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, " -u s|hms output format of seconds (def: s: seconds)\n");
287 fprintf(output, " -l flush standard output after each packet\n");
288 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
289 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
290 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
292 fprintf(output, "\n");
293 fprintf(output, "Miscellaneous:\n");
294 fprintf(output, " -h display this help and exit\n");
295 fprintf(output, " -v display version info and exit\n");
296 fprintf(output, " -o <name>:<value> ... override preference setting\n");
297 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
301 * For a dissector table, print on the stream described by output,
302 * its short name (which is what's used in the "-d" option) and its
306 display_dissector_table_names(const char *table_name, const char *ui_name,
309 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
313 * For a dissector handle, print on the stream described by output,
314 * the filter name (which is what's used in the "-d" option) and the full
315 * name for the protocol that corresponds to this handle.
318 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
321 const gchar* proto_filter_name;
322 const gchar* proto_ui_name;
324 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
326 if (proto_id != -1) {
327 proto_filter_name = proto_get_protocol_filter_name(proto_id);
328 proto_ui_name = proto_get_protocol_name(proto_id);
329 g_assert(proto_filter_name != NULL);
330 g_assert(proto_ui_name != NULL);
332 fprintf((FILE *)output, "\t%s (%s)\n",
339 * The protocol_name_search structure is used by find_protocol_name_func()
340 * to pass parameters and store results
342 struct protocol_name_search{
343 gchar *searched_name; /* Protocol filter name we are looking for */
344 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
345 guint nb_match; /* How many dissectors matched searched_name */
347 typedef struct protocol_name_search *protocol_name_search_t;
350 * This function parses all dissectors associated with a table to find the
351 * one whose protocol has the specified filter name. It is called
352 * as a reference function in a call to dissector_table_foreach_handle.
353 * The name we are looking for, as well as the results, are stored in the
354 * protocol_name_search struct pointed to by user_data.
355 * If called using dissector_table_foreach_handle, we actually parse the
356 * whole list of dissectors.
359 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
363 const gchar *protocol_filter_name;
364 protocol_name_search_t search_info;
368 search_info = (protocol_name_search_t)user_data;
370 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
371 if (proto_id != -1) {
372 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
373 g_assert(protocol_filter_name != NULL);
374 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
376 if (search_info->nb_match == 0) {
377 /* Record this handle only if this is the first match */
378 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
380 search_info->nb_match++;
386 * Print all layer type names supported.
387 * We send the output to the stream described by the handle output.
391 fprint_all_layer_types(FILE *output)
394 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
398 * Print all protocol names supported for a specific layer type.
399 * table_name contains the layer type name in which the search is performed.
400 * We send the output to the stream described by the handle output.
404 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
407 dissector_table_foreach_handle(table_name,
408 display_dissector_names,
413 * The function below parses the command-line parameters for the decode as
414 * feature (a string pointer by cl_param).
415 * It checks the format of the command-line, searches for a matching table
416 * and dissector. If a table/dissector match is not found, we display a
417 * summary of the available tables/dissectors (on stderr) and return FALSE.
418 * If everything is fine, we get the "Decode as" preference activated,
419 * then we return TRUE.
422 add_decode_as(const gchar *cl_param)
426 gchar *decoded_param;
427 gchar *remaining_param;
429 gchar *dissector_str;
430 dissector_handle_t dissector_matching;
431 dissector_table_t table_matching;
432 ftenum_t dissector_table_selector_type;
433 struct protocol_name_search user_protocol_name;
435 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
438 decoded_param = g_strdup(cl_param);
439 g_assert(decoded_param);
442 /* The lines below will parse this string (modifying it) to extract all
443 necessary information. Note that decoded_param is still needed since
444 strings are not copied - we just save pointers. */
446 /* This section extracts a layer type (table_name) from decoded_param */
447 table_name = decoded_param; /* Layer type string starts from beginning */
449 remaining_param = strchr(table_name, '=');
450 if (remaining_param == NULL) {
451 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
452 /* If the argument does not follow the template, carry on anyway to check
453 if the table name is at least correct. If remaining_param is NULL,
454 we'll exit anyway further down */
457 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
460 /* Remove leading and trailing spaces from the table name */
461 while ( table_name[0] == ' ' )
463 while ( table_name[strlen(table_name) - 1] == ' ' )
464 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
466 /* The following part searches a table matching with the layer type specified */
467 table_matching = NULL;
469 /* Look for the requested table */
470 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
471 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
474 table_matching = find_dissector_table(table_name);
475 if (!table_matching) {
476 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
480 if (!table_matching) {
481 /* Display a list of supported layer types to help the user, if the
482 specified layer type was not found */
483 cmdarg_err("Valid layer types are:");
484 fprint_all_layer_types(stderr);
486 if (remaining_param == NULL || !table_matching) {
487 /* Exit if the layer type was not found, or if no '=' separator was found
489 g_free(decoded_param);
493 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
494 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
497 remaining_param++; /* Move to the second '=' */
498 *remaining_param = '\0'; /* Remove the second '=' */
500 remaining_param++; /* Position after the layer type string */
502 /* This section extracts a selector value (selector_str) from decoded_param */
504 selector_str = remaining_param; /* Next part starts with the selector number */
506 remaining_param = strchr(selector_str, ',');
507 if (remaining_param == NULL) {
508 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
509 /* If the argument does not follow the template, carry on anyway to check
510 if the selector value is at least correct. If remaining_param is NULL,
511 we'll exit anyway further down */
514 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
517 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
519 switch (dissector_table_selector_type) {
525 /* The selector for this table is an unsigned number. Parse it as such.
526 There's no need to remove leading and trailing spaces from the
527 selector number string, because sscanf will do that for us. */
528 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
529 cmdarg_err("Invalid selector number \"%s\"", selector_str);
530 g_free(decoded_param);
538 /* The selector for this table is a string. */
542 /* There are currently no dissector tables with any types other
543 than the ones listed above. */
544 g_assert_not_reached();
547 if (remaining_param == NULL) {
548 /* Exit if no ',' separator was found (see above) */
549 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
550 fprint_all_protocols_for_layer_types(stderr, table_name);
551 g_free(decoded_param);
555 remaining_param++; /* Position after the selector number string */
557 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
559 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
561 /* Remove leading and trailing spaces from the dissector name */
562 while ( dissector_str[0] == ' ' )
564 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
565 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
567 dissector_matching = NULL;
569 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
570 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 */
571 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
574 user_protocol_name.nb_match = 0;
575 user_protocol_name.searched_name = dissector_str;
576 user_protocol_name.matched_handle = NULL;
578 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 */
580 if (user_protocol_name.nb_match != 0) {
581 dissector_matching = user_protocol_name.matched_handle;
582 if (user_protocol_name.nb_match > 1) {
583 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
587 /* OK, check whether the problem is that there isn't any such
588 protocol, or that there is but it's not specified as a protocol
589 that's valid for that dissector table.
590 Note, we don't exit here, but dissector_matching will remain NULL,
592 if (proto_get_id_by_filter_name(dissector_str) == -1) {
593 /* No such protocol */
594 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
596 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
597 dissector_str, table_name);
602 if (!dissector_matching) {
603 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
604 fprint_all_protocols_for_layer_types(stderr, table_name);
605 g_free(decoded_param);
609 /* This is the end of the code that parses the command-line options.
610 All information is now stored in the variables:
614 The above variables that are strings are still pointing to areas within
615 decoded_parm. decoded_parm thus still needs to be kept allocated in
616 until we stop needing these variables
617 decoded_param will be deallocated at each exit point of this function */
620 /* We now have a pointer to the handle for the requested dissector
621 (requested protocol) inside the variable dissector_matching */
622 switch (dissector_table_selector_type) {
628 /* The selector for this table is an unsigned number. */
629 dissector_change(table_name, selector, dissector_matching);
635 /* The selector for this table is a string. */
636 dissector_change_string(table_name, selector_str, dissector_matching);
640 /* There are currently no dissector tables with any types other
641 than the ones listed above. */
642 g_assert_not_reached();
644 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
649 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
650 const gchar *message, gpointer user_data)
652 /* ignore log message, if log_level isn't interesting based
653 upon the console log preferences.
654 If the preferences haven't been loaded loaded yet, display the
657 The default console_log_level preference value is such that only
658 ERROR, CRITICAL and WARNING level messages are processed;
659 MESSAGE, INFO and DEBUG level messages are ignored.
661 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
662 ERROR and CRITICAL level messages so the current code is a behavioral
663 change. The current behavior is the same as in Wireshark.
665 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
666 prefs.console_log_level != 0) {
670 g_log_default_handler(log_domain, log_level, message, user_data);
675 output_file_description(const char *fname)
677 char *save_file_string;
679 /* Get a string that describes what we're writing to */
680 if (strcmp(fname, "-") == 0) {
681 /* We're writing to the standard output */
682 save_file_string = g_strdup("standard output");
684 /* We're writing to a file with the name in save_file */
685 save_file_string = g_strdup_printf("file \"%s\"", fname);
687 return save_file_string;
691 print_current_user(void) {
692 gchar *cur_user, *cur_group;
693 if (started_with_special_privs()) {
694 cur_user = get_cur_username();
695 cur_group = get_cur_groupname();
696 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
697 cur_user, cur_group);
700 if (running_with_special_privs()) {
701 fprintf(stderr, " This could be dangerous.");
703 fprintf(stderr, "\n");
708 check_capture_privs(void) {
711 /* Warn the user if npf.sys isn't loaded. */
712 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
713 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
714 "capturing or\nlisting interfaces.\n");
720 show_version(GString *comp_info_str, GString *runtime_info_str)
722 printf("TShark " VERSION "%s\n"
729 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
730 runtime_info_str->str);
734 main(int argc, char *argv[])
736 char *init_progfile_dir_error;
738 gboolean arg_error = FALSE;
744 char *gpf_path, *pf_path;
745 char *gdp_path, *dp_path;
746 int gpf_open_errno, gpf_read_errno;
747 int pf_open_errno, pf_read_errno;
748 int gdp_open_errno, gdp_read_errno;
749 int dp_open_errno, dp_read_errno;
752 gboolean list_link_layer_types = FALSE;
753 gboolean start_capture = FALSE;
756 gboolean capture_option_specified = FALSE;
758 gboolean quiet = FALSE;
759 int out_file_type = WTAP_FILE_PCAP;
760 gchar *cf_name = NULL, *rfilter = NULL;
761 #ifdef HAVE_PCAP_OPEN_DEAD
762 struct bpf_program fcode;
764 dfilter_t *rfcode = NULL;
767 GLogLevelFlags log_flags;
770 #define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:K:lLnN:o:pPqr:R:s:St:T:u:vVw:xX:y:z:"
773 #define OPTSTRING_WIN32 "B:"
775 #define OPTSTRING_WIN32 ""
778 #define OPTSTRING_WIN32 ""
779 #endif /* HAVE_LIBPCAP */
781 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
784 * Get credential information for later use.
786 get_credential_info();
789 * Attempt to get the pathname of the executable file.
791 init_progfile_dir_error = init_progfile_dir(argv[0], main);
792 if (init_progfile_dir_error != NULL) {
793 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
794 init_progfile_dir_error);
798 * In order to have the -X opts assigned before the wslua machine starts
799 * we need to call getopts before epan_init() gets called.
802 optind_initial = optind;
804 while ((opt = getopt(argc, argv, optstring)) != -1) {
806 case 'C': /* Configuration Profile */
807 if (profile_exists (optarg)) {
808 set_profile_name (optarg);
810 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
822 optind = optind_initial;
827 /** Send All g_log messages to our own handler **/
831 G_LOG_LEVEL_CRITICAL|
836 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
838 g_log_set_handler(NULL,
840 tshark_log_handler, NULL /* user_data */);
841 g_log_set_handler(LOG_DOMAIN_MAIN,
843 tshark_log_handler, NULL /* user_data */);
846 g_log_set_handler(LOG_DOMAIN_CAPTURE,
848 tshark_log_handler, NULL /* user_data */);
849 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
851 tshark_log_handler, NULL /* user_data */);
854 initialize_funnel_ops();
857 capture_opts_init(&global_capture_opts, &cfile);
860 timestamp_set_type(TS_RELATIVE);
861 timestamp_set_precision(TS_PREC_AUTO);
863 /* Register all dissectors; we must do this before checking for the
864 "-G" flag, as the "-G" flag dumps information registered by the
865 dissectors, and we must do it before we read the preferences, in
866 case any dissectors register preferences. */
867 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
868 failure_message, open_failure_message, read_failure_message,
869 write_failure_message);
871 /* Register all tap listeners; we do this before we parse the arguments,
872 as the "-z" argument can specify a registered tap. */
874 /* we register the plugin taps before the other taps because
875 stats_tree taps plugins will be registered as tap listeners
876 by stats_tree_stat.c and need to registered before that */
878 register_all_plugin_tap_listeners();
880 register_all_tap_listeners();
882 /* Now register the preferences for any non-dissector modules.
883 We must do that before we read the preferences as well. */
884 prefs_register_modules();
886 /* If invoked with the "-G" flag, we dump out information based on
887 the argument to the "-G" flag; if no argument is specified,
888 for backwards compatibility we dump out a glossary of display
891 XXX - we do this here, for now, to support "-G" with no arguments.
892 If none of our build or other processes uses "-G" with no arguments,
893 we can just process it with the other arguments. */
894 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
895 proto_initialize_all_prefixes();
898 proto_registrar_dump_fields(1);
900 if (strcmp(argv[2], "fields") == 0)
901 proto_registrar_dump_fields(1);
902 else if (strcmp(argv[2], "fields2") == 0)
903 proto_registrar_dump_fields(2);
904 else if (strcmp(argv[2], "fields3") == 0)
905 proto_registrar_dump_fields(3);
906 else if (strcmp(argv[2], "protocols") == 0)
907 proto_registrar_dump_protocols();
908 else if (strcmp(argv[2], "values") == 0)
909 proto_registrar_dump_values();
910 else if (strcmp(argv[2], "decodes") == 0)
911 dissector_dump_decodes();
912 else if (strcmp(argv[2], "defaultprefs") == 0)
914 else if (strcmp(argv[2], "currentprefs") == 0) {
915 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
916 &pf_open_errno, &pf_read_errno, &pf_path);
919 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
926 /* Set the C-language locale to the native environment. */
927 setlocale(LC_ALL, "");
929 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
930 &pf_open_errno, &pf_read_errno, &pf_path);
931 if (gpf_path != NULL) {
932 if (gpf_open_errno != 0) {
933 cmdarg_err("Can't open global preferences file \"%s\": %s.",
934 pf_path, strerror(gpf_open_errno));
936 if (gpf_read_errno != 0) {
937 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
938 pf_path, strerror(gpf_read_errno));
941 if (pf_path != NULL) {
942 if (pf_open_errno != 0) {
943 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
944 strerror(pf_open_errno));
946 if (pf_read_errno != 0) {
947 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
948 pf_path, strerror(pf_read_errno));
954 /* Set the name resolution code's flags from the preferences. */
955 g_resolv_flags = prefs_p->name_resolve;
957 /* Read the disabled protocols file. */
958 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
959 &dp_path, &dp_open_errno, &dp_read_errno);
960 if (gdp_path != NULL) {
961 if (gdp_open_errno != 0) {
962 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
963 gdp_path, strerror(gdp_open_errno));
965 if (gdp_read_errno != 0) {
966 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
967 gdp_path, strerror(gdp_read_errno));
971 if (dp_path != NULL) {
972 if (dp_open_errno != 0) {
974 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
975 strerror(dp_open_errno));
977 if (dp_read_errno != 0) {
979 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
980 strerror(dp_read_errno));
985 check_capture_privs();
987 cap_file_init(&cfile);
989 /* Print format defaults to this. */
990 print_format = PR_FMT_TEXT;
992 output_fields = output_fields_new();
994 /* Now get our args */
995 while ((opt = getopt(argc, argv, optstring)) != -1) {
997 case 'a': /* autostop criteria */
998 case 'b': /* Ringbuffer option */
999 case 'c': /* Capture x packets */
1000 case 'f': /* capture filter */
1001 case 'i': /* Use interface x */
1002 case 'p': /* Don't capture in promiscuous mode */
1003 case 's': /* Set the snapshot (capture) length */
1004 case 'w': /* Write to capture file x */
1005 case 'y': /* Set the pcap data link type */
1007 case 'B': /* Buffer size */
1010 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1015 capture_option_specified = TRUE;
1020 /* Configuration profile settings were already processed just ignore them this time*/
1022 case 'd': /* Decode as rule */
1023 if (!add_decode_as(optarg))
1026 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1027 case 'K': /* Kerberos keytab file */
1028 read_keytab_file(optarg);
1031 case 'D': /* Print a list of capture devices and exit */
1033 status = capture_opts_list_interfaces(FALSE);
1036 capture_option_specified = TRUE;
1042 output_fields_add(output_fields, optarg);
1046 if(!output_fields_set_option(output_fields, optarg)) {
1047 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1048 output_fields_list_options(stderr);
1053 out_file_type = wtap_short_string_to_file_type(optarg);
1054 if (out_file_type < 0) {
1055 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1056 list_capture_types();
1060 case 'h': /* Print help and exit */
1064 case 'l': /* "Line-buffer" standard output */
1065 /* This isn't line-buffering, strictly speaking, it's just
1066 flushing the standard output after the information for
1067 each packet is printed; however, that should be good
1068 enough for all the purposes to which "-l" is put (and
1069 is probably actually better for "-V", as it does fewer
1072 See the comment in "process_packet()" for an explanation of
1073 why we do that, and why we don't just use "setvbuf()" to
1074 make the standard output line-buffered (short version: in
1075 Windows, "line-buffered" is the same as "fully-buffered",
1076 and the output buffer is only flushed when it fills up). */
1077 line_buffered = TRUE;
1079 case 'L': /* Print list of link-layer types and exit */
1081 list_link_layer_types = TRUE;
1083 capture_option_specified = TRUE;
1087 #if GLIB_CHECK_VERSION(2,10,0)
1088 case 'P': /* Perform two pass analysis */
1089 perform_two_pass_analysis = TRUE;
1092 case 'n': /* No name resolution */
1093 g_resolv_flags = RESOLV_NONE;
1095 case 'N': /* Select what types of addresses/port #s to resolve */
1096 if (g_resolv_flags == RESOLV_ALL)
1097 g_resolv_flags = RESOLV_NONE;
1098 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1099 if (badopt != '\0') {
1100 cmdarg_err("-N specifies unknown resolving option '%c';",
1102 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1106 case 'o': /* Override preference from command line */
1107 switch (prefs_set_pref(optarg)) {
1112 case PREFS_SET_SYNTAX_ERR:
1113 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1117 case PREFS_SET_NO_SUCH_PREF:
1118 case PREFS_SET_OBSOLETE:
1119 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1124 case 'q': /* Quiet */
1127 case 'r': /* Read capture file x */
1128 cf_name = g_strdup(optarg);
1130 case 'R': /* Read file filter */
1133 case 'S': /* show packets in real time */
1134 print_packet_info = TRUE;
1136 case 't': /* Time stamp type */
1137 if (strcmp(optarg, "r") == 0)
1138 timestamp_set_type(TS_RELATIVE);
1139 else if (strcmp(optarg, "a") == 0)
1140 timestamp_set_type(TS_ABSOLUTE);
1141 else if (strcmp(optarg, "ad") == 0)
1142 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1143 else if (strcmp(optarg, "d") == 0)
1144 timestamp_set_type(TS_DELTA);
1145 else if (strcmp(optarg, "dd") == 0)
1146 timestamp_set_type(TS_DELTA_DIS);
1147 else if (strcmp(optarg, "e") == 0)
1148 timestamp_set_type(TS_EPOCH);
1150 cmdarg_err("Invalid time stamp type \"%s\"",
1152 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1153 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1157 case 'T': /* printing Type */
1158 if (strcmp(optarg, "text") == 0) {
1159 output_action = WRITE_TEXT;
1160 print_format = PR_FMT_TEXT;
1161 } else if (strcmp(optarg, "ps") == 0) {
1162 output_action = WRITE_TEXT;
1163 print_format = PR_FMT_PS;
1164 } else if (strcmp(optarg, "pdml") == 0) {
1165 output_action = WRITE_XML;
1167 } else if (strcmp(optarg, "psml") == 0) {
1168 output_action = WRITE_XML;
1170 } else if(strcmp(optarg, "fields") == 0) {
1171 output_action = WRITE_FIELDS;
1172 verbose = TRUE; /* Need full tree info */
1174 cmdarg_err("Invalid -T parameter.");
1175 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1179 case 'u': /* Seconds type */
1180 if (strcmp(optarg, "s") == 0)
1181 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
1182 else if (strcmp(optarg, "hms") == 0)
1183 timestamp_set_seconds_type(TS_SECONDS_HOUR_MIN_SEC);
1185 cmdarg_err("Invalid seconds type \"%s\"", optarg);
1186 cmdarg_err_cont("It must be \"s\" for seconds or \"hms\" for hours, minutes and seconds.");
1190 case 'v': /* Show version and exit */
1192 GString *comp_info_str;
1193 GString *runtime_info_str;
1194 /* Assemble the compile-time version information string */
1195 comp_info_str = g_string_new("Compiled ");
1196 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1198 /* Assemble the run-time version information string */
1199 runtime_info_str = g_string_new("Running ");
1200 get_runtime_version_info(runtime_info_str, NULL);
1201 show_version(comp_info_str, runtime_info_str);
1202 g_string_free(comp_info_str, TRUE);
1203 g_string_free(runtime_info_str, TRUE);
1207 case 'V': /* Verbose */
1209 /* The user asked for a verbose output, so let's ensure they get it,
1210 * even if they're writing to a file.
1212 print_packet_info = TRUE;
1214 case 'x': /* Print packet data in hex (and ASCII) */
1216 /* The user asked for hex output, so let's ensure they get it,
1217 * even if they're writing to a file.
1219 print_packet_info = TRUE;
1224 /* We won't call the init function for the stat this soon
1225 as it would disallow MATE's fields (which are registered
1226 by the preferences set callback) from being used as
1227 part of a tap filter. Instead, we just add the argument
1228 to a list of stat arguments. */
1229 if (!process_stat_cmd_arg(optarg)) {
1230 cmdarg_err("invalid -z argument.");
1231 cmdarg_err_cont(" -z argument must be one of :");
1232 list_stat_cmd_args();
1237 case '?': /* Bad flag - print usage message */
1240 list_capture_types();
1250 /* If we specified output fields, but not the output field type... */
1251 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1252 cmdarg_err("Output fields were specified with \"-e\", "
1253 "but \"-Tfields\" was not specified.");
1255 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1256 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1257 "specified with \"-e\".");
1262 /* If no capture filter or read filter has been specified, and there are
1263 still command-line arguments, treat them as the tokens of a capture
1264 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1265 flag was specified. */
1266 if (optind < argc) {
1267 if (cf_name != NULL) {
1268 if (rfilter != NULL) {
1269 cmdarg_err("Read filters were specified both with \"-R\" "
1270 "and with additional command-line arguments");
1273 rfilter = get_args_as_string(argc, argv, optind);
1276 if (global_capture_opts.has_cfilter) {
1277 cmdarg_err("Capture filters were specified both with \"-f\""
1278 " and with additional command-line arguments");
1281 global_capture_opts.has_cfilter = TRUE;
1282 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1284 capture_option_specified = TRUE;
1290 if (!global_capture_opts.saving_to_file) {
1291 /* We're not saving the capture to a file; if "-q" wasn't specified,
1292 we should print packet information */
1294 print_packet_info = TRUE;
1296 /* We're saving to a file; if we're writing to the standard output.
1297 and we'll also be writing dissected packets to the standard
1298 output, reject the request. At best, we could redirect that
1299 to the standard error; we *can't* write both to the standard
1300 output and have either of them be useful. */
1301 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1302 cmdarg_err("You can't write both raw packet data and dissected packets"
1303 " to the standard output.");
1308 /* We're not saving the capture to a file; if "-q" wasn't specified,
1309 we should print packet information */
1311 print_packet_info = TRUE;
1314 #ifndef HAVE_LIBPCAP
1315 if (capture_option_specified)
1316 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1323 /* We don't support capture filters when reading from a capture file
1324 (the BPF compiler doesn't support all link-layer types that we
1325 support in capture files we read). */
1327 if (cf_name != NULL) {
1328 if (global_capture_opts.has_cfilter) {
1329 cmdarg_err("Only read filters, not capture filters, "
1330 "can be specified when reading a capture file.");
1337 if (output_action != WRITE_TEXT) {
1338 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1344 if (list_link_layer_types) {
1345 /* We're supposed to list the link-layer types for an interface;
1346 did the user also specify a capture file to be read? */
1348 /* Yes - that's bogus. */
1349 cmdarg_err("You can't specify -L and a capture file to be read.");
1352 /* No - did they specify a ring buffer option? */
1353 if (global_capture_opts.multi_files_on) {
1354 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1360 * "-r" was specified, so we're reading a capture file.
1361 * Capture options don't apply here.
1363 if (global_capture_opts.multi_files_on) {
1364 cmdarg_err("Multiple capture files requested, but "
1365 "a capture isn't being done.");
1368 if (global_capture_opts.has_file_duration) {
1369 cmdarg_err("Switching capture files after a time interval was specified, but "
1370 "a capture isn't being done.");
1373 if (global_capture_opts.has_ring_num_files) {
1374 cmdarg_err("A ring buffer of capture files was specified, but "
1375 "a capture isn't being done.");
1378 if (global_capture_opts.has_autostop_files) {
1379 cmdarg_err("A maximum number of capture files was specified, but "
1380 "a capture isn't being done.");
1384 /* Note: TShark now allows the restriction of a _read_ file by packet count
1385 * and byte count as well as a write file. Other autostop options remain valid
1386 * only for a write file.
1388 if (global_capture_opts.has_autostop_duration) {
1389 cmdarg_err("A maximum capture time was specified, but "
1390 "a capture isn't being done.");
1395 * "-r" wasn't specified, so we're doing a live capture.
1397 if (global_capture_opts.saving_to_file) {
1398 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1400 /* When capturing, we only support writing libpcap format. */
1401 if (out_file_type != WTAP_FILE_PCAP) {
1402 cmdarg_err("Live captures can only be saved in libpcap format.");
1405 if (global_capture_opts.multi_files_on) {
1406 /* Multiple-file mode doesn't work under certain conditions:
1407 a) it doesn't work if you're writing to the standard output;
1408 b) it doesn't work if you're writing to a pipe;
1410 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1411 cmdarg_err("Multiple capture files requested, but "
1412 "the capture is being written to the standard output.");
1415 if (global_capture_opts.output_to_pipe) {
1416 cmdarg_err("Multiple capture files requested, but "
1417 "the capture file is a pipe.");
1420 if (!global_capture_opts.has_autostop_filesize &&
1421 !global_capture_opts.has_file_duration) {
1422 cmdarg_err("Multiple capture files requested, but "
1423 "no maximum capture file size or duration was specified.");
1428 /* They didn't specify a "-w" flag, so we won't be saving to a
1429 capture file. Check for options that only make sense if
1430 we're saving to a file. */
1431 if (global_capture_opts.has_autostop_filesize) {
1432 cmdarg_err("Maximum capture file size specified, but "
1433 "capture isn't being saved to a file.");
1436 if (global_capture_opts.multi_files_on) {
1437 cmdarg_err("Multiple capture files requested, but "
1438 "the capture isn't being saved to a file.");
1447 /* Start windows sockets */
1448 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1451 /* Notify all registered modules that have had any of their preferences
1452 changed either from one of the preferences file or from the command
1453 line that their preferences have changed. */
1456 /* At this point MATE will have registered its field array so we can
1457 have a tap filter with one of MATE's late-registered fields as part
1458 of the filter. We can now process all the "-z" arguments. */
1459 start_requested_stats();
1461 /* disabled protocols as per configuration file */
1462 if (gdp_path == NULL && dp_path == NULL) {
1463 set_disabled_protos_list();
1466 /* Build the column format array */
1467 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
1470 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1471 capture_opts_trim_ring_num_files(&global_capture_opts);
1474 if (rfilter != NULL) {
1475 if (!dfilter_compile(rfilter, &rfcode)) {
1476 cmdarg_err("%s", dfilter_error_msg);
1478 #ifdef HAVE_PCAP_OPEN_DEAD
1482 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1484 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1486 " Note: That display filter code looks like a valid capture filter;");
1488 " maybe you mixed them up?");
1497 cfile.rfcode = rfcode;
1499 if (print_packet_info) {
1500 /* If we're printing as text or PostScript, we have
1501 to create a print stream. */
1502 if (output_action == WRITE_TEXT) {
1503 switch (print_format) {
1506 print_stream = print_stream_text_stdio_new(stdout);
1510 print_stream = print_stream_ps_stdio_new(stdout);
1514 g_assert_not_reached();
1519 /* We have to dissect each packet if:
1521 we're printing information about each packet;
1523 we're using a read filter on the packets;
1525 we're using any taps. */
1526 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1530 * We're reading a capture file.
1534 * Immediately relinquish any special privileges we have; we must not
1535 * be allowed to read any capture files the user running TShark
1538 relinquish_special_privs_perm();
1539 print_current_user();
1541 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1546 /* Set timestamp precision; there should arguably be a command-line
1547 option to let the user set this. */
1548 switch(wtap_file_tsprecision(cfile.wth)) {
1549 case(WTAP_FILE_TSPREC_SEC):
1550 timestamp_set_precision(TS_PREC_AUTO_SEC);
1552 case(WTAP_FILE_TSPREC_DSEC):
1553 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1555 case(WTAP_FILE_TSPREC_CSEC):
1556 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1558 case(WTAP_FILE_TSPREC_MSEC):
1559 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1561 case(WTAP_FILE_TSPREC_USEC):
1562 timestamp_set_precision(TS_PREC_AUTO_USEC);
1564 case(WTAP_FILE_TSPREC_NSEC):
1565 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1568 g_assert_not_reached();
1571 /* Process the packets in the file */
1573 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1574 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1575 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1577 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1584 /* No capture file specified, so we're supposed to do a live capture
1585 (or get a list of link-layer types for a live capture device);
1586 do we have support for live captures? */
1593 cmdarg_err("WinPcap couldn't be found.");
1594 detailed_err = cant_load_winpcap_err("TShark");
1595 cmdarg_err_cont("%s", detailed_err);
1596 g_free(detailed_err);
1601 /* trim the interface name and exit if that failed */
1602 if (!capture_opts_trim_iface(&global_capture_opts,
1603 (prefs_p->capture_device) ? get_if_name(prefs_p->capture_device) : NULL)) {
1607 /* if requested, list the link layer types and exit */
1608 if (list_link_layer_types) {
1609 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1613 if (print_packet_info) {
1614 if (!write_preamble(NULL)) {
1616 show_print_file_io_error(err);
1619 } else if (!quiet) {
1621 * We're not printing information for each packet, and the user
1622 * didn't ask us not to print a count of packets as they arrive,
1623 * so print that count so the user knows that packets are arriving.
1625 * XXX - what if the user wants to do a live capture, doesn't want
1626 * to save it to a file, doesn't want information printed for each
1627 * packet, does want some "-z" statistic, and wants packet counts
1628 * so they know whether they're seeing any packets?
1630 print_packet_counts = TRUE;
1633 /* For now, assume libpcap gives microsecond precision. */
1634 timestamp_set_precision(TS_PREC_AUTO_USEC);
1638 if (print_packet_info) {
1639 if (!write_finale()) {
1641 show_print_file_io_error(err);
1645 /* No - complain. */
1646 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1653 #if GLIB_CHECK_VERSION(2,10,0)
1654 if (cfile.plist_start != NULL)
1655 g_slice_free_chain(frame_data, cfile.plist_start, next);
1658 draw_tap_listeners(TRUE);
1659 funnel_dump_all_text_windows();
1662 output_fields_free(output_fields);
1663 output_fields = NULL;
1668 /*#define USE_BROKEN_G_MAIN_LOOP*/
1670 #ifdef USE_BROKEN_G_MAIN_LOOP
1673 gboolean loop_running = FALSE;
1675 guint32 packet_count = 0;
1678 /* XXX - move to the right position / file */
1679 /* read from a pipe (callback) */
1680 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1682 typedef struct pipe_input_tag {
1686 pipe_input_cb_t input_cb;
1687 guint pipe_input_id;
1689 GStaticMutex callback_running;
1693 static pipe_input_t pipe_input;
1696 /* The timer has expired, see if there's stuff to read from the pipe,
1697 if so, do the callback */
1699 pipe_timer_cb(gpointer data)
1703 gboolean result, result1;
1705 pipe_input_t *pipe_input = data;
1706 gint iterations = 0;
1709 g_static_mutex_lock (&pipe_input->callback_running);
1711 /* try to read data from the pipe only 5 times, to avoid blocking */
1712 while(iterations < 5) {
1713 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1715 /* Oddly enough although Named pipes don't work on win9x,
1716 PeekNamedPipe does !!! */
1717 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1718 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1720 /* Get the child process exit status */
1721 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1724 /* If the Peek returned an error, or there are bytes to be read
1725 or the childwatcher thread has terminated then call the normal
1727 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1729 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1731 /* And call the real handler */
1732 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1733 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1734 /* pipe closed, return false so that the timer is stopped */
1735 g_static_mutex_unlock (&pipe_input->callback_running);
1740 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1741 /* No data, stop now */
1748 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1750 g_static_mutex_unlock (&pipe_input->callback_running);
1752 /* we didn't stopped the timer, so let it run */
1759 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1762 pipe_input.source = source;
1763 pipe_input.child_process = child_process;
1764 pipe_input.user_data = user_data;
1765 pipe_input.input_cb = input_cb;
1768 g_static_mutex_init(&pipe_input.callback_running);
1769 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1770 do this but that doesn't cover all win32 platforms. GTK can do
1771 this but doesn't seem to work over processes. Attempt to do
1772 something similar here, start a timer and check for data on every
1774 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1775 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1785 #ifdef USE_TSHARK_SELECT
1789 struct sigaction action, oldaction;
1793 * XXX - dropping privileges is still required, until code cleanup is done
1795 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1796 * when it's done, we don't need special privileges to run tshark at all,
1797 * therefore we don't need to drop these privileges
1798 * The only thing we might want to keep is a warning if tshark is run as root,
1799 * as it's no longer necessary and potentially dangerous.
1801 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1802 * We've opened the capture device, so we shouldn't need any special
1803 * privileges any more; relinquish those privileges.
1805 * XXX - if we have saved set-user-ID support, we should give up those
1806 * privileges immediately, and then reclaim them long enough to get
1807 * a list of network interfaces and to open one, and then give them
1808 * up again, so that stuff we do while processing the argument list,
1809 * reading the user's preferences, loading and starting plugins
1810 * (especially *user* plugins), etc. is done with the user's privileges,
1811 * not special privileges.
1813 relinquish_special_privs_perm();
1814 print_current_user();
1816 /* Cleanup all data structures used for dissection. */
1817 cleanup_dissection();
1818 /* Initialize all data structures used for dissection. */
1822 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1823 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1825 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1827 action.sa_handler = capture_cleanup;
1828 action.sa_flags = 0;
1829 sigemptyset(&action.sa_mask);
1830 sigaction(SIGTERM, &action, NULL);
1831 sigaction(SIGINT, &action, NULL);
1832 sigaction(SIGHUP, NULL, &oldaction);
1833 if (oldaction.sa_handler == SIG_DFL)
1834 sigaction(SIGHUP, &action, NULL);
1837 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1838 quiet mode, report the number of packets we've captured. */
1839 action.sa_handler = report_counts_siginfo;
1840 action.sa_flags = 0;
1841 sigemptyset(&action.sa_mask);
1842 sigaction(SIGINFO, &action, NULL);
1843 #endif /* SIGINFO */
1846 global_capture_opts.state = CAPTURE_PREPARING;
1848 /* Let the user know what interface was chosen. */
1849 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1850 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1852 ret = sync_pipe_start(&global_capture_opts);
1857 /* the actual capture loop
1859 * XXX - glib doesn't seem to provide any event based loop handling.
1861 * XXX - for whatever reason,
1862 * calling g_main_loop_new() ends up in 100% cpu load.
1864 * But that doesn't matter: in UNIX we can use select() to find an input
1865 * source with something to do.
1867 * But that doesn't matter because we're in a CLI (that doesn't need to
1868 * update a GUI or something at the same time) so it's OK if we block
1869 * trying to read from the pipe.
1871 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1872 * wrong (but I leave it there in case I am...).
1875 #ifdef USE_TSHARK_SELECT
1877 FD_SET(pipe_input.source, &readfds);
1880 loop_running = TRUE;
1882 while (loop_running)
1884 #ifdef USE_TSHARK_SELECT
1885 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1891 } else if (ret == 1) {
1893 /* Call the real handler */
1894 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1895 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1898 #ifdef USE_TSHARK_SELECT
1907 /* XXX - move the call to main_window_update() out of capture_sync.c */
1908 /* dummy for capture_sync.c to make linker happy */
1909 void main_window_update(void)
1913 /* capture child detected an error */
1915 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1917 cmdarg_err("%s", error_msg);
1918 cmdarg_err_cont("%s", secondary_error_msg);
1922 /* capture child detected an capture filter related error */
1924 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1926 dfilter_t *rfcode = NULL;
1929 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1931 "Invalid capture filter: \"%s\"!\n"
1933 "That string looks like a valid display filter; however, it isn't a valid\n"
1934 "capture filter (%s).\n"
1936 "Note that display filters and capture filters don't have the same syntax,\n"
1937 "so you can't use most display filter expressions as capture filters.\n"
1939 "See the User's Guide for a description of the capture filter syntax.",
1940 capture_opts->cfilter, error_message);
1941 dfilter_free(rfcode);
1944 "Invalid capture filter: \"%s\"!\n"
1946 "That string isn't a valid capture filter (%s).\n"
1947 "See the User's Guide for a description of the capture filter syntax.",
1948 capture_opts->cfilter, error_message);
1953 /* capture child tells us we have a new (or the first) capture file */
1955 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1957 gboolean is_tempfile;
1961 if(capture_opts->state == CAPTURE_PREPARING) {
1962 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1964 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1966 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1968 /* free the old filename */
1969 if (capture_opts->save_file != NULL) {
1971 /* we start a new capture file, close the old one (if we had one before) */
1972 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1973 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1974 wtap_close(((capture_file *) capture_opts->cf)->wth);
1976 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1979 g_free(capture_opts->save_file);
1980 is_tempfile = FALSE;
1982 /* we didn't had a save_file before, must be a tempfile */
1986 /* save the new filename */
1987 capture_opts->save_file = g_strdup(new_file);
1989 /* if we are in real-time mode, open the new file now */
1991 /* Attempt to open the capture file and set up to read from it. */
1992 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1996 /* Don't unlink (delete) the save file - leave it around,
1997 for debugging purposes. */
1998 g_free(capture_opts->save_file);
1999 capture_opts->save_file = NULL;
2004 capture_opts->state = CAPTURE_RUNNING;
2010 /* capture child tells us we have new packets to read */
2012 capture_input_new_packets(capture_options *capture_opts, int to_read)
2018 capture_file *cf = capture_opts->cf;
2019 gboolean filtering_tap_listeners;
2024 * Prevent a SIGINFO handler from writing to stdout while we're
2025 * doing so; instead, have it just set a flag telling us to print
2026 * that information when we're done.
2029 #endif /* SIGINFO */
2031 /* Do we have any tap listeners with filters? */
2032 filtering_tap_listeners = have_filtering_tap_listeners();
2034 /* Get the union of the flags for all tap listeners. */
2035 tap_flags = union_of_tap_listener_flags();
2038 while (to_read-- && cf->wth) {
2039 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2041 /* read from file failed, tell the capture child to stop */
2042 sync_pipe_stop(capture_opts);
2043 wtap_close(cf->wth);
2046 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2047 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2048 filtering_tap_listeners, tap_flags);
2051 /* packet sucessfully read and gone through the "Read Filter" */
2057 * Dumpcap's doing all the work; we're not doing any dissection.
2058 * Count all the packets it wrote.
2060 packet_count += to_read;
2063 if (print_packet_counts) {
2064 /* We're printing packet counts. */
2065 if (packet_count != 0) {
2066 fprintf(stderr, "\r%u ", packet_count);
2067 /* stderr could be line buffered */
2074 * Allow SIGINFO handlers to write.
2079 * If a SIGINFO handler asked us to write out capture counts, do so.
2083 #endif /* SIGINFO */
2089 if (!print_packet_counts) {
2090 /* Report the count only if we aren't printing a packet count
2091 as packets arrive. */
2092 fprintf(stderr, "%u packet%s captured\n", packet_count,
2093 plurality(packet_count, "", "s"));
2096 infoprint = FALSE; /* we just reported it */
2097 #endif /* SIGINFO */
2102 report_counts_siginfo(int signum _U_)
2104 int sav_errno = errno;
2105 /* If we've been told to delay printing, just set a flag asking
2106 that we print counts (if we're supposed to), otherwise print
2107 the count of packets captured (if we're supposed to). */
2114 #endif /* SIGINFO */
2117 /* capture child detected any packet drops? */
2119 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2121 if (print_packet_counts) {
2122 /* We're printing packet counts to stderr.
2123 Send a newline so that we move to the line after the packet count. */
2124 fprintf(stderr, "\n");
2128 /* We're printing packet counts to stderr.
2129 Send a newline so that we move to the line after the packet count. */
2130 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2135 /* capture child closed its side of the pipe, do the required cleanup */
2137 capture_input_closed(capture_options *capture_opts)
2141 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2142 wtap_close(((capture_file *) capture_opts->cf)->wth);
2144 #ifdef USE_BROKEN_G_MAIN_LOOP
2145 /*g_main_loop_quit(loop);*/
2148 loop_running = FALSE;
2157 capture_cleanup(DWORD ctrltype _U_)
2159 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2160 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2161 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2162 like SIGTERM at least when the machine's shutting down.
2164 For now, we handle them all as indications that we should clean up
2165 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2168 However, as handlers run in a new thread, we can't just longjmp
2169 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2170 no other handler - such as one that would terminate the process -
2173 XXX - for some reason, typing ^C to TShark, if you run this in
2174 a Cygwin console window in at least some versions of Cygwin,
2175 causes TShark to terminate immediately; this routine gets
2176 called, but the main loop doesn't get a chance to run and
2177 exit cleanly, at least if this is compiled with Microsoft Visual
2178 C++ (i.e., it's a property of the Cygwin console window or Bash;
2179 it happens if TShark is not built with Cygwin - for all I know,
2180 building it with Cygwin may make the problem go away). */
2182 /* tell the capture child to stop */
2183 sync_pipe_stop(&global_capture_opts);
2185 /* don't stop our own loop already here, otherwise status messages and
2186 * cleanup wouldn't be done properly. The child will indicate the stop of
2187 * everything by calling capture_input_closed() later */
2193 capture_cleanup(int signum _U_)
2195 /* tell the capture child to stop */
2196 sync_pipe_stop(&global_capture_opts);
2199 #endif /* HAVE_LIBPCAP */
2201 #if GLIB_CHECK_VERSION(2,10,0)
2203 process_packet_first_pass(capture_file *cf,
2204 gint64 offset, const struct wtap_pkthdr *whdr,
2205 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2207 frame_data *fdata = g_slice_new(frame_data);
2211 /* Count this packet. */
2214 /* If we're not running a display filter and we're not printing any
2215 packet information, we don't need to do a dissection. This means
2216 that all packets can be marked as 'passed'. */
2219 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2221 /* If we're going to print packet information, or we're going to
2222 run a read filter, or we're going to process taps, set up to
2223 do a dissection and do so. */
2224 if (do_dissection) {
2226 /* Grab any resolved addresses */
2227 host_name_lookup_process(NULL);
2229 /* The protocol tree will be "visible", i.e., printed, only if we're
2230 printing packet details, which is true if we're printing stuff
2231 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2233 epan_dissect_init(&edt, FALSE, FALSE);
2235 /* If we're running a read filter, prime the epan_dissect_t with that
2238 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2240 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2241 &first_ts, &prev_dis_ts, &prev_cap_ts);
2243 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2245 /* Run the read filter if we have one. */
2247 passed = dfilter_apply_edt(cf->rfcode, &edt);
2251 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2252 cap_file_add_fdata(cf, fdata);
2255 g_slice_free(frame_data, fdata);
2258 epan_dissect_cleanup(&edt);
2264 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2265 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2266 gboolean filtering_tap_listeners, guint tap_flags)
2268 gboolean create_proto_tree;
2273 /* If we're not running a display filter and we're not printing any
2274 packet information, we don't need to do a dissection. This means
2275 that all packets can be marked as 'passed'. */
2278 /* If we're going to print packet information, or we're going to
2279 run a read filter, or we're going to process taps, set up to
2280 do a dissection and do so. */
2281 if (do_dissection) {
2283 /* Grab any resolved addresses */
2284 host_name_lookup_process(NULL);
2286 if (cf->rfcode || verbose || filtering_tap_listeners ||
2287 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2288 create_proto_tree = TRUE;
2290 create_proto_tree = FALSE;
2292 /* The protocol tree will be "visible", i.e., printed, only if we're
2293 printing packet details, which is true if we're printing stuff
2294 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2296 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2298 /* If we're running a read filter, prime the epan_dissect_t with that
2301 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2303 col_custom_prime_edt(&edt, &cf->cinfo);
2305 tap_queue_init(&edt);
2307 /* We only need the columns if either
2309 1) some tap needs the columns
2313 2) we're printing packet info but we're *not* verbose; in verbose
2314 mode, we print the protocol tree, not the protocol summary. */
2315 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2320 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2322 tap_push_tapped_queue(&edt);
2324 /* Run the read filter if we have one. */
2326 passed = dfilter_apply_edt(cf->rfcode, &edt);
2330 /* Process this packet. */
2331 if (print_packet_info) {
2332 /* We're printing packet information; print the information for
2335 print_packet(cf, &edt);
2337 print_packet(cf, NULL);
2339 /* The ANSI C standard does not appear to *require* that a line-buffered
2340 stream be flushed to the host environment whenever a newline is
2341 written, it just says that, on such a stream, characters "are
2342 intended to be transmitted to or from the host environment as a
2343 block when a new-line character is encountered".
2345 The Visual C++ 6.0 C implementation doesn't do what is intended;
2346 even if you set a stream to be line-buffered, it still doesn't
2347 flush the buffer at the end of every line.
2349 So, if the "-l" flag was specified, we flush the standard output
2350 at the end of a packet. This will do the right thing if we're
2351 printing packet summary lines, and, as we print the entire protocol
2352 tree for a single packet without waiting for anything to happen,
2353 it should be as good as line-buffered mode if we're printing
2354 protocol trees. (The whole reason for the "-l" flag in either
2355 tcpdump or TShark is to allow the output of a live capture to
2356 be piped to a program or script and to have that script see the
2357 information for the packet as soon as it's printed, rather than
2358 having to wait until a standard I/O buffer fills up. */
2362 if (ferror(stdout)) {
2363 show_print_file_io_error(errno);
2369 if (do_dissection) {
2370 epan_dissect_cleanup(&edt);
2377 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2378 int max_packet_count, gint64 max_byte_count)
2381 int snapshot_length;
2386 char *save_file_string = NULL;
2387 gboolean filtering_tap_listeners;
2390 linktype = wtap_file_encap(cf->wth);
2391 if (save_file != NULL) {
2392 /* Get a string that describes what we're writing to */
2393 save_file_string = output_file_description(save_file);
2395 /* Set up to write to the capture file. */
2396 snapshot_length = wtap_snapshot_length(cf->wth);
2397 if (snapshot_length == 0) {
2398 /* Snapshot length of input file not known. */
2399 snapshot_length = WTAP_MAX_PACKET_SIZE;
2401 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2402 FALSE /* compressed */, &err);
2405 /* We couldn't set up to write to the capture file. */
2408 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2409 cmdarg_err("Capture files can't be written in that format.");
2412 case WTAP_ERR_UNSUPPORTED_ENCAP:
2413 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2414 cmdarg_err("The capture file being read can't be written in "
2418 case WTAP_ERR_CANT_OPEN:
2419 cmdarg_err("The %s couldn't be created for some "
2420 "unknown reason.", save_file_string);
2423 case WTAP_ERR_SHORT_WRITE:
2424 cmdarg_err("A full header couldn't be written to the %s.",
2429 cmdarg_err("The %s could not be created: %s.", save_file_string,
2430 wtap_strerror(err));
2436 if (print_packet_info) {
2437 if (!write_preamble(cf)) {
2439 show_print_file_io_error(err);
2446 /* Do we have any tap listeners with filters? */
2447 filtering_tap_listeners = have_filtering_tap_listeners();
2449 /* Get the union of the flags for all tap listeners. */
2450 tap_flags = union_of_tap_listener_flags();
2452 if (perform_two_pass_analysis) {
2453 #if GLIB_CHECK_VERSION(2,10,0)
2455 int old_max_packet_count = max_packet_count;
2457 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2458 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2459 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2460 /* Stop reading if we have the maximum number of packets;
2461 * When the -c option has not been used, max_packet_count
2462 * starts at 0, which practically means, never stop reading.
2463 * (unless we roll over max_packet_count ?)
2465 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2466 err = 0; /* This is not an error */
2472 /* Close the sequential I/O side, to free up memory it requires. */
2473 wtap_sequential_close(cf->wth);
2475 /* Allow the protocol dissectors to free up memory that they
2476 * don't need after the sequential run-through of the packets. */
2477 postseq_cleanup_all_protocols();
2479 max_packet_count = old_max_packet_count;
2481 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2482 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2483 cf->pd, fdata->cap_len, &err, &err_info)) {
2484 if (process_packet_second_pass(cf, fdata,
2485 &cf->pseudo_header, cf->pd,
2486 filtering_tap_listeners, tap_flags)) {
2487 /* Either there's no read filtering or this packet passed the
2488 filter, so, if we're writing to a capture file, write
2491 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2492 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2494 /* Error writing to a capture file */
2495 show_capture_file_io_error(save_file, err, FALSE);
2496 wtap_dump_close(pdh, &err);
2500 /* Stop reading if we have the maximum number of packets;
2501 * When the -c option has not been used, max_packet_count
2502 * starts at 0, which practically means, never stop reading.
2503 * (unless we roll over max_packet_count ?)
2505 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2506 err = 0; /* This is not an error */
2515 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2516 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2517 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2518 filtering_tap_listeners, tap_flags)) {
2519 /* Either there's no read filtering or this packet passed the
2520 filter, so, if we're writing to a capture file, write
2523 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2524 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2526 /* Error writing to a capture file */
2527 show_capture_file_io_error(save_file, err, FALSE);
2528 wtap_dump_close(pdh, &err);
2532 /* Stop reading if we have the maximum number of packets;
2533 * When the -c option has not been used, max_packet_count
2534 * starts at 0, which practically means, never stop reading.
2535 * (unless we roll over max_packet_count ?)
2537 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2538 err = 0; /* This is not an error */
2546 /* Print a message noting that the read failed somewhere along the line. */
2549 case WTAP_ERR_UNSUPPORTED_ENCAP:
2550 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2551 cf->filename, err_info);
2555 case WTAP_ERR_CANT_READ:
2556 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2560 case WTAP_ERR_SHORT_READ:
2561 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2565 case WTAP_ERR_BAD_RECORD:
2566 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2567 cf->filename, err_info);
2572 cmdarg_err("An error occurred while reading \"%s\": %s.",
2573 cf->filename, wtap_strerror(err));
2576 if (save_file != NULL) {
2577 /* Now close the capture file. */
2578 if (!wtap_dump_close(pdh, &err))
2579 show_capture_file_io_error(save_file, err, TRUE);
2582 if (save_file != NULL) {
2583 /* Now close the capture file. */
2584 if (!wtap_dump_close(pdh, &err))
2585 show_capture_file_io_error(save_file, err, TRUE);
2587 if (print_packet_info) {
2588 if (!write_finale()) {
2590 show_print_file_io_error(err);
2597 wtap_close(cf->wth);
2600 g_free(save_file_string);
2606 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2607 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2608 gboolean filtering_tap_listeners, guint tap_flags)
2611 gboolean create_proto_tree;
2616 /* Count this packet. */
2619 /* If we're not running a display filter and we're not printing any
2620 packet information, we don't need to do a dissection. This means
2621 that all packets can be marked as 'passed'. */
2624 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2626 /* If we're going to print packet information, or we're going to
2627 run a read filter, or we're going to process taps, set up to
2628 do a dissection and do so. */
2629 if (do_dissection) {
2630 if (print_packet_info && g_resolv_flags)
2631 /* Grab any resolved addresses */
2632 host_name_lookup_process(NULL);
2634 if (cf->rfcode || verbose || filtering_tap_listeners ||
2635 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2636 create_proto_tree = TRUE;
2638 create_proto_tree = FALSE;
2640 /* The protocol tree will be "visible", i.e., printed, only if we're
2641 printing packet details, which is true if we're printing stuff
2642 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2644 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2646 /* If we're running a read filter, prime the epan_dissect_t with that
2649 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2651 col_custom_prime_edt(&edt, &cf->cinfo);
2653 tap_queue_init(&edt);
2655 /* We only need the columns if either
2657 1) some tap needs the columns
2661 2) we're printing packet info but we're *not* verbose; in verbose
2662 mode, we print the protocol tree, not the protocol summary. */
2663 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2668 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2669 &first_ts, &prev_dis_ts, &prev_cap_ts);
2671 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2673 tap_push_tapped_queue(&edt);
2675 /* Run the read filter if we have one. */
2677 passed = dfilter_apply_edt(cf->rfcode, &edt);
2681 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2683 /* Process this packet. */
2684 if (print_packet_info) {
2685 /* We're printing packet information; print the information for
2688 print_packet(cf, &edt);
2690 print_packet(cf, NULL);
2692 /* The ANSI C standard does not appear to *require* that a line-buffered
2693 stream be flushed to the host environment whenever a newline is
2694 written, it just says that, on such a stream, characters "are
2695 intended to be transmitted to or from the host environment as a
2696 block when a new-line character is encountered".
2698 The Visual C++ 6.0 C implementation doesn't do what is intended;
2699 even if you set a stream to be line-buffered, it still doesn't
2700 flush the buffer at the end of every line.
2702 So, if the "-l" flag was specified, we flush the standard output
2703 at the end of a packet. This will do the right thing if we're
2704 printing packet summary lines, and, as we print the entire protocol
2705 tree for a single packet without waiting for anything to happen,
2706 it should be as good as line-buffered mode if we're printing
2707 protocol trees. (The whole reason for the "-l" flag in either
2708 tcpdump or TShark is to allow the output of a live capture to
2709 be piped to a program or script and to have that script see the
2710 information for the packet as soon as it's printed, rather than
2711 having to wait until a standard I/O buffer fills up. */
2715 if (ferror(stdout)) {
2716 show_print_file_io_error(errno);
2722 if (do_dissection) {
2723 epan_dissect_cleanup(&edt);
2724 frame_data_cleanup(&fdata);
2730 write_preamble(capture_file *cf)
2732 switch (output_action) {
2735 return print_preamble(print_stream, cf ? cf->filename : NULL);
2739 write_pdml_preamble(stdout);
2741 write_psml_preamble(stdout);
2742 return !ferror(stdout);
2745 write_fields_preamble(output_fields, stdout);
2746 return !ferror(stdout);
2749 g_assert_not_reached();
2755 get_line_buf(size_t len)
2757 static char *line_bufp = NULL;
2758 static size_t line_buf_len = 256;
2759 size_t new_line_buf_len;
2761 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2762 new_line_buf_len *= 2)
2764 if (line_bufp == NULL) {
2765 line_buf_len = new_line_buf_len;
2766 line_bufp = g_malloc(line_buf_len + 1);
2768 if (new_line_buf_len > line_buf_len) {
2769 line_buf_len = new_line_buf_len;
2770 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2777 print_columns(capture_file *cf)
2784 line_bufp = get_line_buf(256);
2787 for (i = 0; i < cf->cinfo.num_cols; i++) {
2788 switch (cf->cinfo.col_fmt[i]) {
2792 * Don't print this if we're doing a live capture from a network
2793 * interface - if we're doing a live capture, you won't be
2794 * able to look at the capture in the future (it's not being
2795 * saved anywhere), so the frame numbers are unlikely to be
2798 * (XXX - it might be nice to be able to save and print at
2799 * the same time, sort of like an "Update list of packets
2800 * in real time" capture in Wireshark.)
2802 if (global_capture_opts.iface != NULL)
2805 column_len = strlen(cf->cinfo.col_data[i]);
2808 line_bufp = get_line_buf(buf_offset + column_len);
2809 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2815 case COL_ABS_DATE_TIME: /* XXX - wider */
2816 column_len = strlen(cf->cinfo.col_data[i]);
2817 if (column_len < 10)
2819 line_bufp = get_line_buf(buf_offset + column_len);
2820 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2826 case COL_DEF_DL_SRC:
2827 case COL_RES_DL_SRC:
2828 case COL_UNRES_DL_SRC:
2829 case COL_DEF_NET_SRC:
2830 case COL_RES_NET_SRC:
2831 case COL_UNRES_NET_SRC:
2832 column_len = strlen(cf->cinfo.col_data[i]);
2833 if (column_len < 12)
2835 line_bufp = get_line_buf(buf_offset + column_len);
2836 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2842 case COL_DEF_DL_DST:
2843 case COL_RES_DL_DST:
2844 case COL_UNRES_DL_DST:
2845 case COL_DEF_NET_DST:
2846 case COL_RES_NET_DST:
2847 case COL_UNRES_NET_DST:
2848 column_len = strlen(cf->cinfo.col_data[i]);
2849 if (column_len < 12)
2851 line_bufp = get_line_buf(buf_offset + column_len);
2852 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2856 column_len = strlen(cf->cinfo.col_data[i]);
2857 line_bufp = get_line_buf(buf_offset + column_len);
2858 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2861 buf_offset += column_len;
2862 if (i != cf->cinfo.num_cols - 1) {
2864 * This isn't the last column, so we need to print a
2865 * separator between this column and the next.
2867 * If we printed a network source and are printing a
2868 * network destination of the same type next, separate
2869 * them with "->"; if we printed a network destination
2870 * and are printing a network source of the same type
2871 * next, separate them with "<-"; otherwise separate them
2874 * We add enough space to the buffer for " <- " or " -> ",
2875 * even if we're only adding " ".
2877 line_bufp = get_line_buf(buf_offset + 4);
2878 switch (cf->cinfo.col_fmt[i]) {
2883 switch (cf->cinfo.col_fmt[i + 1]) {
2888 strcat(line_bufp + buf_offset, " -> ");
2893 strcat(line_bufp + buf_offset, " ");
2899 case COL_DEF_DL_SRC:
2900 case COL_RES_DL_SRC:
2901 case COL_UNRES_DL_SRC:
2902 switch (cf->cinfo.col_fmt[i + 1]) {
2904 case COL_DEF_DL_DST:
2905 case COL_RES_DL_DST:
2906 case COL_UNRES_DL_DST:
2907 strcat(line_bufp + buf_offset, " -> ");
2912 strcat(line_bufp + buf_offset, " ");
2918 case COL_DEF_NET_SRC:
2919 case COL_RES_NET_SRC:
2920 case COL_UNRES_NET_SRC:
2921 switch (cf->cinfo.col_fmt[i + 1]) {
2923 case COL_DEF_NET_DST:
2924 case COL_RES_NET_DST:
2925 case COL_UNRES_NET_DST:
2926 strcat(line_bufp + buf_offset, " -> ");
2931 strcat(line_bufp + buf_offset, " ");
2940 switch (cf->cinfo.col_fmt[i + 1]) {
2945 strcat(line_bufp + buf_offset, " <- ");
2950 strcat(line_bufp + buf_offset, " ");
2956 case COL_DEF_DL_DST:
2957 case COL_RES_DL_DST:
2958 case COL_UNRES_DL_DST:
2959 switch (cf->cinfo.col_fmt[i + 1]) {
2961 case COL_DEF_DL_SRC:
2962 case COL_RES_DL_SRC:
2963 case COL_UNRES_DL_SRC:
2964 strcat(line_bufp + buf_offset, " <- ");
2969 strcat(line_bufp + buf_offset, " ");
2975 case COL_DEF_NET_DST:
2976 case COL_RES_NET_DST:
2977 case COL_UNRES_NET_DST:
2978 switch (cf->cinfo.col_fmt[i + 1]) {
2980 case COL_DEF_NET_SRC:
2981 case COL_RES_NET_SRC:
2982 case COL_UNRES_NET_SRC:
2983 strcat(line_bufp + buf_offset, " <- ");
2988 strcat(line_bufp + buf_offset, " ");
2995 strcat(line_bufp + buf_offset, " ");
3001 return print_line(print_stream, 0, line_bufp);
3005 print_packet(capture_file *cf, epan_dissect_t *edt)
3007 print_args_t print_args;
3010 /* Print the information in the protocol tree. */
3011 switch (output_action) {
3014 print_args.to_file = TRUE;
3015 print_args.format = print_format;
3016 print_args.print_summary = !verbose;
3017 print_args.print_hex = verbose && print_hex;
3018 print_args.print_formfeed = FALSE;
3019 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3021 /* init the packet range */
3022 packet_range_init(&print_args.range);
3024 if (!proto_tree_print(&print_args, edt, print_stream))
3027 /* "print_hex_data()" will put out a leading blank line, as well
3028 as a trailing one; print one here, to separate the packets,
3029 only if "print_hex_data()" won't be called. */
3030 if (!print_line(print_stream, 0, ""))
3036 proto_tree_write_pdml(edt, stdout);
3038 return !ferror(stdout);
3040 proto_tree_write_fields(output_fields, edt, stdout);
3042 return !ferror(stdout);
3045 /* Just fill in the columns. */
3046 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3048 /* Now print them. */
3049 switch (output_action) {
3052 if (!print_columns(cf))
3057 proto_tree_write_psml(edt, stdout);
3058 return !ferror(stdout);
3059 case WRITE_FIELDS: /*No non-verbose "fields" format */
3060 g_assert_not_reached();
3065 if (!print_hex_data(print_stream, edt))
3067 if (!print_line(print_stream, 0, ""))
3076 switch (output_action) {
3079 return print_finale(print_stream);
3083 write_pdml_finale(stdout);
3085 write_psml_finale(stdout);
3086 return !ferror(stdout);
3089 write_fields_finale(output_fields, stdout);
3090 return !ferror(stdout);
3093 g_assert_not_reached();
3099 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3103 char err_msg[2048+1];
3105 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3109 /* The open succeeded. Fill in the information for this file. */
3111 /* Cleanup all data structures used for dissection. */
3112 cleanup_dissection();
3113 /* Initialize all data structures used for dissection. */
3117 cf->f_datalen = 0; /* not used, but set it anyway */
3119 /* Set the file name because we need it to set the follow stream filter.
3120 XXX - is that still true? We need it for other reasons, though,
3122 cf->filename = g_strdup(fname);
3124 /* Indicate whether it's a permanent or temporary file. */
3125 cf->is_tempfile = is_tempfile;
3127 /* If it's a temporary capture buffer file, mark it as not saved. */
3128 cf->user_saved = !is_tempfile;
3130 cf->cd_t = wtap_file_type(cf->wth);
3132 cf->drops_known = FALSE;
3134 cf->snap = wtap_snapshot_length(cf->wth);
3135 if (cf->snap == 0) {
3136 /* Snapshot length not known. */
3137 cf->has_snap = FALSE;
3138 cf->snap = WTAP_MAX_PACKET_SIZE;
3140 cf->has_snap = TRUE;
3141 nstime_set_zero(&cf->elapsed_time);
3142 nstime_set_unset(&first_ts);
3143 nstime_set_unset(&prev_dis_ts);
3144 nstime_set_unset(&prev_cap_ts);
3146 cf->state = FILE_READ_IN_PROGRESS;
3151 g_snprintf(err_msg, sizeof err_msg,
3152 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3153 cmdarg_err("%s", err_msg);
3158 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3160 char *save_file_string;
3162 save_file_string = output_file_description(fname);
3167 cmdarg_err("Not all the packets could be written to the %s because there is "
3168 "no space left on the file system.",
3174 cmdarg_err("Not all the packets could be written to the %s because you are "
3175 "too close to, or over your disk quota.",
3180 case WTAP_ERR_CANT_CLOSE:
3181 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3185 case WTAP_ERR_SHORT_WRITE:
3186 cmdarg_err("Not all the packets could be written to the %s.",
3192 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3193 wtap_strerror(err));
3195 cmdarg_err("An error occurred while writing to the %s: %s.",
3196 save_file_string, wtap_strerror(err));
3200 g_free(save_file_string);
3204 show_print_file_io_error(int err)
3209 cmdarg_err("Not all the packets could be printed because there is "
3210 "no space left on the file system.");
3215 cmdarg_err("Not all the packets could be printed because you are "
3216 "too close to, or over your disk quota.");
3221 cmdarg_err("An error occurred while printing packets: %s.",
3228 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3232 static char errmsg_errno[1024+1];
3235 /* Wiretap error. */
3238 case WTAP_ERR_NOT_REGULAR_FILE:
3239 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3242 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3243 /* Seen only when opening a capture file for reading. */
3244 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3247 case WTAP_ERR_UNSUPPORTED:
3248 /* Seen only when opening a capture file for reading. */
3249 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3250 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3253 errmsg = errmsg_errno;
3256 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3257 /* Seen only when opening a capture file for writing. */
3258 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3259 "The file \"%%s\" is a pipe, and %s capture files can't be "
3260 "written to a pipe.", wtap_file_type_string(file_type));
3261 errmsg = errmsg_errno;
3264 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3265 /* Seen only when opening a capture file for writing. */
3266 errmsg = "TShark doesn't support writing capture files in that format.";
3269 case WTAP_ERR_UNSUPPORTED_ENCAP:
3271 errmsg = "TShark can't save this capture in that format.";
3273 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3274 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3277 errmsg = errmsg_errno;
3281 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3283 errmsg = "TShark can't save this capture in that format.";
3285 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3288 case WTAP_ERR_BAD_RECORD:
3289 /* Seen only when opening a capture file for reading. */
3290 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3291 "The file \"%%s\" appears to be damaged or corrupt.\n"
3294 errmsg = errmsg_errno;
3297 case WTAP_ERR_CANT_OPEN:
3299 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3301 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3304 case WTAP_ERR_SHORT_READ:
3305 errmsg = "The file \"%s\" appears to have been cut short"
3306 " in the middle of a packet or other data.";
3309 case WTAP_ERR_SHORT_WRITE:
3310 errmsg = "A full header couldn't be written to the file \"%s\".";
3314 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3315 "The file \"%%s\" could not be %s: %s.",
3316 for_writing ? "created" : "opened",
3317 wtap_strerror(err));
3318 errmsg = errmsg_errno;
3322 errmsg = file_open_error_message(err, for_writing);
3327 * Open/create errors are reported with an console message in TShark.
3330 open_failure_message(const char *filename, int err, gboolean for_writing)
3332 fprintf(stderr, "tshark: ");
3333 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3334 fprintf(stderr, "\n");
3339 * General errors are reported with an console message in TShark.
3342 failure_message(const char *msg_format, va_list ap)
3344 fprintf(stderr, "tshark: ");
3345 vfprintf(stderr, msg_format, ap);
3346 fprintf(stderr, "\n");
3350 * Read errors are reported with an console message in TShark.
3353 read_failure_message(const char *filename, int err)
3355 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3356 filename, strerror(err));
3360 * Write errors are reported with an console message in TShark.
3363 write_failure_message(const char *filename, int err)
3365 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3366 filename, strerror(err));
3370 * Report an error in command-line arguments.
3373 cmdarg_err(const char *fmt, ...)
3378 failure_message(fmt, ap);
3383 * Report additional information for an error in command-line arguments.
3386 cmdarg_err_cont(const char *fmt, ...)
3391 vfprintf(stderr, fmt, ap);
3392 fprintf(stderr, "\n");