3 * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
4 * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
63 #include <epan/epan.h>
64 #include <epan/filesystem.h>
65 #include <wsutil/privileges.h>
68 #include <epan/timestamp.h>
69 #include <epan/packet.h>
71 #include "disabled_protos.h"
72 #include <epan/prefs.h>
73 #include <epan/column.h>
75 #include <epan/addr_resolv.h>
77 #include "clopts_common.h"
78 #include "cmdarg_err.h"
79 #include "version_info.h"
80 #include <epan/plugins.h>
82 #include <epan/epan_dissect.h>
84 #include <epan/stat_cmd_args.h>
85 #include <epan/timestamp.h>
86 #include <epan/ex-opt.h>
89 #include "capture_ui_utils.h"
91 #include "capture-pcap-util.h"
93 #include "capture-wpcap.h"
94 #include "capture_errs.h"
96 #include "capture_sync.h"
97 #endif /* HAVE_LIBPCAP */
99 #include <epan/funnel.h>
103 * This is the template for the decode as option; it is shared between the
104 * various functions that output the usage for this parameter.
106 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
108 static guint32 cum_bytes;
109 static nstime_t first_ts;
110 static nstime_t prev_dis_ts;
111 static nstime_t prev_cap_ts;
113 static gboolean print_packet_info; /* TRUE if we're to print packet information */
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
125 static output_action_e output_action;
126 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
127 static gboolean verbose;
128 static gboolean print_hex;
129 static gboolean line_buffered;
131 static print_format_e print_format = PR_FMT_TEXT;
132 static print_stream_t *print_stream;
134 static output_fields_t* output_fields = NULL;
137 * Standard secondary message for unexpected errors.
139 static const char please_report[] =
140 "Please report this to the Wireshark developers";
144 * TRUE if we're to print packet counts to keep track of captured packets.
146 static gboolean print_packet_counts;
149 static capture_options global_capture_opts;
152 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
153 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
156 static int capture(void);
157 static void report_counts(void);
159 static BOOL WINAPI capture_cleanup(DWORD);
161 static void capture_cleanup(int);
163 static void report_counts_siginfo(int);
166 #endif /* HAVE_LIBPCAP */
168 static int load_cap_file(capture_file *, char *, int, int, gint64);
169 static gboolean process_packet(capture_file *cf, gint64 offset,
170 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
171 const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
172 static void show_capture_file_io_error(const char *, int, gboolean);
173 static void show_print_file_io_error(int err);
174 static gboolean write_preamble(capture_file *cf);
175 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
176 static gboolean write_finale(void);
177 static const char *cf_open_error_message(int err, gchar *err_info,
178 gboolean for_writing, int file_type);
180 static void open_failure_message(const char *filename, int err,
181 gboolean for_writing);
182 static void failure_message(const char *msg_format, va_list ap);
183 static void read_failure_message(const char *filename, int err);
184 static void write_failure_message(const char *filename, int err);
186 extern frame_data_init(frame_data *fdata, capture_file *cf,
187 const struct wtap_pkthdr *phdr, gint64 offset,
190 nstime_t *prev_dis_ts,
191 nstime_t *prev_cap_ts);
196 cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
198 g_assert_not_reached();
201 static void list_capture_types(void) {
204 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
205 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
206 if (wtap_dump_can_open(i))
207 fprintf(stderr, " %s - %s\n",
208 wtap_file_type_short_string(i), wtap_file_type_string(i));
213 print_usage(gboolean print_ver)
220 "TShark " VERSION "%s\n"
221 "Dump and analyze network traffic.\n"
222 "See http://www.wireshark.org for more information.\n"
225 wireshark_svnversion, get_copyright_info());
229 fprintf(output, "\n");
230 fprintf(output, "Usage: tshark [options] ...\n");
231 fprintf(output, "\n");
234 fprintf(output, "Capture interface:\n");
235 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
236 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
237 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
238 fprintf(output, " -p don't capture in promiscuous mode\n");
240 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
242 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
243 fprintf(output, " -D print list of interfaces and exit\n");
244 fprintf(output, " -L print list of link-layer types of iface and exit\n");
245 fprintf(output, "\n");
246 fprintf(output, "Capture stop conditions:\n");
247 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
248 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
249 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
250 fprintf(output, " files:NUM - stop after NUM files\n");
251 /*fprintf(output, "\n");*/
252 fprintf(output, "Capture output:\n");
253 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
254 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
255 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
256 #endif /* HAVE_LIBPCAP */
258 /*fprintf(output, "\n");*/
259 fprintf(output, "Input file:\n");
260 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
262 fprintf(output, "\n");
263 fprintf(output, "Processing:\n");
264 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
265 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
266 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
267 fprintf(output, " -d %s ...\n", decode_as_arg_template);
268 fprintf(output, " \"Decode As\", see the man page for details\n");
269 fprintf(output, " Example: tcp.port==8888,http\n");
271 /*fprintf(output, "\n");*/
272 fprintf(output, "Output:\n");
273 fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
274 fprintf(output, " (or to the standard output for \"-\")\n");
275 fprintf(output, " -C <config profile> start with specified configuration profile\n");
276 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
277 fprintf(output, " an empty \"-F\" option will list the file types\n");
278 fprintf(output, " -V add output of packet tree (Packet Details)\n");
279 fprintf(output, " -S display packets even when writing to a file\n");
280 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
281 fprintf(output, " -T pdml|ps|psml|text|fields\n");
282 fprintf(output, " format of text output (def: text)\n");
283 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
284 fprintf(output, " this option can be repeated to print multiple fields\n");
285 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
286 fprintf(output, " header=y|n switch headers on and off\n");
287 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
288 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
289 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
290 fprintf(output, " -l flush standard output after each packet\n");
291 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
292 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
293 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
295 fprintf(output, "\n");
296 fprintf(output, "Miscellaneous:\n");
297 fprintf(output, " -h display this help and exit\n");
298 fprintf(output, " -v display version info and exit\n");
299 fprintf(output, " -o <name>:<value> ... override preference setting\n");
300 fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
304 * For a dissector table, print on the stream described by output,
305 * its short name (which is what's used in the "-d" option) and its
309 display_dissector_table_names(const char *table_name, const char *ui_name,
312 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
316 * For a dissector handle, print on the stream described by output,
317 * the filter name (which is what's used in the "-d" option) and the full
318 * name for the protocol that corresponds to this handle.
321 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
324 const gchar* proto_filter_name;
325 const gchar* proto_ui_name;
327 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
329 if (proto_id != -1) {
330 proto_filter_name = proto_get_protocol_filter_name(proto_id);
331 proto_ui_name = proto_get_protocol_name(proto_id);
332 g_assert(proto_filter_name != NULL);
333 g_assert(proto_ui_name != NULL);
335 fprintf((FILE *)output, "\t%s (%s)\n",
342 * The protocol_name_search structure is used by find_protocol_name_func()
343 * to pass parameters and store results
345 struct protocol_name_search{
346 gchar *searched_name; /* Protocol filter name we are looking for */
347 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
348 guint nb_match; /* How many dissectors matched searched_name */
350 typedef struct protocol_name_search *protocol_name_search_t;
353 * This function parses all dissectors associated with a table to find the
354 * one whose protocol has the specified filter name. It is called
355 * as a reference function in a call to dissector_table_foreach_handle.
356 * The name we are looking for, as well as the results, are stored in the
357 * protocol_name_search struct pointed to by user_data.
358 * If called using dissector_table_foreach_handle, we actually parse the
359 * whole list of dissectors.
362 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
366 const gchar *protocol_filter_name;
367 protocol_name_search_t search_info;
371 search_info = (protocol_name_search_t)user_data;
373 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
374 if (proto_id != -1) {
375 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
376 g_assert(protocol_filter_name != NULL);
377 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
379 if (search_info->nb_match == 0) {
380 /* Record this handle only if this is the first match */
381 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
383 search_info->nb_match++;
389 * Print all layer type names supported.
390 * We send the output to the stream described by the handle output.
394 fprint_all_layer_types(FILE *output)
397 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
401 * Print all protocol names supported for a specific layer type.
402 * table_name contains the layer type name in which the search is performed.
403 * We send the output to the stream described by the handle output.
407 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
410 dissector_table_foreach_handle(table_name,
411 display_dissector_names,
416 * The function below parses the command-line parameters for the decode as
417 * feature (a string pointer by cl_param).
418 * It checks the format of the command-line, searches for a matching table
419 * and dissector. If a table/dissector match is not found, we display a
420 * summary of the available tables/dissectors (on stderr) and return FALSE.
421 * If everything is fine, we get the "Decode as" preference activated,
422 * then we return TRUE.
425 add_decode_as(const gchar *cl_param)
429 gchar *decoded_param;
430 gchar *remaining_param;
432 gchar *dissector_str;
433 dissector_handle_t dissector_matching;
434 dissector_table_t table_matching;
435 ftenum_t dissector_table_selector_type;
436 struct protocol_name_search user_protocol_name;
438 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
441 decoded_param = g_strdup(cl_param);
442 g_assert(decoded_param);
445 /* The lines below will parse this string (modifying it) to extract all
446 necessary information. Note that decoded_param is still needed since
447 strings are not copied - we just save pointers. */
449 /* This section extracts a layer type (table_name) from decoded_param */
450 table_name = decoded_param; /* Layer type string starts from beginning */
452 remaining_param = strchr(table_name, '=');
453 if (remaining_param == NULL) {
454 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
455 /* If the argument does not follow the template, carry on anyway to check
456 if the table name is at least correct. If remaining_param is NULL,
457 we'll exit anyway further down */
460 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
463 /* Remove leading and trailing spaces from the table name */
464 while ( table_name[0] == ' ' )
466 while ( table_name[strlen(table_name) - 1] == ' ' )
467 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
469 /* The following part searches a table matching with the layer type specified */
470 table_matching = NULL;
472 /* Look for the requested table */
473 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
474 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
477 table_matching = find_dissector_table(table_name);
478 if (!table_matching) {
479 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
483 if (!table_matching) {
484 /* Display a list of supported layer types to help the user, if the
485 specified layer type was not found */
486 cmdarg_err("Valid layer types are:");
487 fprint_all_layer_types(stderr);
489 if (remaining_param == NULL || !table_matching) {
490 /* Exit if the layer type was not found, or if no '=' separator was found
492 g_free(decoded_param);
496 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
497 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
500 remaining_param++; /* Move to the second '=' */
501 *remaining_param = '\0'; /* Remove the second '=' */
503 remaining_param++; /* Position after the layer type string */
505 /* This section extracts a selector value (selector_str) from decoded_param */
507 selector_str = remaining_param; /* Next part starts with the selector number */
509 remaining_param = strchr(selector_str, ',');
510 if (remaining_param == NULL) {
511 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
512 /* If the argument does not follow the template, carry on anyway to check
513 if the selector value is at least correct. If remaining_param is NULL,
514 we'll exit anyway further down */
517 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
520 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
522 switch (dissector_table_selector_type) {
528 /* The selector for this table is an unsigned number. Parse it as such.
529 There's no need to remove leading and trailing spaces from the
530 selector number string, because sscanf will do that for us. */
531 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
532 cmdarg_err("Invalid selector number \"%s\"", selector_str);
533 g_free(decoded_param);
541 /* The selector for this table is a string. */
545 /* There are currently no dissector tables with any types other
546 than the ones listed above. */
547 g_assert_not_reached();
550 if (remaining_param == NULL) {
551 /* Exit if no ',' separator was found (see above) */
552 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
553 fprint_all_protocols_for_layer_types(stderr, table_name);
554 g_free(decoded_param);
558 remaining_param++; /* Position after the selector number string */
560 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
562 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
564 /* Remove leading and trailing spaces from the dissector name */
565 while ( dissector_str[0] == ' ' )
567 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
568 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
570 dissector_matching = NULL;
572 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
573 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 */
574 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
577 user_protocol_name.nb_match = 0;
578 user_protocol_name.searched_name = dissector_str;
579 user_protocol_name.matched_handle = NULL;
581 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 */
583 if (user_protocol_name.nb_match != 0) {
584 dissector_matching = user_protocol_name.matched_handle;
585 if (user_protocol_name.nb_match > 1) {
586 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
590 /* OK, check whether the problem is that there isn't any such
591 protocol, or that there is but it's not specified as a protocol
592 that's valid for that dissector table.
593 Note, we don't exit here, but dissector_matching will remain NULL,
595 if (proto_get_id_by_filter_name(dissector_str) == -1) {
596 /* No such protocol */
597 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
599 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
600 dissector_str, table_name);
605 if (!dissector_matching) {
606 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
607 fprint_all_protocols_for_layer_types(stderr, table_name);
608 g_free(decoded_param);
612 /* This is the end of the code that parses the command-line options.
613 All information is now stored in the variables:
617 The above variables that are strings are still pointing to areas within
618 decoded_parm. decoded_parm thus still needs to be kept allocated in
619 until we stop needing these variables
620 decoded_param will be deallocated at each exit point of this function */
623 /* We now have a pointer to the handle for the requested dissector
624 (requested protocol) inside the variable dissector_matching */
625 switch (dissector_table_selector_type) {
631 /* The selector for this table is an unsigned number. */
632 dissector_change(table_name, selector, dissector_matching);
638 /* The selector for this table is a string. */
639 dissector_change_string(table_name, selector_str, dissector_matching);
643 /* There are currently no dissector tables with any types other
644 than the ones listed above. */
645 g_assert_not_reached();
647 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
652 tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
653 const gchar *message, gpointer user_data)
655 /* ignore log message, if log_level isn't interesting based
656 upon the console log preferences.
657 If the preferences haven't been loaded loaded yet, display the
660 The default console_log_level preference value is such that only
661 ERROR, CRITICAL and WARNING level messages are processed;
662 MESSAGE, INFO and DEBUG level messages are ignored.
664 XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
665 ERROR and CRITICAL level messages so the current code is a behavioral
666 change. The current behavior is the same as in Wireshark.
668 if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
669 prefs.console_log_level != 0) {
673 g_log_default_handler(log_domain, log_level, message, user_data);
678 output_file_description(const char *fname)
680 char *save_file_string;
682 /* Get a string that describes what we're writing to */
683 if (strcmp(fname, "-") == 0) {
684 /* We're writing to the standard output */
685 save_file_string = g_strdup("standard output");
687 /* We're writing to a file with the name in save_file */
688 save_file_string = g_strdup_printf("file \"%s\"", fname);
690 return save_file_string;
694 print_current_user(void) {
695 gchar *cur_user, *cur_group;
696 if (started_with_special_privs()) {
697 cur_user = get_cur_username();
698 cur_group = get_cur_groupname();
699 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
700 cur_user, cur_group);
703 if (running_with_special_privs()) {
704 fprintf(stderr, " This could be dangerous.");
706 fprintf(stderr, "\n");
711 check_capture_privs(void) {
714 /* Warn the user if npf.sys isn't loaded. */
715 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
716 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
717 "capturing or\nlisting interfaces.\n");
723 show_version(GString *comp_info_str, GString *runtime_info_str)
725 printf("TShark " VERSION "%s\n"
732 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
733 runtime_info_str->str);
737 main(int argc, char *argv[])
739 char *init_progfile_dir_error;
742 gboolean arg_error = FALSE;
748 char *gpf_path, *pf_path;
749 char *gdp_path, *dp_path;
750 int gpf_open_errno, gpf_read_errno;
751 int pf_open_errno, pf_read_errno;
752 int gdp_open_errno, gdp_read_errno;
753 int dp_open_errno, dp_read_errno;
756 gboolean list_link_layer_types = FALSE;
757 gboolean start_capture = FALSE;
760 gboolean capture_option_specified = FALSE;
762 gboolean quiet = FALSE;
763 int out_file_type = WTAP_FILE_PCAP;
764 gchar *cf_name = NULL, *rfilter = NULL;
765 #ifdef HAVE_PCAP_OPEN_DEAD
766 struct bpf_program fcode;
768 dfilter_t *rfcode = NULL;
771 GLogLevelFlags log_flags;
774 #define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:K:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
777 #define OPTSTRING_WIN32 "B:"
779 #define OPTSTRING_WIN32 ""
782 #define OPTSTRING_WIN32 ""
783 #endif /* HAVE_LIBPCAP */
785 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
788 * Get credential information for later use.
790 get_credential_info();
793 * Attempt to get the pathname of the executable file.
795 init_progfile_dir_error = init_progfile_dir(argv[0], main);
796 if (init_progfile_dir_error != NULL) {
797 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
798 init_progfile_dir_error);
802 * In order to have the -X opts assigned before the wslua machine starts
803 * we need to call getopts before epan_init() gets called.
806 optind_initial = optind;
808 while ((opt = getopt(argc, argv, optstring)) != -1) {
810 case 'C': /* Configuration Profile */
811 if (profile_exists (optarg)) {
812 set_profile_name (optarg);
814 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
826 optind = optind_initial;
831 /** Send All g_log messages to our own handler **/
835 G_LOG_LEVEL_CRITICAL|
840 G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
842 g_log_set_handler(NULL,
844 tshark_log_handler, NULL /* user_data */);
845 g_log_set_handler(LOG_DOMAIN_MAIN,
847 tshark_log_handler, NULL /* user_data */);
850 g_log_set_handler(LOG_DOMAIN_CAPTURE,
852 tshark_log_handler, NULL /* user_data */);
853 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
855 tshark_log_handler, NULL /* user_data */);
858 initialize_funnel_ops();
861 capture_opts_init(&global_capture_opts, &cfile);
864 timestamp_set_type(TS_RELATIVE);
865 timestamp_set_precision(TS_PREC_AUTO);
867 /* Register all dissectors; we must do this before checking for the
868 "-G" flag, as the "-G" flag dumps information registered by the
869 dissectors, and we must do it before we read the preferences, in
870 case any dissectors register preferences. */
871 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
872 failure_message, open_failure_message, read_failure_message,
873 write_failure_message);
875 /* Register all tap listeners; we do this before we parse the arguments,
876 as the "-z" argument can specify a registered tap. */
878 /* we register the plugin taps before the other taps because
879 stats_tree taps plugins will be registered as tap listeners
880 by stats_tree_stat.c and need to registered before that */
882 register_all_plugin_tap_listeners();
884 register_all_tap_listeners();
886 /* Now register the preferences for any non-dissector modules.
887 We must do that before we read the preferences as well. */
888 prefs_register_modules();
890 /* If invoked with the "-G" flag, we dump out information based on
891 the argument to the "-G" flag; if no argument is specified,
892 for backwards compatibility we dump out a glossary of display
895 XXX - we do this here, for now, to support "-G" with no arguments.
896 If none of our build or other processes uses "-G" with no arguments,
897 we can just process it with the other arguments. */
898 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
899 proto_initialize_all_prefixes();
902 proto_registrar_dump_fields(1);
904 if (strcmp(argv[2], "fields") == 0)
905 proto_registrar_dump_fields(1);
906 else if (strcmp(argv[2], "fields2") == 0)
907 proto_registrar_dump_fields(2);
908 else if (strcmp(argv[2], "fields3") == 0)
909 proto_registrar_dump_fields(3);
910 else if (strcmp(argv[2], "protocols") == 0)
911 proto_registrar_dump_protocols();
912 else if (strcmp(argv[2], "values") == 0)
913 proto_registrar_dump_values();
914 else if (strcmp(argv[2], "decodes") == 0)
915 dissector_dump_decodes();
916 else if (strcmp(argv[2], "defaultprefs") == 0)
918 else if (strcmp(argv[2], "currentprefs") == 0) {
919 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
920 &pf_open_errno, &pf_read_errno, &pf_path);
923 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
930 /* Set the C-language locale to the native environment. */
931 setlocale(LC_ALL, "");
933 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
934 &pf_open_errno, &pf_read_errno, &pf_path);
935 if (gpf_path != NULL) {
936 if (gpf_open_errno != 0) {
937 cmdarg_err("Can't open global preferences file \"%s\": %s.",
938 pf_path, strerror(gpf_open_errno));
940 if (gpf_read_errno != 0) {
941 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
942 pf_path, strerror(gpf_read_errno));
945 if (pf_path != NULL) {
946 if (pf_open_errno != 0) {
947 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
948 strerror(pf_open_errno));
950 if (pf_read_errno != 0) {
951 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
952 pf_path, strerror(pf_read_errno));
958 /* Set the name resolution code's flags from the preferences. */
959 g_resolv_flags = prefs->name_resolve;
961 /* Read the disabled protocols file. */
962 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
963 &dp_path, &dp_open_errno, &dp_read_errno);
964 if (gdp_path != NULL) {
965 if (gdp_open_errno != 0) {
966 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
967 gdp_path, strerror(gdp_open_errno));
969 if (gdp_read_errno != 0) {
970 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
971 gdp_path, strerror(gdp_read_errno));
975 if (dp_path != NULL) {
976 if (dp_open_errno != 0) {
978 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
979 strerror(dp_open_errno));
981 if (dp_read_errno != 0) {
983 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
984 strerror(dp_read_errno));
989 check_capture_privs();
991 init_cap_file(&cfile);
993 /* Print format defaults to this. */
994 print_format = PR_FMT_TEXT;
996 output_fields = output_fields_new();
998 /* Now get our args */
999 while ((opt = getopt(argc, argv, optstring)) != -1) {
1001 case 'a': /* autostop criteria */
1002 case 'b': /* Ringbuffer option */
1003 case 'c': /* Capture x packets */
1004 case 'f': /* capture filter */
1005 case 'i': /* Use interface x */
1006 case 'p': /* Don't capture in promiscuous mode */
1007 case 's': /* Set the snapshot (capture) length */
1008 case 'w': /* Write to capture file x */
1009 case 'y': /* Set the pcap data link type */
1011 case 'B': /* Buffer size */
1014 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
1019 capture_option_specified = TRUE;
1024 /* Configuration profile settings were already processed just ignore them this time*/
1026 case 'd': /* Decode as rule */
1027 if (!add_decode_as(optarg))
1030 #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
1031 case 'K': /* Kerberos keytab file */
1032 read_keytab_file(optarg);
1035 case 'D': /* Print a list of capture devices and exit */
1037 status = capture_opts_list_interfaces(FALSE);
1040 capture_option_specified = TRUE;
1046 output_fields_add(output_fields, optarg);
1050 if(!output_fields_set_option(output_fields, optarg)) {
1051 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1052 output_fields_list_options(stderr);
1057 out_file_type = wtap_short_string_to_file_type(optarg);
1058 if (out_file_type < 0) {
1059 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1060 list_capture_types();
1064 case 'h': /* Print help and exit */
1068 case 'l': /* "Line-buffer" standard output */
1069 /* This isn't line-buffering, strictly speaking, it's just
1070 flushing the standard output after the information for
1071 each packet is printed; however, that should be good
1072 enough for all the purposes to which "-l" is put (and
1073 is probably actually better for "-V", as it does fewer
1076 See the comment in "process_packet()" for an explanation of
1077 why we do that, and why we don't just use "setvbuf()" to
1078 make the standard output line-buffered (short version: in
1079 Windows, "line-buffered" is the same as "fully-buffered",
1080 and the output buffer is only flushed when it fills up). */
1081 line_buffered = TRUE;
1083 case 'L': /* Print list of link-layer types and exit */
1085 list_link_layer_types = TRUE;
1087 capture_option_specified = TRUE;
1091 case 'n': /* No name resolution */
1092 g_resolv_flags = RESOLV_NONE;
1094 case 'N': /* Select what types of addresses/port #s to resolve */
1095 if (g_resolv_flags == RESOLV_ALL)
1096 g_resolv_flags = RESOLV_NONE;
1097 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1098 if (badopt != '\0') {
1099 cmdarg_err("-N specifies unknown resolving option '%c';",
1101 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1105 case 'o': /* Override preference from command line */
1106 switch (prefs_set_pref(optarg)) {
1111 case PREFS_SET_SYNTAX_ERR:
1112 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1116 case PREFS_SET_NO_SUCH_PREF:
1117 case PREFS_SET_OBSOLETE:
1118 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1123 case 'q': /* Quiet */
1126 case 'r': /* Read capture file x */
1127 cf_name = g_strdup(optarg);
1129 case 'R': /* Read file filter */
1132 case 'S': /* show packets in real time */
1133 print_packet_info = TRUE;
1135 case 't': /* Time stamp type */
1136 if (strcmp(optarg, "r") == 0)
1137 timestamp_set_type(TS_RELATIVE);
1138 else if (strcmp(optarg, "a") == 0)
1139 timestamp_set_type(TS_ABSOLUTE);
1140 else if (strcmp(optarg, "ad") == 0)
1141 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1142 else if (strcmp(optarg, "d") == 0)
1143 timestamp_set_type(TS_DELTA);
1144 else if (strcmp(optarg, "dd") == 0)
1145 timestamp_set_type(TS_DELTA_DIS);
1146 else if (strcmp(optarg, "e") == 0)
1147 timestamp_set_type(TS_EPOCH);
1149 cmdarg_err("Invalid time stamp type \"%s\"",
1151 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1152 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1156 case 'T': /* printing Type */
1157 if (strcmp(optarg, "text") == 0) {
1158 output_action = WRITE_TEXT;
1159 print_format = PR_FMT_TEXT;
1160 } else if (strcmp(optarg, "ps") == 0) {
1161 output_action = WRITE_TEXT;
1162 print_format = PR_FMT_PS;
1163 } else if (strcmp(optarg, "pdml") == 0) {
1164 output_action = WRITE_XML;
1166 } else if (strcmp(optarg, "psml") == 0) {
1167 output_action = WRITE_XML;
1169 } else if(strcmp(optarg, "fields") == 0) {
1170 output_action = WRITE_FIELDS;
1171 verbose = TRUE; /* Need full tree info */
1173 cmdarg_err("Invalid -T parameter.");
1174 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1178 case 'v': /* Show version and exit */
1180 GString *comp_info_str;
1181 GString *runtime_info_str;
1182 /* Assemble the compile-time version information string */
1183 comp_info_str = g_string_new("Compiled ");
1184 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
1186 /* Assemble the run-time version information string */
1187 runtime_info_str = g_string_new("Running ");
1188 get_runtime_version_info(runtime_info_str, NULL);
1189 show_version(comp_info_str, runtime_info_str);
1190 g_string_free(comp_info_str, TRUE);
1191 g_string_free(runtime_info_str, TRUE);
1195 case 'V': /* Verbose */
1198 case 'x': /* Print packet data in hex (and ASCII) */
1204 /* We won't call the init function for the stat this soon
1205 as it would disallow MATE's fields (which are registered
1206 by the preferences set callback) from being used as
1207 part of a tap filter. Instead, we just add the argument
1208 to a list of stat arguments. */
1209 if (!process_stat_cmd_arg(optarg)) {
1210 cmdarg_err("invalid -z argument.");
1211 cmdarg_err_cont(" -z argument must be one of :");
1212 list_stat_cmd_args();
1217 case '?': /* Bad flag - print usage message */
1220 list_capture_types();
1230 /* If we specified output fields, but not the output field type... */
1231 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1232 cmdarg_err("Output fields were specified with \"-e\", "
1233 "but \"-Tfields\" was not specified.");
1235 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1236 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1237 "specified with \"-e\".");
1242 /* If no capture filter or read filter has been specified, and there are
1243 still command-line arguments, treat them as the tokens of a capture
1244 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1245 flag was specified. */
1246 if (optind < argc) {
1247 if (cf_name != NULL) {
1248 if (rfilter != NULL) {
1249 cmdarg_err("Read filters were specified both with \"-R\" "
1250 "and with additional command-line arguments");
1253 rfilter = get_args_as_string(argc, argv, optind);
1256 if (global_capture_opts.has_cfilter) {
1257 cmdarg_err("Capture filters were specified both with \"-f\""
1258 " and with additional command-line arguments");
1261 global_capture_opts.has_cfilter = TRUE;
1262 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1264 capture_option_specified = TRUE;
1270 if (!global_capture_opts.saving_to_file) {
1271 /* We're not saving the capture to a file; if "-q" wasn't specified,
1272 we should print packet information */
1274 print_packet_info = TRUE;
1276 /* We're saving to a file; if we're writing to the standard output.
1277 and we'll also be writing dissected packets to the standard
1278 output, reject the request. At best, we could redirect that
1279 to the standard error; we *can't* write both to the standard
1280 output and have either of them be useful. */
1281 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1282 cmdarg_err("You can't write both raw packet data and dissected packets"
1283 " to the standard output.");
1288 /* We're not saving the capture to a file; if "-q" wasn't specified,
1289 we should print packet information */
1291 print_packet_info = TRUE;
1294 #ifndef HAVE_LIBPCAP
1295 if (capture_option_specified)
1296 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1303 /* We don't support capture filters when reading from a capture file
1304 (the BPF compiler doesn't support all link-layer types that we
1305 support in capture files we read). */
1307 if (cf_name != NULL) {
1308 if (global_capture_opts.has_cfilter) {
1309 cmdarg_err("Only read filters, not capture filters, "
1310 "can be specified when reading a capture file.");
1317 if (output_action != WRITE_TEXT) {
1318 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1324 if (list_link_layer_types) {
1325 /* We're supposed to list the link-layer types for an interface;
1326 did the user also specify a capture file to be read? */
1328 /* Yes - that's bogus. */
1329 cmdarg_err("You can't specify -L and a capture file to be read.");
1332 /* No - did they specify a ring buffer option? */
1333 if (global_capture_opts.multi_files_on) {
1334 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1340 * "-r" was specified, so we're reading a capture file.
1341 * Capture options don't apply here.
1343 if (global_capture_opts.multi_files_on) {
1344 cmdarg_err("Multiple capture files requested, but "
1345 "a capture isn't being done.");
1348 if (global_capture_opts.has_file_duration) {
1349 cmdarg_err("Switching capture files after a time interval was specified, but "
1350 "a capture isn't being done.");
1353 if (global_capture_opts.has_ring_num_files) {
1354 cmdarg_err("A ring buffer of capture files was specified, but "
1355 "a capture isn't being done.");
1358 if (global_capture_opts.has_autostop_files) {
1359 cmdarg_err("A maximum number of capture files was specified, but "
1360 "a capture isn't being done.");
1364 /* Note: TShark now allows the restriction of a _read_ file by packet count
1365 * and byte count as well as a write file. Other autostop options remain valid
1366 * only for a write file.
1368 if (global_capture_opts.has_autostop_duration) {
1369 cmdarg_err("A maximum capture time was specified, but "
1370 "a capture isn't being done.");
1375 * "-r" wasn't specified, so we're doing a live capture.
1377 if (global_capture_opts.saving_to_file) {
1378 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1380 /* When capturing, we only support writing libpcap format. */
1381 if (out_file_type != WTAP_FILE_PCAP) {
1382 cmdarg_err("Live captures can only be saved in libpcap format.");
1385 if (global_capture_opts.multi_files_on) {
1386 /* Multiple-file mode doesn't work under certain conditions:
1387 a) it doesn't work if you're writing to the standard output;
1388 b) it doesn't work if you're writing to a pipe;
1390 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1391 cmdarg_err("Multiple capture files requested, but "
1392 "the capture is being written to the standard output.");
1395 if (global_capture_opts.output_to_pipe) {
1396 cmdarg_err("Multiple capture files requested, but "
1397 "the capture file is a pipe.");
1400 if (!global_capture_opts.has_autostop_filesize &&
1401 !global_capture_opts.has_file_duration) {
1402 cmdarg_err("Multiple capture files requested, but "
1403 "no maximum capture file size or duration was specified.");
1408 /* They didn't specify a "-w" flag, so we won't be saving to a
1409 capture file. Check for options that only make sense if
1410 we're saving to a file. */
1411 if (global_capture_opts.has_autostop_filesize) {
1412 cmdarg_err("Maximum capture file size specified, but "
1413 "capture isn't being saved to a file.");
1416 if (global_capture_opts.multi_files_on) {
1417 cmdarg_err("Multiple capture files requested, but "
1418 "the capture isn't being saved to a file.");
1427 /* Start windows sockets */
1428 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1431 /* Notify all registered modules that have had any of their preferences
1432 changed either from one of the preferences file or from the command
1433 line that their preferences have changed. */
1436 /* At this point MATE will have registered its field array so we can
1437 have a tap filter with one of MATE's late-registered fields as part
1438 of the filter. We can now process all the "-z" arguments. */
1439 start_requested_stats();
1441 /* disabled protocols as per configuration file */
1442 if (gdp_path == NULL && dp_path == NULL) {
1443 set_disabled_protos_list();
1446 /* Build the column format array */
1447 build_column_format_array(&cfile.cinfo, prefs->num_cols, TRUE);
1450 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1451 capture_opts_trim_ring_num_files(&global_capture_opts);
1454 if (rfilter != NULL) {
1455 if (!dfilter_compile(rfilter, &rfcode)) {
1456 cmdarg_err("%s", dfilter_error_msg);
1458 #ifdef HAVE_PCAP_OPEN_DEAD
1462 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1464 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1466 " Note: That display filter code looks like a valid capture filter;");
1468 " maybe you mixed them up?");
1477 cfile.rfcode = rfcode;
1479 if (print_packet_info) {
1480 /* If we're printing as text or PostScript, we have
1481 to create a print stream. */
1482 if (output_action == WRITE_TEXT) {
1483 switch (print_format) {
1486 print_stream = print_stream_text_stdio_new(stdout);
1490 print_stream = print_stream_ps_stdio_new(stdout);
1494 g_assert_not_reached();
1499 /* We have to dissect each packet if:
1501 we're printing information about each packet;
1503 we're using a read filter on the packets;
1505 we're using any taps. */
1506 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1510 * We're reading a capture file.
1514 * Immediately relinquish any special privileges we have; we must not
1515 * be allowed to read any capture files the user running TShark
1518 relinquish_special_privs_perm();
1519 print_current_user();
1521 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1526 /* Set timestamp precision; there should arguably be a command-line
1527 option to let the user set this. */
1528 switch(wtap_file_tsprecision(cfile.wth)) {
1529 case(WTAP_FILE_TSPREC_SEC):
1530 timestamp_set_precision(TS_PREC_AUTO_SEC);
1532 case(WTAP_FILE_TSPREC_DSEC):
1533 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1535 case(WTAP_FILE_TSPREC_CSEC):
1536 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1538 case(WTAP_FILE_TSPREC_MSEC):
1539 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1541 case(WTAP_FILE_TSPREC_USEC):
1542 timestamp_set_precision(TS_PREC_AUTO_USEC);
1544 case(WTAP_FILE_TSPREC_NSEC):
1545 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1548 g_assert_not_reached();
1551 /* Process the packets in the file */
1553 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1554 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1555 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1557 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1565 /* No capture file specified, so we're supposed to do a live capture
1566 (or get a list of link-layer types for a live capture device);
1567 do we have support for live captures? */
1574 cmdarg_err("WinPcap couldn't be found.");
1575 detailed_err = cant_load_winpcap_err("TShark");
1576 cmdarg_err_cont("%s", detailed_err);
1577 g_free(detailed_err);
1582 /* trim the interface name and exit if that failed */
1583 if (!capture_opts_trim_iface(&global_capture_opts,
1584 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1588 /* if requested, list the link layer types and exit */
1589 if (list_link_layer_types) {
1590 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1594 if (print_packet_info) {
1595 if (!write_preamble(NULL)) {
1597 show_print_file_io_error(err);
1600 } else if (!quiet) {
1602 * We're not printing information for each packet, and the user
1603 * didn't ask us not to print a count of packets as they arrive,
1604 * so print that count so the user knows that packets are arriving.
1606 * XXX - what if the user wants to do a live capture, doesn't want
1607 * to save it to a file, doesn't want information printed for each
1608 * packet, does want some "-z" statistic, and wants packet counts
1609 * so they know whether they're seeing any packets?
1611 print_packet_counts = TRUE;
1614 /* For now, assume libpcap gives microsecond precision. */
1615 timestamp_set_precision(TS_PREC_AUTO_USEC);
1619 if (print_packet_info) {
1620 if (!write_finale()) {
1622 show_print_file_io_error(err);
1626 /* No - complain. */
1627 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1632 draw_tap_listeners(TRUE);
1633 funnel_dump_all_text_windows();
1636 output_fields_free(output_fields);
1637 output_fields = NULL;
1642 /*#define USE_BROKEN_G_MAIN_LOOP*/
1644 #ifdef USE_BROKEN_G_MAIN_LOOP
1647 gboolean loop_running = FALSE;
1649 guint32 packet_count = 0;
1652 /* XXX - move to the right position / file */
1653 /* read from a pipe (callback) */
1654 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1656 typedef struct pipe_input_tag {
1660 pipe_input_cb_t input_cb;
1661 guint pipe_input_id;
1663 GStaticMutex callback_running;
1667 static pipe_input_t pipe_input;
1670 /* The timer has expired, see if there's stuff to read from the pipe,
1671 if so, do the callback */
1673 pipe_timer_cb(gpointer data)
1677 gboolean result, result1;
1679 pipe_input_t *pipe_input = data;
1680 gint iterations = 0;
1683 g_static_mutex_lock (&pipe_input->callback_running);
1685 /* try to read data from the pipe only 5 times, to avoid blocking */
1686 while(iterations < 5) {
1687 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1689 /* Oddly enough although Named pipes don't work on win9x,
1690 PeekNamedPipe does !!! */
1691 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1692 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1694 /* Get the child process exit status */
1695 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1698 /* If the Peek returned an error, or there are bytes to be read
1699 or the childwatcher thread has terminated then call the normal
1701 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1703 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1705 /* And call the real handler */
1706 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1707 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1708 /* pipe closed, return false so that the timer is stopped */
1709 g_static_mutex_unlock (&pipe_input->callback_running);
1714 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1715 /* No data, stop now */
1722 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1724 g_static_mutex_unlock (&pipe_input->callback_running);
1726 /* we didn't stopped the timer, so let it run */
1733 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1736 pipe_input.source = source;
1737 pipe_input.child_process = child_process;
1738 pipe_input.user_data = user_data;
1739 pipe_input.input_cb = input_cb;
1742 g_static_mutex_init(&pipe_input.callback_running);
1743 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1744 do this but that doesn't cover all win32 platforms. GTK can do
1745 this but doesn't seem to work over processes. Attempt to do
1746 something similar here, start a timer and check for data on every
1748 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1749 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1759 #ifdef USE_TSHARK_SELECT
1763 struct sigaction action, oldaction;
1767 * XXX - dropping privileges is still required, until code cleanup is done
1769 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1770 * when it's done, we don't need special privileges to run tshark at all,
1771 * therefore we don't need to drop these privileges
1772 * The only thing we might want to keep is a warning if tshark is run as root,
1773 * as it's no longer necessary and potentially dangerous.
1775 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1776 * We've opened the capture device, so we shouldn't need any special
1777 * privileges any more; relinquish those privileges.
1779 * XXX - if we have saved set-user-ID support, we should give up those
1780 * privileges immediately, and then reclaim them long enough to get
1781 * a list of network interfaces and to open one, and then give them
1782 * up again, so that stuff we do while processing the argument list,
1783 * reading the user's preferences, loading and starting plugins
1784 * (especially *user* plugins), etc. is done with the user's privileges,
1785 * not special privileges.
1787 relinquish_special_privs_perm();
1788 print_current_user();
1790 /* Cleanup all data structures used for dissection. */
1791 cleanup_dissection();
1792 /* Initialize all data structures used for dissection. */
1796 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1797 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1799 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1801 action.sa_handler = capture_cleanup;
1802 action.sa_flags = 0;
1803 sigemptyset(&action.sa_mask);
1804 sigaction(SIGTERM, &action, NULL);
1805 sigaction(SIGINT, &action, NULL);
1806 sigaction(SIGHUP, NULL, &oldaction);
1807 if (oldaction.sa_handler == SIG_DFL)
1808 sigaction(SIGHUP, &action, NULL);
1811 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1812 quiet mode, report the number of packets we've captured. */
1813 action.sa_handler = report_counts_siginfo;
1814 action.sa_flags = 0;
1815 sigemptyset(&action.sa_mask);
1816 sigaction(SIGINFO, &action, NULL);
1817 #endif /* SIGINFO */
1820 global_capture_opts.state = CAPTURE_PREPARING;
1822 /* Let the user know what interface was chosen. */
1823 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1824 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1826 ret = sync_pipe_start(&global_capture_opts);
1831 /* the actual capture loop
1833 * XXX - glib doesn't seem to provide any event based loop handling.
1835 * XXX - for whatever reason,
1836 * calling g_main_loop_new() ends up in 100% cpu load.
1838 * But that doesn't matter: in UNIX we can use select() to find an input
1839 * source with something to do.
1841 * But that doesn't matter because we're in a CLI (that doesn't need to
1842 * update a GUI or something at the same time) so it's OK if we block
1843 * trying to read from the pipe.
1845 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1846 * wrong (but I leave it there in case I am...).
1849 #ifdef USE_TSHARK_SELECT
1851 FD_SET(pipe_input.source, &readfds);
1854 loop_running = TRUE;
1856 while (loop_running)
1858 #ifdef USE_TSHARK_SELECT
1859 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1865 } else if (ret == 1) {
1867 /* Call the real handler */
1868 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1869 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1872 #ifdef USE_TSHARK_SELECT
1881 /* XXX - move the call to main_window_update() out of capture_sync.c */
1882 /* dummy for capture_sync.c to make linker happy */
1883 void main_window_update(void)
1887 /* capture child detected an error */
1889 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1891 cmdarg_err("%s", error_msg);
1892 cmdarg_err_cont("%s", secondary_error_msg);
1896 /* capture child detected an capture filter related error */
1898 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1900 dfilter_t *rfcode = NULL;
1903 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1905 "Invalid capture filter: \"%s\"!\n"
1907 "That string looks like a valid display filter; however, it isn't a valid\n"
1908 "capture filter (%s).\n"
1910 "Note that display filters and capture filters don't have the same syntax,\n"
1911 "so you can't use most display filter expressions as capture filters.\n"
1913 "See the User's Guide for a description of the capture filter syntax.",
1914 capture_opts->cfilter, error_message);
1915 dfilter_free(rfcode);
1918 "Invalid capture filter: \"%s\"!\n"
1920 "That string isn't a valid capture filter (%s).\n"
1921 "See the User's Guide for a description of the capture filter syntax.",
1922 capture_opts->cfilter, error_message);
1927 /* capture child tells us we have a new (or the first) capture file */
1929 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1931 gboolean is_tempfile;
1935 if(capture_opts->state == CAPTURE_PREPARING) {
1936 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1938 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1940 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1942 /* free the old filename */
1943 if (capture_opts->save_file != NULL) {
1945 /* we start a new capture file, close the old one (if we had one before) */
1946 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1947 if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
1948 wtap_close(((capture_file *) capture_opts->cf)->wth);
1950 ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
1953 g_free(capture_opts->save_file);
1954 is_tempfile = FALSE;
1956 /* we didn't had a save_file before, must be a tempfile */
1960 /* save the new filename */
1961 capture_opts->save_file = g_strdup(new_file);
1963 /* if we are in real-time mode, open the new file now */
1965 /* Attempt to open the capture file and set up to read from it. */
1966 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1970 /* Don't unlink (delete) the save file - leave it around,
1971 for debugging purposes. */
1972 g_free(capture_opts->save_file);
1973 capture_opts->save_file = NULL;
1978 capture_opts->state = CAPTURE_RUNNING;
1984 /* capture child tells us we have new packets to read */
1986 capture_input_new_packets(capture_options *capture_opts, int to_read)
1992 capture_file *cf = capture_opts->cf;
1993 gboolean filtering_tap_listeners;
1998 * Prevent a SIGINFO handler from writing to stdout while we're
1999 * doing so; instead, have it just set a flag telling us to print
2000 * that information when we're done.
2003 #endif /* SIGINFO */
2005 /* Do we have any tap listeners with filters? */
2006 filtering_tap_listeners = have_filtering_tap_listeners();
2008 /* Get the union of the flags for all tap listeners. */
2009 tap_flags = union_of_tap_listener_flags();
2012 while (to_read-- && cf->wth) {
2013 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2015 /* read from file failed, tell the capture child to stop */
2016 sync_pipe_stop(capture_opts);
2017 wtap_close(cf->wth);
2020 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2021 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2022 filtering_tap_listeners, tap_flags);
2025 /* packet sucessfully read and gone through the "Read Filter" */
2031 * Dumpcap's doing all the work; we're not doing any dissection.
2032 * Count all the packets it wrote.
2034 packet_count += to_read;
2037 if (print_packet_counts) {
2038 /* We're printing packet counts. */
2039 if (packet_count != 0) {
2040 fprintf(stderr, "\r%u ", packet_count);
2041 /* stderr could be line buffered */
2048 * Allow SIGINFO handlers to write.
2053 * If a SIGINFO handler asked us to write out capture counts, do so.
2057 #endif /* SIGINFO */
2063 if (!print_packet_counts) {
2064 /* Report the count only if we aren't printing a packet count
2065 as packets arrive. */
2066 fprintf(stderr, "%u packet%s captured\n", packet_count,
2067 plurality(packet_count, "", "s"));
2070 infoprint = FALSE; /* we just reported it */
2071 #endif /* SIGINFO */
2076 report_counts_siginfo(int signum _U_)
2078 int sav_errno = errno;
2079 /* If we've been told to delay printing, just set a flag asking
2080 that we print counts (if we're supposed to), otherwise print
2081 the count of packets captured (if we're supposed to). */
2088 #endif /* SIGINFO */
2091 /* capture child detected any packet drops? */
2093 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2095 if (print_packet_counts) {
2096 /* We're printing packet counts to stderr.
2097 Send a newline so that we move to the line after the packet count. */
2098 fprintf(stderr, "\n");
2102 /* We're printing packet counts to stderr.
2103 Send a newline so that we move to the line after the packet count. */
2104 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2109 /* capture child closed its side of the pipe, do the required cleanup */
2111 capture_input_closed(capture_options *capture_opts)
2115 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2116 wtap_close(((capture_file *) capture_opts->cf)->wth);
2118 #ifdef USE_BROKEN_G_MAIN_LOOP
2119 /*g_main_loop_quit(loop);*/
2122 loop_running = FALSE;
2131 capture_cleanup(DWORD ctrltype _U_)
2133 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2134 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2135 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2136 like SIGTERM at least when the machine's shutting down.
2138 For now, we handle them all as indications that we should clean up
2139 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2142 However, as handlers run in a new thread, we can't just longjmp
2143 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2144 no other handler - such as one that would terminate the process -
2147 XXX - for some reason, typing ^C to TShark, if you run this in
2148 a Cygwin console window in at least some versions of Cygwin,
2149 causes TShark to terminate immediately; this routine gets
2150 called, but the main loop doesn't get a chance to run and
2151 exit cleanly, at least if this is compiled with Microsoft Visual
2152 C++ (i.e., it's a property of the Cygwin console window or Bash;
2153 it happens if TShark is not built with Cygwin - for all I know,
2154 building it with Cygwin may make the problem go away). */
2156 /* tell the capture child to stop */
2157 sync_pipe_stop(&global_capture_opts);
2159 /* don't stop our own loop already here, otherwise status messages and
2160 * cleanup wouldn't be done properly. The child will indicate the stop of
2161 * everything by calling capture_input_closed() later */
2167 capture_cleanup(int signum _U_)
2169 /* tell the capture child to stop */
2170 sync_pipe_stop(&global_capture_opts);
2173 #endif /* HAVE_LIBPCAP */
2176 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2177 int max_packet_count, gint64 max_byte_count)
2180 int snapshot_length;
2185 char *save_file_string = NULL;
2186 gboolean filtering_tap_listeners;
2189 linktype = wtap_file_encap(cf->wth);
2190 if (save_file != NULL) {
2191 /* Get a string that describes what we're writing to */
2192 save_file_string = output_file_description(save_file);
2194 /* Set up to write to the capture file. */
2195 snapshot_length = wtap_snapshot_length(cf->wth);
2196 if (snapshot_length == 0) {
2197 /* Snapshot length of input file not known. */
2198 snapshot_length = WTAP_MAX_PACKET_SIZE;
2200 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2201 FALSE /* compressed */, &err);
2204 /* We couldn't set up to write to the capture file. */
2207 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2208 cmdarg_err("Capture files can't be written in that format.");
2211 case WTAP_ERR_UNSUPPORTED_ENCAP:
2212 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2213 cmdarg_err("The capture file being read can't be written in "
2217 case WTAP_ERR_CANT_OPEN:
2218 cmdarg_err("The %s couldn't be created for some "
2219 "unknown reason.", save_file_string);
2222 case WTAP_ERR_SHORT_WRITE:
2223 cmdarg_err("A full header couldn't be written to the %s.",
2228 cmdarg_err("The %s could not be created: %s.", save_file_string,
2229 wtap_strerror(err));
2235 if (print_packet_info) {
2236 if (!write_preamble(cf)) {
2238 show_print_file_io_error(err);
2245 /* Do we have any tap listeners with filters? */
2246 filtering_tap_listeners = have_filtering_tap_listeners();
2248 /* Get the union of the flags for all tap listeners. */
2249 tap_flags = union_of_tap_listener_flags();
2251 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2252 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2253 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2254 filtering_tap_listeners, tap_flags)) {
2255 /* Either there's no read filtering or this packet passed the
2256 filter, so, if we're writing to a capture file, write
2259 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2260 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2262 /* Error writing to a capture file */
2263 show_capture_file_io_error(save_file, err, FALSE);
2264 wtap_dump_close(pdh, &err);
2268 /* Stop reading if we have the maximum number of packets;
2269 * When the -c option has not been used, max_packet_count
2270 * starts at 0, which practically means, never stop reading.
2271 * (unless we roll over max_packet_count ?)
2273 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2274 err = 0; /* This is not an error */
2280 /* Print a message noting that the read failed somewhere along the line. */
2283 case WTAP_ERR_UNSUPPORTED_ENCAP:
2284 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2285 cf->filename, err_info);
2289 case WTAP_ERR_CANT_READ:
2290 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2294 case WTAP_ERR_SHORT_READ:
2295 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2299 case WTAP_ERR_BAD_RECORD:
2300 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2301 cf->filename, err_info);
2306 cmdarg_err("An error occurred while reading \"%s\": %s.",
2307 cf->filename, wtap_strerror(err));
2310 if (save_file != NULL) {
2311 /* Now close the capture file. */
2312 if (!wtap_dump_close(pdh, &err))
2313 show_capture_file_io_error(save_file, err, TRUE);
2316 if (save_file != NULL) {
2317 /* Now close the capture file. */
2318 if (!wtap_dump_close(pdh, &err))
2319 show_capture_file_io_error(save_file, err, TRUE);
2321 if (print_packet_info) {
2322 if (!write_finale()) {
2324 show_print_file_io_error(err);
2331 wtap_close(cf->wth);
2334 g_free(save_file_string);
2339 /* Free up all data attached to a "frame_data" structure. */
2341 clear_fdata(frame_data *fdata)
2344 g_slist_free(fdata->pfd);
2348 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2349 union wtap_pseudo_header *pseudo_header, const guchar *pd,
2350 gboolean filtering_tap_listeners, guint tap_flags)
2353 gboolean create_proto_tree;
2358 /* Count this packet. */
2361 /* If we're going to print packet information, or we're going to
2362 run a read filter, or we're going to process taps, set up to
2363 do a dissection and do so. */
2364 if (do_dissection) {
2365 frame_data_init(&fdata, cf, whdr, offset,
2366 &cum_bytes, &first_ts, &prev_dis_ts, &prev_cap_ts);
2368 if (print_packet_info) {
2369 /* Grab any resolved addresses */
2371 if (g_resolv_flags) {
2372 host_name_lookup_process(NULL);
2377 if (cf->rfcode || verbose || filtering_tap_listeners ||
2378 (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
2379 create_proto_tree = TRUE;
2381 create_proto_tree = FALSE;
2382 /* The protocol tree will be "visible", i.e., printed, only if we're
2383 printing packet details, which is true if we're printing stuff
2384 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2386 epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
2388 /* If we're running a read filter, prime the epan_dissect_t with that
2391 epan_dissect_prime_dfilter(&edt, cf->rfcode);
2393 col_custom_prime_edt(&edt, &cf->cinfo);
2395 tap_queue_init(&edt);
2397 /* We only need the columns if either
2399 1) some tap needs the columns
2403 2) we're printing packet info but we're *not* verbose; in verbose
2404 mode, we print the protocol tree, not the protocol summary. */
2405 if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
2409 epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
2411 tap_push_tapped_queue(&edt);
2413 /* Run the read filter if we have one. */
2415 passed = dfilter_apply_edt(cf->rfcode, &edt);
2419 /* We're not running a display filter and we're not printing any
2420 packet information, so we don't need to do a dissection, and all
2421 packets are processed. */
2426 /* Keep the time of the current packet if the packet passed
2427 the read filter so that the delta time since last displayed
2428 packet can be calculated */
2429 prev_dis_ts = fdata.abs_ts;
2431 /* Process this packet. */
2432 if (print_packet_info) {
2433 /* We're printing packet information; print the information for
2436 print_packet(cf, &edt);
2438 print_packet(cf, NULL);
2440 /* The ANSI C standard does not appear to *require* that a line-buffered
2441 stream be flushed to the host environment whenever a newline is
2442 written, it just says that, on such a stream, characters "are
2443 intended to be transmitted to or from the host environment as a
2444 block when a new-line character is encountered".
2446 The Visual C++ 6.0 C implementation doesn't do what is intended;
2447 even if you set a stream to be line-buffered, it still doesn't
2448 flush the buffer at the end of every line.
2450 So, if the "-l" flag was specified, we flush the standard output
2451 at the end of a packet. This will do the right thing if we're
2452 printing packet summary lines, and, as we print the entire protocol
2453 tree for a single packet without waiting for anything to happen,
2454 it should be as good as line-buffered mode if we're printing
2455 protocol trees. (The whole reason for the "-l" flag in either
2456 tcpdump or TShark is to allow the output of a live capture to
2457 be piped to a program or script and to have that script see the
2458 information for the packet as soon as it's printed, rather than
2459 having to wait until a standard I/O buffer fills up. */
2463 if (ferror(stdout)) {
2464 show_print_file_io_error(errno);
2470 if (do_dissection) {
2471 epan_dissect_cleanup(&edt);
2472 clear_fdata(&fdata);
2478 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2480 char *save_file_string;
2482 save_file_string = output_file_description(fname);
2487 cmdarg_err("Not all the packets could be written to the %s because there is "
2488 "no space left on the file system.",
2494 cmdarg_err("Not all the packets could be written to the %s because you are "
2495 "too close to, or over your disk quota.",
2500 case WTAP_ERR_CANT_CLOSE:
2501 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2505 case WTAP_ERR_SHORT_WRITE:
2506 cmdarg_err("Not all the packets could be written to the %s.",
2512 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2513 wtap_strerror(err));
2515 cmdarg_err("An error occurred while writing to the %s: %s.",
2516 save_file_string, wtap_strerror(err));
2520 g_free(save_file_string);
2524 write_preamble(capture_file *cf)
2526 switch (output_action) {
2529 return print_preamble(print_stream, cf ? cf->filename : NULL);
2533 write_pdml_preamble(stdout);
2535 write_psml_preamble(stdout);
2536 return !ferror(stdout);
2539 write_fields_preamble(output_fields, stdout);
2540 return !ferror(stdout);
2543 g_assert_not_reached();
2549 get_line_buf(size_t len)
2551 static char *line_bufp = NULL;
2552 static size_t line_buf_len = 256;
2553 size_t new_line_buf_len;
2555 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2556 new_line_buf_len *= 2)
2558 if (line_bufp == NULL) {
2559 line_buf_len = new_line_buf_len;
2560 line_bufp = g_malloc(line_buf_len + 1);
2562 if (new_line_buf_len > line_buf_len) {
2563 line_buf_len = new_line_buf_len;
2564 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2571 print_columns(capture_file *cf)
2578 line_bufp = get_line_buf(256);
2581 for (i = 0; i < cf->cinfo.num_cols; i++) {
2582 switch (cf->cinfo.col_fmt[i]) {
2586 * Don't print this if we're doing a live capture from a network
2587 * interface - if we're doing a live capture, you won't be
2588 * able to look at the capture in the future (it's not being
2589 * saved anywhere), so the frame numbers are unlikely to be
2592 * (XXX - it might be nice to be able to save and print at
2593 * the same time, sort of like an "Update list of packets
2594 * in real time" capture in Wireshark.)
2596 if (global_capture_opts.iface != NULL)
2599 column_len = strlen(cf->cinfo.col_data[i]);
2602 line_bufp = get_line_buf(buf_offset + column_len);
2603 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2609 case COL_ABS_DATE_TIME: /* XXX - wider */
2610 column_len = strlen(cf->cinfo.col_data[i]);
2611 if (column_len < 10)
2613 line_bufp = get_line_buf(buf_offset + column_len);
2614 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2620 case COL_DEF_DL_SRC:
2621 case COL_RES_DL_SRC:
2622 case COL_UNRES_DL_SRC:
2623 case COL_DEF_NET_SRC:
2624 case COL_RES_NET_SRC:
2625 case COL_UNRES_NET_SRC:
2626 column_len = strlen(cf->cinfo.col_data[i]);
2627 if (column_len < 12)
2629 line_bufp = get_line_buf(buf_offset + column_len);
2630 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2636 case COL_DEF_DL_DST:
2637 case COL_RES_DL_DST:
2638 case COL_UNRES_DL_DST:
2639 case COL_DEF_NET_DST:
2640 case COL_RES_NET_DST:
2641 case COL_UNRES_NET_DST:
2642 column_len = strlen(cf->cinfo.col_data[i]);
2643 if (column_len < 12)
2645 line_bufp = get_line_buf(buf_offset + column_len);
2646 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2650 column_len = strlen(cf->cinfo.col_data[i]);
2651 line_bufp = get_line_buf(buf_offset + column_len);
2652 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2655 buf_offset += column_len;
2656 if (i != cf->cinfo.num_cols - 1) {
2658 * This isn't the last column, so we need to print a
2659 * separator between this column and the next.
2661 * If we printed a network source and are printing a
2662 * network destination of the same type next, separate
2663 * them with "->"; if we printed a network destination
2664 * and are printing a network source of the same type
2665 * next, separate them with "<-"; otherwise separate them
2668 * We add enough space to the buffer for " <- " or " -> ",
2669 * even if we're only adding " ".
2671 line_bufp = get_line_buf(buf_offset + 4);
2672 switch (cf->cinfo.col_fmt[i]) {
2677 switch (cf->cinfo.col_fmt[i + 1]) {
2682 strcat(line_bufp + buf_offset, " -> ");
2687 strcat(line_bufp + buf_offset, " ");
2693 case COL_DEF_DL_SRC:
2694 case COL_RES_DL_SRC:
2695 case COL_UNRES_DL_SRC:
2696 switch (cf->cinfo.col_fmt[i + 1]) {
2698 case COL_DEF_DL_DST:
2699 case COL_RES_DL_DST:
2700 case COL_UNRES_DL_DST:
2701 strcat(line_bufp + buf_offset, " -> ");
2706 strcat(line_bufp + buf_offset, " ");
2712 case COL_DEF_NET_SRC:
2713 case COL_RES_NET_SRC:
2714 case COL_UNRES_NET_SRC:
2715 switch (cf->cinfo.col_fmt[i + 1]) {
2717 case COL_DEF_NET_DST:
2718 case COL_RES_NET_DST:
2719 case COL_UNRES_NET_DST:
2720 strcat(line_bufp + buf_offset, " -> ");
2725 strcat(line_bufp + buf_offset, " ");
2734 switch (cf->cinfo.col_fmt[i + 1]) {
2739 strcat(line_bufp + buf_offset, " <- ");
2744 strcat(line_bufp + buf_offset, " ");
2750 case COL_DEF_DL_DST:
2751 case COL_RES_DL_DST:
2752 case COL_UNRES_DL_DST:
2753 switch (cf->cinfo.col_fmt[i + 1]) {
2755 case COL_DEF_DL_SRC:
2756 case COL_RES_DL_SRC:
2757 case COL_UNRES_DL_SRC:
2758 strcat(line_bufp + buf_offset, " <- ");
2763 strcat(line_bufp + buf_offset, " ");
2769 case COL_DEF_NET_DST:
2770 case COL_RES_NET_DST:
2771 case COL_UNRES_NET_DST:
2772 switch (cf->cinfo.col_fmt[i + 1]) {
2774 case COL_DEF_NET_SRC:
2775 case COL_RES_NET_SRC:
2776 case COL_UNRES_NET_SRC:
2777 strcat(line_bufp + buf_offset, " <- ");
2782 strcat(line_bufp + buf_offset, " ");
2789 strcat(line_bufp + buf_offset, " ");
2795 return print_line(print_stream, 0, line_bufp);
2799 print_packet(capture_file *cf, epan_dissect_t *edt)
2801 print_args_t print_args;
2804 /* Print the information in the protocol tree. */
2805 switch (output_action) {
2808 print_args.to_file = TRUE;
2809 print_args.format = print_format;
2810 print_args.print_summary = !verbose;
2811 print_args.print_hex = verbose && print_hex;
2812 print_args.print_formfeed = FALSE;
2813 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2815 /* init the packet range */
2816 packet_range_init(&print_args.range);
2818 if (!proto_tree_print(&print_args, edt, print_stream))
2821 /* "print_hex_data()" will put out a leading blank line, as well
2822 as a trailing one; print one here, to separate the packets,
2823 only if "print_hex_data()" won't be called. */
2824 if (!print_line(print_stream, 0, ""))
2830 proto_tree_write_pdml(edt, stdout);
2832 return !ferror(stdout);
2834 proto_tree_write_fields(output_fields, edt, stdout);
2836 return !ferror(stdout);
2839 /* Just fill in the columns. */
2840 epan_dissect_fill_in_columns(edt, FALSE, TRUE);
2842 /* Now print them. */
2843 switch (output_action) {
2846 if (!print_columns(cf))
2851 proto_tree_write_psml(edt, stdout);
2852 return !ferror(stdout);
2853 case WRITE_FIELDS: /*No non-verbose "fields" format */
2854 g_assert_not_reached();
2859 if (!print_hex_data(print_stream, edt))
2861 if (!print_line(print_stream, 0, ""))
2870 switch (output_action) {
2873 return print_finale(print_stream);
2877 write_pdml_finale(stdout);
2879 write_psml_finale(stdout);
2880 return !ferror(stdout);
2883 write_fields_finale(output_fields, stdout);
2884 return !ferror(stdout);
2887 g_assert_not_reached();
2893 show_print_file_io_error(int err)
2898 cmdarg_err("Not all the packets could be printed because there is "
2899 "no space left on the file system.");
2904 cmdarg_err("Not all the packets could be printed because you are "
2905 "too close to, or over your disk quota.");
2910 cmdarg_err("An error occurred while printing packets: %s.",
2917 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2921 static char errmsg_errno[1024+1];
2924 /* Wiretap error. */
2927 case WTAP_ERR_NOT_REGULAR_FILE:
2928 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2931 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2932 /* Seen only when opening a capture file for reading. */
2933 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2936 case WTAP_ERR_UNSUPPORTED:
2937 /* Seen only when opening a capture file for reading. */
2938 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2939 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2942 errmsg = errmsg_errno;
2945 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2946 /* Seen only when opening a capture file for writing. */
2947 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2948 "The file \"%%s\" is a pipe, and %s capture files can't be "
2949 "written to a pipe.", wtap_file_type_string(file_type));
2950 errmsg = errmsg_errno;
2953 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2954 /* Seen only when opening a capture file for writing. */
2955 errmsg = "TShark doesn't support writing capture files in that format.";
2958 case WTAP_ERR_UNSUPPORTED_ENCAP:
2960 errmsg = "TShark can't save this capture in that format.";
2962 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2963 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2966 errmsg = errmsg_errno;
2970 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2972 errmsg = "TShark can't save this capture in that format.";
2974 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
2977 case WTAP_ERR_BAD_RECORD:
2978 /* Seen only when opening a capture file for reading. */
2979 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2980 "The file \"%%s\" appears to be damaged or corrupt.\n"
2983 errmsg = errmsg_errno;
2986 case WTAP_ERR_CANT_OPEN:
2988 errmsg = "The file \"%s\" could not be created for some unknown reason.";
2990 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
2993 case WTAP_ERR_SHORT_READ:
2994 errmsg = "The file \"%s\" appears to have been cut short"
2995 " in the middle of a packet or other data.";
2998 case WTAP_ERR_SHORT_WRITE:
2999 errmsg = "A full header couldn't be written to the file \"%s\".";
3003 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3004 "The file \"%%s\" could not be %s: %s.",
3005 for_writing ? "created" : "opened",
3006 wtap_strerror(err));
3007 errmsg = errmsg_errno;
3011 errmsg = file_open_error_message(err, for_writing);
3016 * Open/create errors are reported with an console message in TShark.
3019 open_failure_message(const char *filename, int err, gboolean for_writing)
3021 fprintf(stderr, "tshark: ");
3022 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3023 fprintf(stderr, "\n");
3027 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3031 char err_msg[2048+1];
3033 wth = wtap_open_offline(fname, err, &err_info, FALSE);
3037 /* The open succeeded. Fill in the information for this file. */
3039 /* Cleanup all data structures used for dissection. */
3040 cleanup_dissection();
3041 /* Initialize all data structures used for dissection. */
3045 cf->f_datalen = 0; /* not used, but set it anyway */
3047 /* Set the file name because we need it to set the follow stream filter.
3048 XXX - is that still true? We need it for other reasons, though,
3050 cf->filename = g_strdup(fname);
3052 /* Indicate whether it's a permanent or temporary file. */
3053 cf->is_tempfile = is_tempfile;
3055 /* If it's a temporary capture buffer file, mark it as not saved. */
3056 cf->user_saved = !is_tempfile;
3058 cf->cd_t = wtap_file_type(cf->wth);
3060 cf->drops_known = FALSE;
3062 cf->snap = wtap_snapshot_length(cf->wth);
3063 if (cf->snap == 0) {
3064 /* Snapshot length not known. */
3065 cf->has_snap = FALSE;
3066 cf->snap = WTAP_MAX_PACKET_SIZE;
3068 cf->has_snap = TRUE;
3069 nstime_set_zero(&cf->elapsed_time);
3070 nstime_set_unset(&first_ts);
3071 nstime_set_unset(&prev_dis_ts);
3072 nstime_set_unset(&prev_cap_ts);
3074 cf->state = FILE_READ_IN_PROGRESS;
3079 g_snprintf(err_msg, sizeof err_msg,
3080 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3081 cmdarg_err("%s", err_msg);
3087 * General errors are reported with an console message in TShark.
3090 failure_message(const char *msg_format, va_list ap)
3092 fprintf(stderr, "tshark: ");
3093 vfprintf(stderr, msg_format, ap);
3094 fprintf(stderr, "\n");
3098 * Read errors are reported with an console message in TShark.
3101 read_failure_message(const char *filename, int err)
3103 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3104 filename, strerror(err));
3108 * Write errors are reported with an console message in TShark.
3111 write_failure_message(const char *filename, int err)
3113 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
3114 filename, strerror(err));
3118 * Report an error in command-line arguments.
3121 cmdarg_err(const char *fmt, ...)
3126 failure_message(fmt, ap);
3131 * Report additional information for an error in command-line arguments.
3134 cmdarg_err_cont(const char *fmt, ...)
3139 vfprintf(stderr, fmt, ap);
3140 fprintf(stderr, "\n");