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, long 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, " -x add output of hex and ASCII dump (Packet Bytes)\n");
277 fprintf(output, " -T pdml|ps|psml|text output format of text output (def: text)\n");
278 fprintf(output, " -t ad|a|r|d output format of time stamps (def: r: rel. to first)\n");
279 fprintf(output, " -l flush output after each packet\n");
280 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
281 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
282 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
284 fprintf(output, "\n");
285 fprintf(output, "Miscellaneous:\n");
286 fprintf(output, " -h display this help and exit\n");
287 fprintf(output, " -v display version info and exit\n");
288 fprintf(output, " -o <name>:<value> ... override preference setting\n");
292 * For a dissector table, print on the stream described by output,
293 * its short name (which is what's used in the "-d" option) and its
297 display_dissector_table_names(char *table_name, const char *ui_name,
300 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
304 * For a dissector handle, print on the stream described by output,
305 * the filter name (which is what's used in the "-d" option) and the full
306 * name for the protocol that corresponds to this handle.
309 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
312 const gchar* proto_filter_name;
313 const gchar* proto_ui_name;
315 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
317 if (proto_id != -1) {
318 proto_filter_name = proto_get_protocol_filter_name(proto_id);
319 proto_ui_name = proto_get_protocol_name(proto_id);
320 g_assert(proto_filter_name != NULL);
321 g_assert(proto_ui_name != NULL);
323 fprintf((FILE *)output, "\t%s (%s)\n",
330 * The protocol_name_search structure is used by find_protocol_name_func()
331 * to pass parameters and store results
333 struct protocol_name_search{
334 gchar *searched_name; /* Protocol filter name we are looking for */
335 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
336 guint nb_match; /* How many dissectors matched searched_name */
338 typedef struct protocol_name_search *protocol_name_search_t;
341 * This function parses all dissectors associated with a table to find the
342 * one whose protocol has the specified filter name. It is called
343 * as a reference function in a call to dissector_table_foreach_handle.
344 * The name we are looking for, as well as the results, are stored in the
345 * protocol_name_search struct pointed to by user_data.
346 * If called using dissector_table_foreach_handle, we actually parse the
347 * whole list of dissectors.
350 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
354 const gchar *protocol_filter_name;
355 protocol_name_search_t search_info;
359 search_info = (protocol_name_search_t)user_data;
361 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
362 if (proto_id != -1) {
363 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
364 g_assert(protocol_filter_name != NULL);
365 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
367 if (search_info->nb_match == 0) {
368 /* Record this handle only if this is the first match */
369 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
371 search_info->nb_match++;
377 * Print all layer type names supported.
378 * We send the output to the stream described by the handle output.
382 fprint_all_layer_types(FILE *output)
385 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
389 * Print all protocol names supported for a specific layer type.
390 * table_name contains the layer type name in which the search is performed.
391 * We send the output to the stream described by the handle output.
395 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
398 dissector_table_foreach_handle(table_name,
399 display_dissector_names,
404 * The function below parses the command-line parameters for the decode as
405 * feature (a string pointer by cl_param).
406 * It checks the format of the command-line, searches for a matching table
407 * and dissector. If a table/dissector match is not found, we display a
408 * summary of the available tables/dissectors (on stderr) and return FALSE.
409 * If everything is fine, we get the "Decode as" preference activated,
410 * then we return TRUE.
413 add_decode_as(const gchar *cl_param)
417 gchar *decoded_param;
418 gchar *remaining_param;
420 gchar *dissector_str;
421 dissector_handle_t dissector_matching;
422 dissector_table_t table_matching;
423 ftenum_t dissector_table_selector_type;
424 struct protocol_name_search user_protocol_name;
426 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
429 decoded_param = g_malloc( sizeof(gchar) * (strlen(cl_param) + 1) ); /* Allocate enough space to have a working copy of the command-line parameter */
430 g_assert(decoded_param);
431 strcpy(decoded_param, cl_param);
434 /* The lines below will parse this string (modifying it) to extract all
435 necessary information. Note that decoded_param is still needed since
436 strings are not copied - we just save pointers. */
438 /* This section extracts a layer type (table_name) from decoded_param */
439 table_name = decoded_param; /* Layer type string starts from beginning */
441 remaining_param = strchr(table_name, '=');
442 if (remaining_param == NULL) {
443 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
444 /* If the argument does not follow the template, carry on anyway to check
445 if the table name is at least correct. If remaining_param is NULL,
446 we'll exit anyway further down */
449 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
452 /* Remove leading and trailing spaces from the table name */
453 while ( table_name[0] == ' ' )
455 while ( table_name[strlen(table_name) - 1] == ' ' )
456 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
458 /* The following part searches a table matching with the layer type specified */
459 table_matching = NULL;
461 /* Look for the requested table */
462 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
463 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
466 table_matching = find_dissector_table(table_name);
467 if (!table_matching) {
468 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
472 if (!table_matching) {
473 /* Display a list of supported layer types to help the user, if the
474 specified layer type was not found */
475 cmdarg_err("Valid layer types are:");
476 fprint_all_layer_types(stderr);
478 if (remaining_param == NULL || !table_matching) {
479 /* Exit if the layer type was not found, or if no '=' separator was found
481 g_free(decoded_param);
485 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
486 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
489 remaining_param++; /* Move to the second '=' */
490 *remaining_param = '\0'; /* Remove the second '=' */
492 remaining_param++; /* Position after the layer type string */
494 /* This section extracts a selector value (selector_str) from decoded_param */
496 selector_str = remaining_param; /* Next part starts with the selector number */
498 remaining_param = strchr(selector_str, ',');
499 if (remaining_param == NULL) {
500 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
501 /* If the argument does not follow the template, carry on anyway to check
502 if the selector value is at least correct. If remaining_param is NULL,
503 we'll exit anyway further down */
506 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
509 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
511 switch (dissector_table_selector_type) {
517 /* The selector for this table is an unsigned number. Parse it as such.
518 There's no need to remove leading and trailing spaces from the
519 selector number string, because sscanf will do that for us. */
520 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
521 cmdarg_err("Invalid selector number \"%s\"", selector_str);
522 g_free(decoded_param);
529 /* The selector for this table is a string. */
533 /* There are currently no dissector tables with any types other
534 than the ones listed above. */
535 g_assert_not_reached();
538 if (remaining_param == NULL) {
539 /* Exit if no ',' separator was found (see above) */
540 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
541 fprint_all_protocols_for_layer_types(stderr, table_name);
542 g_free(decoded_param);
546 remaining_param++; /* Position after the selector number string */
548 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
550 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
552 /* Remove leading and trailing spaces from the dissector name */
553 while ( dissector_str[0] == ' ' )
555 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
556 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
558 dissector_matching = NULL;
560 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
561 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 */
562 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
565 user_protocol_name.nb_match = 0;
566 user_protocol_name.searched_name = dissector_str;
567 user_protocol_name.matched_handle = NULL;
569 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 */
571 if (user_protocol_name.nb_match != 0) {
572 dissector_matching = user_protocol_name.matched_handle;
573 if (user_protocol_name.nb_match > 1) {
574 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
578 /* OK, check whether the problem is that there isn't any such
579 protocol, or that there is but it's not specified as a protocol
580 that's valid for that dissector table.
581 Note, we don't exit here, but dissector_matching will remain NULL,
583 if (proto_get_id_by_filter_name(dissector_str) == -1) {
584 /* No such protocol */
585 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
587 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
588 dissector_str, table_name);
593 if (!dissector_matching) {
594 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
595 fprint_all_protocols_for_layer_types(stderr, table_name);
596 g_free(decoded_param);
600 /* This is the end of the code that parses the command-line options.
601 All information is now stored in the variables:
605 The above variables that are strings are still pointing to areas within
606 decoded_parm. decoded_parm thus still needs to be kept allocated in
607 until we stop needing these variables
608 decoded_param will be deallocated at each exit point of this function */
611 /* We now have a pointer to the handle for the requested dissector
612 (requested protocol) inside the variable dissector_matching */
613 switch (dissector_table_selector_type) {
619 /* The selector for this table is an unsigned number. */
620 dissector_change(table_name, selector, dissector_matching);
625 /* The selector for this table is a string. */
626 dissector_change_string(table_name, selector_str, dissector_matching);
630 /* There are currently no dissector tables with any types other
631 than the ones listed above. */
632 g_assert_not_reached();
634 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
639 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
640 const gchar *message _U_, gpointer user_data _U_)
645 output_file_description(const char *fname)
647 char *save_file_string;
649 /* Get a string that describes what we're writing to */
650 if (strcmp(fname, "-") == 0) {
651 /* We're writing to the standard output */
652 save_file_string = g_strdup("standard output");
654 /* We're writing to a file with the name in save_file */
655 save_file_string = g_strdup_printf("file \"%s\"", fname);
657 return save_file_string;
661 main(int argc, char *argv[])
663 char *init_progfile_dir_error;
666 gboolean arg_error = FALSE;
672 char *gpf_path, *pf_path;
673 char *gdp_path, *dp_path;
674 int gpf_open_errno, gpf_read_errno;
675 int pf_open_errno, pf_read_errno;
676 int gdp_open_errno, gdp_read_errno;
677 int dp_open_errno, dp_read_errno;
680 gboolean list_link_layer_types = FALSE;
681 gboolean start_capture = FALSE;
683 gboolean capture_option_specified = FALSE;
685 gboolean quiet = FALSE;
686 int out_file_type = WTAP_FILE_PCAP;
687 gchar *cf_name = NULL, *rfilter = NULL;
688 #ifdef HAVE_PCAP_OPEN_DEAD
689 struct bpf_program fcode;
691 dfilter_t *rfcode = NULL;
694 GLogLevelFlags log_flags;
697 #define OPTSTRING_INIT "a:b:c:d:Df:F:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
700 #define OPTSTRING_WIN32 "B:"
702 #define OPTSTRING_WIN32 ""
705 #define OPTSTRING_WIN32 ""
706 #endif /* HAVE_LIBPCAP */
708 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
711 * Attempt to get the pathname of the executable file.
713 init_progfile_dir_error = init_progfile_dir(argv[0]);
714 if (init_progfile_dir_error != NULL) {
715 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
716 init_progfile_dir_error);
720 * Get credential information for later use.
722 get_credential_info();
724 /* nothing more than the standard GLib handler, but without a warning */
727 G_LOG_LEVEL_CRITICAL|
732 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
734 g_log_set_handler(NULL,
736 log_func_ignore, NULL /* user_data */);
737 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
739 log_func_ignore, NULL /* user_data */);
741 /* initialize memory allocation subsystem */
745 /* initialize the GUID to name mapping table */
748 initialize_funnel_ops();
751 capture_opts_init(&capture_opts, NULL /* cfile */);
754 timestamp_set_type(TS_RELATIVE);
755 timestamp_set_precision(TS_PREC_AUTO);
757 /* Register all dissectors; we must do this before checking for the
758 "-G" flag, as the "-G" flag dumps information registered by the
759 dissectors, and we must do it before we read the preferences, in
760 case any dissectors register preferences. */
761 epan_init(PLUGIN_DIR,register_all_protocols,register_all_protocol_handoffs,
762 failure_message,open_failure_message,read_failure_message);
764 /* Register all tap listeners; we do this before we parse the arguments,
765 as the "-z" argument can specify a registered tap. */
767 /* we register the plugin taps before the other taps because
768 stats_tree taps plugins will be registered as tap listeners
769 by stats_tree_stat.c and need to registered before that */
771 register_all_plugin_tap_listeners();
773 register_all_tap_listeners();
775 /* Now register the preferences for any non-dissector modules.
776 We must do that before we read the preferences as well. */
777 prefs_register_modules();
779 /* If invoked with the "-G" flag, we dump out information based on
780 the argument to the "-G" flag; if no argument is specified,
781 for backwards compatibility we dump out a glossary of display
784 XXX - we do this here, for now, to support "-G" with no arguments.
785 If none of our build or other processes uses "-G" with no arguments,
786 we can just process it with the other arguments. */
787 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
789 proto_registrar_dump_fields(1);
791 if (strcmp(argv[2], "fields") == 0)
792 proto_registrar_dump_fields(1);
793 else if (strcmp(argv[2], "fields2") == 0)
794 proto_registrar_dump_fields(2);
795 else if (strcmp(argv[2], "fields3") == 0)
796 proto_registrar_dump_fields(3);
797 else if (strcmp(argv[2], "protocols") == 0)
798 proto_registrar_dump_protocols();
799 else if (strcmp(argv[2], "values") == 0)
800 proto_registrar_dump_values();
801 else if (strcmp(argv[2], "decodes") == 0)
802 dissector_dump_decodes();
803 else if (strcmp(argv[2], "defaultprefs") == 0)
805 else if (strcmp(argv[2], "currentprefs") == 0) {
806 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
807 &pf_open_errno, &pf_read_errno, &pf_path);
810 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
817 /* Set the C-language locale to the native environment. */
818 setlocale(LC_ALL, "");
820 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
821 &pf_open_errno, &pf_read_errno, &pf_path);
822 if (gpf_path != NULL) {
823 if (gpf_open_errno != 0) {
824 cmdarg_err("Can't open global preferences file \"%s\": %s.",
825 pf_path, strerror(gpf_open_errno));
827 if (gpf_read_errno != 0) {
828 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
829 pf_path, strerror(gpf_read_errno));
832 if (pf_path != NULL) {
833 if (pf_open_errno != 0) {
834 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
835 strerror(pf_open_errno));
837 if (pf_read_errno != 0) {
838 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
839 pf_path, strerror(pf_read_errno));
845 /* Set the name resolution code's flags from the preferences. */
846 g_resolv_flags = prefs->name_resolve;
848 /* Read the disabled protocols file. */
849 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
850 &dp_path, &dp_open_errno, &dp_read_errno);
851 if (gdp_path != NULL) {
852 if (gdp_open_errno != 0) {
853 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
854 gdp_path, strerror(gdp_open_errno));
856 if (gdp_read_errno != 0) {
857 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
858 gdp_path, strerror(gdp_read_errno));
862 if (dp_path != NULL) {
863 if (dp_open_errno != 0) {
865 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
866 strerror(dp_open_errno));
868 if (dp_read_errno != 0) {
870 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
871 strerror(dp_read_errno));
877 /* Load Wpcap, if possible */
881 init_cap_file(&cfile);
883 /* Assemble the compile-time version information string */
884 comp_info_str = g_string_new("Compiled ");
885 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
887 /* Assemble the run-time version information string */
888 runtime_info_str = g_string_new("Running ");
889 get_runtime_version_info(runtime_info_str);
891 /* Print format defaults to this. */
892 print_format = PR_FMT_TEXT;
894 /* Now get our args */
895 while ((opt = getopt(argc, argv, optstring)) != -1) {
897 case 'a': /* autostop criteria */
898 case 'b': /* Ringbuffer option */
899 case 'c': /* Capture xxx packets */
900 case 'f': /* capture filter */
901 case 'i': /* Use interface xxx */
902 case 'p': /* Don't capture in promiscuous mode */
903 case 's': /* Set the snapshot (capture) length */
904 case 'w': /* Write to capture file xxx */
905 case 'y': /* Set the pcap data link type */
907 case 'B': /* Buffer size */
910 status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
915 capture_option_specified = TRUE;
919 case 'd': /* Decode as rule */
920 if (!add_decode_as(optarg))
923 case 'D': /* Print a list of capture devices and exit */
925 status = capture_opts_list_interfaces();
928 capture_option_specified = TRUE;
933 out_file_type = wtap_short_string_to_file_type(optarg);
934 if (out_file_type < 0) {
935 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
936 list_capture_types();
940 case 'h': /* Print help and exit */
944 case 'l': /* "Line-buffer" standard output */
945 /* This isn't line-buffering, strictly speaking, it's just
946 flushing the standard output after the information for
947 each packet is printed; however, that should be good
948 enough for all the purposes to which "-l" is put (and
949 is probably actually better for "-V", as it does fewer
952 See the comment in "process_packet()" for an explanation of
953 why we do that, and why we don't just use "setvbuf()" to
954 make the standard output line-buffered (short version: in
955 Windows, "line-buffered" is the same as "fully-buffered",
956 and the output buffer is only flushed when it fills up). */
957 line_buffered = TRUE;
959 case 'L': /* Print list of link-layer types and exit */
961 list_link_layer_types = TRUE;
964 capture_option_specified = TRUE;
968 case 'n': /* No name resolution */
969 g_resolv_flags = RESOLV_NONE;
971 case 'N': /* Select what types of addresses/port #s to resolve */
972 if (g_resolv_flags == RESOLV_ALL)
973 g_resolv_flags = RESOLV_NONE;
974 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
975 if (badopt != '\0') {
976 cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
981 case 'o': /* Override preference from command line */
982 switch (prefs_set_pref(optarg)) {
984 case PREFS_SET_SYNTAX_ERR:
985 cmdarg_err("Invalid -o flag \"%s\"", optarg);
989 case PREFS_SET_NO_SUCH_PREF:
990 case PREFS_SET_OBSOLETE:
991 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
996 case 'q': /* Quiet */
999 case 'r': /* Read capture file xxx */
1000 cf_name = g_strdup(optarg);
1002 case 'R': /* Read file filter */
1005 case 'S': /* show packets in real time */
1006 print_packet_info = TRUE;
1008 case 't': /* Time stamp type */
1009 if (strcmp(optarg, "r") == 0)
1010 timestamp_set_type(TS_RELATIVE);
1011 else if (strcmp(optarg, "a") == 0)
1012 timestamp_set_type(TS_ABSOLUTE);
1013 else if (strcmp(optarg, "ad") == 0)
1014 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1015 else if (strcmp(optarg, "d") == 0)
1016 timestamp_set_type(TS_DELTA);
1018 cmdarg_err("Invalid time stamp type \"%s\"",
1020 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1021 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1025 case 'T': /* printing Type */
1026 if (strcmp(optarg, "text") == 0) {
1027 output_action = WRITE_TEXT;
1028 print_format = PR_FMT_TEXT;
1029 } else if (strcmp(optarg, "ps") == 0) {
1030 output_action = WRITE_TEXT;
1031 print_format = PR_FMT_PS;
1032 } else if (strcmp(optarg, "pdml") == 0) {
1033 output_action = WRITE_XML;
1035 } else if (strcmp(optarg, "psml") == 0) {
1036 output_action = WRITE_XML;
1039 cmdarg_err("Invalid -T parameter.");
1040 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", or \"psml\".");
1044 case 'v': /* Show version and exit */
1045 printf("TShark " VERSION "%s\n"
1052 svnversion, get_copyright_info(), comp_info_str->str,
1053 runtime_info_str->str);
1056 case 'V': /* Verbose */
1059 case 'x': /* Print packet data in hex (and ASCII) */
1066 /* We won't call the init function for the stat this soon
1067 as it would disallow MATE's fields (which are registered
1068 by the preferences set callback) from being used as
1069 part of a tap filter. Instead, we just add the argument
1070 to a list of stat arguments. */
1071 if (!process_stat_cmd_arg(optarg)) {
1072 cmdarg_err("invalid -z argument.");
1073 cmdarg_err_cont(" -z argument must be one of :");
1074 list_stat_cmd_args();
1079 case '?': /* Bad flag - print usage message */
1082 list_capture_types();
1092 /* If no capture filter or read filter has been specified, and there are
1093 still command-line arguments, treat them as the tokens of a capture
1094 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1095 flag was specified. */
1096 if (optind < argc) {
1097 if (cf_name != NULL) {
1098 if (rfilter != NULL) {
1099 cmdarg_err("Read filters were specified both with \"-R\" "
1100 "and with additional command-line arguments");
1103 rfilter = get_args_as_string(argc, argv, optind);
1106 if (capture_opts.has_cfilter) {
1107 cmdarg_err("Capture filters were specified both with \"-f\""
1108 " and with additional command-line arguments");
1111 capture_opts.has_cfilter = TRUE;
1112 capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1114 capture_option_specified = TRUE;
1119 if (!capture_opts.saving_to_file) {
1120 /* We're not saving the capture to a file; if "-q" wasn't specified,
1121 we should print packet information */
1123 print_packet_info = TRUE;
1125 /* We're saving to a file; if we're writing to the standard output.
1126 and we'll also be writing dissected packets to the standard
1127 output, reject the request. At best, we could redirect that
1128 to the standard error; we *can't* write both to the standard
1129 output and have either of them be useful. */
1130 if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
1131 cmdarg_err("You can't write both raw packet data and dissected packets"
1132 " to the standard output.");
1137 #ifndef HAVE_LIBPCAP
1138 if (capture_option_specified)
1139 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1146 /* We don't support capture filters when reading from a capture file
1147 (the BPF compiler doesn't support all link-layer types that we
1148 support in capture files we read). */
1150 if (cf_name != NULL) {
1151 if (capture_opts.has_cfilter) {
1152 cmdarg_err("Only read filters, not capture filters, "
1153 "can be specified when reading a capture file.");
1160 if (output_action != WRITE_TEXT) {
1161 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1167 if (list_link_layer_types) {
1168 /* We're supposed to list the link-layer types for an interface;
1169 did the user also specify a capture file to be read? */
1171 /* Yes - that's bogus. */
1172 cmdarg_err("You can't specify -L and a capture file to be read.");
1175 /* No - did they specify a ring buffer option? */
1176 if (capture_opts.multi_files_on) {
1177 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1181 /* If they didn't specify a "-w" flag, but specified a maximum capture
1182 file size, tell them that this doesn't work, and exit. */
1183 if (capture_opts.has_autostop_filesize && capture_opts.save_file == NULL) {
1184 cmdarg_err("Maximum capture file size specified, but "
1185 "capture isn't being saved to a file.");
1191 * "-r" was specified, so we're reading a capture file.
1192 * Capture options don't apply here.
1194 if (capture_opts.multi_files_on) {
1195 cmdarg_err("Multiple capture files requested, but "
1196 "a capture isn't being done.");
1199 if (capture_opts.has_file_duration) {
1200 cmdarg_err("Switching capture files after a time interval was specified, but "
1201 "a capture isn't being done.");
1204 if (capture_opts.has_ring_num_files) {
1205 cmdarg_err("A ring buffer of capture files was specified, but "
1206 "a capture isn't being done.");
1209 if (capture_opts.has_autostop_files) {
1210 cmdarg_err("A maximum number of capture files was specified, but "
1211 "a capture isn't being done.");
1214 if (capture_opts.has_autostop_packets) {
1215 cmdarg_err("A maximum number of captured packets was specified, but "
1216 "a capture isn't being done.");
1219 if (capture_opts.has_autostop_filesize) {
1220 cmdarg_err("A maximum capture file size was specified, but "
1221 "a capture isn't being done.");
1224 if (capture_opts.has_autostop_duration) {
1225 cmdarg_err("A maximum capture time was specified, but "
1226 "a capture isn't being done.");
1231 * "-r" wasn't specified, so we're doing a live capture.
1233 if (capture_opts.saving_to_file) {
1234 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1236 /* When capturing, we only support writing libpcap format. */
1237 if (out_file_type != WTAP_FILE_PCAP) {
1238 cmdarg_err("Live captures can only be saved in libpcap format.");
1241 if (capture_opts.multi_files_on) {
1242 /* Multiple-file mode works only under certain conditions:
1243 a) it doesn't work if you're writing to the standard output;
1244 b) it doesn't work if you're writing to a pipe;
1245 c) it makes no sense if the maximum file size is set to "infinite"
1246 (XXX - shouldn't that be "if there is no stop criterion",
1247 as you might want to switch files based on a packet count
1249 if (strcmp(capture_opts.save_file, "-") == 0) {
1250 cmdarg_err("Multiple capture files requested, but "
1251 "the capture is being written to the standard output.");
1254 if (capture_opts.output_to_pipe) {
1255 cmdarg_err("Multiple capture files requested, but "
1256 "the capture file is a pipe.");
1259 if (!capture_opts.has_autostop_filesize) {
1260 cmdarg_err("Multiple capture files requested, but "
1261 "no maximum capture file size was specified.");
1266 /* They didn't specify a "-w" flag, so we won't be saving to a
1267 capture file. Check for options that only make sense if
1268 we're saving to a file. */
1269 if (capture_opts.has_autostop_filesize) {
1270 cmdarg_err("Maximum capture file size specified, but "
1271 "capture isn't being saved to a file.");
1274 if (capture_opts.multi_files_on) {
1275 cmdarg_err("Multiple capture files requested, but "
1276 "the capture isn't being saved to a file.");
1285 /* Start windows sockets */
1286 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1289 /* Notify all registered modules that have had any of their preferences
1290 changed either from one of the preferences file or from the command
1291 line that their preferences have changed. */
1294 /* At this point MATE will have registered its field array so we can
1295 have a tap filter with one of MATE's late-registered fields as part
1296 of the filter. We can now process all the "-z" arguments. */
1297 start_requested_stats();
1299 /* disabled protocols as per configuration file */
1300 if (gdp_path == NULL && dp_path == NULL) {
1301 set_disabled_protos_list();
1304 /* Build the column format array */
1305 col_setup(&cfile.cinfo, prefs->num_cols);
1306 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1307 cfile.cinfo.col_fmt[i] = get_column_format(i);
1308 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1309 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1311 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1312 cfile.cinfo.col_data[i] = NULL;
1313 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1314 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1316 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1317 cfile.cinfo.col_fence[i] = 0;
1318 cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1319 cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1322 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1325 for (j = 0; j < NUM_COL_FMTS; j++) {
1326 if (!cfile.cinfo.fmt_matx[i][j])
1329 if (cfile.cinfo.col_first[j] == -1)
1330 cfile.cinfo.col_first[j] = i;
1331 cfile.cinfo.col_last[j] = i;
1336 capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
1337 capture_opts_trim_ring_num_files(&capture_opts);
1340 if (rfilter != NULL) {
1341 if (!dfilter_compile(rfilter, &rfcode)) {
1342 cmdarg_err("%s", dfilter_error_msg);
1344 #ifdef HAVE_PCAP_OPEN_DEAD
1348 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1350 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1352 " Note: That display filter code looks like a valid capture filter;");
1354 " maybe you mixed them up?");
1363 cfile.rfcode = rfcode;
1365 if (print_packet_info) {
1366 /* If we're printing as text or PostScript, we have
1367 to create a print stream. */
1368 if (output_action == WRITE_TEXT) {
1369 switch (print_format) {
1372 print_stream = print_stream_text_stdio_new(stdout);
1376 print_stream = print_stream_ps_stdio_new(stdout);
1380 g_assert_not_reached();
1385 /* We have to dissect each packet if:
1387 we're printing information about each packet;
1389 we're using a read filter on the packets;
1391 we're using any taps. */
1392 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1396 * We're reading a capture file.
1400 * Immediately relinquish any special privileges we have; we must not
1401 * be allowed to read any capture files the user running TShark
1404 relinquish_special_privs_perm();
1406 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1411 /* Set timestamp precision; there should arguably be a command-line
1412 option to let the user set this. */
1413 switch(wtap_file_tsprecision(cfile.wth)) {
1414 case(WTAP_FILE_TSPREC_SEC):
1415 timestamp_set_precision(TS_PREC_AUTO_SEC);
1417 case(WTAP_FILE_TSPREC_DSEC):
1418 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1420 case(WTAP_FILE_TSPREC_CSEC):
1421 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1423 case(WTAP_FILE_TSPREC_MSEC):
1424 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1426 case(WTAP_FILE_TSPREC_USEC):
1427 timestamp_set_precision(TS_PREC_AUTO_USEC);
1429 case(WTAP_FILE_TSPREC_NSEC):
1430 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1433 g_assert_not_reached();
1436 /* Process the packets in the file */
1437 err = load_cap_file(&cfile, capture_opts.save_file, out_file_type);
1444 /* No capture file specified, so we're supposed to do a live capture
1445 (or get a list of link-layer types for a live capture device);
1446 do we have support for live captures? */
1453 cmdarg_err("WinPcap couldn't be found.");
1454 detailed_err = cant_load_winpcap_err("TShark");
1455 cmdarg_err_cont("%s", detailed_err);
1456 g_free(detailed_err);
1461 /* trim the interface name and exit if that failed */
1462 if (!capture_opts_trim_iface(&capture_opts,
1463 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1467 /* if requested, list the link layer types and exit */
1468 if (list_link_layer_types) {
1469 status = capture_opts_list_link_layer_types(&capture_opts);
1473 if (!print_packet_info && !quiet) {
1475 * We're not printing information for each packet, and the user
1476 * didn't ask us not to print a count of packets as they arrive,
1477 * so print that count so the user knows that packets are arriving.
1479 * XXX - what if the user wants to do a live capture, doesn't want
1480 * to save it to a file, doesn't want information printed for each
1481 * packet, does want some "-z" statistic, and wants packet counts
1482 * so they know whether they're seeing any packets?
1484 print_packet_counts = TRUE;
1487 /* For now, assume libpcap gives microsecond precision. */
1488 timestamp_set_precision(TS_PREC_AUTO_USEC);
1492 if (capture_opts.multi_files_on) {
1496 /* No - complain. */
1497 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1502 draw_tap_listeners(TRUE);
1503 funnel_dump_all_text_windows();
1510 /* Do the low-level work of a capture.
1511 Returns TRUE if it succeeds, FALSE otherwise. */
1513 static condition *volatile cnd_file_duration = NULL; /* this must be visible in process_packet */
1519 int volatile volatile_err = 0;
1520 int volatile inpkts = 0;
1522 condition *volatile cnd_autostop_size = NULL;
1523 condition *volatile cnd_autostop_duration = NULL;
1526 void (*oldhandler)(int);
1528 struct pcap_stat stats;
1531 gboolean cfilter_error = FALSE;
1532 char errmsg[1024+1];
1533 char secondary_errmsg[4096+1];
1536 /* Initialize all data structures used for dissection. */
1539 ld.wtap_linktype = WTAP_ENCAP_UNKNOWN;
1541 ld.packet_cb = capture_pcap_cb;
1544 /* open the "input file" from network interface or capture pipe */
1545 if (!capture_loop_open_input(&capture_opts, &ld, errmsg, sizeof(errmsg),
1546 secondary_errmsg, sizeof(secondary_errmsg))) {
1551 * We've opened the capture device, so we shouldn't need any special
1552 * privileges any more; relinquish those privileges.
1554 * XXX - if we have saved set-user-ID support, we should give up those
1555 * privileges immediately, and then reclaim them long enough to get
1556 * a list of network interfaces and to open one, and then give them
1557 * up again, so that stuff we do while processing the argument list,
1558 * reading the user's preferences, loading and starting plugins
1559 * (especially *user* plugins), etc. is done with the user's privileges,
1560 * not special privileges.
1562 relinquish_special_privs_perm();
1564 /* init the input filter from the network interface (capture pipe will do nothing) */
1565 switch (capture_loop_init_filter(ld.pcap_h, ld.from_cap_pipe, capture_opts.iface, capture_opts.cfilter)) {
1567 case INITFILTER_NO_ERROR:
1570 case INITFILTER_BAD_FILTER:
1571 cfilter_error = TRUE;
1572 g_snprintf(errmsg, sizeof(errmsg), "%s", pcap_geterr(ld.pcap_h));
1573 *secondary_errmsg = '\0';
1576 case INITFILTER_OTHER_ERROR:
1577 g_snprintf(errmsg, sizeof(errmsg), "Can't install filter (%s).",
1578 pcap_geterr(ld.pcap_h));
1579 g_snprintf(secondary_errmsg, sizeof(secondary_errmsg), "%s", please_report);
1583 if (capture_opts.saving_to_file) {
1584 /* open the output file (temporary/specified name/ringbuffer/named pipe/stdout) */
1585 if (!capture_loop_open_output(&capture_opts, &save_file_fd, errmsg, sizeof(errmsg))) {
1586 *secondary_errmsg = '\0';
1590 /* set up to write to the already-opened capture output file/files */
1591 if(!capture_loop_init_output(&capture_opts, save_file_fd, &ld, errmsg, sizeof errmsg)) {
1592 *secondary_errmsg = '\0';
1596 /* Save the capture file name. */
1597 ld.save_file = capture_opts.save_file;
1600 ld.wtap_linktype = wtap_pcap_encap_to_wtap_encap(ld.linktype);
1603 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1604 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1606 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1608 XXX - deal with signal semantics on various UNIX platforms. Or just
1609 use "sigaction()" and be done with it? */
1610 signal(SIGTERM, capture_cleanup);
1611 signal(SIGINT, capture_cleanup);
1612 if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
1613 signal(SIGHUP, oldhandler);
1616 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1617 quiet mode, report the number of packets we've captured. */
1618 signal(SIGINFO, report_counts_siginfo);
1619 #endif /* SIGINFO */
1622 /* Let the user know what interface was chosen. */
1623 descr = get_interface_descriptive_name(capture_opts.iface);
1624 fprintf(stderr, "Capturing on %s\n", descr);
1627 /* initialize capture stop conditions */
1628 init_capture_stop_conditions();
1629 /* create stop conditions */
1630 if (capture_opts.has_autostop_filesize)
1631 cnd_autostop_size = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
1632 (long)capture_opts.autostop_filesize * 1024);
1633 if (capture_opts.has_autostop_duration)
1634 cnd_autostop_duration = cnd_new((const char*)CND_CLASS_TIMEOUT,
1635 (gint32)capture_opts.autostop_duration);
1637 if (capture_opts.multi_files_on && capture_opts.has_file_duration)
1638 cnd_file_duration = cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
1640 if (!setjmp(ld.stopenv)) {
1642 ld.packet_count = 0;
1647 /* We need to be careful with automatic variables defined in the
1648 outer scope which are changed inside the loop. Most compilers
1649 don't try to roll them back to their original values after the
1650 longjmp which causes the loop to finish, but all that the
1651 standards say is that their values are indeterminate. If we
1652 don't want them to be rolled back, we should define them with the
1653 volatile attribute (paraphrasing W. Richard Stevens, Advanced
1654 Programming in the UNIX Environment, p. 178).
1656 The "err" variable causes a particular problem. If we give it
1657 the volatile attribute, then when we pass a reference to it (as
1658 in "&err") to a function, GCC warns: "passing arg <n> of
1659 <function> discards qualifiers from pointer target type".
1660 Therefore within the loop and just beyond we don't use "err".
1661 Within the loop we define "loop_err", and assign its value to
1662 "volatile_err", which is in the outer scope and is checked when
1665 We also define "packet_count_prev" here to keep things tidy,
1666 since it's used only inside the loop. If it were defined in the
1667 outer scope, GCC would give a warning (unnecessary in this case)
1668 that it might be clobbered, and we'd need to give it the volatile
1669 attribute to suppress the warning. */
1672 int packet_count_prev = 0;
1674 if (cnd_autostop_size == NULL && cnd_autostop_duration == NULL) {
1675 /* We're not stopping at a particular capture file size, and we're
1676 not stopping after some particular amount of time has expired,
1677 so either we have no stop condition or the only stop condition
1678 is a maximum packet count.
1680 If there's no maximum packet count, pass it -1, meaning "until
1681 you run out of packets in the bufferful you read". Otherwise,
1682 pass it the number of packets we have left to capture.
1684 We don't call "pcap_loop()" as, if we're saving to a file that's
1685 a FIFO, we want to flush the FIFO after we're done processing
1686 this libpcap bufferful of packets, so that the program
1687 reading the FIFO sees the packets immediately and doesn't get
1688 any partial packet, forcing it to block in the middle of reading
1690 if (capture_opts.autostop_packets == 0)
1693 if (ld.packet_count >= capture_opts.autostop_packets) {
1694 /* XXX do we need this test here? */
1695 /* It appears there's nothing more to capture. */
1698 pcap_cnt = capture_opts.autostop_packets - ld.packet_count;
1701 /* We need to check the capture file size or the timeout after
1706 inpkts = capture_loop_dispatch(NULL, &ld, errmsg, sizeof errmsg);
1708 /* Error from "pcap_dispatch()", or error or "no more packets" from
1709 "cap_pipe_dispatch(). */
1711 } else if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
1712 /* The specified capture time has elapsed; stop the capture. */
1714 } else if (inpkts > 0) {
1715 if (capture_opts.autostop_packets != 0 &&
1716 ld.packet_count >= capture_opts.autostop_packets) {
1717 /* The specified number of packets have been captured and have
1718 passed both any capture filter in effect and any read filter
1721 } else if (cnd_autostop_size != NULL &&
1722 cnd_eval(cnd_autostop_size, (guint32)ld.bytes_written)) {
1723 /* We're saving the capture to a file, and the capture file reached
1724 its maximum size. */
1725 if (capture_opts.multi_files_on) {
1726 /* Switch to the next ringbuffer file */
1727 if (ringbuf_switch_file(&ld.pdh, &capture_opts.save_file,
1728 &save_file_fd, &ld.bytes_written,
1730 /* File switch succeeded: reset the condition */
1731 cnd_reset(cnd_autostop_size);
1732 if (cnd_file_duration) {
1733 cnd_reset(cnd_file_duration);
1736 /* File switch failed: stop here */
1737 volatile_err = loop_err;
1741 /* No ringbuffer - just stop. */
1745 if (capture_opts.output_to_pipe) {
1746 if (ld.packet_count > packet_count_prev) {
1747 libpcap_dump_flush(ld.pdh, NULL);
1748 packet_count_prev = ld.packet_count;
1752 } /* while (ld.go) */
1754 /* delete stop conditions */
1755 if (cnd_autostop_size != NULL)
1756 cnd_delete(cnd_autostop_size);
1757 if (cnd_autostop_duration != NULL)
1758 cnd_delete(cnd_autostop_duration);
1759 if (cnd_file_duration != NULL)
1760 cnd_delete(cnd_file_duration);
1762 if (print_packet_counts) {
1763 /* We're printing packet counts to stderr.
1764 Send a newline so that we move to the line after the packet count. */
1765 fprintf(stderr, "\n");
1768 /* If we got an error while capturing, report it. */
1770 if (ld.from_cap_pipe) {
1771 if (ld.cap_pipe_err == PIPERR) {
1772 cmdarg_err("Error while capturing packets: %s", errmsg);
1775 cmdarg_err("Error while capturing packets: %s", pcap_geterr(ld.pcap_h));
1779 if (volatile_err == 0)
1782 show_capture_file_io_error(capture_opts.save_file, volatile_err, FALSE);
1786 if (capture_opts.save_file != NULL) {
1787 /* We're saving to a file or files; close all files. */
1788 close_ok = capture_loop_close_output(&capture_opts, &ld, &err);
1790 /* If we've displayed a message about a write error, there's no point
1791 in displaying another message about an error on close. */
1792 if (!close_ok && write_ok)
1793 show_capture_file_io_error(capture_opts.save_file, err, TRUE);
1796 if (ld.from_cap_pipe && ld.cap_pipe_fd >= 0)
1797 eth_close(ld.cap_pipe_fd);
1799 /* Get the capture statistics, and, if any packets were dropped, report
1801 if (pcap_stats(ld.pcap_h, &stats) >= 0) {
1802 if (stats.ps_drop != 0) {
1803 fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
1806 cmdarg_err("Can't get packet-drop statistics: %s", pcap_geterr(ld.pcap_h));
1808 pcap_close(ld.pcap_h);
1811 /* Report the number of captured packets if not reported during capture
1812 and we are saving to a file. */
1818 if (capture_opts.multi_files_on) {
1819 ringbuf_error_cleanup();
1821 g_free(capture_opts.save_file);
1822 capture_opts.save_file = NULL;
1823 if (cfilter_error) {
1824 dfilter_t *rfcode = NULL;
1825 if (dfilter_compile(capture_opts.cfilter, &rfcode) && rfcode != NULL) {
1827 "Invalid capture filter: \"%s\"!\n"
1829 "That string looks like a valid display filter; however, it isn't a valid\n"
1830 "capture filter (%s).\n"
1832 "Note that display filters and capture filters don't have the same syntax,\n"
1833 "so you can't use most display filter expressions as capture filters.\n"
1835 "See the User's Guide for a description of the capture filter syntax.",
1836 capture_opts.cfilter, errmsg);
1837 dfilter_free(rfcode);
1840 "Invalid capture filter: \"%s\"!\n"
1842 "That string isn't a valid capture filter (%s).\n"
1843 "See the User's Guide for a description of the capture filter syntax.",
1844 capture_opts.cfilter, errmsg);
1847 cmdarg_err("%s", errmsg);
1848 if (*secondary_errmsg != '\0') {
1849 fprintf(stderr, "\n");
1850 cmdarg_err_cont("%s", secondary_errmsg);
1853 if (ld.from_cap_pipe) {
1854 if (ld.cap_pipe_fd >= 0)
1855 eth_close(ld.cap_pipe_fd);
1857 if (ld.pcap_h != NULL)
1858 pcap_close(ld.pcap_h);
1865 capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
1868 struct wtap_pkthdr whdr;
1869 union wtap_pseudo_header pseudo_header;
1870 const guchar *wtap_pd;
1871 loop_data *ld = (loop_data *) user;
1875 gboolean packet_accepted;
1879 * Prevent a SIGINFO handler from writing to stdout while we're
1880 * doing so; instead, have it just set a flag telling us to print
1881 * that information when we're done.
1884 #endif /* SIGINFO */
1886 /* The current packet may have arrived after a very long silence,
1887 * way past the time to switch files. In order not to have
1888 * the first packet of a new series of events as the last
1889 * [or only] packet in the file, switch before writing!
1891 if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
1892 /* time elapsed for this ring file, switch to the next */
1893 if (ringbuf_switch_file(&ld->pdh, &ld->save_file, &save_file_fd,
1894 &ld->bytes_written, &loop_err)) {
1895 /* File switch succeeded: reset the condition */
1896 cnd_reset(cnd_file_duration);
1898 /* File switch failed: stop here */
1899 /* XXX - we should do something with "loop_err" */
1904 if (do_dissection) {
1905 /* We're goint to print packet information, run a read filter, or
1906 process taps. Use process_packet() to handle that; in order
1907 to do that, we need to convert from libpcap to Wiretap format.
1908 If that fails, ignore the packet (wtap_process_pcap_packet has
1909 written an error message). */
1910 wtap_pd = wtap_process_pcap_packet(ld->wtap_linktype, phdr, pd,
1911 &pseudo_header, &whdr, &err);
1912 if (wtap_pd == NULL)
1915 packet_accepted = process_packet(&cfile, 0, &whdr, &pseudo_header, wtap_pd);
1917 /* We're just writing out packets. */
1918 packet_accepted = TRUE;
1921 if (packet_accepted) {
1922 /* Count this packet. */
1927 if (ld->pdh != NULL) {
1928 if (!libpcap_write_packet(ld->pdh, phdr, pd, &ld->bytes_written, &err)) {
1929 /* Error writing to a capture file */
1930 if (print_packet_counts) {
1931 /* We're printing counts of packets captured; move to the line after
1933 fprintf(stderr, "\n");
1935 show_capture_file_io_error(ld->save_file, err, FALSE);
1936 pcap_close(ld->pcap_h);
1937 libpcap_dump_close(ld->pdh, &err);
1941 if (print_packet_counts) {
1942 /* We're printing packet counts. */
1943 if (ld->packet_count != 0) {
1944 fprintf(stderr, "\r%u ", ld->packet_count);
1945 /* stderr could be line buffered */
1953 * Allow SIGINFO handlers to write.
1958 * If a SIGINFO handler asked us to write out capture counts, do so.
1962 #endif /* SIGINFO */
1967 capture_cleanup(DWORD ctrltype _U_)
1969 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
1970 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
1971 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
1972 like SIGTERM at least when the machine's shutting down.
1974 For now, we handle them all as indications that we should clean up
1975 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
1978 However, as handlers run in a new thread, we can't just longjmp
1979 out; we have to set "ld.go" to FALSE, and must return TRUE so that
1980 no other handler - such as one that would terminate the process -
1983 XXX - for some reason, typing ^C to TShark, if you run this in
1984 a Cygwin console window in at least some versions of Cygwin,
1985 causes TShark to terminate immediately; this routine gets
1986 called, but the main loop doesn't get a chance to run and
1987 exit cleanly, at least if this is compiled with Microsoft Visual
1988 C++ (i.e., it's a property of the Cygwin console window or Bash;
1989 it happens if TShark is not built with Cygwin - for all I know,
1990 building it with Cygwin may make the problem go away). */
1996 capture_cleanup(int signum _U_)
1998 /* Longjmp back to the starting point; "pcap_dispatch()", on many
1999 UNIX platforms, just keeps looping if it gets EINTR, so if we set
2000 "ld.go" to FALSE and return, we won't break out of it and quit
2002 longjmp(ld.stopenv, 1);
2010 /* XXX - if we use sigaction, this doesn't have to be done.
2011 (Yes, this isn't necessary on BSD, but just in case a system
2012 where "signal()" has AT&T semantics adopts SIGINFO....) */
2013 signal(SIGINFO, report_counts_siginfo);
2014 #endif /* SIGINFO */
2016 if (!print_packet_counts) {
2017 /* Report the count only if we aren't printing a packet count
2018 as packets arrive. */
2019 fprintf(stderr, "%u packets captured\n", ld.packet_count);
2022 infoprint = FALSE; /* we just reported it */
2023 #endif /* SIGINFO */
2028 report_counts_siginfo(int signum _U_)
2030 int sav_errno = errno;
2031 /* If we've been told to delay printing, just set a flag asking
2032 that we print counts (if we're supposed to), otherwise print
2033 the count of packets captured (if we're supposed to). */
2040 #endif /* SIGINFO */
2041 #endif /* HAVE_LIBPCAP */
2044 load_cap_file(capture_file *cf, char *save_file, int out_file_type)
2047 int snapshot_length;
2052 char *save_file_string = NULL;
2054 linktype = wtap_file_encap(cf->wth);
2055 if (save_file != NULL) {
2056 /* Get a string that describes what we're writing to */
2057 save_file_string = output_file_description(save_file);
2059 /* Set up to write to the capture file. */
2060 snapshot_length = wtap_snapshot_length(cf->wth);
2061 if (snapshot_length == 0) {
2062 /* Snapshot length of input file not known. */
2063 snapshot_length = WTAP_MAX_PACKET_SIZE;
2065 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2066 FALSE /* compressed */, &err);
2069 /* We couldn't set up to write to the capture file. */
2072 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2073 cmdarg_err("Capture files can't be written in that format.");
2076 case WTAP_ERR_UNSUPPORTED_ENCAP:
2077 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2078 cmdarg_err("The capture file being read can't be written in "
2082 case WTAP_ERR_CANT_OPEN:
2083 cmdarg_err("The %s couldn't be created for some "
2084 "unknown reason.", save_file_string);
2087 case WTAP_ERR_SHORT_WRITE:
2088 cmdarg_err("A full header couldn't be written to the %s.",
2093 cmdarg_err("The %s could not be created: %s.", save_file_string,
2094 wtap_strerror(err));
2100 if (print_packet_info) {
2101 if (!write_preamble(cf)) {
2103 show_print_file_io_error(err);
2109 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2110 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2111 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2112 /* Either there's no read filtering or this packet passed the
2113 filter, so, if we're writing to a capture file, write
2116 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2117 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2119 /* Error writing to a capture file */
2120 show_capture_file_io_error(save_file, err, FALSE);
2121 wtap_dump_close(pdh, &err);
2128 /* Print a message noting that the read failed somewhere along the line. */
2131 case WTAP_ERR_UNSUPPORTED_ENCAP:
2132 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2133 cf->filename, err_info);
2136 case WTAP_ERR_CANT_READ:
2137 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2141 case WTAP_ERR_SHORT_READ:
2142 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2146 case WTAP_ERR_BAD_RECORD:
2147 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2148 cf->filename, err_info);
2152 cmdarg_err("An error occurred while reading \"%s\": %s.",
2153 cf->filename, wtap_strerror(err));
2156 if (save_file != NULL) {
2157 /* Now close the capture file. */
2158 if (!wtap_dump_close(pdh, &err))
2159 show_capture_file_io_error(save_file, err, TRUE);
2162 if (save_file != NULL) {
2163 /* Now close the capture file. */
2164 if (!wtap_dump_close(pdh, &err))
2165 show_capture_file_io_error(save_file, err, TRUE);
2167 if (print_packet_info) {
2168 if (!write_finale()) {
2170 show_print_file_io_error(err);
2177 wtap_close(cf->wth);
2180 if (save_file_string != NULL)
2181 g_free(save_file_string);
2187 fill_in_fdata(frame_data *fdata, capture_file *cf,
2188 const struct wtap_pkthdr *phdr, long offset)
2193 fdata->num = cf->count;
2194 fdata->pkt_len = phdr->len;
2195 cum_bytes += phdr->len;
2196 fdata->cum_bytes = cum_bytes;
2197 fdata->cap_len = phdr->caplen;
2198 fdata->file_off = offset;
2199 fdata->lnk_t = phdr->pkt_encap;
2200 fdata->abs_ts = *((nstime_t *) &phdr->ts);
2201 fdata->flags.passed_dfilter = 0;
2202 fdata->flags.encoding = CHAR_ASCII;
2203 fdata->flags.visited = 0;
2204 fdata->flags.marked = 0;
2205 fdata->flags.ref_time = 0;
2206 fdata->color_filter = NULL;
2208 /* If we don't have the time stamp of the first packet in the
2209 capture, it's because this is the first packet. Save the time
2210 stamp of this packet as the time stamp of the first packet. */
2211 if (nstime_is_zero(&first_ts)) {
2212 first_ts = fdata->abs_ts;
2215 /* If we don't have the time stamp of the previous displayed packet,
2216 it's because this is the first displayed packet. Save the time
2217 stamp of this packet as the time stamp of the previous displayed
2219 if (nstime_is_zero(&prev_ts)) {
2220 prev_ts = fdata->abs_ts;
2223 /* Get the time elapsed between the first packet and this packet. */
2224 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2226 /* If it's greater than the current elapsed time, set the elapsed time
2227 to it (we check for "greater than" so as not to be confused by
2228 time moving backwards). */
2229 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2230 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2231 cf->elapsed_time = fdata->rel_ts;
2234 /* Get the time elapsed between the previous displayed packet and
2236 nstime_delta(&fdata->del_ts, &fdata->abs_ts, &prev_ts);
2237 prev_ts = fdata->abs_ts;
2240 /* Free up all data attached to a "frame_data" structure. */
2242 clear_fdata(frame_data *fdata)
2245 g_slist_free(fdata->pfd);
2249 process_packet(capture_file *cf, long offset, const struct wtap_pkthdr *whdr,
2250 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2253 gboolean create_proto_tree;
2254 epan_dissect_t *edt;
2257 /* Count this packet. */
2260 /* If we're going to print packet information, or we're going to
2261 run a read filter, or we're going to process taps, set up to
2262 do a dissection and do so. */
2263 if (do_dissection) {
2264 fill_in_fdata(&fdata, cf, whdr, offset);
2266 if (print_packet_info) {
2267 /* Grab any resolved addresses */
2269 if (g_resolv_flags) {
2270 host_name_lookup_process(NULL);
2275 if (cf->rfcode || verbose || num_tap_filters!=0)
2276 create_proto_tree = TRUE;
2278 create_proto_tree = FALSE;
2279 /* The protocol tree will be "visible", i.e., printed, only if we're
2280 printing packet details, which is true if we're printing stuff
2281 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2283 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2285 /* If we're running a read filter, prime the epan_dissect_t with that
2288 epan_dissect_prime_dfilter(edt, cf->rfcode);
2290 tap_queue_init(edt);
2292 /* We only need the columns if we're printing packet info but we're
2293 *not* verbose; in verbose mode, we print the protocol tree, not
2294 the protocol summary. */
2295 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2296 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2298 tap_push_tapped_queue(edt);
2300 /* Run the read filter if we have one. */
2302 passed = dfilter_apply_edt(cf->rfcode, edt);
2306 /* We're not running a display filter and we're not printing any
2307 packet information, so we don't need to do a dissection, and all
2308 packets are processed. */
2314 /* Process this packet. */
2315 if (print_packet_info) {
2316 /* We're printing packet information; print the information for
2318 print_packet(cf, edt);
2320 /* The ANSI C standard does not appear to *require* that a line-buffered
2321 stream be flushed to the host environment whenever a newline is
2322 written, it just says that, on such a stream, characters "are
2323 intended to be transmitted to or from the host environment as a
2324 block when a new-line character is encountered".
2326 The Visual C++ 6.0 C implementation doesn't do what is intended;
2327 even if you set a stream to be line-buffered, it still doesn't
2328 flush the buffer at the end of every line.
2330 So, if the "-l" flag was specified, we flush the standard output
2331 at the end of a packet. This will do the right thing if we're
2332 printing packet summary lines, and, as we print the entire protocol
2333 tree for a single packet without waiting for anything to happen,
2334 it should be as good as line-buffered mode if we're printing
2335 protocol trees. (The whole reason for the "-l" flag in either
2336 tcpdump or TShark is to allow the output of a live capture to
2337 be piped to a program or script and to have that script see the
2338 information for the packet as soon as it's printed, rather than
2339 having to wait until a standard I/O buffer fills up. */
2343 if (ferror(stdout)) {
2344 show_print_file_io_error(errno);
2350 if (do_dissection) {
2351 epan_dissect_free(edt);
2352 clear_fdata(&fdata);
2358 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2360 char *save_file_string;
2362 save_file_string = output_file_description(fname);
2367 cmdarg_err("Not all the packets could be written to the %s because there is "
2368 "no space left on the file system.",
2374 cmdarg_err("Not all the packets could be written to the %s because you are "
2375 "too close to, or over your disk quota.",
2380 case WTAP_ERR_CANT_CLOSE:
2381 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2385 case WTAP_ERR_SHORT_WRITE:
2386 cmdarg_err("Not all the packets could be written to the %s.",
2392 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2393 wtap_strerror(err));
2395 cmdarg_err("An error occurred while writing to the %s: %s.",
2396 save_file_string, wtap_strerror(err));
2400 g_free(save_file_string);
2404 write_preamble(capture_file *cf)
2406 switch (output_action) {
2409 return print_preamble(print_stream, cf->filename);
2414 write_pdml_preamble(stdout);
2416 write_psml_preamble(stdout);
2417 return !ferror(stdout);
2420 g_assert_not_reached();
2426 get_line_buf(size_t len)
2428 static char *line_bufp = NULL;
2429 static size_t line_buf_len = 256;
2430 size_t new_line_buf_len;
2432 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2433 new_line_buf_len *= 2)
2435 if (line_bufp == NULL) {
2436 line_buf_len = new_line_buf_len;
2437 line_bufp = g_malloc(line_buf_len + 1);
2439 if (new_line_buf_len > line_buf_len) {
2440 line_buf_len = new_line_buf_len;
2441 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2448 print_columns(capture_file *cf)
2455 line_bufp = get_line_buf(256);
2458 for (i = 0; i < cf->cinfo.num_cols; i++) {
2459 switch (cf->cinfo.col_fmt[i]) {
2463 * Don't print this if we're doing a live capture from a network
2464 * interface - if we're doing a live capture, you won't be
2465 * able to look at the capture in the future (it's not being
2466 * saved anywhere), so the frame numbers are unlikely to be
2469 * (XXX - it might be nice to be able to save and print at
2470 * the same time, sort of like an "Update list of packets
2471 * in real time" capture in Wireshark.)
2473 if (capture_opts.iface != NULL)
2476 column_len = strlen(cf->cinfo.col_data[i]);
2479 line_bufp = get_line_buf(buf_offset + column_len);
2480 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2486 case COL_ABS_DATE_TIME: /* XXX - wider */
2487 column_len = strlen(cf->cinfo.col_data[i]);
2488 if (column_len < 10)
2490 line_bufp = get_line_buf(buf_offset + column_len);
2491 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2497 case COL_DEF_DL_SRC:
2498 case COL_RES_DL_SRC:
2499 case COL_UNRES_DL_SRC:
2500 case COL_DEF_NET_SRC:
2501 case COL_RES_NET_SRC:
2502 case COL_UNRES_NET_SRC:
2503 column_len = strlen(cf->cinfo.col_data[i]);
2504 if (column_len < 12)
2506 line_bufp = get_line_buf(buf_offset + column_len);
2507 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2513 case COL_DEF_DL_DST:
2514 case COL_RES_DL_DST:
2515 case COL_UNRES_DL_DST:
2516 case COL_DEF_NET_DST:
2517 case COL_RES_NET_DST:
2518 case COL_UNRES_NET_DST:
2519 column_len = strlen(cf->cinfo.col_data[i]);
2520 if (column_len < 12)
2522 line_bufp = get_line_buf(buf_offset + column_len);
2523 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2527 column_len = strlen(cf->cinfo.col_data[i]);
2528 line_bufp = get_line_buf(buf_offset + column_len);
2529 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2532 buf_offset += column_len;
2533 if (i != cf->cinfo.num_cols - 1) {
2535 * This isn't the last column, so we need to print a
2536 * separator between this column and the next.
2538 * If we printed a network source and are printing a
2539 * network destination of the same type next, separate
2540 * them with "->"; if we printed a network destination
2541 * and are printing a network source of the same type
2542 * next, separate them with "<-"; otherwise separate them
2545 * We add enough space to the buffer for " <- " or " -> ",
2546 * even if we're only adding " ".
2548 line_bufp = get_line_buf(buf_offset + 4);
2549 switch (cf->cinfo.col_fmt[i]) {
2554 switch (cf->cinfo.col_fmt[i + 1]) {
2559 strcat(line_bufp + buf_offset, " -> ");
2564 strcat(line_bufp + buf_offset, " ");
2570 case COL_DEF_DL_SRC:
2571 case COL_RES_DL_SRC:
2572 case COL_UNRES_DL_SRC:
2573 switch (cf->cinfo.col_fmt[i + 1]) {
2575 case COL_DEF_DL_DST:
2576 case COL_RES_DL_DST:
2577 case COL_UNRES_DL_DST:
2578 strcat(line_bufp + buf_offset, " -> ");
2583 strcat(line_bufp + buf_offset, " ");
2589 case COL_DEF_NET_SRC:
2590 case COL_RES_NET_SRC:
2591 case COL_UNRES_NET_SRC:
2592 switch (cf->cinfo.col_fmt[i + 1]) {
2594 case COL_DEF_NET_DST:
2595 case COL_RES_NET_DST:
2596 case COL_UNRES_NET_DST:
2597 strcat(line_bufp + buf_offset, " -> ");
2602 strcat(line_bufp + buf_offset, " ");
2611 switch (cf->cinfo.col_fmt[i + 1]) {
2616 strcat(line_bufp + buf_offset, " <- ");
2621 strcat(line_bufp + buf_offset, " ");
2627 case COL_DEF_DL_DST:
2628 case COL_RES_DL_DST:
2629 case COL_UNRES_DL_DST:
2630 switch (cf->cinfo.col_fmt[i + 1]) {
2632 case COL_DEF_DL_SRC:
2633 case COL_RES_DL_SRC:
2634 case COL_UNRES_DL_SRC:
2635 strcat(line_bufp + buf_offset, " <- ");
2640 strcat(line_bufp + buf_offset, " ");
2646 case COL_DEF_NET_DST:
2647 case COL_RES_NET_DST:
2648 case COL_UNRES_NET_DST:
2649 switch (cf->cinfo.col_fmt[i + 1]) {
2651 case COL_DEF_NET_SRC:
2652 case COL_RES_NET_SRC:
2653 case COL_UNRES_NET_SRC:
2654 strcat(line_bufp + buf_offset, " <- ");
2659 strcat(line_bufp + buf_offset, " ");
2666 strcat(line_bufp + buf_offset, " ");
2672 return print_line(print_stream, 0, line_bufp);
2676 print_packet(capture_file *cf, epan_dissect_t *edt)
2678 print_args_t print_args;
2681 /* Print the information in the protocol tree. */
2682 switch (output_action) {
2685 print_args.to_file = TRUE;
2686 print_args.format = print_format;
2687 print_args.print_summary = !verbose;
2688 print_args.print_hex = verbose && print_hex;
2689 print_args.print_formfeed = FALSE;
2690 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2692 /* init the packet range */
2693 packet_range_init(&print_args.range);
2695 if (!proto_tree_print(&print_args, edt, print_stream))
2698 /* "print_hex_data()" will put out a leading blank line, as well
2699 as a trailing one; print one here, to separate the packets,
2700 only if "print_hex_data()" won't be called. */
2701 if (!print_line(print_stream, 0, ""))
2707 proto_tree_write_pdml(edt, stdout);
2709 return !ferror(stdout);
2712 /* Just fill in the columns. */
2713 epan_dissect_fill_in_columns(edt);
2715 /* Now print them. */
2716 switch (output_action) {
2719 if (!print_columns(cf))
2724 proto_tree_write_psml(edt, stdout);
2725 return !ferror(stdout);
2729 if (!print_hex_data(print_stream, edt))
2731 if (!print_line(print_stream, 0, ""))
2740 switch (output_action) {
2743 return print_finale(print_stream);
2748 write_pdml_finale(stdout);
2750 write_psml_finale(stdout);
2751 return !ferror(stdout);
2754 g_assert_not_reached();
2760 show_print_file_io_error(int err)
2765 cmdarg_err("Not all the packets could be printed because there is "
2766 "no space left on the file system.");
2771 cmdarg_err("Not all the packets could be printed because you are "
2772 "too close to, or over your disk quota.");
2777 cmdarg_err("An error occurred while printing packets: %s.",
2784 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2788 static char errmsg_errno[1024+1];
2791 /* Wiretap error. */
2794 case WTAP_ERR_NOT_REGULAR_FILE:
2795 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2798 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2799 /* Seen only when opening a capture file for reading. */
2800 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2803 case WTAP_ERR_UNSUPPORTED:
2804 /* Seen only when opening a capture file for reading. */
2805 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2806 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2809 errmsg = errmsg_errno;
2812 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2813 /* Seen only when opening a capture file for writing. */
2814 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2815 "The file \"%%s\" is a pipe, and %s capture files can't be "
2816 "written to a pipe.", wtap_file_type_string(file_type));
2817 errmsg = errmsg_errno;
2820 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2821 /* Seen only when opening a capture file for writing. */
2822 errmsg = "TShark doesn't support writing capture files in that format.";
2825 case WTAP_ERR_UNSUPPORTED_ENCAP:
2827 errmsg = "TShark can't save this capture in that format.";
2829 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2830 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2833 errmsg = errmsg_errno;
2837 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2839 errmsg = "TShark can't save this capture in that format.";
2841 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
2844 case WTAP_ERR_BAD_RECORD:
2845 /* Seen only when opening a capture file for reading. */
2846 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2847 "The file \"%%s\" appears to be damaged or corrupt.\n"
2850 errmsg = errmsg_errno;
2853 case WTAP_ERR_CANT_OPEN:
2855 errmsg = "The file \"%s\" could not be created for some unknown reason.";
2857 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
2860 case WTAP_ERR_SHORT_READ:
2861 errmsg = "The file \"%s\" appears to have been cut short"
2862 " in the middle of a packet or other data.";
2865 case WTAP_ERR_SHORT_WRITE:
2866 errmsg = "A full header couldn't be written to the file \"%s\".";
2870 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2871 "The file \"%%s\" could not be %s: %s.",
2872 for_writing ? "created" : "opened",
2873 wtap_strerror(err));
2874 errmsg = errmsg_errno;
2878 errmsg = file_open_error_message(err, for_writing);
2883 * Open/create errors are reported with an console message in TShark.
2886 open_failure_message(const char *filename, int err, gboolean for_writing)
2888 fprintf(stderr, "tshark: ");
2889 fprintf(stderr, file_open_error_message(err, for_writing), filename);
2890 fprintf(stderr, "\n");
2894 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
2898 char err_msg[2048+1];
2900 wth = wtap_open_offline(fname, err, &err_info, FALSE);
2904 /* The open succeeded. Fill in the information for this file. */
2906 /* Initialize all data structures used for dissection. */
2910 cf->f_datalen = 0; /* not used, but set it anyway */
2912 /* Set the file name because we need it to set the follow stream filter.
2913 XXX - is that still true? We need it for other reasons, though,
2915 cf->filename = g_strdup(fname);
2917 /* Indicate whether it's a permanent or temporary file. */
2918 cf->is_tempfile = is_tempfile;
2920 /* If it's a temporary capture buffer file, mark it as not saved. */
2921 cf->user_saved = !is_tempfile;
2923 cf->cd_t = wtap_file_type(cf->wth);
2925 cf->drops_known = FALSE;
2927 cf->snap = wtap_snapshot_length(cf->wth);
2928 if (cf->snap == 0) {
2929 /* Snapshot length not known. */
2930 cf->has_snap = FALSE;
2931 cf->snap = WTAP_MAX_PACKET_SIZE;
2933 cf->has_snap = TRUE;
2934 nstime_set_zero(&cf->elapsed_time);
2935 nstime_set_zero(&first_ts);
2936 nstime_set_zero(&prev_ts);
2941 g_snprintf(err_msg, sizeof err_msg,
2942 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
2943 cmdarg_err("%s", err_msg);
2949 * General errors are reported with an console message in TShark.
2952 failure_message(const char *msg_format, va_list ap)
2954 fprintf(stderr, "tshark: ");
2955 vfprintf(stderr, msg_format, ap);
2956 fprintf(stderr, "\n");
2960 * Read errors are reported with an console message in TShark.
2963 read_failure_message(const char *filename, int err)
2965 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
2966 filename, strerror(err));
2970 * Report an error in command-line arguments.
2973 cmdarg_err(const char *fmt, ...)
2978 fprintf(stderr, "tshark: ");
2979 vfprintf(stderr, fmt, ap);
2980 fprintf(stderr, "\n");
2985 * Report additional information for an error in command-line arguments.
2988 cmdarg_err_cont(const char *fmt, ...)
2993 vfprintf(stderr, fmt, ap);
2994 fprintf(stderr, "\n");
2999 /****************************************************************************************************************/
3000 /* indication report "dummies", needed for capture_loop.c */
3004 /** Report a new capture file having been opened. */
3006 report_new_capture_file(const char *filename)
3008 /* shouldn't happen */
3009 g_assert_not_reached();
3012 /** Report a number of new packets captured. */
3014 report_packet_count(int packet_count)
3016 /* shouldn't happen */
3017 g_assert_not_reached();
3020 /** Report the packet drops once the capture finishes. */
3022 report_packet_drops(int drops)
3024 /* shouldn't happen */
3025 g_assert_not_reached();
3028 /** Report an error in the capture. */
3030 report_capture_error(const char *errmsg, const char *secondary_error_msg)
3033 cmdarg_err_cont(secondary_error_msg);
3036 /** Report an error with a capture filter. */
3038 report_cfilter_error(const char *cfilter, const char *errmsg)
3042 "Invalid capture filter: \"%s\"!\n"
3044 "That string isn't a valid capture filter (%s).\n"
3045 "See the User's Guide for a description of the capture filter syntax.",
3049 #endif /* HAVE_LIBPCAP */
3052 /****************************************************************************************************************/
3053 /* signal pipe "dummies", needed for capture_loop.c */
3059 signal_pipe_check_running(void)
3061 /* currently, no check required */
3066 #endif /* HAVE_LIBPCAP */