(prev_display_dissector_name, table_name) != 0)) {
380 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
381 prev_display_dissector_name = table_name;
386 * For a dissector handle, print on the stream described by output,
387 * the filter name (which is what's used in the "-d" option) and the full
388 * name for the protocol that corresponds to this handle.
391 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
394 const gchar *proto_filter_name;
395 const gchar *proto_ui_name;
397 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
399 if (proto_id != -1) {
400 proto_filter_name = proto_get_protocol_filter_name(proto_id);
401 proto_ui_name = proto_get_protocol_name(proto_id);
402 g_assert(proto_filter_name != NULL);
403 g_assert(proto_ui_name != NULL);
405 if ((prev_display_dissector_name == NULL) ||
406 (strcmp(prev_display_dissector_name, proto_filter_name) != 0)) {
407 fprintf((FILE *)output, "\t%s (%s)\n",
410 prev_display_dissector_name = proto_filter_name;
416 * The protocol_name_search structure is used by find_protocol_name_func()
417 * to pass parameters and store results
419 struct protocol_name_search{
420 gchar *searched_name; /* Protocol filter name we are looking for */
421 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
422 guint nb_match; /* How many dissectors matched searched_name */
424 typedef struct protocol_name_search *protocol_name_search_t;
427 * This function parses all dissectors associated with a table to find the
428 * one whose protocol has the specified filter name. It is called
429 * as a reference function in a call to dissector_table_foreach_handle.
430 * The name we are looking for, as well as the results, are stored in the
431 * protocol_name_search struct pointed to by user_data.
432 * If called using dissector_table_foreach_handle, we actually parse the
433 * whole list of dissectors.
436 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
440 const gchar *protocol_filter_name;
441 protocol_name_search_t search_info;
445 search_info = (protocol_name_search_t)user_data;
447 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
448 if (proto_id != -1) {
449 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
450 g_assert(protocol_filter_name != NULL);
451 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
453 if (search_info->nb_match == 0) {
454 /* Record this handle only if this is the first match */
455 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
457 search_info->nb_match++;
463 * Allow dissector key names to be sorted alphabetically
467 compare_dissector_key_name(gconstpointer dissector_a, gconstpointer dissector_b)
469 return strcmp((const char*)dissector_a, (const char*)dissector_b);
473 * Print all layer type names supported.
474 * We send the output to the stream described by the handle output.
478 fprint_all_layer_types(FILE *output)
481 prev_display_dissector_name = NULL;
482 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output, (GCompareFunc)compare_dissector_key_name);
486 * Print all protocol names supported for a specific layer type.
487 * table_name contains the layer type name in which the search is performed.
488 * We send the output to the stream described by the handle output.
492 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
495 prev_display_dissector_name = NULL;
496 dissector_table_foreach_handle(table_name,
497 display_dissector_names,
502 * The function below parses the command-line parameters for the decode as
503 * feature (a string pointer by cl_param).
504 * It checks the format of the command-line, searches for a matching table
505 * and dissector. If a table/dissector match is not found, we display a
506 * summary of the available tables/dissectors (on stderr) and return FALSE.
507 * If everything is fine, we get the "Decode as" preference activated,
508 * then we return TRUE.
511 add_decode_as(const gchar *cl_param)
514 guint32 selector, selector2;
515 gchar *decoded_param;
516 gchar *remaining_param;
518 gchar *dissector_str;
519 dissector_handle_t dissector_matching;
520 dissector_table_t table_matching;
521 ftenum_t dissector_table_selector_type;
522 struct protocol_name_search user_protocol_name;
526 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
529 decoded_param = g_strdup(cl_param);
530 g_assert(decoded_param);
533 /* The lines below will parse this string (modifying it) to extract all
534 necessary information. Note that decoded_param is still needed since
535 strings are not copied - we just save pointers. */
537 /* This section extracts a layer type (table_name) from decoded_param */
538 table_name = decoded_param; /* Layer type string starts from beginning */
540 remaining_param = strchr(table_name, '=');
541 if (remaining_param == NULL) {
542 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
543 /* If the argument does not follow the template, carry on anyway to check
544 if the table name is at least correct. If remaining_param is NULL,
545 we'll exit anyway further down */
548 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
551 /* Remove leading and trailing spaces from the table name */
552 while ( table_name[0] == ' ' )
554 while ( table_name[strlen(table_name) - 1] == ' ' )
555 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
557 /* The following part searches a table matching with the layer type specified */
558 table_matching = NULL;
560 /* Look for the requested table */
561 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
562 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
565 table_matching = find_dissector_table(table_name);
566 if (!table_matching) {
567 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
571 if (!table_matching) {
572 /* Display a list of supported layer types to help the user, if the
573 specified layer type was not found */
574 cmdarg_err("Valid layer types are:");
575 fprint_all_layer_types(stderr);
577 if (remaining_param == NULL || !table_matching) {
578 /* Exit if the layer type was not found, or if no '=' separator was found
580 g_free(decoded_param);
584 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
585 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
588 remaining_param++; /* Move to the second '=' */
589 *remaining_param = '\0'; /* Remove the second '=' */
591 remaining_param++; /* Position after the layer type string */
593 /* This section extracts a selector value (selector_str) from decoded_param */
595 selector_str = remaining_param; /* Next part starts with the selector number */
597 remaining_param = strchr(selector_str, ',');
598 if (remaining_param == NULL) {
599 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
600 /* If the argument does not follow the template, carry on anyway to check
601 if the selector value is at least correct. If remaining_param is NULL,
602 we'll exit anyway further down */
605 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
608 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
610 switch (dissector_table_selector_type) {
616 /* The selector for this table is an unsigned number. Parse it as such.
617 There's no need to remove leading and trailing spaces from the
618 selector number string, because sscanf will do that for us. */
619 switch (sscanf(selector_str, "%u%c%u", &selector, &op, &selector2)) {
624 if (op != ':' && op != '-') {
625 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
626 g_free(decoded_param);
630 if ((selector2 == 0) || ((guint64)selector + selector2 - 1) > G_MAXUINT32) {
631 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
632 g_free(decoded_param);
636 else if (selector2 < selector) {
637 /* We could swap them for the user, but maybe it's better to call
638 * this out as an error in case it's not what was intended? */
639 cmdarg_err("Invalid selector numeric range \"%s\"", selector_str);
640 g_free(decoded_param);
645 cmdarg_err("Invalid selector number \"%s\"", selector_str);
646 g_free(decoded_param);
653 /* The selector for this table is a string. */
657 /* There are currently no dissector tables with any types other
658 than the ones listed above. */
659 g_assert_not_reached();
662 if (remaining_param == NULL) {
663 /* Exit if no ',' separator was found (see above) */
664 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
665 fprint_all_protocols_for_layer_types(stderr, table_name);
666 g_free(decoded_param);
670 remaining_param++; /* Position after the selector number string */
672 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
674 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
676 /* Remove leading and trailing spaces from the dissector name */
677 while ( dissector_str[0] == ' ' )
679 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
680 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
682 dissector_matching = NULL;
684 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
685 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 */
686 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
689 user_protocol_name.nb_match = 0;
690 user_protocol_name.searched_name = dissector_str;
691 user_protocol_name.matched_handle = NULL;
693 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 */
695 if (user_protocol_name.nb_match != 0) {
696 dissector_matching = user_protocol_name.matched_handle;
697 if (user_protocol_name.nb_match > 1) {
698 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
702 /* OK, check whether the problem is that there isn't any such
703 protocol, or that there is but it's not specified as a protocol
704 that's valid for that dissector table.
705 Note, we don't exit here, but dissector_matching will remain NULL,
707 if (proto_get_id_by_filter_name(dissector_str) == -1) {
708 /* No such protocol */
709 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
711 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
712 dissector_str, table_name);
717 if (!dissector_matching) {
718 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
719 fprint_all_protocols_for_layer_types(stderr, table_name);
720 g_free(decoded_param);
724 /* This is the end of the code that parses the command-line options.
725 All information is now stored in the variables:
729 The above variables that are strings are still pointing to areas within
730 decoded_parm. decoded_parm thus still needs to be kept allocated in
731 until we stop needing these variables
732 decoded_param will be deallocated at each exit point of this function */
735 /* We now have a pointer to the handle for the requested dissector
736 (requested protocol) inside the variable dissector_matching */
737 switch (dissector_table_selector_type) {
743 /* The selector for this table is an unsigned number. */
745 dissector_change_uint(table_name, selector, dissector_matching);
746 } else if (op == ':') {
747 for (i = selector; i < (guint64)selector + selector2; i++) {
748 dissector_change_uint(table_name, (guint32)i, dissector_matching);
750 } else { /* op == '-' */
751 for (i = selector; i <= selector2; i++) {
752 dissector_change_uint(table_name, (guint32)i, dissector_matching);
759 /* The selector for this table is a string. */
760 dissector_change_string(table_name, selector_str, dissector_matching);
764 /* There are currently no dissector tables with any types other
765 than the ones listed above. */
766 g_assert_not_reached();
768 g_free(decoded_param); /* "Decode As" rule has been successfully added */
773 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
774 const gchar *message, gpointer user_data)
776 /* ignore log message, if log_level isn't interesting based
777 upon the console log preferences.
778 If the preferences haven't been loaded loaded yet, display the
781 The default console_log_level preference value is such that only
782 ERROR, CRITICAL and WARNING level messages are processed;
783 MESSAGE, INFO and DEBUG level messages are ignored.
785 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
786 ERROR and CRITICAL level messages so the current code is a behavioral
787 change. The current behavior is the same as in Wireshark.
789 if ((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
790 prefs.console_log_level != 0) {
794 g_log_default_handler(log_domain, log_level, message, user_data);
799 output_file_description(const char *fname)
801 char *save_file_string;
803 /* Get a string that describes what we're writing to */
804 if (strcmp(fname, "-") == 0) {
805 /* We're writing to the standard output */
806 save_file_string = g_strdup("standard output");
808 /* We're writing to a file with the name in save_file */
809 save_file_string = g_strdup_printf("file \"%s\"", fname);
811 return save_file_string;
815 print_current_user(void) {
816 gchar *cur_user, *cur_group;
818 if (started_with_special_privs()) {
819 cur_user = get_cur_username();
820 cur_group = get_cur_groupname();
821 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
822 cur_user, cur_group);
825 if (running_with_special_privs()) {
826 fprintf(stderr, " This could be dangerous.");
828 fprintf(stderr, "\n");
833 check_capture_privs(void) {
836 /* Warn the user if npf.sys isn't loaded. */
837 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
838 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
839 "capturing or\nlisting interfaces.\n");
845 show_version(GString *comp_info_str, GString *runtime_info_str)
847 printf("TShark " VERSION "%s\n"
854 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
855 runtime_info_str->str);
859 main(int argc, char *argv[])
861 GString *comp_info_str;
862 GString *runtime_info_str;
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 gchar *dfilter = NULL;
898 #ifdef HAVE_PCAP_OPEN_DEAD
899 struct bpf_program fcode;
901 dfilter_t *rfcode = NULL;
902 dfilter_t *dfcode = NULL;
907 gchar *output_only = NULL;
909 #ifdef HAVE_PCAP_REMOTE
910 #define OPTSTRING_A "A:"
912 #define OPTSTRING_A ""
915 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
916 #define OPTSTRING_B "B:"
918 #define OPTSTRING_B ""
919 #endif /* _WIN32 or HAVE_PCAP_CREATE */
920 #else /* HAVE_LIBPCAP */
921 #define OPTSTRING_B ""
922 #endif /* HAVE_LIBPCAP */
924 #ifdef HAVE_PCAP_CREATE
925 #define OPTSTRING_I "I"
927 #define OPTSTRING_I ""
930 #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:Y:z:"
932 static const char optstring[] = OPTSTRING;
934 /* Assemble the compile-time version information string */
935 comp_info_str = g_string_new("Compiled ");
936 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
938 /* Assemble the run-time version information string */
939 runtime_info_str = g_string_new("Running ");
940 get_runtime_version_info(runtime_info_str, NULL);
942 /* Add it to the information to be reported on a crash. */
943 ws_add_crash_info("TShark " VERSION "%s\n"
948 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
951 arg_list_utf_16to8(argc, argv);
952 create_app_running_mutex();
953 #if !GLIB_CHECK_VERSION(2,31,0)
959 * Get credential information for later use.
961 init_process_policies();
964 * Attempt to get the pathname of the executable file.
966 init_progfile_dir_error = init_progfile_dir(argv[0], main);
967 if (init_progfile_dir_error != NULL) {
968 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
969 init_progfile_dir_error);
973 * In order to have the -X opts assigned before the wslua machine starts
974 * we need to call getopts before epan_init() gets called.
977 optind_initial = optind;
979 while ((opt = getopt(argc, argv, optstring)) != -1) {
981 case 'C': /* Configuration Profile */
982 if (profile_exists (optarg, FALSE)) {
983 set_profile_name (optarg);
985 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
989 case 'P': /* Print packet summary info even when writing to a file */
990 print_packet_info = TRUE;
991 print_summary = TRUE;
993 case 'O': /* Only output these protocols */
994 output_only = g_strdup(optarg);
996 case 'V': /* Verbose */
997 print_details = TRUE;
998 print_packet_info = TRUE;
1000 case 'x': /* Print packet data in hex (and ASCII) */
1002 /* The user asked for hex output, so let's ensure they get it,
1003 * even if they're writing to a file.
1005 print_packet_info = TRUE;
1016 * Print packet summary information is the default, unless either -V or -x
1017 * were specified and -P was not. Note that this is new behavior, which
1018 * allows for the possibility of printing only hex/ascii output without
1019 * necessarily requiring that either the summary or details be printed too.
1021 if (print_summary == -1)
1022 print_summary = (print_details || print_hex) ? FALSE : TRUE;
1024 optind = optind_initial;
1029 /** Send All g_log messages to our own handler **/
1033 G_LOG_LEVEL_CRITICAL|
1034 G_LOG_LEVEL_WARNING|
1035 G_LOG_LEVEL_MESSAGE|
1038 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
1040 g_log_set_handler(NULL,
1041 (GLogLevelFlags)log_flags,
1042 tshark_log_handler, NULL /* user_data */);
1043 g_log_set_handler(LOG_DOMAIN_MAIN,
1044 (GLogLevelFlags)log_flags,
1045 tshark_log_handler, NULL /* user_data */);
1048 g_log_set_handler(LOG_DOMAIN_CAPTURE,
1049 (GLogLevelFlags)log_flags,
1050 tshark_log_handler, NULL /* user_data */);
1051 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
1052 (GLogLevelFlags)log_flags,
1053 tshark_log_handler, NULL /* user_data */);
1056 initialize_funnel_ops();
1059 capture_opts_init(&global_capture_opts, &cfile);
1062 timestamp_set_type(TS_RELATIVE);
1063 timestamp_set_precision(TS_PREC_AUTO);
1064 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1066 /* Register all dissectors; we must do this before checking for the
1067 "-G" flag, as the "-G" flag dumps information registered by the
1068 dissectors, and we must do it before we read the preferences, in
1069 case any dissectors register preferences. */
1070 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
1071 failure_message, open_failure_message, read_failure_message,
1072 write_failure_message);
1074 /* Register all tap listeners; we do this before we parse the arguments,
1075 as the "-z" argument can specify a registered tap. */
1077 /* we register the plugin taps before the other taps because
1078 stats_tree taps plugins will be registered as tap listeners
1079 by stats_tree_stat.c and need to registered before that */
1081 register_all_plugin_tap_listeners();
1083 register_all_tap_listeners();
1085 /* If invoked with the "-G" flag, we dump out information based on
1086 the argument to the "-G" flag; if no argument is specified,
1087 for backwards compatibility we dump out a glossary of display
1090 XXX - we do this here, for now, to support "-G" with no arguments.
1091 If none of our build or other processes uses "-G" with no arguments,
1092 we can just process it with the other arguments. */
1093 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
1094 proto_initialize_all_prefixes();
1097 proto_registrar_dump_fields();
1099 if (strcmp(argv[2], "fields") == 0)
1100 proto_registrar_dump_fields();
1101 else if (strcmp(argv[2], "protocols") == 0)
1102 proto_registrar_dump_protocols();
1103 else if (strcmp(argv[2], "values") == 0)
1104 proto_registrar_dump_values();
1105 else if (strcmp(argv[2], "ftypes") == 0)
1106 proto_registrar_dump_ftypes();
1107 else if (strcmp(argv[2], "decodes") == 0)
1108 dissector_dump_decodes();
1109 else if (strcmp(argv[2], "heuristic-decodes") == 0)
1110 dissector_dump_heur_decodes();
1111 else if (strcmp(argv[2], "defaultprefs") == 0)
1113 else if (strcmp(argv[2], "plugins") == 0)
1115 else if (strcmp(argv[2], "?") == 0)
1116 glossary_option_help();
1117 else if (strcmp(argv[2], "-?") == 0)
1118 glossary_option_help();
1119 else if (strcmp(argv[2], "currentprefs") == 0) {
1120 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1121 &pf_open_errno, &pf_read_errno, &pf_path);
1124 cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]);
1131 /* Set the C-language locale to the native environment. */
1132 setlocale(LC_ALL, "");
1134 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
1135 &pf_open_errno, &pf_read_errno, &pf_path);
1136 if (gpf_path != NULL) {
1137 if (gpf_open_errno != 0) {
1138 cmdarg_err("Can't open global preferences file \"%s\": %s.",
1139 pf_path, g_strerror(gpf_open_errno));
1141 if (gpf_read_errno != 0) {
1142 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
1143 pf_path, g_strerror(gpf_read_errno));
1146 if (pf_path != NULL) {
1147 if (pf_open_errno != 0) {
1148 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
1149 g_strerror(pf_open_errno));
1151 if (pf_read_errno != 0) {
1152 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
1153 pf_path, g_strerror(pf_read_errno));
1159 /* Read the disabled protocols file. */
1160 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
1161 &dp_path, &dp_open_errno, &dp_read_errno);
1162 if (gdp_path != NULL) {
1163 if (gdp_open_errno != 0) {
1164 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
1165 gdp_path, g_strerror(gdp_open_errno));
1167 if (gdp_read_errno != 0) {
1168 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
1169 gdp_path, g_strerror(gdp_read_errno));
1173 if (dp_path != NULL) {
1174 if (dp_open_errno != 0) {
1176 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
1177 g_strerror(dp_open_errno));
1179 if (dp_read_errno != 0) {
1181 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
1182 g_strerror(dp_read_errno));
1187 check_capture_privs();
1189 cap_file_init(&cfile);
1191 /* Print format defaults to this. */
1192 print_format = PR_FMT_TEXT;
1194 output_fields = output_fields_new();
1196 /* Now get our args */
1197 while ((opt = getopt(argc, argv, optstring)) != -1) {
1199 case '2': /* Perform two pass analysis */
1200 perform_two_pass_analysis = TRUE;
1202 case 'a': /* autostop criteria */
1203 case 'b': /* Ringbuffer option */
1204 case 'c': /* Capture x packets */
1205 case 'f': /* capture filter */
1206 case 'g': /* enable group read access on file(s) */
1207 case 'i': /* Use interface x */
1208 case 'p': /* Don't capture in promiscuous mode */
1209 #ifdef HAVE_PCAP_REMOTE
1210 case 'A': /* Authentication */
1212 #ifdef HAVE_PCAP_CREATE
1213 case 'I': /* Capture in monitor mode, if available */
1215 case 's': /* Set the snapshot (capture) length */
1216 case 'w': /* Write to capture file x */
1217 case 'y': /* Set the pcap data link type */
1218 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1219 case 'B': /* Buffer size */
1220 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1222 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1227 capture_option_specified = TRUE;
1232 /* Configuration profile settings were already processed just ignore them this time*/
1234 case 'd': /* Decode as rule */
1235 if (!add_decode_as(optarg))
1238 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1239 case 'K': /* Kerberos keytab file */
1240 read_keytab_file(optarg);
1243 case 'D': /* Print a list of capture devices and exit */
1245 if_list = capture_interface_list(&err, &err_str);
1246 if (if_list == NULL) {
1248 case CANT_GET_INTERFACE_LIST:
1249 case DONT_HAVE_PCAP:
1250 cmdarg_err("%s", err_str);
1254 case NO_INTERFACES_FOUND:
1255 cmdarg_err("There are no interfaces on which a capture can be done");
1260 capture_opts_print_interfaces(if_list);
1261 free_interface_list(if_list);
1264 capture_option_specified = TRUE;
1270 output_fields_add(output_fields, optarg);
1274 if (!output_fields_set_option(output_fields, optarg)) {
1275 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1276 output_fields_list_options(stderr);
1281 out_file_type = wtap_short_string_to_file_type(optarg);
1282 if (out_file_type < 0) {
1283 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1284 list_capture_types();
1288 case 'W': /* Select extra information to save in our capture file */
1289 /* This is patterned after the -N flag which may not be the best idea. */
1290 if (strchr(optarg, 'n')) {
1291 out_file_name_res = TRUE;
1293 cmdarg_err("Invalid -W argument \"%s\"", optarg);
1297 case 'H': /* Read address to name mappings from a hosts file */
1298 if (! add_hosts_file(optarg))
1300 cmdarg_err("Can't read host entries from \"%s\"", optarg);
1303 out_file_name_res = TRUE;
1306 case 'h': /* Print help and exit */
1310 case 'l': /* "Line-buffer" standard output */
1311 /* This isn't line-buffering, strictly speaking, it's just
1312 flushing the standard output after the information for
1313 each packet is printed; however, that should be good
1314 enough for all the purposes to which "-l" is put (and
1315 is probably actually better for "-V", as it does fewer
1318 See the comment in "process_packet()" for an explanation of
1319 why we do that, and why we don't just use "setvbuf()" to
1320 make the standard output line-buffered (short version: in
1321 Windows, "line-buffered" is the same as "fully-buffered",
1322 and the output buffer is only flushed when it fills up). */
1323 line_buffered = TRUE;
1325 case 'L': /* Print list of link-layer types and exit */
1327 list_link_layer_types = TRUE;
1329 capture_option_specified = TRUE;
1333 case 'n': /* No name resolution */
1334 gbl_resolv_flags.mac_name = FALSE;
1335 gbl_resolv_flags.network_name = FALSE;
1336 gbl_resolv_flags.transport_name = FALSE;
1337 gbl_resolv_flags.concurrent_dns = FALSE;
1339 case 'N': /* Select what types of addresses/port #s to resolve */
1340 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
1341 if (badopt != '\0') {
1342 cmdarg_err("-N specifies unknown resolving option '%c';",
1344 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1348 case 'o': /* Override preference from command line */
1349 switch (prefs_set_pref(optarg)) {
1354 case PREFS_SET_SYNTAX_ERR:
1355 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1359 case PREFS_SET_NO_SUCH_PREF:
1360 case PREFS_SET_OBSOLETE:
1361 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1366 case 'q': /* Quiet */
1369 case 'Q': /* Really quiet */
1371 really_quiet = TRUE;
1373 case 'r': /* Read capture file x */
1374 cf_name = g_strdup(optarg);
1376 case 'R': /* Read file filter */
1380 /* already processed; just ignore it now */
1382 case 'S': /* Set the line Separator to be printed between packets */
1383 separator = strdup(optarg);
1385 case 't': /* Time stamp type */
1386 if (strcmp(optarg, "r") == 0)
1387 timestamp_set_type(TS_RELATIVE);
1388 else if (strcmp(optarg, "a") == 0)
1389 timestamp_set_type(TS_ABSOLUTE);
1390 else if (strcmp(optarg, "ad") == 0)
1391 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1392 else if (strcmp(optarg, "d") == 0)
1393 timestamp_set_type(TS_DELTA);
1394 else if (strcmp(optarg, "dd") == 0)
1395 timestamp_set_type(TS_DELTA_DIS);
1396 else if (strcmp(optarg, "e") == 0)
1397 timestamp_set_type(TS_EPOCH);
1398 else if (strcmp(optarg, "u") == 0)
1399 timestamp_set_type(TS_UTC);
1400 else if (strcmp(optarg, "ud") == 0)
1401 timestamp_set_type(TS_UTC_WITH_DATE);
1403 cmdarg_err("Invalid time stamp type \"%s\"",
1405 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1406 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1410 case 'T': /* printing Type */
1411 if (strcmp(optarg, "text") == 0) {
1412 output_action = WRITE_TEXT;
1413 print_format = PR_FMT_TEXT;
1414 } else if (strcmp(optarg, "ps") == 0) {
1415 output_action = WRITE_TEXT;
1416 print_format = PR_FMT_PS;
1417 } else if (strcmp(optarg, "pdml") == 0) {
1418 output_action = WRITE_XML;
1419 print_details = TRUE; /* Need details */
1420 print_summary = FALSE; /* Don't allow summary */
1421 } else if (strcmp(optarg, "psml") == 0) {
1422 output_action = WRITE_XML;
1423 print_details = FALSE; /* Don't allow details */
1424 print_summary = TRUE; /* Need summary */
1425 } else if (strcmp(optarg, "fields") == 0) {
1426 output_action = WRITE_FIELDS;
1427 print_details = TRUE; /* Need full tree info */
1428 print_summary = FALSE; /* Don't allow summary */
1430 cmdarg_err("Invalid -T parameter.");
1431 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1435 case 'u': /* Seconds type */
1436 if (strcmp(optarg, "s") == 0)
1437 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1438 else if (strcmp(optarg, "hms") == 0)
1439 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1441 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1442 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1446 case 'v': /* Show version and exit */
1448 show_version(comp_info_str, runtime_info_str);
1449 g_string_free(comp_info_str, TRUE);
1450 g_string_free(runtime_info_str, TRUE);
1451 /* We don't really have to cleanup here, but it's a convenient way to test
1452 * start-up and shut-down of the epan library without any UI-specific
1453 * cruft getting in the way. Makes the results of running
1454 * $ ./tools/valgrind-wireshark -n
1455 * much more useful. */
1459 case 'O': /* Only output these protocols */
1460 /* already processed; just ignore it now */
1462 case 'V': /* Verbose */
1463 /* already processed; just ignore it now */
1465 case 'x': /* Print packet data in hex (and ASCII) */
1466 /* already processed; just ignore it now */
1474 /* We won't call the init function for the stat this soon
1475 as it would disallow MATE's fields (which are registered
1476 by the preferences set callback) from being used as
1477 part of a tap filter. Instead, we just add the argument
1478 to a list of stat arguments. */
1479 if (!process_stat_cmd_arg(optarg)) {
1480 if (strcmp("help", optarg)==0) {
1481 fprintf(stderr, "tshark: The available statistics for the \"-z\" option are:\n");
1482 list_stat_cmd_args();
1485 cmdarg_err("Invalid -z argument \"%s\".", optarg);
1486 cmdarg_err_cont(" -z argument must be one of :");
1487 list_stat_cmd_args();
1492 case '?': /* Bad flag - print usage message */
1495 list_capture_types();
1505 /* If we specified output fields, but not the output field type... */
1506 if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1507 cmdarg_err("Output fields were specified with \"-e\", "
1508 "but \"-Tfields\" was not specified.");
1510 } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1511 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1512 "specified with \"-e\".");
1517 /* If no capture filter or display filter has been specified, and there are
1518 still command-line arguments, treat them as the tokens of a capture
1519 filter (if no "-r" flag was specified) or a display filter (if a "-r"
1520 flag was specified. */
1521 if (optind < argc) {
1522 if (cf_name != NULL) {
1523 if (dfilter != NULL) {
1524 cmdarg_err("Display filters were specified both with \"-d\" "
1525 "and with additional command-line arguments.");
1528 dfilter = get_args_as_string(argc, argv, optind);
1533 if (global_capture_opts.default_options.cfilter) {
1534 cmdarg_err("A default capture filter was specified both with \"-f\""
1535 " and with additional command-line arguments.");
1538 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1539 interface_options interface_opts;
1540 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1541 if (interface_opts.cfilter == NULL) {
1542 interface_opts.cfilter = get_args_as_string(argc, argv, optind);
1543 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
1544 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
1546 cmdarg_err("A capture filter was specified both with \"-f\""
1547 " and with additional command-line arguments.");
1551 global_capture_opts.default_options.cfilter = get_args_as_string(argc, argv, optind);
1553 capture_option_specified = TRUE;
1559 if (!global_capture_opts.saving_to_file) {
1560 /* We're not saving the capture to a file; if "-q" wasn't specified,
1561 we should print packet information */
1563 print_packet_info = TRUE;
1565 /* We're saving to a file; if we're writing to the standard output.
1566 and we'll also be writing dissected packets to the standard
1567 output, reject the request. At best, we could redirect that
1568 to the standard error; we *can't* write both to the standard
1569 output and have either of them be useful. */
1570 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1571 cmdarg_err("You can't write both raw packet data and dissected packets"
1572 " to the standard output.");
1577 /* We're not saving the capture to a file; if "-q" wasn't specified,
1578 we should print packet information */
1580 print_packet_info = TRUE;
1583 #ifndef HAVE_LIBPCAP
1584 if (capture_option_specified)
1585 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1592 /* We don't support capture filters when reading from a capture file
1593 (the BPF compiler doesn't support all link-layer types that we
1594 support in capture files we read). */
1596 if (cf_name != NULL) {
1597 if (global_capture_opts.default_options.cfilter) {
1598 cmdarg_err("Only read filters, not capture filters, "
1599 "can be specified when reading a capture file.");
1606 if (output_action != WRITE_TEXT) {
1607 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1612 if (output_only != NULL) {
1615 if (!print_details) {
1616 cmdarg_err("-O requires -V");
1620 output_only_tables = g_hash_table_new (g_str_hash, g_str_equal);
1621 for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) {
1622 g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps);
1626 if (rfilter != NULL && !perform_two_pass_analysis) {
1627 /* Just a warning, so we don't return */
1628 cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y.");
1632 if (list_link_layer_types) {
1633 /* We're supposed to list the link-layer types for an interface;
1634 did the user also specify a capture file to be read? */
1636 /* Yes - that's bogus. */
1637 cmdarg_err("You can't specify -L and a capture file to be read.");
1640 /* No - did they specify a ring buffer option? */
1641 if (global_capture_opts.multi_files_on) {
1642 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1648 * "-r" was specified, so we're reading a capture file.
1649 * Capture options don't apply here.
1651 if (global_capture_opts.multi_files_on) {
1652 cmdarg_err("Multiple capture files requested, but "
1653 "a capture isn't being done.");
1656 if (global_capture_opts.has_file_duration) {
1657 cmdarg_err("Switching capture files after a time interval was specified, but "
1658 "a capture isn't being done.");
1661 if (global_capture_opts.has_ring_num_files) {
1662 cmdarg_err("A ring buffer of capture files was specified, but "
1663 "a capture isn't being done.");
1666 if (global_capture_opts.has_autostop_files) {
1667 cmdarg_err("A maximum number of capture files was specified, but "
1668 "a capture isn't being done.");
1672 /* Note: TShark now allows the restriction of a _read_ file by packet count
1673 * and byte count as well as a write file. Other autostop options remain valid
1674 * only for a write file.
1676 if (global_capture_opts.has_autostop_duration) {
1677 cmdarg_err("A maximum capture time was specified, but "
1678 "a capture isn't being done.");
1683 * "-r" wasn't specified, so we're doing a live capture.
1685 if (global_capture_opts.saving_to_file) {
1686 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1688 /* When capturing, we only support writing pcap or pcap-ng format. */
1689 if (out_file_type != WTAP_FILE_PCAP && out_file_type != WTAP_FILE_PCAPNG) {
1690 cmdarg_err("Live captures can only be saved in libpcap format.");
1693 if (global_capture_opts.multi_files_on) {
1694 /* Multiple-file mode doesn't work under certain conditions:
1695 a) it doesn't work if you're writing to the standard output;
1696 b) it doesn't work if you're writing to a pipe;
1698 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1699 cmdarg_err("Multiple capture files requested, but "
1700 "the capture is being written to the standard output.");
1703 if (global_capture_opts.output_to_pipe) {
1704 cmdarg_err("Multiple capture files requested, but "
1705 "the capture file is a pipe.");
1708 if (!global_capture_opts.has_autostop_filesize &&
1709 !global_capture_opts.has_file_duration) {
1710 cmdarg_err("Multiple capture files requested, but "
1711 "no maximum capture file size or duration was specified.");
1715 /* Currently, we don't support read or display filters when capturing
1716 and saving the packets. */
1717 if (rfilter != NULL) {
1718 cmdarg_err("Read filters aren't supported when capturing and saving the captured packets.");
1721 if (dfilter != NULL) {
1722 cmdarg_err("Display filters aren't supported when capturing and saving the captured packets.");
1726 /* They didn't specify a "-w" flag, so we won't be saving to a
1727 capture file. Check for options that only make sense if
1728 we're saving to a file. */
1729 if (global_capture_opts.has_autostop_filesize) {
1730 cmdarg_err("Maximum capture file size specified, but "
1731 "capture isn't being saved to a file.");
1734 if (global_capture_opts.multi_files_on) {
1735 cmdarg_err("Multiple capture files requested, but "
1736 "the capture isn't being saved to a file.");
1745 /* Start windows sockets */
1746 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1749 /* Notify all registered modules that have had any of their preferences
1750 changed either from one of the preferences file or from the command
1751 line that their preferences have changed. */
1754 /* At this point MATE will have registered its field array so we can
1755 have a tap filter with one of MATE's late-registered fields as part
1756 of the filter. We can now process all the "-z" arguments. */
1757 start_requested_stats();
1760 /* We currently don't support taps, or printing dissected packets,
1761 if we're writing to a pipe. */
1762 if (global_capture_opts.saving_to_file &&
1763 global_capture_opts.output_to_pipe) {
1764 if (tap_listeners_require_dissection()) {
1765 cmdarg_err("Taps aren't supported when saving to a pipe.");
1768 if (print_packet_info) {
1769 cmdarg_err("Printing dissected packets isn't supported when saving to a pipe.");
1775 /* disabled protocols as per configuration file */
1776 if (gdp_path == NULL && dp_path == NULL) {
1777 set_disabled_protos_list();
1780 /* Build the column format array */
1781 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1784 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1785 capture_opts_trim_ring_num_files(&global_capture_opts);
1788 if (rfilter != NULL) {
1789 if (!dfilter_compile(rfilter, &rfcode)) {
1790 cmdarg_err("%s", dfilter_error_msg);
1792 #ifdef HAVE_PCAP_OPEN_DEAD
1796 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1798 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1800 " Note: That read filter code looks like a valid capture filter;");
1802 " maybe you mixed them up?");
1811 cfile.rfcode = rfcode;
1813 if (dfilter != NULL) {
1814 if (!dfilter_compile(dfilter, &dfcode)) {
1815 cmdarg_err("%s", dfilter_error_msg);
1817 #ifdef HAVE_PCAP_OPEN_DEAD
1821 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1823 if (pcap_compile(pc, &fcode, dfilter, 0, 0) != -1) {
1825 " Note: That display filter code looks like a valid capture filter;");
1827 " maybe you mixed them up?");
1836 cfile.dfcode = dfcode;
1838 if (print_packet_info) {
1839 /* If we're printing as text or PostScript, we have
1840 to create a print stream. */
1841 if (output_action == WRITE_TEXT) {
1842 switch (print_format) {
1845 print_stream = print_stream_text_stdio_new(stdout);
1849 print_stream = print_stream_ps_stdio_new(stdout);
1853 g_assert_not_reached();
1858 /* We have to dissect each packet if:
1860 we're printing information about each packet;
1862 we're using a read filter on the packets;
1864 we're using a display filter on the packets;
1866 we're using any taps that need dissection. */
1867 do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection();
1871 * We're reading a capture file.
1875 * Immediately relinquish any special privileges we have; we must not
1876 * be allowed to read any capture files the user running TShark
1879 relinquish_special_privs_perm();
1880 print_current_user();
1882 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1887 /* Set timestamp precision; there should arguably be a command-line
1888 option to let the user set this. */
1889 switch(wtap_file_tsprecision(cfile.wth)) {
1890 case(WTAP_FILE_TSPREC_SEC):
1891 timestamp_set_precision(TS_PREC_AUTO_SEC);
1893 case(WTAP_FILE_TSPREC_DSEC):
1894 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1896 case(WTAP_FILE_TSPREC_CSEC):
1897 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1899 case(WTAP_FILE_TSPREC_MSEC):
1900 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1902 case(WTAP_FILE_TSPREC_USEC):
1903 timestamp_set_precision(TS_PREC_AUTO_USEC);
1905 case(WTAP_FILE_TSPREC_NSEC):
1906 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1909 g_assert_not_reached();
1912 /* Process the packets in the file */
1915 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type, out_file_name_res,
1916 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1917 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1919 err = load_cap_file(&cfile, NULL, out_file_type, out_file_name_res, 0, 0);
1922 CATCH(OutOfMemoryError) {
1926 "Sorry, but TShark has to terminate now!\n"
1928 "Some infos / workarounds can be found at:\n"
1929 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
1934 /* We still dump out the results of taps, etc., as we might have
1935 read some packets; however, we exit with an error status. */
1939 /* No capture file specified, so we're supposed to do a live capture
1940 (or get a list of link-layer types for a live capture device);
1941 do we have support for live captures? */
1943 /* trim the interface name and exit if that failed */
1944 exit_status = capture_opts_trim_iface(&global_capture_opts,
1945 ((prefs_p->capture_device) && (*prefs_p->capture_device != '\0')) ? get_if_name(prefs_p->capture_device) : NULL);
1946 if (exit_status != 0)
1949 /* if requested, list the link layer types and exit */
1950 if (list_link_layer_types) {
1953 /* Get the list of link-layer types for the capture devices. */
1954 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
1955 interface_options interface_opts;
1956 if_capabilities_t *caps;
1958 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
1959 caps = capture_get_if_capabilities(interface_opts.name, interface_opts.monitor_mode, &err_str);
1961 cmdarg_err("%s", err_str);
1965 if (caps->data_link_types == NULL) {
1966 cmdarg_err("The capture device \"%s\" has no data link types.", interface_opts.name);
1969 capture_opts_print_if_capabilities(caps, interface_opts.name, interface_opts.monitor_mode);
1970 free_if_capabilities(caps);
1975 if (print_packet_info) {
1976 if (!write_preamble(NULL)) {
1977 show_print_file_io_error(errno);
1980 } else if (!quiet) {
1982 * We're not printing information for each packet, and the user
1983 * didn't ask us not to print a count of packets as they arrive,
1984 * so print that count so the user knows that packets are arriving.
1986 * XXX - what if the user wants to do a live capture, doesn't want
1987 * to save it to a file, doesn't want information printed for each
1988 * packet, does want some "-z" statistic, and wants packet counts
1989 * so they know whether they're seeing any packets?
1991 print_packet_counts = TRUE;
1994 /* For now, assume libpcap gives microsecond precision. */
1995 timestamp_set_precision(TS_PREC_AUTO_USEC);
1998 * XXX - this returns FALSE if an error occurred, but it also
1999 * returns FALSE if the capture stops because a time limit
2000 * was reached (and possibly other limits), so we can't assume
2001 * it means an error.
2003 * The capture code is a bit twisty, so it doesn't appear to
2004 * be an easy fix. We just ignore the return value for now.
2005 * Instead, pass on the exit status from the capture child.
2008 exit_status = global_capture_opts.fork_child_status;
2010 if (print_packet_info) {
2011 if (!write_finale()) {
2013 show_print_file_io_error(err);
2017 /* No - complain. */
2018 cmdarg_err("This version of TShark was not built with support for capturing packets.");
2025 if (cfile.frames != NULL) {
2026 free_frame_data_sequence(cfile.frames);
2027 cfile.frames = NULL;
2030 draw_tap_listeners(TRUE);
2031 funnel_dump_all_text_windows();
2034 output_fields_free(output_fields);
2035 output_fields = NULL;
2040 /*#define USE_BROKEN_G_MAIN_LOOP*/
2042 #ifdef USE_BROKEN_G_MAIN_LOOP
2045 gboolean loop_running = FALSE;
2047 guint32 packet_count = 0;
2050 /* XXX - move to the right position / file */
2051 /* read from a pipe (callback) */
2052 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
2054 typedef struct pipe_input_tag {
2058 pipe_input_cb_t input_cb;
2059 guint pipe_input_id;
2061 GMutex *callback_running;
2065 static pipe_input_t pipe_input;
2068 /* The timer has expired, see if there's stuff to read from the pipe,
2069 if so, do the callback */
2071 pipe_timer_cb(gpointer data)
2077 pipe_input_t *pipe_input_p = data;
2078 gint iterations = 0;
2080 g_mutex_lock (pipe_input_p->callback_running);
2082 /* try to read data from the pipe only 5 times, to avoid blocking */
2083 while(iterations < 5) {
2084 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
2086 /* Oddly enough although Named pipes don't work on win9x,
2087 PeekNamedPipe does !!! */
2088 handle = (HANDLE) _get_osfhandle (pipe_input_p->source);
2089 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
2091 /* Get the child process exit status */
2092 GetExitCodeProcess((HANDLE)*(pipe_input_p->child_process),
2095 /* If the Peek returned an error, or there are bytes to be read
2096 or the childwatcher thread has terminated then call the normal
2098 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
2100 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
2102 /* And call the real handler */
2103 if (!pipe_input_p->input_cb(pipe_input_p->source, pipe_input_p->user_data)) {
2104 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
2105 /* pipe closed, return false so that the timer is stopped */
2106 g_mutex_unlock (pipe_input_p->callback_running);
2111 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
2112 /* No data, stop now */
2119 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
2121 g_mutex_unlock (pipe_input_p->callback_running);
2123 /* we didn't stopped the timer, so let it run */
2130 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
2133 pipe_input.source = source;
2134 pipe_input.child_process = child_process;
2135 pipe_input.user_data = user_data;
2136 pipe_input.input_cb = input_cb;
2139 #if GLIB_CHECK_VERSION(2,31,0)
2140 pipe_input.callback_running = g_malloc(sizeof(GMutex));
2141 g_mutex_init(pipe_input.callback_running);
2143 pipe_input.callback_running = g_mutex_new();
2145 /* Tricky to use pipes in win9x, as no concept of wait. NT can
2146 do this but that doesn't cover all win32 platforms. GTK can do
2147 this but doesn't seem to work over processes. Attempt to do
2148 something similar here, start a timer and check for data on every
2150 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
2151 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
2162 GString *str = g_string_new("");
2163 #ifdef USE_TSHARK_SELECT
2167 struct sigaction action, oldaction;
2171 * XXX - dropping privileges is still required, until code cleanup is done
2173 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
2174 * when it's done, we don't need special privileges to run tshark at all,
2175 * therefore we don't need to drop these privileges
2176 * The only thing we might want to keep is a warning if tshark is run as root,
2177 * as it's no longer necessary and potentially dangerous.
2179 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
2180 * We've opened the capture device, so we shouldn't need any special
2181 * privileges any more; relinquish those privileges.
2183 * XXX - if we have saved set-user-ID support, we should give up those
2184 * privileges immediately, and then reclaim them long enough to get
2185 * a list of network interfaces and to open one, and then give them
2186 * up again, so that stuff we do while processing the argument list,
2187 * reading the user's preferences, loading and starting plugins
2188 * (especially *user* plugins), etc. is done with the user's privileges,
2189 * not special privileges.
2191 relinquish_special_privs_perm();
2192 print_current_user();
2194 /* Cleanup all data structures used for dissection. */
2195 cleanup_dissection();
2196 /* Initialize all data structures used for dissection. */
2200 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
2201 SetConsoleCtrlHandler(capture_cleanup, TRUE);
2203 /* Catch SIGINT and SIGTERM and, if we get either of them,
2204 clean up and exit. If SIGHUP isn't being ignored, catch
2205 it too and, if we get it, clean up and exit.
2207 We restart any read that was in progress, so that it doesn't
2208 disrupt reading from the sync pipe. The signal handler tells
2209 the capture child to finish; it will report that it finished,
2210 or will exit abnormally, so we'll stop reading from the sync
2211 pipe, pick up the exit status, and quit. */
2212 memset(&action, 0, sizeof(action));
2213 action.sa_handler = capture_cleanup;
2214 action.sa_flags = SA_RESTART;
2215 sigemptyset(&action.sa_mask);
2216 sigaction(SIGTERM, &action, NULL);
2217 sigaction(SIGINT, &action, NULL);
2218 sigaction(SIGHUP, NULL, &oldaction);
2219 if (oldaction.sa_handler == SIG_DFL)
2220 sigaction(SIGHUP, &action, NULL);
2223 /* Catch SIGINFO and, if we get it and we're capturing to a file in
2224 quiet mode, report the number of packets we've captured.
2226 Again, restart any read that was in progress, so that it doesn't
2227 disrupt reading from the sync pipe. */
2228 action.sa_handler = report_counts_siginfo;
2229 action.sa_flags = SA_RESTART;
2230 sigemptyset(&action.sa_mask);
2231 sigaction(SIGINFO, &action, NULL);
2232 #endif /* SIGINFO */
2235 global_capture_opts.state = CAPTURE_PREPARING;
2237 /* Let the user know which interfaces were chosen. */
2238 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2239 interface_options interface_opts;
2241 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2242 interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
2243 global_capture_opts.ifaces = g_array_remove_index(global_capture_opts.ifaces, i);
2244 g_array_insert_val(global_capture_opts.ifaces, i, interface_opts);
2247 if (global_capture_opts.ifaces->len < 2) {
2249 if (global_capture_opts.ifaces->len < 4) {
2251 for (i = 0; i < global_capture_opts.ifaces->len; i++) {
2252 interface_options interface_opts;
2254 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, i);
2256 if (global_capture_opts.ifaces->len > 2) {
2257 g_string_append_printf(str, ",");
2259 g_string_append_printf(str, " ");
2260 if (i == global_capture_opts.ifaces->len - 1) {
2261 g_string_append_printf(str, "and ");
2264 g_string_append_printf(str, "'%s'", interface_opts.descr);
2267 g_string_append_printf(str, "%u interfaces", global_capture_opts.ifaces->len);
2269 if (really_quiet == FALSE)
2270 fprintf(stderr, "Capturing on %s\n", str->str);
2272 g_string_free(str, TRUE);
2274 ret = sync_pipe_start(&global_capture_opts);
2279 /* the actual capture loop
2281 * XXX - glib doesn't seem to provide any event based loop handling.
2283 * XXX - for whatever reason,
2284 * calling g_main_loop_new() ends up in 100% cpu load.
2286 * But that doesn't matter: in UNIX we can use select() to find an input
2287 * source with something to do.
2289 * But that doesn't matter because we're in a CLI (that doesn't need to
2290 * update a GUI or something at the same time) so it's OK if we block
2291 * trying to read from the pipe.
2293 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
2294 * wrong (but I leave it there in case I am...).
2297 #ifdef USE_TSHARK_SELECT
2299 FD_SET(pipe_input.source, &readfds);
2302 loop_running = TRUE;
2306 while (loop_running)
2308 #ifdef USE_TSHARK_SELECT
2309 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
2315 } else if (ret == 1) {
2317 /* Call the real handler */
2318 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
2319 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
2322 #ifdef USE_TSHARK_SELECT
2327 CATCH(OutOfMemoryError) {
2331 "Sorry, but TShark has to terminate now!\n"
2333 "Some infos / workarounds can be found at:\n"
2334 "http://wiki.wireshark.org/KnownBugs/OutOfMemory\n");
2342 /* XXX - move the call to main_window_update() out of capture_sync.c */
2343 /* dummy for capture_sync.c to make linker happy */
2344 void main_window_update(void)
2348 /* capture child detected an error */
2350 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
2352 cmdarg_err("%s", error_msg);
2353 cmdarg_err_cont("%s", secondary_error_msg);
2357 /* capture child detected an capture filter related error */
2359 capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
2361 dfilter_t *rfcode = NULL;
2362 interface_options interface_opts;
2364 g_assert(i < capture_opts->ifaces->len);
2365 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
2367 if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
2369 "Invalid capture filter \"%s\" for interface %s!\n"
2371 "That string looks like a valid display filter; however, it isn't a valid\n"
2372 "capture filter (%s).\n"
2374 "Note that display filters and capture filters don't have the same syntax,\n"
2375 "so you can't use most display filter expressions as capture filters.\n"
2377 "See the User's Guide for a description of the capture filter syntax.",
2378 interface_opts.cfilter, interface_opts.descr, error_message);
2379 dfilter_free(rfcode);
2382 "Invalid capture filter \"%s\" for interface %s!\n"
2384 "That string isn't a valid capture filter (%s).\n"
2385 "See the User's Guide for a description of the capture filter syntax.",
2386 interface_opts.cfilter, interface_opts.descr, error_message);
2391 /* capture child tells us we have a new (or the first) capture file */
2393 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2395 gboolean is_tempfile;
2398 if (capture_opts->state == CAPTURE_PREPARING) {
2399 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2401 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2403 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2405 /* free the old filename */
2406 if (capture_opts->save_file != NULL) {
2408 /* we start a new capture file, close the old one (if we had one before) */
2409 if ( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2410 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2411 wtap_close(((capture_file *) capture_opts->cf)->wth);
2413 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2416 g_free(capture_opts->save_file);
2417 is_tempfile = FALSE;
2419 /* we didn't had a save_file before, must be a tempfile */
2423 /* save the new filename */
2424 capture_opts->save_file = g_strdup(new_file);
2426 /* if we are in real-time mode, open the new file now */
2427 if (do_dissection) {
2428 /* Attempt to open the capture file and set up to read from it. */
2429 switch(cf_open((capture_file *)capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2433 /* Don't unlink (delete) the save file - leave it around,
2434 for debugging purposes. */
2435 g_free(capture_opts->save_file);
2436 capture_opts->save_file = NULL;
2441 capture_opts->state = CAPTURE_RUNNING;
2447 /* capture child tells us we have new packets to read */
2449 capture_input_new_packets(capture_options *capture_opts, int to_read)
2455 capture_file *cf = (capture_file *)capture_opts->cf;
2456 gboolean filtering_tap_listeners;
2461 * Prevent a SIGINFO handler from writing to the standard error while
2462 * we're doing so or writing to the standard output; instead, have it
2463 * just set a flag telling us to print that information when we're done.
2466 #endif /* SIGINFO */
2468 /* Do we have any tap listeners with filters? */
2469 filtering_tap_listeners = have_filtering_tap_listeners();
2471 /* Get the union of the flags for all tap listeners. */
2472 tap_flags = union_of_tap_listener_flags();
2474 if (do_dissection) {
2475 while (to_read-- && cf->wth) {
2476 wtap_cleareof(cf->wth);
2477 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2479 /* read from file failed, tell the capture child to stop */
2480 sync_pipe_stop(capture_opts);
2481 wtap_close(cf->wth);
2484 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2485 wtap_buf_ptr(cf->wth),
2486 filtering_tap_listeners, tap_flags);
2489 /* packet successfully read and gone through the "Read Filter" */
2495 * Dumpcap's doing all the work; we're not doing any dissection.
2496 * Count all the packets it wrote.
2498 packet_count += to_read;
2501 if (print_packet_counts) {
2502 /* We're printing packet counts. */
2503 if (packet_count != 0) {
2504 fprintf(stderr, "\r%u ", packet_count);
2505 /* stderr could be line buffered */
2512 * Allow SIGINFO handlers to write.
2517 * If a SIGINFO handler asked us to write out capture counts, do so.
2521 #endif /* SIGINFO */
2527 if ((print_packet_counts == FALSE) && (really_quiet == FALSE)) {
2528 /* Report the count only if we aren't printing a packet count
2529 as packets arrive. */
2530 fprintf(stderr, "%u packet%s captured\n", packet_count,
2531 plurality(packet_count, "", "s"));
2534 infoprint = FALSE; /* we just reported it */
2535 #endif /* SIGINFO */
2540 report_counts_siginfo(int signum _U_)
2542 int sav_errno = errno;
2543 /* If we've been told to delay printing, just set a flag asking
2544 that we print counts (if we're supposed to), otherwise print
2545 the count of packets captured (if we're supposed to). */
2552 #endif /* SIGINFO */
2555 /* capture child detected any packet drops? */
2557 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2559 if (print_packet_counts) {
2560 /* We're printing packet counts to stderr.
2561 Send a newline so that we move to the line after the packet count. */
2562 fprintf(stderr, "\n");
2566 /* We're printing packet counts to stderr.
2567 Send a newline so that we move to the line after the packet count. */
2568 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2574 * Capture child closed its side of the pipe, report any error and
2575 * do the required cleanup.
2578 capture_input_closed(capture_options *capture_opts, gchar *msg)
2580 capture_file *cf = (capture_file *) capture_opts->cf;
2583 fprintf(stderr, "tshark: %s\n", msg);
2587 if (cf != NULL && cf->wth != NULL) {
2588 wtap_close(cf->wth);
2589 if (cf->is_tempfile) {
2590 ws_unlink(cf->filename);
2593 #ifdef USE_BROKEN_G_MAIN_LOOP
2594 /*g_main_loop_quit(loop);*/
2597 loop_running = FALSE;
2606 capture_cleanup(DWORD ctrltype _U_)
2608 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2609 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2610 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2611 like SIGTERM at least when the machine's shutting down.
2613 For now, we handle them all as indications that we should clean up
2614 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2617 We must return TRUE so that no other handler - such as one that would
2618 terminate the process - gets called.
2620 XXX - for some reason, typing ^C to TShark, if you run this in
2621 a Cygwin console window in at least some versions of Cygwin,
2622 causes TShark to terminate immediately; this routine gets
2623 called, but the main loop doesn't get a chance to run and
2624 exit cleanly, at least if this is compiled with Microsoft Visual
2625 C++ (i.e., it's a property of the Cygwin console window or Bash;
2626 it happens if TShark is not built with Cygwin - for all I know,
2627 building it with Cygwin may make the problem go away). */
2629 /* tell the capture child to stop */
2630 sync_pipe_stop(&global_capture_opts);
2632 /* don't stop our own loop already here, otherwise status messages and
2633 * cleanup wouldn't be done properly. The child will indicate the stop of
2634 * everything by calling capture_input_closed() later */
2640 capture_cleanup(int signum _U_)
2642 /* tell the capture child to stop */
2643 sync_pipe_stop(&global_capture_opts);
2645 /* don't stop our own loop already here, otherwise status messages and
2646 * cleanup wouldn't be done properly. The child will indicate the stop of
2647 * everything by calling capture_input_closed() later */
2650 #endif /* HAVE_LIBPCAP */
2653 process_packet_first_pass(capture_file *cf,
2654 gint64 offset, struct wtap_pkthdr *whdr,
2659 gboolean create_proto_tree = FALSE;
2663 /* The frame number of this packet is one more than the count of
2664 frames in this packet. */
2665 framenum = cf->count + 1;
2667 /* If we're not running a display filter and we're not printing any
2668 packet information, we don't need to do a dissection. This means
2669 that all packets can be marked as 'passed'. */
2672 frame_data_init(&fdlocal, framenum, whdr, offset, cum_bytes);
2674 /* If we're going to print packet information, or we're going to
2675 run a read filter, or display filter, or we're going to process taps, set up to
2676 do a dissection and do so. */
2677 if (do_dissection) {
2678 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2679 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2680 /* Grab any resolved addresses */
2681 host_name_lookup_process();
2683 /* If we're going to be applying a filter, we'll need to
2684 create a protocol tree against which to apply the filter. */
2686 create_proto_tree = TRUE;
2688 /* We're not going to display the protocol tree on this pass,
2689 so it's not going to be "visible". */
2690 epan_dissect_init(&edt, create_proto_tree, FALSE);
2692 /* If we're running a read filter, prime the epan_dissect_t with that
2695 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2697 frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time,
2698 &first_ts, prev_dis, prev_cap);
2700 epan_dissect_run(&edt, whdr, pd, &fdlocal, NULL);
2702 /* Run the read filter if we have one. */
2704 passed = dfilter_apply_edt(cf->rfcode, &edt);
2708 frame_data_set_after_dissect(&fdlocal, &cum_bytes);
2709 prev_cap = prev_dis = frame_data_sequence_add(cf->frames, &fdlocal);
2711 g_slist_foreach(edt.pi.dependent_frames, find_and_mark_frame_depended_upon, cf->frames);
2715 /* if we don't add it to the frame_data_sequence, clean it up right now
2717 frame_data_destroy(&fdlocal);
2718 /* TODO, bug #8160 */
2720 prev_cap_frame = fdlocal;
2721 prev_cap = &prev_cap_frame;
2726 epan_dissect_cleanup(&edt);
2732 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2733 struct wtap_pkthdr *phdr, const guchar *pd,
2734 gboolean filtering_tap_listeners, guint tap_flags)
2736 gboolean create_proto_tree;
2741 /* If we're not running a display filter and we're not printing any
2742 packet information, we don't need to do a dissection. This means
2743 that all packets can be marked as 'passed'. */
2746 /* If we're going to print packet information, or we're going to
2747 run a read filter, or we're going to process taps, set up to
2748 do a dissection and do so. */
2749 if (do_dissection) {
2750 if (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
2751 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns)
2752 /* Grab any resolved addresses */
2753 host_name_lookup_process();
2755 if (cf->dfcode || print_details || filtering_tap_listeners ||
2756 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2757 create_proto_tree = TRUE;
2759 create_proto_tree = FALSE;
2761 /* The protocol tree will be "visible", i.e., printed, only if we're
2762 printing packet details, which is true if we're printing stuff
2763 ("print_packet_info" is true) and we're in verbose mode
2764 ("packet_details" is true). */
2765 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
2767 /* If we're running a display filter, prime the epan_dissect_t with that
2770 epan_dissect_prime_dfilter(&edt, cf->dfcode);
2772 col_custom_prime_edt(&edt, &cf->cinfo);
2774 /* We only need the columns if either
2775 1) some tap needs the columns
2777 2) we're printing packet info but we're *not* verbose; in verbose
2778 mode, we print the protocol tree, not the protocol summary.
2780 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary))
2785 epan_dissect_run_with_taps(&edt, phdr, pd, fdata, cinfo);
2787 /* Run the read/display filter if we have one. */
2789 passed = dfilter_apply_edt(cf->dfcode, &edt);
2793 /* Process this packet. */
2794 if (print_packet_info) {
2795 /* We're printing packet information; print the information for
2798 print_packet(cf, &edt);
2800 print_packet(cf, NULL);
2802 /* The ANSI C standard does not appear to *require* that a line-buffered
2803 stream be flushed to the host environment whenever a newline is
2804 written, it just says that, on such a stream, characters "are
2805 intended to be transmitted to or from the host environment as a
2806 block when a new-line character is encountered".
2808 The Visual C++ 6.0 C implementation doesn't do what is intended;
2809 even if you set a stream to be line-buffered, it still doesn't
2810 flush the buffer at the end of every line.
2812 So, if the "-l" flag was specified, we flush the standard output
2813 at the end of a packet. This will do the right thing if we're
2814 printing packet summary lines, and, as we print the entire protocol
2815 tree for a single packet without waiting for anything to happen,
2816 it should be as good as line-buffered mode if we're printing
2817 protocol trees. (The whole reason for the "-l" flag in either
2818 tcpdump or TShark is to allow the output of a live capture to
2819 be piped to a program or script and to have that script see the
2820 information for the packet as soon as it's printed, rather than
2821 having to wait until a standard I/O buffer fills up. */
2825 if (ferror(stdout)) {
2826 show_print_file_io_error(errno);
2832 if (do_dissection) {
2833 epan_dissect_cleanup(&edt);
2835 return passed || fdata->flags.dependent_of_displayed;
2839 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2840 gboolean out_file_name_res, int max_packet_count, gint64 max_byte_count)
2843 int snapshot_length;
2847 gchar *err_info = NULL;
2849 char *save_file_string = NULL;
2850 gboolean filtering_tap_listeners;
2852 wtapng_section_t *shb_hdr;
2853 wtapng_iface_descriptions_t *idb_inf;
2856 shb_hdr = wtap_file_get_shb_info(cf->wth);
2857 idb_inf = wtap_file_get_idb_info(cf->wth);
2858 #ifdef PCAP_NG_DEFAULT
2859 if (idb_inf->number_of_interfaces > 0) {
2860 linktype = WTAP_ENCAP_PER_PACKET;
2862 linktype = wtap_file_encap(cf->wth);
2865 linktype = wtap_file_encap(cf->wth);
2867 if (save_file != NULL) {
2868 /* Get a string that describes what we're writing to */
2869 save_file_string = output_file_description(save_file);
2871 /* Set up to write to the capture file. */
2872 snapshot_length = wtap_snapshot_length(cf->wth);
2873 if (snapshot_length == 0) {
2874 /* Snapshot length of input file not known. */
2875 snapshot_length = WTAP_MAX_PACKET_SIZE;
2877 /* If we don't have an application name add Tshark */
2878 if (shb_hdr->shb_user_appl == NULL) {
2879 g_snprintf(appname, sizeof(appname), "TShark " VERSION "%s", wireshark_svnversion);
2880 shb_hdr->shb_user_appl = appname;
2883 pdh = wtap_dump_open_ng(save_file, out_file_type, linktype, snapshot_length,
2884 FALSE /* compressed */, shb_hdr, idb_inf, &err);
2890 /* We couldn't set up to write to the capture file. */
2893 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2894 cmdarg_err("Capture files can't be written in that format.");
2897 case WTAP_ERR_UNSUPPORTED_ENCAP:
2898 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2899 cmdarg_err("The capture file being read can't be written as a "
2900 "\"%s\" file.", wtap_file_type_short_string(out_file_type));
2903 case WTAP_ERR_CANT_OPEN:
2904 cmdarg_err("The %s couldn't be created for some "
2905 "unknown reason.", save_file_string);
2908 case WTAP_ERR_SHORT_WRITE:
2909 cmdarg_err("A full header couldn't be written to the %s.",
2914 cmdarg_err("The %s could not be created: %s.", save_file_string,
2915 wtap_strerror(err));
2921 if (print_packet_info) {
2922 if (!write_preamble(cf)) {
2924 show_print_file_io_error(err);
2931 if (pdh && out_file_name_res) {
2932 if (!wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list())) {
2933 cmdarg_err("The file format \"%s\" doesn't support name resolution information.",
2934 wtap_file_type_short_string(out_file_type));
2938 /* Do we have any tap listeners with filters? */
2939 filtering_tap_listeners = have_filtering_tap_listeners();
2941 /* Get the union of the flags for all tap listeners. */
2942 tap_flags = union_of_tap_listener_flags();
2944 if (perform_two_pass_analysis) {
2946 int old_max_packet_count = max_packet_count;
2948 /* Allocate a frame_data_sequence for all the frames. */
2949 cf->frames = new_frame_data_sequence();
2951 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2952 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2953 wtap_buf_ptr(cf->wth))) {
2954 /* Stop reading if we have the maximum number of packets;
2955 * When the -c option has not been used, max_packet_count
2956 * starts at 0, which practically means, never stop reading.
2957 * (unless we roll over max_packet_count ?)
2959 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2960 err = 0; /* This is not an error */
2966 /* Close the sequential I/O side, to free up memory it requires. */
2967 wtap_sequential_close(cf->wth);
2969 /* Allow the protocol dissectors to free up memory that they
2970 * don't need after the sequential run-through of the packets. */
2971 postseq_cleanup_all_protocols();
2973 max_packet_count = old_max_packet_count;
2975 for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) {
2976 fdata = frame_data_sequence_find(cf->frames, framenum);
2977 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->phdr,
2978 cf->pd, fdata->cap_len, &err, &err_info)) {
2979 if (process_packet_second_pass(cf, fdata,
2981 filtering_tap_listeners, tap_flags)) {
2982 /* Either there's no read filtering or this packet passed the
2983 filter, so, if we're writing to a capture file, write
2986 if (!wtap_dump(pdh, &cf->phdr, cf->pd, &err)) {
2987 /* Error writing to a capture file */
2990 case WTAP_ERR_UNSUPPORTED_ENCAP:
2992 * This is a problem with the particular frame we're writing;
2993 * note that, and give the frame number.
2995 * XXX - framenum is not necessarily the frame number in
2996 * the input file if there was a read filter.
2999 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3000 framenum, cf->filename,
3001 wtap_file_type_short_string(out_file_type));
3005 show_capture_file_io_error(save_file, err, FALSE);
3008 wtap_dump_close(pdh, &err);
3013 /* Stop reading if we have the maximum number of packets;
3014 * When the -c option has not been used, max_packet_count
3015 * starts at 0, which practically means, never stop reading.
3016 * (unless we roll over max_packet_count ?)
3018 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3019 err = 0; /* This is not an error */
3028 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
3031 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
3032 wtap_buf_ptr(cf->wth),
3033 filtering_tap_listeners, tap_flags)) {
3034 /* Either there's no read filtering or this packet passed the
3035 filter, so, if we're writing to a capture file, write
3038 if (!wtap_dump(pdh, wtap_phdr(cf->wth), wtap_buf_ptr(cf->wth), &err)) {
3039 /* Error writing to a capture file */
3042 case WTAP_ERR_UNSUPPORTED_ENCAP:
3044 * This is a problem with the particular frame we're writing;
3045 * note that, and give the frame number.
3048 "Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
3049 framenum, cf->filename,
3050 wtap_file_type_short_string(out_file_type));
3054 show_capture_file_io_error(save_file, err, FALSE);
3057 wtap_dump_close(pdh, &err);
3062 /* Stop reading if we have the maximum number of packets;
3063 * When the -c option has not been used, max_packet_count
3064 * starts at 0, which practically means, never stop reading.
3065 * (unless we roll over max_packet_count ?)
3067 if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
3068 err = 0; /* This is not an error */
3077 * Print a message noting that the read failed somewhere along the line.
3079 * If we're printing packet data, and the standard output and error are
3080 * going to the same place, flush the standard output, so everything
3081 * buffered up is written, and then print a newline to the standard error
3082 * before printing the error message, to separate it from the packet
3083 * data. (Alas, that only works on UN*X; st_dev is meaningless, and
3084 * the _fstat() documentation at Microsoft doesn't indicate whether
3085 * st_ino is even supported.)
3088 if (print_packet_info) {
3089 struct stat stat_stdout, stat_stderr;
3091 if (fstat(1, &stat_stdout) == 0 && fstat(2, &stat_stderr) == 0) {
3092 if (stat_stdout.st_dev == stat_stderr.st_dev &&
3093 stat_stdout.st_ino == stat_stderr.st_ino) {
3095 fprintf(stderr, "\n");
3102 case WTAP_ERR_UNSUPPORTED:
3103 cmdarg_err("The file \"%s\" contains record data that TShark doesn't support.\n(%s)",
3104 cf->filename, err_info);
3108 case WTAP_ERR_UNSUPPORTED_ENCAP:
3109 cmdarg_err("The file \"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
3110 cf->filename, err_info);
3114 case WTAP_ERR_CANT_READ:
3115 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
3119 case WTAP_ERR_SHORT_READ:
3120 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
3124 case WTAP_ERR_BAD_FILE:
3125 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
3126 cf->filename, err_info);
3130 case WTAP_ERR_DECOMPRESS:
3131 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n"
3132 "(%s)", cf->filename, err_info);
3136 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
3137 cf->filename, wtap_strerror(err));
3140 if (save_file != NULL) {
3141 /* Now close the capture file. */
3142 if (!wtap_dump_close(pdh, &err))
3143 show_capture_file_io_error(save_file, err, TRUE);
3146 if (save_file != NULL) {
3147 /* Now close the capture file. */
3148 if (!wtap_dump_close(pdh, &err))
3149 show_capture_file_io_error(save_file, err, TRUE);
3151 if (print_packet_info) {
3152 if (!write_finale()) {
3154 show_print_file_io_error(err);
3161 wtap_close(cf->wth);
3164 g_free(save_file_string);
3171 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
3173 gboolean filtering_tap_listeners, guint tap_flags)
3176 gboolean create_proto_tree;
3181 /* Count this packet. */
3184 /* If we're not running a display filter and we're not printing any
3185 packet information, we don't need to do a dissection. This means
3186 that all packets can be marked as 'passed'. */
3189 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
3191 /* If we're going to print packet information, or we're going to
3192 run a read filter, or we're going to process taps, set up to
3193 do a dissection and do so. */
3194 if (do_dissection) {
3195 if (print_packet_info && (gbl_resolv_flags.mac_name || gbl_resolv_flags.network_name ||
3196 gbl_resolv_flags.transport_name || gbl_resolv_flags.concurrent_dns))
3197 /* Grab any resolved addresses */
3198 host_name_lookup_process();
3200 if (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners ||
3201 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
3202 create_proto_tree = TRUE;
3204 create_proto_tree = FALSE;
3206 /* The protocol tree will be "visible", i.e., printed, only if we're
3207 printing packet details, which is true if we're printing stuff
3208 ("print_packet_info" is true) and we're in verbose mode
3209 ("packet_details" is true). */
3210 epan_dissect_init(&edt, create_proto_tree, print_packet_info && print_details);
3212 /* If we're running a filter, prime the epan_dissect_t with that
3215 epan_dissect_prime_dfilter(&edt, cf->rfcode);
3217 epan_dissect_prime_dfilter(&edt, cf->dfcode);
3219 col_custom_prime_edt(&edt, &cf->cinfo);
3221 /* We only need the columns if either
3222 1) some tap needs the columns
3224 2) we're printing packet info but we're *not* verbose; in verbose
3225 mode, we print the protocol tree, not the protocol summary.
3227 3) there is a column mapped as an individual field */
3228 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields))
3233 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
3234 &first_ts, prev_dis, prev_cap);
3236 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, cinfo);
3238 /* Run the filters if we have them. */
3240 passed = dfilter_apply_edt(cf->rfcode, &edt);
3241 if (passed && cf->dfcode)
3242 passed = dfilter_apply_edt(cf->dfcode, &edt);
3246 frame_data_set_after_dissect(&fdata, &cum_bytes);
3248 /* Process this packet. */
3249 if (print_packet_info) {
3250 /* We're printing packet information; print the information for
3253 print_packet(cf, &edt);
3255 print_packet(cf, NULL);
3257 /* The ANSI C standard does not appear to *require* that a line-buffered
3258 stream be flushed to the host environment whenever a newline is
3259 written, it just says that, on such a stream, characters "are
3260 intended to be transmitted to or from the host environment as a
3261 block when a new-line character is encountered".
3263 The Visual C++ 6.0 C implementation doesn't do what is intended;
3264 even if you set a stream to be line-buffered, it still doesn't
3265 flush the buffer at the end of every line.
3267 So, if the "-l" flag was specified, we flush the standard output
3268 at the end of a packet. This will do the right thing if we're
3269 printing packet summary lines, and, as we print the entire protocol
3270 tree for a single packet without waiting for anything to happen,
3271 it should be as good as line-buffered mode if we're printing
3272 protocol trees. (The whole reason for the "-l" flag in either
3273 tcpdump or TShark is to allow the output of a live capture to
3274 be piped to a program or script and to have that script see the
3275 information for the packet as soon as it's printed, rather than
3276 having to wait until a standard I/O buffer fills up. */
3280 if (ferror(stdout)) {
3281 show_print_file_io_error(errno);
3286 /* this must be set after print_packet() [bug #8160] */
3287 prev_dis_frame = fdata;
3288 prev_dis = &prev_dis_frame;
3291 prev_cap_frame = fdata;
3292 prev_cap = &prev_cap_frame;
3294 if (do_dissection) {
3295 epan_dissect_cleanup(&edt);
3296 frame_data_destroy(&fdata);
3302 write_preamble(capture_file *cf)
3304 switch (output_action) {
3307 return print_preamble(print_stream, cf ? cf->filename : NULL);
3311 write_pdml_preamble(stdout, cf ? cf->filename : NULL);
3313 write_psml_preamble(stdout);
3314 return !ferror(stdout);
3317 write_fields_preamble(output_fields, stdout);
3318 return !ferror(stdout);
3321 g_assert_not_reached();
3327 get_line_buf(size_t len)
3329 static char *line_bufp = NULL;
3330 static size_t line_buf_len = 256;
3331 size_t new_line_buf_len;
3333 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
3334 new_line_buf_len *= 2)
3336 if (line_bufp == NULL) {
3337 line_buf_len = new_line_buf_len;
3338 line_bufp = (char *)g_malloc(line_buf_len + 1);
3340 if (new_line_buf_len > line_buf_len) {
3341 line_buf_len = new_line_buf_len;
3342 line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1);
3349 print_columns(capture_file *cf)
3356 line_bufp = get_line_buf(256);
3359 for (i = 0; i < cf->cinfo.num_cols; i++) {
3360 /* Skip columns not marked as visible. */
3361 if (!get_column_visible(i))
3363 switch (cf->cinfo.col_fmt[i]) {
3367 * Don't print this if we're doing a live capture from a network
3368 * interface - if we're doing a live capture, you won't be
3369 * able to look at the capture in the future (it's not being
3370 * saved anywhere), so the frame numbers are unlikely to be
3373 * (XXX - it might be nice to be able to save and print at
3374 * the same time, sort of like an "Update list of packets
3375 * in real time" capture in Wireshark.)
3377 if (global_capture_opts.ifaces->len > 0)
3380 column_len = strlen(cf->cinfo.col_data[i]);
3383 line_bufp = get_line_buf(buf_offset + column_len);
3384 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%3s", cf->cinfo.col_data[i]);
3390 case COL_ABS_DATE_TIME:
3392 case COL_UTC_DATE_TIME: /* XXX - wider */
3393 column_len = strlen(cf->cinfo.col_data[i]);
3394 if (column_len < 10)
3396 line_bufp = get_line_buf(buf_offset + column_len);
3397 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%10s", cf->cinfo.col_data[i]);
3403 case COL_DEF_DL_SRC:
3404 case COL_RES_DL_SRC:
3405 case COL_UNRES_DL_SRC:
3406 case COL_DEF_NET_SRC:
3407 case COL_RES_NET_SRC:
3408 case COL_UNRES_NET_SRC:
3409 column_len = strlen(cf->cinfo.col_data[i]);
3410 if (column_len < 12)
3412 line_bufp = get_line_buf(buf_offset + column_len);
3413 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%12s", cf->cinfo.col_data[i]);
3419 case COL_DEF_DL_DST:
3420 case COL_RES_DL_DST:
3421 case COL_UNRES_DL_DST:
3422 case COL_DEF_NET_DST:
3423 case COL_RES_NET_DST:
3424 case COL_UNRES_NET_DST:
3425 column_len = strlen(cf->cinfo.col_data[i]);
3426 if (column_len < 12)
3428 line_bufp = get_line_buf(buf_offset + column_len);
3429 g_snprintf(line_bufp + buf_offset, (int)column_len + 1, "%-12s", cf->cinfo.col_data[i]);
3433 column_len = strlen(cf->cinfo.col_data[i]);
3434 line_bufp = get_line_buf(buf_offset + column_len);
3435 g_strlcat(line_bufp + buf_offset, cf->cinfo.col_data[i], column_len + 1);
3438 buf_offset += column_len;
3439 if (i != cf->cinfo.num_cols - 1) {
3441 * This isn't the last column, so we need to print a
3442 * separator between this column and the next.
3444 * If we printed a network source and are printing a
3445 * network destination of the same type next, separate
3446 * them with " -> "; if we printed a network destination
3447 * and are printing a network source of the same type
3448 * next, separate them with " <- "; otherwise separate them
3451 * We add enough space to the buffer for " <- " or " -> ",
3452 * even if we're only adding " ".
3454 line_bufp = get_line_buf(buf_offset + 4);
3455 switch (cf->cinfo.col_fmt[i]) {
3460 switch (cf->cinfo.col_fmt[i + 1]) {
3465 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3470 g_strlcat(line_bufp + buf_offset, " ", 5);
3476 case COL_DEF_DL_SRC:
3477 case COL_RES_DL_SRC:
3478 case COL_UNRES_DL_SRC:
3479 switch (cf->cinfo.col_fmt[i + 1]) {
3481 case COL_DEF_DL_DST:
3482 case COL_RES_DL_DST:
3483 case COL_UNRES_DL_DST:
3484 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3489 g_strlcat(line_bufp + buf_offset, " ", 5);
3495 case COL_DEF_NET_SRC:
3496 case COL_RES_NET_SRC:
3497 case COL_UNRES_NET_SRC:
3498 switch (cf->cinfo.col_fmt[i + 1]) {
3500 case COL_DEF_NET_DST:
3501 case COL_RES_NET_DST:
3502 case COL_UNRES_NET_DST:
3503 g_strlcat(line_bufp + buf_offset, " -> ", 5);
3508 g_strlcat(line_bufp + buf_offset, " ", 5);
3517 switch (cf->cinfo.col_fmt[i + 1]) {
3522 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3527 g_strlcat(line_bufp + buf_offset, " ", 5);
3533 case COL_DEF_DL_DST:
3534 case COL_RES_DL_DST:
3535 case COL_UNRES_DL_DST:
3536 switch (cf->cinfo.col_fmt[i + 1]) {
3538 case COL_DEF_DL_SRC:
3539 case COL_RES_DL_SRC:
3540 case COL_UNRES_DL_SRC:
3541 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3546 g_strlcat(line_bufp + buf_offset, " ", 5);
3552 case COL_DEF_NET_DST:
3553 case COL_RES_NET_DST:
3554 case COL_UNRES_NET_DST:
3555 switch (cf->cinfo.col_fmt[i + 1]) {
3557 case COL_DEF_NET_SRC:
3558 case COL_RES_NET_SRC:
3559 case COL_UNRES_NET_SRC:
3560 g_strlcat(line_bufp + buf_offset, " <- ", 5);
3565 g_strlcat(line_bufp + buf_offset, " ", 5);
3572 g_strlcat(line_bufp + buf_offset, " ", 5);
3578 return print_line(print_stream, 0, line_bufp);
3582 print_packet(capture_file *cf, epan_dissect_t *edt)
3584 print_args_t print_args;
3586 if (print_summary || output_fields_has_cols(output_fields)) {
3587 /* Just fill in the columns. */
3588 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3590 if (print_summary) {
3591 /* Now print them. */
3592 switch (output_action) {
3595 if (!print_columns(cf))
3600 proto_tree_write_psml(edt, stdout);
3601 return !ferror(stdout);
3602 case WRITE_FIELDS: /*No non-verbose "fields" format */
3603 g_assert_not_reached();
3608 if (print_details) {
3609 /* Print the information in the protocol tree. */
3610 switch (output_action) {
3613 /* Only initialize the fields that are actually used in proto_tree_print.
3614 * This is particularly important for .range, as that's heap memory which
3615 * we would otherwise have to g_free().
3616 print_args.to_file = TRUE;
3617 print_args.format = print_format;
3618 print_args.print_summary = print_summary;
3619 print_args.print_formfeed = FALSE;
3620 packet_range_init(&print_args.range, &cfile);
3622 print_args.print_hex = print_hex;
3623 print_args.print_dissections = print_details ? print_dissections_expanded : print_dissections_none;
3625 if (!proto_tree_print(&print_args, edt, print_stream))
3628 if (!print_line(print_stream, 0, separator))
3634 proto_tree_write_pdml(edt, stdout);
3636 return !ferror(stdout);
3638 proto_tree_write_fields(output_fields, edt, &cf->cinfo, stdout);
3640 return !ferror(stdout);
3644 if (print_summary || print_details) {
3645 if (!print_line(print_stream, 0, ""))
3648 if (!print_hex_data(print_stream, edt))
3650 if (!print_line(print_stream, 0, separator))
3659 switch (output_action) {
3662 return print_finale(print_stream);
3666 write_pdml_finale(stdout);
3668 write_psml_finale(stdout);
3669 return !ferror(stdout);
3672 write_fields_finale(output_fields, stdout);
3673 return !ferror(stdout);
3676 g_assert_not_reached();
3682 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3686 char err_msg[2048+1];
3688 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3692 /* The open succeeded. Fill in the information for this file. */
3694 /* Cleanup all data structures used for dissection. */
3695 cleanup_dissection();
3696 /* Initialize all data structures used for dissection. */
3700 cf->f_datalen = 0; /* not used, but set it anyway */
3702 /* Set the file name because we need it to set the follow stream filter.
3703 XXX - is that still true? We need it for other reasons, though,
3705 cf->filename = g_strdup(fname);
3707 /* Indicate whether it's a permanent or temporary file. */
3708 cf->is_tempfile = is_tempfile;
3710 /* No user changes yet. */
3711 cf->unsaved_changes = FALSE;
3713 cf->cd_t = wtap_file_type(cf->wth);
3715 cf->drops_known = FALSE;
3717 cf->snap = wtap_snapshot_length(cf->wth);
3718 if (cf->snap == 0) {
3719 /* Snapshot length not known. */
3720 cf->has_snap = FALSE;
3721 cf->snap = WTAP_MAX_PACKET_SIZE;
3723 cf->has_snap = TRUE;
3724 nstime_set_zero(&cf->elapsed_time);
3725 nstime_set_unset(&first_ts);
3729 cf->state = FILE_READ_IN_PROGRESS;
3731 wtap_set_cb_new_ipv4(cf->wth, add_ipv4_name);
3732 wtap_set_cb_new_ipv6(cf->wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
3737 g_snprintf(err_msg, sizeof err_msg,
3738 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3739 cmdarg_err("%s", err_msg);
3744 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3746 char *save_file_string;
3748 save_file_string = output_file_description(fname);
3753 cmdarg_err("Not all the packets could be written to the %s because there is "
3754 "no space left on the file system.",
3760 cmdarg_err("Not all the packets could be written to the %s because you are "
3761 "too close to, or over your disk quota.",
3766 case WTAP_ERR_CANT_CLOSE:
3767 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3771 case WTAP_ERR_SHORT_WRITE:
3772 cmdarg_err("Not all the packets could be written to the %s.",
3778 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3779 wtap_strerror(err));
3781 cmdarg_err("An error occurred while writing to the %s: %s.",
3782 save_file_string, wtap_strerror(err));
3786 g_free(save_file_string);
3790 show_print_file_io_error(int err)
3795 cmdarg_err("Not all the packets could be printed because there is "
3796 "no space left on the file system.");
3801 cmdarg_err("Not all the packets could be printed because you are "
3802 "too close to, or over your disk quota.");
3807 cmdarg_err("An error occurred while printing packets: %s.",
3814 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3818 static char errmsg_errno[1024+1];
3821 /* Wiretap error. */
3824 case WTAP_ERR_NOT_REGULAR_FILE:
3825 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3828 case WTAP_ERR_RANDOM_OPEN_PIPE:
3829 /* Seen only when opening a capture file for reading. */
3830 errmsg = "The file \"%s\" is a pipe or FIFO; TShark can't read pipe or FIFO files in two-pass mode.";
3833 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3834 /* Seen only when opening a capture file for reading. */
3835 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3838 case WTAP_ERR_UNSUPPORTED:
3839 /* Seen only when opening a capture file for reading. */
3840 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3841 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3844 errmsg = errmsg_errno;
3847 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3848 /* Seen only when opening a capture file for writing. */
3849 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3850 "The file \"%%s\" is a pipe, and \"%s\" capture files can't be "
3851 "written to a pipe.", wtap_file_type_short_string(file_type));
3852 errmsg = errmsg_errno;
3855 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3856 /* Seen only when opening a capture file for writing. */
3857 errmsg = "TShark doesn't support writing capture files in that format.";
3860 case WTAP_ERR_UNSUPPORTED_ENCAP:
3862 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3863 "TShark can't save this capture as a \"%s\" file.",
3864 wtap_file_type_short_string(file_type));
3866 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3867 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3871 errmsg = errmsg_errno;
3874 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3876 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3877 "TShark can't save this capture as a \"%s\" file.",
3878 wtap_file_type_short_string(file_type));
3879 errmsg = errmsg_errno;
3881 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3884 case WTAP_ERR_BAD_FILE:
3885 /* Seen only when opening a capture file for reading. */
3886 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3887 "The file \"%%s\" appears to be damaged or corrupt.\n"
3890 errmsg = errmsg_errno;
3893 case WTAP_ERR_CANT_OPEN:
3895 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3897 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3900 case WTAP_ERR_SHORT_READ:
3901 errmsg = "The file \"%s\" appears to have been cut short"
3902 " in the middle of a packet or other data.";
3905 case WTAP_ERR_SHORT_WRITE:
3906 errmsg = "A full header couldn't be written to the file \"%s\".";
3909 case WTAP_ERR_COMPRESSION_NOT_SUPPORTED:
3910 errmsg = "This file type cannot be written as a compressed file.";
3913 case WTAP_ERR_DECOMPRESS:
3914 /* Seen only when opening a capture file for reading. */
3915 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3916 "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
3919 errmsg = errmsg_errno;
3923 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3924 "The file \"%%s\" could not be %s: %s.",
3925 for_writing ? "created" : "opened",
3926 wtap_strerror(err));
3927 errmsg = errmsg_errno;
3931 errmsg = file_open_error_message(err, for_writing);
3936 * Open/create errors are reported with an console message in TShark.
3939 open_failure_message(const char *filename, int err, gboolean for_writing)
3941 fprintf(stderr, "tshark: ");
3942 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3943 fprintf(stderr, "\n");
3948 * General errors are reported with an console message in TShark.
3951 failure_message(const char *msg_format, va_list ap)
3953 fprintf(stderr, "tshark: ");
3954 vfprintf(stderr, msg_format, ap);
3955 fprintf(stderr, "\n");
3959 * Read errors are reported with an console message in TShark.
3962 read_failure_message(const char *filename, int err)
3964 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3965 filename, g_strerror(err));
3969 * Write errors are reported with an console message in TShark.
3972 write_failure_message(const char *filename, int err)
3974 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3975 filename, g_strerror(err));
3979 * Report an error in command-line arguments.
3982 cmdarg_err(const char *fmt, ...)
3987 failure_message(fmt, ap);
3992 * Report additional information for an error in command-line arguments.
3995 cmdarg_err_cont(const char *fmt, ...)
4000 vfprintf(stderr, fmt, ap);
4001 fprintf(stderr, "\n");
4007 * Editor modelines - http://www.wireshark.org/tools/modelines.html
4012 * indent-tabs-mode: nil
4015 * vi: set shiftwidth=2 tabstop=8 expandtab:
4016 * :indentSize=2:tabSize=8:noTabs=true: