5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * Text-mode variant, by Gilbert Ramirez <gram@alumni.rice.edu>
10 * and Guy Harris <guy@alum.mit.edu>.
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
63 #include <epan/epan.h>
64 #include <epan/filesystem.h>
65 #include <epan/privileges.h>
66 #include <wiretap/file_util.h>
69 #include <epan/timestamp.h>
70 #include <epan/packet.h>
72 #include "disabled_protos.h"
73 #include <epan/prefs.h>
74 #include <epan/column.h>
76 #include <epan/addr_resolv.h>
78 #include "clopts_common.h"
79 #include "cmdarg_err.h"
80 #include "version_info.h"
81 #include <epan/conversation.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"
93 #include "capture-pcap-util.h"
95 #include "capture-wpcap.h"
96 #include "capture_errs.h"
98 #include "capture_sync.h"
99 #endif /* HAVE_LIBPCAP */
100 #include "epan/emem.h"
102 #include <epan/funnel.h>
106 * This is the template for the decode as option; it is shared between the
107 * various functions that output the usage for this parameter.
109 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
111 static nstime_t first_ts;
112 static nstime_t prev_dis_ts;
113 static nstime_t prev_cap_ts;
114 static GString *comp_info_str, *runtime_info_str;
116 static gboolean print_packet_info; /* TRUE if we're to print packet information */
118 * The way the packet decode is to be written.
121 WRITE_TEXT, /* summary or detail text */
122 WRITE_XML, /* PDML or PSML */
123 WRITE_FIELDS /* User defined list of fields */
124 /* Add CSV and the like here */
126 static output_action_e output_action;
127 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
128 static gboolean verbose;
129 static gboolean print_hex;
130 static gboolean line_buffered;
131 static guint32 cum_bytes = 0;
132 static print_format_e print_format = PR_FMT_TEXT;
133 static print_stream_t *print_stream;
135 static output_fields_t* output_fields = NULL;
138 * Standard secondary message for unexpected errors.
140 static const char please_report[] =
141 "Please report this to the Wireshark developers";
145 * TRUE if we're to print packet counts to keep track of captured packets.
147 static gboolean print_packet_counts;
150 static capture_options capture_opts;
153 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
154 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
157 static int capture(void);
158 static void report_counts(void);
160 static BOOL WINAPI capture_cleanup(DWORD);
162 static void capture_cleanup(int);
164 static void report_counts_siginfo(int);
167 #endif /* HAVE_LIBPCAP */
169 static int load_cap_file(capture_file *, char *, int, int, gint64);
170 static gboolean process_packet(capture_file *cf, gint64 offset,
171 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
173 static void show_capture_file_io_error(const char *, int, gboolean);
174 static void show_print_file_io_error(int err);
175 static gboolean write_preamble(capture_file *cf);
176 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
177 static gboolean write_finale(void);
178 static const char *cf_open_error_message(int err, gchar *err_info,
179 gboolean for_writing, int file_type);
181 static void open_failure_message(const char *filename, int err,
182 gboolean for_writing);
183 static void failure_message(const char *msg_format, va_list ap);
184 static void read_failure_message(const char *filename, int err);
189 static void list_capture_types(void) {
192 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
193 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
194 if (wtap_dump_can_open(i))
195 fprintf(stderr, " %s - %s\n",
196 wtap_file_type_short_string(i), wtap_file_type_string(i));
201 print_usage(gboolean print_ver)
208 "TShark " VERSION "%s\n"
209 "Dump and analyze network traffic.\n"
210 "See http://www.wireshark.org for more information.\n"
213 wireshark_svnversion, get_copyright_info());
217 fprintf(output, "\n");
218 fprintf(output, "Usage: tshark [options] ...\n");
219 fprintf(output, "\n");
222 fprintf(output, "Capture interface:\n");
223 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
224 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
225 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
226 fprintf(output, " -p don't capture in promiscuous mode\n");
228 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
230 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
231 fprintf(output, " -D print list of interfaces and exit\n");
232 fprintf(output, " -L print list of link-layer types of iface and exit\n");
233 fprintf(output, "\n");
234 fprintf(output, "Capture stop conditions:\n");
235 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
236 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
237 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
238 fprintf(output, " files:NUM - stop after NUM files\n");
239 /*fprintf(output, "\n");*/
240 fprintf(output, "Capture output:\n");
241 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
242 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
243 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
244 #endif /* HAVE_LIBPCAP */
246 /*fprintf(output, "\n");*/
247 fprintf(output, "Input file:\n");
248 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
250 fprintf(output, "\n");
251 fprintf(output, "Processing:\n");
252 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
253 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
254 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
255 fprintf(output, " -d %s ...\n", decode_as_arg_template);
256 fprintf(output, " \"Decode As\", see the man page for details\n");
257 fprintf(output, " Example: tcp.port==8888,http\n");
259 /*fprintf(output, "\n");*/
260 fprintf(output, "Output:\n");
261 fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\n");
262 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
263 fprintf(output, " an empty \"-F\" option will list the file types\n");
264 fprintf(output, " -V add output of packet tree (Packet Details)\n");
265 fprintf(output, " -S display packets even when writing to a file\n");
266 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
267 fprintf(output, " -T pdml|ps|psml|text|fields\n");
268 fprintf(output, " format of text output (def: text)\n");
269 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
270 fprintf(output, " this option can be repeated to print multiple fields\n");
271 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
272 fprintf(output, " header=y|n switch headers on and off\n");
273 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
274 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
275 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
276 fprintf(output, " -l flush standard output after each packet\n");
277 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
278 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
279 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
281 fprintf(output, "\n");
282 fprintf(output, "Miscellaneous:\n");
283 fprintf(output, " -h display this help and exit\n");
284 fprintf(output, " -v display version info and exit\n");
285 fprintf(output, " -o <name>:<value> ... override preference setting\n");
289 * For a dissector table, print on the stream described by output,
290 * its short name (which is what's used in the "-d" option) and its
294 display_dissector_table_names(const char *table_name, const char *ui_name,
297 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
301 * For a dissector handle, print on the stream described by output,
302 * the filter name (which is what's used in the "-d" option) and the full
303 * name for the protocol that corresponds to this handle.
306 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
309 const gchar* proto_filter_name;
310 const gchar* proto_ui_name;
312 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
314 if (proto_id != -1) {
315 proto_filter_name = proto_get_protocol_filter_name(proto_id);
316 proto_ui_name = proto_get_protocol_name(proto_id);
317 g_assert(proto_filter_name != NULL);
318 g_assert(proto_ui_name != NULL);
320 fprintf((FILE *)output, "\t%s (%s)\n",
327 * The protocol_name_search structure is used by find_protocol_name_func()
328 * to pass parameters and store results
330 struct protocol_name_search{
331 gchar *searched_name; /* Protocol filter name we are looking for */
332 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
333 guint nb_match; /* How many dissectors matched searched_name */
335 typedef struct protocol_name_search *protocol_name_search_t;
338 * This function parses all dissectors associated with a table to find the
339 * one whose protocol has the specified filter name. It is called
340 * as a reference function in a call to dissector_table_foreach_handle.
341 * The name we are looking for, as well as the results, are stored in the
342 * protocol_name_search struct pointed to by user_data.
343 * If called using dissector_table_foreach_handle, we actually parse the
344 * whole list of dissectors.
347 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
351 const gchar *protocol_filter_name;
352 protocol_name_search_t search_info;
356 search_info = (protocol_name_search_t)user_data;
358 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
359 if (proto_id != -1) {
360 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
361 g_assert(protocol_filter_name != NULL);
362 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
364 if (search_info->nb_match == 0) {
365 /* Record this handle only if this is the first match */
366 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
368 search_info->nb_match++;
374 * Print all layer type names supported.
375 * We send the output to the stream described by the handle output.
379 fprint_all_layer_types(FILE *output)
382 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
386 * Print all protocol names supported for a specific layer type.
387 * table_name contains the layer type name in which the search is performed.
388 * We send the output to the stream described by the handle output.
392 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
395 dissector_table_foreach_handle(table_name,
396 display_dissector_names,
401 * The function below parses the command-line parameters for the decode as
402 * feature (a string pointer by cl_param).
403 * It checks the format of the command-line, searches for a matching table
404 * and dissector. If a table/dissector match is not found, we display a
405 * summary of the available tables/dissectors (on stderr) and return FALSE.
406 * If everything is fine, we get the "Decode as" preference activated,
407 * then we return TRUE.
410 add_decode_as(const gchar *cl_param)
414 gchar *decoded_param;
415 gchar *remaining_param;
417 gchar *dissector_str;
418 dissector_handle_t dissector_matching;
419 dissector_table_t table_matching;
420 ftenum_t dissector_table_selector_type;
421 struct protocol_name_search user_protocol_name;
423 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
426 decoded_param = g_malloc( sizeof(gchar) * (strlen(cl_param) + 1) ); /* Allocate enough space to have a working copy of the command-line parameter */
427 g_assert(decoded_param);
428 strcpy(decoded_param, cl_param);
431 /* The lines below will parse this string (modifying it) to extract all
432 necessary information. Note that decoded_param is still needed since
433 strings are not copied - we just save pointers. */
435 /* This section extracts a layer type (table_name) from decoded_param */
436 table_name = decoded_param; /* Layer type string starts from beginning */
438 remaining_param = strchr(table_name, '=');
439 if (remaining_param == NULL) {
440 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
441 /* If the argument does not follow the template, carry on anyway to check
442 if the table name is at least correct. If remaining_param is NULL,
443 we'll exit anyway further down */
446 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
449 /* Remove leading and trailing spaces from the table name */
450 while ( table_name[0] == ' ' )
452 while ( table_name[strlen(table_name) - 1] == ' ' )
453 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
455 /* The following part searches a table matching with the layer type specified */
456 table_matching = NULL;
458 /* Look for the requested table */
459 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
460 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
463 table_matching = find_dissector_table(table_name);
464 if (!table_matching) {
465 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
469 if (!table_matching) {
470 /* Display a list of supported layer types to help the user, if the
471 specified layer type was not found */
472 cmdarg_err("Valid layer types are:");
473 fprint_all_layer_types(stderr);
475 if (remaining_param == NULL || !table_matching) {
476 /* Exit if the layer type was not found, or if no '=' separator was found
478 g_free(decoded_param);
482 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
483 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
486 remaining_param++; /* Move to the second '=' */
487 *remaining_param = '\0'; /* Remove the second '=' */
489 remaining_param++; /* Position after the layer type string */
491 /* This section extracts a selector value (selector_str) from decoded_param */
493 selector_str = remaining_param; /* Next part starts with the selector number */
495 remaining_param = strchr(selector_str, ',');
496 if (remaining_param == NULL) {
497 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
498 /* If the argument does not follow the template, carry on anyway to check
499 if the selector value is at least correct. If remaining_param is NULL,
500 we'll exit anyway further down */
503 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
506 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
508 switch (dissector_table_selector_type) {
514 /* The selector for this table is an unsigned number. Parse it as such.
515 There's no need to remove leading and trailing spaces from the
516 selector number string, because sscanf will do that for us. */
517 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
518 cmdarg_err("Invalid selector number \"%s\"", selector_str);
519 g_free(decoded_param);
526 /* The selector for this table is a string. */
530 /* There are currently no dissector tables with any types other
531 than the ones listed above. */
532 g_assert_not_reached();
535 if (remaining_param == NULL) {
536 /* Exit if no ',' separator was found (see above) */
537 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
538 fprint_all_protocols_for_layer_types(stderr, table_name);
539 g_free(decoded_param);
543 remaining_param++; /* Position after the selector number string */
545 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
547 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
549 /* Remove leading and trailing spaces from the dissector name */
550 while ( dissector_str[0] == ' ' )
552 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
553 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
555 dissector_matching = NULL;
557 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
558 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 */
559 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
562 user_protocol_name.nb_match = 0;
563 user_protocol_name.searched_name = dissector_str;
564 user_protocol_name.matched_handle = NULL;
566 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 */
568 if (user_protocol_name.nb_match != 0) {
569 dissector_matching = user_protocol_name.matched_handle;
570 if (user_protocol_name.nb_match > 1) {
571 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
575 /* OK, check whether the problem is that there isn't any such
576 protocol, or that there is but it's not specified as a protocol
577 that's valid for that dissector table.
578 Note, we don't exit here, but dissector_matching will remain NULL,
580 if (proto_get_id_by_filter_name(dissector_str) == -1) {
581 /* No such protocol */
582 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
584 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
585 dissector_str, table_name);
590 if (!dissector_matching) {
591 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
592 fprint_all_protocols_for_layer_types(stderr, table_name);
593 g_free(decoded_param);
597 /* This is the end of the code that parses the command-line options.
598 All information is now stored in the variables:
602 The above variables that are strings are still pointing to areas within
603 decoded_parm. decoded_parm thus still needs to be kept allocated in
604 until we stop needing these variables
605 decoded_param will be deallocated at each exit point of this function */
608 /* We now have a pointer to the handle for the requested dissector
609 (requested protocol) inside the variable dissector_matching */
610 switch (dissector_table_selector_type) {
616 /* The selector for this table is an unsigned number. */
617 dissector_change(table_name, selector, dissector_matching);
622 /* The selector for this table is a string. */
623 dissector_change_string(table_name, selector_str, dissector_matching);
627 /* There are currently no dissector tables with any types other
628 than the ones listed above. */
629 g_assert_not_reached();
631 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
636 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
637 const gchar *message _U_, gpointer user_data _U_)
642 output_file_description(const char *fname)
644 char *save_file_string;
646 /* Get a string that describes what we're writing to */
647 if (strcmp(fname, "-") == 0) {
648 /* We're writing to the standard output */
649 save_file_string = g_strdup("standard output");
651 /* We're writing to a file with the name in save_file */
652 save_file_string = g_strdup_printf("file \"%s\"", fname);
654 return save_file_string;
658 print_current_user() {
659 gchar *cur_user, *cur_group;
660 if (started_with_special_privs()) {
661 cur_user = get_cur_username();
662 cur_group = get_cur_groupname();
663 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
664 cur_user, cur_group);
667 if (running_with_special_privs()) {
668 fprintf(stderr, " This could be dangerous.");
670 fprintf(stderr, "\n");
675 check_capture_privs() {
678 /* Warn the user if npf.sys isn't loaded. */
679 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
680 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
681 "capturing or\nlisting interfaces.\n");
689 main(int argc, char *argv[])
691 char *init_progfile_dir_error;
694 gboolean arg_error = FALSE;
700 char *gpf_path, *pf_path;
701 char *gdp_path, *dp_path;
702 int gpf_open_errno, gpf_read_errno;
703 int pf_open_errno, pf_read_errno;
704 int gdp_open_errno, gdp_read_errno;
705 int dp_open_errno, dp_read_errno;
708 gboolean list_link_layer_types = FALSE;
709 gboolean start_capture = FALSE;
712 gboolean capture_option_specified = FALSE;
714 gboolean quiet = FALSE;
715 int out_file_type = WTAP_FILE_PCAP;
716 gchar *cf_name = NULL, *rfilter = NULL;
717 #ifdef HAVE_PCAP_OPEN_DEAD
718 struct bpf_program fcode;
720 dfilter_t *rfcode = NULL;
723 GLogLevelFlags log_flags;
726 #define OPTSTRING_INIT "a:b:c:d:De:E:f:F:G:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
729 #define OPTSTRING_WIN32 "B:"
731 #define OPTSTRING_WIN32 ""
734 #define OPTSTRING_WIN32 ""
735 #endif /* HAVE_LIBPCAP */
737 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
740 * Get credential information for later use.
742 get_credential_info();
745 * Attempt to get the pathname of the executable file.
747 init_progfile_dir_error = init_progfile_dir(argv[0]);
748 if (init_progfile_dir_error != NULL) {
749 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
750 init_progfile_dir_error);
754 * In order to have the -X opts assigned before the wslua machine starts
755 * we need to call getopts before epan_init() gets called.
758 optind_initial = optind;
760 while ((opt = getopt(argc, argv, optstring)) != -1) {
770 optind = optind_initial;
773 /* nothing more than the standard GLib handler, but without a warning */
780 g_log_set_handler(NULL,
782 log_func_ignore, NULL /* user_data */);
783 g_log_set_handler(LOG_DOMAIN_CAPTURE,
785 log_func_ignore, NULL /* user_data */);
787 initialize_funnel_ops();
790 capture_opts_init(&capture_opts, NULL /* cfile */);
793 timestamp_set_type(TS_RELATIVE);
794 timestamp_set_precision(TS_PREC_AUTO);
796 /* Register all dissectors; we must do this before checking for the
797 "-G" flag, as the "-G" flag dumps information registered by the
798 dissectors, and we must do it before we read the preferences, in
799 case any dissectors register preferences. */
800 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
801 failure_message, open_failure_message, read_failure_message);
803 /* Register all tap listeners; we do this before we parse the arguments,
804 as the "-z" argument can specify a registered tap. */
806 /* we register the plugin taps before the other taps because
807 stats_tree taps plugins will be registered as tap listeners
808 by stats_tree_stat.c and need to registered before that */
810 register_all_plugin_tap_listeners();
812 register_all_tap_listeners();
814 /* Now register the preferences for any non-dissector modules.
815 We must do that before we read the preferences as well. */
816 prefs_register_modules();
818 /* If invoked with the "-G" flag, we dump out information based on
819 the argument to the "-G" flag; if no argument is specified,
820 for backwards compatibility we dump out a glossary of display
823 XXX - we do this here, for now, to support "-G" with no arguments.
824 If none of our build or other processes uses "-G" with no arguments,
825 we can just process it with the other arguments. */
826 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
828 proto_registrar_dump_fields(1);
830 if (strcmp(argv[2], "fields") == 0)
831 proto_registrar_dump_fields(1);
832 else if (strcmp(argv[2], "fields2") == 0)
833 proto_registrar_dump_fields(2);
834 else if (strcmp(argv[2], "fields3") == 0)
835 proto_registrar_dump_fields(3);
836 else if (strcmp(argv[2], "protocols") == 0)
837 proto_registrar_dump_protocols();
838 else if (strcmp(argv[2], "values") == 0)
839 proto_registrar_dump_values();
840 else if (strcmp(argv[2], "decodes") == 0)
841 dissector_dump_decodes();
842 else if (strcmp(argv[2], "defaultprefs") == 0)
844 else if (strcmp(argv[2], "currentprefs") == 0) {
845 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
846 &pf_open_errno, &pf_read_errno, &pf_path);
849 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
856 /* Set the C-language locale to the native environment. */
857 setlocale(LC_ALL, "");
859 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
860 &pf_open_errno, &pf_read_errno, &pf_path);
861 if (gpf_path != NULL) {
862 if (gpf_open_errno != 0) {
863 cmdarg_err("Can't open global preferences file \"%s\": %s.",
864 pf_path, strerror(gpf_open_errno));
866 if (gpf_read_errno != 0) {
867 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
868 pf_path, strerror(gpf_read_errno));
871 if (pf_path != NULL) {
872 if (pf_open_errno != 0) {
873 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
874 strerror(pf_open_errno));
876 if (pf_read_errno != 0) {
877 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
878 pf_path, strerror(pf_read_errno));
884 /* Set the name resolution code's flags from the preferences. */
885 g_resolv_flags = prefs->name_resolve;
887 /* Read the disabled protocols file. */
888 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
889 &dp_path, &dp_open_errno, &dp_read_errno);
890 if (gdp_path != NULL) {
891 if (gdp_open_errno != 0) {
892 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
893 gdp_path, strerror(gdp_open_errno));
895 if (gdp_read_errno != 0) {
896 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
897 gdp_path, strerror(gdp_read_errno));
901 if (dp_path != NULL) {
902 if (dp_open_errno != 0) {
904 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
905 strerror(dp_open_errno));
907 if (dp_read_errno != 0) {
909 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
910 strerror(dp_read_errno));
915 check_capture_privs();
917 init_cap_file(&cfile);
919 /* Assemble the compile-time version information string */
920 comp_info_str = g_string_new("Compiled ");
921 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
923 /* Assemble the run-time version information string */
924 runtime_info_str = g_string_new("Running ");
925 get_runtime_version_info(runtime_info_str, NULL);
927 /* Print format defaults to this. */
928 print_format = PR_FMT_TEXT;
930 output_fields = output_fields_new();
932 /* Now get our args */
933 while ((opt = getopt(argc, argv, optstring)) != -1) {
935 case 'a': /* autostop criteria */
936 case 'b': /* Ringbuffer option */
937 case 'c': /* Capture x packets */
938 case 'f': /* capture filter */
939 case 'i': /* Use interface x */
940 case 'p': /* Don't capture in promiscuous mode */
941 case 's': /* Set the snapshot (capture) length */
942 case 'w': /* Write to capture file x */
943 case 'y': /* Set the pcap data link type */
945 case 'B': /* Buffer size */
948 status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
953 capture_option_specified = TRUE;
957 case 'd': /* Decode as rule */
958 if (!add_decode_as(optarg))
961 case 'D': /* Print a list of capture devices and exit */
963 status = capture_opts_list_interfaces(FALSE);
966 capture_option_specified = TRUE;
972 output_fields_add(output_fields, optarg);
976 if(!output_fields_set_option(output_fields, optarg)) {
977 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
978 output_fields_list_options(stderr);
983 out_file_type = wtap_short_string_to_file_type(optarg);
984 if (out_file_type < 0) {
985 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
986 list_capture_types();
990 case 'h': /* Print help and exit */
994 case 'l': /* "Line-buffer" standard output */
995 /* This isn't line-buffering, strictly speaking, it's just
996 flushing the standard output after the information for
997 each packet is printed; however, that should be good
998 enough for all the purposes to which "-l" is put (and
999 is probably actually better for "-V", as it does fewer
1002 See the comment in "process_packet()" for an explanation of
1003 why we do that, and why we don't just use "setvbuf()" to
1004 make the standard output line-buffered (short version: in
1005 Windows, "line-buffered" is the same as "fully-buffered",
1006 and the output buffer is only flushed when it fills up). */
1007 line_buffered = TRUE;
1009 case 'L': /* Print list of link-layer types and exit */
1011 list_link_layer_types = TRUE;
1014 capture_option_specified = TRUE;
1018 case 'n': /* No name resolution */
1019 g_resolv_flags = RESOLV_NONE;
1021 case 'N': /* Select what types of addresses/port #s to resolve */
1022 if (g_resolv_flags == RESOLV_ALL)
1023 g_resolv_flags = RESOLV_NONE;
1024 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1025 if (badopt != '\0') {
1026 cmdarg_err("-N specifies unknown resolving option '%c';",
1028 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1032 case 'o': /* Override preference from command line */
1033 switch (prefs_set_pref(optarg)) {
1038 case PREFS_SET_SYNTAX_ERR:
1039 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1043 case PREFS_SET_NO_SUCH_PREF:
1044 case PREFS_SET_OBSOLETE:
1045 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1050 case 'q': /* Quiet */
1053 case 'r': /* Read capture file x */
1054 cf_name = g_strdup(optarg);
1056 case 'R': /* Read file filter */
1059 case 'S': /* show packets in real time */
1060 print_packet_info = TRUE;
1062 case 't': /* Time stamp type */
1063 if (strcmp(optarg, "r") == 0)
1064 timestamp_set_type(TS_RELATIVE);
1065 else if (strcmp(optarg, "a") == 0)
1066 timestamp_set_type(TS_ABSOLUTE);
1067 else if (strcmp(optarg, "ad") == 0)
1068 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1069 else if (strcmp(optarg, "d") == 0)
1070 timestamp_set_type(TS_DELTA);
1071 else if (strcmp(optarg, "dd") == 0)
1072 timestamp_set_type(TS_DELTA_DIS);
1073 else if (strcmp(optarg, "e") == 0)
1074 timestamp_set_type(TS_EPOCH);
1076 cmdarg_err("Invalid time stamp type \"%s\"",
1078 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1079 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1083 case 'T': /* printing Type */
1084 if (strcmp(optarg, "text") == 0) {
1085 output_action = WRITE_TEXT;
1086 print_format = PR_FMT_TEXT;
1087 } else if (strcmp(optarg, "ps") == 0) {
1088 output_action = WRITE_TEXT;
1089 print_format = PR_FMT_PS;
1090 } else if (strcmp(optarg, "pdml") == 0) {
1091 output_action = WRITE_XML;
1093 } else if (strcmp(optarg, "psml") == 0) {
1094 output_action = WRITE_XML;
1096 } else if(strcmp(optarg, "fields") == 0) {
1097 output_action = WRITE_FIELDS;
1098 verbose = TRUE; /* Need full tree info */
1100 cmdarg_err("Invalid -T parameter.");
1101 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1105 case 'v': /* Show version and exit */
1106 printf("TShark " VERSION "%s\n"
1113 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
1114 runtime_info_str->str);
1117 case 'V': /* Verbose */
1120 case 'x': /* Print packet data in hex (and ASCII) */
1126 /* We won't call the init function for the stat this soon
1127 as it would disallow MATE's fields (which are registered
1128 by the preferences set callback) from being used as
1129 part of a tap filter. Instead, we just add the argument
1130 to a list of stat arguments. */
1131 if (!process_stat_cmd_arg(optarg)) {
1132 cmdarg_err("invalid -z argument.");
1133 cmdarg_err_cont(" -z argument must be one of :");
1134 list_stat_cmd_args();
1139 case '?': /* Bad flag - print usage message */
1142 list_capture_types();
1152 /* If we specified output fields, but not the output field type... */
1153 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1154 cmdarg_err("Output fields were specified with \"-e\", "
1155 "but \"-Tfields\" was not specified.");
1157 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1158 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1159 "specified with \"-e\".");
1164 /* If no capture filter or read filter has been specified, and there are
1165 still command-line arguments, treat them as the tokens of a capture
1166 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1167 flag was specified. */
1168 if (optind < argc) {
1169 if (cf_name != NULL) {
1170 if (rfilter != NULL) {
1171 cmdarg_err("Read filters were specified both with \"-R\" "
1172 "and with additional command-line arguments");
1175 rfilter = get_args_as_string(argc, argv, optind);
1178 if (capture_opts.has_cfilter) {
1179 cmdarg_err("Capture filters were specified both with \"-f\""
1180 " and with additional command-line arguments");
1183 capture_opts.has_cfilter = TRUE;
1184 capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1186 capture_option_specified = TRUE;
1192 if (!capture_opts.saving_to_file) {
1193 /* We're not saving the capture to a file; if "-q" wasn't specified,
1194 we should print packet information */
1196 print_packet_info = TRUE;
1198 /* We're saving to a file; if we're writing to the standard output.
1199 and we'll also be writing dissected packets to the standard
1200 output, reject the request. At best, we could redirect that
1201 to the standard error; we *can't* write both to the standard
1202 output and have either of them be useful. */
1203 if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
1204 cmdarg_err("You can't write both raw packet data and dissected packets"
1205 " to the standard output.");
1210 /* We're not saving the capture to a file; if "-q" wasn't specified,
1211 we should print packet information */
1213 print_packet_info = TRUE;
1216 #ifndef HAVE_LIBPCAP
1217 if (capture_option_specified)
1218 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1225 /* We don't support capture filters when reading from a capture file
1226 (the BPF compiler doesn't support all link-layer types that we
1227 support in capture files we read). */
1229 if (cf_name != NULL) {
1230 if (capture_opts.has_cfilter) {
1231 cmdarg_err("Only read filters, not capture filters, "
1232 "can be specified when reading a capture file.");
1239 if (output_action != WRITE_TEXT) {
1240 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1246 if (list_link_layer_types) {
1247 /* We're supposed to list the link-layer types for an interface;
1248 did the user also specify a capture file to be read? */
1250 /* Yes - that's bogus. */
1251 cmdarg_err("You can't specify -L and a capture file to be read.");
1254 /* No - did they specify a ring buffer option? */
1255 if (capture_opts.multi_files_on) {
1256 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1262 * "-r" was specified, so we're reading a capture file.
1263 * Capture options don't apply here.
1265 if (capture_opts.multi_files_on) {
1266 cmdarg_err("Multiple capture files requested, but "
1267 "a capture isn't being done.");
1270 if (capture_opts.has_file_duration) {
1271 cmdarg_err("Switching capture files after a time interval was specified, but "
1272 "a capture isn't being done.");
1275 if (capture_opts.has_ring_num_files) {
1276 cmdarg_err("A ring buffer of capture files was specified, but "
1277 "a capture isn't being done.");
1280 if (capture_opts.has_autostop_files) {
1281 cmdarg_err("A maximum number of capture files was specified, but "
1282 "a capture isn't being done.");
1286 /* Note: TShark now allows the restriction of a _read_ file by packet count
1287 * and byte count as well as a write file. Other autostop options remain valid
1288 * only for a write file.
1290 if (capture_opts.has_autostop_duration) {
1291 cmdarg_err("A maximum capture time was specified, but "
1292 "a capture isn't being done.");
1297 * "-r" wasn't specified, so we're doing a live capture.
1299 if (capture_opts.saving_to_file) {
1300 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1302 /* When capturing, we only support writing libpcap format. */
1303 if (out_file_type != WTAP_FILE_PCAP) {
1304 cmdarg_err("Live captures can only be saved in libpcap format.");
1307 if (capture_opts.multi_files_on) {
1308 /* Multiple-file mode doesn't work under certain conditions:
1309 a) it doesn't work if you're writing to the standard output;
1310 b) it doesn't work if you're writing to a pipe;
1312 if (strcmp(capture_opts.save_file, "-") == 0) {
1313 cmdarg_err("Multiple capture files requested, but "
1314 "the capture is being written to the standard output.");
1317 if (capture_opts.output_to_pipe) {
1318 cmdarg_err("Multiple capture files requested, but "
1319 "the capture file is a pipe.");
1322 if (!capture_opts.has_autostop_filesize &&
1323 !capture_opts.has_file_duration) {
1324 cmdarg_err("Multiple capture files requested, but "
1325 "no maximum capture file size or duration was specified.");
1330 /* They didn't specify a "-w" flag, so we won't be saving to a
1331 capture file. Check for options that only make sense if
1332 we're saving to a file. */
1333 if (capture_opts.has_autostop_filesize) {
1334 cmdarg_err("Maximum capture file size specified, but "
1335 "capture isn't being saved to a file.");
1338 if (capture_opts.multi_files_on) {
1339 cmdarg_err("Multiple capture files requested, but "
1340 "the capture isn't being saved to a file.");
1349 /* Start windows sockets */
1350 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1353 /* Notify all registered modules that have had any of their preferences
1354 changed either from one of the preferences file or from the command
1355 line that their preferences have changed. */
1358 /* At this point MATE will have registered its field array so we can
1359 have a tap filter with one of MATE's late-registered fields as part
1360 of the filter. We can now process all the "-z" arguments. */
1361 start_requested_stats();
1363 /* disabled protocols as per configuration file */
1364 if (gdp_path == NULL && dp_path == NULL) {
1365 set_disabled_protos_list();
1368 /* Build the column format array */
1369 col_setup(&cfile.cinfo, prefs->num_cols);
1370 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1371 cfile.cinfo.col_fmt[i] = get_column_format(i);
1372 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1373 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1375 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1376 cfile.cinfo.col_data[i] = NULL;
1377 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1378 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1380 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1381 cfile.cinfo.col_fence[i] = 0;
1382 cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1383 cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1386 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1389 for (j = 0; j < NUM_COL_FMTS; j++) {
1390 if (!cfile.cinfo.fmt_matx[i][j])
1393 if (cfile.cinfo.col_first[j] == -1)
1394 cfile.cinfo.col_first[j] = i;
1395 cfile.cinfo.col_last[j] = i;
1400 capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
1401 capture_opts_trim_ring_num_files(&capture_opts);
1404 if (rfilter != NULL) {
1405 if (!dfilter_compile(rfilter, &rfcode)) {
1406 cmdarg_err("%s", dfilter_error_msg);
1408 #ifdef HAVE_PCAP_OPEN_DEAD
1412 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1414 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1416 " Note: That display filter code looks like a valid capture filter;");
1418 " maybe you mixed them up?");
1427 cfile.rfcode = rfcode;
1429 if (print_packet_info) {
1430 /* If we're printing as text or PostScript, we have
1431 to create a print stream. */
1432 if (output_action == WRITE_TEXT) {
1433 switch (print_format) {
1436 print_stream = print_stream_text_stdio_new(stdout);
1440 print_stream = print_stream_ps_stdio_new(stdout);
1444 g_assert_not_reached();
1449 /* We have to dissect each packet if:
1451 we're printing information about each packet;
1453 we're using a read filter on the packets;
1455 we're using any taps. */
1456 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1460 * We're reading a capture file.
1464 * Immediately relinquish any special privileges we have; we must not
1465 * be allowed to read any capture files the user running TShark
1468 relinquish_special_privs_perm();
1469 print_current_user();
1471 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1476 /* Set timestamp precision; there should arguably be a command-line
1477 option to let the user set this. */
1478 switch(wtap_file_tsprecision(cfile.wth)) {
1479 case(WTAP_FILE_TSPREC_SEC):
1480 timestamp_set_precision(TS_PREC_AUTO_SEC);
1482 case(WTAP_FILE_TSPREC_DSEC):
1483 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1485 case(WTAP_FILE_TSPREC_CSEC):
1486 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1488 case(WTAP_FILE_TSPREC_MSEC):
1489 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1491 case(WTAP_FILE_TSPREC_USEC):
1492 timestamp_set_precision(TS_PREC_AUTO_USEC);
1494 case(WTAP_FILE_TSPREC_NSEC):
1495 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1498 g_assert_not_reached();
1501 /* Process the packets in the file */
1503 err = load_cap_file(&cfile, capture_opts.save_file, out_file_type,
1504 capture_opts.has_autostop_packets ? capture_opts.autostop_packets : 0,
1505 capture_opts.has_autostop_filesize ? capture_opts.autostop_filesize : 0);
1507 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1515 /* No capture file specified, so we're supposed to do a live capture
1516 (or get a list of link-layer types for a live capture device);
1517 do we have support for live captures? */
1524 cmdarg_err("WinPcap couldn't be found.");
1525 detailed_err = cant_load_winpcap_err("TShark");
1526 cmdarg_err_cont("%s", detailed_err);
1527 g_free(detailed_err);
1532 /* trim the interface name and exit if that failed */
1533 if (!capture_opts_trim_iface(&capture_opts,
1534 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1538 /* if requested, list the link layer types and exit */
1539 if (list_link_layer_types) {
1540 status = capture_opts_list_link_layer_types(&capture_opts, FALSE);
1544 if (print_packet_info) {
1545 if (!write_preamble(NULL)) {
1547 show_print_file_io_error(err);
1550 } else if (!quiet) {
1552 * We're not printing information for each packet, and the user
1553 * didn't ask us not to print a count of packets as they arrive,
1554 * so print that count so the user knows that packets are arriving.
1556 * XXX - what if the user wants to do a live capture, doesn't want
1557 * to save it to a file, doesn't want information printed for each
1558 * packet, does want some "-z" statistic, and wants packet counts
1559 * so they know whether they're seeing any packets?
1561 print_packet_counts = TRUE;
1564 /* For now, assume libpcap gives microsecond precision. */
1565 timestamp_set_precision(TS_PREC_AUTO_USEC);
1569 if (print_packet_info) {
1570 if (!write_finale()) {
1572 show_print_file_io_error(err);
1576 /* No - complain. */
1577 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1582 draw_tap_listeners(TRUE);
1583 funnel_dump_all_text_windows();
1586 output_fields_free(output_fields);
1587 output_fields = NULL;
1592 /*#define USE_BROKEN_G_MAIN_LOOP*/
1594 #ifdef USE_BROKEN_G_MAIN_LOOP
1597 gboolean loop_running = FALSE;
1599 guint32 packet_count = 0;
1602 /* XXX - move to the right position / file */
1603 /* read from a pipe (callback) */
1604 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1606 typedef struct pipe_input_tag {
1610 pipe_input_cb_t input_cb;
1611 guint pipe_input_id;
1613 GStaticMutex callback_running;
1617 static pipe_input_t pipe_input;
1620 /* The timer has expired, see if there's stuff to read from the pipe,
1621 if so, do the callback */
1623 pipe_timer_cb(gpointer data)
1627 gboolean result, result1;
1629 pipe_input_t *pipe_input = data;
1630 gint iterations = 0;
1633 g_static_mutex_lock (&pipe_input->callback_running);
1635 /* try to read data from the pipe only 5 times, to avoid blocking */
1636 while(iterations < 5) {
1637 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1639 /* Oddly enough although Named pipes don't work on win9x,
1640 PeekNamedPipe does !!! */
1641 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1642 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1644 /* Get the child process exit status */
1645 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1648 /* If the Peek returned an error, or there are bytes to be read
1649 or the childwatcher thread has terminated then call the normal
1651 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1653 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1655 /* And call the real handler */
1656 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1657 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1658 /* pipe closed, return false so that the timer is stopped */
1659 g_static_mutex_unlock (&pipe_input->callback_running);
1664 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1665 /* No data, stop now */
1672 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1674 g_static_mutex_unlock (&pipe_input->callback_running);
1676 /* we didn't stopped the timer, so let it run */
1683 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1686 pipe_input.source = source;
1687 pipe_input.child_process = child_process;
1688 pipe_input.user_data = user_data;
1689 pipe_input.input_cb = input_cb;
1692 g_static_mutex_init(&pipe_input.callback_running);
1693 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1694 do this but that doesn't cover all win32 platforms. GTK can do
1695 this but doesn't seem to work over processes. Attempt to do
1696 something similar here, start a timer and check for data on every
1698 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1699 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1709 #ifdef USE_TSHARK_SELECT
1713 struct sigaction action, oldaction;
1717 * XXX - dropping privileges is still required, until code cleanup is done
1719 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1720 * when it's done, we don't need special privileges to run tshark at all,
1721 * therefore we don't need to drop these privileges
1722 * The only thing we might want to keep is a warning if tshark is run as root,
1723 * as it's no longer necessary and potentially dangerous.
1725 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1726 * We've opened the capture device, so we shouldn't need any special
1727 * privileges any more; relinquish those privileges.
1729 * XXX - if we have saved set-user-ID support, we should give up those
1730 * privileges immediately, and then reclaim them long enough to get
1731 * a list of network interfaces and to open one, and then give them
1732 * up again, so that stuff we do while processing the argument list,
1733 * reading the user's preferences, loading and starting plugins
1734 * (especially *user* plugins), etc. is done with the user's privileges,
1735 * not special privileges.
1737 relinquish_special_privs_perm();
1738 print_current_user();
1740 /* Initialize all data structures used for dissection. */
1744 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1745 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1747 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1749 action.sa_handler = capture_cleanup;
1750 action.sa_flags = 0;
1752 sigaction(SIGTERM, &action, NULL);
1753 sigaction(SIGINT, &action, NULL);
1754 sigaction(SIGHUP, NULL, &oldaction);
1755 if (oldaction.sa_handler == SIG_DFL)
1756 sigaction(SIGHUP, &action, NULL);
1759 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1760 quiet mode, report the number of packets we've captured. */
1761 action.sa_handler = report_counts_siginfo;
1762 action.sa_flags = 0;
1764 sigaction(SIGINFO, &action, NULL);
1765 #endif /* SIGINFO */
1768 capture_opts.state = CAPTURE_PREPARING;
1770 /* Let the user know what interface was chosen. */
1771 capture_opts.iface_descr = get_interface_descriptive_name(capture_opts.iface);
1772 fprintf(stderr, "Capturing on %s\n", capture_opts.iface_descr);
1774 ret = sync_pipe_start(&capture_opts);
1779 /* the actual capture loop
1781 * XXX - glib doesn't seem to provide any event based loop handling.
1783 * XXX - for whatever reason,
1784 * calling g_main_loop_new() ends up in 100% cpu load.
1786 * But that doesn't matter: in UNIX we can use select() to find an input
1787 * source with something to do.
1789 * But that doesn't matter because we're in a CLI (that doesn't need to
1790 * update a GUI or something at the same time) so it's OK if we block
1791 * trying to read from the pipe.
1793 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1794 * wrong (but I leave it there in case I am...).
1797 #ifdef USE_TSHARK_SELECT
1799 FD_SET(pipe_input.source, &readfds);
1802 loop_running = TRUE;
1804 while (loop_running)
1806 #ifdef USE_TSHARK_SELECT
1807 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1813 } else if (ret == 1) {
1815 /* Call the real handler */
1816 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1817 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1820 #ifdef USE_TSHARK_SELECT
1829 /* XXX - move the call to main_window_update() out of capture_sync.c */
1830 /* dummy for capture_sync.c to make linker happy */
1831 void main_window_update(void)
1835 /* XXX - move the call to simple_dialog() out of capture_sync.c */
1836 #include "simple_dialog.h"
1838 /* capture_sync.c want's to tell us an error */
1839 gpointer simple_dialog(ESD_TYPE_E type _U_, gint btn_mask _U_,
1840 const gchar *msg_format, ...)
1844 /* XXX - do we need to display buttons and alike? */
1845 va_start(ap, msg_format);
1846 fprintf(stderr, "tshark: ");
1847 vfprintf(stderr, msg_format, ap);
1848 fprintf(stderr, "\n");
1855 /* capture child detected an error */
1857 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1859 cmdarg_err("%s", error_msg);
1860 cmdarg_err_cont("%s", secondary_error_msg);
1864 /* capture child detected an capture filter related error */
1866 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1868 dfilter_t *rfcode = NULL;
1871 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1873 "Invalid capture filter: \"%s\"!\n"
1875 "That string looks like a valid display filter; however, it isn't a valid\n"
1876 "capture filter (%s).\n"
1878 "Note that display filters and capture filters don't have the same syntax,\n"
1879 "so you can't use most display filter expressions as capture filters.\n"
1881 "See the User's Guide for a description of the capture filter syntax.",
1882 capture_opts->cfilter, error_message);
1883 dfilter_free(rfcode);
1886 "Invalid capture filter: \"%s\"!\n"
1888 "That string isn't a valid capture filter (%s).\n"
1889 "See the User's Guide for a description of the capture filter syntax.",
1890 capture_opts->cfilter, error_message);
1895 /* capture child tells us we have a new (or the first) capture file */
1897 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1899 gboolean is_tempfile;
1903 if(capture_opts->state == CAPTURE_PREPARING) {
1904 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1906 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1908 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1910 capture_opts->cf = &cfile;
1912 /* free the old filename */
1913 if(capture_opts->save_file != NULL) {
1914 /* we start a new capture file, close the old one (if we had one before) */
1915 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1916 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
1917 wtap_close(((capture_file *) capture_opts->cf)->wth);
1920 g_free(capture_opts->save_file);
1921 is_tempfile = FALSE;
1923 /* we didn't had a save_file before, must be a tempfile */
1927 /* save the new filename */
1928 capture_opts->save_file = g_strdup(new_file);
1930 /* if we are in real-time mode, open the new file now */
1932 /* Attempt to open the capture file and set up to read from it. */
1933 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1937 /* Don't unlink (delete) the save file - leave it around,
1938 for debugging purposes. */
1939 g_free(capture_opts->save_file);
1940 capture_opts->save_file = NULL;
1946 capture_opts->state = CAPTURE_RUNNING;
1952 /* capture child tells us we have new packets to read */
1954 capture_input_new_packets(capture_options *capture_opts, int to_read)
1960 capture_file *cf = capture_opts->cf;
1965 * Prevent a SIGINFO handler from writing to stdout while we're
1966 * doing so; instead, have it just set a flag telling us to print
1967 * that information when we're done.
1970 #endif /* SIGINFO */
1973 while (to_read-- && cf->wth) {
1974 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
1976 /* read from file failed, tell the capture child to stop */
1977 sync_pipe_stop(capture_opts);
1978 wtap_close(cf->wth);
1981 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
1982 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth));
1985 /* packet sucessfully read and gone through the "Read Filter" */
1991 * Dumpcap's doing all the work; we're not doing any dissection.
1992 * Count all the packets it wrote.
1994 packet_count += to_read;
1997 if (print_packet_counts) {
1998 /* We're printing packet counts. */
1999 if (packet_count != 0) {
2000 fprintf(stderr, "\r%u ", packet_count);
2001 /* stderr could be line buffered */
2008 * Allow SIGINFO handlers to write.
2013 * If a SIGINFO handler asked us to write out capture counts, do so.
2017 #endif /* SIGINFO */
2023 if (!print_packet_counts) {
2024 /* Report the count only if we aren't printing a packet count
2025 as packets arrive. */
2026 fprintf(stderr, "%u packets captured\n", packet_count);
2029 infoprint = FALSE; /* we just reported it */
2030 #endif /* SIGINFO */
2035 report_counts_siginfo(int signum _U_)
2037 int sav_errno = errno;
2038 /* If we've been told to delay printing, just set a flag asking
2039 that we print counts (if we're supposed to), otherwise print
2040 the count of packets captured (if we're supposed to). */
2047 #endif /* SIGINFO */
2050 /* capture child detected any packet drops? */
2052 capture_input_drops(capture_options *capture_opts _U_, int dropped)
2054 if (print_packet_counts) {
2055 /* We're printing packet counts to stderr.
2056 Send a newline so that we move to the line after the packet count. */
2057 fprintf(stderr, "\n");
2061 /* We're printing packet counts to stderr.
2062 Send a newline so that we move to the line after the packet count. */
2063 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2068 /* capture child closed its side of the pipe, do the required cleanup */
2070 capture_input_closed(capture_options *capture_opts)
2074 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2075 wtap_close(((capture_file *) capture_opts->cf)->wth);
2077 #ifdef USE_BROKEN_G_MAIN_LOOP
2078 /*g_main_loop_quit(loop);*/
2081 loop_running = FALSE;
2090 capture_cleanup(DWORD ctrltype _U_)
2092 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2093 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2094 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2095 like SIGTERM at least when the machine's shutting down.
2097 For now, we handle them all as indications that we should clean up
2098 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2101 However, as handlers run in a new thread, we can't just longjmp
2102 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2103 no other handler - such as one that would terminate the process -
2106 XXX - for some reason, typing ^C to TShark, if you run this in
2107 a Cygwin console window in at least some versions of Cygwin,
2108 causes TShark to terminate immediately; this routine gets
2109 called, but the main loop doesn't get a chance to run and
2110 exit cleanly, at least if this is compiled with Microsoft Visual
2111 C++ (i.e., it's a property of the Cygwin console window or Bash;
2112 it happens if TShark is not built with Cygwin - for all I know,
2113 building it with Cygwin may make the problem go away). */
2115 /* tell the capture child to stop */
2116 sync_pipe_stop(&capture_opts);
2118 /* don't stop our own loop already here, otherwise status messages and
2119 * cleanup wouldn't be done properly. The child will indicate the stop of
2120 * everything by calling capture_input_closed() later */
2126 capture_cleanup(int signum _U_)
2128 /* tell the capture child to stop */
2129 sync_pipe_stop(&capture_opts);
2132 #endif /* HAVE_LIBPCAP */
2135 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2136 int max_packet_count, gint64 max_byte_count)
2139 int snapshot_length;
2144 char *save_file_string = NULL;
2146 linktype = wtap_file_encap(cf->wth);
2147 if (save_file != NULL) {
2148 /* Get a string that describes what we're writing to */
2149 save_file_string = output_file_description(save_file);
2151 /* Set up to write to the capture file. */
2152 snapshot_length = wtap_snapshot_length(cf->wth);
2153 if (snapshot_length == 0) {
2154 /* Snapshot length of input file not known. */
2155 snapshot_length = WTAP_MAX_PACKET_SIZE;
2157 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2158 FALSE /* compressed */, &err);
2161 /* We couldn't set up to write to the capture file. */
2164 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2165 cmdarg_err("Capture files can't be written in that format.");
2168 case WTAP_ERR_UNSUPPORTED_ENCAP:
2169 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2170 cmdarg_err("The capture file being read can't be written in "
2174 case WTAP_ERR_CANT_OPEN:
2175 cmdarg_err("The %s couldn't be created for some "
2176 "unknown reason.", save_file_string);
2179 case WTAP_ERR_SHORT_WRITE:
2180 cmdarg_err("A full header couldn't be written to the %s.",
2185 cmdarg_err("The %s could not be created: %s.", save_file_string,
2186 wtap_strerror(err));
2192 if (print_packet_info) {
2193 if (!write_preamble(cf)) {
2195 show_print_file_io_error(err);
2201 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2202 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2203 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2204 /* Either there's no read filtering or this packet passed the
2205 filter, so, if we're writing to a capture file, write
2208 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2209 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2211 /* Error writing to a capture file */
2212 show_capture_file_io_error(save_file, err, FALSE);
2213 wtap_dump_close(pdh, &err);
2217 /* Stop reading if we have the maximum number of packets;
2218 * note that a zero max_packet_count will never be matched
2219 * (unless we roll over the packet number?)
2221 if(max_packet_count == cf->count || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2222 err = 0; /* This is not an error */
2228 /* Print a message noting that the read failed somewhere along the line. */
2231 case WTAP_ERR_UNSUPPORTED_ENCAP:
2232 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2233 cf->filename, err_info);
2236 case WTAP_ERR_CANT_READ:
2237 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2241 case WTAP_ERR_SHORT_READ:
2242 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2246 case WTAP_ERR_BAD_RECORD:
2247 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2248 cf->filename, err_info);
2252 cmdarg_err("An error occurred while reading \"%s\": %s.",
2253 cf->filename, wtap_strerror(err));
2256 if (save_file != NULL) {
2257 /* Now close the capture file. */
2258 if (!wtap_dump_close(pdh, &err))
2259 show_capture_file_io_error(save_file, err, TRUE);
2262 if (save_file != NULL) {
2263 /* Now close the capture file. */
2264 if (!wtap_dump_close(pdh, &err))
2265 show_capture_file_io_error(save_file, err, TRUE);
2267 if (print_packet_info) {
2268 if (!write_finale()) {
2270 show_print_file_io_error(err);
2277 wtap_close(cf->wth);
2280 if (save_file_string != NULL)
2281 g_free(save_file_string);
2287 fill_in_fdata(frame_data *fdata, capture_file *cf,
2288 const struct wtap_pkthdr *phdr, gint64 offset)
2293 fdata->num = cf->count;
2294 fdata->pkt_len = phdr->len;
2295 cum_bytes += phdr->len;
2296 fdata->cum_bytes = cum_bytes;
2297 fdata->cap_len = phdr->caplen;
2298 fdata->file_off = offset;
2299 fdata->lnk_t = phdr->pkt_encap;
2300 fdata->abs_ts.secs = phdr->ts.secs;
2301 fdata->abs_ts.nsecs = phdr->ts.nsecs;
2302 fdata->flags.passed_dfilter = 0;
2303 fdata->flags.encoding = CHAR_ASCII;
2304 fdata->flags.visited = 0;
2305 fdata->flags.marked = 0;
2306 fdata->flags.ref_time = 0;
2307 fdata->color_filter = NULL;
2309 /* If we don't have the time stamp of the first packet in the
2310 capture, it's because this is the first packet. Save the time
2311 stamp of this packet as the time stamp of the first packet. */
2312 if (nstime_is_unset(&first_ts)) {
2313 first_ts = fdata->abs_ts;
2316 /* If we don't have the time stamp of the previous captured packet,
2317 it's because this is the first packet. Save the time
2318 stamp of this packet as the time stamp of the previous captured
2320 if (nstime_is_unset(&prev_cap_ts)) {
2321 prev_cap_ts = fdata->abs_ts;
2324 /* Get the time elapsed between the first packet and this packet. */
2325 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2327 /* If it's greater than the current elapsed time, set the elapsed time
2328 to it (we check for "greater than" so as not to be confused by
2329 time moving backwards). */
2330 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2331 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2332 cf->elapsed_time = fdata->rel_ts;
2335 /* Get the time elapsed between the previous displayed packet and
2337 if (nstime_is_unset(&prev_dis_ts))
2338 nstime_set_zero(&fdata->del_dis_ts);
2340 nstime_delta(&fdata->del_dis_ts, &fdata->abs_ts, &prev_dis_ts);
2342 /* Get the time elapsed between the previous captured packet and
2344 nstime_delta(&fdata->del_cap_ts, &fdata->abs_ts, &prev_cap_ts);
2345 prev_cap_ts = fdata->abs_ts;
2348 /* Free up all data attached to a "frame_data" structure. */
2350 clear_fdata(frame_data *fdata)
2353 g_slist_free(fdata->pfd);
2357 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2358 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2361 gboolean create_proto_tree;
2362 epan_dissect_t *edt;
2365 /* Count this packet. */
2368 /* If we're going to print packet information, or we're going to
2369 run a read filter, or we're going to process taps, set up to
2370 do a dissection and do so. */
2371 if (do_dissection) {
2372 fill_in_fdata(&fdata, cf, whdr, offset);
2374 if (print_packet_info) {
2375 /* Grab any resolved addresses */
2377 if (g_resolv_flags) {
2378 host_name_lookup_process(NULL);
2383 if (cf->rfcode || verbose || num_tap_filters!=0)
2384 create_proto_tree = TRUE;
2386 create_proto_tree = FALSE;
2387 /* The protocol tree will be "visible", i.e., printed, only if we're
2388 printing packet details, which is true if we're printing stuff
2389 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2391 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2393 /* If we're running a read filter, prime the epan_dissect_t with that
2396 epan_dissect_prime_dfilter(edt, cf->rfcode);
2398 tap_queue_init(edt);
2400 /* We only need the columns if we're printing packet info but we're
2401 *not* verbose; in verbose mode, we print the protocol tree, not
2402 the protocol summary. */
2403 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2404 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2406 tap_push_tapped_queue(edt);
2408 /* Run the read filter if we have one. */
2410 passed = dfilter_apply_edt(cf->rfcode, edt);
2414 /* We're not running a display filter and we're not printing any
2415 packet information, so we don't need to do a dissection, and all
2416 packets are processed. */
2422 /* Keep the time of the current packet if the packet passed
2423 the read filter so that the delta time since last displayed
2424 packet can be calculated */
2425 prev_dis_ts = fdata.abs_ts;
2427 /* Process this packet. */
2428 if (print_packet_info) {
2429 /* We're printing packet information; print the information for
2431 print_packet(cf, edt);
2433 /* The ANSI C standard does not appear to *require* that a line-buffered
2434 stream be flushed to the host environment whenever a newline is
2435 written, it just says that, on such a stream, characters "are
2436 intended to be transmitted to or from the host environment as a
2437 block when a new-line character is encountered".
2439 The Visual C++ 6.0 C implementation doesn't do what is intended;
2440 even if you set a stream to be line-buffered, it still doesn't
2441 flush the buffer at the end of every line.
2443 So, if the "-l" flag was specified, we flush the standard output
2444 at the end of a packet. This will do the right thing if we're
2445 printing packet summary lines, and, as we print the entire protocol
2446 tree for a single packet without waiting for anything to happen,
2447 it should be as good as line-buffered mode if we're printing
2448 protocol trees. (The whole reason for the "-l" flag in either
2449 tcpdump or TShark is to allow the output of a live capture to
2450 be piped to a program or script and to have that script see the
2451 information for the packet as soon as it's printed, rather than
2452 having to wait until a standard I/O buffer fills up. */
2456 if (ferror(stdout)) {
2457 show_print_file_io_error(errno);
2463 if (do_dissection) {
2464 epan_dissect_free(edt);
2465 clear_fdata(&fdata);
2471 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2473 char *save_file_string;
2475 save_file_string = output_file_description(fname);
2480 cmdarg_err("Not all the packets could be written to the %s because there is "
2481 "no space left on the file system.",
2487 cmdarg_err("Not all the packets could be written to the %s because you are "
2488 "too close to, or over your disk quota.",
2493 case WTAP_ERR_CANT_CLOSE:
2494 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2498 case WTAP_ERR_SHORT_WRITE:
2499 cmdarg_err("Not all the packets could be written to the %s.",
2505 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2506 wtap_strerror(err));
2508 cmdarg_err("An error occurred while writing to the %s: %s.",
2509 save_file_string, wtap_strerror(err));
2513 g_free(save_file_string);
2517 write_preamble(capture_file *cf)
2519 switch (output_action) {
2522 return print_preamble(print_stream, cf ? cf->filename : NULL);
2527 write_pdml_preamble(stdout);
2529 write_psml_preamble(stdout);
2530 return !ferror(stdout);
2533 write_fields_preamble(output_fields, stdout);
2534 return !ferror(stdout);
2537 g_assert_not_reached();
2543 get_line_buf(size_t len)
2545 static char *line_bufp = NULL;
2546 static size_t line_buf_len = 256;
2547 size_t new_line_buf_len;
2549 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2550 new_line_buf_len *= 2)
2552 if (line_bufp == NULL) {
2553 line_buf_len = new_line_buf_len;
2554 line_bufp = g_malloc(line_buf_len + 1);
2556 if (new_line_buf_len > line_buf_len) {
2557 line_buf_len = new_line_buf_len;
2558 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2565 print_columns(capture_file *cf)
2572 line_bufp = get_line_buf(256);
2575 for (i = 0; i < cf->cinfo.num_cols; i++) {
2576 switch (cf->cinfo.col_fmt[i]) {
2580 * Don't print this if we're doing a live capture from a network
2581 * interface - if we're doing a live capture, you won't be
2582 * able to look at the capture in the future (it's not being
2583 * saved anywhere), so the frame numbers are unlikely to be
2586 * (XXX - it might be nice to be able to save and print at
2587 * the same time, sort of like an "Update list of packets
2588 * in real time" capture in Wireshark.)
2590 if (capture_opts.iface != NULL)
2593 column_len = strlen(cf->cinfo.col_data[i]);
2596 line_bufp = get_line_buf(buf_offset + column_len);
2597 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2603 case COL_ABS_DATE_TIME: /* XXX - wider */
2604 column_len = strlen(cf->cinfo.col_data[i]);
2605 if (column_len < 10)
2607 line_bufp = get_line_buf(buf_offset + column_len);
2608 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2614 case COL_DEF_DL_SRC:
2615 case COL_RES_DL_SRC:
2616 case COL_UNRES_DL_SRC:
2617 case COL_DEF_NET_SRC:
2618 case COL_RES_NET_SRC:
2619 case COL_UNRES_NET_SRC:
2620 column_len = strlen(cf->cinfo.col_data[i]);
2621 if (column_len < 12)
2623 line_bufp = get_line_buf(buf_offset + column_len);
2624 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2630 case COL_DEF_DL_DST:
2631 case COL_RES_DL_DST:
2632 case COL_UNRES_DL_DST:
2633 case COL_DEF_NET_DST:
2634 case COL_RES_NET_DST:
2635 case COL_UNRES_NET_DST:
2636 column_len = strlen(cf->cinfo.col_data[i]);
2637 if (column_len < 12)
2639 line_bufp = get_line_buf(buf_offset + column_len);
2640 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2644 column_len = strlen(cf->cinfo.col_data[i]);
2645 line_bufp = get_line_buf(buf_offset + column_len);
2646 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2649 buf_offset += column_len;
2650 if (i != cf->cinfo.num_cols - 1) {
2652 * This isn't the last column, so we need to print a
2653 * separator between this column and the next.
2655 * If we printed a network source and are printing a
2656 * network destination of the same type next, separate
2657 * them with "->"; if we printed a network destination
2658 * and are printing a network source of the same type
2659 * next, separate them with "<-"; otherwise separate them
2662 * We add enough space to the buffer for " <- " or " -> ",
2663 * even if we're only adding " ".
2665 line_bufp = get_line_buf(buf_offset + 4);
2666 switch (cf->cinfo.col_fmt[i]) {
2671 switch (cf->cinfo.col_fmt[i + 1]) {
2676 strcat(line_bufp + buf_offset, " -> ");
2681 strcat(line_bufp + buf_offset, " ");
2687 case COL_DEF_DL_SRC:
2688 case COL_RES_DL_SRC:
2689 case COL_UNRES_DL_SRC:
2690 switch (cf->cinfo.col_fmt[i + 1]) {
2692 case COL_DEF_DL_DST:
2693 case COL_RES_DL_DST:
2694 case COL_UNRES_DL_DST:
2695 strcat(line_bufp + buf_offset, " -> ");
2700 strcat(line_bufp + buf_offset, " ");
2706 case COL_DEF_NET_SRC:
2707 case COL_RES_NET_SRC:
2708 case COL_UNRES_NET_SRC:
2709 switch (cf->cinfo.col_fmt[i + 1]) {
2711 case COL_DEF_NET_DST:
2712 case COL_RES_NET_DST:
2713 case COL_UNRES_NET_DST:
2714 strcat(line_bufp + buf_offset, " -> ");
2719 strcat(line_bufp + buf_offset, " ");
2728 switch (cf->cinfo.col_fmt[i + 1]) {
2733 strcat(line_bufp + buf_offset, " <- ");
2738 strcat(line_bufp + buf_offset, " ");
2744 case COL_DEF_DL_DST:
2745 case COL_RES_DL_DST:
2746 case COL_UNRES_DL_DST:
2747 switch (cf->cinfo.col_fmt[i + 1]) {
2749 case COL_DEF_DL_SRC:
2750 case COL_RES_DL_SRC:
2751 case COL_UNRES_DL_SRC:
2752 strcat(line_bufp + buf_offset, " <- ");
2757 strcat(line_bufp + buf_offset, " ");
2763 case COL_DEF_NET_DST:
2764 case COL_RES_NET_DST:
2765 case COL_UNRES_NET_DST:
2766 switch (cf->cinfo.col_fmt[i + 1]) {
2768 case COL_DEF_NET_SRC:
2769 case COL_RES_NET_SRC:
2770 case COL_UNRES_NET_SRC:
2771 strcat(line_bufp + buf_offset, " <- ");
2776 strcat(line_bufp + buf_offset, " ");
2783 strcat(line_bufp + buf_offset, " ");
2789 return print_line(print_stream, 0, line_bufp);
2793 print_packet(capture_file *cf, epan_dissect_t *edt)
2795 print_args_t print_args;
2798 /* Print the information in the protocol tree. */
2799 switch (output_action) {
2802 print_args.to_file = TRUE;
2803 print_args.format = print_format;
2804 print_args.print_summary = !verbose;
2805 print_args.print_hex = verbose && print_hex;
2806 print_args.print_formfeed = FALSE;
2807 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2809 /* init the packet range */
2810 packet_range_init(&print_args.range);
2812 if (!proto_tree_print(&print_args, edt, print_stream))
2815 /* "print_hex_data()" will put out a leading blank line, as well
2816 as a trailing one; print one here, to separate the packets,
2817 only if "print_hex_data()" won't be called. */
2818 if (!print_line(print_stream, 0, ""))
2824 proto_tree_write_pdml(edt, stdout);
2826 return !ferror(stdout);
2828 proto_tree_write_fields(output_fields, edt, stdout);
2830 return !ferror(stdout);
2833 /* Just fill in the columns. */
2834 epan_dissect_fill_in_columns(edt);
2836 /* Now print them. */
2837 switch (output_action) {
2840 if (!print_columns(cf))
2845 proto_tree_write_psml(edt, stdout);
2846 return !ferror(stdout);
2847 case WRITE_FIELDS: /*No non-verbose "fields" format */
2848 g_assert_not_reached();
2853 if (!print_hex_data(print_stream, edt))
2855 if (!print_line(print_stream, 0, ""))
2864 switch (output_action) {
2867 return print_finale(print_stream);
2872 write_pdml_finale(stdout);
2874 write_psml_finale(stdout);
2875 return !ferror(stdout);
2878 write_fields_finale(output_fields, stdout);
2879 return !ferror(stdout);
2882 g_assert_not_reached();
2888 show_print_file_io_error(int err)
2893 cmdarg_err("Not all the packets could be printed because there is "
2894 "no space left on the file system.");
2899 cmdarg_err("Not all the packets could be printed because you are "
2900 "too close to, or over your disk quota.");
2905 cmdarg_err("An error occurred while printing packets: %s.",
2912 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2916 static char errmsg_errno[1024+1];
2919 /* Wiretap error. */
2922 case WTAP_ERR_NOT_REGULAR_FILE:
2923 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2926 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2927 /* Seen only when opening a capture file for reading. */
2928 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2931 case WTAP_ERR_UNSUPPORTED:
2932 /* Seen only when opening a capture file for reading. */
2933 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2934 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2937 errmsg = errmsg_errno;
2940 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2941 /* Seen only when opening a capture file for writing. */
2942 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2943 "The file \"%%s\" is a pipe, and %s capture files can't be "
2944 "written to a pipe.", wtap_file_type_string(file_type));
2945 errmsg = errmsg_errno;
2948 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2949 /* Seen only when opening a capture file for writing. */
2950 errmsg = "TShark doesn't support writing capture files in that format.";
2953 case WTAP_ERR_UNSUPPORTED_ENCAP:
2955 errmsg = "TShark can't save this capture in that format.";
2957 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2958 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2961 errmsg = errmsg_errno;
2965 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2967 errmsg = "TShark can't save this capture in that format.";
2969 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
2972 case WTAP_ERR_BAD_RECORD:
2973 /* Seen only when opening a capture file for reading. */
2974 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2975 "The file \"%%s\" appears to be damaged or corrupt.\n"
2978 errmsg = errmsg_errno;
2981 case WTAP_ERR_CANT_OPEN:
2983 errmsg = "The file \"%s\" could not be created for some unknown reason.";
2985 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
2988 case WTAP_ERR_SHORT_READ:
2989 errmsg = "The file \"%s\" appears to have been cut short"
2990 " in the middle of a packet or other data.";
2993 case WTAP_ERR_SHORT_WRITE:
2994 errmsg = "A full header couldn't be written to the file \"%s\".";
2998 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2999 "The file \"%%s\" could not be %s: %s.",
3000 for_writing ? "created" : "opened",
3001 wtap_strerror(err));
3002 errmsg = errmsg_errno;
3006 errmsg = file_open_error_message(err, for_writing);
3011 * Open/create errors are reported with an console message in TShark.
3014 open_failure_message(const char *filename, int err, gboolean for_writing)
3016 fprintf(stderr, "tshark: ");
3017 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3018 fprintf(stderr, "\n");
3022 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3026 char err_msg[2048+1];
3028 wth = wtap_open_offline(fname, err, &err_info, FALSE);
3032 /* The open succeeded. Fill in the information for this file. */
3034 /* Initialize all data structures used for dissection. */
3038 cf->f_datalen = 0; /* not used, but set it anyway */
3040 /* Set the file name because we need it to set the follow stream filter.
3041 XXX - is that still true? We need it for other reasons, though,
3043 cf->filename = g_strdup(fname);
3045 /* Indicate whether it's a permanent or temporary file. */
3046 cf->is_tempfile = is_tempfile;
3048 /* If it's a temporary capture buffer file, mark it as not saved. */
3049 cf->user_saved = !is_tempfile;
3051 cf->cd_t = wtap_file_type(cf->wth);
3053 cf->drops_known = FALSE;
3055 cf->snap = wtap_snapshot_length(cf->wth);
3056 if (cf->snap == 0) {
3057 /* Snapshot length not known. */
3058 cf->has_snap = FALSE;
3059 cf->snap = WTAP_MAX_PACKET_SIZE;
3061 cf->has_snap = TRUE;
3062 nstime_set_zero(&cf->elapsed_time);
3063 nstime_set_unset(&first_ts);
3064 nstime_set_unset(&prev_dis_ts);
3065 nstime_set_unset(&prev_cap_ts);
3070 g_snprintf(err_msg, sizeof err_msg,
3071 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3072 cmdarg_err("%s", err_msg);
3078 * General errors are reported with an console message in TShark.
3081 failure_message(const char *msg_format, va_list ap)
3083 fprintf(stderr, "tshark: ");
3084 vfprintf(stderr, msg_format, ap);
3085 fprintf(stderr, "\n");
3089 * Read errors are reported with an console message in TShark.
3092 read_failure_message(const char *filename, int err)
3094 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3095 filename, strerror(err));
3099 * Report an error in command-line arguments.
3102 cmdarg_err(const char *fmt, ...)
3107 fprintf(stderr, "tshark: ");
3108 vfprintf(stderr, fmt, ap);
3109 fprintf(stderr, "\n");
3114 * Report additional information for an error in command-line arguments.
3117 cmdarg_err_cont(const char *fmt, ...)
3122 vfprintf(stderr, fmt, ap);
3123 fprintf(stderr, "\n");