3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
65 #include <epan/epan.h>
66 #include <epan/filesystem.h>
67 #include <wsutil/privileges.h>
70 #include <epan/timestamp.h>
71 #include <epan/packet.h>
73 #include "disabled_protos.h"
74 #include <epan/prefs.h>
75 #include <epan/column.h>
77 #include <epan/addr_resolv.h>
79 #include "clopts_common.h"
80 #include "cmdarg_err.h"
81 #include "version_info.h"
82 #include <epan/plugins.h>
84 #include <epan/epan_dissect.h>
86 #include <epan/stat_cmd_args.h>
87 #include <epan/timestamp.h>
88 #include <epan/ex-opt.h>
91 #include "capture_ui_utils.h"
92 #include "capture-pcap-util.h"
94 #include "capture-wpcap.h"
95 #include "capture_errs.h"
97 #include "capture_sync.h"
98 #endif /* HAVE_LIBPCAP */
100 #include <epan/funnel.h>
104 * This is the template for the decode as option; it is shared between the
105 * various functions that output the usage for this parameter.
107 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
109 static guint32 cum_bytes;
110 static nstime_t first_ts;
111 static nstime_t prev_dis_ts;
112 static nstime_t prev_cap_ts;
114 static gboolean print_packet_info; /* TRUE if we're to print packet information */
116 static gboolean perform_two_pass_analysis;
119 * The way the packet decode is to be written.
122 WRITE_TEXT, /* summary or detail text */
123 WRITE_XML, /* PDML or PSML */
124 WRITE_FIELDS /* User defined list of fields */
125 /* Add CSV and the like here */
128 static output_action_e output_action;
129 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
130 static gboolean verbose;
131 static gboolean print_hex;
132 static gboolean line_buffered;
134 static print_format_e print_format = PR_FMT_TEXT;
135 static print_stream_t *print_stream;
137 static output_fields_t* output_fields = NULL;
140 * Standard secondary message for unexpected errors.
142 static const char please_report[] =
143 "Please report this to the Wireshark developers";
147 * TRUE if we're to print packet counts to keep track of captured packets.
149 static gboolean print_packet_counts;
152 static capture_options global_capture_opts;
155 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
156 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
159 static int capture(void);
160 static void report_counts(void);
162 static BOOL WINAPI capture_cleanup(DWORD);
164 static void capture_cleanup(int);
166 static void report_counts_siginfo(int);
169 #endif /* HAVE_LIBPCAP */
171 static int load_cap_file(capture_file *, char *, int, int, gint64);
172 static gboolean process_packet(capture_file *cf, gint64 offset,
173 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
174 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
175 static void show_capture_file_io_error(const char *, int, gboolean);
176 static void show_print_file_io_error(int err);
177 static gboolean write_preamble(capture_file *cf);
178 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
179 static gboolean write_finale(void);
180 static const char *cf_open_error_message(int err, gchar *err_info,
181 gboolean for_writing, int file_type);
183 static void open_failure_message(const char *filename, int err,
184 gboolean for_writing);
185 static void failure_message(const char *msg_format, va_list ap);
186 static void read_failure_message(const char *filename, int err);
187 static void write_failure_message(const char *filename, int err);
192 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
194 g_assert_not_reached();
197 static void list_capture_types(void) {
200 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
201 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
202 if (wtap_dump_can_open(i))
203 fprintf(stderr, " %s - %s\n",
204 wtap_file_type_short_string(i), wtap_file_type_string(i));
209 print_usage(gboolean print_ver)
216 "TShark " VERSION "%s\n"
217 "Dump and analyze network traffic.\n"
218 "See http://www.wireshark.org for more information.\n"
221 wireshark_svnversion, get_copyright_info());
225 fprintf(output, "\n");
226 fprintf(output, "Usage: tshark [options] ...\n");
227 fprintf(output, "\n");
230 fprintf(output, "Capture interface:\n");
231 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
232 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
233 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
234 fprintf(output, " -p don't capture in promiscuous mode\n");
236 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
238 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
239 fprintf(output, " -D print list of interfaces and exit\n");
240 fprintf(output, " -L print list of link-layer types of iface and exit\n");
241 fprintf(output, "\n");
242 fprintf(output, "Capture stop conditions:\n");
243 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
244 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
245 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
246 fprintf(output, " files:NUM - stop after NUM files\n");
247 /*fprintf(output, "\n");*/
248 fprintf(output, "Capture output:\n");
249 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
250 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
251 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
252 #endif /* HAVE_LIBPCAP */
254 /*fprintf(output, "\n");*/
255 fprintf(output, "Input file:\n");
256 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
258 fprintf(output, "\n");
259 fprintf(output, "Processing:\n");
260 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
261 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
262 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
263 fprintf(output, " -d %s ...\n", decode_as_arg_template);
264 fprintf(output, " \"Decode As\", see the man page for details\n");
265 fprintf(output, " Example: tcp.port==8888,http\n");
267 /*fprintf(output, "\n");*/
268 fprintf(output, "Output:\n");
269 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
270 fprintf(output, " (or to the standard output for \"-\")\n");
271 fprintf(output, " -C <config profile> start with specified configuration profile\n");
272 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
273 fprintf(output, " an empty \"-F\" option will list the file types\n");
274 fprintf(output, " -V add output of packet tree (Packet Details)\n");
275 fprintf(output, " -S display packets even when writing to a file\n");
276 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
277 fprintf(output, " -T pdml|ps|psml|text|fields\n");
278 fprintf(output, " format of text output (def: text)\n");
279 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
280 fprintf(output, " this option can be repeated to print multiple fields\n");
281 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
282 fprintf(output, " header=y|n switch headers on and off\n");
283 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
284 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
285 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
286 fprintf(output, " -l flush standard output after each packet\n");
287 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
288 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
289 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
291 fprintf(output, "\n");
292 fprintf(output, "Miscellaneous:\n");
293 fprintf(output, " -h display this help and exit\n");
294 fprintf(output, " -v display version info and exit\n");
295 fprintf(output, " -o <name>:<value> ... override preference setting\n");
296 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
300 * For a dissector table, print on the stream described by output,
301 * its short name (which is what's used in the "-d" option) and its
305 display_dissector_table_names(const char *table_name, const char *ui_name,
308 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
312 * For a dissector handle, print on the stream described by output,
313 * the filter name (which is what's used in the "-d" option) and the full
314 * name for the protocol that corresponds to this handle.
317 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
320 const gchar* proto_filter_name;
321 const gchar* proto_ui_name;
323 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
325 if (proto_id != -1) {
326 proto_filter_name = proto_get_protocol_filter_name(proto_id);
327 proto_ui_name = proto_get_protocol_name(proto_id);
328 g_assert(proto_filter_name != NULL);
329 g_assert(proto_ui_name != NULL);
331 fprintf((FILE *)output, "\t%s (%s)\n",
338 * The protocol_name_search structure is used by find_protocol_name_func()
339 * to pass parameters and store results
341 struct protocol_name_search{
342 gchar *searched_name; /* Protocol filter name we are looking for */
343 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
344 guint nb_match; /* How many dissectors matched searched_name */
346 typedef struct protocol_name_search *protocol_name_search_t;
349 * This function parses all dissectors associated with a table to find the
350 * one whose protocol has the specified filter name. It is called
351 * as a reference function in a call to dissector_table_foreach_handle.
352 * The name we are looking for, as well as the results, are stored in the
353 * protocol_name_search struct pointed to by user_data.
354 * If called using dissector_table_foreach_handle, we actually parse the
355 * whole list of dissectors.
358 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
362 const gchar *protocol_filter_name;
363 protocol_name_search_t search_info;
367 search_info = (protocol_name_search_t)user_data;
369 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
370 if (proto_id != -1) {
371 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
372 g_assert(protocol_filter_name != NULL);
373 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
375 if (search_info->nb_match == 0) {
376 /* Record this handle only if this is the first match */
377 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
379 search_info->nb_match++;
385 * Print all layer type names supported.
386 * We send the output to the stream described by the handle output.
390 fprint_all_layer_types(FILE *output)
393 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
397 * Print all protocol names supported for a specific layer type.
398 * table_name contains the layer type name in which the search is performed.
399 * We send the output to the stream described by the handle output.
403 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
406 dissector_table_foreach_handle(table_name,
407 display_dissector_names,
412 * The function below parses the command-line parameters for the decode as
413 * feature (a string pointer by cl_param).
414 * It checks the format of the command-line, searches for a matching table
415 * and dissector. If a table/dissector match is not found, we display a
416 * summary of the available tables/dissectors (on stderr) and return FALSE.
417 * If everything is fine, we get the "Decode as" preference activated,
418 * then we return TRUE.
421 add_decode_as(const gchar *cl_param)
425 gchar *decoded_param;
426 gchar *remaining_param;
428 gchar *dissector_str;
429 dissector_handle_t dissector_matching;
430 dissector_table_t table_matching;
431 ftenum_t dissector_table_selector_type;
432 struct protocol_name_search user_protocol_name;
434 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
437 decoded_param = g_strdup(cl_param);
438 g_assert(decoded_param);
441 /* The lines below will parse this string (modifying it) to extract all
442 necessary information. Note that decoded_param is still needed since
443 strings are not copied - we just save pointers. */
445 /* This section extracts a layer type (table_name) from decoded_param */
446 table_name = decoded_param; /* Layer type string starts from beginning */
448 remaining_param = strchr(table_name, '=');
449 if (remaining_param == NULL) {
450 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
451 /* If the argument does not follow the template, carry on anyway to check
452 if the table name is at least correct. If remaining_param is NULL,
453 we'll exit anyway further down */
456 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
459 /* Remove leading and trailing spaces from the table name */
460 while ( table_name[0] == ' ' )
462 while ( table_name[strlen(table_name) - 1] == ' ' )
463 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
465 /* The following part searches a table matching with the layer type specified */
466 table_matching = NULL;
468 /* Look for the requested table */
469 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
470 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
473 table_matching = find_dissector_table(table_name);
474 if (!table_matching) {
475 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
479 if (!table_matching) {
480 /* Display a list of supported layer types to help the user, if the
481 specified layer type was not found */
482 cmdarg_err("Valid layer types are:");
483 fprint_all_layer_types(stderr);
485 if (remaining_param == NULL || !table_matching) {
486 /* Exit if the layer type was not found, or if no '=' separator was found
488 g_free(decoded_param);
492 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
493 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
496 remaining_param++; /* Move to the second '=' */
497 *remaining_param = '\0'; /* Remove the second '=' */
499 remaining_param++; /* Position after the layer type string */
501 /* This section extracts a selector value (selector_str) from decoded_param */
503 selector_str = remaining_param; /* Next part starts with the selector number */
505 remaining_param = strchr(selector_str, ',');
506 if (remaining_param == NULL) {
507 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
508 /* If the argument does not follow the template, carry on anyway to check
509 if the selector value is at least correct. If remaining_param is NULL,
510 we'll exit anyway further down */
513 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
516 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
518 switch (dissector_table_selector_type) {
524 /* The selector for this table is an unsigned number. Parse it as such.
525 There's no need to remove leading and trailing spaces from the
526 selector number string, because sscanf will do that for us. */
527 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
528 cmdarg_err("Invalid selector number \"%s\"", selector_str);
529 g_free(decoded_param);
537 /* The selector for this table is a string. */
541 /* There are currently no dissector tables with any types other
542 than the ones listed above. */
543 g_assert_not_reached();
546 if (remaining_param == NULL) {
547 /* Exit if no ',' separator was found (see above) */
548 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
549 fprint_all_protocols_for_layer_types(stderr, table_name);
550 g_free(decoded_param);
554 remaining_param++; /* Position after the selector number string */
556 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
558 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
560 /* Remove leading and trailing spaces from the dissector name */
561 while ( dissector_str[0] == ' ' )
563 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
564 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
566 dissector_matching = NULL;
568 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
569 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 */
570 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
573 user_protocol_name.nb_match = 0;
574 user_protocol_name.searched_name = dissector_str;
575 user_protocol_name.matched_handle = NULL;
577 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 */
579 if (user_protocol_name.nb_match != 0) {
580 dissector_matching = user_protocol_name.matched_handle;
581 if (user_protocol_name.nb_match > 1) {
582 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
586 /* OK, check whether the problem is that there isn't any such
587 protocol, or that there is but it's not specified as a protocol
588 that's valid for that dissector table.
589 Note, we don't exit here, but dissector_matching will remain NULL,
591 if (proto_get_id_by_filter_name(dissector_str) == -1) {
592 /* No such protocol */
593 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
595 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
596 dissector_str, table_name);
601 if (!dissector_matching) {
602 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
603 fprint_all_protocols_for_layer_types(stderr, table_name);
604 g_free(decoded_param);
608 /* This is the end of the code that parses the command-line options.
609 All information is now stored in the variables:
613 The above variables that are strings are still pointing to areas within
614 decoded_parm. decoded_parm thus still needs to be kept allocated in
615 until we stop needing these variables
616 decoded_param will be deallocated at each exit point of this function */
619 /* We now have a pointer to the handle for the requested dissector
620 (requested protocol) inside the variable dissector_matching */
621 switch (dissector_table_selector_type) {
627 /* The selector for this table is an unsigned number. */
628 dissector_change(table_name, selector, dissector_matching);
634 /* The selector for this table is a string. */
635 dissector_change_string(table_name, selector_str, dissector_matching);
639 /* There are currently no dissector tables with any types other
640 than the ones listed above. */
641 g_assert_not_reached();
643 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
648 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
649 const gchar *message, gpointer user_data)
651 /* ignore log message, if log_level isn't interesting based
652 upon the console log preferences.
653 If the preferences haven't been loaded loaded yet, display the
656 The default console_log_level preference value is such that only
657 ERROR, CRITICAL and WARNING level messages are processed;
658 MESSAGE, INFO and DEBUG level messages are ignored.
660 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
661 ERROR and CRITICAL level messages so the current code is a behavioral
662 change. The current behavior is the same as in Wireshark.
664 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
665 prefs.console_log_level != 0) {
669 g_log_default_handler(log_domain, log_level, message, user_data);
674 output_file_description(const char *fname)
676 char *save_file_string;
678 /* Get a string that describes what we're writing to */
679 if (strcmp(fname, "-") == 0) {
680 /* We're writing to the standard output */
681 save_file_string = g_strdup("standard output");
683 /* We're writing to a file with the name in save_file */
684 save_file_string = g_strdup_printf("file \"%s\"", fname);
686 return save_file_string;
690 print_current_user(void) {
691 gchar *cur_user, *cur_group;
692 if (started_with_special_privs()) {
693 cur_user = get_cur_username();
694 cur_group = get_cur_groupname();
695 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
696 cur_user, cur_group);
699 if (running_with_special_privs()) {
700 fprintf(stderr, " This could be dangerous.");
702 fprintf(stderr, "\n");
707 check_capture_privs(void) {
710 /* Warn the user if npf.sys isn't loaded. */
711 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
712 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
713 "capturing or\nlisting interfaces.\n");
719 show_version(GString *comp_info_str, GString *runtime_info_str)
721 printf("TShark " VERSION "%s\n"
728 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
729 runtime_info_str->str);
733 main(int argc, char *argv[])
735 char *init_progfile_dir_error;
737 gboolean arg_error = FALSE;
743 char *gpf_path, *pf_path;
744 char *gdp_path, *dp_path;
745 int gpf_open_errno, gpf_read_errno;
746 int pf_open_errno, pf_read_errno;
747 int gdp_open_errno, gdp_read_errno;
748 int dp_open_errno, dp_read_errno;
751 gboolean list_link_layer_types = FALSE;
752 gboolean start_capture = FALSE;
755 gboolean capture_option_specified = FALSE;
757 gboolean quiet = FALSE;
758 int out_file_type = WTAP_FILE_PCAP;
759 gchar *cf_name = NULL, *rfilter = NULL;
760 #ifdef HAVE_PCAP_OPEN_DEAD
761 struct bpf_program fcode;
763 dfilter_t *rfcode = NULL;
766 GLogLevelFlags log_flags;
769 #define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:K:lLnN:o:pPqr:R:s:St:T:vVw:xX:y:z:"
772 #define OPTSTRING_WIN32 "B:"
774 #define OPTSTRING_WIN32 ""
777 #define OPTSTRING_WIN32 ""
778 #endif /* HAVE_LIBPCAP */
780 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
783 * Get credential information for later use.
785 get_credential_info();
788 * Attempt to get the pathname of the executable file.
790 init_progfile_dir_error = init_progfile_dir(argv[0], main);
791 if (init_progfile_dir_error != NULL) {
792 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
793 init_progfile_dir_error);
797 * In order to have the -X opts assigned before the wslua machine starts
798 * we need to call getopts before epan_init() gets called.
801 optind_initial = optind;
803 while ((opt = getopt(argc, argv, optstring)) != -1) {
805 case 'C': /* Configuration Profile */
806 if (profile_exists (optarg)) {
807 set_profile_name (optarg);
809 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
821 optind = optind_initial;
826 /** Send All g_log messages to our own handler **/
830 G_LOG_LEVEL_CRITICAL|
835 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
837 g_log_set_handler(NULL,
839 tshark_log_handler, NULL /* user_data */);
840 g_log_set_handler(LOG_DOMAIN_MAIN,
842 tshark_log_handler, NULL /* user_data */);
845 g_log_set_handler(LOG_DOMAIN_CAPTURE,
847 tshark_log_handler, NULL /* user_data */);
848 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
850 tshark_log_handler, NULL /* user_data */);
853 initialize_funnel_ops();
856 capture_opts_init(&global_capture_opts, &cfile);
859 timestamp_set_type(TS_RELATIVE);
860 timestamp_set_precision(TS_PREC_AUTO);
862 /* Register all dissectors; we must do this before checking for the
863 "-G" flag, as the "-G" flag dumps information registered by the
864 dissectors, and we must do it before we read the preferences, in
865 case any dissectors register preferences. */
866 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
867 failure_message, open_failure_message, read_failure_message,
868 write_failure_message);
870 /* Register all tap listeners; we do this before we parse the arguments,
871 as the "-z" argument can specify a registered tap. */
873 /* we register the plugin taps before the other taps because
874 stats_tree taps plugins will be registered as tap listeners
875 by stats_tree_stat.c and need to registered before that */
877 register_all_plugin_tap_listeners();
879 register_all_tap_listeners();
881 /* Now register the preferences for any non-dissector modules.
882 We must do that before we read the preferences as well. */
883 prefs_register_modules();
885 /* If invoked with the "-G" flag, we dump out information based on
886 the argument to the "-G" flag; if no argument is specified,
887 for backwards compatibility we dump out a glossary of display
890 XXX - we do this here, for now, to support "-G" with no arguments.
891 If none of our build or other processes uses "-G" with no arguments,
892 we can just process it with the other arguments. */
893 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
894 proto_initialize_all_prefixes();
897 proto_registrar_dump_fields(1);
899 if (strcmp(argv[2], "fields") == 0)
900 proto_registrar_dump_fields(1);
901 else if (strcmp(argv[2], "fields2") == 0)
902 proto_registrar_dump_fields(2);
903 else if (strcmp(argv[2], "fields3") == 0)
904 proto_registrar_dump_fields(3);
905 else if (strcmp(argv[2], "protocols") == 0)
906 proto_registrar_dump_protocols();
907 else if (strcmp(argv[2], "values") == 0)
908 proto_registrar_dump_values();
909 else if (strcmp(argv[2], "decodes") == 0)
910 dissector_dump_decodes();
911 else if (strcmp(argv[2], "defaultprefs") == 0)
913 else if (strcmp(argv[2], "currentprefs") == 0) {
914 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
915 &pf_open_errno, &pf_read_errno, &pf_path);
918 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
925 /* Set the C-language locale to the native environment. */
926 setlocale(LC_ALL, "");
928 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
929 &pf_open_errno, &pf_read_errno, &pf_path);
930 if (gpf_path != NULL) {
931 if (gpf_open_errno != 0) {
932 cmdarg_err("Can't open global preferences file \"%s\": %s.",
933 pf_path, strerror(gpf_open_errno));
935 if (gpf_read_errno != 0) {
936 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
937 pf_path, strerror(gpf_read_errno));
940 if (pf_path != NULL) {
941 if (pf_open_errno != 0) {
942 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
943 strerror(pf_open_errno));
945 if (pf_read_errno != 0) {
946 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
947 pf_path, strerror(pf_read_errno));
953 /* Set the name resolution code's flags from the preferences. */
954 g_resolv_flags = prefs_p->name_resolve;
956 /* Read the disabled protocols file. */
957 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
958 &dp_path, &dp_open_errno, &dp_read_errno);
959 if (gdp_path != NULL) {
960 if (gdp_open_errno != 0) {
961 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
962 gdp_path, strerror(gdp_open_errno));
964 if (gdp_read_errno != 0) {
965 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
966 gdp_path, strerror(gdp_read_errno));
970 if (dp_path != NULL) {
971 if (dp_open_errno != 0) {
973 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
974 strerror(dp_open_errno));
976 if (dp_read_errno != 0) {
978 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
979 strerror(dp_read_errno));
984 check_capture_privs();
986 cap_file_init(&cfile);
988 /* Print format defaults to this. */
989 print_format = PR_FMT_TEXT;
991 output_fields = output_fields_new();
993 /* Now get our args */
994 while ((opt = getopt(argc, argv, optstring)) != -1) {
996 case 'a': /* autostop criteria */
997 case 'b': /* Ringbuffer option */
998 case 'c': /* Capture x packets */
999 case 'f': /* capture filter */
1000 case 'i': /* Use interface x */
1001 case 'p': /* Don't capture in promiscuous mode */
1002 case 's': /* Set the snapshot (capture) length */
1003 case 'w': /* Write to capture file x */
1004 case 'y': /* Set the pcap data link type */
1006 case 'B': /* Buffer size */
1009 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1014 capture_option_specified = TRUE;
1019 /* Configuration profile settings were already processed just ignore them this time*/
1021 case 'd': /* Decode as rule */
1022 if (!add_decode_as(optarg))
1025 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1026 case 'K': /* Kerberos keytab file */
1027 read_keytab_file(optarg);
1030 case 'D': /* Print a list of capture devices and exit */
1032 status = capture_opts_list_interfaces(FALSE);
1035 capture_option_specified = TRUE;
1041 output_fields_add(output_fields, optarg);
1045 if(!output_fields_set_option(output_fields, optarg)) {
1046 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1047 output_fields_list_options(stderr);
1052 out_file_type = wtap_short_string_to_file_type(optarg);
1053 if (out_file_type < 0) {
1054 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1055 list_capture_types();
1059 case 'h': /* Print help and exit */
1063 case 'l': /* "Line-buffer" standard output */
1064 /* This isn't line-buffering, strictly speaking, it's just
1065 flushing the standard output after the information for
1066 each packet is printed; however, that should be good
1067 enough for all the purposes to which "-l" is put (and
1068 is probably actually better for "-V", as it does fewer
1071 See the comment in "process_packet()" for an explanation of
1072 why we do that, and why we don't just use "setvbuf()" to
1073 make the standard output line-buffered (short version: in
1074 Windows, "line-buffered" is the same as "fully-buffered",
1075 and the output buffer is only flushed when it fills up). */
1076 line_buffered = TRUE;
1078 case 'L': /* Print list of link-layer types and exit */
1080 list_link_layer_types = TRUE;
1082 capture_option_specified = TRUE;
1086 #if GLIB_CHECK_VERSION(2,10,0)
1087 case 'P': /* Perform two pass analysis */
1088 perform_two_pass_analysis = TRUE;
1091 case 'n': /* No name resolution */
1092 g_resolv_flags = RESOLV_NONE;
1094 case 'N': /* Select what types of addresses/port #s to resolve */
1095 if (g_resolv_flags == RESOLV_ALL)
1096 g_resolv_flags = RESOLV_NONE;
1097 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1098 if (badopt != '\0') {
1099 cmdarg_err("-N specifies unknown resolving option '%c';",
1101 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1105 case 'o': /* Override preference from command line */
1106 switch (prefs_set_pref(optarg)) {
1111 case PREFS_SET_SYNTAX_ERR:
1112 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1116 case PREFS_SET_NO_SUCH_PREF:
1117 case PREFS_SET_OBSOLETE:
1118 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1123 case 'q': /* Quiet */
1126 case 'r': /* Read capture file x */
1127 cf_name = g_strdup(optarg);
1129 case 'R': /* Read file filter */
1132 case 'S': /* show packets in real time */
1133 print_packet_info = TRUE;
1135 case 't': /* Time stamp type */
1136 if (strcmp(optarg, "r") == 0)
1137 timestamp_set_type(TS_RELATIVE);
1138 else if (strcmp(optarg, "a") == 0)
1139 timestamp_set_type(TS_ABSOLUTE);
1140 else if (strcmp(optarg, "ad") == 0)
1141 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1142 else if (strcmp(optarg, "d") == 0)
1143 timestamp_set_type(TS_DELTA);
1144 else if (strcmp(optarg, "dd") == 0)
1145 timestamp_set_type(TS_DELTA_DIS);
1146 else if (strcmp(optarg, "e") == 0)
1147 timestamp_set_type(TS_EPOCH);
1149 cmdarg_err("Invalid time stamp type \"%s\"",
1151 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1152 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1156 case 'T': /* printing Type */
1157 if (strcmp(optarg, "text") == 0) {
1158 output_action = WRITE_TEXT;
1159 print_format = PR_FMT_TEXT;
1160 } else if (strcmp(optarg, "ps") == 0) {
1161 output_action = WRITE_TEXT;
1162 print_format = PR_FMT_PS;
1163 } else if (strcmp(optarg, "pdml") == 0) {
1164 output_action = WRITE_XML;
1166 } else if (strcmp(optarg, "psml") == 0) {
1167 output_action = WRITE_XML;
1169 } else if(strcmp(optarg, "fields") == 0) {
1170 output_action = WRITE_FIELDS;
1171 verbose = TRUE; /* Need full tree info */
1173 cmdarg_err("Invalid -T parameter.");
1174 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1178 case 'v': /* Show version and exit */
1180 GString *comp_info_str;
1181 GString *runtime_info_str;
1182 /* Assemble the compile-time version information string */
1183 comp_info_str = g_string_new("Compiled ");
1184 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1186 /* Assemble the run-time version information string */
1187 runtime_info_str = g_string_new("Running ");
1188 get_runtime_version_info(runtime_info_str, NULL);
1189 show_version(comp_info_str, runtime_info_str);
1190 g_string_free(comp_info_str, TRUE);
1191 g_string_free(runtime_info_str, TRUE);
1195 case 'V': /* Verbose */
1197 /* The user asked for a verbose output, so let's ensure they get it,
1198 * even if they're writing to a file.
1200 print_packet_info = TRUE;
1202 case 'x': /* Print packet data in hex (and ASCII) */
1204 /* The user asked for hex output, so let's ensure they get it,
1205 * even if they're writing to a file.
1207 print_packet_info = TRUE;
1212 /* We won't call the init function for the stat this soon
1213 as it would disallow MATE's fields (which are registered
1214 by the preferences set callback) from being used as
1215 part of a tap filter. Instead, we just add the argument
1216 to a list of stat arguments. */
1217 if (!process_stat_cmd_arg(optarg)) {
1218 cmdarg_err("invalid -z argument.");
1219 cmdarg_err_cont(" -z argument must be one of :");
1220 list_stat_cmd_args();
1225 case '?': /* Bad flag - print usage message */
1228 list_capture_types();
1238 /* If we specified output fields, but not the output field type... */
1239 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1240 cmdarg_err("Output fields were specified with \"-e\", "
1241 "but \"-Tfields\" was not specified.");
1243 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1244 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1245 "specified with \"-e\".");
1250 /* If no capture filter or read filter has been specified, and there are
1251 still command-line arguments, treat them as the tokens of a capture
1252 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1253 flag was specified. */
1254 if (optind < argc) {
1255 if (cf_name != NULL) {
1256 if (rfilter != NULL) {
1257 cmdarg_err("Read filters were specified both with \"-R\" "
1258 "and with additional command-line arguments");
1261 rfilter = get_args_as_string(argc, argv, optind);
1264 if (global_capture_opts.has_cfilter) {
1265 cmdarg_err("Capture filters were specified both with \"-f\""
1266 " and with additional command-line arguments");
1269 global_capture_opts.has_cfilter = TRUE;
1270 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1272 capture_option_specified = TRUE;
1278 if (!global_capture_opts.saving_to_file) {
1279 /* We're not saving the capture to a file; if "-q" wasn't specified,
1280 we should print packet information */
1282 print_packet_info = TRUE;
1284 /* We're saving to a file; if we're writing to the standard output.
1285 and we'll also be writing dissected packets to the standard
1286 output, reject the request. At best, we could redirect that
1287 to the standard error; we *can't* write both to the standard
1288 output and have either of them be useful. */
1289 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1290 cmdarg_err("You can't write both raw packet data and dissected packets"
1291 " to the standard output.");
1296 /* We're not saving the capture to a file; if "-q" wasn't specified,
1297 we should print packet information */
1299 print_packet_info = TRUE;
1302 #ifndef HAVE_LIBPCAP
1303 if (capture_option_specified)
1304 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1311 /* We don't support capture filters when reading from a capture file
1312 (the BPF compiler doesn't support all link-layer types that we
1313 support in capture files we read). */
1315 if (cf_name != NULL) {
1316 if (global_capture_opts.has_cfilter) {
1317 cmdarg_err("Only read filters, not capture filters, "
1318 "can be specified when reading a capture file.");
1325 if (output_action != WRITE_TEXT) {
1326 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1332 if (list_link_layer_types) {
1333 /* We're supposed to list the link-layer types for an interface;
1334 did the user also specify a capture file to be read? */
1336 /* Yes - that's bogus. */
1337 cmdarg_err("You can't specify -L and a capture file to be read.");
1340 /* No - did they specify a ring buffer option? */
1341 if (global_capture_opts.multi_files_on) {
1342 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1348 * "-r" was specified, so we're reading a capture file.
1349 * Capture options don't apply here.
1351 if (global_capture_opts.multi_files_on) {
1352 cmdarg_err("Multiple capture files requested, but "
1353 "a capture isn't being done.");
1356 if (global_capture_opts.has_file_duration) {
1357 cmdarg_err("Switching capture files after a time interval was specified, but "
1358 "a capture isn't being done.");
1361 if (global_capture_opts.has_ring_num_files) {
1362 cmdarg_err("A ring buffer of capture files was specified, but "
1363 "a capture isn't being done.");
1366 if (global_capture_opts.has_autostop_files) {
1367 cmdarg_err("A maximum number of capture files was specified, but "
1368 "a capture isn't being done.");
1372 /* Note: TShark now allows the restriction of a _read_ file by packet count
1373 * and byte count as well as a write file. Other autostop options remain valid
1374 * only for a write file.
1376 if (global_capture_opts.has_autostop_duration) {
1377 cmdarg_err("A maximum capture time was specified, but "
1378 "a capture isn't being done.");
1383 * "-r" wasn't specified, so we're doing a live capture.
1385 if (global_capture_opts.saving_to_file) {
1386 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1388 /* When capturing, we only support writing libpcap format. */
1389 if (out_file_type != WTAP_FILE_PCAP) {
1390 cmdarg_err("Live captures can only be saved in libpcap format.");
1393 if (global_capture_opts.multi_files_on) {
1394 /* Multiple-file mode doesn't work under certain conditions:
1395 a) it doesn't work if you're writing to the standard output;
1396 b) it doesn't work if you're writing to a pipe;
1398 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1399 cmdarg_err("Multiple capture files requested, but "
1400 "the capture is being written to the standard output.");
1403 if (global_capture_opts.output_to_pipe) {
1404 cmdarg_err("Multiple capture files requested, but "
1405 "the capture file is a pipe.");
1408 if (!global_capture_opts.has_autostop_filesize &&
1409 !global_capture_opts.has_file_duration) {
1410 cmdarg_err("Multiple capture files requested, but "
1411 "no maximum capture file size or duration was specified.");
1416 /* They didn't specify a "-w" flag, so we won't be saving to a
1417 capture file. Check for options that only make sense if
1418 we're saving to a file. */
1419 if (global_capture_opts.has_autostop_filesize) {
1420 cmdarg_err("Maximum capture file size specified, but "
1421 "capture isn't being saved to a file.");
1424 if (global_capture_opts.multi_files_on) {
1425 cmdarg_err("Multiple capture files requested, but "
1426 "the capture isn't being saved to a file.");
1435 /* Start windows sockets */
1436 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1439 /* Notify all registered modules that have had any of their preferences
1440 changed either from one of the preferences file or from the command
1441 line that their preferences have changed. */
1444 /* At this point MATE will have registered its field array so we can
1445 have a tap filter with one of MATE's late-registered fields as part
1446 of the filter. We can now process all the "-z" arguments. */
1447 start_requested_stats();
1449 /* disabled protocols as per configuration file */
1450 if (gdp_path == NULL && dp_path == NULL) {
1451 set_disabled_protos_list();
1454 /* Build the column format array */
1455 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1458 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1459 capture_opts_trim_ring_num_files(&global_capture_opts);
1462 if (rfilter != NULL) {
1463 if (!dfilter_compile(rfilter, &rfcode)) {
1464 cmdarg_err("%s", dfilter_error_msg);
1466 #ifdef HAVE_PCAP_OPEN_DEAD
1470 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1472 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1474 " Note: That display filter code looks like a valid capture filter;");
1476 " maybe you mixed them up?");
1485 cfile.rfcode = rfcode;
1487 if (print_packet_info) {
1488 /* If we're printing as text or PostScript, we have
1489 to create a print stream. */
1490 if (output_action == WRITE_TEXT) {
1491 switch (print_format) {
1494 print_stream = print_stream_text_stdio_new(stdout);
1498 print_stream = print_stream_ps_stdio_new(stdout);
1502 g_assert_not_reached();
1507 /* We have to dissect each packet if:
1509 we're printing information about each packet;
1511 we're using a read filter on the packets;
1513 we're using any taps. */
1514 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1518 * We're reading a capture file.
1522 * Immediately relinquish any special privileges we have; we must not
1523 * be allowed to read any capture files the user running TShark
1526 relinquish_special_privs_perm();
1527 print_current_user();
1529 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1534 /* Set timestamp precision; there should arguably be a command-line
1535 option to let the user set this. */
1536 switch(wtap_file_tsprecision(cfile.wth)) {
1537 case(WTAP_FILE_TSPREC_SEC):
1538 timestamp_set_precision(TS_PREC_AUTO_SEC);
1540 case(WTAP_FILE_TSPREC_DSEC):
1541 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1543 case(WTAP_FILE_TSPREC_CSEC):
1544 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1546 case(WTAP_FILE_TSPREC_MSEC):
1547 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1549 case(WTAP_FILE_TSPREC_USEC):
1550 timestamp_set_precision(TS_PREC_AUTO_USEC);
1552 case(WTAP_FILE_TSPREC_NSEC):
1553 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1556 g_assert_not_reached();
1559 /* Process the packets in the file */
1561 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1562 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1563 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1565 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1572 /* No capture file specified, so we're supposed to do a live capture
1573 (or get a list of link-layer types for a live capture device);
1574 do we have support for live captures? */
1581 cmdarg_err("WinPcap couldn't be found.");
1582 detailed_err = cant_load_winpcap_err("TShark");
1583 cmdarg_err_cont("%s", detailed_err);
1584 g_free(detailed_err);
1589 /* trim the interface name and exit if that failed */
1590 if (!capture_opts_trim_iface(&global_capture_opts,
1591 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1595 /* if requested, list the link layer types and exit */
1596 if (list_link_layer_types) {
1597 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1601 if (print_packet_info) {
1602 if (!write_preamble(NULL)) {
1604 show_print_file_io_error(err);
1607 } else if (!quiet) {
1609 * We're not printing information for each packet, and the user
1610 * didn't ask us not to print a count of packets as they arrive,
1611 * so print that count so the user knows that packets are arriving.
1613 * XXX - what if the user wants to do a live capture, doesn't want
1614 * to save it to a file, doesn't want information printed for each
1615 * packet, does want some "-z" statistic, and wants packet counts
1616 * so they know whether they're seeing any packets?
1618 print_packet_counts = TRUE;
1621 /* For now, assume libpcap gives microsecond precision. */
1622 timestamp_set_precision(TS_PREC_AUTO_USEC);
1626 if (print_packet_info) {
1627 if (!write_finale()) {
1629 show_print_file_io_error(err);
1633 /* No - complain. */
1634 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1641 #if GLIB_CHECK_VERSION(2,10,0)
1642 if (cfile.plist_start != NULL)
1643 g_slice_free_chain(frame_data, cfile.plist_start, next);
1646 draw_tap_listeners(TRUE);
1647 funnel_dump_all_text_windows();
1650 output_fields_free(output_fields);
1651 output_fields = NULL;
1656 /*#define USE_BROKEN_G_MAIN_LOOP*/
1658 #ifdef USE_BROKEN_G_MAIN_LOOP
1661 gboolean loop_running = FALSE;
1663 guint32 packet_count = 0;
1666 /* XXX - move to the right position / file */
1667 /* read from a pipe (callback) */
1668 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1670 typedef struct pipe_input_tag {
1674 pipe_input_cb_t input_cb;
1675 guint pipe_input_id;
1677 GStaticMutex callback_running;
1681 static pipe_input_t pipe_input;
1684 /* The timer has expired, see if there's stuff to read from the pipe,
1685 if so, do the callback */
1687 pipe_timer_cb(gpointer data)
1691 gboolean result, result1;
1693 pipe_input_t *pipe_input = data;
1694 gint iterations = 0;
1697 g_static_mutex_lock (&pipe_input->callback_running);
1699 /* try to read data from the pipe only 5 times, to avoid blocking */
1700 while(iterations < 5) {
1701 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1703 /* Oddly enough although Named pipes don't work on win9x,
1704 PeekNamedPipe does !!! */
1705 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1706 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1708 /* Get the child process exit status */
1709 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1712 /* If the Peek returned an error, or there are bytes to be read
1713 or the childwatcher thread has terminated then call the normal
1715 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1717 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1719 /* And call the real handler */
1720 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1721 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1722 /* pipe closed, return false so that the timer is stopped */
1723 g_static_mutex_unlock (&pipe_input->callback_running);
1728 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1729 /* No data, stop now */
1736 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1738 g_static_mutex_unlock (&pipe_input->callback_running);
1740 /* we didn't stopped the timer, so let it run */
1747 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1750 pipe_input.source = source;
1751 pipe_input.child_process = child_process;
1752 pipe_input.user_data = user_data;
1753 pipe_input.input_cb = input_cb;
1756 g_static_mutex_init(&pipe_input.callback_running);
1757 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1758 do this but that doesn't cover all win32 platforms. GTK can do
1759 this but doesn't seem to work over processes. Attempt to do
1760 something similar here, start a timer and check for data on every
1762 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1763 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1773 #ifdef USE_TSHARK_SELECT
1777 struct sigaction action, oldaction;
1781 * XXX - dropping privileges is still required, until code cleanup is done
1783 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1784 * when it's done, we don't need special privileges to run tshark at all,
1785 * therefore we don't need to drop these privileges
1786 * The only thing we might want to keep is a warning if tshark is run as root,
1787 * as it's no longer necessary and potentially dangerous.
1789 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1790 * We've opened the capture device, so we shouldn't need any special
1791 * privileges any more; relinquish those privileges.
1793 * XXX - if we have saved set-user-ID support, we should give up those
1794 * privileges immediately, and then reclaim them long enough to get
1795 * a list of network interfaces and to open one, and then give them
1796 * up again, so that stuff we do while processing the argument list,
1797 * reading the user's preferences, loading and starting plugins
1798 * (especially *user* plugins), etc. is done with the user's privileges,
1799 * not special privileges.
1801 relinquish_special_privs_perm();
1802 print_current_user();
1804 /* Cleanup all data structures used for dissection. */
1805 cleanup_dissection();
1806 /* Initialize all data structures used for dissection. */
1810 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1811 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1813 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1815 action.sa_handler = capture_cleanup;
1816 action.sa_flags = 0;
1817 sigemptyset(&action.sa_mask);
1818 sigaction(SIGTERM, &action, NULL);
1819 sigaction(SIGINT, &action, NULL);
1820 sigaction(SIGHUP, NULL, &oldaction);
1821 if (oldaction.sa_handler == SIG_DFL)
1822 sigaction(SIGHUP, &action, NULL);
1825 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1826 quiet mode, report the number of packets we've captured. */
1827 action.sa_handler = report_counts_siginfo;
1828 action.sa_flags = 0;
1829 sigemptyset(&action.sa_mask);
1830 sigaction(SIGINFO, &action, NULL);
1831 #endif /* SIGINFO */
1834 global_capture_opts.state = CAPTURE_PREPARING;
1836 /* Let the user know what interface was chosen. */
1837 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1838 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1840 ret = sync_pipe_start(&global_capture_opts);
1845 /* the actual capture loop
1847 * XXX - glib doesn't seem to provide any event based loop handling.
1849 * XXX - for whatever reason,
1850 * calling g_main_loop_new() ends up in 100% cpu load.
1852 * But that doesn't matter: in UNIX we can use select() to find an input
1853 * source with something to do.
1855 * But that doesn't matter because we're in a CLI (that doesn't need to
1856 * update a GUI or something at the same time) so it's OK if we block
1857 * trying to read from the pipe.
1859 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1860 * wrong (but I leave it there in case I am...).
1863 #ifdef USE_TSHARK_SELECT
1865 FD_SET(pipe_input.source, &readfds);
1868 loop_running = TRUE;
1870 while (loop_running)
1872 #ifdef USE_TSHARK_SELECT
1873 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1879 } else if (ret == 1) {
1881 /* Call the real handler */
1882 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1883 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1886 #ifdef USE_TSHARK_SELECT
1895 /* XXX - move the call to main_window_update() out of capture_sync.c */
1896 /* dummy for capture_sync.c to make linker happy */
1897 void main_window_update(void)
1901 /* capture child detected an error */
1903 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1905 cmdarg_err("%s", error_msg);
1906 cmdarg_err_cont("%s", secondary_error_msg);
1910 /* capture child detected an capture filter related error */
1912 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1914 dfilter_t *rfcode = NULL;
1917 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1919 "Invalid capture filter: \"%s\"!\n"
1921 "That string looks like a valid display filter; however, it isn't a valid\n"
1922 "capture filter (%s).\n"
1924 "Note that display filters and capture filters don't have the same syntax,\n"
1925 "so you can't use most display filter expressions as capture filters.\n"
1927 "See the User's Guide for a description of the capture filter syntax.",
1928 capture_opts->cfilter, error_message);
1929 dfilter_free(rfcode);
1932 "Invalid capture filter: \"%s\"!\n"
1934 "That string isn't a valid capture filter (%s).\n"
1935 "See the User's Guide for a description of the capture filter syntax.",
1936 capture_opts->cfilter, error_message);
1941 /* capture child tells us we have a new (or the first) capture file */
1943 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1945 gboolean is_tempfile;
1949 if(capture_opts->state == CAPTURE_PREPARING) {
1950 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1952 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1954 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1956 /* free the old filename */
1957 if (capture_opts->save_file != NULL) {
1959 /* we start a new capture file, close the old one (if we had one before) */
1960 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1961 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1962 wtap_close(((capture_file *) capture_opts->cf)->wth);
1964 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1967 g_free(capture_opts->save_file);
1968 is_tempfile = FALSE;
1970 /* we didn't had a save_file before, must be a tempfile */
1974 /* save the new filename */
1975 capture_opts->save_file = g_strdup(new_file);
1977 /* if we are in real-time mode, open the new file now */
1979 /* Attempt to open the capture file and set up to read from it. */
1980 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1984 /* Don't unlink (delete) the save file - leave it around,
1985 for debugging purposes. */
1986 g_free(capture_opts->save_file);
1987 capture_opts->save_file = NULL;
1992 capture_opts->state = CAPTURE_RUNNING;
1998 /* capture child tells us we have new packets to read */
2000 capture_input_new_packets(capture_options *capture_opts, int to_read)
2006 capture_file *cf = capture_opts->cf;
2007 gboolean filtering_tap_listeners;
2012 * Prevent a SIGINFO handler from writing to stdout while we're
2013 * doing so; instead, have it just set a flag telling us to print
2014 * that information when we're done.
2017 #endif /* SIGINFO */
2019 /* Do we have any tap listeners with filters? */
2020 filtering_tap_listeners = have_filtering_tap_listeners();
2022 /* Get the union of the flags for all tap listeners. */
2023 tap_flags = union_of_tap_listener_flags();
2026 while (to_read-- && cf->wth) {
2027 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2029 /* read from file failed, tell the capture child to stop */
2030 sync_pipe_stop(capture_opts);
2031 wtap_close(cf->wth);
2034 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2035 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2036 filtering_tap_listeners, tap_flags);
2039 /* packet sucessfully read and gone through the "Read Filter" */
2045 * Dumpcap's doing all the work; we're not doing any dissection.
2046 * Count all the packets it wrote.
2048 packet_count += to_read;
2051 if (print_packet_counts) {
2052 /* We're printing packet counts. */
2053 if (packet_count != 0) {
2054 fprintf(stderr, "\r%u ", packet_count);
2055 /* stderr could be line buffered */
2062 * Allow SIGINFO handlers to write.
2067 * If a SIGINFO handler asked us to write out capture counts, do so.
2071 #endif /* SIGINFO */
2077 if (!print_packet_counts) {
2078 /* Report the count only if we aren't printing a packet count
2079 as packets arrive. */
2080 fprintf(stderr, "%u packet%s captured\n", packet_count,
2081 plurality(packet_count, "", "s"));
2084 infoprint = FALSE; /* we just reported it */
2085 #endif /* SIGINFO */
2090 report_counts_siginfo(int signum _U_)
2092 int sav_errno = errno;
2093 /* If we've been told to delay printing, just set a flag asking
2094 that we print counts (if we're supposed to), otherwise print
2095 the count of packets captured (if we're supposed to). */
2102 #endif /* SIGINFO */
2105 /* capture child detected any packet drops? */
2107 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2109 if (print_packet_counts) {
2110 /* We're printing packet counts to stderr.
2111 Send a newline so that we move to the line after the packet count. */
2112 fprintf(stderr, "\n");
2116 /* We're printing packet counts to stderr.
2117 Send a newline so that we move to the line after the packet count. */
2118 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2123 /* capture child closed its side of the pipe, do the required cleanup */
2125 capture_input_closed(capture_options *capture_opts)
2129 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2130 wtap_close(((capture_file *) capture_opts->cf)->wth);
2132 #ifdef USE_BROKEN_G_MAIN_LOOP
2133 /*g_main_loop_quit(loop);*/
2136 loop_running = FALSE;
2145 capture_cleanup(DWORD ctrltype _U_)
2147 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2148 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2149 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2150 like SIGTERM at least when the machine's shutting down.
2152 For now, we handle them all as indications that we should clean up
2153 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2156 However, as handlers run in a new thread, we can't just longjmp
2157 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2158 no other handler - such as one that would terminate the process -
2161 XXX - for some reason, typing ^C to TShark, if you run this in
2162 a Cygwin console window in at least some versions of Cygwin,
2163 causes TShark to terminate immediately; this routine gets
2164 called, but the main loop doesn't get a chance to run and
2165 exit cleanly, at least if this is compiled with Microsoft Visual
2166 C++ (i.e., it's a property of the Cygwin console window or Bash;
2167 it happens if TShark is not built with Cygwin - for all I know,
2168 building it with Cygwin may make the problem go away). */
2170 /* tell the capture child to stop */
2171 sync_pipe_stop(&global_capture_opts);
2173 /* don't stop our own loop already here, otherwise status messages and
2174 * cleanup wouldn't be done properly. The child will indicate the stop of
2175 * everything by calling capture_input_closed() later */
2181 capture_cleanup(int signum _U_)
2183 /* tell the capture child to stop */
2184 sync_pipe_stop(&global_capture_opts);
2187 #endif /* HAVE_LIBPCAP */
2189 #if GLIB_CHECK_VERSION(2,10,0)
2191 process_packet_first_pass(capture_file *cf,
2192 gint64 offset, const struct wtap_pkthdr *whdr,
2193 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2195 frame_data *fdata = g_slice_new(frame_data);
2199 /* Count this packet. */
2202 /* If we're not running a display filter and we're not printing any
2203 packet information, we don't need to do a dissection. This means
2204 that all packets can be marked as 'passed'. */
2207 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2209 /* If we're going to print packet information, or we're going to
2210 run a read filter, or we're going to process taps, set up to
2211 do a dissection and do so. */
2212 if (do_dissection) {
2214 /* Grab any resolved addresses */
2215 host_name_lookup_process(NULL);
2217 /* The protocol tree will be "visible", i.e., printed, only if we're
2218 printing packet details, which is true if we're printing stuff
2219 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2221 epan_dissect_init(&edt, FALSE, FALSE);
2223 /* If we're running a read filter, prime the epan_dissect_t with that
2226 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2228 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2229 &first_ts, &prev_dis_ts, &prev_cap_ts);
2231 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2233 /* Run the read filter if we have one. */
2235 passed = dfilter_apply_edt(cf->rfcode, &edt);
2239 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2240 cap_file_add_fdata(cf, fdata);
2243 g_slice_free(frame_data, fdata);
2246 epan_dissect_cleanup(&edt);
2252 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2253 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2254 gboolean filtering_tap_listeners, guint tap_flags)
2256 gboolean create_proto_tree;
2261 /* If we're not running a display filter and we're not printing any
2262 packet information, we don't need to do a dissection. This means
2263 that all packets can be marked as 'passed'. */
2266 /* If we're going to print packet information, or we're going to
2267 run a read filter, or we're going to process taps, set up to
2268 do a dissection and do so. */
2269 if (do_dissection) {
2271 /* Grab any resolved addresses */
2272 host_name_lookup_process(NULL);
2274 if (cf->rfcode || verbose || filtering_tap_listeners ||
2275 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2276 create_proto_tree = TRUE;
2278 create_proto_tree = FALSE;
2280 /* The protocol tree will be "visible", i.e., printed, only if we're
2281 printing packet details, which is true if we're printing stuff
2282 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2284 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2286 /* If we're running a read filter, prime the epan_dissect_t with that
2289 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2291 col_custom_prime_edt(&edt, &cf->cinfo);
2293 tap_queue_init(&edt);
2295 /* We only need the columns if either
2297 1) some tap needs the columns
2301 2) we're printing packet info but we're *not* verbose; in verbose
2302 mode, we print the protocol tree, not the protocol summary. */
2303 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2308 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2310 tap_push_tapped_queue(&edt);
2312 /* Run the read filter if we have one. */
2314 passed = dfilter_apply_edt(cf->rfcode, &edt);
2318 /* Process this packet. */
2319 if (print_packet_info) {
2320 /* We're printing packet information; print the information for
2323 print_packet(cf, &edt);
2325 print_packet(cf, NULL);
2327 /* The ANSI C standard does not appear to *require* that a line-buffered
2328 stream be flushed to the host environment whenever a newline is
2329 written, it just says that, on such a stream, characters "are
2330 intended to be transmitted to or from the host environment as a
2331 block when a new-line character is encountered".
2333 The Visual C++ 6.0 C implementation doesn't do what is intended;
2334 even if you set a stream to be line-buffered, it still doesn't
2335 flush the buffer at the end of every line.
2337 So, if the "-l" flag was specified, we flush the standard output
2338 at the end of a packet. This will do the right thing if we're
2339 printing packet summary lines, and, as we print the entire protocol
2340 tree for a single packet without waiting for anything to happen,
2341 it should be as good as line-buffered mode if we're printing
2342 protocol trees. (The whole reason for the "-l" flag in either
2343 tcpdump or TShark is to allow the output of a live capture to
2344 be piped to a program or script and to have that script see the
2345 information for the packet as soon as it's printed, rather than
2346 having to wait until a standard I/O buffer fills up. */
2350 if (ferror(stdout)) {
2351 show_print_file_io_error(errno);
2357 if (do_dissection) {
2358 epan_dissect_cleanup(&edt);
2365 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2366 int max_packet_count, gint64 max_byte_count)
2369 int snapshot_length;
2374 char *save_file_string = NULL;
2375 gboolean filtering_tap_listeners;
2378 linktype = wtap_file_encap(cf->wth);
2379 if (save_file != NULL) {
2380 /* Get a string that describes what we're writing to */
2381 save_file_string = output_file_description(save_file);
2383 /* Set up to write to the capture file. */
2384 snapshot_length = wtap_snapshot_length(cf->wth);
2385 if (snapshot_length == 0) {
2386 /* Snapshot length of input file not known. */
2387 snapshot_length = WTAP_MAX_PACKET_SIZE;
2389 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2390 FALSE /* compressed */, &err);
2393 /* We couldn't set up to write to the capture file. */
2396 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2397 cmdarg_err("Capture files can't be written in that format.");
2400 case WTAP_ERR_UNSUPPORTED_ENCAP:
2401 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2402 cmdarg_err("The capture file being read can't be written in "
2406 case WTAP_ERR_CANT_OPEN:
2407 cmdarg_err("The %s couldn't be created for some "
2408 "unknown reason.", save_file_string);
2411 case WTAP_ERR_SHORT_WRITE:
2412 cmdarg_err("A full header couldn't be written to the %s.",
2417 cmdarg_err("The %s could not be created: %s.", save_file_string,
2418 wtap_strerror(err));
2424 if (print_packet_info) {
2425 if (!write_preamble(cf)) {
2427 show_print_file_io_error(err);
2434 /* Do we have any tap listeners with filters? */
2435 filtering_tap_listeners = have_filtering_tap_listeners();
2437 /* Get the union of the flags for all tap listeners. */
2438 tap_flags = union_of_tap_listener_flags();
2440 if (perform_two_pass_analysis) {
2441 #if GLIB_CHECK_VERSION(2,10,0)
2443 int old_max_packet_count = max_packet_count;
2445 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2446 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2447 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2448 /* Stop reading if we have the maximum number of packets;
2449 * When the -c option has not been used, max_packet_count
2450 * starts at 0, which practically means, never stop reading.
2451 * (unless we roll over max_packet_count ?)
2453 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2454 err = 0; /* This is not an error */
2460 /* Close the sequential I/O side, to free up memory it requires. */
2461 wtap_sequential_close(cf->wth);
2463 /* Allow the protocol dissectors to free up memory that they
2464 * don't need after the sequential run-through of the packets. */
2465 postseq_cleanup_all_protocols();
2467 max_packet_count = old_max_packet_count;
2469 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2470 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2471 cf->pd, fdata->cap_len, &err, &err_info)) {
2472 if (process_packet_second_pass(cf, fdata,
2473 &cf->pseudo_header, cf->pd,
2474 filtering_tap_listeners, tap_flags)) {
2475 /* Either there's no read filtering or this packet passed the
2476 filter, so, if we're writing to a capture file, write
2479 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2480 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2482 /* Error writing to a capture file */
2483 show_capture_file_io_error(save_file, err, FALSE);
2484 wtap_dump_close(pdh, &err);
2488 /* Stop reading if we have the maximum number of packets;
2489 * When the -c option has not been used, max_packet_count
2490 * starts at 0, which practically means, never stop reading.
2491 * (unless we roll over max_packet_count ?)
2493 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2494 err = 0; /* This is not an error */
2503 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2504 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2505 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2506 filtering_tap_listeners, tap_flags)) {
2507 /* Either there's no read filtering or this packet passed the
2508 filter, so, if we're writing to a capture file, write
2511 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2512 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2514 /* Error writing to a capture file */
2515 show_capture_file_io_error(save_file, err, FALSE);
2516 wtap_dump_close(pdh, &err);
2520 /* Stop reading if we have the maximum number of packets;
2521 * When the -c option has not been used, max_packet_count
2522 * starts at 0, which practically means, never stop reading.
2523 * (unless we roll over max_packet_count ?)
2525 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2526 err = 0; /* This is not an error */
2534 /* Print a message noting that the read failed somewhere along the line. */
2537 case WTAP_ERR_UNSUPPORTED_ENCAP:
2538 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2539 cf->filename, err_info);
2543 case WTAP_ERR_CANT_READ:
2544 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2548 case WTAP_ERR_SHORT_READ:
2549 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2553 case WTAP_ERR_BAD_RECORD:
2554 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2555 cf->filename, err_info);
2560 cmdarg_err("An error occurred while reading \"%s\": %s.",
2561 cf->filename, wtap_strerror(err));
2564 if (save_file != NULL) {
2565 /* Now close the capture file. */
2566 if (!wtap_dump_close(pdh, &err))
2567 show_capture_file_io_error(save_file, err, TRUE);
2570 if (save_file != NULL) {
2571 /* Now close the capture file. */
2572 if (!wtap_dump_close(pdh, &err))
2573 show_capture_file_io_error(save_file, err, TRUE);
2575 if (print_packet_info) {
2576 if (!write_finale()) {
2578 show_print_file_io_error(err);
2585 wtap_close(cf->wth);
2588 g_free(save_file_string);
2594 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2595 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2596 gboolean filtering_tap_listeners, guint tap_flags)
2599 gboolean create_proto_tree;
2604 /* Count this packet. */
2607 /* If we're not running a display filter and we're not printing any
2608 packet information, we don't need to do a dissection. This means
2609 that all packets can be marked as 'passed'. */
2612 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2614 /* If we're going to print packet information, or we're going to
2615 run a read filter, or we're going to process taps, set up to
2616 do a dissection and do so. */
2617 if (do_dissection) {
2618 if (print_packet_info && g_resolv_flags)
2619 /* Grab any resolved addresses */
2620 host_name_lookup_process(NULL);
2622 if (cf->rfcode || verbose || filtering_tap_listeners ||
2623 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2624 create_proto_tree = TRUE;
2626 create_proto_tree = FALSE;
2628 /* The protocol tree will be "visible", i.e., printed, only if we're
2629 printing packet details, which is true if we're printing stuff
2630 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2632 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2634 /* If we're running a read filter, prime the epan_dissect_t with that
2637 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2639 col_custom_prime_edt(&edt, &cf->cinfo);
2641 tap_queue_init(&edt);
2643 /* We only need the columns if either
2645 1) some tap needs the columns
2649 2) we're printing packet info but we're *not* verbose; in verbose
2650 mode, we print the protocol tree, not the protocol summary. */
2651 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2656 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2657 &first_ts, &prev_dis_ts, &prev_cap_ts);
2659 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2661 tap_push_tapped_queue(&edt);
2663 /* Run the read filter if we have one. */
2665 passed = dfilter_apply_edt(cf->rfcode, &edt);
2669 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2671 /* Process this packet. */
2672 if (print_packet_info) {
2673 /* We're printing packet information; print the information for
2676 print_packet(cf, &edt);
2678 print_packet(cf, NULL);
2680 /* The ANSI C standard does not appear to *require* that a line-buffered
2681 stream be flushed to the host environment whenever a newline is
2682 written, it just says that, on such a stream, characters "are
2683 intended to be transmitted to or from the host environment as a
2684 block when a new-line character is encountered".
2686 The Visual C++ 6.0 C implementation doesn't do what is intended;
2687 even if you set a stream to be line-buffered, it still doesn't
2688 flush the buffer at the end of every line.
2690 So, if the "-l" flag was specified, we flush the standard output
2691 at the end of a packet. This will do the right thing if we're
2692 printing packet summary lines, and, as we print the entire protocol
2693 tree for a single packet without waiting for anything to happen,
2694 it should be as good as line-buffered mode if we're printing
2695 protocol trees. (The whole reason for the "-l" flag in either
2696 tcpdump or TShark is to allow the output of a live capture to
2697 be piped to a program or script and to have that script see the
2698 information for the packet as soon as it's printed, rather than
2699 having to wait until a standard I/O buffer fills up. */
2703 if (ferror(stdout)) {
2704 show_print_file_io_error(errno);
2710 if (do_dissection) {
2711 epan_dissect_cleanup(&edt);
2712 frame_data_cleanup(&fdata);
2718 write_preamble(capture_file *cf)
2720 switch (output_action) {
2723 return print_preamble(print_stream, cf ? cf->filename : NULL);
2727 write_pdml_preamble(stdout);
2729 write_psml_preamble(stdout);
2730 return !ferror(stdout);
2733 write_fields_preamble(output_fields, stdout);
2734 return !ferror(stdout);
2737 g_assert_not_reached();
2743 get_line_buf(size_t len)
2745 static char *line_bufp = NULL;
2746 static size_t line_buf_len = 256;
2747 size_t new_line_buf_len;
2749 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2750 new_line_buf_len *= 2)
2752 if (line_bufp == NULL) {
2753 line_buf_len = new_line_buf_len;
2754 line_bufp = g_malloc(line_buf_len + 1);
2756 if (new_line_buf_len > line_buf_len) {
2757 line_buf_len = new_line_buf_len;
2758 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2765 print_columns(capture_file *cf)
2772 line_bufp = get_line_buf(256);
2775 for (i = 0; i < cf->cinfo.num_cols; i++) {
2776 switch (cf->cinfo.col_fmt[i]) {
2780 * Don't print this if we're doing a live capture from a network
2781 * interface - if we're doing a live capture, you won't be
2782 * able to look at the capture in the future (it's not being
2783 * saved anywhere), so the frame numbers are unlikely to be
2786 * (XXX - it might be nice to be able to save and print at
2787 * the same time, sort of like an "Update list of packets
2788 * in real time" capture in Wireshark.)
2790 if (global_capture_opts.iface != NULL)
2793 column_len = strlen(cf->cinfo.col_data[i]);
2796 line_bufp = get_line_buf(buf_offset + column_len);
2797 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2803 case COL_ABS_DATE_TIME: /* XXX - wider */
2804 column_len = strlen(cf->cinfo.col_data[i]);
2805 if (column_len < 10)
2807 line_bufp = get_line_buf(buf_offset + column_len);
2808 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2814 case COL_DEF_DL_SRC:
2815 case COL_RES_DL_SRC:
2816 case COL_UNRES_DL_SRC:
2817 case COL_DEF_NET_SRC:
2818 case COL_RES_NET_SRC:
2819 case COL_UNRES_NET_SRC:
2820 column_len = strlen(cf->cinfo.col_data[i]);
2821 if (column_len < 12)
2823 line_bufp = get_line_buf(buf_offset + column_len);
2824 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2830 case COL_DEF_DL_DST:
2831 case COL_RES_DL_DST:
2832 case COL_UNRES_DL_DST:
2833 case COL_DEF_NET_DST:
2834 case COL_RES_NET_DST:
2835 case COL_UNRES_NET_DST:
2836 column_len = strlen(cf->cinfo.col_data[i]);
2837 if (column_len < 12)
2839 line_bufp = get_line_buf(buf_offset + column_len);
2840 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2844 column_len = strlen(cf->cinfo.col_data[i]);
2845 line_bufp = get_line_buf(buf_offset + column_len);
2846 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2849 buf_offset += column_len;
2850 if (i != cf->cinfo.num_cols - 1) {
2852 * This isn't the last column, so we need to print a
2853 * separator between this column and the next.
2855 * If we printed a network source and are printing a
2856 * network destination of the same type next, separate
2857 * them with "->"; if we printed a network destination
2858 * and are printing a network source of the same type
2859 * next, separate them with "<-"; otherwise separate them
2862 * We add enough space to the buffer for " <- " or " -> ",
2863 * even if we're only adding " ".
2865 line_bufp = get_line_buf(buf_offset + 4);
2866 switch (cf->cinfo.col_fmt[i]) {
2871 switch (cf->cinfo.col_fmt[i + 1]) {
2876 strcat(line_bufp + buf_offset, " -> ");
2881 strcat(line_bufp + buf_offset, " ");
2887 case COL_DEF_DL_SRC:
2888 case COL_RES_DL_SRC:
2889 case COL_UNRES_DL_SRC:
2890 switch (cf->cinfo.col_fmt[i + 1]) {
2892 case COL_DEF_DL_DST:
2893 case COL_RES_DL_DST:
2894 case COL_UNRES_DL_DST:
2895 strcat(line_bufp + buf_offset, " -> ");
2900 strcat(line_bufp + buf_offset, " ");
2906 case COL_DEF_NET_SRC:
2907 case COL_RES_NET_SRC:
2908 case COL_UNRES_NET_SRC:
2909 switch (cf->cinfo.col_fmt[i + 1]) {
2911 case COL_DEF_NET_DST:
2912 case COL_RES_NET_DST:
2913 case COL_UNRES_NET_DST:
2914 strcat(line_bufp + buf_offset, " -> ");
2919 strcat(line_bufp + buf_offset, " ");
2928 switch (cf->cinfo.col_fmt[i + 1]) {
2933 strcat(line_bufp + buf_offset, " <- ");
2938 strcat(line_bufp + buf_offset, " ");
2944 case COL_DEF_DL_DST:
2945 case COL_RES_DL_DST:
2946 case COL_UNRES_DL_DST:
2947 switch (cf->cinfo.col_fmt[i + 1]) {
2949 case COL_DEF_DL_SRC:
2950 case COL_RES_DL_SRC:
2951 case COL_UNRES_DL_SRC:
2952 strcat(line_bufp + buf_offset, " <- ");
2957 strcat(line_bufp + buf_offset, " ");
2963 case COL_DEF_NET_DST:
2964 case COL_RES_NET_DST:
2965 case COL_UNRES_NET_DST:
2966 switch (cf->cinfo.col_fmt[i + 1]) {
2968 case COL_DEF_NET_SRC:
2969 case COL_RES_NET_SRC:
2970 case COL_UNRES_NET_SRC:
2971 strcat(line_bufp + buf_offset, " <- ");
2976 strcat(line_bufp + buf_offset, " ");
2983 strcat(line_bufp + buf_offset, " ");
2989 return print_line(print_stream, 0, line_bufp);
2993 print_packet(capture_file *cf, epan_dissect_t *edt)
2995 print_args_t print_args;
2998 /* Print the information in the protocol tree. */
2999 switch (output_action) {
3002 print_args.to_file = TRUE;
3003 print_args.format = print_format;
3004 print_args.print_summary = !verbose;
3005 print_args.print_hex = verbose && print_hex;
3006 print_args.print_formfeed = FALSE;
3007 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3009 /* init the packet range */
3010 packet_range_init(&print_args.range);
3012 if (!proto_tree_print(&print_args, edt, print_stream))
3015 /* "print_hex_data()" will put out a leading blank line, as well
3016 as a trailing one; print one here, to separate the packets,
3017 only if "print_hex_data()" won't be called. */
3018 if (!print_line(print_stream, 0, ""))
3024 proto_tree_write_pdml(edt, stdout);
3026 return !ferror(stdout);
3028 proto_tree_write_fields(output_fields, edt, stdout);
3030 return !ferror(stdout);
3033 /* Just fill in the columns. */
3034 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3036 /* Now print them. */
3037 switch (output_action) {
3040 if (!print_columns(cf))
3045 proto_tree_write_psml(edt, stdout);
3046 return !ferror(stdout);
3047 case WRITE_FIELDS: /*No non-verbose "fields" format */
3048 g_assert_not_reached();
3053 if (!print_hex_data(print_stream, edt))
3055 if (!print_line(print_stream, 0, ""))
3064 switch (output_action) {
3067 return print_finale(print_stream);
3071 write_pdml_finale(stdout);
3073 write_psml_finale(stdout);
3074 return !ferror(stdout);
3077 write_fields_finale(output_fields, stdout);
3078 return !ferror(stdout);
3081 g_assert_not_reached();
3087 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3091 char err_msg[2048+1];
3093 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3097 /* The open succeeded. Fill in the information for this file. */
3099 /* Cleanup all data structures used for dissection. */
3100 cleanup_dissection();
3101 /* Initialize all data structures used for dissection. */
3105 cf->f_datalen = 0; /* not used, but set it anyway */
3107 /* Set the file name because we need it to set the follow stream filter.
3108 XXX - is that still true? We need it for other reasons, though,
3110 cf->filename = g_strdup(fname);
3112 /* Indicate whether it's a permanent or temporary file. */
3113 cf->is_tempfile = is_tempfile;
3115 /* If it's a temporary capture buffer file, mark it as not saved. */
3116 cf->user_saved = !is_tempfile;
3118 cf->cd_t = wtap_file_type(cf->wth);
3120 cf->drops_known = FALSE;
3122 cf->snap = wtap_snapshot_length(cf->wth);
3123 if (cf->snap == 0) {
3124 /* Snapshot length not known. */
3125 cf->has_snap = FALSE;
3126 cf->snap = WTAP_MAX_PACKET_SIZE;
3128 cf->has_snap = TRUE;
3129 nstime_set_zero(&cf->elapsed_time);
3130 nstime_set_unset(&first_ts);
3131 nstime_set_unset(&prev_dis_ts);
3132 nstime_set_unset(&prev_cap_ts);
3134 cf->state = FILE_READ_IN_PROGRESS;
3139 g_snprintf(err_msg, sizeof err_msg,
3140 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3141 cmdarg_err("%s", err_msg);
3146 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3148 char *save_file_string;
3150 save_file_string = output_file_description(fname);
3155 cmdarg_err("Not all the packets could be written to the %s because there is "
3156 "no space left on the file system.",
3162 cmdarg_err("Not all the packets could be written to the %s because you are "
3163 "too close to, or over your disk quota.",
3168 case WTAP_ERR_CANT_CLOSE:
3169 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3173 case WTAP_ERR_SHORT_WRITE:
3174 cmdarg_err("Not all the packets could be written to the %s.",
3180 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3181 wtap_strerror(err));
3183 cmdarg_err("An error occurred while writing to the %s: %s.",
3184 save_file_string, wtap_strerror(err));
3188 g_free(save_file_string);
3192 show_print_file_io_error(int err)
3197 cmdarg_err("Not all the packets could be printed because there is "
3198 "no space left on the file system.");
3203 cmdarg_err("Not all the packets could be printed because you are "
3204 "too close to, or over your disk quota.");
3209 cmdarg_err("An error occurred while printing packets: %s.",
3216 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3220 static char errmsg_errno[1024+1];
3223 /* Wiretap error. */
3226 case WTAP_ERR_NOT_REGULAR_FILE:
3227 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3230 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3231 /* Seen only when opening a capture file for reading. */
3232 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3235 case WTAP_ERR_UNSUPPORTED:
3236 /* Seen only when opening a capture file for reading. */
3237 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3238 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3241 errmsg = errmsg_errno;
3244 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3245 /* Seen only when opening a capture file for writing. */
3246 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3247 "The file \"%%s\" is a pipe, and %s capture files can't be "
3248 "written to a pipe.", wtap_file_type_string(file_type));
3249 errmsg = errmsg_errno;
3252 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3253 /* Seen only when opening a capture file for writing. */
3254 errmsg = "TShark doesn't support writing capture files in that format.";
3257 case WTAP_ERR_UNSUPPORTED_ENCAP:
3259 errmsg = "TShark can't save this capture in that format.";
3261 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3262 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3265 errmsg = errmsg_errno;
3269 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3271 errmsg = "TShark can't save this capture in that format.";
3273 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3276 case WTAP_ERR_BAD_RECORD:
3277 /* Seen only when opening a capture file for reading. */
3278 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3279 "The file \"%%s\" appears to be damaged or corrupt.\n"
3282 errmsg = errmsg_errno;
3285 case WTAP_ERR_CANT_OPEN:
3287 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3289 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3292 case WTAP_ERR_SHORT_READ:
3293 errmsg = "The file \"%s\" appears to have been cut short"
3294 " in the middle of a packet or other data.";
3297 case WTAP_ERR_SHORT_WRITE:
3298 errmsg = "A full header couldn't be written to the file \"%s\".";
3302 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3303 "The file \"%%s\" could not be %s: %s.",
3304 for_writing ? "created" : "opened",
3305 wtap_strerror(err));
3306 errmsg = errmsg_errno;
3310 errmsg = file_open_error_message(err, for_writing);
3315 * Open/create errors are reported with an console message in TShark.
3318 open_failure_message(const char *filename, int err, gboolean for_writing)
3320 fprintf(stderr, "tshark: ");
3321 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3322 fprintf(stderr, "\n");
3327 * General errors are reported with an console message in TShark.
3330 failure_message(const char *msg_format, va_list ap)
3332 fprintf(stderr, "tshark: ");
3333 vfprintf(stderr, msg_format, ap);
3334 fprintf(stderr, "\n");
3338 * Read errors are reported with an console message in TShark.
3341 read_failure_message(const char *filename, int err)
3343 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3344 filename, strerror(err));
3348 * Write errors are reported with an console message in TShark.
3351 write_failure_message(const char *filename, int err)
3353 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3354 filename, strerror(err));
3358 * Report an error in command-line arguments.
3361 cmdarg_err(const char *fmt, ...)
3366 failure_message(fmt, ap);
3371 * Report additional information for an error in command-line arguments.
3374 cmdarg_err_cont(const char *fmt, ...)
3379 vfprintf(stderr, fmt, ap);
3380 fprintf(stderr, "\n");