3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
65 #include <epan/epan.h>
66 #include <epan/filesystem.h>
67 #include <wsutil/privileges.h>
70 #include <epan/timestamp.h>
71 #include <epan/packet.h>
73 #include "disabled_protos.h"
74 #include <epan/prefs.h>
75 #include <epan/column.h>
77 #include <epan/addr_resolv.h>
79 #include "clopts_common.h"
80 #include "cmdarg_err.h"
81 #include "version_info.h"
82 #include <epan/plugins.h>
84 #include <epan/epan_dissect.h>
86 #include <epan/stat_cmd_args.h>
87 #include <epan/timestamp.h>
88 #include <epan/ex-opt.h>
91 #include "capture_ui_utils.h"
92 #include "capture-pcap-util.h"
94 #include "capture-wpcap.h"
95 #include "capture_errs.h"
97 #include "capture_sync.h"
98 #endif /* HAVE_LIBPCAP */
100 #include <epan/funnel.h>
104 * This is the template for the decode as option; it is shared between the
105 * various functions that output the usage for this parameter.
107 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
109 static guint32 cum_bytes;
110 static nstime_t first_ts;
111 static nstime_t prev_dis_ts;
112 static nstime_t prev_cap_ts;
114 static gboolean print_packet_info; /* TRUE if we're to print packet information */
116 static gboolean perform_two_pass_analysis;
119 * The way the packet decode is to be written.
122 WRITE_TEXT, /* summary or detail text */
123 WRITE_XML, /* PDML or PSML */
124 WRITE_FIELDS /* User defined list of fields */
125 /* Add CSV and the like here */
128 static output_action_e output_action;
129 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
130 static gboolean verbose;
131 static gboolean print_hex;
132 static gboolean line_buffered;
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;
140 * Standard secondary message for unexpected errors.
142 static const char please_report[] =
143 "Please report this to the Wireshark developers";
147 * TRUE if we're to print packet counts to keep track of captured packets.
149 static gboolean print_packet_counts;
152 static capture_options global_capture_opts;
155 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
156 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
159 static int capture(void);
160 static void report_counts(void);
162 static BOOL WINAPI capture_cleanup(DWORD);
164 static void capture_cleanup(int);
166 static void report_counts_siginfo(int);
169 #endif /* HAVE_LIBPCAP */
171 static int load_cap_file(capture_file *, char *, int, int, gint64);
172 static gboolean process_packet(capture_file *cf, gint64 offset,
173 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
174 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
175 static void show_capture_file_io_error(const char *, int, gboolean);
176 static void show_print_file_io_error(int err);
177 static gboolean write_preamble(capture_file *cf);
178 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
179 static gboolean write_finale(void);
180 static const char *cf_open_error_message(int err, gchar *err_info,
181 gboolean for_writing, int file_type);
183 static void open_failure_message(const char *filename, int err,
184 gboolean for_writing);
185 static void failure_message(const char *msg_format, va_list ap);
186 static void read_failure_message(const char *filename, int err);
187 static void write_failure_message(const char *filename, int err);
192 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
194 g_assert_not_reached();
197 static void list_capture_types(void) {
200 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
201 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
202 if (wtap_dump_can_open(i))
203 fprintf(stderr, " %s - %s\n",
204 wtap_file_type_short_string(i), wtap_file_type_string(i));
209 print_usage(gboolean print_ver)
216 "TShark " VERSION "%s\n"
217 "Dump and analyze network traffic.\n"
218 "See http://www.wireshark.org for more information.\n"
221 wireshark_svnversion, get_copyright_info());
225 fprintf(output, "\n");
226 fprintf(output, "Usage: tshark [options] ...\n");
227 fprintf(output, "\n");
230 fprintf(output, "Capture interface:\n");
231 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
232 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
233 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
234 fprintf(output, " -p don't capture in promiscuous mode\n");
235 #ifdef HAVE_PCAP_CREATE
236 fprintf(output, " -I capture in monitor mode, if available\n");
238 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
239 fprintf(output, " -B <buffer size> size of kernel buffer (def: platform-dependent)\n");
241 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
242 fprintf(output, " -D print list of interfaces and exit\n");
243 fprintf(output, " -L print list of link-layer types of iface and exit\n");
244 fprintf(output, "\n");
245 fprintf(output, "Capture stop conditions:\n");
246 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
247 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
248 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
249 fprintf(output, " files:NUM - stop after NUM files\n");
250 /*fprintf(output, "\n");*/
251 fprintf(output, "Capture output:\n");
252 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
253 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
254 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
255 #endif /* HAVE_LIBPCAP */
257 /*fprintf(output, "\n");*/
258 fprintf(output, "Input file:\n");
259 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
261 fprintf(output, "\n");
262 fprintf(output, "Processing:\n");
263 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
264 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
265 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
266 fprintf(output, " -d %s ...\n", decode_as_arg_template);
267 fprintf(output, " \"Decode As\", see the man page for details\n");
268 fprintf(output, " Example: tcp.port==8888,http\n");
270 /*fprintf(output, "\n");*/
271 fprintf(output, "Output:\n");
272 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
273 fprintf(output, " (or to the standard output for \"-\")\n");
274 fprintf(output, " -C <config profile> start with specified configuration profile\n");
275 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
276 fprintf(output, " an empty \"-F\" option will list the file types\n");
277 fprintf(output, " -V add output of packet tree (Packet Details)\n");
278 fprintf(output, " -S display packets even when writing to a file\n");
279 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
280 fprintf(output, " -T pdml|ps|psml|text|fields\n");
281 fprintf(output, " format of text output (def: text)\n");
282 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
283 fprintf(output, " this option can be repeated to print multiple fields\n");
284 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
285 fprintf(output, " header=y|n switch headers on and off\n");
286 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
287 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
288 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
289 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
290 fprintf(output, " -l flush standard output after each packet\n");
291 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
292 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
293 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
295 fprintf(output, "\n");
296 fprintf(output, "Miscellaneous:\n");
297 fprintf(output, " -h display this help and exit\n");
298 fprintf(output, " -v display version info and exit\n");
299 fprintf(output, " -o <name>:<value> ... override preference setting\n");
300 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
304 * For a dissector table, print on the stream described by output,
305 * its short name (which is what's used in the "-d" option) and its
309 display_dissector_table_names(const char *table_name, const char *ui_name,
312 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
316 * For a dissector handle, print on the stream described by output,
317 * the filter name (which is what's used in the "-d" option) and the full
318 * name for the protocol that corresponds to this handle.
321 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
324 const gchar* proto_filter_name;
325 const gchar* proto_ui_name;
327 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
329 if (proto_id != -1) {
330 proto_filter_name = proto_get_protocol_filter_name(proto_id);
331 proto_ui_name = proto_get_protocol_name(proto_id);
332 g_assert(proto_filter_name != NULL);
333 g_assert(proto_ui_name != NULL);
335 fprintf((FILE *)output, "\t%s (%s)\n",
342 * The protocol_name_search structure is used by find_protocol_name_func()
343 * to pass parameters and store results
345 struct protocol_name_search{
346 gchar *searched_name; /* Protocol filter name we are looking for */
347 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
348 guint nb_match; /* How many dissectors matched searched_name */
350 typedef struct protocol_name_search *protocol_name_search_t;
353 * This function parses all dissectors associated with a table to find the
354 * one whose protocol has the specified filter name. It is called
355 * as a reference function in a call to dissector_table_foreach_handle.
356 * The name we are looking for, as well as the results, are stored in the
357 * protocol_name_search struct pointed to by user_data.
358 * If called using dissector_table_foreach_handle, we actually parse the
359 * whole list of dissectors.
362 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
366 const gchar *protocol_filter_name;
367 protocol_name_search_t search_info;
371 search_info = (protocol_name_search_t)user_data;
373 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
374 if (proto_id != -1) {
375 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
376 g_assert(protocol_filter_name != NULL);
377 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
379 if (search_info->nb_match == 0) {
380 /* Record this handle only if this is the first match */
381 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
383 search_info->nb_match++;
389 * Print all layer type names supported.
390 * We send the output to the stream described by the handle output.
394 fprint_all_layer_types(FILE *output)
397 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
401 * Print all protocol names supported for a specific layer type.
402 * table_name contains the layer type name in which the search is performed.
403 * We send the output to the stream described by the handle output.
407 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
410 dissector_table_foreach_handle(table_name,
411 display_dissector_names,
416 * The function below parses the command-line parameters for the decode as
417 * feature (a string pointer by cl_param).
418 * It checks the format of the command-line, searches for a matching table
419 * and dissector. If a table/dissector match is not found, we display a
420 * summary of the available tables/dissectors (on stderr) and return FALSE.
421 * If everything is fine, we get the "Decode as" preference activated,
422 * then we return TRUE.
425 add_decode_as(const gchar *cl_param)
429 gchar *decoded_param;
430 gchar *remaining_param;
432 gchar *dissector_str;
433 dissector_handle_t dissector_matching;
434 dissector_table_t table_matching;
435 ftenum_t dissector_table_selector_type;
436 struct protocol_name_search user_protocol_name;
438 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
441 decoded_param = g_strdup(cl_param);
442 g_assert(decoded_param);
445 /* The lines below will parse this string (modifying it) to extract all
446 necessary information. Note that decoded_param is still needed since
447 strings are not copied - we just save pointers. */
449 /* This section extracts a layer type (table_name) from decoded_param */
450 table_name = decoded_param; /* Layer type string starts from beginning */
452 remaining_param = strchr(table_name, '=');
453 if (remaining_param == NULL) {
454 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
455 /* If the argument does not follow the template, carry on anyway to check
456 if the table name is at least correct. If remaining_param is NULL,
457 we'll exit anyway further down */
460 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
463 /* Remove leading and trailing spaces from the table name */
464 while ( table_name[0] == ' ' )
466 while ( table_name[strlen(table_name) - 1] == ' ' )
467 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
469 /* The following part searches a table matching with the layer type specified */
470 table_matching = NULL;
472 /* Look for the requested table */
473 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
474 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
477 table_matching = find_dissector_table(table_name);
478 if (!table_matching) {
479 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
483 if (!table_matching) {
484 /* Display a list of supported layer types to help the user, if the
485 specified layer type was not found */
486 cmdarg_err("Valid layer types are:");
487 fprint_all_layer_types(stderr);
489 if (remaining_param == NULL || !table_matching) {
490 /* Exit if the layer type was not found, or if no '=' separator was found
492 g_free(decoded_param);
496 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
497 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
500 remaining_param++; /* Move to the second '=' */
501 *remaining_param = '\0'; /* Remove the second '=' */
503 remaining_param++; /* Position after the layer type string */
505 /* This section extracts a selector value (selector_str) from decoded_param */
507 selector_str = remaining_param; /* Next part starts with the selector number */
509 remaining_param = strchr(selector_str, ',');
510 if (remaining_param == NULL) {
511 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
512 /* If the argument does not follow the template, carry on anyway to check
513 if the selector value is at least correct. If remaining_param is NULL,
514 we'll exit anyway further down */
517 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
520 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
522 switch (dissector_table_selector_type) {
528 /* The selector for this table is an unsigned number. Parse it as such.
529 There's no need to remove leading and trailing spaces from the
530 selector number string, because sscanf will do that for us. */
531 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
532 cmdarg_err("Invalid selector number \"%s\"", selector_str);
533 g_free(decoded_param);
541 /* The selector for this table is a string. */
545 /* There are currently no dissector tables with any types other
546 than the ones listed above. */
547 g_assert_not_reached();
550 if (remaining_param == NULL) {
551 /* Exit if no ',' separator was found (see above) */
552 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
553 fprint_all_protocols_for_layer_types(stderr, table_name);
554 g_free(decoded_param);
558 remaining_param++; /* Position after the selector number string */
560 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
562 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
564 /* Remove leading and trailing spaces from the dissector name */
565 while ( dissector_str[0] == ' ' )
567 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
568 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
570 dissector_matching = NULL;
572 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
573 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 */
574 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
577 user_protocol_name.nb_match = 0;
578 user_protocol_name.searched_name = dissector_str;
579 user_protocol_name.matched_handle = NULL;
581 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 */
583 if (user_protocol_name.nb_match != 0) {
584 dissector_matching = user_protocol_name.matched_handle;
585 if (user_protocol_name.nb_match > 1) {
586 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
590 /* OK, check whether the problem is that there isn't any such
591 protocol, or that there is but it's not specified as a protocol
592 that's valid for that dissector table.
593 Note, we don't exit here, but dissector_matching will remain NULL,
595 if (proto_get_id_by_filter_name(dissector_str) == -1) {
596 /* No such protocol */
597 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
599 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
600 dissector_str, table_name);
605 if (!dissector_matching) {
606 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
607 fprint_all_protocols_for_layer_types(stderr, table_name);
608 g_free(decoded_param);
612 /* This is the end of the code that parses the command-line options.
613 All information is now stored in the variables:
617 The above variables that are strings are still pointing to areas within
618 decoded_parm. decoded_parm thus still needs to be kept allocated in
619 until we stop needing these variables
620 decoded_param will be deallocated at each exit point of this function */
623 /* We now have a pointer to the handle for the requested dissector
624 (requested protocol) inside the variable dissector_matching */
625 switch (dissector_table_selector_type) {
631 /* The selector for this table is an unsigned number. */
632 dissector_change(table_name, selector, dissector_matching);
638 /* The selector for this table is a string. */
639 dissector_change_string(table_name, selector_str, dissector_matching);
643 /* There are currently no dissector tables with any types other
644 than the ones listed above. */
645 g_assert_not_reached();
647 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
652 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
653 const gchar *message, gpointer user_data)
655 /* ignore log message, if log_level isn't interesting based
656 upon the console log preferences.
657 If the preferences haven't been loaded loaded yet, display the
660 The default console_log_level preference value is such that only
661 ERROR, CRITICAL and WARNING level messages are processed;
662 MESSAGE, INFO and DEBUG level messages are ignored.
664 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
665 ERROR and CRITICAL level messages so the current code is a behavioral
666 change. The current behavior is the same as in Wireshark.
668 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
669 prefs.console_log_level != 0) {
673 g_log_default_handler(log_domain, log_level, message, user_data);
678 output_file_description(const char *fname)
680 char *save_file_string;
682 /* Get a string that describes what we're writing to */
683 if (strcmp(fname, "-") == 0) {
684 /* We're writing to the standard output */
685 save_file_string = g_strdup("standard output");
687 /* We're writing to a file with the name in save_file */
688 save_file_string = g_strdup_printf("file \"%s\"", fname);
690 return save_file_string;
694 print_current_user(void) {
695 gchar *cur_user, *cur_group;
696 if (started_with_special_privs()) {
697 cur_user = get_cur_username();
698 cur_group = get_cur_groupname();
699 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
700 cur_user, cur_group);
703 if (running_with_special_privs()) {
704 fprintf(stderr, " This could be dangerous.");
706 fprintf(stderr, "\n");
711 check_capture_privs(void) {
714 /* Warn the user if npf.sys isn't loaded. */
715 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
716 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
717 "capturing or\nlisting interfaces.\n");
723 show_version(GString *comp_info_str, GString *runtime_info_str)
725 printf("TShark " VERSION "%s\n"
732 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
733 runtime_info_str->str);
737 main(int argc, char *argv[])
739 char *init_progfile_dir_error;
741 gboolean arg_error = FALSE;
747 char *gpf_path, *pf_path;
748 char *gdp_path, *dp_path;
749 int gpf_open_errno, gpf_read_errno;
750 int pf_open_errno, pf_read_errno;
751 int gdp_open_errno, gdp_read_errno;
752 int dp_open_errno, dp_read_errno;
755 gboolean list_link_layer_types = FALSE;
756 gboolean start_capture = FALSE;
759 gboolean capture_option_specified = FALSE;
761 gboolean quiet = FALSE;
762 int out_file_type = WTAP_FILE_PCAP;
763 gchar *cf_name = NULL, *rfilter = NULL;
764 #ifdef HAVE_PCAP_OPEN_DEAD
765 struct bpf_program fcode;
767 dfilter_t *rfcode = NULL;
770 GLogLevelFlags log_flags;
774 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
775 #define OPTSTRING_B "B:"
777 #define OPTSTRING_B ""
778 #endif /* _WIN32 or HAVE_PCAP_CREATE */
779 #else /* HAVE_LIBPCAP */
780 #define OPTSTRING_B ""
781 #endif /* HAVE_LIBPCAP */
783 #ifdef HAVE_PCAP_CREATE
784 #define OPTSTRING_I "I"
786 #define OPTSTRING_I ""
789 #define OPTSTRING "a:b:" OPTSTRING_B "c:C:d:De:E:f:F:G:hi:" OPTSTRING_I "K:lLnN:o:pPqr:R:s:St:T:u:vVw:xX:y:z:"
791 static const char optstring[] = OPTSTRING;
794 * Get credential information for later use.
796 get_credential_info();
799 * Attempt to get the pathname of the executable file.
801 init_progfile_dir_error = init_progfile_dir(argv[0], main);
802 if (init_progfile_dir_error != NULL) {
803 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
804 init_progfile_dir_error);
808 * In order to have the -X opts assigned before the wslua machine starts
809 * we need to call getopts before epan_init() gets called.
812 optind_initial = optind;
814 while ((opt = getopt(argc, argv, optstring)) != -1) {
816 case 'C': /* Configuration Profile */
817 if (profile_exists (optarg)) {
818 set_profile_name (optarg);
820 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
832 optind = optind_initial;
837 /** Send All g_log messages to our own handler **/
841 G_LOG_LEVEL_CRITICAL|
846 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
848 g_log_set_handler(NULL,
850 tshark_log_handler, NULL /* user_data */);
851 g_log_set_handler(LOG_DOMAIN_MAIN,
853 tshark_log_handler, NULL /* user_data */);
856 g_log_set_handler(LOG_DOMAIN_CAPTURE,
858 tshark_log_handler, NULL /* user_data */);
859 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
861 tshark_log_handler, NULL /* user_data */);
864 initialize_funnel_ops();
867 capture_opts_init(&global_capture_opts, &cfile);
870 timestamp_set_type(TS_RELATIVE);
871 timestamp_set_precision(TS_PREC_AUTO);
872 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
874 /* Register all dissectors; we must do this before checking for the
875 "-G" flag, as the "-G" flag dumps information registered by the
876 dissectors, and we must do it before we read the preferences, in
877 case any dissectors register preferences. */
878 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
879 failure_message, open_failure_message, read_failure_message,
880 write_failure_message);
882 /* Register all tap listeners; we do this before we parse the arguments,
883 as the "-z" argument can specify a registered tap. */
885 /* we register the plugin taps before the other taps because
886 stats_tree taps plugins will be registered as tap listeners
887 by stats_tree_stat.c and need to registered before that */
889 register_all_plugin_tap_listeners();
891 register_all_tap_listeners();
893 /* Now register the preferences for any non-dissector modules.
894 We must do that before we read the preferences as well. */
895 prefs_register_modules();
897 /* If invoked with the "-G" flag, we dump out information based on
898 the argument to the "-G" flag; if no argument is specified,
899 for backwards compatibility we dump out a glossary of display
902 XXX - we do this here, for now, to support "-G" with no arguments.
903 If none of our build or other processes uses "-G" with no arguments,
904 we can just process it with the other arguments. */
905 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
906 proto_initialize_all_prefixes();
909 proto_registrar_dump_fields(1);
911 if (strcmp(argv[2], "fields") == 0)
912 proto_registrar_dump_fields(1);
913 else if (strcmp(argv[2], "fields2") == 0)
914 proto_registrar_dump_fields(2);
915 else if (strcmp(argv[2], "fields3") == 0)
916 proto_registrar_dump_fields(3);
917 else if (strcmp(argv[2], "protocols") == 0)
918 proto_registrar_dump_protocols();
919 else if (strcmp(argv[2], "values") == 0)
920 proto_registrar_dump_values();
921 else if (strcmp(argv[2], "decodes") == 0)
922 dissector_dump_decodes();
923 else if (strcmp(argv[2], "defaultprefs") == 0)
925 else if (strcmp(argv[2], "currentprefs") == 0) {
926 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
927 &pf_open_errno, &pf_read_errno, &pf_path);
930 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
937 /* Set the C-language locale to the native environment. */
938 setlocale(LC_ALL, "");
940 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
941 &pf_open_errno, &pf_read_errno, &pf_path);
942 if (gpf_path != NULL) {
943 if (gpf_open_errno != 0) {
944 cmdarg_err("Can't open global preferences file \"%s\": %s.",
945 pf_path, strerror(gpf_open_errno));
947 if (gpf_read_errno != 0) {
948 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
949 pf_path, strerror(gpf_read_errno));
952 if (pf_path != NULL) {
953 if (pf_open_errno != 0) {
954 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
955 strerror(pf_open_errno));
957 if (pf_read_errno != 0) {
958 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
959 pf_path, strerror(pf_read_errno));
965 /* Set the name resolution code's flags from the preferences. */
966 g_resolv_flags = prefs_p->name_resolve;
968 /* Read the disabled protocols file. */
969 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
970 &dp_path, &dp_open_errno, &dp_read_errno);
971 if (gdp_path != NULL) {
972 if (gdp_open_errno != 0) {
973 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
974 gdp_path, strerror(gdp_open_errno));
976 if (gdp_read_errno != 0) {
977 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
978 gdp_path, strerror(gdp_read_errno));
982 if (dp_path != NULL) {
983 if (dp_open_errno != 0) {
985 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
986 strerror(dp_open_errno));
988 if (dp_read_errno != 0) {
990 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
991 strerror(dp_read_errno));
996 check_capture_privs();
998 cap_file_init(&cfile);
1000 /* Print format defaults to this. */
1001 print_format = PR_FMT_TEXT;
1003 output_fields = output_fields_new();
1005 /* Now get our args */
1006 while ((opt = getopt(argc, argv, optstring)) != -1) {
1008 case 'a': /* autostop criteria */
1009 case 'b': /* Ringbuffer option */
1010 case 'c': /* Capture x packets */
1011 case 'f': /* capture filter */
1012 case 'i': /* Use interface x */
1013 case 'p': /* Don't capture in promiscuous mode */
1014 #ifdef HAVE_PCAP_CREATE
1015 case 'I': /* Capture in monitor mode, if available */
1017 case 's': /* Set the snapshot (capture) length */
1018 case 'w': /* Write to capture file x */
1019 case 'y': /* Set the pcap data link type */
1020 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1021 case 'B': /* Buffer size */
1022 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1024 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1029 capture_option_specified = TRUE;
1034 /* Configuration profile settings were already processed just ignore them this time*/
1036 case 'd': /* Decode as rule */
1037 if (!add_decode_as(optarg))
1040 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1041 case 'K': /* Kerberos keytab file */
1042 read_keytab_file(optarg);
1045 case 'D': /* Print a list of capture devices and exit */
1047 status = capture_opts_list_interfaces(FALSE);
1050 capture_option_specified = TRUE;
1056 output_fields_add(output_fields, optarg);
1060 if(!output_fields_set_option(output_fields, optarg)) {
1061 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1062 output_fields_list_options(stderr);
1067 out_file_type = wtap_short_string_to_file_type(optarg);
1068 if (out_file_type < 0) {
1069 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1070 list_capture_types();
1074 case 'h': /* Print help and exit */
1078 case 'l': /* "Line-buffer" standard output */
1079 /* This isn't line-buffering, strictly speaking, it's just
1080 flushing the standard output after the information for
1081 each packet is printed; however, that should be good
1082 enough for all the purposes to which "-l" is put (and
1083 is probably actually better for "-V", as it does fewer
1086 See the comment in "process_packet()" for an explanation of
1087 why we do that, and why we don't just use "setvbuf()" to
1088 make the standard output line-buffered (short version: in
1089 Windows, "line-buffered" is the same as "fully-buffered",
1090 and the output buffer is only flushed when it fills up). */
1091 line_buffered = TRUE;
1093 case 'L': /* Print list of link-layer types and exit */
1095 list_link_layer_types = TRUE;
1097 capture_option_specified = TRUE;
1101 #if GLIB_CHECK_VERSION(2,10,0)
1102 case 'P': /* Perform two pass analysis */
1103 perform_two_pass_analysis = TRUE;
1106 case 'n': /* No name resolution */
1107 g_resolv_flags = RESOLV_NONE;
1109 case 'N': /* Select what types of addresses/port #s to resolve */
1110 if (g_resolv_flags == RESOLV_ALL)
1111 g_resolv_flags = RESOLV_NONE;
1112 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1113 if (badopt != '\0') {
1114 cmdarg_err("-N specifies unknown resolving option '%c';",
1116 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1120 case 'o': /* Override preference from command line */
1121 switch (prefs_set_pref(optarg)) {
1126 case PREFS_SET_SYNTAX_ERR:
1127 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1131 case PREFS_SET_NO_SUCH_PREF:
1132 case PREFS_SET_OBSOLETE:
1133 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1138 case 'q': /* Quiet */
1141 case 'r': /* Read capture file x */
1142 cf_name = g_strdup(optarg);
1144 case 'R': /* Read file filter */
1147 case 'S': /* show packets in real time */
1148 print_packet_info = TRUE;
1150 case 't': /* Time stamp type */
1151 if (strcmp(optarg, "r") == 0)
1152 timestamp_set_type(TS_RELATIVE);
1153 else if (strcmp(optarg, "a") == 0)
1154 timestamp_set_type(TS_ABSOLUTE);
1155 else if (strcmp(optarg, "ad") == 0)
1156 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1157 else if (strcmp(optarg, "d") == 0)
1158 timestamp_set_type(TS_DELTA);
1159 else if (strcmp(optarg, "dd") == 0)
1160 timestamp_set_type(TS_DELTA_DIS);
1161 else if (strcmp(optarg, "e") == 0)
1162 timestamp_set_type(TS_EPOCH);
1164 cmdarg_err("Invalid time stamp type \"%s\"",
1166 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1167 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1171 case 'T': /* printing Type */
1172 if (strcmp(optarg, "text") == 0) {
1173 output_action = WRITE_TEXT;
1174 print_format = PR_FMT_TEXT;
1175 } else if (strcmp(optarg, "ps") == 0) {
1176 output_action = WRITE_TEXT;
1177 print_format = PR_FMT_PS;
1178 } else if (strcmp(optarg, "pdml") == 0) {
1179 output_action = WRITE_XML;
1181 } else if (strcmp(optarg, "psml") == 0) {
1182 output_action = WRITE_XML;
1184 } else if(strcmp(optarg, "fields") == 0) {
1185 output_action = WRITE_FIELDS;
1186 verbose = TRUE; /* Need full tree info */
1188 cmdarg_err("Invalid -T parameter.");
1189 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1193 case 'u': /* Seconds type */
1194 if (strcmp(optarg, "s") == 0)
1195 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1196 else if (strcmp(optarg, "hms") == 0)
1197 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1199 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1200 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1204 case 'v': /* Show version and exit */
1206 GString *comp_info_str;
1207 GString *runtime_info_str;
1208 /* Assemble the compile-time version information string */
1209 comp_info_str = g_string_new("Compiled ");
1210 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1212 /* Assemble the run-time version information string */
1213 runtime_info_str = g_string_new("Running ");
1214 get_runtime_version_info(runtime_info_str, NULL);
1215 show_version(comp_info_str, runtime_info_str);
1216 g_string_free(comp_info_str, TRUE);
1217 g_string_free(runtime_info_str, TRUE);
1221 case 'V': /* Verbose */
1223 /* The user asked for a verbose output, so let's ensure they get it,
1224 * even if they're writing to a file.
1226 print_packet_info = TRUE;
1228 case 'x': /* Print packet data in hex (and ASCII) */
1230 /* The user asked for hex output, so let's ensure they get it,
1231 * even if they're writing to a file.
1233 print_packet_info = TRUE;
1238 /* We won't call the init function for the stat this soon
1239 as it would disallow MATE's fields (which are registered
1240 by the preferences set callback) from being used as
1241 part of a tap filter. Instead, we just add the argument
1242 to a list of stat arguments. */
1243 if (!process_stat_cmd_arg(optarg)) {
1244 cmdarg_err("invalid -z argument.");
1245 cmdarg_err_cont(" -z argument must be one of :");
1246 list_stat_cmd_args();
1251 case '?': /* Bad flag - print usage message */
1254 list_capture_types();
1264 /* If we specified output fields, but not the output field type... */
1265 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1266 cmdarg_err("Output fields were specified with \"-e\", "
1267 "but \"-Tfields\" was not specified.");
1269 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1270 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1271 "specified with \"-e\".");
1276 /* If no capture filter or read filter has been specified, and there are
1277 still command-line arguments, treat them as the tokens of a capture
1278 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1279 flag was specified. */
1280 if (optind < argc) {
1281 if (cf_name != NULL) {
1282 if (rfilter != NULL) {
1283 cmdarg_err("Read filters were specified both with \"-R\" "
1284 "and with additional command-line arguments");
1287 rfilter = get_args_as_string(argc, argv, optind);
1290 if (global_capture_opts.has_cfilter) {
1291 cmdarg_err("Capture filters were specified both with \"-f\""
1292 " and with additional command-line arguments");
1295 global_capture_opts.has_cfilter = TRUE;
1296 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1298 capture_option_specified = TRUE;
1304 if (!global_capture_opts.saving_to_file) {
1305 /* We're not saving the capture to a file; if "-q" wasn't specified,
1306 we should print packet information */
1308 print_packet_info = TRUE;
1310 /* We're saving to a file; if we're writing to the standard output.
1311 and we'll also be writing dissected packets to the standard
1312 output, reject the request. At best, we could redirect that
1313 to the standard error; we *can't* write both to the standard
1314 output and have either of them be useful. */
1315 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1316 cmdarg_err("You can't write both raw packet data and dissected packets"
1317 " to the standard output.");
1322 /* We're not saving the capture to a file; if "-q" wasn't specified,
1323 we should print packet information */
1325 print_packet_info = TRUE;
1328 #ifndef HAVE_LIBPCAP
1329 if (capture_option_specified)
1330 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1337 /* We don't support capture filters when reading from a capture file
1338 (the BPF compiler doesn't support all link-layer types that we
1339 support in capture files we read). */
1341 if (cf_name != NULL) {
1342 if (global_capture_opts.has_cfilter) {
1343 cmdarg_err("Only read filters, not capture filters, "
1344 "can be specified when reading a capture file.");
1351 if (output_action != WRITE_TEXT) {
1352 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1358 if (list_link_layer_types) {
1359 /* We're supposed to list the link-layer types for an interface;
1360 did the user also specify a capture file to be read? */
1362 /* Yes - that's bogus. */
1363 cmdarg_err("You can't specify -L and a capture file to be read.");
1366 /* No - did they specify a ring buffer option? */
1367 if (global_capture_opts.multi_files_on) {
1368 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1374 * "-r" was specified, so we're reading a capture file.
1375 * Capture options don't apply here.
1377 if (global_capture_opts.multi_files_on) {
1378 cmdarg_err("Multiple capture files requested, but "
1379 "a capture isn't being done.");
1382 if (global_capture_opts.has_file_duration) {
1383 cmdarg_err("Switching capture files after a time interval was specified, but "
1384 "a capture isn't being done.");
1387 if (global_capture_opts.has_ring_num_files) {
1388 cmdarg_err("A ring buffer of capture files was specified, but "
1389 "a capture isn't being done.");
1392 if (global_capture_opts.has_autostop_files) {
1393 cmdarg_err("A maximum number of capture files was specified, but "
1394 "a capture isn't being done.");
1398 /* Note: TShark now allows the restriction of a _read_ file by packet count
1399 * and byte count as well as a write file. Other autostop options remain valid
1400 * only for a write file.
1402 if (global_capture_opts.has_autostop_duration) {
1403 cmdarg_err("A maximum capture time was specified, but "
1404 "a capture isn't being done.");
1409 * "-r" wasn't specified, so we're doing a live capture.
1411 if (global_capture_opts.saving_to_file) {
1412 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1414 /* When capturing, we only support writing libpcap format. */
1415 if (out_file_type != WTAP_FILE_PCAP) {
1416 cmdarg_err("Live captures can only be saved in libpcap format.");
1419 if (global_capture_opts.multi_files_on) {
1420 /* Multiple-file mode doesn't work under certain conditions:
1421 a) it doesn't work if you're writing to the standard output;
1422 b) it doesn't work if you're writing to a pipe;
1424 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1425 cmdarg_err("Multiple capture files requested, but "
1426 "the capture is being written to the standard output.");
1429 if (global_capture_opts.output_to_pipe) {
1430 cmdarg_err("Multiple capture files requested, but "
1431 "the capture file is a pipe.");
1434 if (!global_capture_opts.has_autostop_filesize &&
1435 !global_capture_opts.has_file_duration) {
1436 cmdarg_err("Multiple capture files requested, but "
1437 "no maximum capture file size or duration was specified.");
1442 /* They didn't specify a "-w" flag, so we won't be saving to a
1443 capture file. Check for options that only make sense if
1444 we're saving to a file. */
1445 if (global_capture_opts.has_autostop_filesize) {
1446 cmdarg_err("Maximum capture file size specified, but "
1447 "capture isn't being saved to a file.");
1450 if (global_capture_opts.multi_files_on) {
1451 cmdarg_err("Multiple capture files requested, but "
1452 "the capture isn't being saved to a file.");
1461 /* Start windows sockets */
1462 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1465 /* Notify all registered modules that have had any of their preferences
1466 changed either from one of the preferences file or from the command
1467 line that their preferences have changed. */
1470 /* At this point MATE will have registered its field array so we can
1471 have a tap filter with one of MATE's late-registered fields as part
1472 of the filter. We can now process all the "-z" arguments. */
1473 start_requested_stats();
1475 /* disabled protocols as per configuration file */
1476 if (gdp_path == NULL && dp_path == NULL) {
1477 set_disabled_protos_list();
1480 /* Build the column format array */
1481 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1484 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1485 capture_opts_trim_ring_num_files(&global_capture_opts);
1488 if (rfilter != NULL) {
1489 if (!dfilter_compile(rfilter, &rfcode)) {
1490 cmdarg_err("%s", dfilter_error_msg);
1492 #ifdef HAVE_PCAP_OPEN_DEAD
1496 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1498 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1500 " Note: That display filter code looks like a valid capture filter;");
1502 " maybe you mixed them up?");
1511 cfile.rfcode = rfcode;
1513 if (print_packet_info) {
1514 /* If we're printing as text or PostScript, we have
1515 to create a print stream. */
1516 if (output_action == WRITE_TEXT) {
1517 switch (print_format) {
1520 print_stream = print_stream_text_stdio_new(stdout);
1524 print_stream = print_stream_ps_stdio_new(stdout);
1528 g_assert_not_reached();
1533 /* We have to dissect each packet if:
1535 we're printing information about each packet;
1537 we're using a read filter on the packets;
1539 we're using any taps. */
1540 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1544 * We're reading a capture file.
1548 * Immediately relinquish any special privileges we have; we must not
1549 * be allowed to read any capture files the user running TShark
1552 relinquish_special_privs_perm();
1553 print_current_user();
1555 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1560 /* Set timestamp precision; there should arguably be a command-line
1561 option to let the user set this. */
1562 switch(wtap_file_tsprecision(cfile.wth)) {
1563 case(WTAP_FILE_TSPREC_SEC):
1564 timestamp_set_precision(TS_PREC_AUTO_SEC);
1566 case(WTAP_FILE_TSPREC_DSEC):
1567 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1569 case(WTAP_FILE_TSPREC_CSEC):
1570 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1572 case(WTAP_FILE_TSPREC_MSEC):
1573 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1575 case(WTAP_FILE_TSPREC_USEC):
1576 timestamp_set_precision(TS_PREC_AUTO_USEC);
1578 case(WTAP_FILE_TSPREC_NSEC):
1579 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1582 g_assert_not_reached();
1585 /* Process the packets in the file */
1587 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1588 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1589 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1591 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1598 /* No capture file specified, so we're supposed to do a live capture
1599 (or get a list of link-layer types for a live capture device);
1600 do we have support for live captures? */
1607 cmdarg_err("WinPcap couldn't be found.");
1608 detailed_err = cant_load_winpcap_err("TShark");
1609 cmdarg_err_cont("%s", detailed_err);
1610 g_free(detailed_err);
1615 /* trim the interface name and exit if that failed */
1616 if (!capture_opts_trim_iface(&global_capture_opts,
1617 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1621 /* if requested, list the link layer types and exit */
1622 if (list_link_layer_types) {
1623 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1627 if (print_packet_info) {
1628 if (!write_preamble(NULL)) {
1630 show_print_file_io_error(err);
1633 } else if (!quiet) {
1635 * We're not printing information for each packet, and the user
1636 * didn't ask us not to print a count of packets as they arrive,
1637 * so print that count so the user knows that packets are arriving.
1639 * XXX - what if the user wants to do a live capture, doesn't want
1640 * to save it to a file, doesn't want information printed for each
1641 * packet, does want some "-z" statistic, and wants packet counts
1642 * so they know whether they're seeing any packets?
1644 print_packet_counts = TRUE;
1647 /* For now, assume libpcap gives microsecond precision. */
1648 timestamp_set_precision(TS_PREC_AUTO_USEC);
1652 if (print_packet_info) {
1653 if (!write_finale()) {
1655 show_print_file_io_error(err);
1659 /* No - complain. */
1660 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1667 #if GLIB_CHECK_VERSION(2,10,0)
1668 if (cfile.plist_start != NULL)
1669 g_slice_free_chain(frame_data, cfile.plist_start, next);
1672 draw_tap_listeners(TRUE);
1673 funnel_dump_all_text_windows();
1676 output_fields_free(output_fields);
1677 output_fields = NULL;
1682 /*#define USE_BROKEN_G_MAIN_LOOP*/
1684 #ifdef USE_BROKEN_G_MAIN_LOOP
1687 gboolean loop_running = FALSE;
1689 guint32 packet_count = 0;
1692 /* XXX - move to the right position / file */
1693 /* read from a pipe (callback) */
1694 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1696 typedef struct pipe_input_tag {
1700 pipe_input_cb_t input_cb;
1701 guint pipe_input_id;
1703 GStaticMutex callback_running;
1707 static pipe_input_t pipe_input;
1710 /* The timer has expired, see if there's stuff to read from the pipe,
1711 if so, do the callback */
1713 pipe_timer_cb(gpointer data)
1717 gboolean result, result1;
1719 pipe_input_t *pipe_input = data;
1720 gint iterations = 0;
1723 g_static_mutex_lock (&pipe_input->callback_running);
1725 /* try to read data from the pipe only 5 times, to avoid blocking */
1726 while(iterations < 5) {
1727 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1729 /* Oddly enough although Named pipes don't work on win9x,
1730 PeekNamedPipe does !!! */
1731 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1732 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1734 /* Get the child process exit status */
1735 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1738 /* If the Peek returned an error, or there are bytes to be read
1739 or the childwatcher thread has terminated then call the normal
1741 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1743 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1745 /* And call the real handler */
1746 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1747 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1748 /* pipe closed, return false so that the timer is stopped */
1749 g_static_mutex_unlock (&pipe_input->callback_running);
1754 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1755 /* No data, stop now */
1762 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1764 g_static_mutex_unlock (&pipe_input->callback_running);
1766 /* we didn't stopped the timer, so let it run */
1773 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1776 pipe_input.source = source;
1777 pipe_input.child_process = child_process;
1778 pipe_input.user_data = user_data;
1779 pipe_input.input_cb = input_cb;
1782 g_static_mutex_init(&pipe_input.callback_running);
1783 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1784 do this but that doesn't cover all win32 platforms. GTK can do
1785 this but doesn't seem to work over processes. Attempt to do
1786 something similar here, start a timer and check for data on every
1788 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1789 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1799 #ifdef USE_TSHARK_SELECT
1803 struct sigaction action, oldaction;
1807 * XXX - dropping privileges is still required, until code cleanup is done
1809 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1810 * when it's done, we don't need special privileges to run tshark at all,
1811 * therefore we don't need to drop these privileges
1812 * The only thing we might want to keep is a warning if tshark is run as root,
1813 * as it's no longer necessary and potentially dangerous.
1815 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1816 * We've opened the capture device, so we shouldn't need any special
1817 * privileges any more; relinquish those privileges.
1819 * XXX - if we have saved set-user-ID support, we should give up those
1820 * privileges immediately, and then reclaim them long enough to get
1821 * a list of network interfaces and to open one, and then give them
1822 * up again, so that stuff we do while processing the argument list,
1823 * reading the user's preferences, loading and starting plugins
1824 * (especially *user* plugins), etc. is done with the user's privileges,
1825 * not special privileges.
1827 relinquish_special_privs_perm();
1828 print_current_user();
1830 /* Cleanup all data structures used for dissection. */
1831 cleanup_dissection();
1832 /* Initialize all data structures used for dissection. */
1836 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1837 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1839 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1841 action.sa_handler = capture_cleanup;
1842 action.sa_flags = 0;
1843 sigemptyset(&action.sa_mask);
1844 sigaction(SIGTERM, &action, NULL);
1845 sigaction(SIGINT, &action, NULL);
1846 sigaction(SIGHUP, NULL, &oldaction);
1847 if (oldaction.sa_handler == SIG_DFL)
1848 sigaction(SIGHUP, &action, NULL);
1851 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1852 quiet mode, report the number of packets we've captured. */
1853 action.sa_handler = report_counts_siginfo;
1854 action.sa_flags = 0;
1855 sigemptyset(&action.sa_mask);
1856 sigaction(SIGINFO, &action, NULL);
1857 #endif /* SIGINFO */
1860 global_capture_opts.state = CAPTURE_PREPARING;
1862 /* Let the user know what interface was chosen. */
1863 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1864 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1866 ret = sync_pipe_start(&global_capture_opts);
1871 /* the actual capture loop
1873 * XXX - glib doesn't seem to provide any event based loop handling.
1875 * XXX - for whatever reason,
1876 * calling g_main_loop_new() ends up in 100% cpu load.
1878 * But that doesn't matter: in UNIX we can use select() to find an input
1879 * source with something to do.
1881 * But that doesn't matter because we're in a CLI (that doesn't need to
1882 * update a GUI or something at the same time) so it's OK if we block
1883 * trying to read from the pipe.
1885 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1886 * wrong (but I leave it there in case I am...).
1889 #ifdef USE_TSHARK_SELECT
1891 FD_SET(pipe_input.source, &readfds);
1894 loop_running = TRUE;
1896 while (loop_running)
1898 #ifdef USE_TSHARK_SELECT
1899 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1905 } else if (ret == 1) {
1907 /* Call the real handler */
1908 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1909 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1912 #ifdef USE_TSHARK_SELECT
1921 /* XXX - move the call to main_window_update() out of capture_sync.c */
1922 /* dummy for capture_sync.c to make linker happy */
1923 void main_window_update(void)
1927 /* capture child detected an error */
1929 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1931 cmdarg_err("%s", error_msg);
1932 cmdarg_err_cont("%s", secondary_error_msg);
1936 /* capture child detected an capture filter related error */
1938 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1940 dfilter_t *rfcode = NULL;
1943 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1945 "Invalid capture filter: \"%s\"!\n"
1947 "That string looks like a valid display filter; however, it isn't a valid\n"
1948 "capture filter (%s).\n"
1950 "Note that display filters and capture filters don't have the same syntax,\n"
1951 "so you can't use most display filter expressions as capture filters.\n"
1953 "See the User's Guide for a description of the capture filter syntax.",
1954 capture_opts->cfilter, error_message);
1955 dfilter_free(rfcode);
1958 "Invalid capture filter: \"%s\"!\n"
1960 "That string isn't a valid capture filter (%s).\n"
1961 "See the User's Guide for a description of the capture filter syntax.",
1962 capture_opts->cfilter, error_message);
1967 /* capture child tells us we have a new (or the first) capture file */
1969 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1971 gboolean is_tempfile;
1975 if(capture_opts->state == CAPTURE_PREPARING) {
1976 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1978 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1980 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1982 /* free the old filename */
1983 if (capture_opts->save_file != NULL) {
1985 /* we start a new capture file, close the old one (if we had one before) */
1986 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1987 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1988 wtap_close(((capture_file *) capture_opts->cf)->wth);
1990 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1993 g_free(capture_opts->save_file);
1994 is_tempfile = FALSE;
1996 /* we didn't had a save_file before, must be a tempfile */
2000 /* save the new filename */
2001 capture_opts->save_file = g_strdup(new_file);
2003 /* if we are in real-time mode, open the new file now */
2005 /* Attempt to open the capture file and set up to read from it. */
2006 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2010 /* Don't unlink (delete) the save file - leave it around,
2011 for debugging purposes. */
2012 g_free(capture_opts->save_file);
2013 capture_opts->save_file = NULL;
2018 capture_opts->state = CAPTURE_RUNNING;
2024 /* capture child tells us we have new packets to read */
2026 capture_input_new_packets(capture_options *capture_opts, int to_read)
2032 capture_file *cf = capture_opts->cf;
2033 gboolean filtering_tap_listeners;
2038 * Prevent a SIGINFO handler from writing to stdout while we're
2039 * doing so; instead, have it just set a flag telling us to print
2040 * that information when we're done.
2043 #endif /* SIGINFO */
2045 /* Do we have any tap listeners with filters? */
2046 filtering_tap_listeners = have_filtering_tap_listeners();
2048 /* Get the union of the flags for all tap listeners. */
2049 tap_flags = union_of_tap_listener_flags();
2052 while (to_read-- && cf->wth) {
2053 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2055 /* read from file failed, tell the capture child to stop */
2056 sync_pipe_stop(capture_opts);
2057 wtap_close(cf->wth);
2060 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2061 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2062 filtering_tap_listeners, tap_flags);
2065 /* packet sucessfully read and gone through the "Read Filter" */
2071 * Dumpcap's doing all the work; we're not doing any dissection.
2072 * Count all the packets it wrote.
2074 packet_count += to_read;
2077 if (print_packet_counts) {
2078 /* We're printing packet counts. */
2079 if (packet_count != 0) {
2080 fprintf(stderr, "\r%u ", packet_count);
2081 /* stderr could be line buffered */
2088 * Allow SIGINFO handlers to write.
2093 * If a SIGINFO handler asked us to write out capture counts, do so.
2097 #endif /* SIGINFO */
2103 if (!print_packet_counts) {
2104 /* Report the count only if we aren't printing a packet count
2105 as packets arrive. */
2106 fprintf(stderr, "%u packet%s captured\n", packet_count,
2107 plurality(packet_count, "", "s"));
2110 infoprint = FALSE; /* we just reported it */
2111 #endif /* SIGINFO */
2116 report_counts_siginfo(int signum _U_)
2118 int sav_errno = errno;
2119 /* If we've been told to delay printing, just set a flag asking
2120 that we print counts (if we're supposed to), otherwise print
2121 the count of packets captured (if we're supposed to). */
2128 #endif /* SIGINFO */
2131 /* capture child detected any packet drops? */
2133 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2135 if (print_packet_counts) {
2136 /* We're printing packet counts to stderr.
2137 Send a newline so that we move to the line after the packet count. */
2138 fprintf(stderr, "\n");
2142 /* We're printing packet counts to stderr.
2143 Send a newline so that we move to the line after the packet count. */
2144 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2149 /* capture child closed its side of the pipe, do the required cleanup */
2151 capture_input_closed(capture_options *capture_opts)
2155 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2156 wtap_close(((capture_file *) capture_opts->cf)->wth);
2158 #ifdef USE_BROKEN_G_MAIN_LOOP
2159 /*g_main_loop_quit(loop);*/
2162 loop_running = FALSE;
2171 capture_cleanup(DWORD ctrltype _U_)
2173 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2174 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2175 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2176 like SIGTERM at least when the machine's shutting down.
2178 For now, we handle them all as indications that we should clean up
2179 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2182 However, as handlers run in a new thread, we can't just longjmp
2183 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2184 no other handler - such as one that would terminate the process -
2187 XXX - for some reason, typing ^C to TShark, if you run this in
2188 a Cygwin console window in at least some versions of Cygwin,
2189 causes TShark to terminate immediately; this routine gets
2190 called, but the main loop doesn't get a chance to run and
2191 exit cleanly, at least if this is compiled with Microsoft Visual
2192 C++ (i.e., it's a property of the Cygwin console window or Bash;
2193 it happens if TShark is not built with Cygwin - for all I know,
2194 building it with Cygwin may make the problem go away). */
2196 /* tell the capture child to stop */
2197 sync_pipe_stop(&global_capture_opts);
2199 /* don't stop our own loop already here, otherwise status messages and
2200 * cleanup wouldn't be done properly. The child will indicate the stop of
2201 * everything by calling capture_input_closed() later */
2207 capture_cleanup(int signum _U_)
2209 /* tell the capture child to stop */
2210 sync_pipe_stop(&global_capture_opts);
2213 #endif /* HAVE_LIBPCAP */
2215 #if GLIB_CHECK_VERSION(2,10,0)
2217 process_packet_first_pass(capture_file *cf,
2218 gint64 offset, const struct wtap_pkthdr *whdr,
2219 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2221 frame_data *fdata = g_slice_new(frame_data);
2225 /* Count this packet. */
2228 /* If we're not running a display filter and we're not printing any
2229 packet information, we don't need to do a dissection. This means
2230 that all packets can be marked as 'passed'. */
2233 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2235 /* If we're going to print packet information, or we're going to
2236 run a read filter, or we're going to process taps, set up to
2237 do a dissection and do so. */
2238 if (do_dissection) {
2240 /* Grab any resolved addresses */
2241 host_name_lookup_process(NULL);
2243 /* The protocol tree will be "visible", i.e., printed, only if we're
2244 printing packet details, which is true if we're printing stuff
2245 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2247 epan_dissect_init(&edt, FALSE, FALSE);
2249 /* If we're running a read filter, prime the epan_dissect_t with that
2252 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2254 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2255 &first_ts, &prev_dis_ts, &prev_cap_ts);
2257 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2259 /* Run the read filter if we have one. */
2261 passed = dfilter_apply_edt(cf->rfcode, &edt);
2265 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2266 cap_file_add_fdata(cf, fdata);
2269 g_slice_free(frame_data, fdata);
2272 epan_dissect_cleanup(&edt);
2278 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2279 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2280 gboolean filtering_tap_listeners, guint tap_flags)
2282 gboolean create_proto_tree;
2287 /* If we're not running a display filter and we're not printing any
2288 packet information, we don't need to do a dissection. This means
2289 that all packets can be marked as 'passed'. */
2292 /* If we're going to print packet information, or we're going to
2293 run a read filter, or we're going to process taps, set up to
2294 do a dissection and do so. */
2295 if (do_dissection) {
2297 /* Grab any resolved addresses */
2298 host_name_lookup_process(NULL);
2300 if (cf->rfcode || verbose || filtering_tap_listeners ||
2301 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2302 create_proto_tree = TRUE;
2304 create_proto_tree = FALSE;
2306 /* The protocol tree will be "visible", i.e., printed, only if we're
2307 printing packet details, which is true if we're printing stuff
2308 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2310 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2312 /* If we're running a read filter, prime the epan_dissect_t with that
2315 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2317 col_custom_prime_edt(&edt, &cf->cinfo);
2319 tap_queue_init(&edt);
2321 /* We only need the columns if either
2323 1) some tap needs the columns
2327 2) we're printing packet info but we're *not* verbose; in verbose
2328 mode, we print the protocol tree, not the protocol summary. */
2329 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2334 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2336 tap_push_tapped_queue(&edt);
2338 /* Run the read filter if we have one. */
2340 passed = dfilter_apply_edt(cf->rfcode, &edt);
2344 /* Process this packet. */
2345 if (print_packet_info) {
2346 /* We're printing packet information; print the information for
2349 print_packet(cf, &edt);
2351 print_packet(cf, NULL);
2353 /* The ANSI C standard does not appear to *require* that a line-buffered
2354 stream be flushed to the host environment whenever a newline is
2355 written, it just says that, on such a stream, characters "are
2356 intended to be transmitted to or from the host environment as a
2357 block when a new-line character is encountered".
2359 The Visual C++ 6.0 C implementation doesn't do what is intended;
2360 even if you set a stream to be line-buffered, it still doesn't
2361 flush the buffer at the end of every line.
2363 So, if the "-l" flag was specified, we flush the standard output
2364 at the end of a packet. This will do the right thing if we're
2365 printing packet summary lines, and, as we print the entire protocol
2366 tree for a single packet without waiting for anything to happen,
2367 it should be as good as line-buffered mode if we're printing
2368 protocol trees. (The whole reason for the "-l" flag in either
2369 tcpdump or TShark is to allow the output of a live capture to
2370 be piped to a program or script and to have that script see the
2371 information for the packet as soon as it's printed, rather than
2372 having to wait until a standard I/O buffer fills up. */
2376 if (ferror(stdout)) {
2377 show_print_file_io_error(errno);
2383 if (do_dissection) {
2384 epan_dissect_cleanup(&edt);
2391 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2392 int max_packet_count, gint64 max_byte_count)
2395 int snapshot_length;
2400 char *save_file_string = NULL;
2401 gboolean filtering_tap_listeners;
2404 linktype = wtap_file_encap(cf->wth);
2405 if (save_file != NULL) {
2406 /* Get a string that describes what we're writing to */
2407 save_file_string = output_file_description(save_file);
2409 /* Set up to write to the capture file. */
2410 snapshot_length = wtap_snapshot_length(cf->wth);
2411 if (snapshot_length == 0) {
2412 /* Snapshot length of input file not known. */
2413 snapshot_length = WTAP_MAX_PACKET_SIZE;
2415 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2416 FALSE /* compressed */, &err);
2419 /* We couldn't set up to write to the capture file. */
2422 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2423 cmdarg_err("Capture files can't be written in that format.");
2426 case WTAP_ERR_UNSUPPORTED_ENCAP:
2427 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2428 cmdarg_err("The capture file being read can't be written in "
2432 case WTAP_ERR_CANT_OPEN:
2433 cmdarg_err("The %s couldn't be created for some "
2434 "unknown reason.", save_file_string);
2437 case WTAP_ERR_SHORT_WRITE:
2438 cmdarg_err("A full header couldn't be written to the %s.",
2443 cmdarg_err("The %s could not be created: %s.", save_file_string,
2444 wtap_strerror(err));
2450 if (print_packet_info) {
2451 if (!write_preamble(cf)) {
2453 show_print_file_io_error(err);
2460 /* Do we have any tap listeners with filters? */
2461 filtering_tap_listeners = have_filtering_tap_listeners();
2463 /* Get the union of the flags for all tap listeners. */
2464 tap_flags = union_of_tap_listener_flags();
2466 if (perform_two_pass_analysis) {
2467 #if GLIB_CHECK_VERSION(2,10,0)
2469 int old_max_packet_count = max_packet_count;
2471 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2472 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2473 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2474 /* Stop reading if we have the maximum number of packets;
2475 * When the -c option has not been used, max_packet_count
2476 * starts at 0, which practically means, never stop reading.
2477 * (unless we roll over max_packet_count ?)
2479 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2480 err = 0; /* This is not an error */
2486 /* Close the sequential I/O side, to free up memory it requires. */
2487 wtap_sequential_close(cf->wth);
2489 /* Allow the protocol dissectors to free up memory that they
2490 * don't need after the sequential run-through of the packets. */
2491 postseq_cleanup_all_protocols();
2493 max_packet_count = old_max_packet_count;
2495 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2496 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2497 cf->pd, fdata->cap_len, &err, &err_info)) {
2498 if (process_packet_second_pass(cf, fdata,
2499 &cf->pseudo_header, cf->pd,
2500 filtering_tap_listeners, tap_flags)) {
2501 /* Either there's no read filtering or this packet passed the
2502 filter, so, if we're writing to a capture file, write
2505 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2506 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2508 /* Error writing to a capture file */
2509 show_capture_file_io_error(save_file, err, FALSE);
2510 wtap_dump_close(pdh, &err);
2514 /* Stop reading if we have the maximum number of packets;
2515 * When the -c option has not been used, max_packet_count
2516 * starts at 0, which practically means, never stop reading.
2517 * (unless we roll over max_packet_count ?)
2519 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2520 err = 0; /* This is not an error */
2529 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2530 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2531 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2532 filtering_tap_listeners, tap_flags)) {
2533 /* Either there's no read filtering or this packet passed the
2534 filter, so, if we're writing to a capture file, write
2537 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2538 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2540 /* Error writing to a capture file */
2541 show_capture_file_io_error(save_file, err, FALSE);
2542 wtap_dump_close(pdh, &err);
2546 /* Stop reading if we have the maximum number of packets;
2547 * When the -c option has not been used, max_packet_count
2548 * starts at 0, which practically means, never stop reading.
2549 * (unless we roll over max_packet_count ?)
2551 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2552 err = 0; /* This is not an error */
2560 /* Print a message noting that the read failed somewhere along the line. */
2563 case WTAP_ERR_UNSUPPORTED_ENCAP:
2564 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2565 cf->filename, err_info);
2569 case WTAP_ERR_CANT_READ:
2570 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2574 case WTAP_ERR_SHORT_READ:
2575 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2579 case WTAP_ERR_BAD_RECORD:
2580 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2581 cf->filename, err_info);
2586 cmdarg_err("An error occurred while reading \"%s\": %s.",
2587 cf->filename, wtap_strerror(err));
2590 if (save_file != NULL) {
2591 /* Now close the capture file. */
2592 if (!wtap_dump_close(pdh, &err))
2593 show_capture_file_io_error(save_file, err, TRUE);
2596 if (save_file != NULL) {
2597 /* Now close the capture file. */
2598 if (!wtap_dump_close(pdh, &err))
2599 show_capture_file_io_error(save_file, err, TRUE);
2601 if (print_packet_info) {
2602 if (!write_finale()) {
2604 show_print_file_io_error(err);
2611 wtap_close(cf->wth);
2614 g_free(save_file_string);
2620 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2621 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2622 gboolean filtering_tap_listeners, guint tap_flags)
2625 gboolean create_proto_tree;
2630 /* Count this packet. */
2633 /* If we're not running a display filter and we're not printing any
2634 packet information, we don't need to do a dissection. This means
2635 that all packets can be marked as 'passed'. */
2638 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2640 /* If we're going to print packet information, or we're going to
2641 run a read filter, or we're going to process taps, set up to
2642 do a dissection and do so. */
2643 if (do_dissection) {
2644 if (print_packet_info && g_resolv_flags)
2645 /* Grab any resolved addresses */
2646 host_name_lookup_process(NULL);
2648 if (cf->rfcode || verbose || filtering_tap_listeners ||
2649 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2650 create_proto_tree = TRUE;
2652 create_proto_tree = FALSE;
2654 /* The protocol tree will be "visible", i.e., printed, only if we're
2655 printing packet details, which is true if we're printing stuff
2656 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2658 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2660 /* If we're running a read filter, prime the epan_dissect_t with that
2663 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2665 col_custom_prime_edt(&edt, &cf->cinfo);
2667 tap_queue_init(&edt);
2669 /* We only need the columns if either
2671 1) some tap needs the columns
2675 2) we're printing packet info but we're *not* verbose; in verbose
2676 mode, we print the protocol tree, not the protocol summary. */
2677 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2682 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2683 &first_ts, &prev_dis_ts, &prev_cap_ts);
2685 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2687 tap_push_tapped_queue(&edt);
2689 /* Run the read filter if we have one. */
2691 passed = dfilter_apply_edt(cf->rfcode, &edt);
2695 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2697 /* Process this packet. */
2698 if (print_packet_info) {
2699 /* We're printing packet information; print the information for
2702 print_packet(cf, &edt);
2704 print_packet(cf, NULL);
2706 /* The ANSI C standard does not appear to *require* that a line-buffered
2707 stream be flushed to the host environment whenever a newline is
2708 written, it just says that, on such a stream, characters "are
2709 intended to be transmitted to or from the host environment as a
2710 block when a new-line character is encountered".
2712 The Visual C++ 6.0 C implementation doesn't do what is intended;
2713 even if you set a stream to be line-buffered, it still doesn't
2714 flush the buffer at the end of every line.
2716 So, if the "-l" flag was specified, we flush the standard output
2717 at the end of a packet. This will do the right thing if we're
2718 printing packet summary lines, and, as we print the entire protocol
2719 tree for a single packet without waiting for anything to happen,
2720 it should be as good as line-buffered mode if we're printing
2721 protocol trees. (The whole reason for the "-l" flag in either
2722 tcpdump or TShark is to allow the output of a live capture to
2723 be piped to a program or script and to have that script see the
2724 information for the packet as soon as it's printed, rather than
2725 having to wait until a standard I/O buffer fills up. */
2729 if (ferror(stdout)) {
2730 show_print_file_io_error(errno);
2736 if (do_dissection) {
2737 epan_dissect_cleanup(&edt);
2738 frame_data_cleanup(&fdata);
2744 write_preamble(capture_file *cf)
2746 switch (output_action) {
2749 return print_preamble(print_stream, cf ? cf->filename : NULL);
2753 write_pdml_preamble(stdout);
2755 write_psml_preamble(stdout);
2756 return !ferror(stdout);
2759 write_fields_preamble(output_fields, stdout);
2760 return !ferror(stdout);
2763 g_assert_not_reached();
2769 get_line_buf(size_t len)
2771 static char *line_bufp = NULL;
2772 static size_t line_buf_len = 256;
2773 size_t new_line_buf_len;
2775 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2776 new_line_buf_len *= 2)
2778 if (line_bufp == NULL) {
2779 line_buf_len = new_line_buf_len;
2780 line_bufp = g_malloc(line_buf_len + 1);
2782 if (new_line_buf_len > line_buf_len) {
2783 line_buf_len = new_line_buf_len;
2784 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2791 print_columns(capture_file *cf)
2798 line_bufp = get_line_buf(256);
2801 for (i = 0; i < cf->cinfo.num_cols; i++) {
2802 switch (cf->cinfo.col_fmt[i]) {
2806 * Don't print this if we're doing a live capture from a network
2807 * interface - if we're doing a live capture, you won't be
2808 * able to look at the capture in the future (it's not being
2809 * saved anywhere), so the frame numbers are unlikely to be
2812 * (XXX - it might be nice to be able to save and print at
2813 * the same time, sort of like an "Update list of packets
2814 * in real time" capture in Wireshark.)
2816 if (global_capture_opts.iface != NULL)
2819 column_len = strlen(cf->cinfo.col_data[i]);
2822 line_bufp = get_line_buf(buf_offset + column_len);
2823 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2829 case COL_ABS_DATE_TIME: /* XXX - wider */
2830 column_len = strlen(cf->cinfo.col_data[i]);
2831 if (column_len < 10)
2833 line_bufp = get_line_buf(buf_offset + column_len);
2834 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2840 case COL_DEF_DL_SRC:
2841 case COL_RES_DL_SRC:
2842 case COL_UNRES_DL_SRC:
2843 case COL_DEF_NET_SRC:
2844 case COL_RES_NET_SRC:
2845 case COL_UNRES_NET_SRC:
2846 column_len = strlen(cf->cinfo.col_data[i]);
2847 if (column_len < 12)
2849 line_bufp = get_line_buf(buf_offset + column_len);
2850 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2856 case COL_DEF_DL_DST:
2857 case COL_RES_DL_DST:
2858 case COL_UNRES_DL_DST:
2859 case COL_DEF_NET_DST:
2860 case COL_RES_NET_DST:
2861 case COL_UNRES_NET_DST:
2862 column_len = strlen(cf->cinfo.col_data[i]);
2863 if (column_len < 12)
2865 line_bufp = get_line_buf(buf_offset + column_len);
2866 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2870 column_len = strlen(cf->cinfo.col_data[i]);
2871 line_bufp = get_line_buf(buf_offset + column_len);
2872 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2875 buf_offset += column_len;
2876 if (i != cf->cinfo.num_cols - 1) {
2878 * This isn't the last column, so we need to print a
2879 * separator between this column and the next.
2881 * If we printed a network source and are printing a
2882 * network destination of the same type next, separate
2883 * them with "->"; if we printed a network destination
2884 * and are printing a network source of the same type
2885 * next, separate them with "<-"; otherwise separate them
2888 * We add enough space to the buffer for " <- " or " -> ",
2889 * even if we're only adding " ".
2891 line_bufp = get_line_buf(buf_offset + 4);
2892 switch (cf->cinfo.col_fmt[i]) {
2897 switch (cf->cinfo.col_fmt[i + 1]) {
2902 strcat(line_bufp + buf_offset, " -> ");
2907 strcat(line_bufp + buf_offset, " ");
2913 case COL_DEF_DL_SRC:
2914 case COL_RES_DL_SRC:
2915 case COL_UNRES_DL_SRC:
2916 switch (cf->cinfo.col_fmt[i + 1]) {
2918 case COL_DEF_DL_DST:
2919 case COL_RES_DL_DST:
2920 case COL_UNRES_DL_DST:
2921 strcat(line_bufp + buf_offset, " -> ");
2926 strcat(line_bufp + buf_offset, " ");
2932 case COL_DEF_NET_SRC:
2933 case COL_RES_NET_SRC:
2934 case COL_UNRES_NET_SRC:
2935 switch (cf->cinfo.col_fmt[i + 1]) {
2937 case COL_DEF_NET_DST:
2938 case COL_RES_NET_DST:
2939 case COL_UNRES_NET_DST:
2940 strcat(line_bufp + buf_offset, " -> ");
2945 strcat(line_bufp + buf_offset, " ");
2954 switch (cf->cinfo.col_fmt[i + 1]) {
2959 strcat(line_bufp + buf_offset, " <- ");
2964 strcat(line_bufp + buf_offset, " ");
2970 case COL_DEF_DL_DST:
2971 case COL_RES_DL_DST:
2972 case COL_UNRES_DL_DST:
2973 switch (cf->cinfo.col_fmt[i + 1]) {
2975 case COL_DEF_DL_SRC:
2976 case COL_RES_DL_SRC:
2977 case COL_UNRES_DL_SRC:
2978 strcat(line_bufp + buf_offset, " <- ");
2983 strcat(line_bufp + buf_offset, " ");
2989 case COL_DEF_NET_DST:
2990 case COL_RES_NET_DST:
2991 case COL_UNRES_NET_DST:
2992 switch (cf->cinfo.col_fmt[i + 1]) {
2994 case COL_DEF_NET_SRC:
2995 case COL_RES_NET_SRC:
2996 case COL_UNRES_NET_SRC:
2997 strcat(line_bufp + buf_offset, " <- ");
3002 strcat(line_bufp + buf_offset, " ");
3009 strcat(line_bufp + buf_offset, " ");
3015 return print_line(print_stream, 0, line_bufp);
3019 print_packet(capture_file *cf, epan_dissect_t *edt)
3021 print_args_t print_args;
3024 /* Print the information in the protocol tree. */
3025 switch (output_action) {
3028 print_args.to_file = TRUE;
3029 print_args.format = print_format;
3030 print_args.print_summary = !verbose;
3031 print_args.print_hex = verbose && print_hex;
3032 print_args.print_formfeed = FALSE;
3033 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3035 /* init the packet range */
3036 packet_range_init(&print_args.range);
3038 if (!proto_tree_print(&print_args, edt, print_stream))
3041 /* "print_hex_data()" will put out a leading blank line, as well
3042 as a trailing one; print one here, to separate the packets,
3043 only if "print_hex_data()" won't be called. */
3044 if (!print_line(print_stream, 0, ""))
3050 proto_tree_write_pdml(edt, stdout);
3052 return !ferror(stdout);
3054 proto_tree_write_fields(output_fields, edt, stdout);
3056 return !ferror(stdout);
3059 /* Just fill in the columns. */
3060 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3062 /* Now print them. */
3063 switch (output_action) {
3066 if (!print_columns(cf))
3071 proto_tree_write_psml(edt, stdout);
3072 return !ferror(stdout);
3073 case WRITE_FIELDS: /*No non-verbose "fields" format */
3074 g_assert_not_reached();
3079 if (!print_hex_data(print_stream, edt))
3081 if (!print_line(print_stream, 0, ""))
3090 switch (output_action) {
3093 return print_finale(print_stream);
3097 write_pdml_finale(stdout);
3099 write_psml_finale(stdout);
3100 return !ferror(stdout);
3103 write_fields_finale(output_fields, stdout);
3104 return !ferror(stdout);
3107 g_assert_not_reached();
3113 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3117 char err_msg[2048+1];
3119 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3123 /* The open succeeded. Fill in the information for this file. */
3125 /* Cleanup all data structures used for dissection. */
3126 cleanup_dissection();
3127 /* Initialize all data structures used for dissection. */
3131 cf->f_datalen = 0; /* not used, but set it anyway */
3133 /* Set the file name because we need it to set the follow stream filter.
3134 XXX - is that still true? We need it for other reasons, though,
3136 cf->filename = g_strdup(fname);
3138 /* Indicate whether it's a permanent or temporary file. */
3139 cf->is_tempfile = is_tempfile;
3141 /* If it's a temporary capture buffer file, mark it as not saved. */
3142 cf->user_saved = !is_tempfile;
3144 cf->cd_t = wtap_file_type(cf->wth);
3146 cf->drops_known = FALSE;
3148 cf->snap = wtap_snapshot_length(cf->wth);
3149 if (cf->snap == 0) {
3150 /* Snapshot length not known. */
3151 cf->has_snap = FALSE;
3152 cf->snap = WTAP_MAX_PACKET_SIZE;
3154 cf->has_snap = TRUE;
3155 nstime_set_zero(&cf->elapsed_time);
3156 nstime_set_unset(&first_ts);
3157 nstime_set_unset(&prev_dis_ts);
3158 nstime_set_unset(&prev_cap_ts);
3160 cf->state = FILE_READ_IN_PROGRESS;
3165 g_snprintf(err_msg, sizeof err_msg,
3166 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3167 cmdarg_err("%s", err_msg);
3172 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3174 char *save_file_string;
3176 save_file_string = output_file_description(fname);
3181 cmdarg_err("Not all the packets could be written to the %s because there is "
3182 "no space left on the file system.",
3188 cmdarg_err("Not all the packets could be written to the %s because you are "
3189 "too close to, or over your disk quota.",
3194 case WTAP_ERR_CANT_CLOSE:
3195 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3199 case WTAP_ERR_SHORT_WRITE:
3200 cmdarg_err("Not all the packets could be written to the %s.",
3206 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3207 wtap_strerror(err));
3209 cmdarg_err("An error occurred while writing to the %s: %s.",
3210 save_file_string, wtap_strerror(err));
3214 g_free(save_file_string);
3218 show_print_file_io_error(int err)
3223 cmdarg_err("Not all the packets could be printed because there is "
3224 "no space left on the file system.");
3229 cmdarg_err("Not all the packets could be printed because you are "
3230 "too close to, or over your disk quota.");
3235 cmdarg_err("An error occurred while printing packets: %s.",
3242 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3246 static char errmsg_errno[1024+1];
3249 /* Wiretap error. */
3252 case WTAP_ERR_NOT_REGULAR_FILE:
3253 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3256 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3257 /* Seen only when opening a capture file for reading. */
3258 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3261 case WTAP_ERR_UNSUPPORTED:
3262 /* Seen only when opening a capture file for reading. */
3263 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3264 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3267 errmsg = errmsg_errno;
3270 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3271 /* Seen only when opening a capture file for writing. */
3272 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3273 "The file \"%%s\" is a pipe, and %s capture files can't be "
3274 "written to a pipe.", wtap_file_type_string(file_type));
3275 errmsg = errmsg_errno;
3278 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3279 /* Seen only when opening a capture file for writing. */
3280 errmsg = "TShark doesn't support writing capture files in that format.";
3283 case WTAP_ERR_UNSUPPORTED_ENCAP:
3285 errmsg = "TShark can't save this capture in that format.";
3287 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3288 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3291 errmsg = errmsg_errno;
3295 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3297 errmsg = "TShark can't save this capture in that format.";
3299 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3302 case WTAP_ERR_BAD_RECORD:
3303 /* Seen only when opening a capture file for reading. */
3304 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3305 "The file \"%%s\" appears to be damaged or corrupt.\n"
3308 errmsg = errmsg_errno;
3311 case WTAP_ERR_CANT_OPEN:
3313 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3315 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3318 case WTAP_ERR_SHORT_READ:
3319 errmsg = "The file \"%s\" appears to have been cut short"
3320 " in the middle of a packet or other data.";
3323 case WTAP_ERR_SHORT_WRITE:
3324 errmsg = "A full header couldn't be written to the file \"%s\".";
3328 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3329 "The file \"%%s\" could not be %s: %s.",
3330 for_writing ? "created" : "opened",
3331 wtap_strerror(err));
3332 errmsg = errmsg_errno;
3336 errmsg = file_open_error_message(err, for_writing);
3341 * Open/create errors are reported with an console message in TShark.
3344 open_failure_message(const char *filename, int err, gboolean for_writing)
3346 fprintf(stderr, "tshark: ");
3347 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3348 fprintf(stderr, "\n");
3353 * General errors are reported with an console message in TShark.
3356 failure_message(const char *msg_format, va_list ap)
3358 fprintf(stderr, "tshark: ");
3359 vfprintf(stderr, msg_format, ap);
3360 fprintf(stderr, "\n");
3364 * Read errors are reported with an console message in TShark.
3367 read_failure_message(const char *filename, int err)
3369 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3370 filename, strerror(err));
3374 * Write errors are reported with an console message in TShark.
3377 write_failure_message(const char *filename, int err)
3379 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3380 filename, strerror(err));
3384 * Report an error in command-line arguments.
3387 cmdarg_err(const char *fmt, ...)
3392 failure_message(fmt, ap);
3397 * Report additional information for an error in command-line arguments.
3400 cmdarg_err_cont(const char *fmt, ...)
3405 vfprintf(stderr, fmt, ap);
3406 fprintf(stderr, "\n");