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"
93 #include "capture-pcap-util.h"
95 #include "capture-wpcap.h"
96 #include "capture_errs.h"
98 #include "capture_sync.h"
99 #endif /* HAVE_LIBPCAP */
101 #include <epan/funnel.h>
105 * This is the template for the decode as option; it is shared between the
106 * various functions that output the usage for this parameter.
108 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
110 static guint32 cum_bytes;
111 static nstime_t first_ts;
112 static nstime_t prev_dis_ts;
113 static nstime_t prev_cap_ts;
115 static gboolean print_packet_info; /* TRUE if we're to print packet information */
117 static gboolean perform_two_pass_analysis;
120 * The way the packet decode is to be written.
123 WRITE_TEXT, /* summary or detail text */
124 WRITE_XML, /* PDML or PSML */
125 WRITE_FIELDS /* User defined list of fields */
126 /* Add CSV and the like here */
129 static output_action_e output_action;
130 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
131 static gboolean verbose;
132 static gboolean print_hex;
133 static gboolean line_buffered;
135 static print_format_e print_format = PR_FMT_TEXT;
136 static print_stream_t *print_stream;
138 static output_fields_t* output_fields = NULL;
141 * Standard secondary message for unexpected errors.
143 static const char please_report[] =
144 "Please report this to the Wireshark developers";
148 * TRUE if we're to print packet counts to keep track of captured packets.
150 static gboolean print_packet_counts;
153 static capture_options global_capture_opts;
156 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
157 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
160 static int capture(void);
161 static void report_counts(void);
163 static BOOL WINAPI capture_cleanup(DWORD);
165 static void capture_cleanup(int);
167 static void report_counts_siginfo(int);
170 #endif /* HAVE_LIBPCAP */
172 static int load_cap_file(capture_file *, char *, int, int, gint64);
173 static gboolean process_packet(capture_file *cf, gint64 offset,
174 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
175 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
176 static void show_capture_file_io_error(const char *, int, gboolean);
177 static void show_print_file_io_error(int err);
178 static gboolean write_preamble(capture_file *cf);
179 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
180 static gboolean write_finale(void);
181 static const char *cf_open_error_message(int err, gchar *err_info,
182 gboolean for_writing, int file_type);
184 static void open_failure_message(const char *filename, int err,
185 gboolean for_writing);
186 static void failure_message(const char *msg_format, va_list ap);
187 static void read_failure_message(const char *filename, int err);
188 static void write_failure_message(const char *filename, int err);
193 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
195 g_assert_not_reached();
198 static void list_capture_types(void) {
201 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
202 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
203 if (wtap_dump_can_open(i))
204 fprintf(stderr, " %s - %s\n",
205 wtap_file_type_short_string(i), wtap_file_type_string(i));
210 print_usage(gboolean print_ver)
217 "TShark " VERSION "%s\n"
218 "Dump and analyze network traffic.\n"
219 "See http://www.wireshark.org for more information.\n"
222 wireshark_svnversion, get_copyright_info());
226 fprintf(output, "\n");
227 fprintf(output, "Usage: tshark [options] ...\n");
228 fprintf(output, "\n");
231 fprintf(output, "Capture interface:\n");
232 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
233 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
234 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
235 fprintf(output, " -p don't capture in promiscuous mode\n");
237 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
239 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
240 fprintf(output, " -D print list of interfaces and exit\n");
241 fprintf(output, " -L print list of link-layer types of iface and exit\n");
242 fprintf(output, "\n");
243 fprintf(output, "Capture stop conditions:\n");
244 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
245 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
246 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
247 fprintf(output, " files:NUM - stop after NUM files\n");
248 /*fprintf(output, "\n");*/
249 fprintf(output, "Capture output:\n");
250 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
251 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
252 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
253 #endif /* HAVE_LIBPCAP */
255 /*fprintf(output, "\n");*/
256 fprintf(output, "Input file:\n");
257 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
259 fprintf(output, "\n");
260 fprintf(output, "Processing:\n");
261 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
262 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
263 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
264 fprintf(output, " -d %s ...\n", decode_as_arg_template);
265 fprintf(output, " \"Decode As\", see the man page for details\n");
266 fprintf(output, " Example: tcp.port==8888,http\n");
268 /*fprintf(output, "\n");*/
269 fprintf(output, "Output:\n");
270 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
271 fprintf(output, " (or to the standard output for \"-\")\n");
272 fprintf(output, " -C <config profile> start with specified configuration profile\n");
273 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
274 fprintf(output, " an empty \"-F\" option will list the file types\n");
275 fprintf(output, " -V add output of packet tree (Packet Details)\n");
276 fprintf(output, " -S display packets even when writing to a file\n");
277 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
278 fprintf(output, " -T pdml|ps|psml|text|fields\n");
279 fprintf(output, " format of text output (def: text)\n");
280 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
281 fprintf(output, " this option can be repeated to print multiple fields\n");
282 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
283 fprintf(output, " header=y|n switch headers on and off\n");
284 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
285 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
286 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\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: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 = 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->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 'v': /* Show version and exit */
1181 GString *comp_info_str;
1182 GString *runtime_info_str;
1183 /* Assemble the compile-time version information string */
1184 comp_info_str = g_string_new("Compiled ");
1185 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1187 /* Assemble the run-time version information string */
1188 runtime_info_str = g_string_new("Running ");
1189 get_runtime_version_info(runtime_info_str, NULL);
1190 show_version(comp_info_str, runtime_info_str);
1191 g_string_free(comp_info_str, TRUE);
1192 g_string_free(runtime_info_str, TRUE);
1196 case 'V': /* Verbose */
1199 case 'x': /* Print packet data in hex (and ASCII) */
1205 /* We won't call the init function for the stat this soon
1206 as it would disallow MATE's fields (which are registered
1207 by the preferences set callback) from being used as
1208 part of a tap filter. Instead, we just add the argument
1209 to a list of stat arguments. */
1210 if (!process_stat_cmd_arg(optarg)) {
1211 cmdarg_err("invalid -z argument.");
1212 cmdarg_err_cont(" -z argument must be one of :");
1213 list_stat_cmd_args();
1218 case '?': /* Bad flag - print usage message */
1221 list_capture_types();
1231 /* If we specified output fields, but not the output field type... */
1232 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1233 cmdarg_err("Output fields were specified with \"-e\", "
1234 "but \"-Tfields\" was not specified.");
1236 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1237 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1238 "specified with \"-e\".");
1243 /* If no capture filter or read filter has been specified, and there are
1244 still command-line arguments, treat them as the tokens of a capture
1245 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1246 flag was specified. */
1247 if (optind < argc) {
1248 if (cf_name != NULL) {
1249 if (rfilter != NULL) {
1250 cmdarg_err("Read filters were specified both with \"-R\" "
1251 "and with additional command-line arguments");
1254 rfilter = get_args_as_string(argc, argv, optind);
1257 if (global_capture_opts.has_cfilter) {
1258 cmdarg_err("Capture filters were specified both with \"-f\""
1259 " and with additional command-line arguments");
1262 global_capture_opts.has_cfilter = TRUE;
1263 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1265 capture_option_specified = TRUE;
1271 if (!global_capture_opts.saving_to_file) {
1272 /* We're not saving the capture to a file; if "-q" wasn't specified,
1273 we should print packet information */
1275 print_packet_info = TRUE;
1277 /* We're saving to a file; if we're writing to the standard output.
1278 and we'll also be writing dissected packets to the standard
1279 output, reject the request. At best, we could redirect that
1280 to the standard error; we *can't* write both to the standard
1281 output and have either of them be useful. */
1282 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1283 cmdarg_err("You can't write both raw packet data and dissected packets"
1284 " to the standard output.");
1289 /* We're not saving the capture to a file; if "-q" wasn't specified,
1290 we should print packet information */
1292 print_packet_info = TRUE;
1295 #ifndef HAVE_LIBPCAP
1296 if (capture_option_specified)
1297 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1304 /* We don't support capture filters when reading from a capture file
1305 (the BPF compiler doesn't support all link-layer types that we
1306 support in capture files we read). */
1308 if (cf_name != NULL) {
1309 if (global_capture_opts.has_cfilter) {
1310 cmdarg_err("Only read filters, not capture filters, "
1311 "can be specified when reading a capture file.");
1318 if (output_action != WRITE_TEXT) {
1319 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1325 if (list_link_layer_types) {
1326 /* We're supposed to list the link-layer types for an interface;
1327 did the user also specify a capture file to be read? */
1329 /* Yes - that's bogus. */
1330 cmdarg_err("You can't specify -L and a capture file to be read.");
1333 /* No - did they specify a ring buffer option? */
1334 if (global_capture_opts.multi_files_on) {
1335 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1341 * "-r" was specified, so we're reading a capture file.
1342 * Capture options don't apply here.
1344 if (global_capture_opts.multi_files_on) {
1345 cmdarg_err("Multiple capture files requested, but "
1346 "a capture isn't being done.");
1349 if (global_capture_opts.has_file_duration) {
1350 cmdarg_err("Switching capture files after a time interval was specified, but "
1351 "a capture isn't being done.");
1354 if (global_capture_opts.has_ring_num_files) {
1355 cmdarg_err("A ring buffer of capture files was specified, but "
1356 "a capture isn't being done.");
1359 if (global_capture_opts.has_autostop_files) {
1360 cmdarg_err("A maximum number of capture files was specified, but "
1361 "a capture isn't being done.");
1365 /* Note: TShark now allows the restriction of a _read_ file by packet count
1366 * and byte count as well as a write file. Other autostop options remain valid
1367 * only for a write file.
1369 if (global_capture_opts.has_autostop_duration) {
1370 cmdarg_err("A maximum capture time was specified, but "
1371 "a capture isn't being done.");
1376 * "-r" wasn't specified, so we're doing a live capture.
1378 if (global_capture_opts.saving_to_file) {
1379 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1381 /* When capturing, we only support writing libpcap format. */
1382 if (out_file_type != WTAP_FILE_PCAP) {
1383 cmdarg_err("Live captures can only be saved in libpcap format.");
1386 if (global_capture_opts.multi_files_on) {
1387 /* Multiple-file mode doesn't work under certain conditions:
1388 a) it doesn't work if you're writing to the standard output;
1389 b) it doesn't work if you're writing to a pipe;
1391 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1392 cmdarg_err("Multiple capture files requested, but "
1393 "the capture is being written to the standard output.");
1396 if (global_capture_opts.output_to_pipe) {
1397 cmdarg_err("Multiple capture files requested, but "
1398 "the capture file is a pipe.");
1401 if (!global_capture_opts.has_autostop_filesize &&
1402 !global_capture_opts.has_file_duration) {
1403 cmdarg_err("Multiple capture files requested, but "
1404 "no maximum capture file size or duration was specified.");
1409 /* They didn't specify a "-w" flag, so we won't be saving to a
1410 capture file. Check for options that only make sense if
1411 we're saving to a file. */
1412 if (global_capture_opts.has_autostop_filesize) {
1413 cmdarg_err("Maximum capture file size specified, but "
1414 "capture isn't being saved to a file.");
1417 if (global_capture_opts.multi_files_on) {
1418 cmdarg_err("Multiple capture files requested, but "
1419 "the capture isn't being saved to a file.");
1428 /* Start windows sockets */
1429 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1432 /* Notify all registered modules that have had any of their preferences
1433 changed either from one of the preferences file or from the command
1434 line that their preferences have changed. */
1437 /* At this point MATE will have registered its field array so we can
1438 have a tap filter with one of MATE's late-registered fields as part
1439 of the filter. We can now process all the "-z" arguments. */
1440 start_requested_stats();
1442 /* disabled protocols as per configuration file */
1443 if (gdp_path == NULL && dp_path == NULL) {
1444 set_disabled_protos_list();
1447 /* Build the column format array */
1448 build_column_format_array(&cfile.cinfo, prefs->num_cols, TRUE);
1451 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1452 capture_opts_trim_ring_num_files(&global_capture_opts);
1455 if (rfilter != NULL) {
1456 if (!dfilter_compile(rfilter, &rfcode)) {
1457 cmdarg_err("%s", dfilter_error_msg);
1459 #ifdef HAVE_PCAP_OPEN_DEAD
1463 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1465 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1467 " Note: That display filter code looks like a valid capture filter;");
1469 " maybe you mixed them up?");
1478 cfile.rfcode = rfcode;
1480 if (print_packet_info) {
1481 /* If we're printing as text or PostScript, we have
1482 to create a print stream. */
1483 if (output_action == WRITE_TEXT) {
1484 switch (print_format) {
1487 print_stream = print_stream_text_stdio_new(stdout);
1491 print_stream = print_stream_ps_stdio_new(stdout);
1495 g_assert_not_reached();
1500 /* We have to dissect each packet if:
1502 we're printing information about each packet;
1504 we're using a read filter on the packets;
1506 we're using any taps. */
1507 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1511 * We're reading a capture file.
1515 * Immediately relinquish any special privileges we have; we must not
1516 * be allowed to read any capture files the user running TShark
1519 relinquish_special_privs_perm();
1520 print_current_user();
1522 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1527 /* Set timestamp precision; there should arguably be a command-line
1528 option to let the user set this. */
1529 switch(wtap_file_tsprecision(cfile.wth)) {
1530 case(WTAP_FILE_TSPREC_SEC):
1531 timestamp_set_precision(TS_PREC_AUTO_SEC);
1533 case(WTAP_FILE_TSPREC_DSEC):
1534 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1536 case(WTAP_FILE_TSPREC_CSEC):
1537 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1539 case(WTAP_FILE_TSPREC_MSEC):
1540 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1542 case(WTAP_FILE_TSPREC_USEC):
1543 timestamp_set_precision(TS_PREC_AUTO_USEC);
1545 case(WTAP_FILE_TSPREC_NSEC):
1546 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1549 g_assert_not_reached();
1552 /* Process the packets in the file */
1554 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1555 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1556 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1558 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1565 /* No capture file specified, so we're supposed to do a live capture
1566 (or get a list of link-layer types for a live capture device);
1567 do we have support for live captures? */
1574 cmdarg_err("WinPcap couldn't be found.");
1575 detailed_err = cant_load_winpcap_err("TShark");
1576 cmdarg_err_cont("%s", detailed_err);
1577 g_free(detailed_err);
1582 /* trim the interface name and exit if that failed */
1583 if (!capture_opts_trim_iface(&global_capture_opts,
1584 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1588 /* if requested, list the link layer types and exit */
1589 if (list_link_layer_types) {
1590 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1594 if (print_packet_info) {
1595 if (!write_preamble(NULL)) {
1597 show_print_file_io_error(err);
1600 } else if (!quiet) {
1602 * We're not printing information for each packet, and the user
1603 * didn't ask us not to print a count of packets as they arrive,
1604 * so print that count so the user knows that packets are arriving.
1606 * XXX - what if the user wants to do a live capture, doesn't want
1607 * to save it to a file, doesn't want information printed for each
1608 * packet, does want some "-z" statistic, and wants packet counts
1609 * so they know whether they're seeing any packets?
1611 print_packet_counts = TRUE;
1614 /* For now, assume libpcap gives microsecond precision. */
1615 timestamp_set_precision(TS_PREC_AUTO_USEC);
1619 if (print_packet_info) {
1620 if (!write_finale()) {
1622 show_print_file_io_error(err);
1626 /* No - complain. */
1627 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1634 #if GLIB_CHECK_VERSION(2,10,0)
1635 if (cfile.plist_start != NULL)
1636 g_slice_free_chain(frame_data, cfile.plist_start, next);
1639 draw_tap_listeners(TRUE);
1640 funnel_dump_all_text_windows();
1643 output_fields_free(output_fields);
1644 output_fields = NULL;
1649 /*#define USE_BROKEN_G_MAIN_LOOP*/
1651 #ifdef USE_BROKEN_G_MAIN_LOOP
1654 gboolean loop_running = FALSE;
1656 guint32 packet_count = 0;
1659 /* XXX - move to the right position / file */
1660 /* read from a pipe (callback) */
1661 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1663 typedef struct pipe_input_tag {
1667 pipe_input_cb_t input_cb;
1668 guint pipe_input_id;
1670 GStaticMutex callback_running;
1674 static pipe_input_t pipe_input;
1677 /* The timer has expired, see if there's stuff to read from the pipe,
1678 if so, do the callback */
1680 pipe_timer_cb(gpointer data)
1684 gboolean result, result1;
1686 pipe_input_t *pipe_input = data;
1687 gint iterations = 0;
1690 g_static_mutex_lock (&pipe_input->callback_running);
1692 /* try to read data from the pipe only 5 times, to avoid blocking */
1693 while(iterations < 5) {
1694 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1696 /* Oddly enough although Named pipes don't work on win9x,
1697 PeekNamedPipe does !!! */
1698 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1699 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1701 /* Get the child process exit status */
1702 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1705 /* If the Peek returned an error, or there are bytes to be read
1706 or the childwatcher thread has terminated then call the normal
1708 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1710 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1712 /* And call the real handler */
1713 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1714 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1715 /* pipe closed, return false so that the timer is stopped */
1716 g_static_mutex_unlock (&pipe_input->callback_running);
1721 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1722 /* No data, stop now */
1729 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1731 g_static_mutex_unlock (&pipe_input->callback_running);
1733 /* we didn't stopped the timer, so let it run */
1740 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1743 pipe_input.source = source;
1744 pipe_input.child_process = child_process;
1745 pipe_input.user_data = user_data;
1746 pipe_input.input_cb = input_cb;
1749 g_static_mutex_init(&pipe_input.callback_running);
1750 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1751 do this but that doesn't cover all win32 platforms. GTK can do
1752 this but doesn't seem to work over processes. Attempt to do
1753 something similar here, start a timer and check for data on every
1755 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1756 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1766 #ifdef USE_TSHARK_SELECT
1770 struct sigaction action, oldaction;
1774 * XXX - dropping privileges is still required, until code cleanup is done
1776 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1777 * when it's done, we don't need special privileges to run tshark at all,
1778 * therefore we don't need to drop these privileges
1779 * The only thing we might want to keep is a warning if tshark is run as root,
1780 * as it's no longer necessary and potentially dangerous.
1782 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1783 * We've opened the capture device, so we shouldn't need any special
1784 * privileges any more; relinquish those privileges.
1786 * XXX - if we have saved set-user-ID support, we should give up those
1787 * privileges immediately, and then reclaim them long enough to get
1788 * a list of network interfaces and to open one, and then give them
1789 * up again, so that stuff we do while processing the argument list,
1790 * reading the user's preferences, loading and starting plugins
1791 * (especially *user* plugins), etc. is done with the user's privileges,
1792 * not special privileges.
1794 relinquish_special_privs_perm();
1795 print_current_user();
1797 /* Cleanup all data structures used for dissection. */
1798 cleanup_dissection();
1799 /* Initialize all data structures used for dissection. */
1803 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1804 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1806 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1808 action.sa_handler = capture_cleanup;
1809 action.sa_flags = 0;
1810 sigemptyset(&action.sa_mask);
1811 sigaction(SIGTERM, &action, NULL);
1812 sigaction(SIGINT, &action, NULL);
1813 sigaction(SIGHUP, NULL, &oldaction);
1814 if (oldaction.sa_handler == SIG_DFL)
1815 sigaction(SIGHUP, &action, NULL);
1818 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1819 quiet mode, report the number of packets we've captured. */
1820 action.sa_handler = report_counts_siginfo;
1821 action.sa_flags = 0;
1822 sigemptyset(&action.sa_mask);
1823 sigaction(SIGINFO, &action, NULL);
1824 #endif /* SIGINFO */
1827 global_capture_opts.state = CAPTURE_PREPARING;
1829 /* Let the user know what interface was chosen. */
1830 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1831 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1833 ret = sync_pipe_start(&global_capture_opts);
1838 /* the actual capture loop
1840 * XXX - glib doesn't seem to provide any event based loop handling.
1842 * XXX - for whatever reason,
1843 * calling g_main_loop_new() ends up in 100% cpu load.
1845 * But that doesn't matter: in UNIX we can use select() to find an input
1846 * source with something to do.
1848 * But that doesn't matter because we're in a CLI (that doesn't need to
1849 * update a GUI or something at the same time) so it's OK if we block
1850 * trying to read from the pipe.
1852 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1853 * wrong (but I leave it there in case I am...).
1856 #ifdef USE_TSHARK_SELECT
1858 FD_SET(pipe_input.source, &readfds);
1861 loop_running = TRUE;
1863 while (loop_running)
1865 #ifdef USE_TSHARK_SELECT
1866 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1872 } else if (ret == 1) {
1874 /* Call the real handler */
1875 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1876 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1879 #ifdef USE_TSHARK_SELECT
1888 /* XXX - move the call to main_window_update() out of capture_sync.c */
1889 /* dummy for capture_sync.c to make linker happy */
1890 void main_window_update(void)
1894 /* capture child detected an error */
1896 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1898 cmdarg_err("%s", error_msg);
1899 cmdarg_err_cont("%s", secondary_error_msg);
1903 /* capture child detected an capture filter related error */
1905 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1907 dfilter_t *rfcode = NULL;
1910 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1912 "Invalid capture filter: \"%s\"!\n"
1914 "That string looks like a valid display filter; however, it isn't a valid\n"
1915 "capture filter (%s).\n"
1917 "Note that display filters and capture filters don't have the same syntax,\n"
1918 "so you can't use most display filter expressions as capture filters.\n"
1920 "See the User's Guide for a description of the capture filter syntax.",
1921 capture_opts->cfilter, error_message);
1922 dfilter_free(rfcode);
1925 "Invalid capture filter: \"%s\"!\n"
1927 "That string isn't a valid capture filter (%s).\n"
1928 "See the User's Guide for a description of the capture filter syntax.",
1929 capture_opts->cfilter, error_message);
1934 /* capture child tells us we have a new (or the first) capture file */
1936 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1938 gboolean is_tempfile;
1942 if(capture_opts->state == CAPTURE_PREPARING) {
1943 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1945 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1947 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1949 /* free the old filename */
1950 if (capture_opts->save_file != NULL) {
1952 /* we start a new capture file, close the old one (if we had one before) */
1953 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1954 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1955 wtap_close(((capture_file *) capture_opts->cf)->wth);
1957 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1960 g_free(capture_opts->save_file);
1961 is_tempfile = FALSE;
1963 /* we didn't had a save_file before, must be a tempfile */
1967 /* save the new filename */
1968 capture_opts->save_file = g_strdup(new_file);
1970 /* if we are in real-time mode, open the new file now */
1972 /* Attempt to open the capture file and set up to read from it. */
1973 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1977 /* Don't unlink (delete) the save file - leave it around,
1978 for debugging purposes. */
1979 g_free(capture_opts->save_file);
1980 capture_opts->save_file = NULL;
1985 capture_opts->state = CAPTURE_RUNNING;
1991 /* capture child tells us we have new packets to read */
1993 capture_input_new_packets(capture_options *capture_opts, int to_read)
1999 capture_file *cf = capture_opts->cf;
2000 gboolean filtering_tap_listeners;
2005 * Prevent a SIGINFO handler from writing to stdout while we're
2006 * doing so; instead, have it just set a flag telling us to print
2007 * that information when we're done.
2010 #endif /* SIGINFO */
2012 /* Do we have any tap listeners with filters? */
2013 filtering_tap_listeners = have_filtering_tap_listeners();
2015 /* Get the union of the flags for all tap listeners. */
2016 tap_flags = union_of_tap_listener_flags();
2019 while (to_read-- && cf->wth) {
2020 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2022 /* read from file failed, tell the capture child to stop */
2023 sync_pipe_stop(capture_opts);
2024 wtap_close(cf->wth);
2027 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2028 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2029 filtering_tap_listeners, tap_flags);
2032 /* packet sucessfully read and gone through the "Read Filter" */
2038 * Dumpcap's doing all the work; we're not doing any dissection.
2039 * Count all the packets it wrote.
2041 packet_count += to_read;
2044 if (print_packet_counts) {
2045 /* We're printing packet counts. */
2046 if (packet_count != 0) {
2047 fprintf(stderr, "\r%u ", packet_count);
2048 /* stderr could be line buffered */
2055 * Allow SIGINFO handlers to write.
2060 * If a SIGINFO handler asked us to write out capture counts, do so.
2064 #endif /* SIGINFO */
2070 if (!print_packet_counts) {
2071 /* Report the count only if we aren't printing a packet count
2072 as packets arrive. */
2073 fprintf(stderr, "%u packet%s captured\n", packet_count,
2074 plurality(packet_count, "", "s"));
2077 infoprint = FALSE; /* we just reported it */
2078 #endif /* SIGINFO */
2083 report_counts_siginfo(int signum _U_)
2085 int sav_errno = errno;
2086 /* If we've been told to delay printing, just set a flag asking
2087 that we print counts (if we're supposed to), otherwise print
2088 the count of packets captured (if we're supposed to). */
2095 #endif /* SIGINFO */
2098 /* capture child detected any packet drops? */
2100 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2102 if (print_packet_counts) {
2103 /* We're printing packet counts to stderr.
2104 Send a newline so that we move to the line after the packet count. */
2105 fprintf(stderr, "\n");
2109 /* We're printing packet counts to stderr.
2110 Send a newline so that we move to the line after the packet count. */
2111 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2116 /* capture child closed its side of the pipe, do the required cleanup */
2118 capture_input_closed(capture_options *capture_opts)
2122 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2123 wtap_close(((capture_file *) capture_opts->cf)->wth);
2125 #ifdef USE_BROKEN_G_MAIN_LOOP
2126 /*g_main_loop_quit(loop);*/
2129 loop_running = FALSE;
2138 capture_cleanup(DWORD ctrltype _U_)
2140 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2141 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2142 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2143 like SIGTERM at least when the machine's shutting down.
2145 For now, we handle them all as indications that we should clean up
2146 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2149 However, as handlers run in a new thread, we can't just longjmp
2150 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2151 no other handler - such as one that would terminate the process -
2154 XXX - for some reason, typing ^C to TShark, if you run this in
2155 a Cygwin console window in at least some versions of Cygwin,
2156 causes TShark to terminate immediately; this routine gets
2157 called, but the main loop doesn't get a chance to run and
2158 exit cleanly, at least if this is compiled with Microsoft Visual
2159 C++ (i.e., it's a property of the Cygwin console window or Bash;
2160 it happens if TShark is not built with Cygwin - for all I know,
2161 building it with Cygwin may make the problem go away). */
2163 /* tell the capture child to stop */
2164 sync_pipe_stop(&global_capture_opts);
2166 /* don't stop our own loop already here, otherwise status messages and
2167 * cleanup wouldn't be done properly. The child will indicate the stop of
2168 * everything by calling capture_input_closed() later */
2174 capture_cleanup(int signum _U_)
2176 /* tell the capture child to stop */
2177 sync_pipe_stop(&global_capture_opts);
2180 #endif /* HAVE_LIBPCAP */
2182 #if GLIB_CHECK_VERSION(2,10,0)
2184 process_packet_first_pass(capture_file *cf,
2185 gint64 offset, const struct wtap_pkthdr *whdr,
2186 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2188 frame_data *fdata = g_slice_new(frame_data);
2192 /* Count this packet. */
2195 /* If we're not running a display filter and we're not printing any
2196 packet information, we don't need to do a dissection. This means
2197 that all packets can be marked as 'passed'. */
2200 frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
2202 /* If we're going to print packet information, or we're going to
2203 run a read filter, or we're going to process taps, set up to
2204 do a dissection and do so. */
2205 if (do_dissection) {
2207 /* Grab any resolved addresses */
2208 host_name_lookup_process(NULL);
2210 /* The protocol tree will be "visible", i.e., printed, only if we're
2211 printing packet details, which is true if we're printing stuff
2212 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2214 epan_dissect_init(&edt, FALSE, FALSE);
2216 /* If we're running a read filter, prime the epan_dissect_t with that
2219 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2221 frame_data_set_before_dissect(fdata, &cf->elapsed_time,
2222 &first_ts, &prev_dis_ts, &prev_cap_ts);
2224 epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
2226 /* Run the read filter if we have one. */
2228 passed = dfilter_apply_edt(cf->rfcode, &edt);
2232 frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
2233 cap_file_add_fdata(cf, fdata);
2236 g_slice_free(frame_data, fdata);
2239 epan_dissect_cleanup(&edt);
2245 process_packet_second_pass(capture_file *cf, frame_data *fdata,
2246 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2247 gboolean filtering_tap_listeners, guint tap_flags)
2249 gboolean create_proto_tree;
2254 /* If we're not running a display filter and we're not printing any
2255 packet information, we don't need to do a dissection. This means
2256 that all packets can be marked as 'passed'. */
2259 /* If we're going to print packet information, or we're going to
2260 run a read filter, or we're going to process taps, set up to
2261 do a dissection and do so. */
2262 if (do_dissection) {
2264 /* Grab any resolved addresses */
2265 host_name_lookup_process(NULL);
2267 if (cf->rfcode || verbose || filtering_tap_listeners ||
2268 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2269 create_proto_tree = TRUE;
2271 create_proto_tree = FALSE;
2273 /* The protocol tree will be "visible", i.e., printed, only if we're
2274 printing packet details, which is true if we're printing stuff
2275 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2277 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2279 /* If we're running a read filter, prime the epan_dissect_t with that
2282 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2284 col_custom_prime_edt(&edt, &cf->cinfo);
2286 tap_queue_init(&edt);
2288 /* We only need the columns if either
2290 1) some tap needs the columns
2294 2) we're printing packet info but we're *not* verbose; in verbose
2295 mode, we print the protocol tree, not the protocol summary. */
2296 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2301 epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
2303 tap_push_tapped_queue(&edt);
2305 /* Run the read filter if we have one. */
2307 passed = dfilter_apply_edt(cf->rfcode, &edt);
2311 /* Process this packet. */
2312 if (print_packet_info) {
2313 /* We're printing packet information; print the information for
2316 print_packet(cf, &edt);
2318 print_packet(cf, NULL);
2320 /* The ANSI C standard does not appear to *require* that a line-buffered
2321 stream be flushed to the host environment whenever a newline is
2322 written, it just says that, on such a stream, characters "are
2323 intended to be transmitted to or from the host environment as a
2324 block when a new-line character is encountered".
2326 The Visual C++ 6.0 C implementation doesn't do what is intended;
2327 even if you set a stream to be line-buffered, it still doesn't
2328 flush the buffer at the end of every line.
2330 So, if the "-l" flag was specified, we flush the standard output
2331 at the end of a packet. This will do the right thing if we're
2332 printing packet summary lines, and, as we print the entire protocol
2333 tree for a single packet without waiting for anything to happen,
2334 it should be as good as line-buffered mode if we're printing
2335 protocol trees. (The whole reason for the "-l" flag in either
2336 tcpdump or TShark is to allow the output of a live capture to
2337 be piped to a program or script and to have that script see the
2338 information for the packet as soon as it's printed, rather than
2339 having to wait until a standard I/O buffer fills up. */
2343 if (ferror(stdout)) {
2344 show_print_file_io_error(errno);
2350 if (do_dissection) {
2351 epan_dissect_cleanup(&edt);
2358 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2359 int max_packet_count, gint64 max_byte_count)
2362 int snapshot_length;
2367 char *save_file_string = NULL;
2368 gboolean filtering_tap_listeners;
2371 linktype = wtap_file_encap(cf->wth);
2372 if (save_file != NULL) {
2373 /* Get a string that describes what we're writing to */
2374 save_file_string = output_file_description(save_file);
2376 /* Set up to write to the capture file. */
2377 snapshot_length = wtap_snapshot_length(cf->wth);
2378 if (snapshot_length == 0) {
2379 /* Snapshot length of input file not known. */
2380 snapshot_length = WTAP_MAX_PACKET_SIZE;
2382 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2383 FALSE /* compressed */, &err);
2386 /* We couldn't set up to write to the capture file. */
2389 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2390 cmdarg_err("Capture files can't be written in that format.");
2393 case WTAP_ERR_UNSUPPORTED_ENCAP:
2394 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2395 cmdarg_err("The capture file being read can't be written in "
2399 case WTAP_ERR_CANT_OPEN:
2400 cmdarg_err("The %s couldn't be created for some "
2401 "unknown reason.", save_file_string);
2404 case WTAP_ERR_SHORT_WRITE:
2405 cmdarg_err("A full header couldn't be written to the %s.",
2410 cmdarg_err("The %s could not be created: %s.", save_file_string,
2411 wtap_strerror(err));
2417 if (print_packet_info) {
2418 if (!write_preamble(cf)) {
2420 show_print_file_io_error(err);
2427 /* Do we have any tap listeners with filters? */
2428 filtering_tap_listeners = have_filtering_tap_listeners();
2430 /* Get the union of the flags for all tap listeners. */
2431 tap_flags = union_of_tap_listener_flags();
2433 if (perform_two_pass_analysis) {
2434 #if GLIB_CHECK_VERSION(2,10,0)
2436 int old_max_packet_count = max_packet_count;
2438 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2439 if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
2440 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2441 /* Stop reading if we have the maximum number of packets;
2442 * When the -c option has not been used, max_packet_count
2443 * starts at 0, which practically means, never stop reading.
2444 * (unless we roll over max_packet_count ?)
2446 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2447 err = 0; /* This is not an error */
2453 /* Close the sequential I/O side, to free up memory it requires. */
2454 wtap_sequential_close(cf->wth);
2456 /* Allow the protocol dissectors to free up memory that they
2457 * don't need after the sequential run-through of the packets. */
2458 postseq_cleanup_all_protocols();
2460 max_packet_count = old_max_packet_count;
2462 for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
2463 if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
2464 cf->pd, fdata->cap_len, &err, &err_info)) {
2465 if (process_packet_second_pass(cf, fdata,
2466 &cf->pseudo_header, cf->pd,
2467 filtering_tap_listeners, tap_flags)) {
2468 /* Either there's no read filtering or this packet passed the
2469 filter, so, if we're writing to a capture file, write
2472 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2473 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2475 /* Error writing to a capture file */
2476 show_capture_file_io_error(save_file, err, FALSE);
2477 wtap_dump_close(pdh, &err);
2481 /* Stop reading if we have the maximum number of packets;
2482 * When the -c option has not been used, max_packet_count
2483 * starts at 0, which practically means, never stop reading.
2484 * (unless we roll over max_packet_count ?)
2486 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2487 err = 0; /* This is not an error */
2496 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2497 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2498 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2499 filtering_tap_listeners, tap_flags)) {
2500 /* Either there's no read filtering or this packet passed the
2501 filter, so, if we're writing to a capture file, write
2504 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2505 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2507 /* Error writing to a capture file */
2508 show_capture_file_io_error(save_file, err, FALSE);
2509 wtap_dump_close(pdh, &err);
2513 /* Stop reading if we have the maximum number of packets;
2514 * When the -c option has not been used, max_packet_count
2515 * starts at 0, which practically means, never stop reading.
2516 * (unless we roll over max_packet_count ?)
2518 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2519 err = 0; /* This is not an error */
2527 /* Print a message noting that the read failed somewhere along the line. */
2530 case WTAP_ERR_UNSUPPORTED_ENCAP:
2531 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2532 cf->filename, err_info);
2536 case WTAP_ERR_CANT_READ:
2537 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2541 case WTAP_ERR_SHORT_READ:
2542 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2546 case WTAP_ERR_BAD_RECORD:
2547 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2548 cf->filename, err_info);
2553 cmdarg_err("An error occurred while reading \"%s\": %s.",
2554 cf->filename, wtap_strerror(err));
2557 if (save_file != NULL) {
2558 /* Now close the capture file. */
2559 if (!wtap_dump_close(pdh, &err))
2560 show_capture_file_io_error(save_file, err, TRUE);
2563 if (save_file != NULL) {
2564 /* Now close the capture file. */
2565 if (!wtap_dump_close(pdh, &err))
2566 show_capture_file_io_error(save_file, err, TRUE);
2568 if (print_packet_info) {
2569 if (!write_finale()) {
2571 show_print_file_io_error(err);
2578 wtap_close(cf->wth);
2581 g_free(save_file_string);
2587 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2588 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2589 gboolean filtering_tap_listeners, guint tap_flags)
2592 gboolean create_proto_tree;
2597 /* Count this packet. */
2600 /* If we're not running a display filter and we're not printing any
2601 packet information, we don't need to do a dissection. This means
2602 that all packets can be marked as 'passed'. */
2605 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
2607 /* If we're going to print packet information, or we're going to
2608 run a read filter, or we're going to process taps, set up to
2609 do a dissection and do so. */
2610 if (do_dissection) {
2611 if (print_packet_info && g_resolv_flags)
2612 /* Grab any resolved addresses */
2613 host_name_lookup_process(NULL);
2615 if (cf->rfcode || verbose || filtering_tap_listeners ||
2616 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2617 create_proto_tree = TRUE;
2619 create_proto_tree = FALSE;
2621 /* The protocol tree will be "visible", i.e., printed, only if we're
2622 printing packet details, which is true if we're printing stuff
2623 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2625 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2627 /* If we're running a read filter, prime the epan_dissect_t with that
2630 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2632 col_custom_prime_edt(&edt, &cf->cinfo);
2634 tap_queue_init(&edt);
2636 /* We only need the columns if either
2638 1) some tap needs the columns
2642 2) we're printing packet info but we're *not* verbose; in verbose
2643 mode, we print the protocol tree, not the protocol summary. */
2644 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2649 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
2650 &first_ts, &prev_dis_ts, &prev_cap_ts);
2652 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2654 tap_push_tapped_queue(&edt);
2656 /* Run the read filter if we have one. */
2658 passed = dfilter_apply_edt(cf->rfcode, &edt);
2662 frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
2664 /* Process this packet. */
2665 if (print_packet_info) {
2666 /* We're printing packet information; print the information for
2669 print_packet(cf, &edt);
2671 print_packet(cf, NULL);
2673 /* The ANSI C standard does not appear to *require* that a line-buffered
2674 stream be flushed to the host environment whenever a newline is
2675 written, it just says that, on such a stream, characters "are
2676 intended to be transmitted to or from the host environment as a
2677 block when a new-line character is encountered".
2679 The Visual C++ 6.0 C implementation doesn't do what is intended;
2680 even if you set a stream to be line-buffered, it still doesn't
2681 flush the buffer at the end of every line.
2683 So, if the "-l" flag was specified, we flush the standard output
2684 at the end of a packet. This will do the right thing if we're
2685 printing packet summary lines, and, as we print the entire protocol
2686 tree for a single packet without waiting for anything to happen,
2687 it should be as good as line-buffered mode if we're printing
2688 protocol trees. (The whole reason for the "-l" flag in either
2689 tcpdump or TShark is to allow the output of a live capture to
2690 be piped to a program or script and to have that script see the
2691 information for the packet as soon as it's printed, rather than
2692 having to wait until a standard I/O buffer fills up. */
2696 if (ferror(stdout)) {
2697 show_print_file_io_error(errno);
2703 if (do_dissection) {
2704 epan_dissect_cleanup(&edt);
2705 frame_data_cleanup(&fdata);
2711 write_preamble(capture_file *cf)
2713 switch (output_action) {
2716 return print_preamble(print_stream, cf ? cf->filename : NULL);
2720 write_pdml_preamble(stdout);
2722 write_psml_preamble(stdout);
2723 return !ferror(stdout);
2726 write_fields_preamble(output_fields, stdout);
2727 return !ferror(stdout);
2730 g_assert_not_reached();
2736 get_line_buf(size_t len)
2738 static char *line_bufp = NULL;
2739 static size_t line_buf_len = 256;
2740 size_t new_line_buf_len;
2742 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2743 new_line_buf_len *= 2)
2745 if (line_bufp == NULL) {
2746 line_buf_len = new_line_buf_len;
2747 line_bufp = g_malloc(line_buf_len + 1);
2749 if (new_line_buf_len > line_buf_len) {
2750 line_buf_len = new_line_buf_len;
2751 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2758 print_columns(capture_file *cf)
2765 line_bufp = get_line_buf(256);
2768 for (i = 0; i < cf->cinfo.num_cols; i++) {
2769 switch (cf->cinfo.col_fmt[i]) {
2773 * Don't print this if we're doing a live capture from a network
2774 * interface - if we're doing a live capture, you won't be
2775 * able to look at the capture in the future (it's not being
2776 * saved anywhere), so the frame numbers are unlikely to be
2779 * (XXX - it might be nice to be able to save and print at
2780 * the same time, sort of like an "Update list of packets
2781 * in real time" capture in Wireshark.)
2783 if (global_capture_opts.iface != NULL)
2786 column_len = strlen(cf->cinfo.col_data[i]);
2789 line_bufp = get_line_buf(buf_offset + column_len);
2790 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2796 case COL_ABS_DATE_TIME: /* XXX - wider */
2797 column_len = strlen(cf->cinfo.col_data[i]);
2798 if (column_len < 10)
2800 line_bufp = get_line_buf(buf_offset + column_len);
2801 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2807 case COL_DEF_DL_SRC:
2808 case COL_RES_DL_SRC:
2809 case COL_UNRES_DL_SRC:
2810 case COL_DEF_NET_SRC:
2811 case COL_RES_NET_SRC:
2812 case COL_UNRES_NET_SRC:
2813 column_len = strlen(cf->cinfo.col_data[i]);
2814 if (column_len < 12)
2816 line_bufp = get_line_buf(buf_offset + column_len);
2817 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2823 case COL_DEF_DL_DST:
2824 case COL_RES_DL_DST:
2825 case COL_UNRES_DL_DST:
2826 case COL_DEF_NET_DST:
2827 case COL_RES_NET_DST:
2828 case COL_UNRES_NET_DST:
2829 column_len = strlen(cf->cinfo.col_data[i]);
2830 if (column_len < 12)
2832 line_bufp = get_line_buf(buf_offset + column_len);
2833 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2837 column_len = strlen(cf->cinfo.col_data[i]);
2838 line_bufp = get_line_buf(buf_offset + column_len);
2839 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2842 buf_offset += column_len;
2843 if (i != cf->cinfo.num_cols - 1) {
2845 * This isn't the last column, so we need to print a
2846 * separator between this column and the next.
2848 * If we printed a network source and are printing a
2849 * network destination of the same type next, separate
2850 * them with "->"; if we printed a network destination
2851 * and are printing a network source of the same type
2852 * next, separate them with "<-"; otherwise separate them
2855 * We add enough space to the buffer for " <- " or " -> ",
2856 * even if we're only adding " ".
2858 line_bufp = get_line_buf(buf_offset + 4);
2859 switch (cf->cinfo.col_fmt[i]) {
2864 switch (cf->cinfo.col_fmt[i + 1]) {
2869 strcat(line_bufp + buf_offset, " -> ");
2874 strcat(line_bufp + buf_offset, " ");
2880 case COL_DEF_DL_SRC:
2881 case COL_RES_DL_SRC:
2882 case COL_UNRES_DL_SRC:
2883 switch (cf->cinfo.col_fmt[i + 1]) {
2885 case COL_DEF_DL_DST:
2886 case COL_RES_DL_DST:
2887 case COL_UNRES_DL_DST:
2888 strcat(line_bufp + buf_offset, " -> ");
2893 strcat(line_bufp + buf_offset, " ");
2899 case COL_DEF_NET_SRC:
2900 case COL_RES_NET_SRC:
2901 case COL_UNRES_NET_SRC:
2902 switch (cf->cinfo.col_fmt[i + 1]) {
2904 case COL_DEF_NET_DST:
2905 case COL_RES_NET_DST:
2906 case COL_UNRES_NET_DST:
2907 strcat(line_bufp + buf_offset, " -> ");
2912 strcat(line_bufp + buf_offset, " ");
2921 switch (cf->cinfo.col_fmt[i + 1]) {
2926 strcat(line_bufp + buf_offset, " <- ");
2931 strcat(line_bufp + buf_offset, " ");
2937 case COL_DEF_DL_DST:
2938 case COL_RES_DL_DST:
2939 case COL_UNRES_DL_DST:
2940 switch (cf->cinfo.col_fmt[i + 1]) {
2942 case COL_DEF_DL_SRC:
2943 case COL_RES_DL_SRC:
2944 case COL_UNRES_DL_SRC:
2945 strcat(line_bufp + buf_offset, " <- ");
2950 strcat(line_bufp + buf_offset, " ");
2956 case COL_DEF_NET_DST:
2957 case COL_RES_NET_DST:
2958 case COL_UNRES_NET_DST:
2959 switch (cf->cinfo.col_fmt[i + 1]) {
2961 case COL_DEF_NET_SRC:
2962 case COL_RES_NET_SRC:
2963 case COL_UNRES_NET_SRC:
2964 strcat(line_bufp + buf_offset, " <- ");
2969 strcat(line_bufp + buf_offset, " ");
2976 strcat(line_bufp + buf_offset, " ");
2982 return print_line(print_stream, 0, line_bufp);
2986 print_packet(capture_file *cf, epan_dissect_t *edt)
2988 print_args_t print_args;
2991 /* Print the information in the protocol tree. */
2992 switch (output_action) {
2995 print_args.to_file = TRUE;
2996 print_args.format = print_format;
2997 print_args.print_summary = !verbose;
2998 print_args.print_hex = verbose && print_hex;
2999 print_args.print_formfeed = FALSE;
3000 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
3002 /* init the packet range */
3003 packet_range_init(&print_args.range);
3005 if (!proto_tree_print(&print_args, edt, print_stream))
3008 /* "print_hex_data()" will put out a leading blank line, as well
3009 as a trailing one; print one here, to separate the packets,
3010 only if "print_hex_data()" won't be called. */
3011 if (!print_line(print_stream, 0, ""))
3017 proto_tree_write_pdml(edt, stdout);
3019 return !ferror(stdout);
3021 proto_tree_write_fields(output_fields, edt, stdout);
3023 return !ferror(stdout);
3026 /* Just fill in the columns. */
3027 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
3029 /* Now print them. */
3030 switch (output_action) {
3033 if (!print_columns(cf))
3038 proto_tree_write_psml(edt, stdout);
3039 return !ferror(stdout);
3040 case WRITE_FIELDS: /*No non-verbose "fields" format */
3041 g_assert_not_reached();
3046 if (!print_hex_data(print_stream, edt))
3048 if (!print_line(print_stream, 0, ""))
3057 switch (output_action) {
3060 return print_finale(print_stream);
3064 write_pdml_finale(stdout);
3066 write_psml_finale(stdout);
3067 return !ferror(stdout);
3070 write_fields_finale(output_fields, stdout);
3071 return !ferror(stdout);
3074 g_assert_not_reached();
3080 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3084 char err_msg[2048+1];
3086 wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
3090 /* The open succeeded. Fill in the information for this file. */
3092 /* Cleanup all data structures used for dissection. */
3093 cleanup_dissection();
3094 /* Initialize all data structures used for dissection. */
3098 cf->f_datalen = 0; /* not used, but set it anyway */
3100 /* Set the file name because we need it to set the follow stream filter.
3101 XXX - is that still true? We need it for other reasons, though,
3103 cf->filename = g_strdup(fname);
3105 /* Indicate whether it's a permanent or temporary file. */
3106 cf->is_tempfile = is_tempfile;
3108 /* If it's a temporary capture buffer file, mark it as not saved. */
3109 cf->user_saved = !is_tempfile;
3111 cf->cd_t = wtap_file_type(cf->wth);
3113 cf->drops_known = FALSE;
3115 cf->snap = wtap_snapshot_length(cf->wth);
3116 if (cf->snap == 0) {
3117 /* Snapshot length not known. */
3118 cf->has_snap = FALSE;
3119 cf->snap = WTAP_MAX_PACKET_SIZE;
3121 cf->has_snap = TRUE;
3122 nstime_set_zero(&cf->elapsed_time);
3123 nstime_set_unset(&first_ts);
3124 nstime_set_unset(&prev_dis_ts);
3125 nstime_set_unset(&prev_cap_ts);
3127 cf->state = FILE_READ_IN_PROGRESS;
3132 g_snprintf(err_msg, sizeof err_msg,
3133 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3134 cmdarg_err("%s", err_msg);
3139 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
3141 char *save_file_string;
3143 save_file_string = output_file_description(fname);
3148 cmdarg_err("Not all the packets could be written to the %s because there is "
3149 "no space left on the file system.",
3155 cmdarg_err("Not all the packets could be written to the %s because you are "
3156 "too close to, or over your disk quota.",
3161 case WTAP_ERR_CANT_CLOSE:
3162 cmdarg_err("The %s couldn't be closed for some unknown reason.",
3166 case WTAP_ERR_SHORT_WRITE:
3167 cmdarg_err("Not all the packets could be written to the %s.",
3173 cmdarg_err("The %s could not be closed: %s.", save_file_string,
3174 wtap_strerror(err));
3176 cmdarg_err("An error occurred while writing to the %s: %s.",
3177 save_file_string, wtap_strerror(err));
3181 g_free(save_file_string);
3185 show_print_file_io_error(int err)
3190 cmdarg_err("Not all the packets could be printed because there is "
3191 "no space left on the file system.");
3196 cmdarg_err("Not all the packets could be printed because you are "
3197 "too close to, or over your disk quota.");
3202 cmdarg_err("An error occurred while printing packets: %s.",
3209 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
3213 static char errmsg_errno[1024+1];
3216 /* Wiretap error. */
3219 case WTAP_ERR_NOT_REGULAR_FILE:
3220 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
3223 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
3224 /* Seen only when opening a capture file for reading. */
3225 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
3228 case WTAP_ERR_UNSUPPORTED:
3229 /* Seen only when opening a capture file for reading. */
3230 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3231 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
3234 errmsg = errmsg_errno;
3237 case WTAP_ERR_CANT_WRITE_TO_PIPE:
3238 /* Seen only when opening a capture file for writing. */
3239 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3240 "The file \"%%s\" is a pipe, and %s capture files can't be "
3241 "written to a pipe.", wtap_file_type_string(file_type));
3242 errmsg = errmsg_errno;
3245 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
3246 /* Seen only when opening a capture file for writing. */
3247 errmsg = "TShark doesn't support writing capture files in that format.";
3250 case WTAP_ERR_UNSUPPORTED_ENCAP:
3252 errmsg = "TShark can't save this capture in that format.";
3254 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3255 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3258 errmsg = errmsg_errno;
3262 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3264 errmsg = "TShark can't save this capture in that format.";
3266 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3269 case WTAP_ERR_BAD_RECORD:
3270 /* Seen only when opening a capture file for reading. */
3271 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3272 "The file \"%%s\" appears to be damaged or corrupt.\n"
3275 errmsg = errmsg_errno;
3278 case WTAP_ERR_CANT_OPEN:
3280 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3282 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3285 case WTAP_ERR_SHORT_READ:
3286 errmsg = "The file \"%s\" appears to have been cut short"
3287 " in the middle of a packet or other data.";
3290 case WTAP_ERR_SHORT_WRITE:
3291 errmsg = "A full header couldn't be written to the file \"%s\".";
3295 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3296 "The file \"%%s\" could not be %s: %s.",
3297 for_writing ? "created" : "opened",
3298 wtap_strerror(err));
3299 errmsg = errmsg_errno;
3303 errmsg = file_open_error_message(err, for_writing);
3308 * Open/create errors are reported with an console message in TShark.
3311 open_failure_message(const char *filename, int err, gboolean for_writing)
3313 fprintf(stderr, "tshark: ");
3314 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3315 fprintf(stderr, "\n");
3320 * General errors are reported with an console message in TShark.
3323 failure_message(const char *msg_format, va_list ap)
3325 fprintf(stderr, "tshark: ");
3326 vfprintf(stderr, msg_format, ap);
3327 fprintf(stderr, "\n");
3331 * Read errors are reported with an console message in TShark.
3334 read_failure_message(const char *filename, int err)
3336 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3337 filename, strerror(err));
3341 * Write errors are reported with an console message in TShark.
3344 write_failure_message(const char *filename, int err)
3346 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3347 filename, strerror(err));
3351 * Report an error in command-line arguments.
3354 cmdarg_err(const char *fmt, ...)
3359 failure_message(fmt, ap);
3364 * Report additional information for an error in command-line arguments.
3367 cmdarg_err_cont(const char *fmt, ...)
3372 vfprintf(stderr, fmt, ap);
3373 fprintf(stderr, "\n");