5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * Text-mode variant, by Gilbert Ramirez <gram@alumni.rice.edu>
10 * and Guy Harris <guy@alum.mit.edu>.
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 <epan/privileges.h>
66 #include <wiretap/file_util.h>
69 #include <epan/timestamp.h>
70 #include <epan/packet.h>
72 #include "disabled_protos.h"
73 #include <epan/prefs.h>
74 #include <epan/column.h>
76 #include <epan/addr_resolv.h>
78 #include "clopts_common.h"
79 #include "cmdarg_err.h"
80 #include "version_info.h"
81 #include <epan/conversation.h>
82 #include <epan/plugins.h>
84 #include "conditions.h"
85 #include "capture_stop_conditions.h"
86 #include "ringbuffer.h"
87 #include "capture_ui_utils.h"
88 #include <epan/epan_dissect.h>
90 #include <epan/stat_cmd_args.h>
91 #include <epan/timestamp.h>
92 #include <epan/ex-opt.h>
97 #include "capture-pcap-util.h"
99 #include <wiretap/wtap-capture.h>
101 #include "capture-wpcap.h"
102 #include "capture_errs.h"
105 #include "capture_loop.h"
106 #include "capture_sync.h"
107 #endif /* HAVE_LIBPCAP */
108 #include "epan/emem.h"
110 #include <epan/funnel.h>
113 * This is the template for the decode as option; it is shared between the
114 * various functions that output the usage for this parameter.
116 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
118 static nstime_t first_ts;
119 static nstime_t prev_ts;
120 static GString *comp_info_str, *runtime_info_str;
122 static gboolean print_packet_info; /* TRUE if we're to print packet information */
124 * The way the packet decode is to be written.
127 WRITE_TEXT, /* summary or detail text */
128 WRITE_XML /* PDML or PSML */
129 /* Add CSV and the like here */
131 static output_action_e output_action;
132 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
133 static gboolean verbose;
134 static gboolean print_hex;
135 static gboolean line_buffered;
136 static guint32 cum_bytes = 0;
137 static print_format_e print_format = PR_FMT_TEXT;
138 static print_stream_t *print_stream;
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;
156 static capture_options capture_opts;
160 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
161 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
163 #endif /* HAVE_LIBPCAP */
166 static int capture(void);
167 static void capture_pcap_cb(u_char *, const struct pcap_pkthdr *,
169 static void report_counts(void);
171 static BOOL WINAPI capture_cleanup(DWORD);
173 static void capture_cleanup(int);
175 static void report_counts_siginfo(int);
178 #endif /* HAVE_LIBPCAP */
180 static int load_cap_file(capture_file *, char *, int);
181 static gboolean process_packet(capture_file *cf, gint64 offset,
182 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
184 static void show_capture_file_io_error(const char *, int, gboolean);
185 static void show_print_file_io_error(int err);
186 static gboolean write_preamble(capture_file *cf);
187 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
188 static gboolean write_finale(void);
189 static const char *cf_open_error_message(int err, gchar *err_info,
190 gboolean for_writing, int file_type);
192 static void open_failure_message(const char *filename, int err,
193 gboolean for_writing);
194 static void failure_message(const char *msg_format, va_list ap);
195 static void read_failure_message(const char *filename, int err);
200 static void list_capture_types(void) {
203 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
204 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
205 if (wtap_dump_can_open(i))
206 fprintf(stderr, " %s - %s\n",
207 wtap_file_type_short_string(i), wtap_file_type_string(i));
212 print_usage(gboolean print_ver)
219 "TShark " VERSION "%s\n"
220 "Dump and analyze network traffic.\n"
221 "See http://www.wireshark.org for more information.\n"
224 svnversion, get_copyright_info());
228 fprintf(output, "\n");
229 fprintf(output, "Usage: tshark [options] ...\n");
230 fprintf(output, "\n");
233 fprintf(output, "Capture interface:\n");
234 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
235 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
236 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
237 fprintf(output, " -p don't capture in promiscuous mode\n");
239 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
241 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
242 fprintf(output, " -D print list of interfaces and exit\n");
243 fprintf(output, " -L print list of link-layer types of iface and exit\n");
244 fprintf(output, "\n");
245 fprintf(output, "Capture stop conditions:\n");
246 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
247 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
248 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
249 fprintf(output, " files:NUM - stop after NUM files\n");
250 /*fprintf(output, "\n");*/
251 fprintf(output, "Capture output:\n");
252 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
253 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
254 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
255 #endif /* HAVE_LIBPCAP */
257 /*fprintf(output, "\n");*/
258 fprintf(output, "Input file:\n");
259 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
261 fprintf(output, "\n");
262 fprintf(output, "Processing:\n");
263 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
264 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
265 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
266 fprintf(output, " -d %s ...\n", decode_as_arg_template);
267 fprintf(output, " \"Decode As\", see the man page for details\n");
268 fprintf(output, " Example: tcp.port==8888,http\n");
270 /*fprintf(output, "\n");*/
271 fprintf(output, "Output:\n");
272 fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\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 output format of text output (def: text)\n");
279 fprintf(output, " -t ad|a|r|d|e output format of time stamps (def: r: rel. to first)\n");
280 fprintf(output, " -l flush output after each packet\n");
281 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
282 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
283 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
285 fprintf(output, "\n");
286 fprintf(output, "Miscellaneous:\n");
287 fprintf(output, " -h display this help and exit\n");
288 fprintf(output, " -v display version info and exit\n");
289 fprintf(output, " -o <name>:<value> ... override preference setting\n");
293 * For a dissector table, print on the stream described by output,
294 * its short name (which is what's used in the "-d" option) and its
298 display_dissector_table_names(char *table_name, const char *ui_name,
301 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
305 * For a dissector handle, print on the stream described by output,
306 * the filter name (which is what's used in the "-d" option) and the full
307 * name for the protocol that corresponds to this handle.
310 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
313 const gchar* proto_filter_name;
314 const gchar* proto_ui_name;
316 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
318 if (proto_id != -1) {
319 proto_filter_name = proto_get_protocol_filter_name(proto_id);
320 proto_ui_name = proto_get_protocol_name(proto_id);
321 g_assert(proto_filter_name != NULL);
322 g_assert(proto_ui_name != NULL);
324 fprintf((FILE *)output, "\t%s (%s)\n",
331 * The protocol_name_search structure is used by find_protocol_name_func()
332 * to pass parameters and store results
334 struct protocol_name_search{
335 gchar *searched_name; /* Protocol filter name we are looking for */
336 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
337 guint nb_match; /* How many dissectors matched searched_name */
339 typedef struct protocol_name_search *protocol_name_search_t;
342 * This function parses all dissectors associated with a table to find the
343 * one whose protocol has the specified filter name. It is called
344 * as a reference function in a call to dissector_table_foreach_handle.
345 * The name we are looking for, as well as the results, are stored in the
346 * protocol_name_search struct pointed to by user_data.
347 * If called using dissector_table_foreach_handle, we actually parse the
348 * whole list of dissectors.
351 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
355 const gchar *protocol_filter_name;
356 protocol_name_search_t search_info;
360 search_info = (protocol_name_search_t)user_data;
362 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
363 if (proto_id != -1) {
364 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
365 g_assert(protocol_filter_name != NULL);
366 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
368 if (search_info->nb_match == 0) {
369 /* Record this handle only if this is the first match */
370 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
372 search_info->nb_match++;
378 * Print all layer type names supported.
379 * We send the output to the stream described by the handle output.
383 fprint_all_layer_types(FILE *output)
386 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
390 * Print all protocol names supported for a specific layer type.
391 * table_name contains the layer type name in which the search is performed.
392 * We send the output to the stream described by the handle output.
396 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
399 dissector_table_foreach_handle(table_name,
400 display_dissector_names,
405 * The function below parses the command-line parameters for the decode as
406 * feature (a string pointer by cl_param).
407 * It checks the format of the command-line, searches for a matching table
408 * and dissector. If a table/dissector match is not found, we display a
409 * summary of the available tables/dissectors (on stderr) and return FALSE.
410 * If everything is fine, we get the "Decode as" preference activated,
411 * then we return TRUE.
414 add_decode_as(const gchar *cl_param)
418 gchar *decoded_param;
419 gchar *remaining_param;
421 gchar *dissector_str;
422 dissector_handle_t dissector_matching;
423 dissector_table_t table_matching;
424 ftenum_t dissector_table_selector_type;
425 struct protocol_name_search user_protocol_name;
427 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
430 decoded_param = g_malloc( sizeof(gchar) * (strlen(cl_param) + 1) ); /* Allocate enough space to have a working copy of the command-line parameter */
431 g_assert(decoded_param);
432 strcpy(decoded_param, cl_param);
435 /* The lines below will parse this string (modifying it) to extract all
436 necessary information. Note that decoded_param is still needed since
437 strings are not copied - we just save pointers. */
439 /* This section extracts a layer type (table_name) from decoded_param */
440 table_name = decoded_param; /* Layer type string starts from beginning */
442 remaining_param = strchr(table_name, '=');
443 if (remaining_param == NULL) {
444 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
445 /* If the argument does not follow the template, carry on anyway to check
446 if the table name is at least correct. If remaining_param is NULL,
447 we'll exit anyway further down */
450 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
453 /* Remove leading and trailing spaces from the table name */
454 while ( table_name[0] == ' ' )
456 while ( table_name[strlen(table_name) - 1] == ' ' )
457 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
459 /* The following part searches a table matching with the layer type specified */
460 table_matching = NULL;
462 /* Look for the requested table */
463 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
464 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
467 table_matching = find_dissector_table(table_name);
468 if (!table_matching) {
469 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
473 if (!table_matching) {
474 /* Display a list of supported layer types to help the user, if the
475 specified layer type was not found */
476 cmdarg_err("Valid layer types are:");
477 fprint_all_layer_types(stderr);
479 if (remaining_param == NULL || !table_matching) {
480 /* Exit if the layer type was not found, or if no '=' separator was found
482 g_free(decoded_param);
486 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
487 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
490 remaining_param++; /* Move to the second '=' */
491 *remaining_param = '\0'; /* Remove the second '=' */
493 remaining_param++; /* Position after the layer type string */
495 /* This section extracts a selector value (selector_str) from decoded_param */
497 selector_str = remaining_param; /* Next part starts with the selector number */
499 remaining_param = strchr(selector_str, ',');
500 if (remaining_param == NULL) {
501 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
502 /* If the argument does not follow the template, carry on anyway to check
503 if the selector value is at least correct. If remaining_param is NULL,
504 we'll exit anyway further down */
507 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
510 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
512 switch (dissector_table_selector_type) {
518 /* The selector for this table is an unsigned number. Parse it as such.
519 There's no need to remove leading and trailing spaces from the
520 selector number string, because sscanf will do that for us. */
521 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
522 cmdarg_err("Invalid selector number \"%s\"", selector_str);
523 g_free(decoded_param);
530 /* The selector for this table is a string. */
534 /* There are currently no dissector tables with any types other
535 than the ones listed above. */
536 g_assert_not_reached();
539 if (remaining_param == NULL) {
540 /* Exit if no ',' separator was found (see above) */
541 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
542 fprint_all_protocols_for_layer_types(stderr, table_name);
543 g_free(decoded_param);
547 remaining_param++; /* Position after the selector number string */
549 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
551 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
553 /* Remove leading and trailing spaces from the dissector name */
554 while ( dissector_str[0] == ' ' )
556 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
557 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
559 dissector_matching = NULL;
561 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
562 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 */
563 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
566 user_protocol_name.nb_match = 0;
567 user_protocol_name.searched_name = dissector_str;
568 user_protocol_name.matched_handle = NULL;
570 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 */
572 if (user_protocol_name.nb_match != 0) {
573 dissector_matching = user_protocol_name.matched_handle;
574 if (user_protocol_name.nb_match > 1) {
575 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
579 /* OK, check whether the problem is that there isn't any such
580 protocol, or that there is but it's not specified as a protocol
581 that's valid for that dissector table.
582 Note, we don't exit here, but dissector_matching will remain NULL,
584 if (proto_get_id_by_filter_name(dissector_str) == -1) {
585 /* No such protocol */
586 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
588 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
589 dissector_str, table_name);
594 if (!dissector_matching) {
595 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
596 fprint_all_protocols_for_layer_types(stderr, table_name);
597 g_free(decoded_param);
601 /* This is the end of the code that parses the command-line options.
602 All information is now stored in the variables:
606 The above variables that are strings are still pointing to areas within
607 decoded_parm. decoded_parm thus still needs to be kept allocated in
608 until we stop needing these variables
609 decoded_param will be deallocated at each exit point of this function */
612 /* We now have a pointer to the handle for the requested dissector
613 (requested protocol) inside the variable dissector_matching */
614 switch (dissector_table_selector_type) {
620 /* The selector for this table is an unsigned number. */
621 dissector_change(table_name, selector, dissector_matching);
626 /* The selector for this table is a string. */
627 dissector_change_string(table_name, selector_str, dissector_matching);
631 /* There are currently no dissector tables with any types other
632 than the ones listed above. */
633 g_assert_not_reached();
635 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
640 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
641 const gchar *message _U_, gpointer user_data _U_)
646 output_file_description(const char *fname)
648 char *save_file_string;
650 /* Get a string that describes what we're writing to */
651 if (strcmp(fname, "-") == 0) {
652 /* We're writing to the standard output */
653 save_file_string = g_strdup("standard output");
655 /* We're writing to a file with the name in save_file */
656 save_file_string = g_strdup_printf("file \"%s\"", fname);
658 return save_file_string;
662 main(int argc, char *argv[])
664 char *init_progfile_dir_error;
667 gboolean arg_error = FALSE;
673 char *gpf_path, *pf_path;
674 char *gdp_path, *dp_path;
675 int gpf_open_errno, gpf_read_errno;
676 int pf_open_errno, pf_read_errno;
677 int gdp_open_errno, gdp_read_errno;
678 int dp_open_errno, dp_read_errno;
681 gboolean list_link_layer_types = FALSE;
682 gboolean start_capture = FALSE;
684 gboolean capture_option_specified = FALSE;
686 gboolean quiet = FALSE;
687 int out_file_type = WTAP_FILE_PCAP;
688 gchar *cf_name = NULL, *rfilter = NULL;
689 #ifdef HAVE_PCAP_OPEN_DEAD
690 struct bpf_program fcode;
692 dfilter_t *rfcode = NULL;
695 GLogLevelFlags log_flags;
698 #define OPTSTRING_INIT "a:b:c:d:Df:F:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
701 #define OPTSTRING_WIN32 "B:"
703 #define OPTSTRING_WIN32 ""
706 #define OPTSTRING_WIN32 ""
707 #endif /* HAVE_LIBPCAP */
709 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
712 * Attempt to get the pathname of the executable file.
714 init_progfile_dir_error = init_progfile_dir(argv[0]);
715 if (init_progfile_dir_error != NULL) {
716 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
717 init_progfile_dir_error);
721 * Get credential information for later use.
723 get_credential_info();
725 /* nothing more than the standard GLib handler, but without a warning */
728 G_LOG_LEVEL_CRITICAL|
733 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
735 g_log_set_handler(NULL,
737 log_func_ignore, NULL /* user_data */);
738 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
740 log_func_ignore, NULL /* user_data */);
742 initialize_funnel_ops();
745 capture_opts_init(&capture_opts, NULL /* cfile */);
748 timestamp_set_type(TS_RELATIVE);
749 timestamp_set_precision(TS_PREC_AUTO);
751 /* Register all dissectors; we must do this before checking for the
752 "-G" flag, as the "-G" flag dumps information registered by the
753 dissectors, and we must do it before we read the preferences, in
754 case any dissectors register preferences. */
755 epan_init(PLUGIN_DIR,register_all_protocols,register_all_protocol_handoffs,
756 failure_message,open_failure_message,read_failure_message);
758 /* Register all tap listeners; we do this before we parse the arguments,
759 as the "-z" argument can specify a registered tap. */
761 /* we register the plugin taps before the other taps because
762 stats_tree taps plugins will be registered as tap listeners
763 by stats_tree_stat.c and need to registered before that */
765 register_all_plugin_tap_listeners();
767 register_all_tap_listeners();
769 /* Now register the preferences for any non-dissector modules.
770 We must do that before we read the preferences as well. */
771 prefs_register_modules();
773 /* If invoked with the "-G" flag, we dump out information based on
774 the argument to the "-G" flag; if no argument is specified,
775 for backwards compatibility we dump out a glossary of display
778 XXX - we do this here, for now, to support "-G" with no arguments.
779 If none of our build or other processes uses "-G" with no arguments,
780 we can just process it with the other arguments. */
781 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
783 proto_registrar_dump_fields(1);
785 if (strcmp(argv[2], "fields") == 0)
786 proto_registrar_dump_fields(1);
787 else if (strcmp(argv[2], "fields2") == 0)
788 proto_registrar_dump_fields(2);
789 else if (strcmp(argv[2], "fields3") == 0)
790 proto_registrar_dump_fields(3);
791 else if (strcmp(argv[2], "protocols") == 0)
792 proto_registrar_dump_protocols();
793 else if (strcmp(argv[2], "values") == 0)
794 proto_registrar_dump_values();
795 else if (strcmp(argv[2], "decodes") == 0)
796 dissector_dump_decodes();
797 else if (strcmp(argv[2], "defaultprefs") == 0)
799 else if (strcmp(argv[2], "currentprefs") == 0) {
800 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
801 &pf_open_errno, &pf_read_errno, &pf_path);
804 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
811 /* Set the C-language locale to the native environment. */
812 setlocale(LC_ALL, "");
814 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
815 &pf_open_errno, &pf_read_errno, &pf_path);
816 if (gpf_path != NULL) {
817 if (gpf_open_errno != 0) {
818 cmdarg_err("Can't open global preferences file \"%s\": %s.",
819 pf_path, strerror(gpf_open_errno));
821 if (gpf_read_errno != 0) {
822 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
823 pf_path, strerror(gpf_read_errno));
826 if (pf_path != NULL) {
827 if (pf_open_errno != 0) {
828 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
829 strerror(pf_open_errno));
831 if (pf_read_errno != 0) {
832 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
833 pf_path, strerror(pf_read_errno));
839 /* Set the name resolution code's flags from the preferences. */
840 g_resolv_flags = prefs->name_resolve;
842 /* Read the disabled protocols file. */
843 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
844 &dp_path, &dp_open_errno, &dp_read_errno);
845 if (gdp_path != NULL) {
846 if (gdp_open_errno != 0) {
847 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
848 gdp_path, strerror(gdp_open_errno));
850 if (gdp_read_errno != 0) {
851 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
852 gdp_path, strerror(gdp_read_errno));
856 if (dp_path != NULL) {
857 if (dp_open_errno != 0) {
859 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
860 strerror(dp_open_errno));
862 if (dp_read_errno != 0) {
864 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
865 strerror(dp_read_errno));
871 /* Load Wpcap, if possible */
875 init_cap_file(&cfile);
877 /* Assemble the compile-time version information string */
878 comp_info_str = g_string_new("Compiled ");
879 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
881 /* Assemble the run-time version information string */
882 runtime_info_str = g_string_new("Running ");
883 get_runtime_version_info(runtime_info_str, NULL);
885 /* Print format defaults to this. */
886 print_format = PR_FMT_TEXT;
888 /* Now get our args */
889 while ((opt = getopt(argc, argv, optstring)) != -1) {
891 case 'a': /* autostop criteria */
892 case 'b': /* Ringbuffer option */
893 case 'c': /* Capture xxx packets */
894 case 'f': /* capture filter */
895 case 'i': /* Use interface xxx */
896 case 'p': /* Don't capture in promiscuous mode */
897 case 's': /* Set the snapshot (capture) length */
898 case 'w': /* Write to capture file xxx */
899 case 'y': /* Set the pcap data link type */
901 case 'B': /* Buffer size */
904 status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
909 capture_option_specified = TRUE;
913 case 'd': /* Decode as rule */
914 if (!add_decode_as(optarg))
917 case 'D': /* Print a list of capture devices and exit */
919 status = capture_opts_list_interfaces();
922 capture_option_specified = TRUE;
927 out_file_type = wtap_short_string_to_file_type(optarg);
928 if (out_file_type < 0) {
929 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
930 list_capture_types();
934 case 'h': /* Print help and exit */
938 case 'l': /* "Line-buffer" standard output */
939 /* This isn't line-buffering, strictly speaking, it's just
940 flushing the standard output after the information for
941 each packet is printed; however, that should be good
942 enough for all the purposes to which "-l" is put (and
943 is probably actually better for "-V", as it does fewer
946 See the comment in "process_packet()" for an explanation of
947 why we do that, and why we don't just use "setvbuf()" to
948 make the standard output line-buffered (short version: in
949 Windows, "line-buffered" is the same as "fully-buffered",
950 and the output buffer is only flushed when it fills up). */
951 line_buffered = TRUE;
953 case 'L': /* Print list of link-layer types and exit */
955 list_link_layer_types = TRUE;
958 capture_option_specified = TRUE;
962 case 'n': /* No name resolution */
963 g_resolv_flags = RESOLV_NONE;
965 case 'N': /* Select what types of addresses/port #s to resolve */
966 if (g_resolv_flags == RESOLV_ALL)
967 g_resolv_flags = RESOLV_NONE;
968 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
969 if (badopt != '\0') {
970 cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
975 case 'o': /* Override preference from command line */
976 switch (prefs_set_pref(optarg)) {
981 case PREFS_SET_SYNTAX_ERR:
982 cmdarg_err("Invalid -o flag \"%s\"", optarg);
986 case PREFS_SET_NO_SUCH_PREF:
987 case PREFS_SET_OBSOLETE:
988 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
993 case 'q': /* Quiet */
996 case 'r': /* Read capture file xxx */
997 cf_name = g_strdup(optarg);
999 case 'R': /* Read file filter */
1002 case 'S': /* show packets in real time */
1003 print_packet_info = TRUE;
1005 case 't': /* Time stamp type */
1006 if (strcmp(optarg, "r") == 0)
1007 timestamp_set_type(TS_RELATIVE);
1008 else if (strcmp(optarg, "a") == 0)
1009 timestamp_set_type(TS_ABSOLUTE);
1010 else if (strcmp(optarg, "ad") == 0)
1011 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1012 else if (strcmp(optarg, "d") == 0)
1013 timestamp_set_type(TS_DELTA);
1014 else if (strcmp(optarg, "e") == 0)
1015 timestamp_set_type(TS_EPOCH);
1017 cmdarg_err("Invalid time stamp type \"%s\"",
1019 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1020 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1024 case 'T': /* printing Type */
1025 if (strcmp(optarg, "text") == 0) {
1026 output_action = WRITE_TEXT;
1027 print_format = PR_FMT_TEXT;
1028 } else if (strcmp(optarg, "ps") == 0) {
1029 output_action = WRITE_TEXT;
1030 print_format = PR_FMT_PS;
1031 } else if (strcmp(optarg, "pdml") == 0) {
1032 output_action = WRITE_XML;
1034 } else if (strcmp(optarg, "psml") == 0) {
1035 output_action = WRITE_XML;
1038 cmdarg_err("Invalid -T parameter.");
1039 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", or \"psml\".");
1043 case 'v': /* Show version and exit */
1044 printf("TShark " VERSION "%s\n"
1051 svnversion, get_copyright_info(), comp_info_str->str,
1052 runtime_info_str->str);
1055 case 'V': /* Verbose */
1058 case 'x': /* Print packet data in hex (and ASCII) */
1065 /* We won't call the init function for the stat this soon
1066 as it would disallow MATE's fields (which are registered
1067 by the preferences set callback) from being used as
1068 part of a tap filter. Instead, we just add the argument
1069 to a list of stat arguments. */
1070 if (!process_stat_cmd_arg(optarg)) {
1071 cmdarg_err("invalid -z argument.");
1072 cmdarg_err_cont(" -z argument must be one of :");
1073 list_stat_cmd_args();
1078 case '?': /* Bad flag - print usage message */
1081 list_capture_types();
1091 /* If no capture filter or read filter has been specified, and there are
1092 still command-line arguments, treat them as the tokens of a capture
1093 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1094 flag was specified. */
1095 if (optind < argc) {
1096 if (cf_name != NULL) {
1097 if (rfilter != NULL) {
1098 cmdarg_err("Read filters were specified both with \"-R\" "
1099 "and with additional command-line arguments");
1102 rfilter = get_args_as_string(argc, argv, optind);
1105 if (capture_opts.has_cfilter) {
1106 cmdarg_err("Capture filters were specified both with \"-f\""
1107 " and with additional command-line arguments");
1110 capture_opts.has_cfilter = TRUE;
1111 capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1113 capture_option_specified = TRUE;
1118 if (!capture_opts.saving_to_file) {
1119 /* We're not saving the capture to a file; if "-q" wasn't specified,
1120 we should print packet information */
1122 print_packet_info = TRUE;
1124 /* We're saving to a file; if we're writing to the standard output.
1125 and we'll also be writing dissected packets to the standard
1126 output, reject the request. At best, we could redirect that
1127 to the standard error; we *can't* write both to the standard
1128 output and have either of them be useful. */
1129 if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
1130 cmdarg_err("You can't write both raw packet data and dissected packets"
1131 " to the standard output.");
1136 #ifndef HAVE_LIBPCAP
1137 if (capture_option_specified)
1138 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1145 /* We don't support capture filters when reading from a capture file
1146 (the BPF compiler doesn't support all link-layer types that we
1147 support in capture files we read). */
1149 if (cf_name != NULL) {
1150 if (capture_opts.has_cfilter) {
1151 cmdarg_err("Only read filters, not capture filters, "
1152 "can be specified when reading a capture file.");
1159 if (output_action != WRITE_TEXT) {
1160 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1166 if (list_link_layer_types) {
1167 /* We're supposed to list the link-layer types for an interface;
1168 did the user also specify a capture file to be read? */
1170 /* Yes - that's bogus. */
1171 cmdarg_err("You can't specify -L and a capture file to be read.");
1174 /* No - did they specify a ring buffer option? */
1175 if (capture_opts.multi_files_on) {
1176 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1180 /* If they didn't specify a "-w" flag, but specified a maximum capture
1181 file size, tell them that this doesn't work, and exit. */
1182 if (capture_opts.has_autostop_filesize && capture_opts.save_file == NULL) {
1183 cmdarg_err("Maximum capture file size specified, but "
1184 "capture isn't being saved to a file.");
1190 * "-r" was specified, so we're reading a capture file.
1191 * Capture options don't apply here.
1193 if (capture_opts.multi_files_on) {
1194 cmdarg_err("Multiple capture files requested, but "
1195 "a capture isn't being done.");
1198 if (capture_opts.has_file_duration) {
1199 cmdarg_err("Switching capture files after a time interval was specified, but "
1200 "a capture isn't being done.");
1203 if (capture_opts.has_ring_num_files) {
1204 cmdarg_err("A ring buffer of capture files was specified, but "
1205 "a capture isn't being done.");
1208 if (capture_opts.has_autostop_files) {
1209 cmdarg_err("A maximum number of capture files was specified, but "
1210 "a capture isn't being done.");
1213 if (capture_opts.has_autostop_packets) {
1214 cmdarg_err("A maximum number of captured packets was specified, but "
1215 "a capture isn't being done.");
1218 if (capture_opts.has_autostop_filesize) {
1219 cmdarg_err("A maximum capture file size was specified, but "
1220 "a capture isn't being done.");
1223 if (capture_opts.has_autostop_duration) {
1224 cmdarg_err("A maximum capture time was specified, but "
1225 "a capture isn't being done.");
1230 * "-r" wasn't specified, so we're doing a live capture.
1232 if (capture_opts.saving_to_file) {
1233 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1235 /* When capturing, we only support writing libpcap format. */
1236 if (out_file_type != WTAP_FILE_PCAP) {
1237 cmdarg_err("Live captures can only be saved in libpcap format.");
1240 if (capture_opts.multi_files_on) {
1241 /* Multiple-file mode works only under certain conditions:
1242 a) it doesn't work if you're writing to the standard output;
1243 b) it doesn't work if you're writing to a pipe;
1244 c) it makes no sense if the maximum file size is set to "infinite"
1245 (XXX - shouldn't that be "if there is no stop criterion",
1246 as you might want to switch files based on a packet count
1248 if (strcmp(capture_opts.save_file, "-") == 0) {
1249 cmdarg_err("Multiple capture files requested, but "
1250 "the capture is being written to the standard output.");
1253 if (capture_opts.output_to_pipe) {
1254 cmdarg_err("Multiple capture files requested, but "
1255 "the capture file is a pipe.");
1258 if (!capture_opts.has_autostop_filesize) {
1259 cmdarg_err("Multiple capture files requested, but "
1260 "no maximum capture file size was specified.");
1265 /* They didn't specify a "-w" flag, so we won't be saving to a
1266 capture file. Check for options that only make sense if
1267 we're saving to a file. */
1268 if (capture_opts.has_autostop_filesize) {
1269 cmdarg_err("Maximum capture file size specified, but "
1270 "capture isn't being saved to a file.");
1273 if (capture_opts.multi_files_on) {
1274 cmdarg_err("Multiple capture files requested, but "
1275 "the capture isn't being saved to a file.");
1284 /* Start windows sockets */
1285 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1288 /* Notify all registered modules that have had any of their preferences
1289 changed either from one of the preferences file or from the command
1290 line that their preferences have changed. */
1293 /* At this point MATE will have registered its field array so we can
1294 have a tap filter with one of MATE's late-registered fields as part
1295 of the filter. We can now process all the "-z" arguments. */
1296 start_requested_stats();
1298 /* disabled protocols as per configuration file */
1299 if (gdp_path == NULL && dp_path == NULL) {
1300 set_disabled_protos_list();
1303 /* Build the column format array */
1304 col_setup(&cfile.cinfo, prefs->num_cols);
1305 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1306 cfile.cinfo.col_fmt[i] = get_column_format(i);
1307 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1308 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1310 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1311 cfile.cinfo.col_data[i] = NULL;
1312 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1313 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1315 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1316 cfile.cinfo.col_fence[i] = 0;
1317 cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1318 cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1321 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1324 for (j = 0; j < NUM_COL_FMTS; j++) {
1325 if (!cfile.cinfo.fmt_matx[i][j])
1328 if (cfile.cinfo.col_first[j] == -1)
1329 cfile.cinfo.col_first[j] = i;
1330 cfile.cinfo.col_last[j] = i;
1335 capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
1336 capture_opts_trim_ring_num_files(&capture_opts);
1339 if (rfilter != NULL) {
1340 if (!dfilter_compile(rfilter, &rfcode)) {
1341 cmdarg_err("%s", dfilter_error_msg);
1343 #ifdef HAVE_PCAP_OPEN_DEAD
1347 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1349 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1351 " Note: That display filter code looks like a valid capture filter;");
1353 " maybe you mixed them up?");
1362 cfile.rfcode = rfcode;
1364 if (print_packet_info) {
1365 /* If we're printing as text or PostScript, we have
1366 to create a print stream. */
1367 if (output_action == WRITE_TEXT) {
1368 switch (print_format) {
1371 print_stream = print_stream_text_stdio_new(stdout);
1375 print_stream = print_stream_ps_stdio_new(stdout);
1379 g_assert_not_reached();
1384 /* We have to dissect each packet if:
1386 we're printing information about each packet;
1388 we're using a read filter on the packets;
1390 we're using any taps. */
1391 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1395 * We're reading a capture file.
1399 * Immediately relinquish any special privileges we have; we must not
1400 * be allowed to read any capture files the user running TShark
1403 relinquish_special_privs_perm();
1405 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1410 /* Set timestamp precision; there should arguably be a command-line
1411 option to let the user set this. */
1412 switch(wtap_file_tsprecision(cfile.wth)) {
1413 case(WTAP_FILE_TSPREC_SEC):
1414 timestamp_set_precision(TS_PREC_AUTO_SEC);
1416 case(WTAP_FILE_TSPREC_DSEC):
1417 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1419 case(WTAP_FILE_TSPREC_CSEC):
1420 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1422 case(WTAP_FILE_TSPREC_MSEC):
1423 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1425 case(WTAP_FILE_TSPREC_USEC):
1426 timestamp_set_precision(TS_PREC_AUTO_USEC);
1428 case(WTAP_FILE_TSPREC_NSEC):
1429 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1432 g_assert_not_reached();
1435 /* Process the packets in the file */
1436 err = load_cap_file(&cfile, capture_opts.save_file, out_file_type);
1443 /* No capture file specified, so we're supposed to do a live capture
1444 (or get a list of link-layer types for a live capture device);
1445 do we have support for live captures? */
1452 cmdarg_err("WinPcap couldn't be found.");
1453 detailed_err = cant_load_winpcap_err("TShark");
1454 cmdarg_err_cont("%s", detailed_err);
1455 g_free(detailed_err);
1460 /* trim the interface name and exit if that failed */
1461 if (!capture_opts_trim_iface(&capture_opts,
1462 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1466 /* if requested, list the link layer types and exit */
1467 if (list_link_layer_types) {
1468 status = capture_opts_list_link_layer_types(&capture_opts);
1472 if (!print_packet_info && !quiet) {
1474 * We're not printing information for each packet, and the user
1475 * didn't ask us not to print a count of packets as they arrive,
1476 * so print that count so the user knows that packets are arriving.
1478 * XXX - what if the user wants to do a live capture, doesn't want
1479 * to save it to a file, doesn't want information printed for each
1480 * packet, does want some "-z" statistic, and wants packet counts
1481 * so they know whether they're seeing any packets?
1483 print_packet_counts = TRUE;
1486 /* For now, assume libpcap gives microsecond precision. */
1487 timestamp_set_precision(TS_PREC_AUTO_USEC);
1491 if (capture_opts.multi_files_on) {
1495 /* No - complain. */
1496 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1501 draw_tap_listeners(TRUE);
1502 funnel_dump_all_text_windows();
1509 /* Do the low-level work of a capture.
1510 Returns TRUE if it succeeds, FALSE otherwise. */
1512 static condition *volatile cnd_file_duration = NULL; /* this must be visible in process_packet */
1518 int volatile volatile_err = 0;
1519 int volatile inpkts = 0;
1521 condition *volatile cnd_autostop_size = NULL;
1522 condition *volatile cnd_autostop_duration = NULL;
1525 void (*oldhandler)(int);
1527 struct pcap_stat stats;
1530 gboolean cfilter_error = FALSE;
1531 char errmsg[1024+1];
1532 char secondary_errmsg[4096+1];
1535 /* Initialize all data structures used for dissection. */
1538 ld.wtap_linktype = WTAP_ENCAP_UNKNOWN;
1540 ld.packet_cb = capture_pcap_cb;
1543 /* open the "input file" from network interface or capture pipe */
1544 if (!capture_loop_open_input(&capture_opts, &ld, errmsg, sizeof(errmsg),
1545 secondary_errmsg, sizeof(secondary_errmsg))) {
1550 * We've opened the capture device, so we shouldn't need any special
1551 * privileges any more; relinquish those privileges.
1553 * XXX - if we have saved set-user-ID support, we should give up those
1554 * privileges immediately, and then reclaim them long enough to get
1555 * a list of network interfaces and to open one, and then give them
1556 * up again, so that stuff we do while processing the argument list,
1557 * reading the user's preferences, loading and starting plugins
1558 * (especially *user* plugins), etc. is done with the user's privileges,
1559 * not special privileges.
1561 relinquish_special_privs_perm();
1563 /* init the input filter from the network interface (capture pipe will do nothing) */
1564 switch (capture_loop_init_filter(ld.pcap_h, ld.from_cap_pipe, capture_opts.iface, capture_opts.cfilter)) {
1566 case INITFILTER_NO_ERROR:
1569 case INITFILTER_BAD_FILTER:
1570 cfilter_error = TRUE;
1571 g_snprintf(errmsg, sizeof(errmsg), "%s", pcap_geterr(ld.pcap_h));
1572 *secondary_errmsg = '\0';
1575 case INITFILTER_OTHER_ERROR:
1576 g_snprintf(errmsg, sizeof(errmsg), "Can't install filter (%s).",
1577 pcap_geterr(ld.pcap_h));
1578 g_snprintf(secondary_errmsg, sizeof(secondary_errmsg), "%s", please_report);
1582 if (capture_opts.saving_to_file) {
1583 /* open the output file (temporary/specified name/ringbuffer/named pipe/stdout) */
1584 if (!capture_loop_open_output(&capture_opts, &save_file_fd, errmsg, sizeof(errmsg))) {
1585 *secondary_errmsg = '\0';
1589 /* set up to write to the already-opened capture output file/files */
1590 if(!capture_loop_init_output(&capture_opts, save_file_fd, &ld, errmsg, sizeof errmsg)) {
1591 *secondary_errmsg = '\0';
1595 /* Save the capture file name. */
1596 ld.save_file = capture_opts.save_file;
1599 ld.wtap_linktype = wtap_pcap_encap_to_wtap_encap(ld.linktype);
1602 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1603 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1605 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1607 XXX - deal with signal semantics on various UNIX platforms. Or just
1608 use "sigaction()" and be done with it? */
1609 signal(SIGTERM, capture_cleanup);
1610 signal(SIGINT, capture_cleanup);
1611 if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
1612 signal(SIGHUP, oldhandler);
1615 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1616 quiet mode, report the number of packets we've captured. */
1617 signal(SIGINFO, report_counts_siginfo);
1618 #endif /* SIGINFO */
1621 /* Let the user know what interface was chosen. */
1622 descr = get_interface_descriptive_name(capture_opts.iface);
1623 fprintf(stderr, "Capturing on %s\n", descr);
1626 /* initialize capture stop conditions */
1627 init_capture_stop_conditions();
1628 /* create stop conditions */
1629 if (capture_opts.has_autostop_filesize)
1630 cnd_autostop_size = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
1631 (long)capture_opts.autostop_filesize * 1024);
1632 if (capture_opts.has_autostop_duration)
1633 cnd_autostop_duration = cnd_new((const char*)CND_CLASS_TIMEOUT,
1634 (gint32)capture_opts.autostop_duration);
1636 if (capture_opts.multi_files_on && capture_opts.has_file_duration)
1637 cnd_file_duration = cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
1639 if (!setjmp(ld.stopenv)) {
1641 ld.packet_count = 0;
1646 /* We need to be careful with automatic variables defined in the
1647 outer scope which are changed inside the loop. Most compilers
1648 don't try to roll them back to their original values after the
1649 longjmp which causes the loop to finish, but all that the
1650 standards say is that their values are indeterminate. If we
1651 don't want them to be rolled back, we should define them with the
1652 volatile attribute (paraphrasing W. Richard Stevens, Advanced
1653 Programming in the UNIX Environment, p. 178).
1655 The "err" variable causes a particular problem. If we give it
1656 the volatile attribute, then when we pass a reference to it (as
1657 in "&err") to a function, GCC warns: "passing arg <n> of
1658 <function> discards qualifiers from pointer target type".
1659 Therefore within the loop and just beyond we don't use "err".
1660 Within the loop we define "loop_err", and assign its value to
1661 "volatile_err", which is in the outer scope and is checked when
1664 We also define "packet_count_prev" here to keep things tidy,
1665 since it's used only inside the loop. If it were defined in the
1666 outer scope, GCC would give a warning (unnecessary in this case)
1667 that it might be clobbered, and we'd need to give it the volatile
1668 attribute to suppress the warning. */
1671 int packet_count_prev = 0;
1673 if (cnd_autostop_size == NULL && cnd_autostop_duration == NULL) {
1674 /* We're not stopping at a particular capture file size, and we're
1675 not stopping after some particular amount of time has expired,
1676 so either we have no stop condition or the only stop condition
1677 is a maximum packet count.
1679 If there's no maximum packet count, pass it -1, meaning "until
1680 you run out of packets in the bufferful you read". Otherwise,
1681 pass it the number of packets we have left to capture.
1683 We don't call "pcap_loop()" as, if we're saving to a file that's
1684 a FIFO, we want to flush the FIFO after we're done processing
1685 this libpcap bufferful of packets, so that the program
1686 reading the FIFO sees the packets immediately and doesn't get
1687 any partial packet, forcing it to block in the middle of reading
1689 if (capture_opts.autostop_packets == 0)
1692 if (ld.packet_count >= capture_opts.autostop_packets) {
1693 /* XXX do we need this test here? */
1694 /* It appears there's nothing more to capture. */
1697 pcap_cnt = capture_opts.autostop_packets - ld.packet_count;
1700 /* We need to check the capture file size or the timeout after
1705 inpkts = capture_loop_dispatch(NULL, &ld, errmsg, sizeof errmsg);
1707 /* Error from "pcap_dispatch()", or error or "no more packets" from
1708 "cap_pipe_dispatch(). */
1710 } else if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
1711 /* The specified capture time has elapsed; stop the capture. */
1713 } else if (inpkts > 0) {
1714 if (capture_opts.autostop_packets != 0 &&
1715 ld.packet_count >= capture_opts.autostop_packets) {
1716 /* The specified number of packets have been captured and have
1717 passed both any capture filter in effect and any read filter
1720 } else if (cnd_autostop_size != NULL &&
1721 cnd_eval(cnd_autostop_size, (guint32)ld.bytes_written)) {
1722 /* We're saving the capture to a file, and the capture file reached
1723 its maximum size. */
1724 if (capture_opts.multi_files_on) {
1725 /* Switch to the next ringbuffer file */
1726 if (ringbuf_switch_file(&ld.pdh, &capture_opts.save_file,
1727 &save_file_fd, &ld.bytes_written,
1729 /* File switch succeeded: reset the condition */
1730 cnd_reset(cnd_autostop_size);
1731 if (cnd_file_duration) {
1732 cnd_reset(cnd_file_duration);
1735 /* File switch failed: stop here */
1736 volatile_err = loop_err;
1740 /* No ringbuffer - just stop. */
1744 if (capture_opts.output_to_pipe) {
1745 if (ld.packet_count > packet_count_prev) {
1746 libpcap_dump_flush(ld.pdh, NULL);
1747 packet_count_prev = ld.packet_count;
1751 } /* while (ld.go) */
1753 /* delete stop conditions */
1754 if (cnd_autostop_size != NULL)
1755 cnd_delete(cnd_autostop_size);
1756 if (cnd_autostop_duration != NULL)
1757 cnd_delete(cnd_autostop_duration);
1758 if (cnd_file_duration != NULL)
1759 cnd_delete(cnd_file_duration);
1761 if (print_packet_counts) {
1762 /* We're printing packet counts to stderr.
1763 Send a newline so that we move to the line after the packet count. */
1764 fprintf(stderr, "\n");
1767 /* If we got an error while capturing, report it. */
1769 if (ld.from_cap_pipe) {
1770 if (ld.cap_pipe_err == PIPERR) {
1771 cmdarg_err("Error while capturing packets: %s", errmsg);
1774 cmdarg_err("Error while capturing packets: %s", pcap_geterr(ld.pcap_h));
1778 if (volatile_err == 0)
1781 show_capture_file_io_error(capture_opts.save_file, volatile_err, FALSE);
1785 if (capture_opts.save_file != NULL) {
1786 /* We're saving to a file or files; close all files. */
1787 close_ok = capture_loop_close_output(&capture_opts, &ld, &err);
1789 /* If we've displayed a message about a write error, there's no point
1790 in displaying another message about an error on close. */
1791 if (!close_ok && write_ok)
1792 show_capture_file_io_error(capture_opts.save_file, err, TRUE);
1795 if (ld.from_cap_pipe && ld.cap_pipe_fd >= 0)
1796 eth_close(ld.cap_pipe_fd);
1798 /* Get the capture statistics, and, if any packets were dropped, report
1800 if (pcap_stats(ld.pcap_h, &stats) >= 0) {
1801 if (stats.ps_drop != 0) {
1802 fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
1805 cmdarg_err("Can't get packet-drop statistics: %s", pcap_geterr(ld.pcap_h));
1807 pcap_close(ld.pcap_h);
1810 /* Report the number of captured packets if not reported during capture
1811 and we are saving to a file. */
1817 if (capture_opts.multi_files_on) {
1818 ringbuf_error_cleanup();
1820 g_free(capture_opts.save_file);
1821 capture_opts.save_file = NULL;
1822 if (cfilter_error) {
1823 dfilter_t *rfcode = NULL;
1824 if (dfilter_compile(capture_opts.cfilter, &rfcode) && rfcode != NULL) {
1826 "Invalid capture filter: \"%s\"!\n"
1828 "That string looks like a valid display filter; however, it isn't a valid\n"
1829 "capture filter (%s).\n"
1831 "Note that display filters and capture filters don't have the same syntax,\n"
1832 "so you can't use most display filter expressions as capture filters.\n"
1834 "See the User's Guide for a description of the capture filter syntax.",
1835 capture_opts.cfilter, errmsg);
1836 dfilter_free(rfcode);
1839 "Invalid capture filter: \"%s\"!\n"
1841 "That string isn't a valid capture filter (%s).\n"
1842 "See the User's Guide for a description of the capture filter syntax.",
1843 capture_opts.cfilter, errmsg);
1846 cmdarg_err("%s", errmsg);
1847 if (*secondary_errmsg != '\0') {
1848 fprintf(stderr, "\n");
1849 cmdarg_err_cont("%s", secondary_errmsg);
1852 if (ld.from_cap_pipe) {
1853 if (ld.cap_pipe_fd >= 0)
1854 eth_close(ld.cap_pipe_fd);
1856 if (ld.pcap_h != NULL)
1857 pcap_close(ld.pcap_h);
1864 capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
1867 struct wtap_pkthdr whdr;
1868 union wtap_pseudo_header pseudo_header;
1869 const guchar *wtap_pd;
1870 loop_data *ld = (loop_data *) user;
1874 gboolean packet_accepted;
1878 * Prevent a SIGINFO handler from writing to stdout while we're
1879 * doing so; instead, have it just set a flag telling us to print
1880 * that information when we're done.
1883 #endif /* SIGINFO */
1885 /* The current packet may have arrived after a very long silence,
1886 * way past the time to switch files. In order not to have
1887 * the first packet of a new series of events as the last
1888 * [or only] packet in the file, switch before writing!
1890 if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
1891 /* time elapsed for this ring file, switch to the next */
1892 if (ringbuf_switch_file(&ld->pdh, &ld->save_file, &save_file_fd,
1893 &ld->bytes_written, &loop_err)) {
1894 /* File switch succeeded: reset the condition */
1895 cnd_reset(cnd_file_duration);
1897 /* File switch failed: stop here */
1898 /* XXX - we should do something with "loop_err" */
1903 if (do_dissection) {
1904 /* We're goint to print packet information, run a read filter, or
1905 process taps. Use process_packet() to handle that; in order
1906 to do that, we need to convert from libpcap to Wiretap format.
1907 If that fails, ignore the packet (wtap_process_pcap_packet has
1908 written an error message). */
1909 wtap_pd = wtap_process_pcap_packet(ld->wtap_linktype, phdr, pd,
1910 &pseudo_header, &whdr, &err);
1911 if (wtap_pd == NULL)
1914 packet_accepted = process_packet(&cfile, 0, &whdr, &pseudo_header, wtap_pd);
1916 /* We're just writing out packets. */
1917 packet_accepted = TRUE;
1920 if (packet_accepted) {
1921 /* Count this packet. */
1926 if (ld->pdh != NULL) {
1927 if (!libpcap_write_packet(ld->pdh, phdr, pd, &ld->bytes_written, &err)) {
1928 /* Error writing to a capture file */
1929 if (print_packet_counts) {
1930 /* We're printing counts of packets captured; move to the line after
1932 fprintf(stderr, "\n");
1934 show_capture_file_io_error(ld->save_file, err, FALSE);
1935 pcap_close(ld->pcap_h);
1936 libpcap_dump_close(ld->pdh, &err);
1940 if (print_packet_counts) {
1941 /* We're printing packet counts. */
1942 if (ld->packet_count != 0) {
1943 fprintf(stderr, "\r%u ", ld->packet_count);
1944 /* stderr could be line buffered */
1952 * Allow SIGINFO handlers to write.
1957 * If a SIGINFO handler asked us to write out capture counts, do so.
1961 #endif /* SIGINFO */
1966 capture_cleanup(DWORD ctrltype _U_)
1968 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
1969 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
1970 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
1971 like SIGTERM at least when the machine's shutting down.
1973 For now, we handle them all as indications that we should clean up
1974 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
1977 However, as handlers run in a new thread, we can't just longjmp
1978 out; we have to set "ld.go" to FALSE, and must return TRUE so that
1979 no other handler - such as one that would terminate the process -
1982 XXX - for some reason, typing ^C to TShark, if you run this in
1983 a Cygwin console window in at least some versions of Cygwin,
1984 causes TShark to terminate immediately; this routine gets
1985 called, but the main loop doesn't get a chance to run and
1986 exit cleanly, at least if this is compiled with Microsoft Visual
1987 C++ (i.e., it's a property of the Cygwin console window or Bash;
1988 it happens if TShark is not built with Cygwin - for all I know,
1989 building it with Cygwin may make the problem go away). */
1995 capture_cleanup(int signum _U_)
1997 /* Longjmp back to the starting point; "pcap_dispatch()", on many
1998 UNIX platforms, just keeps looping if it gets EINTR, so if we set
1999 "ld.go" to FALSE and return, we won't break out of it and quit
2001 longjmp(ld.stopenv, 1);
2009 /* XXX - if we use sigaction, this doesn't have to be done.
2010 (Yes, this isn't necessary on BSD, but just in case a system
2011 where "signal()" has AT&T semantics adopts SIGINFO....) */
2012 signal(SIGINFO, report_counts_siginfo);
2013 #endif /* SIGINFO */
2015 if (!print_packet_counts) {
2016 /* Report the count only if we aren't printing a packet count
2017 as packets arrive. */
2018 fprintf(stderr, "%u packets captured\n", ld.packet_count);
2021 infoprint = FALSE; /* we just reported it */
2022 #endif /* SIGINFO */
2027 report_counts_siginfo(int signum _U_)
2029 int sav_errno = errno;
2030 /* If we've been told to delay printing, just set a flag asking
2031 that we print counts (if we're supposed to), otherwise print
2032 the count of packets captured (if we're supposed to). */
2039 #endif /* SIGINFO */
2040 #endif /* HAVE_LIBPCAP */
2043 load_cap_file(capture_file *cf, char *save_file, int out_file_type)
2046 int snapshot_length;
2051 char *save_file_string = NULL;
2053 linktype = wtap_file_encap(cf->wth);
2054 if (save_file != NULL) {
2055 /* Get a string that describes what we're writing to */
2056 save_file_string = output_file_description(save_file);
2058 /* Set up to write to the capture file. */
2059 snapshot_length = wtap_snapshot_length(cf->wth);
2060 if (snapshot_length == 0) {
2061 /* Snapshot length of input file not known. */
2062 snapshot_length = WTAP_MAX_PACKET_SIZE;
2064 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2065 FALSE /* compressed */, &err);
2068 /* We couldn't set up to write to the capture file. */
2071 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2072 cmdarg_err("Capture files can't be written in that format.");
2075 case WTAP_ERR_UNSUPPORTED_ENCAP:
2076 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2077 cmdarg_err("The capture file being read can't be written in "
2081 case WTAP_ERR_CANT_OPEN:
2082 cmdarg_err("The %s couldn't be created for some "
2083 "unknown reason.", save_file_string);
2086 case WTAP_ERR_SHORT_WRITE:
2087 cmdarg_err("A full header couldn't be written to the %s.",
2092 cmdarg_err("The %s could not be created: %s.", save_file_string,
2093 wtap_strerror(err));
2099 if (print_packet_info) {
2100 if (!write_preamble(cf)) {
2102 show_print_file_io_error(err);
2108 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2109 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2110 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2111 /* Either there's no read filtering or this packet passed the
2112 filter, so, if we're writing to a capture file, write
2115 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2116 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2118 /* Error writing to a capture file */
2119 show_capture_file_io_error(save_file, err, FALSE);
2120 wtap_dump_close(pdh, &err);
2127 /* Print a message noting that the read failed somewhere along the line. */
2130 case WTAP_ERR_UNSUPPORTED_ENCAP:
2131 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2132 cf->filename, err_info);
2135 case WTAP_ERR_CANT_READ:
2136 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2140 case WTAP_ERR_SHORT_READ:
2141 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2145 case WTAP_ERR_BAD_RECORD:
2146 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2147 cf->filename, err_info);
2151 cmdarg_err("An error occurred while reading \"%s\": %s.",
2152 cf->filename, wtap_strerror(err));
2155 if (save_file != NULL) {
2156 /* Now close the capture file. */
2157 if (!wtap_dump_close(pdh, &err))
2158 show_capture_file_io_error(save_file, err, TRUE);
2161 if (save_file != NULL) {
2162 /* Now close the capture file. */
2163 if (!wtap_dump_close(pdh, &err))
2164 show_capture_file_io_error(save_file, err, TRUE);
2166 if (print_packet_info) {
2167 if (!write_finale()) {
2169 show_print_file_io_error(err);
2176 wtap_close(cf->wth);
2179 if (save_file_string != NULL)
2180 g_free(save_file_string);
2186 fill_in_fdata(frame_data *fdata, capture_file *cf,
2187 const struct wtap_pkthdr *phdr, gint64 offset)
2192 fdata->num = cf->count;
2193 fdata->pkt_len = phdr->len;
2194 cum_bytes += phdr->len;
2195 fdata->cum_bytes = cum_bytes;
2196 fdata->cap_len = phdr->caplen;
2197 fdata->file_off = offset;
2198 fdata->lnk_t = phdr->pkt_encap;
2199 fdata->abs_ts = *((nstime_t *) &phdr->ts);
2200 fdata->flags.passed_dfilter = 0;
2201 fdata->flags.encoding = CHAR_ASCII;
2202 fdata->flags.visited = 0;
2203 fdata->flags.marked = 0;
2204 fdata->flags.ref_time = 0;
2205 fdata->color_filter = NULL;
2207 /* If we don't have the time stamp of the first packet in the
2208 capture, it's because this is the first packet. Save the time
2209 stamp of this packet as the time stamp of the first packet. */
2210 if (nstime_is_zero(&first_ts)) {
2211 first_ts = fdata->abs_ts;
2214 /* If we don't have the time stamp of the previous displayed packet,
2215 it's because this is the first displayed packet. Save the time
2216 stamp of this packet as the time stamp of the previous displayed
2218 if (nstime_is_zero(&prev_ts)) {
2219 prev_ts = fdata->abs_ts;
2222 /* Get the time elapsed between the first packet and this packet. */
2223 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2225 /* If it's greater than the current elapsed time, set the elapsed time
2226 to it (we check for "greater than" so as not to be confused by
2227 time moving backwards). */
2228 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2229 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2230 cf->elapsed_time = fdata->rel_ts;
2233 /* Get the time elapsed between the previous displayed packet and
2235 nstime_delta(&fdata->del_ts, &fdata->abs_ts, &prev_ts);
2236 prev_ts = fdata->abs_ts;
2239 /* Free up all data attached to a "frame_data" structure. */
2241 clear_fdata(frame_data *fdata)
2244 g_slist_free(fdata->pfd);
2248 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2249 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2252 gboolean create_proto_tree;
2253 epan_dissect_t *edt;
2256 /* Count this packet. */
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) {
2263 fill_in_fdata(&fdata, cf, whdr, offset);
2265 if (print_packet_info) {
2266 /* Grab any resolved addresses */
2268 if (g_resolv_flags) {
2269 host_name_lookup_process(NULL);
2274 if (cf->rfcode || verbose || num_tap_filters!=0)
2275 create_proto_tree = TRUE;
2277 create_proto_tree = FALSE;
2278 /* The protocol tree will be "visible", i.e., printed, only if we're
2279 printing packet details, which is true if we're printing stuff
2280 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2282 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2284 /* If we're running a read filter, prime the epan_dissect_t with that
2287 epan_dissect_prime_dfilter(edt, cf->rfcode);
2289 tap_queue_init(edt);
2291 /* We only need the columns if we're printing packet info but we're
2292 *not* verbose; in verbose mode, we print the protocol tree, not
2293 the protocol summary. */
2294 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2295 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2297 tap_push_tapped_queue(edt);
2299 /* Run the read filter if we have one. */
2301 passed = dfilter_apply_edt(cf->rfcode, edt);
2305 /* We're not running a display filter and we're not printing any
2306 packet information, so we don't need to do a dissection, and all
2307 packets are processed. */
2313 /* Process this packet. */
2314 if (print_packet_info) {
2315 /* We're printing packet information; print the information for
2317 print_packet(cf, edt);
2319 /* The ANSI C standard does not appear to *require* that a line-buffered
2320 stream be flushed to the host environment whenever a newline is
2321 written, it just says that, on such a stream, characters "are
2322 intended to be transmitted to or from the host environment as a
2323 block when a new-line character is encountered".
2325 The Visual C++ 6.0 C implementation doesn't do what is intended;
2326 even if you set a stream to be line-buffered, it still doesn't
2327 flush the buffer at the end of every line.
2329 So, if the "-l" flag was specified, we flush the standard output
2330 at the end of a packet. This will do the right thing if we're
2331 printing packet summary lines, and, as we print the entire protocol
2332 tree for a single packet without waiting for anything to happen,
2333 it should be as good as line-buffered mode if we're printing
2334 protocol trees. (The whole reason for the "-l" flag in either
2335 tcpdump or TShark is to allow the output of a live capture to
2336 be piped to a program or script and to have that script see the
2337 information for the packet as soon as it's printed, rather than
2338 having to wait until a standard I/O buffer fills up. */
2342 if (ferror(stdout)) {
2343 show_print_file_io_error(errno);
2349 if (do_dissection) {
2350 epan_dissect_free(edt);
2351 clear_fdata(&fdata);
2357 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2359 char *save_file_string;
2361 save_file_string = output_file_description(fname);
2366 cmdarg_err("Not all the packets could be written to the %s because there is "
2367 "no space left on the file system.",
2373 cmdarg_err("Not all the packets could be written to the %s because you are "
2374 "too close to, or over your disk quota.",
2379 case WTAP_ERR_CANT_CLOSE:
2380 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2384 case WTAP_ERR_SHORT_WRITE:
2385 cmdarg_err("Not all the packets could be written to the %s.",
2391 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2392 wtap_strerror(err));
2394 cmdarg_err("An error occurred while writing to the %s: %s.",
2395 save_file_string, wtap_strerror(err));
2399 g_free(save_file_string);
2403 write_preamble(capture_file *cf)
2405 switch (output_action) {
2408 return print_preamble(print_stream, cf->filename);
2413 write_pdml_preamble(stdout);
2415 write_psml_preamble(stdout);
2416 return !ferror(stdout);
2419 g_assert_not_reached();
2425 get_line_buf(size_t len)
2427 static char *line_bufp = NULL;
2428 static size_t line_buf_len = 256;
2429 size_t new_line_buf_len;
2431 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2432 new_line_buf_len *= 2)
2434 if (line_bufp == NULL) {
2435 line_buf_len = new_line_buf_len;
2436 line_bufp = g_malloc(line_buf_len + 1);
2438 if (new_line_buf_len > line_buf_len) {
2439 line_buf_len = new_line_buf_len;
2440 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2447 print_columns(capture_file *cf)
2454 line_bufp = get_line_buf(256);
2457 for (i = 0; i < cf->cinfo.num_cols; i++) {
2458 switch (cf->cinfo.col_fmt[i]) {
2462 * Don't print this if we're doing a live capture from a network
2463 * interface - if we're doing a live capture, you won't be
2464 * able to look at the capture in the future (it's not being
2465 * saved anywhere), so the frame numbers are unlikely to be
2468 * (XXX - it might be nice to be able to save and print at
2469 * the same time, sort of like an "Update list of packets
2470 * in real time" capture in Wireshark.)
2472 if (capture_opts.iface != NULL)
2475 column_len = strlen(cf->cinfo.col_data[i]);
2478 line_bufp = get_line_buf(buf_offset + column_len);
2479 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2485 case COL_ABS_DATE_TIME: /* XXX - wider */
2486 column_len = strlen(cf->cinfo.col_data[i]);
2487 if (column_len < 10)
2489 line_bufp = get_line_buf(buf_offset + column_len);
2490 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2496 case COL_DEF_DL_SRC:
2497 case COL_RES_DL_SRC:
2498 case COL_UNRES_DL_SRC:
2499 case COL_DEF_NET_SRC:
2500 case COL_RES_NET_SRC:
2501 case COL_UNRES_NET_SRC:
2502 column_len = strlen(cf->cinfo.col_data[i]);
2503 if (column_len < 12)
2505 line_bufp = get_line_buf(buf_offset + column_len);
2506 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2512 case COL_DEF_DL_DST:
2513 case COL_RES_DL_DST:
2514 case COL_UNRES_DL_DST:
2515 case COL_DEF_NET_DST:
2516 case COL_RES_NET_DST:
2517 case COL_UNRES_NET_DST:
2518 column_len = strlen(cf->cinfo.col_data[i]);
2519 if (column_len < 12)
2521 line_bufp = get_line_buf(buf_offset + column_len);
2522 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2526 column_len = strlen(cf->cinfo.col_data[i]);
2527 line_bufp = get_line_buf(buf_offset + column_len);
2528 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2531 buf_offset += column_len;
2532 if (i != cf->cinfo.num_cols - 1) {
2534 * This isn't the last column, so we need to print a
2535 * separator between this column and the next.
2537 * If we printed a network source and are printing a
2538 * network destination of the same type next, separate
2539 * them with "->"; if we printed a network destination
2540 * and are printing a network source of the same type
2541 * next, separate them with "<-"; otherwise separate them
2544 * We add enough space to the buffer for " <- " or " -> ",
2545 * even if we're only adding " ".
2547 line_bufp = get_line_buf(buf_offset + 4);
2548 switch (cf->cinfo.col_fmt[i]) {
2553 switch (cf->cinfo.col_fmt[i + 1]) {
2558 strcat(line_bufp + buf_offset, " -> ");
2563 strcat(line_bufp + buf_offset, " ");
2569 case COL_DEF_DL_SRC:
2570 case COL_RES_DL_SRC:
2571 case COL_UNRES_DL_SRC:
2572 switch (cf->cinfo.col_fmt[i + 1]) {
2574 case COL_DEF_DL_DST:
2575 case COL_RES_DL_DST:
2576 case COL_UNRES_DL_DST:
2577 strcat(line_bufp + buf_offset, " -> ");
2582 strcat(line_bufp + buf_offset, " ");
2588 case COL_DEF_NET_SRC:
2589 case COL_RES_NET_SRC:
2590 case COL_UNRES_NET_SRC:
2591 switch (cf->cinfo.col_fmt[i + 1]) {
2593 case COL_DEF_NET_DST:
2594 case COL_RES_NET_DST:
2595 case COL_UNRES_NET_DST:
2596 strcat(line_bufp + buf_offset, " -> ");
2601 strcat(line_bufp + buf_offset, " ");
2610 switch (cf->cinfo.col_fmt[i + 1]) {
2615 strcat(line_bufp + buf_offset, " <- ");
2620 strcat(line_bufp + buf_offset, " ");
2626 case COL_DEF_DL_DST:
2627 case COL_RES_DL_DST:
2628 case COL_UNRES_DL_DST:
2629 switch (cf->cinfo.col_fmt[i + 1]) {
2631 case COL_DEF_DL_SRC:
2632 case COL_RES_DL_SRC:
2633 case COL_UNRES_DL_SRC:
2634 strcat(line_bufp + buf_offset, " <- ");
2639 strcat(line_bufp + buf_offset, " ");
2645 case COL_DEF_NET_DST:
2646 case COL_RES_NET_DST:
2647 case COL_UNRES_NET_DST:
2648 switch (cf->cinfo.col_fmt[i + 1]) {
2650 case COL_DEF_NET_SRC:
2651 case COL_RES_NET_SRC:
2652 case COL_UNRES_NET_SRC:
2653 strcat(line_bufp + buf_offset, " <- ");
2658 strcat(line_bufp + buf_offset, " ");
2665 strcat(line_bufp + buf_offset, " ");
2671 return print_line(print_stream, 0, line_bufp);
2675 print_packet(capture_file *cf, epan_dissect_t *edt)
2677 print_args_t print_args;
2680 /* Print the information in the protocol tree. */
2681 switch (output_action) {
2684 print_args.to_file = TRUE;
2685 print_args.format = print_format;
2686 print_args.print_summary = !verbose;
2687 print_args.print_hex = verbose && print_hex;
2688 print_args.print_formfeed = FALSE;
2689 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2691 /* init the packet range */
2692 packet_range_init(&print_args.range);
2694 if (!proto_tree_print(&print_args, edt, print_stream))
2697 /* "print_hex_data()" will put out a leading blank line, as well
2698 as a trailing one; print one here, to separate the packets,
2699 only if "print_hex_data()" won't be called. */
2700 if (!print_line(print_stream, 0, ""))
2706 proto_tree_write_pdml(edt, stdout);
2708 return !ferror(stdout);
2711 /* Just fill in the columns. */
2712 epan_dissect_fill_in_columns(edt);
2714 /* Now print them. */
2715 switch (output_action) {
2718 if (!print_columns(cf))
2723 proto_tree_write_psml(edt, stdout);
2724 return !ferror(stdout);
2728 if (!print_hex_data(print_stream, edt))
2730 if (!print_line(print_stream, 0, ""))
2739 switch (output_action) {
2742 return print_finale(print_stream);
2747 write_pdml_finale(stdout);
2749 write_psml_finale(stdout);
2750 return !ferror(stdout);
2753 g_assert_not_reached();
2759 show_print_file_io_error(int err)
2764 cmdarg_err("Not all the packets could be printed because there is "
2765 "no space left on the file system.");
2770 cmdarg_err("Not all the packets could be printed because you are "
2771 "too close to, or over your disk quota.");
2776 cmdarg_err("An error occurred while printing packets: %s.",
2783 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2787 static char errmsg_errno[1024+1];
2790 /* Wiretap error. */
2793 case WTAP_ERR_NOT_REGULAR_FILE:
2794 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2797 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2798 /* Seen only when opening a capture file for reading. */
2799 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2802 case WTAP_ERR_UNSUPPORTED:
2803 /* Seen only when opening a capture file for reading. */
2804 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2805 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2808 errmsg = errmsg_errno;
2811 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2812 /* Seen only when opening a capture file for writing. */
2813 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2814 "The file \"%%s\" is a pipe, and %s capture files can't be "
2815 "written to a pipe.", wtap_file_type_string(file_type));
2816 errmsg = errmsg_errno;
2819 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2820 /* Seen only when opening a capture file for writing. */
2821 errmsg = "TShark doesn't support writing capture files in that format.";
2824 case WTAP_ERR_UNSUPPORTED_ENCAP:
2826 errmsg = "TShark can't save this capture in that format.";
2828 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2829 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2832 errmsg = errmsg_errno;
2836 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2838 errmsg = "TShark can't save this capture in that format.";
2840 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
2843 case WTAP_ERR_BAD_RECORD:
2844 /* Seen only when opening a capture file for reading. */
2845 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2846 "The file \"%%s\" appears to be damaged or corrupt.\n"
2849 errmsg = errmsg_errno;
2852 case WTAP_ERR_CANT_OPEN:
2854 errmsg = "The file \"%s\" could not be created for some unknown reason.";
2856 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
2859 case WTAP_ERR_SHORT_READ:
2860 errmsg = "The file \"%s\" appears to have been cut short"
2861 " in the middle of a packet or other data.";
2864 case WTAP_ERR_SHORT_WRITE:
2865 errmsg = "A full header couldn't be written to the file \"%s\".";
2869 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2870 "The file \"%%s\" could not be %s: %s.",
2871 for_writing ? "created" : "opened",
2872 wtap_strerror(err));
2873 errmsg = errmsg_errno;
2877 errmsg = file_open_error_message(err, for_writing);
2882 * Open/create errors are reported with an console message in TShark.
2885 open_failure_message(const char *filename, int err, gboolean for_writing)
2887 fprintf(stderr, "tshark: ");
2888 fprintf(stderr, file_open_error_message(err, for_writing), filename);
2889 fprintf(stderr, "\n");
2893 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
2897 char err_msg[2048+1];
2899 wth = wtap_open_offline(fname, err, &err_info, FALSE);
2903 /* The open succeeded. Fill in the information for this file. */
2905 /* Initialize all data structures used for dissection. */
2909 cf->f_datalen = 0; /* not used, but set it anyway */
2911 /* Set the file name because we need it to set the follow stream filter.
2912 XXX - is that still true? We need it for other reasons, though,
2914 cf->filename = g_strdup(fname);
2916 /* Indicate whether it's a permanent or temporary file. */
2917 cf->is_tempfile = is_tempfile;
2919 /* If it's a temporary capture buffer file, mark it as not saved. */
2920 cf->user_saved = !is_tempfile;
2922 cf->cd_t = wtap_file_type(cf->wth);
2924 cf->drops_known = FALSE;
2926 cf->snap = wtap_snapshot_length(cf->wth);
2927 if (cf->snap == 0) {
2928 /* Snapshot length not known. */
2929 cf->has_snap = FALSE;
2930 cf->snap = WTAP_MAX_PACKET_SIZE;
2932 cf->has_snap = TRUE;
2933 nstime_set_zero(&cf->elapsed_time);
2934 nstime_set_zero(&first_ts);
2935 nstime_set_zero(&prev_ts);
2940 g_snprintf(err_msg, sizeof err_msg,
2941 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
2942 cmdarg_err("%s", err_msg);
2948 * General errors are reported with an console message in TShark.
2951 failure_message(const char *msg_format, va_list ap)
2953 fprintf(stderr, "tshark: ");
2954 vfprintf(stderr, msg_format, ap);
2955 fprintf(stderr, "\n");
2959 * Read errors are reported with an console message in TShark.
2962 read_failure_message(const char *filename, int err)
2964 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
2965 filename, strerror(err));
2969 * Report an error in command-line arguments.
2972 cmdarg_err(const char *fmt, ...)
2977 fprintf(stderr, "tshark: ");
2978 vfprintf(stderr, fmt, ap);
2979 fprintf(stderr, "\n");
2984 * Report additional information for an error in command-line arguments.
2987 cmdarg_err_cont(const char *fmt, ...)
2992 vfprintf(stderr, fmt, ap);
2993 fprintf(stderr, "\n");
2998 /****************************************************************************************************************/
2999 /* indication report "dummies", needed for capture_loop.c */
3003 /** Report a new capture file having been opened. */
3005 report_new_capture_file(const char *filename)
3007 /* shouldn't happen */
3008 g_assert_not_reached();
3011 /** Report a number of new packets captured. */
3013 report_packet_count(int packet_count)
3015 /* shouldn't happen */
3016 g_assert_not_reached();
3019 /** Report the packet drops once the capture finishes. */
3021 report_packet_drops(int drops)
3023 /* shouldn't happen */
3024 g_assert_not_reached();
3027 /** Report an error in the capture. */
3029 report_capture_error(const char *errmsg, const char *secondary_error_msg)
3032 cmdarg_err_cont(secondary_error_msg);
3035 /** Report an error with a capture filter. */
3037 report_cfilter_error(const char *cfilter, const char *errmsg)
3041 "Invalid capture filter: \"%s\"!\n"
3043 "That string isn't a valid capture filter (%s).\n"
3044 "See the User's Guide for a description of the capture filter syntax.",
3048 #endif /* HAVE_LIBPCAP */
3051 /****************************************************************************************************************/
3052 /* signal pipe "dummies", needed for capture_loop.c */
3058 signal_pipe_check_running(void)
3060 /* currently, no check required */
3065 #endif /* HAVE_LIBPCAP */