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 "console_io.h"
81 #include "cmdarg_err.h"
82 #include "version_info.h"
83 #include <epan/plugins.h>
85 #include <epan/epan_dissect.h>
87 #include <epan/stat_cmd_args.h>
88 #include <epan/timestamp.h>
89 #include <epan/ex-opt.h>
92 #include "capture_ui_utils.h"
93 #include "capture_ifinfo.h"
94 #include "capture-pcap-util.h"
96 #include "capture-wpcap.h"
97 #include "capture_errs.h"
99 #include "capture_sync.h"
100 #endif /* HAVE_LIBPCAP */
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 guint32 cum_bytes;
112 static nstime_t first_ts;
113 static nstime_t prev_dis_ts;
114 static nstime_t prev_cap_ts;
116 static gboolean print_packet_info; /* TRUE if we're to print packet information */
118 static gboolean perform_two_pass_analysis;
121 * The way the packet decode is to be written.
124 WRITE_TEXT, /* summary or detail text */
125 WRITE_XML, /* PDML or PSML */
126 WRITE_FIELDS /* User defined list of fields */
127 /* Add CSV and the like here */
130 static output_action_e output_action;
131 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
132 static gboolean verbose;
133 static gboolean print_hex;
134 static gboolean line_buffered;
136 static print_format_e print_format = PR_FMT_TEXT;
137 static print_stream_t *print_stream;
139 static output_fields_t* output_fields = NULL;
142 * Standard secondary message for unexpected errors.
144 static const char please_report[] =
145 "Please report this to the Wireshark developers";
149 * TRUE if we're to print packet counts to keep track of captured packets.
151 static gboolean print_packet_counts;
154 static capture_options global_capture_opts;
157 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
158 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
161 static int capture(void);
162 static void report_counts(void);
164 static BOOL WINAPI capture_cleanup(DWORD);
166 static void capture_cleanup(int);
168 static void report_counts_siginfo(int);
171 #endif /* HAVE_LIBPCAP */
173 static int load_cap_file(capture_file *, char *, int, int, gint64);
174 static gboolean process_packet(capture_file *cf, gint64 offset,
175 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
176 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
177 static void show_capture_file_io_error(const char *, int, gboolean);
178 static void show_print_file_io_error(int err);
179 static gboolean write_preamble(capture_file *cf);
180 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
181 static gboolean write_finale(void);
182 static const char *cf_open_error_message(int err, gchar *err_info,
183 gboolean for_writing, int file_type);
185 static void open_failure_message(const char *filename, int err,
186 gboolean for_writing);
187 static void failure_message(const char *msg_format, va_list ap);
188 static void read_failure_message(const char *filename, int err);
189 static void write_failure_message(const char *filename, int err);
194 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
196 g_assert_not_reached();
199 static void list_capture_types(void) {
202 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
203 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
204 if (wtap_dump_can_open(i))
205 fprintf(stderr, " %s - %s\n",
206 wtap_file_type_short_string(i), wtap_file_type_string(i));
211 print_usage(gboolean print_ver)
218 "TShark " VERSION "%s\n"
219 "Dump and analyze network traffic.\n"
220 "See http://www.wireshark.org for more information.\n"
223 wireshark_svnversion, get_copyright_info());
227 fprintf(output, "\n");
228 fprintf(output, "Usage: tshark [options] ...\n");
229 fprintf(output, "\n");
232 fprintf(output, "Capture interface:\n");
233 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
234 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
235 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
236 fprintf(output, " -p don't capture in promiscuous mode\n");
237 #ifdef HAVE_PCAP_CREATE
238 fprintf(output, " -I capture in monitor mode, if available\n");
240 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
241 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
243 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
244 fprintf(output, " -D print list of interfaces and exit\n");
245 fprintf(output, " -L print list of link-layer types of iface and exit\n");
246 fprintf(output, "\n");
247 fprintf(output, "Capture stop conditions:\n");
248 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
249 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
250 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
251 fprintf(output, " files:NUM - stop after NUM files\n");
252 /*fprintf(output, "\n");*/
253 fprintf(output, "Capture output:\n");
254 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
255 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
256 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
257 #endif /* HAVE_LIBPCAP */
259 /*fprintf(output, "\n");*/
260 fprintf(output, "Input file:\n");
261 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
263 fprintf(output, "\n");
264 fprintf(output, "Processing:\n");
265 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
266 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
267 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
268 fprintf(output, " -d %s ...\n", decode_as_arg_template);
269 fprintf(output, " \"Decode As\", see the man page for details\n");
270 fprintf(output, " Example: tcp.port==8888,http\n");
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Output:\n");
274 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
275 fprintf(output, " (or to the standard output for \"-\")\n");
276 fprintf(output, " -C <config profile> start with specified configuration profile\n");
277 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
278 fprintf(output, " an empty \"-F\" option will list the file types\n");
279 fprintf(output, " -V add output of packet tree (Packet Details)\n");
280 fprintf(output, " -S display packets even when writing to a file\n");
281 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
282 fprintf(output, " -T pdml|ps|psml|text|fields\n");
283 fprintf(output, " format of text output (def: text)\n");
284 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
285 fprintf(output, " this option can be repeated to print multiple fields\n");
286 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
287 fprintf(output, " header=y|n switch headers on and off\n");
288 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
289 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
290 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
291 fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n");
292 fprintf(output, " -l flush standard output after each packet\n");
293 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
294 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
295 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
297 fprintf(output, "\n");
298 fprintf(output, "Miscellaneous:\n");
299 fprintf(output, " -h display this help and exit\n");
300 fprintf(output, " -v display version info and exit\n");
301 fprintf(output, " -o <name>:<value> ... override preference setting\n");
302 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
306 * For a dissector table, print on the stream described by output,
307 * its short name (which is what's used in the "-d" option) and its
311 display_dissector_table_names(const char *table_name, const char *ui_name,
314 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
318 * For a dissector handle, print on the stream described by output,
319 * the filter name (which is what's used in the "-d" option) and the full
320 * name for the protocol that corresponds to this handle.
323 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
326 const gchar* proto_filter_name;
327 const gchar* proto_ui_name;
329 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
331 if (proto_id != -1) {
332 proto_filter_name = proto_get_protocol_filter_name(proto_id);
333 proto_ui_name = proto_get_protocol_name(proto_id);
334 g_assert(proto_filter_name != NULL);
335 g_assert(proto_ui_name != NULL);
337 fprintf((FILE *)output, "\t%s (%s)\n",
344 * The protocol_name_search structure is used by find_protocol_name_func()
345 * to pass parameters and store results
347 struct protocol_name_search{
348 gchar *searched_name; /* Protocol filter name we are looking for */
349 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
350 guint nb_match; /* How many dissectors matched searched_name */
352 typedef struct protocol_name_search *protocol_name_search_t;
355 * This function parses all dissectors associated with a table to find the
356 * one whose protocol has the specified filter name. It is called
357 * as a reference function in a call to dissector_table_foreach_handle.
358 * The name we are looking for, as well as the results, are stored in the
359 * protocol_name_search struct pointed to by user_data.
360 * If called using dissector_table_foreach_handle, we actually parse the
361 * whole list of dissectors.
364 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
368 const gchar *protocol_filter_name;
369 protocol_name_search_t search_info;
373 search_info = (protocol_name_search_t)user_data;
375 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
376 if (proto_id != -1) {
377 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
378 g_assert(protocol_filter_name != NULL);
379 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
381 if (search_info->nb_match == 0) {
382 /* Record this handle only if this is the first match */
383 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
385 search_info->nb_match++;
391 * Print all layer type names supported.
392 * We send the output to the stream described by the handle output.
396 fprint_all_layer_types(FILE *output)
399 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
403 * Print all protocol names supported for a specific layer type.
404 * table_name contains the layer type name in which the search is performed.
405 * We send the output to the stream described by the handle output.
409 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
412 dissector_table_foreach_handle(table_name,
413 display_dissector_names,
418 * The function below parses the command-line parameters for the decode as
419 * feature (a string pointer by cl_param).
420 * It checks the format of the command-line, searches for a matching table
421 * and dissector. If a table/dissector match is not found, we display a
422 * summary of the available tables/dissectors (on stderr) and return FALSE.
423 * If everything is fine, we get the "Decode as" preference activated,
424 * then we return TRUE.
427 add_decode_as(const gchar *cl_param)
431 gchar *decoded_param;
432 gchar *remaining_param;
434 gchar *dissector_str;
435 dissector_handle_t dissector_matching;
436 dissector_table_t table_matching;
437 ftenum_t dissector_table_selector_type;
438 struct protocol_name_search user_protocol_name;
440 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
443 decoded_param = g_strdup(cl_param);
444 g_assert(decoded_param);
447 /* The lines below will parse this string (modifying it) to extract all
448 necessary information. Note that decoded_param is still needed since
449 strings are not copied - we just save pointers. */
451 /* This section extracts a layer type (table_name) from decoded_param */
452 table_name = decoded_param; /* Layer type string starts from beginning */
454 remaining_param = strchr(table_name, '=');
455 if (remaining_param == NULL) {
456 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
457 /* If the argument does not follow the template, carry on anyway to check
458 if the table name is at least correct. If remaining_param is NULL,
459 we'll exit anyway further down */
462 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
465 /* Remove leading and trailing spaces from the table name */
466 while ( table_name[0] == ' ' )
468 while ( table_name[strlen(table_name) - 1] == ' ' )
469 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
471 /* The following part searches a table matching with the layer type specified */
472 table_matching = NULL;
474 /* Look for the requested table */
475 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
476 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
479 table_matching = find_dissector_table(table_name);
480 if (!table_matching) {
481 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
485 if (!table_matching) {
486 /* Display a list of supported layer types to help the user, if the
487 specified layer type was not found */
488 cmdarg_err("Valid layer types are:");
489 fprint_all_layer_types(stderr);
491 if (remaining_param == NULL || !table_matching) {
492 /* Exit if the layer type was not found, or if no '=' separator was found
494 g_free(decoded_param);
498 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
499 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
502 remaining_param++; /* Move to the second '=' */
503 *remaining_param = '\0'; /* Remove the second '=' */
505 remaining_param++; /* Position after the layer type string */
507 /* This section extracts a selector value (selector_str) from decoded_param */
509 selector_str = remaining_param; /* Next part starts with the selector number */
511 remaining_param = strchr(selector_str, ',');
512 if (remaining_param == NULL) {
513 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
514 /* If the argument does not follow the template, carry on anyway to check
515 if the selector value is at least correct. If remaining_param is NULL,
516 we'll exit anyway further down */
519 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
522 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
524 switch (dissector_table_selector_type) {
530 /* The selector for this table is an unsigned number. Parse it as such.
531 There's no need to remove leading and trailing spaces from the
532 selector number string, because sscanf will do that for us. */
533 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
534 cmdarg_err("Invalid selector number \"%s\"", selector_str);
535 g_free(decoded_param);
543 /* The selector for this table is a string. */
547 /* There are currently no dissector tables with any types other
548 than the ones listed above. */
549 g_assert_not_reached();
552 if (remaining_param == NULL) {
553 /* Exit if no ',' separator was found (see above) */
554 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
555 fprint_all_protocols_for_layer_types(stderr, table_name);
556 g_free(decoded_param);
560 remaining_param++; /* Position after the selector number string */
562 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
564 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
566 /* Remove leading and trailing spaces from the dissector name */
567 while ( dissector_str[0] == ' ' )
569 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
570 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
572 dissector_matching = NULL;
574 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
575 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 */
576 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
579 user_protocol_name.nb_match = 0;
580 user_protocol_name.searched_name = dissector_str;
581 user_protocol_name.matched_handle = NULL;
583 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 */
585 if (user_protocol_name.nb_match != 0) {
586 dissector_matching = user_protocol_name.matched_handle;
587 if (user_protocol_name.nb_match > 1) {
588 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
592 /* OK, check whether the problem is that there isn't any such
593 protocol, or that there is but it's not specified as a protocol
594 that's valid for that dissector table.
595 Note, we don't exit here, but dissector_matching will remain NULL,
597 if (proto_get_id_by_filter_name(dissector_str) == -1) {
598 /* No such protocol */
599 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
601 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
602 dissector_str, table_name);
607 if (!dissector_matching) {
608 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
609 fprint_all_protocols_for_layer_types(stderr, table_name);
610 g_free(decoded_param);
614 /* This is the end of the code that parses the command-line options.
615 All information is now stored in the variables:
619 The above variables that are strings are still pointing to areas within
620 decoded_parm. decoded_parm thus still needs to be kept allocated in
621 until we stop needing these variables
622 decoded_param will be deallocated at each exit point of this function */
625 /* We now have a pointer to the handle for the requested dissector
626 (requested protocol) inside the variable dissector_matching */
627 switch (dissector_table_selector_type) {
633 /* The selector for this table is an unsigned number. */
634 dissector_change(table_name, selector, dissector_matching);
640 /* The selector for this table is a string. */
641 dissector_change_string(table_name, selector_str, dissector_matching);
645 /* There are currently no dissector tables with any types other
646 than the ones listed above. */
647 g_assert_not_reached();
649 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
654 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
655 const gchar *message, gpointer user_data)
657 /* ignore log message, if log_level isn't interesting based
658 upon the console log preferences.
659 If the preferences haven't been loaded loaded yet, display the
662 The default console_log_level preference value is such that only
663 ERROR, CRITICAL and WARNING level messages are processed;
664 MESSAGE, INFO and DEBUG level messages are ignored.
666 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
667 ERROR and CRITICAL level messages so the current code is a behavioral
668 change. The current behavior is the same as in Wireshark.
670 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
671 prefs.console_log_level != 0) {
675 g_log_default_handler(log_domain, log_level, message, user_data);
680 output_file_description(const char *fname)
682 char *save_file_string;
684 /* Get a string that describes what we're writing to */
685 if (strcmp(fname, "-") == 0) {
686 /* We're writing to the standard output */
687 save_file_string = g_strdup("standard output");
689 /* We're writing to a file with the name in save_file */
690 save_file_string = g_strdup_printf("file \"%s\"", fname);
692 return save_file_string;
696 print_current_user(void) {
697 gchar *cur_user, *cur_group;
698 if (started_with_special_privs()) {
699 cur_user = get_cur_username();
700 cur_group = get_cur_groupname();
701 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
702 cur_user, cur_group);
705 if (running_with_special_privs()) {
706 fprintf(stderr, " This could be dangerous.");
708 fprintf(stderr, "\n");
713 check_capture_privs(void) {
716 /* Warn the user if npf.sys isn't loaded. */
717 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
718 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
719 "capturing or\nlisting interfaces.\n");
725 show_version(GString *comp_info_str, GString *runtime_info_str)
727 printf("TShark " VERSION "%s\n"
734 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
735 runtime_info_str->str);
739 main(int argc, char *argv[])
741 char *init_progfile_dir_error;
743 gboolean arg_error = FALSE;
749 char *gpf_path, *pf_path;
750 char *gdp_path, *dp_path;
751 int gpf_open_errno, gpf_read_errno;
752 int pf_open_errno, pf_read_errno;
753 int gdp_open_errno, gdp_read_errno;
754 int dp_open_errno, dp_read_errno;
757 gboolean list_link_layer_types = FALSE;
758 gboolean start_capture = FALSE;
763 gboolean capture_option_specified = FALSE;
765 gboolean quiet = FALSE;
766 int out_file_type = WTAP_FILE_PCAP;
767 gchar *cf_name = NULL, *rfilter = NULL;
768 #ifdef HAVE_PCAP_OPEN_DEAD
769 struct bpf_program fcode;
771 dfilter_t *rfcode = NULL;
774 GLogLevelFlags log_flags;
778 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
779 #define OPTSTRING_B "B:"
781 #define OPTSTRING_B ""
782 #endif /* _WIN32 or HAVE_PCAP_CREATE */
783 #else /* HAVE_LIBPCAP */
784 #define OPTSTRING_B ""
785 #endif /* HAVE_LIBPCAP */
787 #ifdef HAVE_PCAP_CREATE
788 #define OPTSTRING_I "I"
790 #define OPTSTRING_I ""
793 #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:"
795 static const char optstring[] = OPTSTRING;
798 * Get credential information for later use.
800 get_credential_info();
803 * Attempt to get the pathname of the executable file.
805 init_progfile_dir_error = init_progfile_dir(argv[0], main);
806 if (init_progfile_dir_error != NULL) {
807 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
808 init_progfile_dir_error);
812 * In order to have the -X opts assigned before the wslua machine starts
813 * we need to call getopts before epan_init() gets called.
816 optind_initial = optind;
818 while ((opt = getopt(argc, argv, optstring)) != -1) {
820 case 'C': /* Configuration Profile */
821 if (profile_exists (optarg)) {
822 set_profile_name (optarg);
824 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
836 optind = optind_initial;
841 /** Send All g_log messages to our own handler **/
845 G_LOG_LEVEL_CRITICAL|
850 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
852 g_log_set_handler(NULL,
854 tshark_log_handler, NULL /* user_data */);
855 g_log_set_handler(LOG_DOMAIN_MAIN,
857 tshark_log_handler, NULL /* user_data */);
860 g_log_set_handler(LOG_DOMAIN_CAPTURE,
862 tshark_log_handler, NULL /* user_data */);
863 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
865 tshark_log_handler, NULL /* user_data */);
868 initialize_funnel_ops();
871 capture_opts_init(&global_capture_opts, &cfile);
874 timestamp_set_type(TS_RELATIVE);
875 timestamp_set_precision(TS_PREC_AUTO);
876 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
878 /* Register all dissectors; we must do this before checking for the
879 "-G" flag, as the "-G" flag dumps information registered by the
880 dissectors, and we must do it before we read the preferences, in
881 case any dissectors register preferences. */
882 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
883 failure_message, open_failure_message, read_failure_message,
884 write_failure_message);
886 /* Register all tap listeners; we do this before we parse the arguments,
887 as the "-z" argument can specify a registered tap. */
889 /* we register the plugin taps before the other taps because
890 stats_tree taps plugins will be registered as tap listeners
891 by stats_tree_stat.c and need to registered before that */
893 register_all_plugin_tap_listeners();
895 register_all_tap_listeners();
897 /* Now register the preferences for any non-dissector modules.
898 We must do that before we read the preferences as well. */
899 prefs_register_modules();
901 /* If invoked with the "-G" flag, we dump out information based on
902 the argument to the "-G" flag; if no argument is specified,
903 for backwards compatibility we dump out a glossary of display
906 XXX - we do this here, for now, to support "-G" with no arguments.
907 If none of our build or other processes uses "-G" with no arguments,
908 we can just process it with the other arguments. */
909 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
910 proto_initialize_all_prefixes();
913 proto_registrar_dump_fields(1);
915 if (strcmp(argv[2], "fields") == 0)
916 proto_registrar_dump_fields(1);
917 else if (strcmp(argv[2], "fields2") == 0)
918 proto_registrar_dump_fields(2);
919 else if (strcmp(argv[2], "fields3") == 0)
920 proto_registrar_dump_fields(3);
921 else if (strcmp(argv[2], "protocols") == 0)
922 proto_registrar_dump_protocols();
923 else if (strcmp(argv[2], "values") == 0)
924 proto_registrar_dump_values();
925 else if (strcmp(argv[2], "decodes") == 0)
926 dissector_dump_decodes();
927 else if (strcmp(argv[2], "defaultprefs") == 0)
929 else if (strcmp(argv[2], "currentprefs") == 0) {
930 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
931 &pf_open_errno, &pf_read_errno, &pf_path);
934 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
941 /* Set the C-language locale to the native environment. */
942 setlocale(LC_ALL, "");
944 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
945 &pf_open_errno, &pf_read_errno, &pf_path);
946 if (gpf_path != NULL) {
947 if (gpf_open_errno != 0) {
948 cmdarg_err("Can't open global preferences file \"%s\": %s.",
949 pf_path, strerror(gpf_open_errno));
951 if (gpf_read_errno != 0) {
952 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
953 pf_path, strerror(gpf_read_errno));
956 if (pf_path != NULL) {
957 if (pf_open_errno != 0) {
958 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
959 strerror(pf_open_errno));
961 if (pf_read_errno != 0) {
962 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
963 pf_path, strerror(pf_read_errno));
969 /* Set the name resolution code's flags from the preferences. */
970 g_resolv_flags = prefs_p->name_resolve;
972 /* Read the disabled protocols file. */
973 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
974 &dp_path, &dp_open_errno, &dp_read_errno);
975 if (gdp_path != NULL) {
976 if (gdp_open_errno != 0) {
977 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
978 gdp_path, strerror(gdp_open_errno));
980 if (gdp_read_errno != 0) {
981 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
982 gdp_path, strerror(gdp_read_errno));
986 if (dp_path != NULL) {
987 if (dp_open_errno != 0) {
989 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
990 strerror(dp_open_errno));
992 if (dp_read_errno != 0) {
994 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
995 strerror(dp_read_errno));
1000 check_capture_privs();
1002 cap_file_init(&cfile);
1004 /* Print format defaults to this. */
1005 print_format = PR_FMT_TEXT;
1007 output_fields = output_fields_new();
1009 /* Now get our args */
1010 while ((opt = getopt(argc, argv, optstring)) != -1) {
1012 case 'a': /* autostop criteria */
1013 case 'b': /* Ringbuffer option */
1014 case 'c': /* Capture x packets */
1015 case 'f': /* capture filter */
1016 case 'i': /* Use interface x */
1017 case 'p': /* Don't capture in promiscuous mode */
1018 #ifdef HAVE_PCAP_CREATE
1019 case 'I': /* Capture in monitor mode, if available */
1021 case 's': /* Set the snapshot (capture) length */
1022 case 'w': /* Write to capture file x */
1023 case 'y': /* Set the pcap data link type */
1024 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1025 case 'B': /* Buffer size */
1026 #endif /* _WIN32 or HAVE_PCAP_CREATE */
1028 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1033 capture_option_specified = TRUE;
1038 /* Configuration profile settings were already processed just ignore them this time*/
1040 case 'd': /* Decode as rule */
1041 if (!add_decode_as(optarg))
1044 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1045 case 'K': /* Kerberos keytab file */
1046 read_keytab_file(optarg);
1049 case 'D': /* Print a list of capture devices and exit */
1051 if_list = capture_interface_list(&err, &err_str);
1052 if (if_list == NULL) {
1054 case CANT_GET_INTERFACE_LIST:
1055 cmdarg_err("%s", err_str);
1059 case NO_INTERFACES_FOUND:
1060 cmdarg_err("There are no interfaces on which a capture can be done");
1065 capture_opts_print_interfaces(if_list);
1066 free_interface_list(if_list);
1069 capture_option_specified = TRUE;
1075 output_fields_add(output_fields, optarg);
1079 if(!output_fields_set_option(output_fields, optarg)) {
1080 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1081 output_fields_list_options(stderr);
1086 out_file_type = wtap_short_string_to_file_type(optarg);
1087 if (out_file_type < 0) {
1088 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1089 list_capture_types();
1093 case 'h': /* Print help and exit */
1097 case 'l': /* "Line-buffer" standard output */
1098 /* This isn't line-buffering, strictly speaking, it's just
1099 flushing the standard output after the information for
1100 each packet is printed; however, that should be good
1101 enough for all the purposes to which "-l" is put (and
1102 is probably actually better for "-V", as it does fewer
1105 See the comment in "process_packet()" for an explanation of
1106 why we do that, and why we don't just use "setvbuf()" to
1107 make the standard output line-buffered (short version: in
1108 Windows, "line-buffered" is the same as "fully-buffered",
1109 and the output buffer is only flushed when it fills up). */
1110 line_buffered = TRUE;
1112 case 'L': /* Print list of link-layer types and exit */
1114 list_link_layer_types = TRUE;
1116 capture_option_specified = TRUE;
1120 #if GLIB_CHECK_VERSION(2,10,0)
1121 case 'P': /* Perform two pass analysis */
1122 perform_two_pass_analysis = TRUE;
1125 case 'n': /* No name resolution */
1126 g_resolv_flags = RESOLV_NONE;
1128 case 'N': /* Select what types of addresses/port #s to resolve */
1129 if (g_resolv_flags == RESOLV_ALL)
1130 g_resolv_flags = RESOLV_NONE;
1131 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1132 if (badopt != '\0') {
1133 cmdarg_err("-N specifies unknown resolving option '%c';",
1135 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1139 case 'o': /* Override preference from command line */
1140 switch (prefs_set_pref(optarg)) {
1145 case PREFS_SET_SYNTAX_ERR:
1146 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1150 case PREFS_SET_NO_SUCH_PREF:
1151 case PREFS_SET_OBSOLETE:
1152 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1157 case 'q': /* Quiet */
1160 case 'r': /* Read capture file x */
1161 cf_name = g_strdup(optarg);
1163 case 'R': /* Read file filter */
1166 case 'S': /* show packets in real time */
1167 print_packet_info = TRUE;
1169 case 't': /* Time stamp type */
1170 if (strcmp(optarg, "r") == 0)
1171 timestamp_set_type(TS_RELATIVE);
1172 else if (strcmp(optarg, "a") == 0)
1173 timestamp_set_type(TS_ABSOLUTE);
1174 else if (strcmp(optarg, "ad") == 0)
1175 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1176 else if (strcmp(optarg, "d") == 0)
1177 timestamp_set_type(TS_DELTA);
1178 else if (strcmp(optarg, "dd") == 0)
1179 timestamp_set_type(TS_DELTA_DIS);
1180 else if (strcmp(optarg, "e") == 0)
1181 timestamp_set_type(TS_EPOCH);
1183 cmdarg_err("Invalid time stamp type \"%s\"",
1185 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1186 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1190 case 'T': /* printing Type */
1191 if (strcmp(optarg, "text") == 0) {
1192 output_action = WRITE_TEXT;
1193 print_format = PR_FMT_TEXT;
1194 } else if (strcmp(optarg, "ps") == 0) {
1195 output_action = WRITE_TEXT;
1196 print_format = PR_FMT_PS;
1197 } else if (strcmp(optarg, "pdml") == 0) {
1198 output_action = WRITE_XML;
1200 } else if (strcmp(optarg, "psml") == 0) {
1201 output_action = WRITE_XML;
1203 } else if(strcmp(optarg, "fields") == 0) {
1204 output_action = WRITE_FIELDS;
1205 verbose = TRUE; /* Need full tree info */
1207 cmdarg_err("Invalid -T parameter.");
1208 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1212 case 'u': /* Seconds type */
1213 if (strcmp(optarg, "s") == 0)
1214 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1215 else if (strcmp(optarg, "hms") == 0)
1216 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1218 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1219 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1223 case 'v': /* Show version and exit */
1225 GString *comp_info_str;
1226 GString *runtime_info_str;
1227 /* Assemble the compile-time version information string */
1228 comp_info_str = g_string_new("Compiled ");
1229 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1231 /* Assemble the run-time version information string */
1232 runtime_info_str = g_string_new("Running ");
1233 get_runtime_version_info(runtime_info_str, NULL);
1234 show_version(comp_info_str, runtime_info_str);
1235 g_string_free(comp_info_str, TRUE);
1236 g_string_free(runtime_info_str, TRUE);
1240 case 'V': /* Verbose */
1242 /* The user asked for a verbose output, so let's ensure they get it,
1243 * even if they're writing to a file.
1245 print_packet_info = TRUE;
1247 case 'x': /* Print packet data in hex (and ASCII) */
1249 /* The user asked for hex output, so let's ensure they get it,
1250 * even if they're writing to a file.
1252 print_packet_info = TRUE;
1257 /* We won't call the init function for the stat this soon
1258 as it would disallow MATE's fields (which are registered
1259 by the preferences set callback) from being used as
1260 part of a tap filter. Instead, we just add the argument
1261 to a list of stat arguments. */
1262 if (!process_stat_cmd_arg(optarg)) {
1263 cmdarg_err("invalid -z argument.");
1264 cmdarg_err_cont(" -z argument must be one of :");
1265 list_stat_cmd_args();
1270 case '?': /* Bad flag - print usage message */
1273 list_capture_types();
1283 /* If we specified output fields, but not the output field type... */
1284 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1285 cmdarg_err("Output fields were specified with \"-e\", "
1286 "but \"-Tfields\" was not specified.");
1288 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1289 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1290 "specified with \"-e\".");
1295 /* If no capture filter or read filter has been specified, and there are
1296 still command-line arguments, treat them as the tokens of a capture
1297 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1298 flag was specified. */
1299 if (optind < argc) {
1300 if (cf_name != NULL) {
1301 if (rfilter != NULL) {
1302 cmdarg_err("Read filters were specified both with \"-R\" "
1303 "and with additional command-line arguments");
1306 rfilter = get_args_as_string(argc, argv, optind);
1309 if (global_capture_opts.has_cfilter) {
1310 cmdarg_err("Capture filters were specified both with \"-f\""
1311 " and with additional command-line arguments");
1314 global_capture_opts.has_cfilter = TRUE;
1315 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1317 capture_option_specified = TRUE;
1323 if (!global_capture_opts.saving_to_file) {
1324 /* We're not saving the capture to a file; if "-q" wasn't specified,
1325 we should print packet information */
1327 print_packet_info = TRUE;
1329 /* We're saving to a file; if we're writing to the standard output.
1330 and we'll also be writing dissected packets to the standard
1331 output, reject the request. At best, we could redirect that
1332 to the standard error; we *can't* write both to the standard
1333 output and have either of them be useful. */
1334 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1335 cmdarg_err("You can't write both raw packet data and dissected packets"
1336 " to the standard output.");
1341 /* We're not saving the capture to a file; if "-q" wasn't specified,
1342 we should print packet information */
1344 print_packet_info = TRUE;
1347 #ifndef HAVE_LIBPCAP
1348 if (capture_option_specified)
1349 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1356 /* We don't support capture filters when reading from a capture file
1357 (the BPF compiler doesn't support all link-layer types that we
1358 support in capture files we read). */
1360 if (cf_name != NULL) {
1361 if (global_capture_opts.has_cfilter) {
1362 cmdarg_err("Only read filters, not capture filters, "
1363 "can be specified when reading a capture file.");
1370 if (output_action != WRITE_TEXT) {
1371 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1377 if (list_link_layer_types) {
1378 /* We're supposed to list the link-layer types for an interface;
1379 did the user also specify a capture file to be read? */
1381 /* Yes - that's bogus. */
1382 cmdarg_err("You can't specify -L and a capture file to be read.");
1385 /* No - did they specify a ring buffer option? */
1386 if (global_capture_opts.multi_files_on) {
1387 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1393 * "-r" was specified, so we're reading a capture file.
1394 * Capture options don't apply here.
1396 if (global_capture_opts.multi_files_on) {
1397 cmdarg_err("Multiple capture files requested, but "
1398 "a capture isn't being done.");
1401 if (global_capture_opts.has_file_duration) {
1402 cmdarg_err("Switching capture files after a time interval was specified, but "
1403 "a capture isn't being done.");
1406 if (global_capture_opts.has_ring_num_files) {
1407 cmdarg_err("A ring buffer of capture files was specified, but "
1408 "a capture isn't being done.");
1411 if (global_capture_opts.has_autostop_files) {
1412 cmdarg_err("A maximum number of capture files was specified, but "
1413 "a capture isn't being done.");
1417 /* Note: TShark now allows the restriction of a _read_ file by packet count
1418 * and byte count as well as a write file. Other autostop options remain valid
1419 * only for a write file.
1421 if (global_capture_opts.has_autostop_duration) {
1422 cmdarg_err("A maximum capture time was specified, but "
1423 "a capture isn't being done.");
1428 * "-r" wasn't specified, so we're doing a live capture.
1430 if (global_capture_opts.saving_to_file) {
1431 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1433 /* When capturing, we only support writing libpcap format. */
1434 if (out_file_type != WTAP_FILE_PCAP) {
1435 cmdarg_err("Live captures can only be saved in libpcap format.");
1438 if (global_capture_opts.multi_files_on) {
1439 /* Multiple-file mode doesn't work under certain conditions:
1440 a) it doesn't work if you're writing to the standard output;
1441 b) it doesn't work if you're writing to a pipe;
1443 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1444 cmdarg_err("Multiple capture files requested, but "
1445 "the capture is being written to the standard output.");
1448 if (global_capture_opts.output_to_pipe) {
1449 cmdarg_err("Multiple capture files requested, but "
1450 "the capture file is a pipe.");
1453 if (!global_capture_opts.has_autostop_filesize &&
1454 !global_capture_opts.has_file_duration) {
1455 cmdarg_err("Multiple capture files requested, but "
1456 "no maximum capture file size or duration was specified.");
1461 /* They didn't specify a "-w" flag, so we won't be saving to a
1462 capture file. Check for options that only make sense if
1463 we're saving to a file. */
1464 if (global_capture_opts.has_autostop_filesize) {
1465 cmdarg_err("Maximum capture file size specified, but "
1466 "capture isn't being saved to a file.");
1469 if (global_capture_opts.multi_files_on) {
1470 cmdarg_err("Multiple capture files requested, but "
1471 "the capture isn't being saved to a file.");
1480 /* Start windows sockets */
1481 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1484 /* Notify all registered modules that have had any of their preferences
1485 changed either from one of the preferences file or from the command
1486 line that their preferences have changed. */
1489 /* At this point MATE will have registered its field array so we can
1490 have a tap filter with one of MATE's late-registered fields as part
1491 of the filter. We can now process all the "-z" arguments. */
1492 start_requested_stats();
1494 /* disabled protocols as per configuration file */
1495 if (gdp_path == NULL && dp_path == NULL) {
1496 set_disabled_protos_list();
1499 /* Build the column format array */
1500 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1503 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1504 capture_opts_trim_ring_num_files(&global_capture_opts);
1507 if (rfilter != NULL) {
1508 if (!dfilter_compile(rfilter, &rfcode)) {
1509 cmdarg_err("%s", dfilter_error_msg);
1511 #ifdef HAVE_PCAP_OPEN_DEAD
1515 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1517 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1519 " Note: That display filter code looks like a valid capture filter;");
1521 " maybe you mixed them up?");
1530 cfile.rfcode = rfcode;
1532 if (print_packet_info) {
1533 /* If we're printing as text or PostScript, we have
1534 to create a print stream. */
1535 if (output_action == WRITE_TEXT) {
1536 switch (print_format) {
1539 print_stream = print_stream_text_stdio_new(stdout);
1543 print_stream = print_stream_ps_stdio_new(stdout);
1547 g_assert_not_reached();
1552 /* We have to dissect each packet if:
1554 we're printing information about each packet;
1556 we're using a read filter on the packets;
1558 we're using any taps. */
1559 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1563 * We're reading a capture file.
1567 * Immediately relinquish any special privileges we have; we must not
1568 * be allowed to read any capture files the user running TShark
1571 relinquish_special_privs_perm();
1572 print_current_user();
1574 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1579 /* Set timestamp precision; there should arguably be a command-line
1580 option to let the user set this. */
1581 switch(wtap_file_tsprecision(cfile.wth)) {
1582 case(WTAP_FILE_TSPREC_SEC):
1583 timestamp_set_precision(TS_PREC_AUTO_SEC);
1585 case(WTAP_FILE_TSPREC_DSEC):
1586 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1588 case(WTAP_FILE_TSPREC_CSEC):
1589 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1591 case(WTAP_FILE_TSPREC_MSEC):
1592 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1594 case(WTAP_FILE_TSPREC_USEC):
1595 timestamp_set_precision(TS_PREC_AUTO_USEC);
1597 case(WTAP_FILE_TSPREC_NSEC):
1598 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1601 g_assert_not_reached();
1604 /* Process the packets in the file */
1606 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1607 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1608 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1610 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1617 /* No capture file specified, so we're supposed to do a live capture
1618 (or get a list of link-layer types for a live capture device);
1619 do we have support for live captures? */
1626 cmdarg_err("WinPcap couldn't be found.");
1627 detailed_err = cant_load_winpcap_err("TShark");
1628 cmdarg_err_cont("%s", detailed_err);
1629 g_free(detailed_err);
1634 /* trim the interface name and exit if that failed */
1635 if (!capture_opts_trim_iface(&global_capture_opts,
1636 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1640 /* if requested, list the link layer types and exit */
1641 if (list_link_layer_types) {
1642 /* Get the list of link-layer types for the capture device. */
1643 if_capabilities_t *caps;
1645 caps = capture_get_if_capabilities(global_capture_opts.iface,
1646 global_capture_opts.monitor_mode,
1649 cmdarg_err("%s", err_str);
1653 if (caps->data_link_types == NULL) {
1654 cmdarg_err("The capture device \"%s\" has no data link types.", global_capture_opts.iface);
1657 capture_opts_print_if_capabilities(caps,
1658 global_capture_opts.monitor_mode);
1659 free_if_capabilities(caps);
1663 if (print_packet_info) {
1664 if (!write_preamble(NULL)) {
1666 show_print_file_io_error(err);
1669 } else if (!quiet) {
1671 * We're not printing information for each packet, and the user
1672 * didn't ask us not to print a count of packets as they arrive,
1673 * so print that count so the user knows that packets are arriving.
1675 * XXX - what if the user wants to do a live capture, doesn't want
1676 * to save it to a file, doesn't want information printed for each
1677 * packet, does want some "-z" statistic, and wants packet counts
1678 * so they know whether they're seeing any packets?
1680 print_packet_counts = TRUE;
1683 /* For now, assume libpcap gives microsecond precision. */
1684 timestamp_set_precision(TS_PREC_AUTO_USEC);
1688 if (print_packet_info) {
1689 if (!write_finale()) {
1691 show_print_file_io_error(err);
1695 /* No - complain. */
1696 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1703 #if GLIB_CHECK_VERSION(2,10,0)
1704 if (cfile.plist_start != NULL)
1705 g_slice_free_chain(frame_data, cfile.plist_start, next);
1708 draw_tap_listeners(TRUE);
1709 funnel_dump_all_text_windows();
1712 output_fields_free(output_fields);
1713 output_fields = NULL;
1718 /*#define USE_BROKEN_G_MAIN_LOOP*/
1720 #ifdef USE_BROKEN_G_MAIN_LOOP
1723 gboolean loop_running = FALSE;
1725 guint32 packet_count = 0;
1728 /* XXX - move to the right position / file */
1729 /* read from a pipe (callback) */
1730 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1732 typedef struct pipe_input_tag {
1736 pipe_input_cb_t input_cb;
1737 guint pipe_input_id;
1739 GStaticMutex callback_running;
1743 static pipe_input_t pipe_input;
1746 /* The timer has expired, see if there's stuff to read from the pipe,
1747 if so, do the callback */
1749 pipe_timer_cb(gpointer data)
1753 gboolean result, result1;
1755 pipe_input_t *pipe_input = data;
1756 gint iterations = 0;
1759 g_static_mutex_lock (&pipe_input->callback_running);
1761 /* try to read data from the pipe only 5 times, to avoid blocking */
1762 while(iterations < 5) {
1763 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1765 /* Oddly enough although Named pipes don't work on win9x,
1766 PeekNamedPipe does !!! */
1767 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1768 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1770 /* Get the child process exit status */
1771 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1774 /* If the Peek returned an error, or there are bytes to be read
1775 or the childwatcher thread has terminated then call the normal
1777 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1779 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1781 /* And call the real handler */
1782 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1783 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1784 /* pipe closed, return false so that the timer is stopped */
1785 g_static_mutex_unlock (&pipe_input->callback_running);
1790 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1791 /* No data, stop now */
1798 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1800 g_static_mutex_unlock (&pipe_input->callback_running);
1802 /* we didn't stopped the timer, so let it run */
1809 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1812 pipe_input.source = source;
1813 pipe_input.child_process = child_process;
1814 pipe_input.user_data = user_data;
1815 pipe_input.input_cb = input_cb;
1818 g_static_mutex_init(&pipe_input.callback_running);
1819 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1820 do this but that doesn't cover all win32 platforms. GTK can do
1821 this but doesn't seem to work over processes. Attempt to do
1822 something similar here, start a timer and check for data on every
1824 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1825 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1835 #ifdef USE_TSHARK_SELECT
1839 struct sigaction action, oldaction;
1843 * XXX - dropping privileges is still required, until code cleanup is done
1845 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1846 * when it's done, we don't need special privileges to run tshark at all,
1847 * therefore we don't need to drop these privileges
1848 * The only thing we might want to keep is a warning if tshark is run as root,
1849 * as it's no longer necessary and potentially dangerous.
1851 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1852 * We've opened the capture device, so we shouldn't need any special
1853 * privileges any more; relinquish those privileges.
1855 * XXX - if we have saved set-user-ID support, we should give up those
1856 * privileges immediately, and then reclaim them long enough to get
1857 * a list of network interfaces and to open one, and then give them
1858 * up again, so that stuff we do while processing the argument list,
1859 * reading the user's preferences, loading and starting plugins
1860 * (especially *user* plugins), etc. is done with the user's privileges,
1861 * not special privileges.
1863 relinquish_special_privs_perm();
1864 print_current_user();
1866 /* Cleanup all data structures used for dissection. */
1867 cleanup_dissection();
1868 /* Initialize all data structures used for dissection. */
1872 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1873 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1875 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1877 action.sa_handler = capture_cleanup;
1878 action.sa_flags = 0;
1879 sigemptyset(&action.sa_mask);
1880 sigaction(SIGTERM, &action, NULL);
1881 sigaction(SIGINT, &action, NULL);
1882 sigaction(SIGHUP, NULL, &oldaction);
1883 if (oldaction.sa_handler == SIG_DFL)
1884 sigaction(SIGHUP, &action, NULL);
1887 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1888 quiet mode, report the number of packets we've captured. */
1889 action.sa_handler = report_counts_siginfo;
1890 action.sa_flags = 0;
1891 sigemptyset(&action.sa_mask);
1892 sigaction(SIGINFO, &action, NULL);
1893 #endif /* SIGINFO */
1896 global_capture_opts.state = CAPTURE_PREPARING;
1898 /* Let the user know what interface was chosen. */
1899 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1900 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1902 ret = sync_pipe_start(&global_capture_opts);
1907 /* the actual capture loop
1909 * XXX - glib doesn't seem to provide any event based loop handling.
1911 * XXX - for whatever reason,
1912 * calling g_main_loop_new() ends up in 100% cpu load.
1914 * But that doesn't matter: in UNIX we can use select() to find an input
1915 * source with something to do.
1917 * But that doesn't matter because we're in a CLI (that doesn't need to
1918 * update a GUI or something at the same time) so it's OK if we block
1919 * trying to read from the pipe.
1921 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1922 * wrong (but I leave it there in case I am...).
1925 #ifdef USE_TSHARK_SELECT
1927 FD_SET(pipe_input.source, &readfds);
1930 loop_running = TRUE;
1932 while (loop_running)
1934 #ifdef USE_TSHARK_SELECT
1935 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1941 } else if (ret == 1) {
1943 /* Call the real handler */
1944 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1945 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1948 #ifdef USE_TSHARK_SELECT
1957 /* XXX - move the call to main_window_update() out of capture_sync.c */
1958 /* dummy for capture_sync.c to make linker happy */
1959 void main_window_update(void)
1963 /* capture child detected an error */
1965 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1967 cmdarg_err("%s", error_msg);
1968 cmdarg_err_cont("%s", secondary_error_msg);
1972 /* capture child detected an capture filter related error */
1974 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1976 dfilter_t *rfcode = NULL;
1979 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1981 "Invalid capture filter: \"%s\"!\n"
1983 "That string looks like a valid display filter; however, it isn't a valid\n"
1984 "capture filter (%s).\n"
1986 "Note that display filters and capture filters don't have the same syntax,\n"
1987 "so you can't use most display filter expressions as capture filters.\n"
1989 "See the User's Guide for a description of the capture filter syntax.",
1990 capture_opts->cfilter, error_message);
1991 dfilter_free(rfcode);
1994 "Invalid capture filter: \"%s\"!\n"
1996 "That string isn't a valid capture filter (%s).\n"
1997 "See the User's Guide for a description of the capture filter syntax.",
1998 capture_opts->cfilter, error_message);
2003 /* capture child tells us we have a new (or the first) capture file */
2005 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
2007 gboolean is_tempfile;
2011 if(capture_opts->state == CAPTURE_PREPARING) {
2012 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
2014 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
2016 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
2018 /* free the old filename */
2019 if (capture_opts->save_file != NULL) {
2021 /* we start a new capture file, close the old one (if we had one before) */
2022 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
2023 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
2024 wtap_close(((capture_file *) capture_opts->cf)->wth);
2026 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
2029 g_free(capture_opts->save_file);
2030 is_tempfile = FALSE;
2032 /* we didn't had a save_file before, must be a tempfile */
2036 /* save the new filename */
2037 capture_opts->save_file = g_strdup(new_file);
2039 /* if we are in real-time mode, open the new file now */
2041 /* Attempt to open the capture file and set up to read from it. */
2042 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
2046 /* Don't unlink (delete) the save file - leave it around,
2047 for debugging purposes. */
2048 g_free(capture_opts->save_file);
2049 capture_opts->save_file = NULL;
2054 capture_opts->state = CAPTURE_RUNNING;
2060 /* capture child tells us we have new packets to read */
2062 capture_input_new_packets(capture_options *capture_opts, int to_read)
2068 capture_file *cf = capture_opts->cf;
2069 gboolean filtering_tap_listeners;
2074 * Prevent a SIGINFO handler from writing to stdout while we're
2075 * doing so; instead, have it just set a flag telling us to print
2076 * that information when we're done.
2079 #endif /* SIGINFO */
2081 /* Do we have any tap listeners with filters? */
2082 filtering_tap_listeners = have_filtering_tap_listeners();
2084 /* Get the union of the flags for all tap listeners. */
2085 tap_flags = union_of_tap_listener_flags();
2088 while (to_read-- && cf->wth) {
2089 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2091 /* read from file failed, tell the capture child to stop */
2092 sync_pipe_stop(capture_opts);
2093 wtap_close(cf->wth);
2096 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2097 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2098 filtering_tap_listeners, tap_flags);
2101 /* packet sucessfully read and gone through the "Read Filter" */
2107 * Dumpcap's doing all the work; we're not doing any dissection.
2108 * Count all the packets it wrote.
2110 packet_count += to_read;
2113 if (print_packet_counts) {
2114 /* We're printing packet counts. */
2115 if (packet_count != 0) {
2116 fprintf(stderr, "\r%u ", packet_count);
2117 /* stderr could be line buffered */
2124 * Allow SIGINFO handlers to write.
2129 * If a SIGINFO handler asked us to write out capture counts, do so.
2133 #endif /* SIGINFO */
2139 if (!print_packet_counts) {
2140 /* Report the count only if we aren't printing a packet count
2141 as packets arrive. */
2142 fprintf(stderr, "%u packet%s captured\n", packet_count,
2143 plurality(packet_count, "", "s"));
2146 infoprint = FALSE; /* we just reported it */
2147 #endif /* SIGINFO */
2152 report_counts_siginfo(int signum _U_)
2154 int sav_errno = errno;
2155 /* If we've been told to delay printing, just set a flag asking
2156 that we print counts (if we're supposed to), otherwise print
2157 the count of packets captured (if we're supposed to). */
2164 #endif /* SIGINFO */
2167 /* capture child detected any packet drops? */
2169 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2171 if (print_packet_counts) {
2172 /* We're printing packet counts to stderr.
2173 Send a newline so that we move to the line after the packet count. */
2174 fprintf(stderr, "\n");
2178 /* We're printing packet counts to stderr.
2179 Send a newline so that we move to the line after the packet count. */
2180 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2185 /* capture child closed its side of the pipe, do the required cleanup */
2187 capture_input_closed(capture_options *capture_opts)
2191 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2192 wtap_close(((capture_file *) capture_opts->cf)->wth);
2194 #ifdef USE_BROKEN_G_MAIN_LOOP
2195 /*g_main_loop_quit(loop);*/
2198 loop_running = FALSE;
2207 capture_cleanup(DWORD ctrltype _U_)
2209 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2210 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2211 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2212 like SIGTERM at least when the machine's shutting down.
2214 For now, we handle them all as indications that we should clean up
2215 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2218 However, as handlers run in a new thread, we can't just longjmp
2219 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2220 no other handler - such as one that would terminate the process -
2223 XXX - for some reason, typing ^C to TShark, if you run this in
2224 a Cygwin console window in at least some versions of Cygwin,
2225 causes TShark to terminate immediately; this routine gets
2226 called, but the main loop doesn't get a chance to run and
2227 exit cleanly, at least if this is compiled with Microsoft Visual
2228 C++ (i.e., it's a property of the Cygwin console window or Bash;
2229 it happens if TShark is not built with Cygwin - for all I know,
2230 building it with Cygwin may make the problem go away). */
2232 /* tell the capture child to stop */
2233 sync_pipe_stop(&global_capture_opts);
2235 /* don't stop our own loop already here, otherwise status messages and
2236 * cleanup wouldn't be done properly. The child will indicate the stop of
2237 * everything by calling capture_input_closed() later */
2243 capture_cleanup(int signum _U_)
2245 /* tell the capture child to stop */
2246 sync_pipe_stop(&global_capture_opts);
2249 #endif /* HAVE_LIBPCAP */
2251 #if GLIB_CHECK_VERSION(2,10,0)
2253 process_packet_first_pass(capture_file *cf,
2254 gint64 offset, const struct wtap_pkthdr *whdr,
2255 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2257 frame_data *fdata = g_slice_new(frame_data);
2261 /* Count this packet. */
2264 /* If we're not running a display filter and we're not printing any
2265 packet information, we don't need to do a dissection. This means
2266 that all packets can be marked as 'passed'. */
2269 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2271 /* If we're going to print packet information, or we're going to
2272 run a read filter, or we're going to process taps, set up to
2273 do a dissection and do so. */
2274 if (do_dissection) {
2276 /* Grab any resolved addresses */
2277 host_name_lookup_process(NULL);
2279 /* The protocol tree will be "visible", i.e., printed, only if we're
2280 printing packet details, which is true if we're printing stuff
2281 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2283 epan_dissect_init(&edt, FALSE, FALSE);
2285 /* If we're running a read filter, prime the epan_dissect_t with that
2288 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2290 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2291 &first_ts, &prev_dis_ts, &prev_cap_ts);
2293 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2295 /* Run the read filter if we have one. */
2297 passed = dfilter_apply_edt(cf->rfcode, &edt);
2301 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2302 cap_file_add_fdata(cf, fdata);
2305 g_slice_free(frame_data, fdata);
2308 epan_dissect_cleanup(&edt);
2314 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2315 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2316 gboolean filtering_tap_listeners, guint tap_flags)
2318 gboolean create_proto_tree;
2323 /* If we're not running a display filter and we're not printing any
2324 packet information, we don't need to do a dissection. This means
2325 that all packets can be marked as 'passed'. */
2328 /* If we're going to print packet information, or we're going to
2329 run a read filter, or we're going to process taps, set up to
2330 do a dissection and do so. */
2331 if (do_dissection) {
2333 /* Grab any resolved addresses */
2334 host_name_lookup_process(NULL);
2336 if (cf->rfcode || verbose || filtering_tap_listeners ||
2337 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2338 create_proto_tree = TRUE;
2340 create_proto_tree = FALSE;
2342 /* The protocol tree will be "visible", i.e., printed, only if we're
2343 printing packet details, which is true if we're printing stuff
2344 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2346 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2348 /* If we're running a read filter, prime the epan_dissect_t with that
2351 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2353 col_custom_prime_edt(&edt, &cf->cinfo);
2355 tap_queue_init(&edt);
2357 /* We only need the columns if either
2359 1) some tap needs the columns
2363 2) we're printing packet info but we're *not* verbose; in verbose
2364 mode, we print the protocol tree, not the protocol summary. */
2365 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2370 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2372 tap_push_tapped_queue(&edt);
2374 /* Run the read filter if we have one. */
2376 passed = dfilter_apply_edt(cf->rfcode, &edt);
2380 /* Process this packet. */
2381 if (print_packet_info) {
2382 /* We're printing packet information; print the information for
2385 print_packet(cf, &edt);
2387 print_packet(cf, NULL);
2389 /* The ANSI C standard does not appear to *require* that a line-buffered
2390 stream be flushed to the host environment whenever a newline is
2391 written, it just says that, on such a stream, characters "are
2392 intended to be transmitted to or from the host environment as a
2393 block when a new-line character is encountered".
2395 The Visual C++ 6.0 C implementation doesn't do what is intended;
2396 even if you set a stream to be line-buffered, it still doesn't
2397 flush the buffer at the end of every line.
2399 So, if the "-l" flag was specified, we flush the standard output
2400 at the end of a packet. This will do the right thing if we're
2401 printing packet summary lines, and, as we print the entire protocol
2402 tree for a single packet without waiting for anything to happen,
2403 it should be as good as line-buffered mode if we're printing
2404 protocol trees. (The whole reason for the "-l" flag in either
2405 tcpdump or TShark is to allow the output of a live capture to
2406 be piped to a program or script and to have that script see the
2407 information for the packet as soon as it's printed, rather than
2408 having to wait until a standard I/O buffer fills up. */
2412 if (ferror(stdout)) {
2413 show_print_file_io_error(errno);
2419 if (do_dissection) {
2420 epan_dissect_cleanup(&edt);
2427 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2428 int max_packet_count, gint64 max_byte_count)
2431 int snapshot_length;
2436 char *save_file_string = NULL;
2437 gboolean filtering_tap_listeners;
2440 linktype = wtap_file_encap(cf->wth);
2441 if (save_file != NULL) {
2442 /* Get a string that describes what we're writing to */
2443 save_file_string = output_file_description(save_file);
2445 /* Set up to write to the capture file. */
2446 snapshot_length = wtap_snapshot_length(cf->wth);
2447 if (snapshot_length == 0) {
2448 /* Snapshot length of input file not known. */
2449 snapshot_length = WTAP_MAX_PACKET_SIZE;
2451 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2452 FALSE /* compressed */, &err);
2455 /* We couldn't set up to write to the capture file. */
2458 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2459 cmdarg_err("Capture files can't be written in that format.");
2462 case WTAP_ERR_UNSUPPORTED_ENCAP:
2463 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2464 cmdarg_err("The capture file being read can't be written in "
2468 case WTAP_ERR_CANT_OPEN:
2469 cmdarg_err("The %s couldn't be created for some "
2470 "unknown reason.", save_file_string);
2473 case WTAP_ERR_SHORT_WRITE:
2474 cmdarg_err("A full header couldn't be written to the %s.",
2479 cmdarg_err("The %s could not be created: %s.", save_file_string,
2480 wtap_strerror(err));
2486 if (print_packet_info) {
2487 if (!write_preamble(cf)) {
2489 show_print_file_io_error(err);
2496 /* Do we have any tap listeners with filters? */
2497 filtering_tap_listeners = have_filtering_tap_listeners();
2499 /* Get the union of the flags for all tap listeners. */
2500 tap_flags = union_of_tap_listener_flags();
2502 if (perform_two_pass_analysis) {
2503 #if GLIB_CHECK_VERSION(2,10,0)
2505 int old_max_packet_count = max_packet_count;
2507 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2508 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2509 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2510 /* Stop reading if we have the maximum number of packets;
2511 * When the -c option has not been used, max_packet_count
2512 * starts at 0, which practically means, never stop reading.
2513 * (unless we roll over max_packet_count ?)
2515 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2516 err = 0; /* This is not an error */
2522 /* Close the sequential I/O side, to free up memory it requires. */
2523 wtap_sequential_close(cf->wth);
2525 /* Allow the protocol dissectors to free up memory that they
2526 * don't need after the sequential run-through of the packets. */
2527 postseq_cleanup_all_protocols();
2529 max_packet_count = old_max_packet_count;
2531 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2532 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2533 cf->pd, fdata->cap_len, &err, &err_info)) {
2534 if (process_packet_second_pass(cf, fdata,
2535 &cf->pseudo_header, cf->pd,
2536 filtering_tap_listeners, tap_flags)) {
2537 /* Either there's no read filtering or this packet passed the
2538 filter, so, if we're writing to a capture file, write
2541 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2542 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2544 /* Error writing to a capture file */
2545 show_capture_file_io_error(save_file, err, FALSE);
2546 wtap_dump_close(pdh, &err);
2550 /* Stop reading if we have the maximum number of packets;
2551 * When the -c option has not been used, max_packet_count
2552 * starts at 0, which practically means, never stop reading.
2553 * (unless we roll over max_packet_count ?)
2555 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2556 err = 0; /* This is not an error */
2565 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2566 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2567 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2568 filtering_tap_listeners, tap_flags)) {
2569 /* Either there's no read filtering or this packet passed the
2570 filter, so, if we're writing to a capture file, write
2573 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2574 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2576 /* Error writing to a capture file */
2577 show_capture_file_io_error(save_file, err, FALSE);
2578 wtap_dump_close(pdh, &err);
2582 /* Stop reading if we have the maximum number of packets;
2583 * When the -c option has not been used, max_packet_count
2584 * starts at 0, which practically means, never stop reading.
2585 * (unless we roll over max_packet_count ?)
2587 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2588 err = 0; /* This is not an error */
2596 /* Print a message noting that the read failed somewhere along the line. */
2599 case WTAP_ERR_UNSUPPORTED_ENCAP:
2600 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2601 cf->filename, err_info);
2605 case WTAP_ERR_CANT_READ:
2606 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2610 case WTAP_ERR_SHORT_READ:
2611 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2615 case WTAP_ERR_BAD_RECORD:
2616 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2617 cf->filename, err_info);
2622 cmdarg_err("An error occurred while reading \"%s\": %s.",
2623 cf->filename, wtap_strerror(err));
2626 if (save_file != NULL) {
2627 /* Now close the capture file. */
2628 if (!wtap_dump_close(pdh, &err))
2629 show_capture_file_io_error(save_file, err, TRUE);
2632 if (save_file != NULL) {
2633 /* Now close the capture file. */
2634 if (!wtap_dump_close(pdh, &err))
2635 show_capture_file_io_error(save_file, err, TRUE);
2637 if (print_packet_info) {
2638 if (!write_finale()) {
2640 show_print_file_io_error(err);
2647 wtap_close(cf->wth);
2650 g_free(save_file_string);
2656 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2657 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2658 gboolean filtering_tap_listeners, guint tap_flags)
2661 gboolean create_proto_tree;
2666 /* Count this packet. */
2669 /* If we're not running a display filter and we're not printing any
2670 packet information, we don't need to do a dissection. This means
2671 that all packets can be marked as 'passed'. */
2674 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2676 /* If we're going to print packet information, or we're going to
2677 run a read filter, or we're going to process taps, set up to
2678 do a dissection and do so. */
2679 if (do_dissection) {
2680 if (print_packet_info && g_resolv_flags)
2681 /* Grab any resolved addresses */
2682 host_name_lookup_process(NULL);
2684 if (cf->rfcode || verbose || filtering_tap_listeners ||
2685 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2686 create_proto_tree = TRUE;
2688 create_proto_tree = FALSE;
2690 /* The protocol tree will be "visible", i.e., printed, only if we're
2691 printing packet details, which is true if we're printing stuff
2692 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2694 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2696 /* If we're running a read filter, prime the epan_dissect_t with that
2699 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2701 col_custom_prime_edt(&edt, &cf->cinfo);
2703 tap_queue_init(&edt);
2705 /* We only need the columns if either
2707 1) some tap needs the columns
2711 2) we're printing packet info but we're *not* verbose; in verbose
2712 mode, we print the protocol tree, not the protocol summary. */
2713 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2718 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2719 &first_ts, &prev_dis_ts, &prev_cap_ts);
2721 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2723 tap_push_tapped_queue(&edt);
2725 /* Run the read filter if we have one. */
2727 passed = dfilter_apply_edt(cf->rfcode, &edt);
2731 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2733 /* Process this packet. */
2734 if (print_packet_info) {
2735 /* We're printing packet information; print the information for
2738 print_packet(cf, &edt);
2740 print_packet(cf, NULL);
2742 /* The ANSI C standard does not appear to *require* that a line-buffered
2743 stream be flushed to the host environment whenever a newline is
2744 written, it just says that, on such a stream, characters "are
2745 intended to be transmitted to or from the host environment as a
2746 block when a new-line character is encountered".
2748 The Visual C++ 6.0 C implementation doesn't do what is intended;
2749 even if you set a stream to be line-buffered, it still doesn't
2750 flush the buffer at the end of every line.
2752 So, if the "-l" flag was specified, we flush the standard output
2753 at the end of a packet. This will do the right thing if we're
2754 printing packet summary lines, and, as we print the entire protocol
2755 tree for a single packet without waiting for anything to happen,
2756 it should be as good as line-buffered mode if we're printing
2757 protocol trees. (The whole reason for the "-l" flag in either
2758 tcpdump or TShark is to allow the output of a live capture to
2759 be piped to a program or script and to have that script see the
2760 information for the packet as soon as it's printed, rather than
2761 having to wait until a standard I/O buffer fills up. */
2765 if (ferror(stdout)) {
2766 show_print_file_io_error(errno);
2772 if (do_dissection) {
2773 epan_dissect_cleanup(&edt);
2774 frame_data_cleanup(&fdata);
2780 write_preamble(capture_file *cf)
2782 switch (output_action) {
2785 return print_preamble(print_stream, cf ? cf->filename : NULL);
2789 write_pdml_preamble(stdout);
2791 write_psml_preamble(stdout);
2792 return !ferror(stdout);
2795 write_fields_preamble(output_fields, stdout);
2796 return !ferror(stdout);
2799 g_assert_not_reached();
2805 get_line_buf(size_t len)
2807 static char *line_bufp = NULL;
2808 static size_t line_buf_len = 256;
2809 size_t new_line_buf_len;
2811 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2812 new_line_buf_len *= 2)
2814 if (line_bufp == NULL) {
2815 line_buf_len = new_line_buf_len;
2816 line_bufp = g_malloc(line_buf_len + 1);
2818 if (new_line_buf_len > line_buf_len) {
2819 line_buf_len = new_line_buf_len;
2820 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2827 print_columns(capture_file *cf)
2834 line_bufp = get_line_buf(256);
2837 for (i = 0; i < cf->cinfo.num_cols; i++) {
2838 switch (cf->cinfo.col_fmt[i]) {
2842 * Don't print this if we're doing a live capture from a network
2843 * interface - if we're doing a live capture, you won't be
2844 * able to look at the capture in the future (it's not being
2845 * saved anywhere), so the frame numbers are unlikely to be
2848 * (XXX - it might be nice to be able to save and print at
2849 * the same time, sort of like an "Update list of packets
2850 * in real time" capture in Wireshark.)
2852 if (global_capture_opts.iface != NULL)
2855 column_len = strlen(cf->cinfo.col_data[i]);
2858 line_bufp = get_line_buf(buf_offset + column_len);
2859 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2865 case COL_ABS_DATE_TIME: /* XXX - wider */
2866 column_len = strlen(cf->cinfo.col_data[i]);
2867 if (column_len < 10)
2869 line_bufp = get_line_buf(buf_offset + column_len);
2870 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2876 case COL_DEF_DL_SRC:
2877 case COL_RES_DL_SRC:
2878 case COL_UNRES_DL_SRC:
2879 case COL_DEF_NET_SRC:
2880 case COL_RES_NET_SRC:
2881 case COL_UNRES_NET_SRC:
2882 column_len = strlen(cf->cinfo.col_data[i]);
2883 if (column_len < 12)
2885 line_bufp = get_line_buf(buf_offset + column_len);
2886 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2892 case COL_DEF_DL_DST:
2893 case COL_RES_DL_DST:
2894 case COL_UNRES_DL_DST:
2895 case COL_DEF_NET_DST:
2896 case COL_RES_NET_DST:
2897 case COL_UNRES_NET_DST:
2898 column_len = strlen(cf->cinfo.col_data[i]);
2899 if (column_len < 12)
2901 line_bufp = get_line_buf(buf_offset + column_len);
2902 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2906 column_len = strlen(cf->cinfo.col_data[i]);
2907 line_bufp = get_line_buf(buf_offset + column_len);
2908 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2911 buf_offset += column_len;
2912 if (i != cf->cinfo.num_cols - 1) {
2914 * This isn't the last column, so we need to print a
2915 * separator between this column and the next.
2917 * If we printed a network source and are printing a
2918 * network destination of the same type next, separate
2919 * them with "->"; if we printed a network destination
2920 * and are printing a network source of the same type
2921 * next, separate them with "<-"; otherwise separate them
2924 * We add enough space to the buffer for " <- " or " -> ",
2925 * even if we're only adding " ".
2927 line_bufp = get_line_buf(buf_offset + 4);
2928 switch (cf->cinfo.col_fmt[i]) {
2933 switch (cf->cinfo.col_fmt[i + 1]) {
2938 strcat(line_bufp + buf_offset, " -> ");
2943 strcat(line_bufp + buf_offset, " ");
2949 case COL_DEF_DL_SRC:
2950 case COL_RES_DL_SRC:
2951 case COL_UNRES_DL_SRC:
2952 switch (cf->cinfo.col_fmt[i + 1]) {
2954 case COL_DEF_DL_DST:
2955 case COL_RES_DL_DST:
2956 case COL_UNRES_DL_DST:
2957 strcat(line_bufp + buf_offset, " -> ");
2962 strcat(line_bufp + buf_offset, " ");
2968 case COL_DEF_NET_SRC:
2969 case COL_RES_NET_SRC:
2970 case COL_UNRES_NET_SRC:
2971 switch (cf->cinfo.col_fmt[i + 1]) {
2973 case COL_DEF_NET_DST:
2974 case COL_RES_NET_DST:
2975 case COL_UNRES_NET_DST:
2976 strcat(line_bufp + buf_offset, " -> ");
2981 strcat(line_bufp + buf_offset, " ");
2990 switch (cf->cinfo.col_fmt[i + 1]) {
2995 strcat(line_bufp + buf_offset, " <- ");
3000 strcat(line_bufp + buf_offset, " ");
3006 case COL_DEF_DL_DST:
3007 case COL_RES_DL_DST:
3008 case COL_UNRES_DL_DST:
3009 switch (cf->cinfo.col_fmt[i + 1]) {
3011 case COL_DEF_DL_SRC:
3012 case COL_RES_DL_SRC:
3013 case COL_UNRES_DL_SRC:
3014 strcat(line_bufp + buf_offset, " <- ");
3019 strcat(line_bufp + buf_offset, " ");
3025 case COL_DEF_NET_DST:
3026 case COL_RES_NET_DST:
3027 case COL_UNRES_NET_DST:
3028 switch (cf->cinfo.col_fmt[i + 1]) {
3030 case COL_DEF_NET_SRC:
3031 case COL_RES_NET_SRC:
3032 case COL_UNRES_NET_SRC:
3033 strcat(line_bufp + buf_offset, " <- ");
3038 strcat(line_bufp + buf_offset, " ");
3045 strcat(line_bufp + buf_offset, " ");
3051 return print_line(print_stream, 0, line_bufp);
3055 print_packet(capture_file *cf, epan_dissect_t *edt)
3057 print_args_t print_args;
3060 /* Print the information in the protocol tree. */
3061 switch (output_action) {
3064 print_args.to_file = TRUE;
3065 print_args.format = print_format;
3066 print_args.print_summary = !verbose;
3067 print_args.print_hex = verbose && print_hex;
3068 print_args.print_formfeed = FALSE;
3069 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3071 /* init the packet range */
3072 packet_range_init(&print_args.range);
3074 if (!proto_tree_print(&print_args, edt, print_stream))
3077 /* "print_hex_data()" will put out a leading blank line, as well
3078 as a trailing one; print one here, to separate the packets,
3079 only if "print_hex_data()" won't be called. */
3080 if (!print_line(print_stream, 0, ""))
3086 proto_tree_write_pdml(edt, stdout);
3088 return !ferror(stdout);
3090 proto_tree_write_fields(output_fields, edt, stdout);
3092 return !ferror(stdout);
3095 /* Just fill in the columns. */
3096 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3098 /* Now print them. */
3099 switch (output_action) {
3102 if (!print_columns(cf))
3107 proto_tree_write_psml(edt, stdout);
3108 return !ferror(stdout);
3109 case WRITE_FIELDS: /*No non-verbose "fields" format */
3110 g_assert_not_reached();
3115 if (!print_hex_data(print_stream, edt))
3117 if (!print_line(print_stream, 0, ""))
3126 switch (output_action) {
3129 return print_finale(print_stream);
3133 write_pdml_finale(stdout);
3135 write_psml_finale(stdout);
3136 return !ferror(stdout);
3139 write_fields_finale(output_fields, stdout);
3140 return !ferror(stdout);
3143 g_assert_not_reached();
3149 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3153 char err_msg[2048+1];
3155 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3159 /* The open succeeded. Fill in the information for this file. */
3161 /* Cleanup all data structures used for dissection. */
3162 cleanup_dissection();
3163 /* Initialize all data structures used for dissection. */
3167 cf->f_datalen = 0; /* not used, but set it anyway */
3169 /* Set the file name because we need it to set the follow stream filter.
3170 XXX - is that still true? We need it for other reasons, though,
3172 cf->filename = g_strdup(fname);
3174 /* Indicate whether it's a permanent or temporary file. */
3175 cf->is_tempfile = is_tempfile;
3177 /* If it's a temporary capture buffer file, mark it as not saved. */
3178 cf->user_saved = !is_tempfile;
3180 cf->cd_t = wtap_file_type(cf->wth);
3182 cf->drops_known = FALSE;
3184 cf->snap = wtap_snapshot_length(cf->wth);
3185 if (cf->snap == 0) {
3186 /* Snapshot length not known. */
3187 cf->has_snap = FALSE;
3188 cf->snap = WTAP_MAX_PACKET_SIZE;
3190 cf->has_snap = TRUE;
3191 nstime_set_zero(&cf->elapsed_time);
3192 nstime_set_unset(&first_ts);
3193 nstime_set_unset(&prev_dis_ts);
3194 nstime_set_unset(&prev_cap_ts);
3196 cf->state = FILE_READ_IN_PROGRESS;
3201 g_snprintf(err_msg, sizeof err_msg,
3202 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3203 cmdarg_err("%s", err_msg);
3208 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3210 char *save_file_string;
3212 save_file_string = output_file_description(fname);
3217 cmdarg_err("Not all the packets could be written to the %s because there is "
3218 "no space left on the file system.",
3224 cmdarg_err("Not all the packets could be written to the %s because you are "
3225 "too close to, or over your disk quota.",
3230 case WTAP_ERR_CANT_CLOSE:
3231 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3235 case WTAP_ERR_SHORT_WRITE:
3236 cmdarg_err("Not all the packets could be written to the %s.",
3242 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3243 wtap_strerror(err));
3245 cmdarg_err("An error occurred while writing to the %s: %s.",
3246 save_file_string, wtap_strerror(err));
3250 g_free(save_file_string);
3254 show_print_file_io_error(int err)
3259 cmdarg_err("Not all the packets could be printed because there is "
3260 "no space left on the file system.");
3265 cmdarg_err("Not all the packets could be printed because you are "
3266 "too close to, or over your disk quota.");
3271 cmdarg_err("An error occurred while printing packets: %s.",
3278 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3282 static char errmsg_errno[1024+1];
3285 /* Wiretap error. */
3288 case WTAP_ERR_NOT_REGULAR_FILE:
3289 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3292 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3293 /* Seen only when opening a capture file for reading. */
3294 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3297 case WTAP_ERR_UNSUPPORTED:
3298 /* Seen only when opening a capture file for reading. */
3299 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3300 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3303 errmsg = errmsg_errno;
3306 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3307 /* Seen only when opening a capture file for writing. */
3308 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3309 "The file \"%%s\" is a pipe, and %s capture files can't be "
3310 "written to a pipe.", wtap_file_type_string(file_type));
3311 errmsg = errmsg_errno;
3314 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3315 /* Seen only when opening a capture file for writing. */
3316 errmsg = "TShark doesn't support writing capture files in that format.";
3319 case WTAP_ERR_UNSUPPORTED_ENCAP:
3321 errmsg = "TShark can't save this capture in that format.";
3323 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3324 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3327 errmsg = errmsg_errno;
3331 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3333 errmsg = "TShark can't save this capture in that format.";
3335 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3338 case WTAP_ERR_BAD_RECORD:
3339 /* Seen only when opening a capture file for reading. */
3340 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3341 "The file \"%%s\" appears to be damaged or corrupt.\n"
3344 errmsg = errmsg_errno;
3347 case WTAP_ERR_CANT_OPEN:
3349 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3351 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3354 case WTAP_ERR_SHORT_READ:
3355 errmsg = "The file \"%s\" appears to have been cut short"
3356 " in the middle of a packet or other data.";
3359 case WTAP_ERR_SHORT_WRITE:
3360 errmsg = "A full header couldn't be written to the file \"%s\".";
3364 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3365 "The file \"%%s\" could not be %s: %s.",
3366 for_writing ? "created" : "opened",
3367 wtap_strerror(err));
3368 errmsg = errmsg_errno;
3372 errmsg = file_open_error_message(err, for_writing);
3377 * Open/create errors are reported with an console message in TShark.
3380 open_failure_message(const char *filename, int err, gboolean for_writing)
3382 fprintf(stderr, "tshark: ");
3383 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3384 fprintf(stderr, "\n");
3389 * General errors are reported with an console message in TShark.
3392 failure_message(const char *msg_format, va_list ap)
3394 fprintf(stderr, "tshark: ");
3395 vfprintf(stderr, msg_format, ap);
3396 fprintf(stderr, "\n");
3400 * Read errors are reported with an console message in TShark.
3403 read_failure_message(const char *filename, int err)
3405 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3406 filename, strerror(err));
3410 * Write errors are reported with an console message in TShark.
3413 write_failure_message(const char *filename, int err)
3415 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3416 filename, strerror(err));
3420 * Print to the standard error. This is a command-line tool, so there's
3421 * no need to pop up a console.
3424 vfprintf_stderr(const char *fmt, va_list ap)
3426 vfprintf(stderr, fmt, ap);
3430 fprintf_stderr(const char *fmt, ...)
3435 vfprintf_stderr(fmt, ap);
3440 * Report an error in command-line arguments.
3443 cmdarg_err(const char *fmt, ...)
3448 failure_message(fmt, ap);
3453 * Report additional information for an error in command-line arguments.
3456 cmdarg_err_cont(const char *fmt, ...)
3461 vfprintf(stderr, fmt, ap);
3462 fprintf(stderr, "\n");