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;
699 #define OPTSTRING_INIT "a:b:c:d:Df:F:G:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
702 #define OPTSTRING_WIN32 "B:"
704 #define OPTSTRING_WIN32 ""
707 #define OPTSTRING_WIN32 ""
708 #endif /* HAVE_LIBPCAP */
710 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
713 * Attempt to get the pathname of the executable file.
715 init_progfile_dir_error = init_progfile_dir(argv[0]);
716 if (init_progfile_dir_error != NULL) {
717 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
718 init_progfile_dir_error);
722 * Get credential information for later use.
724 get_credential_info();
727 * Now attempt to get the pathname of the plugins.
732 * In order to have the -X opts assigned before the wslua machine starts
733 * we need to call getopts before epan_init() gets called.
736 optind_initial = optind;
738 while ((opt = getopt(argc, argv, optstring)) != -1) {
748 optind = optind_initial;
751 /* nothing more than the standard GLib handler, but without a warning */
754 G_LOG_LEVEL_CRITICAL|
759 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
761 g_log_set_handler(NULL,
763 log_func_ignore, NULL /* user_data */);
764 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
766 log_func_ignore, NULL /* user_data */);
768 initialize_funnel_ops();
771 capture_opts_init(&capture_opts, NULL /* cfile */);
774 timestamp_set_type(TS_RELATIVE);
775 timestamp_set_precision(TS_PREC_AUTO);
777 /* Register all dissectors; we must do this before checking for the
778 "-G" flag, as the "-G" flag dumps information registered by the
779 dissectors, and we must do it before we read the preferences, in
780 case any dissectors register preferences. */
781 epan_init(register_all_protocols, register_all_protocol_handoffs,
782 failure_message, open_failure_message, read_failure_message);
784 /* Register all tap listeners; we do this before we parse the arguments,
785 as the "-z" argument can specify a registered tap. */
787 /* we register the plugin taps before the other taps because
788 stats_tree taps plugins will be registered as tap listeners
789 by stats_tree_stat.c and need to registered before that */
791 register_all_plugin_tap_listeners();
793 register_all_tap_listeners();
795 /* Now register the preferences for any non-dissector modules.
796 We must do that before we read the preferences as well. */
797 prefs_register_modules();
799 /* If invoked with the "-G" flag, we dump out information based on
800 the argument to the "-G" flag; if no argument is specified,
801 for backwards compatibility we dump out a glossary of display
804 XXX - we do this here, for now, to support "-G" with no arguments.
805 If none of our build or other processes uses "-G" with no arguments,
806 we can just process it with the other arguments. */
807 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
809 proto_registrar_dump_fields(1);
811 if (strcmp(argv[2], "fields") == 0)
812 proto_registrar_dump_fields(1);
813 else if (strcmp(argv[2], "fields2") == 0)
814 proto_registrar_dump_fields(2);
815 else if (strcmp(argv[2], "fields3") == 0)
816 proto_registrar_dump_fields(3);
817 else if (strcmp(argv[2], "protocols") == 0)
818 proto_registrar_dump_protocols();
819 else if (strcmp(argv[2], "values") == 0)
820 proto_registrar_dump_values();
821 else if (strcmp(argv[2], "decodes") == 0)
822 dissector_dump_decodes();
823 else if (strcmp(argv[2], "defaultprefs") == 0)
825 else if (strcmp(argv[2], "currentprefs") == 0) {
826 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
827 &pf_open_errno, &pf_read_errno, &pf_path);
830 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
837 /* Set the C-language locale to the native environment. */
838 setlocale(LC_ALL, "");
840 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
841 &pf_open_errno, &pf_read_errno, &pf_path);
842 if (gpf_path != NULL) {
843 if (gpf_open_errno != 0) {
844 cmdarg_err("Can't open global preferences file \"%s\": %s.",
845 pf_path, strerror(gpf_open_errno));
847 if (gpf_read_errno != 0) {
848 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
849 pf_path, strerror(gpf_read_errno));
852 if (pf_path != NULL) {
853 if (pf_open_errno != 0) {
854 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
855 strerror(pf_open_errno));
857 if (pf_read_errno != 0) {
858 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
859 pf_path, strerror(pf_read_errno));
865 /* Set the name resolution code's flags from the preferences. */
866 g_resolv_flags = prefs->name_resolve;
868 /* Read the disabled protocols file. */
869 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
870 &dp_path, &dp_open_errno, &dp_read_errno);
871 if (gdp_path != NULL) {
872 if (gdp_open_errno != 0) {
873 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
874 gdp_path, strerror(gdp_open_errno));
876 if (gdp_read_errno != 0) {
877 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
878 gdp_path, strerror(gdp_read_errno));
882 if (dp_path != NULL) {
883 if (dp_open_errno != 0) {
885 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
886 strerror(dp_open_errno));
888 if (dp_read_errno != 0) {
890 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
891 strerror(dp_read_errno));
897 /* Load Wpcap, if possible */
901 init_cap_file(&cfile);
903 /* Assemble the compile-time version information string */
904 comp_info_str = g_string_new("Compiled ");
905 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
907 /* Assemble the run-time version information string */
908 runtime_info_str = g_string_new("Running ");
909 get_runtime_version_info(runtime_info_str, NULL);
911 /* Print format defaults to this. */
912 print_format = PR_FMT_TEXT;
914 /* Now get our args */
915 while ((opt = getopt(argc, argv, optstring)) != -1) {
917 case 'a': /* autostop criteria */
918 case 'b': /* Ringbuffer option */
919 case 'c': /* Capture xxx packets */
920 case 'f': /* capture filter */
921 case 'i': /* Use interface xxx */
922 case 'p': /* Don't capture in promiscuous mode */
923 case 's': /* Set the snapshot (capture) length */
924 case 'w': /* Write to capture file xxx */
925 case 'y': /* Set the pcap data link type */
927 case 'B': /* Buffer size */
930 status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
935 capture_option_specified = TRUE;
939 case 'd': /* Decode as rule */
940 if (!add_decode_as(optarg))
943 case 'D': /* Print a list of capture devices and exit */
945 status = capture_opts_list_interfaces();
948 capture_option_specified = TRUE;
953 out_file_type = wtap_short_string_to_file_type(optarg);
954 if (out_file_type < 0) {
955 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
956 list_capture_types();
960 case 'h': /* Print help and exit */
964 case 'l': /* "Line-buffer" standard output */
965 /* This isn't line-buffering, strictly speaking, it's just
966 flushing the standard output after the information for
967 each packet is printed; however, that should be good
968 enough for all the purposes to which "-l" is put (and
969 is probably actually better for "-V", as it does fewer
972 See the comment in "process_packet()" for an explanation of
973 why we do that, and why we don't just use "setvbuf()" to
974 make the standard output line-buffered (short version: in
975 Windows, "line-buffered" is the same as "fully-buffered",
976 and the output buffer is only flushed when it fills up). */
977 line_buffered = TRUE;
979 case 'L': /* Print list of link-layer types and exit */
981 list_link_layer_types = TRUE;
984 capture_option_specified = TRUE;
988 case 'n': /* No name resolution */
989 g_resolv_flags = RESOLV_NONE;
991 case 'N': /* Select what types of addresses/port #s to resolve */
992 if (g_resolv_flags == RESOLV_ALL)
993 g_resolv_flags = RESOLV_NONE;
994 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
995 if (badopt != '\0') {
996 cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
1001 case 'o': /* Override preference from command line */
1002 switch (prefs_set_pref(optarg)) {
1007 case PREFS_SET_SYNTAX_ERR:
1008 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1012 case PREFS_SET_NO_SUCH_PREF:
1013 case PREFS_SET_OBSOLETE:
1014 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1019 case 'q': /* Quiet */
1022 case 'r': /* Read capture file xxx */
1023 cf_name = g_strdup(optarg);
1025 case 'R': /* Read file filter */
1028 case 'S': /* show packets in real time */
1029 print_packet_info = TRUE;
1031 case 't': /* Time stamp type */
1032 if (strcmp(optarg, "r") == 0)
1033 timestamp_set_type(TS_RELATIVE);
1034 else if (strcmp(optarg, "a") == 0)
1035 timestamp_set_type(TS_ABSOLUTE);
1036 else if (strcmp(optarg, "ad") == 0)
1037 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1038 else if (strcmp(optarg, "d") == 0)
1039 timestamp_set_type(TS_DELTA);
1040 else if (strcmp(optarg, "e") == 0)
1041 timestamp_set_type(TS_EPOCH);
1043 cmdarg_err("Invalid time stamp type \"%s\"",
1045 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1046 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1050 case 'T': /* printing Type */
1051 if (strcmp(optarg, "text") == 0) {
1052 output_action = WRITE_TEXT;
1053 print_format = PR_FMT_TEXT;
1054 } else if (strcmp(optarg, "ps") == 0) {
1055 output_action = WRITE_TEXT;
1056 print_format = PR_FMT_PS;
1057 } else if (strcmp(optarg, "pdml") == 0) {
1058 output_action = WRITE_XML;
1060 } else if (strcmp(optarg, "psml") == 0) {
1061 output_action = WRITE_XML;
1064 cmdarg_err("Invalid -T parameter.");
1065 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", or \"psml\".");
1069 case 'v': /* Show version and exit */
1070 printf("TShark " VERSION "%s\n"
1077 svnversion, get_copyright_info(), comp_info_str->str,
1078 runtime_info_str->str);
1081 case 'V': /* Verbose */
1084 case 'x': /* Print packet data in hex (and ASCII) */
1090 /* We won't call the init function for the stat this soon
1091 as it would disallow MATE's fields (which are registered
1092 by the preferences set callback) from being used as
1093 part of a tap filter. Instead, we just add the argument
1094 to a list of stat arguments. */
1095 if (!process_stat_cmd_arg(optarg)) {
1096 cmdarg_err("invalid -z argument.");
1097 cmdarg_err_cont(" -z argument must be one of :");
1098 list_stat_cmd_args();
1103 case '?': /* Bad flag - print usage message */
1106 list_capture_types();
1116 /* If no capture filter or read filter has been specified, and there are
1117 still command-line arguments, treat them as the tokens of a capture
1118 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1119 flag was specified. */
1120 if (optind < argc) {
1121 if (cf_name != NULL) {
1122 if (rfilter != NULL) {
1123 cmdarg_err("Read filters were specified both with \"-R\" "
1124 "and with additional command-line arguments");
1127 rfilter = get_args_as_string(argc, argv, optind);
1130 if (capture_opts.has_cfilter) {
1131 cmdarg_err("Capture filters were specified both with \"-f\""
1132 " and with additional command-line arguments");
1135 capture_opts.has_cfilter = TRUE;
1136 capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1138 capture_option_specified = TRUE;
1143 if (!capture_opts.saving_to_file) {
1144 /* We're not saving the capture to a file; if "-q" wasn't specified,
1145 we should print packet information */
1147 print_packet_info = TRUE;
1149 /* We're saving to a file; if we're writing to the standard output.
1150 and we'll also be writing dissected packets to the standard
1151 output, reject the request. At best, we could redirect that
1152 to the standard error; we *can't* write both to the standard
1153 output and have either of them be useful. */
1154 if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
1155 cmdarg_err("You can't write both raw packet data and dissected packets"
1156 " to the standard output.");
1161 #ifndef HAVE_LIBPCAP
1162 if (capture_option_specified)
1163 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1170 /* We don't support capture filters when reading from a capture file
1171 (the BPF compiler doesn't support all link-layer types that we
1172 support in capture files we read). */
1174 if (cf_name != NULL) {
1175 if (capture_opts.has_cfilter) {
1176 cmdarg_err("Only read filters, not capture filters, "
1177 "can be specified when reading a capture file.");
1184 if (output_action != WRITE_TEXT) {
1185 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1191 if (list_link_layer_types) {
1192 /* We're supposed to list the link-layer types for an interface;
1193 did the user also specify a capture file to be read? */
1195 /* Yes - that's bogus. */
1196 cmdarg_err("You can't specify -L and a capture file to be read.");
1199 /* No - did they specify a ring buffer option? */
1200 if (capture_opts.multi_files_on) {
1201 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1205 /* If they didn't specify a "-w" flag, but specified a maximum capture
1206 file size, tell them that this doesn't work, and exit. */
1207 if (capture_opts.has_autostop_filesize && capture_opts.save_file == NULL) {
1208 cmdarg_err("Maximum capture file size specified, but "
1209 "capture isn't being saved to a file.");
1215 * "-r" was specified, so we're reading a capture file.
1216 * Capture options don't apply here.
1218 if (capture_opts.multi_files_on) {
1219 cmdarg_err("Multiple capture files requested, but "
1220 "a capture isn't being done.");
1223 if (capture_opts.has_file_duration) {
1224 cmdarg_err("Switching capture files after a time interval was specified, but "
1225 "a capture isn't being done.");
1228 if (capture_opts.has_ring_num_files) {
1229 cmdarg_err("A ring buffer of capture files was specified, but "
1230 "a capture isn't being done.");
1233 if (capture_opts.has_autostop_files) {
1234 cmdarg_err("A maximum number of capture files was specified, but "
1235 "a capture isn't being done.");
1238 if (capture_opts.has_autostop_packets) {
1239 cmdarg_err("A maximum number of captured packets was specified, but "
1240 "a capture isn't being done.");
1243 if (capture_opts.has_autostop_filesize) {
1244 cmdarg_err("A maximum capture file size was specified, but "
1245 "a capture isn't being done.");
1248 if (capture_opts.has_autostop_duration) {
1249 cmdarg_err("A maximum capture time was specified, but "
1250 "a capture isn't being done.");
1255 * "-r" wasn't specified, so we're doing a live capture.
1257 if (capture_opts.saving_to_file) {
1258 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1260 /* When capturing, we only support writing libpcap format. */
1261 if (out_file_type != WTAP_FILE_PCAP) {
1262 cmdarg_err("Live captures can only be saved in libpcap format.");
1265 if (capture_opts.multi_files_on) {
1266 /* Multiple-file mode works only under certain conditions:
1267 a) it doesn't work if you're writing to the standard output;
1268 b) it doesn't work if you're writing to a pipe;
1269 c) it makes no sense if the maximum file size is set to "infinite"
1270 (XXX - shouldn't that be "if there is no stop criterion",
1271 as you might want to switch files based on a packet count
1273 if (strcmp(capture_opts.save_file, "-") == 0) {
1274 cmdarg_err("Multiple capture files requested, but "
1275 "the capture is being written to the standard output.");
1278 if (capture_opts.output_to_pipe) {
1279 cmdarg_err("Multiple capture files requested, but "
1280 "the capture file is a pipe.");
1283 if (!capture_opts.has_autostop_filesize) {
1284 cmdarg_err("Multiple capture files requested, but "
1285 "no maximum capture file size was specified.");
1290 /* They didn't specify a "-w" flag, so we won't be saving to a
1291 capture file. Check for options that only make sense if
1292 we're saving to a file. */
1293 if (capture_opts.has_autostop_filesize) {
1294 cmdarg_err("Maximum capture file size specified, but "
1295 "capture isn't being saved to a file.");
1298 if (capture_opts.multi_files_on) {
1299 cmdarg_err("Multiple capture files requested, but "
1300 "the capture isn't being saved to a file.");
1309 /* Start windows sockets */
1310 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1313 /* Notify all registered modules that have had any of their preferences
1314 changed either from one of the preferences file or from the command
1315 line that their preferences have changed. */
1318 /* At this point MATE will have registered its field array so we can
1319 have a tap filter with one of MATE's late-registered fields as part
1320 of the filter. We can now process all the "-z" arguments. */
1321 start_requested_stats();
1323 /* disabled protocols as per configuration file */
1324 if (gdp_path == NULL && dp_path == NULL) {
1325 set_disabled_protos_list();
1328 /* Build the column format array */
1329 col_setup(&cfile.cinfo, prefs->num_cols);
1330 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1331 cfile.cinfo.col_fmt[i] = get_column_format(i);
1332 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1333 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1335 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1336 cfile.cinfo.col_data[i] = NULL;
1337 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1338 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1340 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1341 cfile.cinfo.col_fence[i] = 0;
1342 cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1343 cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1346 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1349 for (j = 0; j < NUM_COL_FMTS; j++) {
1350 if (!cfile.cinfo.fmt_matx[i][j])
1353 if (cfile.cinfo.col_first[j] == -1)
1354 cfile.cinfo.col_first[j] = i;
1355 cfile.cinfo.col_last[j] = i;
1360 capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
1361 capture_opts_trim_ring_num_files(&capture_opts);
1364 if (rfilter != NULL) {
1365 if (!dfilter_compile(rfilter, &rfcode)) {
1366 cmdarg_err("%s", dfilter_error_msg);
1368 #ifdef HAVE_PCAP_OPEN_DEAD
1372 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1374 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1376 " Note: That display filter code looks like a valid capture filter;");
1378 " maybe you mixed them up?");
1387 cfile.rfcode = rfcode;
1389 if (print_packet_info) {
1390 /* If we're printing as text or PostScript, we have
1391 to create a print stream. */
1392 if (output_action == WRITE_TEXT) {
1393 switch (print_format) {
1396 print_stream = print_stream_text_stdio_new(stdout);
1400 print_stream = print_stream_ps_stdio_new(stdout);
1404 g_assert_not_reached();
1409 /* We have to dissect each packet if:
1411 we're printing information about each packet;
1413 we're using a read filter on the packets;
1415 we're using any taps. */
1416 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1420 * We're reading a capture file.
1424 * Immediately relinquish any special privileges we have; we must not
1425 * be allowed to read any capture files the user running TShark
1428 relinquish_special_privs_perm();
1430 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1435 /* Set timestamp precision; there should arguably be a command-line
1436 option to let the user set this. */
1437 switch(wtap_file_tsprecision(cfile.wth)) {
1438 case(WTAP_FILE_TSPREC_SEC):
1439 timestamp_set_precision(TS_PREC_AUTO_SEC);
1441 case(WTAP_FILE_TSPREC_DSEC):
1442 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1444 case(WTAP_FILE_TSPREC_CSEC):
1445 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1447 case(WTAP_FILE_TSPREC_MSEC):
1448 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1450 case(WTAP_FILE_TSPREC_USEC):
1451 timestamp_set_precision(TS_PREC_AUTO_USEC);
1453 case(WTAP_FILE_TSPREC_NSEC):
1454 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1457 g_assert_not_reached();
1460 /* Process the packets in the file */
1461 err = load_cap_file(&cfile, capture_opts.save_file, out_file_type);
1468 /* No capture file specified, so we're supposed to do a live capture
1469 (or get a list of link-layer types for a live capture device);
1470 do we have support for live captures? */
1477 cmdarg_err("WinPcap couldn't be found.");
1478 detailed_err = cant_load_winpcap_err("TShark");
1479 cmdarg_err_cont("%s", detailed_err);
1480 g_free(detailed_err);
1485 /* trim the interface name and exit if that failed */
1486 if (!capture_opts_trim_iface(&capture_opts,
1487 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1491 /* if requested, list the link layer types and exit */
1492 if (list_link_layer_types) {
1493 status = capture_opts_list_link_layer_types(&capture_opts);
1497 if (!print_packet_info && !quiet) {
1499 * We're not printing information for each packet, and the user
1500 * didn't ask us not to print a count of packets as they arrive,
1501 * so print that count so the user knows that packets are arriving.
1503 * XXX - what if the user wants to do a live capture, doesn't want
1504 * to save it to a file, doesn't want information printed for each
1505 * packet, does want some "-z" statistic, and wants packet counts
1506 * so they know whether they're seeing any packets?
1508 print_packet_counts = TRUE;
1511 /* For now, assume libpcap gives microsecond precision. */
1512 timestamp_set_precision(TS_PREC_AUTO_USEC);
1516 if (capture_opts.multi_files_on) {
1520 /* No - complain. */
1521 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1526 draw_tap_listeners(TRUE);
1527 funnel_dump_all_text_windows();
1534 /* Do the low-level work of a capture.
1535 Returns TRUE if it succeeds, FALSE otherwise. */
1537 static condition *volatile cnd_file_duration = NULL; /* this must be visible in process_packet */
1543 int volatile volatile_err = 0;
1544 int volatile inpkts = 0;
1546 condition *volatile cnd_autostop_size = NULL;
1547 condition *volatile cnd_autostop_duration = NULL;
1550 void (*oldhandler)(int);
1552 struct pcap_stat stats;
1555 gboolean cfilter_error = FALSE;
1556 char errmsg[1024+1];
1557 char secondary_errmsg[4096+1];
1560 /* Initialize all data structures used for dissection. */
1563 ld.wtap_linktype = WTAP_ENCAP_UNKNOWN;
1565 ld.packet_cb = capture_pcap_cb;
1568 /* open the "input file" from network interface or capture pipe */
1569 if (!capture_loop_open_input(&capture_opts, &ld, errmsg, sizeof(errmsg),
1570 secondary_errmsg, sizeof(secondary_errmsg))) {
1575 * We've opened the capture device, so we shouldn't need any special
1576 * privileges any more; relinquish those privileges.
1578 * XXX - if we have saved set-user-ID support, we should give up those
1579 * privileges immediately, and then reclaim them long enough to get
1580 * a list of network interfaces and to open one, and then give them
1581 * up again, so that stuff we do while processing the argument list,
1582 * reading the user's preferences, loading and starting plugins
1583 * (especially *user* plugins), etc. is done with the user's privileges,
1584 * not special privileges.
1586 relinquish_special_privs_perm();
1588 /* init the input filter from the network interface (capture pipe will do nothing) */
1589 switch (capture_loop_init_filter(ld.pcap_h, ld.from_cap_pipe, capture_opts.iface, capture_opts.cfilter)) {
1591 case INITFILTER_NO_ERROR:
1594 case INITFILTER_BAD_FILTER:
1595 cfilter_error = TRUE;
1596 g_snprintf(errmsg, sizeof(errmsg), "%s", pcap_geterr(ld.pcap_h));
1597 *secondary_errmsg = '\0';
1600 case INITFILTER_OTHER_ERROR:
1601 g_snprintf(errmsg, sizeof(errmsg), "Can't install filter (%s).",
1602 pcap_geterr(ld.pcap_h));
1603 g_snprintf(secondary_errmsg, sizeof(secondary_errmsg), "%s", please_report);
1607 if (capture_opts.saving_to_file) {
1608 /* open the output file (temporary/specified name/ringbuffer/named pipe/stdout) */
1609 if (!capture_loop_open_output(&capture_opts, &save_file_fd, errmsg, sizeof(errmsg))) {
1610 *secondary_errmsg = '\0';
1614 /* set up to write to the already-opened capture output file/files */
1615 if(!capture_loop_init_output(&capture_opts, save_file_fd, &ld, errmsg, sizeof errmsg)) {
1616 *secondary_errmsg = '\0';
1620 /* Save the capture file name. */
1621 ld.save_file = capture_opts.save_file;
1624 ld.wtap_linktype = wtap_pcap_encap_to_wtap_encap(ld.linktype);
1627 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1628 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1630 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1632 XXX - deal with signal semantics on various UNIX platforms. Or just
1633 use "sigaction()" and be done with it? */
1634 signal(SIGTERM, capture_cleanup);
1635 signal(SIGINT, capture_cleanup);
1636 if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
1637 signal(SIGHUP, oldhandler);
1640 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1641 quiet mode, report the number of packets we've captured. */
1642 signal(SIGINFO, report_counts_siginfo);
1643 #endif /* SIGINFO */
1646 /* Let the user know what interface was chosen. */
1647 descr = get_interface_descriptive_name(capture_opts.iface);
1648 fprintf(stderr, "Capturing on %s\n", descr);
1651 /* initialize capture stop conditions */
1652 init_capture_stop_conditions();
1653 /* create stop conditions */
1654 if (capture_opts.has_autostop_filesize)
1655 cnd_autostop_size = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
1656 (long)capture_opts.autostop_filesize * 1024);
1657 if (capture_opts.has_autostop_duration)
1658 cnd_autostop_duration = cnd_new((const char*)CND_CLASS_TIMEOUT,
1659 (gint32)capture_opts.autostop_duration);
1661 if (capture_opts.multi_files_on && capture_opts.has_file_duration)
1662 cnd_file_duration = cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
1664 if (!setjmp(ld.stopenv)) {
1666 ld.packet_count = 0;
1671 /* We need to be careful with automatic variables defined in the
1672 outer scope which are changed inside the loop. Most compilers
1673 don't try to roll them back to their original values after the
1674 longjmp which causes the loop to finish, but all that the
1675 standards say is that their values are indeterminate. If we
1676 don't want them to be rolled back, we should define them with the
1677 volatile attribute (paraphrasing W. Richard Stevens, Advanced
1678 Programming in the UNIX Environment, p. 178).
1680 The "err" variable causes a particular problem. If we give it
1681 the volatile attribute, then when we pass a reference to it (as
1682 in "&err") to a function, GCC warns: "passing arg <n> of
1683 <function> discards qualifiers from pointer target type".
1684 Therefore within the loop and just beyond we don't use "err".
1685 Within the loop we define "loop_err", and assign its value to
1686 "volatile_err", which is in the outer scope and is checked when
1689 We also define "packet_count_prev" here to keep things tidy,
1690 since it's used only inside the loop. If it were defined in the
1691 outer scope, GCC would give a warning (unnecessary in this case)
1692 that it might be clobbered, and we'd need to give it the volatile
1693 attribute to suppress the warning. */
1696 int packet_count_prev = 0;
1698 if (cnd_autostop_size == NULL && cnd_autostop_duration == NULL) {
1699 /* We're not stopping at a particular capture file size, and we're
1700 not stopping after some particular amount of time has expired,
1701 so either we have no stop condition or the only stop condition
1702 is a maximum packet count.
1704 If there's no maximum packet count, pass it -1, meaning "until
1705 you run out of packets in the bufferful you read". Otherwise,
1706 pass it the number of packets we have left to capture.
1708 We don't call "pcap_loop()" as, if we're saving to a file that's
1709 a FIFO, we want to flush the FIFO after we're done processing
1710 this libpcap bufferful of packets, so that the program
1711 reading the FIFO sees the packets immediately and doesn't get
1712 any partial packet, forcing it to block in the middle of reading
1714 if (capture_opts.autostop_packets == 0)
1717 if (ld.packet_count >= capture_opts.autostop_packets) {
1718 /* XXX do we need this test here? */
1719 /* It appears there's nothing more to capture. */
1722 pcap_cnt = capture_opts.autostop_packets - ld.packet_count;
1725 /* We need to check the capture file size or the timeout after
1730 inpkts = capture_loop_dispatch(NULL, &ld, errmsg, sizeof errmsg);
1732 /* Error from "pcap_dispatch()", or error or "no more packets" from
1733 "cap_pipe_dispatch(). */
1735 } else if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
1736 /* The specified capture time has elapsed; stop the capture. */
1738 } else if (inpkts > 0) {
1739 if (capture_opts.autostop_packets != 0 &&
1740 ld.packet_count >= capture_opts.autostop_packets) {
1741 /* The specified number of packets have been captured and have
1742 passed both any capture filter in effect and any read filter
1745 } else if (cnd_autostop_size != NULL &&
1746 cnd_eval(cnd_autostop_size, (guint32)ld.bytes_written)) {
1747 /* We're saving the capture to a file, and the capture file reached
1748 its maximum size. */
1749 if (capture_opts.multi_files_on) {
1750 /* Switch to the next ringbuffer file */
1751 if (ringbuf_switch_file(&ld.pdh, &capture_opts.save_file,
1752 &save_file_fd, &ld.bytes_written,
1754 /* File switch succeeded: reset the condition */
1755 cnd_reset(cnd_autostop_size);
1756 if (cnd_file_duration) {
1757 cnd_reset(cnd_file_duration);
1760 /* File switch failed: stop here */
1761 volatile_err = loop_err;
1765 /* No ringbuffer - just stop. */
1769 if (capture_opts.output_to_pipe) {
1770 if (ld.packet_count > packet_count_prev) {
1771 libpcap_dump_flush(ld.pdh, NULL);
1772 packet_count_prev = ld.packet_count;
1776 } /* while (ld.go) */
1778 /* delete stop conditions */
1779 if (cnd_autostop_size != NULL)
1780 cnd_delete(cnd_autostop_size);
1781 if (cnd_autostop_duration != NULL)
1782 cnd_delete(cnd_autostop_duration);
1783 if (cnd_file_duration != NULL)
1784 cnd_delete(cnd_file_duration);
1786 if (print_packet_counts) {
1787 /* We're printing packet counts to stderr.
1788 Send a newline so that we move to the line after the packet count. */
1789 fprintf(stderr, "\n");
1792 /* If we got an error while capturing, report it. */
1794 if (ld.from_cap_pipe) {
1795 if (ld.cap_pipe_err == PIPERR) {
1796 cmdarg_err("Error while capturing packets: %s", errmsg);
1799 cmdarg_err("Error while capturing packets: %s", pcap_geterr(ld.pcap_h));
1803 if (volatile_err == 0)
1806 show_capture_file_io_error(capture_opts.save_file, volatile_err, FALSE);
1810 if (capture_opts.save_file != NULL) {
1811 /* We're saving to a file or files; close all files. */
1812 close_ok = capture_loop_close_output(&capture_opts, &ld, &err);
1814 /* If we've displayed a message about a write error, there's no point
1815 in displaying another message about an error on close. */
1816 if (!close_ok && write_ok)
1817 show_capture_file_io_error(capture_opts.save_file, err, TRUE);
1820 if (ld.from_cap_pipe && ld.cap_pipe_fd >= 0)
1821 eth_close(ld.cap_pipe_fd);
1823 /* Get the capture statistics, and, if any packets were dropped, report
1825 if (pcap_stats(ld.pcap_h, &stats) >= 0) {
1826 if (stats.ps_drop != 0) {
1827 fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
1830 cmdarg_err("Can't get packet-drop statistics: %s", pcap_geterr(ld.pcap_h));
1832 pcap_close(ld.pcap_h);
1835 /* Report the number of captured packets if not reported during capture
1836 and we are saving to a file. */
1842 if (capture_opts.multi_files_on) {
1843 ringbuf_error_cleanup();
1845 g_free(capture_opts.save_file);
1846 capture_opts.save_file = NULL;
1847 if (cfilter_error) {
1848 dfilter_t *rfcode = NULL;
1849 if (dfilter_compile(capture_opts.cfilter, &rfcode) && rfcode != NULL) {
1851 "Invalid capture filter: \"%s\"!\n"
1853 "That string looks like a valid display filter; however, it isn't a valid\n"
1854 "capture filter (%s).\n"
1856 "Note that display filters and capture filters don't have the same syntax,\n"
1857 "so you can't use most display filter expressions as capture filters.\n"
1859 "See the User's Guide for a description of the capture filter syntax.",
1860 capture_opts.cfilter, errmsg);
1861 dfilter_free(rfcode);
1864 "Invalid capture filter: \"%s\"!\n"
1866 "That string isn't a valid capture filter (%s).\n"
1867 "See the User's Guide for a description of the capture filter syntax.",
1868 capture_opts.cfilter, errmsg);
1871 cmdarg_err("%s", errmsg);
1872 if (*secondary_errmsg != '\0') {
1873 fprintf(stderr, "\n");
1874 cmdarg_err_cont("%s", secondary_errmsg);
1877 if (ld.from_cap_pipe) {
1878 if (ld.cap_pipe_fd >= 0)
1879 eth_close(ld.cap_pipe_fd);
1881 if (ld.pcap_h != NULL)
1882 pcap_close(ld.pcap_h);
1889 capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
1892 struct wtap_pkthdr whdr;
1893 union wtap_pseudo_header pseudo_header;
1894 const guchar *wtap_pd;
1895 loop_data *ld = (loop_data *) user;
1899 gboolean packet_accepted;
1903 * Prevent a SIGINFO handler from writing to stdout while we're
1904 * doing so; instead, have it just set a flag telling us to print
1905 * that information when we're done.
1908 #endif /* SIGINFO */
1910 /* The current packet may have arrived after a very long silence,
1911 * way past the time to switch files. In order not to have
1912 * the first packet of a new series of events as the last
1913 * [or only] packet in the file, switch before writing!
1915 if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
1916 /* time elapsed for this ring file, switch to the next */
1917 if (ringbuf_switch_file(&ld->pdh, &ld->save_file, &save_file_fd,
1918 &ld->bytes_written, &loop_err)) {
1919 /* File switch succeeded: reset the condition */
1920 cnd_reset(cnd_file_duration);
1922 /* File switch failed: stop here */
1923 /* XXX - we should do something with "loop_err" */
1928 if (do_dissection) {
1929 /* We're goint to print packet information, run a read filter, or
1930 process taps. Use process_packet() to handle that; in order
1931 to do that, we need to convert from libpcap to Wiretap format.
1932 If that fails, ignore the packet (wtap_process_pcap_packet has
1933 written an error message). */
1934 wtap_pd = wtap_process_pcap_packet(ld->wtap_linktype, phdr, pd,
1935 &pseudo_header, &whdr, &err);
1936 if (wtap_pd == NULL)
1939 packet_accepted = process_packet(&cfile, 0, &whdr, &pseudo_header, wtap_pd);
1941 /* We're just writing out packets. */
1942 packet_accepted = TRUE;
1945 if (packet_accepted) {
1946 /* Count this packet. */
1951 if (ld->pdh != NULL) {
1952 if (!libpcap_write_packet(ld->pdh, phdr, pd, &ld->bytes_written, &err)) {
1953 /* Error writing to a capture file */
1954 if (print_packet_counts) {
1955 /* We're printing counts of packets captured; move to the line after
1957 fprintf(stderr, "\n");
1959 show_capture_file_io_error(ld->save_file, err, FALSE);
1960 pcap_close(ld->pcap_h);
1961 libpcap_dump_close(ld->pdh, &err);
1965 if (print_packet_counts) {
1966 /* We're printing packet counts. */
1967 if (ld->packet_count != 0) {
1968 fprintf(stderr, "\r%u ", ld->packet_count);
1969 /* stderr could be line buffered */
1977 * Allow SIGINFO handlers to write.
1982 * If a SIGINFO handler asked us to write out capture counts, do so.
1986 #endif /* SIGINFO */
1991 capture_cleanup(DWORD ctrltype _U_)
1993 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
1994 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
1995 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
1996 like SIGTERM at least when the machine's shutting down.
1998 For now, we handle them all as indications that we should clean up
1999 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2002 However, as handlers run in a new thread, we can't just longjmp
2003 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2004 no other handler - such as one that would terminate the process -
2007 XXX - for some reason, typing ^C to TShark, if you run this in
2008 a Cygwin console window in at least some versions of Cygwin,
2009 causes TShark to terminate immediately; this routine gets
2010 called, but the main loop doesn't get a chance to run and
2011 exit cleanly, at least if this is compiled with Microsoft Visual
2012 C++ (i.e., it's a property of the Cygwin console window or Bash;
2013 it happens if TShark is not built with Cygwin - for all I know,
2014 building it with Cygwin may make the problem go away). */
2020 capture_cleanup(int signum _U_)
2022 /* Longjmp back to the starting point; "pcap_dispatch()", on many
2023 UNIX platforms, just keeps looping if it gets EINTR, so if we set
2024 "ld.go" to FALSE and return, we won't break out of it and quit
2026 longjmp(ld.stopenv, 1);
2034 /* XXX - if we use sigaction, this doesn't have to be done.
2035 (Yes, this isn't necessary on BSD, but just in case a system
2036 where "signal()" has AT&T semantics adopts SIGINFO....) */
2037 signal(SIGINFO, report_counts_siginfo);
2038 #endif /* SIGINFO */
2040 if (!print_packet_counts) {
2041 /* Report the count only if we aren't printing a packet count
2042 as packets arrive. */
2043 fprintf(stderr, "%u packets captured\n", ld.packet_count);
2046 infoprint = FALSE; /* we just reported it */
2047 #endif /* SIGINFO */
2052 report_counts_siginfo(int signum _U_)
2054 int sav_errno = errno;
2055 /* If we've been told to delay printing, just set a flag asking
2056 that we print counts (if we're supposed to), otherwise print
2057 the count of packets captured (if we're supposed to). */
2064 #endif /* SIGINFO */
2065 #endif /* HAVE_LIBPCAP */
2068 load_cap_file(capture_file *cf, char *save_file, int out_file_type)
2071 int snapshot_length;
2076 char *save_file_string = NULL;
2078 linktype = wtap_file_encap(cf->wth);
2079 if (save_file != NULL) {
2080 /* Get a string that describes what we're writing to */
2081 save_file_string = output_file_description(save_file);
2083 /* Set up to write to the capture file. */
2084 snapshot_length = wtap_snapshot_length(cf->wth);
2085 if (snapshot_length == 0) {
2086 /* Snapshot length of input file not known. */
2087 snapshot_length = WTAP_MAX_PACKET_SIZE;
2089 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2090 FALSE /* compressed */, &err);
2093 /* We couldn't set up to write to the capture file. */
2096 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2097 cmdarg_err("Capture files can't be written in that format.");
2100 case WTAP_ERR_UNSUPPORTED_ENCAP:
2101 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2102 cmdarg_err("The capture file being read can't be written in "
2106 case WTAP_ERR_CANT_OPEN:
2107 cmdarg_err("The %s couldn't be created for some "
2108 "unknown reason.", save_file_string);
2111 case WTAP_ERR_SHORT_WRITE:
2112 cmdarg_err("A full header couldn't be written to the %s.",
2117 cmdarg_err("The %s could not be created: %s.", save_file_string,
2118 wtap_strerror(err));
2124 if (print_packet_info) {
2125 if (!write_preamble(cf)) {
2127 show_print_file_io_error(err);
2133 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2134 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2135 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2136 /* Either there's no read filtering or this packet passed the
2137 filter, so, if we're writing to a capture file, write
2140 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2141 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2143 /* Error writing to a capture file */
2144 show_capture_file_io_error(save_file, err, FALSE);
2145 wtap_dump_close(pdh, &err);
2152 /* Print a message noting that the read failed somewhere along the line. */
2155 case WTAP_ERR_UNSUPPORTED_ENCAP:
2156 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2157 cf->filename, err_info);
2160 case WTAP_ERR_CANT_READ:
2161 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2165 case WTAP_ERR_SHORT_READ:
2166 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2170 case WTAP_ERR_BAD_RECORD:
2171 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2172 cf->filename, err_info);
2176 cmdarg_err("An error occurred while reading \"%s\": %s.",
2177 cf->filename, wtap_strerror(err));
2180 if (save_file != NULL) {
2181 /* Now close the capture file. */
2182 if (!wtap_dump_close(pdh, &err))
2183 show_capture_file_io_error(save_file, err, TRUE);
2186 if (save_file != NULL) {
2187 /* Now close the capture file. */
2188 if (!wtap_dump_close(pdh, &err))
2189 show_capture_file_io_error(save_file, err, TRUE);
2191 if (print_packet_info) {
2192 if (!write_finale()) {
2194 show_print_file_io_error(err);
2201 wtap_close(cf->wth);
2204 if (save_file_string != NULL)
2205 g_free(save_file_string);
2211 fill_in_fdata(frame_data *fdata, capture_file *cf,
2212 const struct wtap_pkthdr *phdr, gint64 offset)
2217 fdata->num = cf->count;
2218 fdata->pkt_len = phdr->len;
2219 cum_bytes += phdr->len;
2220 fdata->cum_bytes = cum_bytes;
2221 fdata->cap_len = phdr->caplen;
2222 fdata->file_off = offset;
2223 fdata->lnk_t = phdr->pkt_encap;
2224 fdata->abs_ts = *((nstime_t *) &phdr->ts);
2225 fdata->flags.passed_dfilter = 0;
2226 fdata->flags.encoding = CHAR_ASCII;
2227 fdata->flags.visited = 0;
2228 fdata->flags.marked = 0;
2229 fdata->flags.ref_time = 0;
2230 fdata->color_filter = NULL;
2232 /* If we don't have the time stamp of the first packet in the
2233 capture, it's because this is the first packet. Save the time
2234 stamp of this packet as the time stamp of the first packet. */
2235 if (nstime_is_zero(&first_ts)) {
2236 first_ts = fdata->abs_ts;
2239 /* If we don't have the time stamp of the previous displayed packet,
2240 it's because this is the first displayed packet. Save the time
2241 stamp of this packet as the time stamp of the previous displayed
2243 if (nstime_is_zero(&prev_ts)) {
2244 prev_ts = fdata->abs_ts;
2247 /* Get the time elapsed between the first packet and this packet. */
2248 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2250 /* If it's greater than the current elapsed time, set the elapsed time
2251 to it (we check for "greater than" so as not to be confused by
2252 time moving backwards). */
2253 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2254 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2255 cf->elapsed_time = fdata->rel_ts;
2258 /* Get the time elapsed between the previous displayed packet and
2260 nstime_delta(&fdata->del_ts, &fdata->abs_ts, &prev_ts);
2261 prev_ts = fdata->abs_ts;
2264 /* Free up all data attached to a "frame_data" structure. */
2266 clear_fdata(frame_data *fdata)
2269 g_slist_free(fdata->pfd);
2273 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2274 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2277 gboolean create_proto_tree;
2278 epan_dissect_t *edt;
2281 /* Count this packet. */
2284 /* If we're going to print packet information, or we're going to
2285 run a read filter, or we're going to process taps, set up to
2286 do a dissection and do so. */
2287 if (do_dissection) {
2288 fill_in_fdata(&fdata, cf, whdr, offset);
2290 if (print_packet_info) {
2291 /* Grab any resolved addresses */
2293 if (g_resolv_flags) {
2294 host_name_lookup_process(NULL);
2299 if (cf->rfcode || verbose || num_tap_filters!=0)
2300 create_proto_tree = TRUE;
2302 create_proto_tree = FALSE;
2303 /* The protocol tree will be "visible", i.e., printed, only if we're
2304 printing packet details, which is true if we're printing stuff
2305 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2307 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2309 /* If we're running a read filter, prime the epan_dissect_t with that
2312 epan_dissect_prime_dfilter(edt, cf->rfcode);
2314 tap_queue_init(edt);
2316 /* We only need the columns if we're printing packet info but we're
2317 *not* verbose; in verbose mode, we print the protocol tree, not
2318 the protocol summary. */
2319 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2320 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2322 tap_push_tapped_queue(edt);
2324 /* Run the read filter if we have one. */
2326 passed = dfilter_apply_edt(cf->rfcode, edt);
2330 /* We're not running a display filter and we're not printing any
2331 packet information, so we don't need to do a dissection, and all
2332 packets are processed. */
2338 /* Process this packet. */
2339 if (print_packet_info) {
2340 /* We're printing packet information; print the information for
2342 print_packet(cf, edt);
2344 /* The ANSI C standard does not appear to *require* that a line-buffered
2345 stream be flushed to the host environment whenever a newline is
2346 written, it just says that, on such a stream, characters "are
2347 intended to be transmitted to or from the host environment as a
2348 block when a new-line character is encountered".
2350 The Visual C++ 6.0 C implementation doesn't do what is intended;
2351 even if you set a stream to be line-buffered, it still doesn't
2352 flush the buffer at the end of every line.
2354 So, if the "-l" flag was specified, we flush the standard output
2355 at the end of a packet. This will do the right thing if we're
2356 printing packet summary lines, and, as we print the entire protocol
2357 tree for a single packet without waiting for anything to happen,
2358 it should be as good as line-buffered mode if we're printing
2359 protocol trees. (The whole reason for the "-l" flag in either
2360 tcpdump or TShark is to allow the output of a live capture to
2361 be piped to a program or script and to have that script see the
2362 information for the packet as soon as it's printed, rather than
2363 having to wait until a standard I/O buffer fills up. */
2367 if (ferror(stdout)) {
2368 show_print_file_io_error(errno);
2374 if (do_dissection) {
2375 epan_dissect_free(edt);
2376 clear_fdata(&fdata);
2382 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2384 char *save_file_string;
2386 save_file_string = output_file_description(fname);
2391 cmdarg_err("Not all the packets could be written to the %s because there is "
2392 "no space left on the file system.",
2398 cmdarg_err("Not all the packets could be written to the %s because you are "
2399 "too close to, or over your disk quota.",
2404 case WTAP_ERR_CANT_CLOSE:
2405 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2409 case WTAP_ERR_SHORT_WRITE:
2410 cmdarg_err("Not all the packets could be written to the %s.",
2416 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2417 wtap_strerror(err));
2419 cmdarg_err("An error occurred while writing to the %s: %s.",
2420 save_file_string, wtap_strerror(err));
2424 g_free(save_file_string);
2428 write_preamble(capture_file *cf)
2430 switch (output_action) {
2433 return print_preamble(print_stream, cf->filename);
2438 write_pdml_preamble(stdout);
2440 write_psml_preamble(stdout);
2441 return !ferror(stdout);
2444 g_assert_not_reached();
2450 get_line_buf(size_t len)
2452 static char *line_bufp = NULL;
2453 static size_t line_buf_len = 256;
2454 size_t new_line_buf_len;
2456 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2457 new_line_buf_len *= 2)
2459 if (line_bufp == NULL) {
2460 line_buf_len = new_line_buf_len;
2461 line_bufp = g_malloc(line_buf_len + 1);
2463 if (new_line_buf_len > line_buf_len) {
2464 line_buf_len = new_line_buf_len;
2465 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2472 print_columns(capture_file *cf)
2479 line_bufp = get_line_buf(256);
2482 for (i = 0; i < cf->cinfo.num_cols; i++) {
2483 switch (cf->cinfo.col_fmt[i]) {
2487 * Don't print this if we're doing a live capture from a network
2488 * interface - if we're doing a live capture, you won't be
2489 * able to look at the capture in the future (it's not being
2490 * saved anywhere), so the frame numbers are unlikely to be
2493 * (XXX - it might be nice to be able to save and print at
2494 * the same time, sort of like an "Update list of packets
2495 * in real time" capture in Wireshark.)
2497 if (capture_opts.iface != NULL)
2500 column_len = strlen(cf->cinfo.col_data[i]);
2503 line_bufp = get_line_buf(buf_offset + column_len);
2504 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2510 case COL_ABS_DATE_TIME: /* XXX - wider */
2511 column_len = strlen(cf->cinfo.col_data[i]);
2512 if (column_len < 10)
2514 line_bufp = get_line_buf(buf_offset + column_len);
2515 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2521 case COL_DEF_DL_SRC:
2522 case COL_RES_DL_SRC:
2523 case COL_UNRES_DL_SRC:
2524 case COL_DEF_NET_SRC:
2525 case COL_RES_NET_SRC:
2526 case COL_UNRES_NET_SRC:
2527 column_len = strlen(cf->cinfo.col_data[i]);
2528 if (column_len < 12)
2530 line_bufp = get_line_buf(buf_offset + column_len);
2531 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2537 case COL_DEF_DL_DST:
2538 case COL_RES_DL_DST:
2539 case COL_UNRES_DL_DST:
2540 case COL_DEF_NET_DST:
2541 case COL_RES_NET_DST:
2542 case COL_UNRES_NET_DST:
2543 column_len = strlen(cf->cinfo.col_data[i]);
2544 if (column_len < 12)
2546 line_bufp = get_line_buf(buf_offset + column_len);
2547 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2551 column_len = strlen(cf->cinfo.col_data[i]);
2552 line_bufp = get_line_buf(buf_offset + column_len);
2553 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2556 buf_offset += column_len;
2557 if (i != cf->cinfo.num_cols - 1) {
2559 * This isn't the last column, so we need to print a
2560 * separator between this column and the next.
2562 * If we printed a network source and are printing a
2563 * network destination of the same type next, separate
2564 * them with "->"; if we printed a network destination
2565 * and are printing a network source of the same type
2566 * next, separate them with "<-"; otherwise separate them
2569 * We add enough space to the buffer for " <- " or " -> ",
2570 * even if we're only adding " ".
2572 line_bufp = get_line_buf(buf_offset + 4);
2573 switch (cf->cinfo.col_fmt[i]) {
2578 switch (cf->cinfo.col_fmt[i + 1]) {
2583 strcat(line_bufp + buf_offset, " -> ");
2588 strcat(line_bufp + buf_offset, " ");
2594 case COL_DEF_DL_SRC:
2595 case COL_RES_DL_SRC:
2596 case COL_UNRES_DL_SRC:
2597 switch (cf->cinfo.col_fmt[i + 1]) {
2599 case COL_DEF_DL_DST:
2600 case COL_RES_DL_DST:
2601 case COL_UNRES_DL_DST:
2602 strcat(line_bufp + buf_offset, " -> ");
2607 strcat(line_bufp + buf_offset, " ");
2613 case COL_DEF_NET_SRC:
2614 case COL_RES_NET_SRC:
2615 case COL_UNRES_NET_SRC:
2616 switch (cf->cinfo.col_fmt[i + 1]) {
2618 case COL_DEF_NET_DST:
2619 case COL_RES_NET_DST:
2620 case COL_UNRES_NET_DST:
2621 strcat(line_bufp + buf_offset, " -> ");
2626 strcat(line_bufp + buf_offset, " ");
2635 switch (cf->cinfo.col_fmt[i + 1]) {
2640 strcat(line_bufp + buf_offset, " <- ");
2645 strcat(line_bufp + buf_offset, " ");
2651 case COL_DEF_DL_DST:
2652 case COL_RES_DL_DST:
2653 case COL_UNRES_DL_DST:
2654 switch (cf->cinfo.col_fmt[i + 1]) {
2656 case COL_DEF_DL_SRC:
2657 case COL_RES_DL_SRC:
2658 case COL_UNRES_DL_SRC:
2659 strcat(line_bufp + buf_offset, " <- ");
2664 strcat(line_bufp + buf_offset, " ");
2670 case COL_DEF_NET_DST:
2671 case COL_RES_NET_DST:
2672 case COL_UNRES_NET_DST:
2673 switch (cf->cinfo.col_fmt[i + 1]) {
2675 case COL_DEF_NET_SRC:
2676 case COL_RES_NET_SRC:
2677 case COL_UNRES_NET_SRC:
2678 strcat(line_bufp + buf_offset, " <- ");
2683 strcat(line_bufp + buf_offset, " ");
2690 strcat(line_bufp + buf_offset, " ");
2696 return print_line(print_stream, 0, line_bufp);
2700 print_packet(capture_file *cf, epan_dissect_t *edt)
2702 print_args_t print_args;
2705 /* Print the information in the protocol tree. */
2706 switch (output_action) {
2709 print_args.to_file = TRUE;
2710 print_args.format = print_format;
2711 print_args.print_summary = !verbose;
2712 print_args.print_hex = verbose && print_hex;
2713 print_args.print_formfeed = FALSE;
2714 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2716 /* init the packet range */
2717 packet_range_init(&print_args.range);
2719 if (!proto_tree_print(&print_args, edt, print_stream))
2722 /* "print_hex_data()" will put out a leading blank line, as well
2723 as a trailing one; print one here, to separate the packets,
2724 only if "print_hex_data()" won't be called. */
2725 if (!print_line(print_stream, 0, ""))
2731 proto_tree_write_pdml(edt, stdout);
2733 return !ferror(stdout);
2736 /* Just fill in the columns. */
2737 epan_dissect_fill_in_columns(edt);
2739 /* Now print them. */
2740 switch (output_action) {
2743 if (!print_columns(cf))
2748 proto_tree_write_psml(edt, stdout);
2749 return !ferror(stdout);
2753 if (!print_hex_data(print_stream, edt))
2755 if (!print_line(print_stream, 0, ""))
2764 switch (output_action) {
2767 return print_finale(print_stream);
2772 write_pdml_finale(stdout);
2774 write_psml_finale(stdout);
2775 return !ferror(stdout);
2778 g_assert_not_reached();
2784 show_print_file_io_error(int err)
2789 cmdarg_err("Not all the packets could be printed because there is "
2790 "no space left on the file system.");
2795 cmdarg_err("Not all the packets could be printed because you are "
2796 "too close to, or over your disk quota.");
2801 cmdarg_err("An error occurred while printing packets: %s.",
2808 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2812 static char errmsg_errno[1024+1];
2815 /* Wiretap error. */
2818 case WTAP_ERR_NOT_REGULAR_FILE:
2819 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2822 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2823 /* Seen only when opening a capture file for reading. */
2824 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2827 case WTAP_ERR_UNSUPPORTED:
2828 /* Seen only when opening a capture file for reading. */
2829 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2830 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2833 errmsg = errmsg_errno;
2836 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2837 /* Seen only when opening a capture file for writing. */
2838 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2839 "The file \"%%s\" is a pipe, and %s capture files can't be "
2840 "written to a pipe.", wtap_file_type_string(file_type));
2841 errmsg = errmsg_errno;
2844 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2845 /* Seen only when opening a capture file for writing. */
2846 errmsg = "TShark doesn't support writing capture files in that format.";
2849 case WTAP_ERR_UNSUPPORTED_ENCAP:
2851 errmsg = "TShark can't save this capture in that format.";
2853 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2854 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2857 errmsg = errmsg_errno;
2861 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2863 errmsg = "TShark can't save this capture in that format.";
2865 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
2868 case WTAP_ERR_BAD_RECORD:
2869 /* Seen only when opening a capture file for reading. */
2870 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2871 "The file \"%%s\" appears to be damaged or corrupt.\n"
2874 errmsg = errmsg_errno;
2877 case WTAP_ERR_CANT_OPEN:
2879 errmsg = "The file \"%s\" could not be created for some unknown reason.";
2881 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
2884 case WTAP_ERR_SHORT_READ:
2885 errmsg = "The file \"%s\" appears to have been cut short"
2886 " in the middle of a packet or other data.";
2889 case WTAP_ERR_SHORT_WRITE:
2890 errmsg = "A full header couldn't be written to the file \"%s\".";
2894 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2895 "The file \"%%s\" could not be %s: %s.",
2896 for_writing ? "created" : "opened",
2897 wtap_strerror(err));
2898 errmsg = errmsg_errno;
2902 errmsg = file_open_error_message(err, for_writing);
2907 * Open/create errors are reported with an console message in TShark.
2910 open_failure_message(const char *filename, int err, gboolean for_writing)
2912 fprintf(stderr, "tshark: ");
2913 fprintf(stderr, file_open_error_message(err, for_writing), filename);
2914 fprintf(stderr, "\n");
2918 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
2922 char err_msg[2048+1];
2924 wth = wtap_open_offline(fname, err, &err_info, FALSE);
2928 /* The open succeeded. Fill in the information for this file. */
2930 /* Initialize all data structures used for dissection. */
2934 cf->f_datalen = 0; /* not used, but set it anyway */
2936 /* Set the file name because we need it to set the follow stream filter.
2937 XXX - is that still true? We need it for other reasons, though,
2939 cf->filename = g_strdup(fname);
2941 /* Indicate whether it's a permanent or temporary file. */
2942 cf->is_tempfile = is_tempfile;
2944 /* If it's a temporary capture buffer file, mark it as not saved. */
2945 cf->user_saved = !is_tempfile;
2947 cf->cd_t = wtap_file_type(cf->wth);
2949 cf->drops_known = FALSE;
2951 cf->snap = wtap_snapshot_length(cf->wth);
2952 if (cf->snap == 0) {
2953 /* Snapshot length not known. */
2954 cf->has_snap = FALSE;
2955 cf->snap = WTAP_MAX_PACKET_SIZE;
2957 cf->has_snap = TRUE;
2958 nstime_set_zero(&cf->elapsed_time);
2959 nstime_set_zero(&first_ts);
2960 nstime_set_zero(&prev_ts);
2965 g_snprintf(err_msg, sizeof err_msg,
2966 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
2967 cmdarg_err("%s", err_msg);
2973 * General errors are reported with an console message in TShark.
2976 failure_message(const char *msg_format, va_list ap)
2978 fprintf(stderr, "tshark: ");
2979 vfprintf(stderr, msg_format, ap);
2980 fprintf(stderr, "\n");
2984 * Read errors are reported with an console message in TShark.
2987 read_failure_message(const char *filename, int err)
2989 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
2990 filename, strerror(err));
2994 * Report an error in command-line arguments.
2997 cmdarg_err(const char *fmt, ...)
3002 fprintf(stderr, "tshark: ");
3003 vfprintf(stderr, fmt, ap);
3004 fprintf(stderr, "\n");
3009 * Report additional information for an error in command-line arguments.
3012 cmdarg_err_cont(const char *fmt, ...)
3017 vfprintf(stderr, fmt, ap);
3018 fprintf(stderr, "\n");
3023 /****************************************************************************************************************/
3024 /* indication report "dummies", needed for capture_loop.c */
3028 /** Report a new capture file having been opened. */
3030 report_new_capture_file(const char *filename)
3032 /* shouldn't happen */
3033 g_assert_not_reached();
3036 /** Report a number of new packets captured. */
3038 report_packet_count(int packet_count)
3040 /* shouldn't happen */
3041 g_assert_not_reached();
3044 /** Report the packet drops once the capture finishes. */
3046 report_packet_drops(int drops)
3048 /* shouldn't happen */
3049 g_assert_not_reached();
3052 /** Report an error in the capture. */
3054 report_capture_error(const char *errmsg, const char *secondary_error_msg)
3057 cmdarg_err_cont(secondary_error_msg);
3060 /** Report an error with a capture filter. */
3062 report_cfilter_error(const char *cfilter, const char *errmsg)
3066 "Invalid capture filter: \"%s\"!\n"
3068 "That string isn't a valid capture filter (%s).\n"
3069 "See the User's Guide for a description of the capture filter syntax.",
3073 #endif /* HAVE_LIBPCAP */
3076 /****************************************************************************************************************/
3077 /* signal pipe "dummies", needed for capture_loop.c */
3083 signal_pipe_check_running(void)
3085 /* currently, no check required */
3090 #endif /* HAVE_LIBPCAP */