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
63 #include <epan/epan.h>
64 #include <epan/filesystem.h>
65 #include <wsutil/privileges.h>
68 #include <epan/timestamp.h>
69 #include <epan/packet.h>
71 #include "disabled_protos.h"
72 #include <epan/prefs.h>
73 #include <epan/column.h>
75 #include <epan/addr_resolv.h>
77 #include "clopts_common.h"
78 #include "cmdarg_err.h"
79 #include "version_info.h"
80 #include <epan/plugins.h>
82 #include <epan/epan_dissect.h>
84 #include <epan/stat_cmd_args.h>
85 #include <epan/timestamp.h>
86 #include <epan/ex-opt.h>
89 #include "capture_ui_utils.h"
91 #include "capture-pcap-util.h"
93 #include "capture-wpcap.h"
94 #include "capture_errs.h"
96 #include "capture_sync.h"
97 #endif /* HAVE_LIBPCAP */
99 #include <epan/funnel.h>
103 * This is the template for the decode as option; it is shared between the
104 * various functions that output the usage for this parameter.
106 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
108 static nstime_t first_ts;
109 static nstime_t prev_dis_ts;
110 static nstime_t prev_cap_ts;
111 static GString *comp_info_str, *runtime_info_str;
113 static gboolean print_packet_info; /* TRUE if we're to print packet information */
115 * The way the packet decode is to be written.
118 WRITE_TEXT, /* summary or detail text */
119 WRITE_XML, /* PDML or PSML */
120 WRITE_FIELDS /* User defined list of fields */
121 /* Add CSV and the like here */
123 static output_action_e output_action;
124 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
125 static gboolean verbose;
126 static gboolean print_hex;
127 static gboolean line_buffered;
128 static guint32 cum_bytes = 0;
129 static print_format_e print_format = PR_FMT_TEXT;
130 static print_stream_t *print_stream;
132 static output_fields_t* output_fields = NULL;
135 * Standard secondary message for unexpected errors.
137 static const char please_report[] =
138 "Please report this to the Wireshark developers";
142 * TRUE if we're to print packet counts to keep track of captured packets.
144 static gboolean print_packet_counts;
147 static capture_options global_capture_opts;
150 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
151 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
154 static int capture(void);
155 static void report_counts(void);
157 static BOOL WINAPI capture_cleanup(DWORD);
159 static void capture_cleanup(int);
161 static void report_counts_siginfo(int);
164 #endif /* HAVE_LIBPCAP */
166 static int load_cap_file(capture_file *, char *, int, int, gint64);
167 static gboolean process_packet(capture_file *cf, gint64 offset,
168 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
170 static void show_capture_file_io_error(const char *, int, gboolean);
171 static void show_print_file_io_error(int err);
172 static gboolean write_preamble(capture_file *cf);
173 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
174 static gboolean write_finale(void);
175 static const char *cf_open_error_message(int err, gchar *err_info,
176 gboolean for_writing, int file_type);
178 static void open_failure_message(const char *filename, int err,
179 gboolean for_writing);
180 static void failure_message(const char *msg_format, va_list ap);
181 static void read_failure_message(const char *filename, int err);
182 static void write_failure_message(const char *filename, int err);
187 * Mark a particular frame.
191 cf_mark_frame(capture_file *cf, frame_data *frame)
193 if (! frame->flags.marked) {
194 frame->flags.marked = TRUE;
195 if (cf->count > cf->marked_count)
201 * Unmark a particular frame.
205 cf_unmark_frame(capture_file *cf, frame_data *frame)
207 if (frame->flags.marked) {
208 frame->flags.marked = FALSE;
209 if (cf->marked_count > 0)
215 static void list_capture_types(void) {
218 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
219 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
220 if (wtap_dump_can_open(i))
221 fprintf(stderr, " %s - %s\n",
222 wtap_file_type_short_string(i), wtap_file_type_string(i));
227 print_usage(gboolean print_ver)
234 "TShark " VERSION "%s\n"
235 "Dump and analyze network traffic.\n"
236 "See http://www.wireshark.org for more information.\n"
239 wireshark_svnversion, get_copyright_info());
243 fprintf(output, "\n");
244 fprintf(output, "Usage: tshark [options] ...\n");
245 fprintf(output, "\n");
248 fprintf(output, "Capture interface:\n");
249 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
250 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
251 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
252 fprintf(output, " -p don't capture in promiscuous mode\n");
254 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
256 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
257 fprintf(output, " -D print list of interfaces and exit\n");
258 fprintf(output, " -L print list of link-layer types of iface and exit\n");
259 fprintf(output, "\n");
260 fprintf(output, "Capture stop conditions:\n");
261 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
262 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
263 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
264 fprintf(output, " files:NUM - stop after NUM files\n");
265 /*fprintf(output, "\n");*/
266 fprintf(output, "Capture output:\n");
267 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
268 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
269 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
270 #endif /* HAVE_LIBPCAP */
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Input file:\n");
274 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
276 fprintf(output, "\n");
277 fprintf(output, "Processing:\n");
278 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
279 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
280 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
281 fprintf(output, " -d %s ...\n", decode_as_arg_template);
282 fprintf(output, " \"Decode As\", see the man page for details\n");
283 fprintf(output, " Example: tcp.port==8888,http\n");
285 /*fprintf(output, "\n");*/
286 fprintf(output, "Output:\n");
287 fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\n");
288 fprintf(output, " -C <config profile> start with specified configuration profile\n");
289 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
290 fprintf(output, " an empty \"-F\" option will list the file types\n");
291 fprintf(output, " -V add output of packet tree (Packet Details)\n");
292 fprintf(output, " -S display packets even when writing to a file\n");
293 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
294 fprintf(output, " -T pdml|ps|psml|text|fields\n");
295 fprintf(output, " format of text output (def: text)\n");
296 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
297 fprintf(output, " this option can be repeated to print multiple fields\n");
298 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
299 fprintf(output, " header=y|n switch headers on and off\n");
300 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
301 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
302 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
303 fprintf(output, " -l flush standard output after each packet\n");
304 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
305 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
306 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
308 fprintf(output, "\n");
309 fprintf(output, "Miscellaneous:\n");
310 fprintf(output, " -h display this help and exit\n");
311 fprintf(output, " -v display version info and exit\n");
312 fprintf(output, " -o <name>:<value> ... override preference setting\n");
313 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
317 * For a dissector table, print on the stream described by output,
318 * its short name (which is what's used in the "-d" option) and its
322 display_dissector_table_names(const char *table_name, const char *ui_name,
325 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
329 * For a dissector handle, print on the stream described by output,
330 * the filter name (which is what's used in the "-d" option) and the full
331 * name for the protocol that corresponds to this handle.
334 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
337 const gchar* proto_filter_name;
338 const gchar* proto_ui_name;
340 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
342 if (proto_id != -1) {
343 proto_filter_name = proto_get_protocol_filter_name(proto_id);
344 proto_ui_name = proto_get_protocol_name(proto_id);
345 g_assert(proto_filter_name != NULL);
346 g_assert(proto_ui_name != NULL);
348 fprintf((FILE *)output, "\t%s (%s)\n",
355 * The protocol_name_search structure is used by find_protocol_name_func()
356 * to pass parameters and store results
358 struct protocol_name_search{
359 gchar *searched_name; /* Protocol filter name we are looking for */
360 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
361 guint nb_match; /* How many dissectors matched searched_name */
363 typedef struct protocol_name_search *protocol_name_search_t;
366 * This function parses all dissectors associated with a table to find the
367 * one whose protocol has the specified filter name. It is called
368 * as a reference function in a call to dissector_table_foreach_handle.
369 * The name we are looking for, as well as the results, are stored in the
370 * protocol_name_search struct pointed to by user_data.
371 * If called using dissector_table_foreach_handle, we actually parse the
372 * whole list of dissectors.
375 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
379 const gchar *protocol_filter_name;
380 protocol_name_search_t search_info;
384 search_info = (protocol_name_search_t)user_data;
386 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
387 if (proto_id != -1) {
388 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
389 g_assert(protocol_filter_name != NULL);
390 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
392 if (search_info->nb_match == 0) {
393 /* Record this handle only if this is the first match */
394 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
396 search_info->nb_match++;
402 * Print all layer type names supported.
403 * We send the output to the stream described by the handle output.
407 fprint_all_layer_types(FILE *output)
410 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
414 * Print all protocol names supported for a specific layer type.
415 * table_name contains the layer type name in which the search is performed.
416 * We send the output to the stream described by the handle output.
420 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
423 dissector_table_foreach_handle(table_name,
424 display_dissector_names,
429 * The function below parses the command-line parameters for the decode as
430 * feature (a string pointer by cl_param).
431 * It checks the format of the command-line, searches for a matching table
432 * and dissector. If a table/dissector match is not found, we display a
433 * summary of the available tables/dissectors (on stderr) and return FALSE.
434 * If everything is fine, we get the "Decode as" preference activated,
435 * then we return TRUE.
438 add_decode_as(const gchar *cl_param)
442 gchar *decoded_param;
443 gchar *remaining_param;
445 gchar *dissector_str;
446 dissector_handle_t dissector_matching;
447 dissector_table_t table_matching;
448 ftenum_t dissector_table_selector_type;
449 struct protocol_name_search user_protocol_name;
451 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
454 decoded_param = g_strdup(cl_param);
455 g_assert(decoded_param);
458 /* The lines below will parse this string (modifying it) to extract all
459 necessary information. Note that decoded_param is still needed since
460 strings are not copied - we just save pointers. */
462 /* This section extracts a layer type (table_name) from decoded_param */
463 table_name = decoded_param; /* Layer type string starts from beginning */
465 remaining_param = strchr(table_name, '=');
466 if (remaining_param == NULL) {
467 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
468 /* If the argument does not follow the template, carry on anyway to check
469 if the table name is at least correct. If remaining_param is NULL,
470 we'll exit anyway further down */
473 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
476 /* Remove leading and trailing spaces from the table name */
477 while ( table_name[0] == ' ' )
479 while ( table_name[strlen(table_name) - 1] == ' ' )
480 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
482 /* The following part searches a table matching with the layer type specified */
483 table_matching = NULL;
485 /* Look for the requested table */
486 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
487 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
490 table_matching = find_dissector_table(table_name);
491 if (!table_matching) {
492 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
496 if (!table_matching) {
497 /* Display a list of supported layer types to help the user, if the
498 specified layer type was not found */
499 cmdarg_err("Valid layer types are:");
500 fprint_all_layer_types(stderr);
502 if (remaining_param == NULL || !table_matching) {
503 /* Exit if the layer type was not found, or if no '=' separator was found
505 g_free(decoded_param);
509 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
510 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
513 remaining_param++; /* Move to the second '=' */
514 *remaining_param = '\0'; /* Remove the second '=' */
516 remaining_param++; /* Position after the layer type string */
518 /* This section extracts a selector value (selector_str) from decoded_param */
520 selector_str = remaining_param; /* Next part starts with the selector number */
522 remaining_param = strchr(selector_str, ',');
523 if (remaining_param == NULL) {
524 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
525 /* If the argument does not follow the template, carry on anyway to check
526 if the selector value is at least correct. If remaining_param is NULL,
527 we'll exit anyway further down */
530 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
533 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
535 switch (dissector_table_selector_type) {
541 /* The selector for this table is an unsigned number. Parse it as such.
542 There's no need to remove leading and trailing spaces from the
543 selector number string, because sscanf will do that for us. */
544 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
545 cmdarg_err("Invalid selector number \"%s\"", selector_str);
546 g_free(decoded_param);
554 /* The selector for this table is a string. */
558 /* There are currently no dissector tables with any types other
559 than the ones listed above. */
560 g_assert_not_reached();
563 if (remaining_param == NULL) {
564 /* Exit if no ',' separator was found (see above) */
565 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
566 fprint_all_protocols_for_layer_types(stderr, table_name);
567 g_free(decoded_param);
571 remaining_param++; /* Position after the selector number string */
573 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
575 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
577 /* Remove leading and trailing spaces from the dissector name */
578 while ( dissector_str[0] == ' ' )
580 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
581 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
583 dissector_matching = NULL;
585 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
586 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 */
587 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
590 user_protocol_name.nb_match = 0;
591 user_protocol_name.searched_name = dissector_str;
592 user_protocol_name.matched_handle = NULL;
594 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 */
596 if (user_protocol_name.nb_match != 0) {
597 dissector_matching = user_protocol_name.matched_handle;
598 if (user_protocol_name.nb_match > 1) {
599 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
603 /* OK, check whether the problem is that there isn't any such
604 protocol, or that there is but it's not specified as a protocol
605 that's valid for that dissector table.
606 Note, we don't exit here, but dissector_matching will remain NULL,
608 if (proto_get_id_by_filter_name(dissector_str) == -1) {
609 /* No such protocol */
610 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
612 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
613 dissector_str, table_name);
618 if (!dissector_matching) {
619 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
620 fprint_all_protocols_for_layer_types(stderr, table_name);
621 g_free(decoded_param);
625 /* This is the end of the code that parses the command-line options.
626 All information is now stored in the variables:
630 The above variables that are strings are still pointing to areas within
631 decoded_parm. decoded_parm thus still needs to be kept allocated in
632 until we stop needing these variables
633 decoded_param will be deallocated at each exit point of this function */
636 /* We now have a pointer to the handle for the requested dissector
637 (requested protocol) inside the variable dissector_matching */
638 switch (dissector_table_selector_type) {
644 /* The selector for this table is an unsigned number. */
645 dissector_change(table_name, selector, dissector_matching);
651 /* The selector for this table is a string. */
652 dissector_change_string(table_name, selector_str, dissector_matching);
656 /* There are currently no dissector tables with any types other
657 than the ones listed above. */
658 g_assert_not_reached();
660 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
665 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
666 const gchar *message _U_, gpointer user_data _U_)
671 output_file_description(const char *fname)
673 char *save_file_string;
675 /* Get a string that describes what we're writing to */
676 if (strcmp(fname, "-") == 0) {
677 /* We're writing to the standard output */
678 save_file_string = g_strdup("standard output");
680 /* We're writing to a file with the name in save_file */
681 save_file_string = g_strdup_printf("file \"%s\"", fname);
683 return save_file_string;
687 print_current_user(void) {
688 gchar *cur_user, *cur_group;
689 if (started_with_special_privs()) {
690 cur_user = get_cur_username();
691 cur_group = get_cur_groupname();
692 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
693 cur_user, cur_group);
696 if (running_with_special_privs()) {
697 fprintf(stderr, " This could be dangerous.");
699 fprintf(stderr, "\n");
704 check_capture_privs(void) {
707 /* Warn the user if npf.sys isn't loaded. */
708 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
709 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
710 "capturing or\nlisting interfaces.\n");
718 main(int argc, char *argv[])
720 char *init_progfile_dir_error;
723 gboolean arg_error = FALSE;
729 char *gpf_path, *pf_path;
730 char *gdp_path, *dp_path;
731 int gpf_open_errno, gpf_read_errno;
732 int pf_open_errno, pf_read_errno;
733 int gdp_open_errno, gdp_read_errno;
734 int dp_open_errno, dp_read_errno;
737 gboolean list_link_layer_types = FALSE;
738 gboolean start_capture = FALSE;
741 gboolean capture_option_specified = FALSE;
743 gboolean quiet = FALSE;
744 int out_file_type = WTAP_FILE_PCAP;
745 gchar *cf_name = NULL, *rfilter = NULL;
746 #ifdef HAVE_PCAP_OPEN_DEAD
747 struct bpf_program fcode;
749 dfilter_t *rfcode = NULL;
752 GLogLevelFlags log_flags;
755 #define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:K:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
758 #define OPTSTRING_WIN32 "B:"
760 #define OPTSTRING_WIN32 ""
763 #define OPTSTRING_WIN32 ""
764 #endif /* HAVE_LIBPCAP */
766 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
769 * Get credential information for later use.
771 get_credential_info();
774 * Attempt to get the pathname of the executable file.
776 init_progfile_dir_error = init_progfile_dir(argv[0], main);
777 if (init_progfile_dir_error != NULL) {
778 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
779 init_progfile_dir_error);
783 * In order to have the -X opts assigned before the wslua machine starts
784 * we need to call getopts before epan_init() gets called.
787 optind_initial = optind;
789 while ((opt = getopt(argc, argv, optstring)) != -1) {
791 case 'C': /* Configuration Profile */
792 if (profile_exists (optarg)) {
793 set_profile_name (optarg);
795 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
807 optind = optind_initial;
810 /* nothing more than the standard GLib handler, but without a warning */
817 g_log_set_handler(NULL,
819 log_func_ignore, NULL /* user_data */);
820 g_log_set_handler(LOG_DOMAIN_CAPTURE,
822 log_func_ignore, NULL /* user_data */);
824 initialize_funnel_ops();
827 capture_opts_init(&global_capture_opts, &cfile);
830 timestamp_set_type(TS_RELATIVE);
831 timestamp_set_precision(TS_PREC_AUTO);
833 /* Register all dissectors; we must do this before checking for the
834 "-G" flag, as the "-G" flag dumps information registered by the
835 dissectors, and we must do it before we read the preferences, in
836 case any dissectors register preferences. */
837 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
838 failure_message, open_failure_message, read_failure_message,
839 write_failure_message);
841 /* Register all tap listeners; we do this before we parse the arguments,
842 as the "-z" argument can specify a registered tap. */
844 /* we register the plugin taps before the other taps because
845 stats_tree taps plugins will be registered as tap listeners
846 by stats_tree_stat.c and need to registered before that */
848 register_all_plugin_tap_listeners();
850 register_all_tap_listeners();
852 /* Now register the preferences for any non-dissector modules.
853 We must do that before we read the preferences as well. */
854 prefs_register_modules();
856 /* If invoked with the "-G" flag, we dump out information based on
857 the argument to the "-G" flag; if no argument is specified,
858 for backwards compatibility we dump out a glossary of display
861 XXX - we do this here, for now, to support "-G" with no arguments.
862 If none of our build or other processes uses "-G" with no arguments,
863 we can just process it with the other arguments. */
864 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
865 proto_initialize_all_prefixes();
868 proto_registrar_dump_fields(1);
870 if (strcmp(argv[2], "fields") == 0)
871 proto_registrar_dump_fields(1);
872 else if (strcmp(argv[2], "fields2") == 0)
873 proto_registrar_dump_fields(2);
874 else if (strcmp(argv[2], "fields3") == 0)
875 proto_registrar_dump_fields(3);
876 else if (strcmp(argv[2], "protocols") == 0)
877 proto_registrar_dump_protocols();
878 else if (strcmp(argv[2], "values") == 0)
879 proto_registrar_dump_values();
880 else if (strcmp(argv[2], "decodes") == 0)
881 dissector_dump_decodes();
882 else if (strcmp(argv[2], "defaultprefs") == 0)
884 else if (strcmp(argv[2], "currentprefs") == 0) {
885 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
886 &pf_open_errno, &pf_read_errno, &pf_path);
889 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
896 /* Set the C-language locale to the native environment. */
897 setlocale(LC_ALL, "");
899 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
900 &pf_open_errno, &pf_read_errno, &pf_path);
901 if (gpf_path != NULL) {
902 if (gpf_open_errno != 0) {
903 cmdarg_err("Can't open global preferences file \"%s\": %s.",
904 pf_path, strerror(gpf_open_errno));
906 if (gpf_read_errno != 0) {
907 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
908 pf_path, strerror(gpf_read_errno));
911 if (pf_path != NULL) {
912 if (pf_open_errno != 0) {
913 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
914 strerror(pf_open_errno));
916 if (pf_read_errno != 0) {
917 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
918 pf_path, strerror(pf_read_errno));
924 /* Set the name resolution code's flags from the preferences. */
925 g_resolv_flags = prefs->name_resolve;
927 /* Read the disabled protocols file. */
928 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
929 &dp_path, &dp_open_errno, &dp_read_errno);
930 if (gdp_path != NULL) {
931 if (gdp_open_errno != 0) {
932 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
933 gdp_path, strerror(gdp_open_errno));
935 if (gdp_read_errno != 0) {
936 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
937 gdp_path, strerror(gdp_read_errno));
941 if (dp_path != NULL) {
942 if (dp_open_errno != 0) {
944 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
945 strerror(dp_open_errno));
947 if (dp_read_errno != 0) {
949 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
950 strerror(dp_read_errno));
955 check_capture_privs();
957 init_cap_file(&cfile);
959 /* Assemble the compile-time version information string */
960 comp_info_str = g_string_new("Compiled ");
961 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
963 /* Assemble the run-time version information string */
964 runtime_info_str = g_string_new("Running ");
965 get_runtime_version_info(runtime_info_str, NULL);
967 /* Print format defaults to this. */
968 print_format = PR_FMT_TEXT;
970 output_fields = output_fields_new();
972 /* Now get our args */
973 while ((opt = getopt(argc, argv, optstring)) != -1) {
975 case 'a': /* autostop criteria */
976 case 'b': /* Ringbuffer option */
977 case 'c': /* Capture x packets */
978 case 'f': /* capture filter */
979 case 'i': /* Use interface x */
980 case 'p': /* Don't capture in promiscuous mode */
981 case 's': /* Set the snapshot (capture) length */
982 case 'w': /* Write to capture file x */
983 case 'y': /* Set the pcap data link type */
985 case 'B': /* Buffer size */
988 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
993 capture_option_specified = TRUE;
998 /* Configuration profile settings were already processed just ignore them this time*/
1000 case 'd': /* Decode as rule */
1001 if (!add_decode_as(optarg))
1004 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1005 case 'K': /* Kerberos keytab file */
1006 read_keytab_file(optarg);
1009 case 'D': /* Print a list of capture devices and exit */
1011 status = capture_opts_list_interfaces(FALSE);
1014 capture_option_specified = TRUE;
1020 output_fields_add(output_fields, optarg);
1024 if(!output_fields_set_option(output_fields, optarg)) {
1025 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1026 output_fields_list_options(stderr);
1031 out_file_type = wtap_short_string_to_file_type(optarg);
1032 if (out_file_type < 0) {
1033 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1034 list_capture_types();
1038 case 'h': /* Print help and exit */
1042 case 'l': /* "Line-buffer" standard output */
1043 /* This isn't line-buffering, strictly speaking, it's just
1044 flushing the standard output after the information for
1045 each packet is printed; however, that should be good
1046 enough for all the purposes to which "-l" is put (and
1047 is probably actually better for "-V", as it does fewer
1050 See the comment in "process_packet()" for an explanation of
1051 why we do that, and why we don't just use "setvbuf()" to
1052 make the standard output line-buffered (short version: in
1053 Windows, "line-buffered" is the same as "fully-buffered",
1054 and the output buffer is only flushed when it fills up). */
1055 line_buffered = TRUE;
1057 case 'L': /* Print list of link-layer types and exit */
1059 list_link_layer_types = TRUE;
1061 capture_option_specified = TRUE;
1065 case 'n': /* No name resolution */
1066 g_resolv_flags = RESOLV_NONE;
1068 case 'N': /* Select what types of addresses/port #s to resolve */
1069 if (g_resolv_flags == RESOLV_ALL)
1070 g_resolv_flags = RESOLV_NONE;
1071 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1072 if (badopt != '\0') {
1073 cmdarg_err("-N specifies unknown resolving option '%c';",
1075 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1079 case 'o': /* Override preference from command line */
1080 switch (prefs_set_pref(optarg)) {
1085 case PREFS_SET_SYNTAX_ERR:
1086 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1090 case PREFS_SET_NO_SUCH_PREF:
1091 case PREFS_SET_OBSOLETE:
1092 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1097 case 'q': /* Quiet */
1100 case 'r': /* Read capture file x */
1101 cf_name = g_strdup(optarg);
1103 case 'R': /* Read file filter */
1106 case 'S': /* show packets in real time */
1107 print_packet_info = TRUE;
1109 case 't': /* Time stamp type */
1110 if (strcmp(optarg, "r") == 0)
1111 timestamp_set_type(TS_RELATIVE);
1112 else if (strcmp(optarg, "a") == 0)
1113 timestamp_set_type(TS_ABSOLUTE);
1114 else if (strcmp(optarg, "ad") == 0)
1115 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1116 else if (strcmp(optarg, "d") == 0)
1117 timestamp_set_type(TS_DELTA);
1118 else if (strcmp(optarg, "dd") == 0)
1119 timestamp_set_type(TS_DELTA_DIS);
1120 else if (strcmp(optarg, "e") == 0)
1121 timestamp_set_type(TS_EPOCH);
1123 cmdarg_err("Invalid time stamp type \"%s\"",
1125 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1126 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1130 case 'T': /* printing Type */
1131 if (strcmp(optarg, "text") == 0) {
1132 output_action = WRITE_TEXT;
1133 print_format = PR_FMT_TEXT;
1134 } else if (strcmp(optarg, "ps") == 0) {
1135 output_action = WRITE_TEXT;
1136 print_format = PR_FMT_PS;
1137 } else if (strcmp(optarg, "pdml") == 0) {
1138 output_action = WRITE_XML;
1140 } else if (strcmp(optarg, "psml") == 0) {
1141 output_action = WRITE_XML;
1143 } else if(strcmp(optarg, "fields") == 0) {
1144 output_action = WRITE_FIELDS;
1145 verbose = TRUE; /* Need full tree info */
1147 cmdarg_err("Invalid -T parameter.");
1148 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1152 case 'v': /* Show version and exit */
1153 printf("TShark " VERSION "%s\n"
1160 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
1161 runtime_info_str->str);
1164 case 'V': /* Verbose */
1167 case 'x': /* Print packet data in hex (and ASCII) */
1173 /* We won't call the init function for the stat this soon
1174 as it would disallow MATE's fields (which are registered
1175 by the preferences set callback) from being used as
1176 part of a tap filter. Instead, we just add the argument
1177 to a list of stat arguments. */
1178 if (!process_stat_cmd_arg(optarg)) {
1179 cmdarg_err("invalid -z argument.");
1180 cmdarg_err_cont(" -z argument must be one of :");
1181 list_stat_cmd_args();
1186 case '?': /* Bad flag - print usage message */
1189 list_capture_types();
1199 /* If we specified output fields, but not the output field type... */
1200 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1201 cmdarg_err("Output fields were specified with \"-e\", "
1202 "but \"-Tfields\" was not specified.");
1204 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1205 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1206 "specified with \"-e\".");
1211 /* If no capture filter or read filter has been specified, and there are
1212 still command-line arguments, treat them as the tokens of a capture
1213 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1214 flag was specified. */
1215 if (optind < argc) {
1216 if (cf_name != NULL) {
1217 if (rfilter != NULL) {
1218 cmdarg_err("Read filters were specified both with \"-R\" "
1219 "and with additional command-line arguments");
1222 rfilter = get_args_as_string(argc, argv, optind);
1225 if (global_capture_opts.has_cfilter) {
1226 cmdarg_err("Capture filters were specified both with \"-f\""
1227 " and with additional command-line arguments");
1230 global_capture_opts.has_cfilter = TRUE;
1231 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1233 capture_option_specified = TRUE;
1239 if (!global_capture_opts.saving_to_file) {
1240 /* We're not saving the capture to a file; if "-q" wasn't specified,
1241 we should print packet information */
1243 print_packet_info = TRUE;
1245 /* We're saving to a file; if we're writing to the standard output.
1246 and we'll also be writing dissected packets to the standard
1247 output, reject the request. At best, we could redirect that
1248 to the standard error; we *can't* write both to the standard
1249 output and have either of them be useful. */
1250 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1251 cmdarg_err("You can't write both raw packet data and dissected packets"
1252 " to the standard output.");
1257 /* We're not saving the capture to a file; if "-q" wasn't specified,
1258 we should print packet information */
1260 print_packet_info = TRUE;
1263 #ifndef HAVE_LIBPCAP
1264 if (capture_option_specified)
1265 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1272 /* We don't support capture filters when reading from a capture file
1273 (the BPF compiler doesn't support all link-layer types that we
1274 support in capture files we read). */
1276 if (cf_name != NULL) {
1277 if (global_capture_opts.has_cfilter) {
1278 cmdarg_err("Only read filters, not capture filters, "
1279 "can be specified when reading a capture file.");
1286 if (output_action != WRITE_TEXT) {
1287 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1293 if (list_link_layer_types) {
1294 /* We're supposed to list the link-layer types for an interface;
1295 did the user also specify a capture file to be read? */
1297 /* Yes - that's bogus. */
1298 cmdarg_err("You can't specify -L and a capture file to be read.");
1301 /* No - did they specify a ring buffer option? */
1302 if (global_capture_opts.multi_files_on) {
1303 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1309 * "-r" was specified, so we're reading a capture file.
1310 * Capture options don't apply here.
1312 if (global_capture_opts.multi_files_on) {
1313 cmdarg_err("Multiple capture files requested, but "
1314 "a capture isn't being done.");
1317 if (global_capture_opts.has_file_duration) {
1318 cmdarg_err("Switching capture files after a time interval was specified, but "
1319 "a capture isn't being done.");
1322 if (global_capture_opts.has_ring_num_files) {
1323 cmdarg_err("A ring buffer of capture files was specified, but "
1324 "a capture isn't being done.");
1327 if (global_capture_opts.has_autostop_files) {
1328 cmdarg_err("A maximum number of capture files was specified, but "
1329 "a capture isn't being done.");
1333 /* Note: TShark now allows the restriction of a _read_ file by packet count
1334 * and byte count as well as a write file. Other autostop options remain valid
1335 * only for a write file.
1337 if (global_capture_opts.has_autostop_duration) {
1338 cmdarg_err("A maximum capture time was specified, but "
1339 "a capture isn't being done.");
1344 * "-r" wasn't specified, so we're doing a live capture.
1346 if (global_capture_opts.saving_to_file) {
1347 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1349 /* When capturing, we only support writing libpcap format. */
1350 if (out_file_type != WTAP_FILE_PCAP) {
1351 cmdarg_err("Live captures can only be saved in libpcap format.");
1354 if (global_capture_opts.multi_files_on) {
1355 /* Multiple-file mode doesn't work under certain conditions:
1356 a) it doesn't work if you're writing to the standard output;
1357 b) it doesn't work if you're writing to a pipe;
1359 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1360 cmdarg_err("Multiple capture files requested, but "
1361 "the capture is being written to the standard output.");
1364 if (global_capture_opts.output_to_pipe) {
1365 cmdarg_err("Multiple capture files requested, but "
1366 "the capture file is a pipe.");
1369 if (!global_capture_opts.has_autostop_filesize &&
1370 !global_capture_opts.has_file_duration) {
1371 cmdarg_err("Multiple capture files requested, but "
1372 "no maximum capture file size or duration was specified.");
1377 /* They didn't specify a "-w" flag, so we won't be saving to a
1378 capture file. Check for options that only make sense if
1379 we're saving to a file. */
1380 if (global_capture_opts.has_autostop_filesize) {
1381 cmdarg_err("Maximum capture file size specified, but "
1382 "capture isn't being saved to a file.");
1385 if (global_capture_opts.multi_files_on) {
1386 cmdarg_err("Multiple capture files requested, but "
1387 "the capture isn't being saved to a file.");
1396 /* Start windows sockets */
1397 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1400 /* Notify all registered modules that have had any of their preferences
1401 changed either from one of the preferences file or from the command
1402 line that their preferences have changed. */
1405 /* At this point MATE will have registered its field array so we can
1406 have a tap filter with one of MATE's late-registered fields as part
1407 of the filter. We can now process all the "-z" arguments. */
1408 start_requested_stats();
1410 /* disabled protocols as per configuration file */
1411 if (gdp_path == NULL && dp_path == NULL) {
1412 set_disabled_protos_list();
1415 /* Build the column format array */
1416 col_setup(&cfile.cinfo, prefs->num_cols);
1417 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1418 cfile.cinfo.col_fmt[i] = get_column_format(i);
1419 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1420 if (cfile.cinfo.col_fmt[i] == COL_CUSTOM) {
1421 cfile.cinfo.col_custom_field[i] = g_strdup(get_column_custom_field(i));
1423 cfile.cinfo.col_custom_field[i] = NULL;
1425 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1427 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1428 cfile.cinfo.col_data[i] = NULL;
1429 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1430 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1432 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1433 cfile.cinfo.col_fence[i] = 0;
1434 cfile.cinfo.col_expr.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1435 cfile.cinfo.col_expr.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1438 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1441 for (j = 0; j < NUM_COL_FMTS; j++) {
1442 if (!cfile.cinfo.fmt_matx[i][j])
1445 if (cfile.cinfo.col_first[j] == -1)
1446 cfile.cinfo.col_first[j] = i;
1447 cfile.cinfo.col_last[j] = i;
1452 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1453 capture_opts_trim_ring_num_files(&global_capture_opts);
1456 if (rfilter != NULL) {
1457 if (!dfilter_compile(rfilter, &rfcode)) {
1458 cmdarg_err("%s", dfilter_error_msg);
1460 #ifdef HAVE_PCAP_OPEN_DEAD
1464 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1466 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1468 " Note: That display filter code looks like a valid capture filter;");
1470 " maybe you mixed them up?");
1479 cfile.rfcode = rfcode;
1481 if (print_packet_info) {
1482 /* If we're printing as text or PostScript, we have
1483 to create a print stream. */
1484 if (output_action == WRITE_TEXT) {
1485 switch (print_format) {
1488 print_stream = print_stream_text_stdio_new(stdout);
1492 print_stream = print_stream_ps_stdio_new(stdout);
1496 g_assert_not_reached();
1501 /* We have to dissect each packet if:
1503 we're printing information about each packet;
1505 we're using a read filter on the packets;
1507 we're using any taps. */
1508 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1512 * We're reading a capture file.
1516 * Immediately relinquish any special privileges we have; we must not
1517 * be allowed to read any capture files the user running TShark
1520 relinquish_special_privs_perm();
1521 print_current_user();
1523 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1528 /* Set timestamp precision; there should arguably be a command-line
1529 option to let the user set this. */
1530 switch(wtap_file_tsprecision(cfile.wth)) {
1531 case(WTAP_FILE_TSPREC_SEC):
1532 timestamp_set_precision(TS_PREC_AUTO_SEC);
1534 case(WTAP_FILE_TSPREC_DSEC):
1535 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1537 case(WTAP_FILE_TSPREC_CSEC):
1538 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1540 case(WTAP_FILE_TSPREC_MSEC):
1541 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1543 case(WTAP_FILE_TSPREC_USEC):
1544 timestamp_set_precision(TS_PREC_AUTO_USEC);
1546 case(WTAP_FILE_TSPREC_NSEC):
1547 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1550 g_assert_not_reached();
1553 /* Process the packets in the file */
1555 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1556 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1557 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1559 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1567 /* No capture file specified, so we're supposed to do a live capture
1568 (or get a list of link-layer types for a live capture device);
1569 do we have support for live captures? */
1576 cmdarg_err("WinPcap couldn't be found.");
1577 detailed_err = cant_load_winpcap_err("TShark");
1578 cmdarg_err_cont("%s", detailed_err);
1579 g_free(detailed_err);
1584 /* trim the interface name and exit if that failed */
1585 if (!capture_opts_trim_iface(&global_capture_opts,
1586 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1590 /* if requested, list the link layer types and exit */
1591 if (list_link_layer_types) {
1592 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1596 if (print_packet_info) {
1597 if (!write_preamble(NULL)) {
1599 show_print_file_io_error(err);
1602 } else if (!quiet) {
1604 * We're not printing information for each packet, and the user
1605 * didn't ask us not to print a count of packets as they arrive,
1606 * so print that count so the user knows that packets are arriving.
1608 * XXX - what if the user wants to do a live capture, doesn't want
1609 * to save it to a file, doesn't want information printed for each
1610 * packet, does want some "-z" statistic, and wants packet counts
1611 * so they know whether they're seeing any packets?
1613 print_packet_counts = TRUE;
1616 /* For now, assume libpcap gives microsecond precision. */
1617 timestamp_set_precision(TS_PREC_AUTO_USEC);
1621 if (print_packet_info) {
1622 if (!write_finale()) {
1624 show_print_file_io_error(err);
1628 /* No - complain. */
1629 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1634 draw_tap_listeners(TRUE);
1635 funnel_dump_all_text_windows();
1638 output_fields_free(output_fields);
1639 output_fields = NULL;
1644 /*#define USE_BROKEN_G_MAIN_LOOP*/
1646 #ifdef USE_BROKEN_G_MAIN_LOOP
1649 gboolean loop_running = FALSE;
1651 guint32 packet_count = 0;
1654 /* XXX - move to the right position / file */
1655 /* read from a pipe (callback) */
1656 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1658 typedef struct pipe_input_tag {
1662 pipe_input_cb_t input_cb;
1663 guint pipe_input_id;
1665 GStaticMutex callback_running;
1669 static pipe_input_t pipe_input;
1672 /* The timer has expired, see if there's stuff to read from the pipe,
1673 if so, do the callback */
1675 pipe_timer_cb(gpointer data)
1679 gboolean result, result1;
1681 pipe_input_t *pipe_input = data;
1682 gint iterations = 0;
1685 g_static_mutex_lock (&pipe_input->callback_running);
1687 /* try to read data from the pipe only 5 times, to avoid blocking */
1688 while(iterations < 5) {
1689 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1691 /* Oddly enough although Named pipes don't work on win9x,
1692 PeekNamedPipe does !!! */
1693 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1694 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1696 /* Get the child process exit status */
1697 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1700 /* If the Peek returned an error, or there are bytes to be read
1701 or the childwatcher thread has terminated then call the normal
1703 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1705 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1707 /* And call the real handler */
1708 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1709 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1710 /* pipe closed, return false so that the timer is stopped */
1711 g_static_mutex_unlock (&pipe_input->callback_running);
1716 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1717 /* No data, stop now */
1724 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1726 g_static_mutex_unlock (&pipe_input->callback_running);
1728 /* we didn't stopped the timer, so let it run */
1735 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1738 pipe_input.source = source;
1739 pipe_input.child_process = child_process;
1740 pipe_input.user_data = user_data;
1741 pipe_input.input_cb = input_cb;
1744 g_static_mutex_init(&pipe_input.callback_running);
1745 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1746 do this but that doesn't cover all win32 platforms. GTK can do
1747 this but doesn't seem to work over processes. Attempt to do
1748 something similar here, start a timer and check for data on every
1750 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1751 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1761 #ifdef USE_TSHARK_SELECT
1765 struct sigaction action, oldaction;
1769 * XXX - dropping privileges is still required, until code cleanup is done
1771 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1772 * when it's done, we don't need special privileges to run tshark at all,
1773 * therefore we don't need to drop these privileges
1774 * The only thing we might want to keep is a warning if tshark is run as root,
1775 * as it's no longer necessary and potentially dangerous.
1777 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1778 * We've opened the capture device, so we shouldn't need any special
1779 * privileges any more; relinquish those privileges.
1781 * XXX - if we have saved set-user-ID support, we should give up those
1782 * privileges immediately, and then reclaim them long enough to get
1783 * a list of network interfaces and to open one, and then give them
1784 * up again, so that stuff we do while processing the argument list,
1785 * reading the user's preferences, loading and starting plugins
1786 * (especially *user* plugins), etc. is done with the user's privileges,
1787 * not special privileges.
1789 relinquish_special_privs_perm();
1790 print_current_user();
1792 /* Initialize all data structures used for dissection. */
1796 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1797 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1799 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1801 action.sa_handler = capture_cleanup;
1802 action.sa_flags = 0;
1803 sigemptyset(&action.sa_mask);
1804 sigaction(SIGTERM, &action, NULL);
1805 sigaction(SIGINT, &action, NULL);
1806 sigaction(SIGHUP, NULL, &oldaction);
1807 if (oldaction.sa_handler == SIG_DFL)
1808 sigaction(SIGHUP, &action, NULL);
1811 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1812 quiet mode, report the number of packets we've captured. */
1813 action.sa_handler = report_counts_siginfo;
1814 action.sa_flags = 0;
1815 sigemptyset(&action.sa_mask);
1816 sigaction(SIGINFO, &action, NULL);
1817 #endif /* SIGINFO */
1820 global_capture_opts.state = CAPTURE_PREPARING;
1822 /* Let the user know what interface was chosen. */
1823 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1824 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1826 ret = sync_pipe_start(&global_capture_opts);
1831 /* the actual capture loop
1833 * XXX - glib doesn't seem to provide any event based loop handling.
1835 * XXX - for whatever reason,
1836 * calling g_main_loop_new() ends up in 100% cpu load.
1838 * But that doesn't matter: in UNIX we can use select() to find an input
1839 * source with something to do.
1841 * But that doesn't matter because we're in a CLI (that doesn't need to
1842 * update a GUI or something at the same time) so it's OK if we block
1843 * trying to read from the pipe.
1845 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1846 * wrong (but I leave it there in case I am...).
1849 #ifdef USE_TSHARK_SELECT
1851 FD_SET(pipe_input.source, &readfds);
1854 loop_running = TRUE;
1856 while (loop_running)
1858 #ifdef USE_TSHARK_SELECT
1859 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1865 } else if (ret == 1) {
1867 /* Call the real handler */
1868 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1869 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1872 #ifdef USE_TSHARK_SELECT
1881 /* XXX - move the call to main_window_update() out of capture_sync.c */
1882 /* dummy for capture_sync.c to make linker happy */
1883 void main_window_update(void)
1887 /* capture child detected an error */
1889 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1891 cmdarg_err("%s", error_msg);
1892 cmdarg_err_cont("%s", secondary_error_msg);
1896 /* capture child detected an capture filter related error */
1898 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1900 dfilter_t *rfcode = NULL;
1903 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1905 "Invalid capture filter: \"%s\"!\n"
1907 "That string looks like a valid display filter; however, it isn't a valid\n"
1908 "capture filter (%s).\n"
1910 "Note that display filters and capture filters don't have the same syntax,\n"
1911 "so you can't use most display filter expressions as capture filters.\n"
1913 "See the User's Guide for a description of the capture filter syntax.",
1914 capture_opts->cfilter, error_message);
1915 dfilter_free(rfcode);
1918 "Invalid capture filter: \"%s\"!\n"
1920 "That string isn't a valid capture filter (%s).\n"
1921 "See the User's Guide for a description of the capture filter syntax.",
1922 capture_opts->cfilter, error_message);
1927 /* capture child tells us we have a new (or the first) capture file */
1929 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1931 gboolean is_tempfile;
1935 if(capture_opts->state == CAPTURE_PREPARING) {
1936 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1938 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1940 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1942 /* free the old filename */
1943 if (capture_opts->save_file != NULL) {
1945 /* we start a new capture file, close the old one (if we had one before) */
1946 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1947 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1948 wtap_close(((capture_file *) capture_opts->cf)->wth);
1950 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1953 g_free(capture_opts->save_file);
1954 is_tempfile = FALSE;
1956 /* we didn't had a save_file before, must be a tempfile */
1960 /* save the new filename */
1961 capture_opts->save_file = g_strdup(new_file);
1963 /* if we are in real-time mode, open the new file now */
1965 /* Attempt to open the capture file and set up to read from it. */
1966 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1970 /* Don't unlink (delete) the save file - leave it around,
1971 for debugging purposes. */
1972 g_free(capture_opts->save_file);
1973 capture_opts->save_file = NULL;
1978 capture_opts->state = CAPTURE_RUNNING;
1984 /* capture child tells us we have new packets to read */
1986 capture_input_new_packets(capture_options *capture_opts, int to_read)
1992 capture_file *cf = capture_opts->cf;
1997 * Prevent a SIGINFO handler from writing to stdout while we're
1998 * doing so; instead, have it just set a flag telling us to print
1999 * that information when we're done.
2002 #endif /* SIGINFO */
2005 while (to_read-- && cf->wth) {
2006 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2008 /* read from file failed, tell the capture child to stop */
2009 sync_pipe_stop(capture_opts);
2010 wtap_close(cf->wth);
2013 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2014 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth));
2017 /* packet sucessfully read and gone through the "Read Filter" */
2023 * Dumpcap's doing all the work; we're not doing any dissection.
2024 * Count all the packets it wrote.
2026 packet_count += to_read;
2029 if (print_packet_counts) {
2030 /* We're printing packet counts. */
2031 if (packet_count != 0) {
2032 fprintf(stderr, "\r%u ", packet_count);
2033 /* stderr could be line buffered */
2040 * Allow SIGINFO handlers to write.
2045 * If a SIGINFO handler asked us to write out capture counts, do so.
2049 #endif /* SIGINFO */
2055 if (!print_packet_counts) {
2056 /* Report the count only if we aren't printing a packet count
2057 as packets arrive. */
2058 fprintf(stderr, "%u packet%s captured\n", packet_count,
2059 plurality(packet_count, "", "s"));
2062 infoprint = FALSE; /* we just reported it */
2063 #endif /* SIGINFO */
2068 report_counts_siginfo(int signum _U_)
2070 int sav_errno = errno;
2071 /* If we've been told to delay printing, just set a flag asking
2072 that we print counts (if we're supposed to), otherwise print
2073 the count of packets captured (if we're supposed to). */
2080 #endif /* SIGINFO */
2083 /* capture child detected any packet drops? */
2085 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2087 if (print_packet_counts) {
2088 /* We're printing packet counts to stderr.
2089 Send a newline so that we move to the line after the packet count. */
2090 fprintf(stderr, "\n");
2094 /* We're printing packet counts to stderr.
2095 Send a newline so that we move to the line after the packet count. */
2096 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2101 /* capture child closed its side of the pipe, do the required cleanup */
2103 capture_input_closed(capture_options *capture_opts)
2107 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2108 wtap_close(((capture_file *) capture_opts->cf)->wth);
2110 #ifdef USE_BROKEN_G_MAIN_LOOP
2111 /*g_main_loop_quit(loop);*/
2114 loop_running = FALSE;
2123 capture_cleanup(DWORD ctrltype _U_)
2125 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2126 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2127 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2128 like SIGTERM at least when the machine's shutting down.
2130 For now, we handle them all as indications that we should clean up
2131 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2134 However, as handlers run in a new thread, we can't just longjmp
2135 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2136 no other handler - such as one that would terminate the process -
2139 XXX - for some reason, typing ^C to TShark, if you run this in
2140 a Cygwin console window in at least some versions of Cygwin,
2141 causes TShark to terminate immediately; this routine gets
2142 called, but the main loop doesn't get a chance to run and
2143 exit cleanly, at least if this is compiled with Microsoft Visual
2144 C++ (i.e., it's a property of the Cygwin console window or Bash;
2145 it happens if TShark is not built with Cygwin - for all I know,
2146 building it with Cygwin may make the problem go away). */
2148 /* tell the capture child to stop */
2149 sync_pipe_stop(&global_capture_opts);
2151 /* don't stop our own loop already here, otherwise status messages and
2152 * cleanup wouldn't be done properly. The child will indicate the stop of
2153 * everything by calling capture_input_closed() later */
2159 capture_cleanup(int signum _U_)
2161 /* tell the capture child to stop */
2162 sync_pipe_stop(&global_capture_opts);
2165 #endif /* HAVE_LIBPCAP */
2168 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2169 int max_packet_count, gint64 max_byte_count)
2172 int snapshot_length;
2177 char *save_file_string = NULL;
2179 linktype = wtap_file_encap(cf->wth);
2180 if (save_file != NULL) {
2181 /* Get a string that describes what we're writing to */
2182 save_file_string = output_file_description(save_file);
2184 /* Set up to write to the capture file. */
2185 snapshot_length = wtap_snapshot_length(cf->wth);
2186 if (snapshot_length == 0) {
2187 /* Snapshot length of input file not known. */
2188 snapshot_length = WTAP_MAX_PACKET_SIZE;
2190 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2191 FALSE /* compressed */, &err);
2194 /* We couldn't set up to write to the capture file. */
2197 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2198 cmdarg_err("Capture files can't be written in that format.");
2201 case WTAP_ERR_UNSUPPORTED_ENCAP:
2202 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2203 cmdarg_err("The capture file being read can't be written in "
2207 case WTAP_ERR_CANT_OPEN:
2208 cmdarg_err("The %s couldn't be created for some "
2209 "unknown reason.", save_file_string);
2212 case WTAP_ERR_SHORT_WRITE:
2213 cmdarg_err("A full header couldn't be written to the %s.",
2218 cmdarg_err("The %s could not be created: %s.", save_file_string,
2219 wtap_strerror(err));
2225 if (print_packet_info) {
2226 if (!write_preamble(cf)) {
2228 show_print_file_io_error(err);
2234 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2235 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2236 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2237 /* Either there's no read filtering or this packet passed the
2238 filter, so, if we're writing to a capture file, write
2241 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2242 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2244 /* Error writing to a capture file */
2245 show_capture_file_io_error(save_file, err, FALSE);
2246 wtap_dump_close(pdh, &err);
2250 /* Stop reading if we have the maximum number of packets;
2251 * When the -c option has not been used, max_packet_count
2252 * starts at 0, which practically means, never stop reading.
2253 * (unless we roll over max_packet_count ?)
2255 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2256 err = 0; /* This is not an error */
2262 /* Print a message noting that the read failed somewhere along the line. */
2265 case WTAP_ERR_UNSUPPORTED_ENCAP:
2266 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2267 cf->filename, err_info);
2271 case WTAP_ERR_CANT_READ:
2272 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2276 case WTAP_ERR_SHORT_READ:
2277 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2281 case WTAP_ERR_BAD_RECORD:
2282 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2283 cf->filename, err_info);
2288 cmdarg_err("An error occurred while reading \"%s\": %s.",
2289 cf->filename, wtap_strerror(err));
2292 if (save_file != NULL) {
2293 /* Now close the capture file. */
2294 if (!wtap_dump_close(pdh, &err))
2295 show_capture_file_io_error(save_file, err, TRUE);
2298 if (save_file != NULL) {
2299 /* Now close the capture file. */
2300 if (!wtap_dump_close(pdh, &err))
2301 show_capture_file_io_error(save_file, err, TRUE);
2303 if (print_packet_info) {
2304 if (!write_finale()) {
2306 show_print_file_io_error(err);
2313 wtap_close(cf->wth);
2316 g_free(save_file_string);
2322 fill_in_fdata(frame_data *fdata, capture_file *cf,
2323 const struct wtap_pkthdr *phdr, gint64 offset)
2328 fdata->num = cf->count;
2329 fdata->pkt_len = phdr->len;
2330 cum_bytes += phdr->len;
2331 fdata->cum_bytes = cum_bytes;
2332 fdata->cap_len = phdr->caplen;
2333 fdata->file_off = offset;
2334 fdata->lnk_t = phdr->pkt_encap;
2335 fdata->abs_ts.secs = phdr->ts.secs;
2336 fdata->abs_ts.nsecs = phdr->ts.nsecs;
2337 fdata->flags.passed_dfilter = 0;
2338 fdata->flags.encoding = CHAR_ASCII;
2339 fdata->flags.visited = 0;
2340 fdata->flags.marked = 0;
2341 fdata->flags.ref_time = 0;
2342 fdata->color_filter = NULL;
2344 /* If we don't have the time stamp of the first packet in the
2345 capture, it's because this is the first packet. Save the time
2346 stamp of this packet as the time stamp of the first packet. */
2347 if (nstime_is_unset(&first_ts)) {
2348 first_ts = fdata->abs_ts;
2351 /* If we don't have the time stamp of the previous captured packet,
2352 it's because this is the first packet. Save the time
2353 stamp of this packet as the time stamp of the previous captured
2355 if (nstime_is_unset(&prev_cap_ts)) {
2356 prev_cap_ts = fdata->abs_ts;
2359 /* Get the time elapsed between the first packet and this packet. */
2360 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2362 /* If it's greater than the current elapsed time, set the elapsed time
2363 to it (we check for "greater than" so as not to be confused by
2364 time moving backwards). */
2365 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2366 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2367 cf->elapsed_time = fdata->rel_ts;
2370 /* If we don't have the time stamp of the previous displayed packet,
2371 it's because this is the first packet that's being displayed. Save the time
2372 stamp of this packet as the time stamp of the previous displayed
2374 if (nstime_is_unset(&prev_dis_ts))
2375 prev_dis_ts = fdata->abs_ts;
2377 /* Get the time elapsed between the previous displayed packet and
2379 nstime_delta(&fdata->del_dis_ts, &fdata->abs_ts, &prev_dis_ts);
2381 /* Get the time elapsed between the previous captured packet and
2383 nstime_delta(&fdata->del_cap_ts, &fdata->abs_ts, &prev_cap_ts);
2384 prev_cap_ts = fdata->abs_ts;
2387 /* Free up all data attached to a "frame_data" structure. */
2389 clear_fdata(frame_data *fdata)
2392 g_slist_free(fdata->pfd);
2396 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2397 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2400 gboolean create_proto_tree;
2401 epan_dissect_t *edt;
2404 /* Count this packet. */
2407 /* If we're going to print packet information, or we're going to
2408 run a read filter, or we're going to process taps, set up to
2409 do a dissection and do so. */
2410 if (do_dissection) {
2411 fill_in_fdata(&fdata, cf, whdr, offset);
2413 if (print_packet_info) {
2414 /* Grab any resolved addresses */
2416 if (g_resolv_flags) {
2417 host_name_lookup_process(NULL);
2422 if (cf->rfcode || verbose || num_tap_filters!=0 || have_custom_cols(&cf->cinfo))
2423 create_proto_tree = TRUE;
2425 create_proto_tree = FALSE;
2426 /* The protocol tree will be "visible", i.e., printed, only if we're
2427 printing packet details, which is true if we're printing stuff
2428 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2430 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2432 /* If we're running a read filter, prime the epan_dissect_t with that
2435 epan_dissect_prime_dfilter(edt, cf->rfcode);
2437 col_custom_prime_edt(edt, &cf->cinfo);
2439 tap_queue_init(edt);
2441 /* We only need the columns if we're printing packet info but we're
2442 *not* verbose; in verbose mode, we print the protocol tree, not
2443 the protocol summary. */
2444 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2445 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2447 tap_push_tapped_queue(edt);
2449 /* Run the read filter if we have one. */
2451 passed = dfilter_apply_edt(cf->rfcode, edt);
2455 /* We're not running a display filter and we're not printing any
2456 packet information, so we don't need to do a dissection, and all
2457 packets are processed. */
2463 /* Keep the time of the current packet if the packet passed
2464 the read filter so that the delta time since last displayed
2465 packet can be calculated */
2466 prev_dis_ts = fdata.abs_ts;
2468 /* Process this packet. */
2469 if (print_packet_info) {
2470 /* We're printing packet information; print the information for
2472 print_packet(cf, edt);
2474 /* The ANSI C standard does not appear to *require* that a line-buffered
2475 stream be flushed to the host environment whenever a newline is
2476 written, it just says that, on such a stream, characters "are
2477 intended to be transmitted to or from the host environment as a
2478 block when a new-line character is encountered".
2480 The Visual C++ 6.0 C implementation doesn't do what is intended;
2481 even if you set a stream to be line-buffered, it still doesn't
2482 flush the buffer at the end of every line.
2484 So, if the "-l" flag was specified, we flush the standard output
2485 at the end of a packet. This will do the right thing if we're
2486 printing packet summary lines, and, as we print the entire protocol
2487 tree for a single packet without waiting for anything to happen,
2488 it should be as good as line-buffered mode if we're printing
2489 protocol trees. (The whole reason for the "-l" flag in either
2490 tcpdump or TShark is to allow the output of a live capture to
2491 be piped to a program or script and to have that script see the
2492 information for the packet as soon as it's printed, rather than
2493 having to wait until a standard I/O buffer fills up. */
2497 if (ferror(stdout)) {
2498 show_print_file_io_error(errno);
2504 if (do_dissection) {
2505 epan_dissect_free(edt);
2506 clear_fdata(&fdata);
2512 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2514 char *save_file_string;
2516 save_file_string = output_file_description(fname);
2521 cmdarg_err("Not all the packets could be written to the %s because there is "
2522 "no space left on the file system.",
2528 cmdarg_err("Not all the packets could be written to the %s because you are "
2529 "too close to, or over your disk quota.",
2534 case WTAP_ERR_CANT_CLOSE:
2535 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2539 case WTAP_ERR_SHORT_WRITE:
2540 cmdarg_err("Not all the packets could be written to the %s.",
2546 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2547 wtap_strerror(err));
2549 cmdarg_err("An error occurred while writing to the %s: %s.",
2550 save_file_string, wtap_strerror(err));
2554 g_free(save_file_string);
2558 write_preamble(capture_file *cf)
2560 switch (output_action) {
2563 return print_preamble(print_stream, cf ? cf->filename : NULL);
2567 write_pdml_preamble(stdout);
2569 write_psml_preamble(stdout);
2570 return !ferror(stdout);
2573 write_fields_preamble(output_fields, stdout);
2574 return !ferror(stdout);
2577 g_assert_not_reached();
2583 get_line_buf(size_t len)
2585 static char *line_bufp = NULL;
2586 static size_t line_buf_len = 256;
2587 size_t new_line_buf_len;
2589 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2590 new_line_buf_len *= 2)
2592 if (line_bufp == NULL) {
2593 line_buf_len = new_line_buf_len;
2594 line_bufp = g_malloc(line_buf_len + 1);
2596 if (new_line_buf_len > line_buf_len) {
2597 line_buf_len = new_line_buf_len;
2598 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2605 print_columns(capture_file *cf)
2612 line_bufp = get_line_buf(256);
2615 for (i = 0; i < cf->cinfo.num_cols; i++) {
2616 switch (cf->cinfo.col_fmt[i]) {
2620 * Don't print this if we're doing a live capture from a network
2621 * interface - if we're doing a live capture, you won't be
2622 * able to look at the capture in the future (it's not being
2623 * saved anywhere), so the frame numbers are unlikely to be
2626 * (XXX - it might be nice to be able to save and print at
2627 * the same time, sort of like an "Update list of packets
2628 * in real time" capture in Wireshark.)
2630 if (global_capture_opts.iface != NULL)
2633 column_len = strlen(cf->cinfo.col_data[i]);
2636 line_bufp = get_line_buf(buf_offset + column_len);
2637 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2643 case COL_ABS_DATE_TIME: /* XXX - wider */
2644 column_len = strlen(cf->cinfo.col_data[i]);
2645 if (column_len < 10)
2647 line_bufp = get_line_buf(buf_offset + column_len);
2648 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2654 case COL_DEF_DL_SRC:
2655 case COL_RES_DL_SRC:
2656 case COL_UNRES_DL_SRC:
2657 case COL_DEF_NET_SRC:
2658 case COL_RES_NET_SRC:
2659 case COL_UNRES_NET_SRC:
2660 column_len = strlen(cf->cinfo.col_data[i]);
2661 if (column_len < 12)
2663 line_bufp = get_line_buf(buf_offset + column_len);
2664 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2670 case COL_DEF_DL_DST:
2671 case COL_RES_DL_DST:
2672 case COL_UNRES_DL_DST:
2673 case COL_DEF_NET_DST:
2674 case COL_RES_NET_DST:
2675 case COL_UNRES_NET_DST:
2676 column_len = strlen(cf->cinfo.col_data[i]);
2677 if (column_len < 12)
2679 line_bufp = get_line_buf(buf_offset + column_len);
2680 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2684 column_len = strlen(cf->cinfo.col_data[i]);
2685 line_bufp = get_line_buf(buf_offset + column_len);
2686 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2689 buf_offset += column_len;
2690 if (i != cf->cinfo.num_cols - 1) {
2692 * This isn't the last column, so we need to print a
2693 * separator between this column and the next.
2695 * If we printed a network source and are printing a
2696 * network destination of the same type next, separate
2697 * them with "->"; if we printed a network destination
2698 * and are printing a network source of the same type
2699 * next, separate them with "<-"; otherwise separate them
2702 * We add enough space to the buffer for " <- " or " -> ",
2703 * even if we're only adding " ".
2705 line_bufp = get_line_buf(buf_offset + 4);
2706 switch (cf->cinfo.col_fmt[i]) {
2711 switch (cf->cinfo.col_fmt[i + 1]) {
2716 strcat(line_bufp + buf_offset, " -> ");
2721 strcat(line_bufp + buf_offset, " ");
2727 case COL_DEF_DL_SRC:
2728 case COL_RES_DL_SRC:
2729 case COL_UNRES_DL_SRC:
2730 switch (cf->cinfo.col_fmt[i + 1]) {
2732 case COL_DEF_DL_DST:
2733 case COL_RES_DL_DST:
2734 case COL_UNRES_DL_DST:
2735 strcat(line_bufp + buf_offset, " -> ");
2740 strcat(line_bufp + buf_offset, " ");
2746 case COL_DEF_NET_SRC:
2747 case COL_RES_NET_SRC:
2748 case COL_UNRES_NET_SRC:
2749 switch (cf->cinfo.col_fmt[i + 1]) {
2751 case COL_DEF_NET_DST:
2752 case COL_RES_NET_DST:
2753 case COL_UNRES_NET_DST:
2754 strcat(line_bufp + buf_offset, " -> ");
2759 strcat(line_bufp + buf_offset, " ");
2768 switch (cf->cinfo.col_fmt[i + 1]) {
2773 strcat(line_bufp + buf_offset, " <- ");
2778 strcat(line_bufp + buf_offset, " ");
2784 case COL_DEF_DL_DST:
2785 case COL_RES_DL_DST:
2786 case COL_UNRES_DL_DST:
2787 switch (cf->cinfo.col_fmt[i + 1]) {
2789 case COL_DEF_DL_SRC:
2790 case COL_RES_DL_SRC:
2791 case COL_UNRES_DL_SRC:
2792 strcat(line_bufp + buf_offset, " <- ");
2797 strcat(line_bufp + buf_offset, " ");
2803 case COL_DEF_NET_DST:
2804 case COL_RES_NET_DST:
2805 case COL_UNRES_NET_DST:
2806 switch (cf->cinfo.col_fmt[i + 1]) {
2808 case COL_DEF_NET_SRC:
2809 case COL_RES_NET_SRC:
2810 case COL_UNRES_NET_SRC:
2811 strcat(line_bufp + buf_offset, " <- ");
2816 strcat(line_bufp + buf_offset, " ");
2823 strcat(line_bufp + buf_offset, " ");
2829 return print_line(print_stream, 0, line_bufp);
2833 print_packet(capture_file *cf, epan_dissect_t *edt)
2835 print_args_t print_args;
2838 /* Print the information in the protocol tree. */
2839 switch (output_action) {
2842 print_args.to_file = TRUE;
2843 print_args.format = print_format;
2844 print_args.print_summary = !verbose;
2845 print_args.print_hex = verbose && print_hex;
2846 print_args.print_formfeed = FALSE;
2847 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2849 /* init the packet range */
2850 packet_range_init(&print_args.range);
2852 if (!proto_tree_print(&print_args, edt, print_stream))
2855 /* "print_hex_data()" will put out a leading blank line, as well
2856 as a trailing one; print one here, to separate the packets,
2857 only if "print_hex_data()" won't be called. */
2858 if (!print_line(print_stream, 0, ""))
2864 proto_tree_write_pdml(edt, stdout);
2866 return !ferror(stdout);
2868 proto_tree_write_fields(output_fields, edt, stdout);
2870 return !ferror(stdout);
2873 /* Just fill in the columns. */
2874 epan_dissect_fill_in_columns(edt);
2876 /* Now print them. */
2877 switch (output_action) {
2880 if (!print_columns(cf))
2885 proto_tree_write_psml(edt, stdout);
2886 return !ferror(stdout);
2887 case WRITE_FIELDS: /*No non-verbose "fields" format */
2888 g_assert_not_reached();
2893 if (!print_hex_data(print_stream, edt))
2895 if (!print_line(print_stream, 0, ""))
2904 switch (output_action) {
2907 return print_finale(print_stream);
2911 write_pdml_finale(stdout);
2913 write_psml_finale(stdout);
2914 return !ferror(stdout);
2917 write_fields_finale(output_fields, stdout);
2918 return !ferror(stdout);
2921 g_assert_not_reached();
2927 show_print_file_io_error(int err)
2932 cmdarg_err("Not all the packets could be printed because there is "
2933 "no space left on the file system.");
2938 cmdarg_err("Not all the packets could be printed because you are "
2939 "too close to, or over your disk quota.");
2944 cmdarg_err("An error occurred while printing packets: %s.",
2951 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2955 static char errmsg_errno[1024+1];
2958 /* Wiretap error. */
2961 case WTAP_ERR_NOT_REGULAR_FILE:
2962 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2965 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2966 /* Seen only when opening a capture file for reading. */
2967 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2970 case WTAP_ERR_UNSUPPORTED:
2971 /* Seen only when opening a capture file for reading. */
2972 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2973 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2976 errmsg = errmsg_errno;
2979 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2980 /* Seen only when opening a capture file for writing. */
2981 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2982 "The file \"%%s\" is a pipe, and %s capture files can't be "
2983 "written to a pipe.", wtap_file_type_string(file_type));
2984 errmsg = errmsg_errno;
2987 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2988 /* Seen only when opening a capture file for writing. */
2989 errmsg = "TShark doesn't support writing capture files in that format.";
2992 case WTAP_ERR_UNSUPPORTED_ENCAP:
2994 errmsg = "TShark can't save this capture in that format.";
2996 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2997 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
3000 errmsg = errmsg_errno;
3004 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
3006 errmsg = "TShark can't save this capture in that format.";
3008 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3011 case WTAP_ERR_BAD_RECORD:
3012 /* Seen only when opening a capture file for reading. */
3013 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3014 "The file \"%%s\" appears to be damaged or corrupt.\n"
3017 errmsg = errmsg_errno;
3020 case WTAP_ERR_CANT_OPEN:
3022 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3024 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3027 case WTAP_ERR_SHORT_READ:
3028 errmsg = "The file \"%s\" appears to have been cut short"
3029 " in the middle of a packet or other data.";
3032 case WTAP_ERR_SHORT_WRITE:
3033 errmsg = "A full header couldn't be written to the file \"%s\".";
3037 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3038 "The file \"%%s\" could not be %s: %s.",
3039 for_writing ? "created" : "opened",
3040 wtap_strerror(err));
3041 errmsg = errmsg_errno;
3045 errmsg = file_open_error_message(err, for_writing);
3050 * Open/create errors are reported with an console message in TShark.
3053 open_failure_message(const char *filename, int err, gboolean for_writing)
3055 fprintf(stderr, "tshark: ");
3056 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3057 fprintf(stderr, "\n");
3061 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3065 char err_msg[2048+1];
3067 wth = wtap_open_offline(fname, err, &err_info, FALSE);
3071 /* The open succeeded. Fill in the information for this file. */
3073 /* Initialize all data structures used for dissection. */
3077 cf->f_datalen = 0; /* not used, but set it anyway */
3079 /* Set the file name because we need it to set the follow stream filter.
3080 XXX - is that still true? We need it for other reasons, though,
3082 cf->filename = g_strdup(fname);
3084 /* Indicate whether it's a permanent or temporary file. */
3085 cf->is_tempfile = is_tempfile;
3087 /* If it's a temporary capture buffer file, mark it as not saved. */
3088 cf->user_saved = !is_tempfile;
3090 cf->cd_t = wtap_file_type(cf->wth);
3092 cf->drops_known = FALSE;
3094 cf->snap = wtap_snapshot_length(cf->wth);
3095 if (cf->snap == 0) {
3096 /* Snapshot length not known. */
3097 cf->has_snap = FALSE;
3098 cf->snap = WTAP_MAX_PACKET_SIZE;
3100 cf->has_snap = TRUE;
3101 nstime_set_zero(&cf->elapsed_time);
3102 nstime_set_unset(&first_ts);
3103 nstime_set_unset(&prev_dis_ts);
3104 nstime_set_unset(&prev_cap_ts);
3106 cf->state = FILE_READ_IN_PROGRESS;
3111 g_snprintf(err_msg, sizeof err_msg,
3112 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3113 cmdarg_err("%s", err_msg);
3119 * General errors are reported with an console message in TShark.
3122 failure_message(const char *msg_format, va_list ap)
3124 fprintf(stderr, "tshark: ");
3125 vfprintf(stderr, msg_format, ap);
3126 fprintf(stderr, "\n");
3130 * Read errors are reported with an console message in TShark.
3133 read_failure_message(const char *filename, int err)
3135 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3136 filename, strerror(err));
3140 * Write errors are reported with an console message in TShark.
3143 write_failure_message(const char *filename, int err)
3145 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3146 filename, strerror(err));
3150 * Report an error in command-line arguments.
3153 cmdarg_err(const char *fmt, ...)
3158 failure_message(fmt, ap);
3163 * Report additional information for an error in command-line arguments.
3166 cmdarg_err_cont(const char *fmt, ...)
3171 vfprintf(stderr, fmt, ap);
3172 fprintf(stderr, "\n");