5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * Rawshark - Raw field extractor by Gerald Combs <gerald@wireshark.org>
10 * and Loris Degioanni <loris.degioanni@cacetech.com>
11 * Based on TShark, by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
30 * Rawshark does the following:
31 * - Opens a specified file or named pipe
32 * - Applies a specfied DLT or "decode as" encapsulation
33 * - Reads frames prepended with a libpcap packet header.
34 * - Prints a status line, followed by fields from a specified list.
58 #ifdef HAVE_SYS_STAT_H
59 # include <sys/stat.h>
63 #include "wsutil/wsgetopt.h"
67 #include <epan/epan-int.h>
68 #include <epan/epan.h>
69 #include <epan/filesystem.h>
70 #include <wsutil/crash_info.h>
71 #include <wsutil/privileges.h>
72 #include <wsutil/file_util.h>
75 #include <epan/packet.h>
77 #include "frame_tvbuff.h"
78 #include <epan/disabled_protos.h>
79 #include <epan/prefs.h>
80 #include <epan/column.h>
81 #include <epan/print.h>
82 #include <epan/addr_resolv.h>
84 #include "clopts_common.h"
85 #include "cmdarg_err.h"
86 #include "version_info.h"
87 #include <epan/plugins.h>
89 #include "conditions.h"
90 #include "capture_stop_conditions.h"
91 #include "capture_ui_utils.h"
92 #include <epan/epan_dissect.h>
93 #include <epan/stat_cmd_args.h>
94 #include <epan/timestamp.h>
95 #include <wsutil/unicode-utils.h>
96 #include "epan/column-utils.h"
97 #include "epan/proto.h"
100 #include <wiretap/wtap.h>
101 #include <wiretap/libpcap.h>
102 #include <wiretap/pcap-encap.h>
106 #include "capture-pcap-util.h"
108 #include "capture-wpcap.h"
110 #endif /* HAVE_LIBPCAP */
114 #include <wsutil/unicode-utils.h>
119 * This is the template for the decode as option; it is shared between the
120 * various functions that output the usage for this parameter.
122 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
125 static guint32 cum_bytes;
126 static const frame_data *ref;
127 static frame_data ref_frame;
128 static frame_data *prev_dis;
129 static frame_data prev_dis_frame;
130 static frame_data *prev_cap;
131 static frame_data prev_cap_frame;
134 * The way the packet decode is to be written.
137 WRITE_TEXT, /* summary or detail text */
138 WRITE_XML /* PDML or PSML */
139 /* Add CSV and the like here */
142 static gboolean line_buffered;
143 static print_format_e print_format = PR_FMT_TEXT;
145 static gboolean want_pcap_pkthdr;
147 cf_status_t raw_cf_open(capture_file *cf, const char *fname);
148 static int load_cap_file(capture_file *cf);
149 static gboolean process_packet(capture_file *cf, epan_dissect_t *edt, gint64 offset,
150 struct wtap_pkthdr *whdr, const guchar *pd);
151 static void show_print_file_io_error(int err);
153 static void open_failure_message(const char *filename, int err,
154 gboolean for_writing);
155 static void failure_message(const char *msg_format, va_list ap);
156 static void read_failure_message(const char *filename, int err);
157 static void write_failure_message(const char *filename, int err);
158 static void protocolinfo_init(char *field);
159 static gboolean parse_field_string_format(char *format);
162 SF_NONE, /* No format (placeholder) */
163 SF_NAME, /* %D Field name / description */
164 SF_NUMVAL, /* %N Numeric value */
165 SF_STRVAL /* %S String value */
168 typedef struct string_fmt_s {
170 string_fmt_e format; /* Valid if plain is NULL */
176 dfilter_t *rfcodes[64];
178 dfilter_t *rfieldfcodes[64];
181 GPtrArray *string_fmts;
184 print_usage(gboolean print_ver)
191 "Rawshark " VERSION "%s\n"
192 "Dump and analyze network traffic.\n"
193 "See http://www.wireshark.org for more information.\n"
196 wireshark_svnversion, get_copyright_info());
200 fprintf(output, "\n");
201 fprintf(output, "Usage: rawshark [options] ...\n");
202 fprintf(output, "\n");
204 fprintf(output, "Input file:\n");
205 fprintf(output, " -r <infile> set the pipe or file name to read from\n");
207 fprintf(output, "\n");
208 fprintf(output, "Processing:\n");
209 fprintf(output, " -d <encap:linktype>|<proto:protoname>\n");
210 fprintf(output, " packet encapsulation or protocol\n");
211 fprintf(output, " -F <field> field to display\n");
212 fprintf(output, " -n disable all name resolution (def: all enabled)\n");
213 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
214 fprintf(output, " -p use the system's packet header format\n");
215 fprintf(output, " (which may have 64-bit timestamps)\n");
216 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
217 fprintf(output, " -s skip PCAP header on input\n");
219 fprintf(output, "\n");
220 fprintf(output, "Output:\n");
221 fprintf(output, " -l flush output after each packet\n");
222 fprintf(output, " -S format string for fields\n");
223 fprintf(output, " (%%D - name, %%S - stringval, %%N numval)\n");
224 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
226 fprintf(output, "\n");
227 fprintf(output, "Miscellaneous:\n");
228 fprintf(output, " -h display this help and exit\n");
229 fprintf(output, " -o <name>:<value> ... override preference setting\n");
230 fprintf(output, " -v display version info and exit\n");
234 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
235 const gchar *message _U_, gpointer user_data _U_)
240 * Open a pipe for raw input. This is a stripped-down version of
241 * pcap_loop.c:cap_pipe_open_live().
242 * We check if "pipe_name" is "-" (stdin) or a FIFO, and open it.
243 * @param pipe_name The name of the pipe or FIFO.
244 * @return A POSIX file descriptor on success, or -1 on failure.
247 raw_pipe_open(const char *pipe_name)
250 ws_statb64 pipe_stat;
252 char *pncopy, *pos = NULL;
259 g_log(LOG_DOMAIN_CAPTURE_CHILD, G_LOG_LEVEL_DEBUG, "open_raw_pipe: %s", pipe_name);
262 * XXX Rawshark blocks until we return
264 if (strcmp(pipe_name, "-") == 0) {
265 rfd = 0; /* read from stdin */
268 * This is needed to set the stdin pipe into binary mode, otherwise
269 * CR/LF are mangled...
271 _setmode(0, _O_BINARY);
275 if (ws_stat64(pipe_name, &pipe_stat) < 0) {
276 fprintf(stderr, "rawshark: The pipe %s could not be checked: %s\n",
277 pipe_name, g_strerror(errno));
280 if (! S_ISFIFO(pipe_stat.st_mode)) {
281 if (S_ISCHR(pipe_stat.st_mode)) {
283 * Assume the user specified an interface on a system where
284 * interfaces are in /dev. Pretend we haven't seen it.
288 fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",
293 rfd = ws_open(pipe_name, O_RDONLY | O_NONBLOCK, 0000 /* no creation so don't matter */);
295 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",
296 pipe_name, g_strerror(errno));
300 #define PIPE_STR "\\pipe\\"
301 /* Under Windows, named pipes _must_ have the form
302 * "\\<server>\pipe\<pipe_name>". <server> may be "." for localhost.
304 pncopy = g_strdup(pipe_name);
305 if (strstr(pncopy, "\\\\") == pncopy) {
306 pos = strchr(pncopy + 3, '\\');
307 if (pos && g_ascii_strncasecmp(pos, PIPE_STR, strlen(PIPE_STR)) != 0)
314 fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",
319 /* Wait for the pipe to appear */
321 hPipe = CreateFile(utf_8to16(pipe_name), GENERIC_READ, 0, NULL,
322 OPEN_EXISTING, 0, NULL);
324 if (hPipe != INVALID_HANDLE_VALUE)
327 err = GetLastError();
328 if (err != ERROR_PIPE_BUSY) {
329 FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS,
330 NULL, err, 0, (LPTSTR) &err_str, 0, NULL);
331 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s (error %d)\n",
332 pipe_name, utf_16to8(err_str), err);
337 if (!WaitNamedPipe(utf_8to16(pipe_name), 30 * 1000)) {
338 err = GetLastError();
339 FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS,
340 NULL, err, 0, (LPTSTR) &err_str, 0, NULL);
341 fprintf(stderr, "rawshark: \"%s\" could not be waited for: %s (error %d)\n",
342 pipe_name, utf_16to8(err_str), err);
348 rfd = _open_osfhandle((long) hPipe, _O_RDONLY);
350 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",
351 pipe_name, g_strerror(errno));
361 * Parse a link-type argument of the form "encap:<pcap linktype>" or
362 * "proto:<proto name>". "Pcap linktype" must be a name conforming to
363 * pcap_datalink_name_to_val() or an integer; the integer should be
364 * a LINKTYPE_ value supported by Wiretap. "Proto name" must be
365 * a protocol name, e.g. "http".
368 set_link_type(const char *lt_arg) {
369 char *spec_ptr = strchr(lt_arg, ':');
373 dissector_handle_t dhandle;
381 if (strncmp(lt_arg, "encap:", strlen("encap:")) == 0) {
382 dlt_val = linktype_name_to_val(spec_ptr);
385 val = strtol(spec_ptr, &p, 10);
386 if (p == spec_ptr || *p != '\0' || errno != 0 || val > INT_MAX) {
392 * In those cases where a given link-layer header type
393 * has different LINKTYPE_ and DLT_ values, linktype_name_to_val()
394 * will return the OS's DLT_ value for that link-layer header
395 * type, not its OS-independent LINKTYPE_ value.
397 * On a given OS, wtap_pcap_encap_to_wtap_encap() should
398 * be able to map either LINKTYPE_ values or DLT_ values
399 * for the OS to the appropriate Wiretap encapsulation.
401 encap = wtap_pcap_encap_to_wtap_encap(dlt_val);
402 if (encap == WTAP_ENCAP_UNKNOWN) {
406 } else if (strncmp(lt_arg, "proto:", strlen("proto:")) == 0) {
407 dhandle = find_dissector(spec_ptr);
409 encap = WTAP_ENCAP_USER0;
410 pref_str = g_string_new("uat:user_dlts:");
411 /* This must match the format used in the user_dlts file */
412 g_string_append_printf(pref_str,
413 "\"User 0 (DLT=147)\",\"%s\",\"0\",\"\",\"0\",\"\"",
415 if (prefs_set_pref(pref_str->str) != PREFS_SET_OK) {
416 g_string_free(pref_str, TRUE);
419 g_string_free(pref_str, TRUE);
427 show_version(GString *comp_info_str, GString *runtime_info_str)
429 printf("Rawshark " VERSION "%s\n"
436 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
437 runtime_info_str->str);
441 main(int argc, char *argv[])
443 GString *comp_info_str;
444 GString *runtime_info_str;
445 char *init_progfile_dir_error;
447 gboolean arg_error = FALSE;
453 char *gpf_path, *pf_path;
454 char *gdp_path, *dp_path;
455 int gpf_open_errno, gpf_read_errno;
456 int pf_open_errno, pf_read_errno;
457 int gdp_open_errno, gdp_read_errno;
458 int dp_open_errno, dp_read_errno;
460 gchar *pipe_name = NULL;
465 GPtrArray *disp_fields = g_ptr_array_new();
467 gboolean skip_pcap_header = FALSE;
469 #define OPTSTRING_INIT "d:F:hlnN:o:pr:R:sS:t:v"
471 static const char optstring[] = OPTSTRING_INIT;
473 /* Assemble the compile-time version information string */
474 comp_info_str = g_string_new("Compiled ");
475 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
477 /* Assemble the run-time version information string */
478 runtime_info_str = g_string_new("Running ");
479 get_runtime_version_info(runtime_info_str, NULL);
481 /* Add it to the information to be reported on a crash. */
482 ws_add_crash_info("Rawshark " VERSION "%s\n"
487 wireshark_svnversion, comp_info_str->str, runtime_info_str->str);
490 arg_list_utf_16to8(argc, argv);
491 create_app_running_mutex();
495 * Get credential information for later use.
497 init_process_policies();
500 * Clear the filters arrays
502 memset(rfilters, 0, sizeof(rfilters));
503 memset(rfcodes, 0, sizeof(rfcodes));
508 * Initialize our string format
510 string_fmts = g_ptr_array_new();
513 * Attempt to get the pathname of the executable file.
515 init_progfile_dir_error = init_progfile_dir(argv[0], main);
516 if (init_progfile_dir_error != NULL) {
517 fprintf(stderr, "rawshark: Can't get pathname of rawshark program: %s.\n",
518 init_progfile_dir_error);
522 * Get credential information for later use.
524 init_process_policies();
526 /* nothing more than the standard GLib handler, but without a warning */
528 G_LOG_LEVEL_WARNING |
529 G_LOG_LEVEL_MESSAGE |
533 g_log_set_handler(NULL,
534 (GLogLevelFlags)log_flags,
535 log_func_ignore, NULL /* user_data */);
536 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
537 (GLogLevelFlags)log_flags,
538 log_func_ignore, NULL /* user_data */);
540 timestamp_set_type(TS_RELATIVE);
541 timestamp_set_precision(TS_PREC_AUTO);
542 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
544 /* Register all dissectors; we must do this before checking for the
545 "-G" flag, as the "-G" flag dumps information registered by the
546 dissectors, and we must do it before we read the preferences, in
547 case any dissectors register preferences. */
548 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
549 failure_message, open_failure_message, read_failure_message,
550 write_failure_message);
552 /* Set the C-language locale to the native environment. */
553 setlocale(LC_ALL, "");
555 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
556 &pf_open_errno, &pf_read_errno, &pf_path);
557 if (gpf_path != NULL) {
558 if (gpf_open_errno != 0) {
559 cmdarg_err("Can't open global preferences file \"%s\": %s.",
560 pf_path, g_strerror(gpf_open_errno));
562 if (gpf_read_errno != 0) {
563 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
564 pf_path, g_strerror(gpf_read_errno));
567 if (pf_path != NULL) {
568 if (pf_open_errno != 0) {
569 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
570 g_strerror(pf_open_errno));
572 if (pf_read_errno != 0) {
573 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
574 pf_path, g_strerror(pf_read_errno));
580 /* Read the disabled protocols file. */
581 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
582 &dp_path, &dp_open_errno, &dp_read_errno);
583 if (gdp_path != NULL) {
584 if (gdp_open_errno != 0) {
585 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
586 gdp_path, g_strerror(gdp_open_errno));
588 if (gdp_read_errno != 0) {
589 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
590 gdp_path, g_strerror(gdp_read_errno));
594 if (dp_path != NULL) {
595 if (dp_open_errno != 0) {
597 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
598 g_strerror(dp_open_errno));
600 if (dp_read_errno != 0) {
602 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
603 g_strerror(dp_read_errno));
609 /* Load Wpcap, if possible */
613 cap_file_init(&cfile);
615 /* Print format defaults to this. */
616 print_format = PR_FMT_TEXT;
618 /* Initialize our encapsulation type */
619 encap = WTAP_ENCAP_UNKNOWN;
621 /* Now get our args */
622 /* XXX - We should probably have an option to dump libpcap link types */
623 while ((opt = getopt(argc, argv, optstring)) != -1) {
625 case 'd': /* Payload type */
626 if (!set_link_type(optarg)) {
627 cmdarg_err("Invalid link type or protocol \"%s\"", optarg);
631 case 'F': /* Read field to display */
632 g_ptr_array_add(disp_fields, g_strdup(optarg));
634 case 'h': /* Print help and exit */
638 case 'l': /* "Line-buffer" standard output */
639 /* This isn't line-buffering, strictly speaking, it's just
640 flushing the standard output after the information for
641 each packet is printed; however, that should be good
642 enough for all the purposes to which "-l" is put (and
643 is probably actually better for "-V", as it does fewer
646 See the comment in "process_packet()" for an explanation of
647 why we do that, and why we don't just use "setvbuf()" to
648 make the standard output line-buffered (short version: in
649 Windows, "line-buffered" is the same as "fully-buffered",
650 and the output buffer is only flushed when it fills up). */
651 line_buffered = TRUE;
653 case 'n': /* No name resolution */
654 gbl_resolv_flags.mac_name = FALSE;
655 gbl_resolv_flags.network_name = FALSE;
656 gbl_resolv_flags.transport_name = FALSE;
657 gbl_resolv_flags.concurrent_dns = FALSE;
659 case 'N': /* Select what types of addresses/port #s to resolve */
660 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
661 if (badopt != '\0') {
662 cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
667 case 'o': /* Override preference from command line */
668 switch (prefs_set_pref(optarg)) {
673 case PREFS_SET_SYNTAX_ERR:
674 cmdarg_err("Invalid -o flag \"%s\"", optarg);
678 case PREFS_SET_NO_SUCH_PREF:
679 case PREFS_SET_OBSOLETE:
680 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
685 case 'p': /* Expect pcap_pkthdr packet headers, which may have 64-bit timestamps */
686 want_pcap_pkthdr = TRUE;
688 case 'r': /* Read capture file xxx */
689 pipe_name = g_strdup(optarg);
691 case 'R': /* Read file filter */
692 if(n_rfilters < (int) sizeof(rfilters) / (int) sizeof(rfilters[0])) {
693 rfilters[n_rfilters++] = optarg;
696 cmdarg_err("Too many display filters");
700 case 's': /* Skip PCAP header */
701 skip_pcap_header = TRUE;
703 case 'S': /* Print string representations */
704 if (!parse_field_string_format(optarg)) {
705 cmdarg_err("Invalid field string format");
709 case 't': /* Time stamp type */
710 if (strcmp(optarg, "r") == 0)
711 timestamp_set_type(TS_RELATIVE);
712 else if (strcmp(optarg, "a") == 0)
713 timestamp_set_type(TS_ABSOLUTE);
714 else if (strcmp(optarg, "ad") == 0)
715 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
716 else if (strcmp(optarg, "d") == 0)
717 timestamp_set_type(TS_DELTA);
718 else if (strcmp(optarg, "dd") == 0)
719 timestamp_set_type(TS_DELTA_DIS);
720 else if (strcmp(optarg, "e") == 0)
721 timestamp_set_type(TS_EPOCH);
722 else if (strcmp(optarg, "u") == 0)
723 timestamp_set_type(TS_UTC);
724 else if (strcmp(optarg, "ud") == 0)
725 timestamp_set_type(TS_UTC_WITH_DATE);
727 cmdarg_err("Invalid time stamp type \"%s\"",
729 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
730 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
734 case 'v': /* Show version and exit */
736 show_version(comp_info_str, runtime_info_str);
737 g_string_free(comp_info_str, TRUE);
738 g_string_free(runtime_info_str, TRUE);
743 case '?': /* Bad flag - print usage message */
750 /* Notify all registered modules that have had any of their preferences
751 changed either from one of the preferences file or from the command
752 line that their preferences have changed.
753 Initialize preferences before display filters, otherwise modules
754 like MATE won't work. */
757 /* Initialize our display fields */
758 for (fc = 0; fc < disp_fields->len; fc++) {
759 protocolinfo_init((char *)g_ptr_array_index(disp_fields, fc));
761 g_ptr_array_free(disp_fields, TRUE);
765 /* If no capture filter or read filter has been specified, and there are
766 still command-line arguments, treat them as the tokens of a capture
767 filter (if no "-r" flag was specified) or a read filter (if a "-r"
768 flag was specified. */
770 if (pipe_name != NULL) {
771 if (n_rfilters != 0) {
772 cmdarg_err("Read filters were specified both with \"-R\" "
773 "and with additional command-line arguments");
776 rfilters[n_rfilters] = get_args_as_string(argc, argv, optind);
780 /* Make sure we got a dissector handle for our payload. */
781 if (encap == WTAP_ENCAP_UNKNOWN) {
782 cmdarg_err("No valid payload dissector specified.");
793 /* Start windows sockets */
794 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
797 /* At this point MATE will have registered its field array so we can
798 have a tap filter with one of MATE's late-registered fields as part
799 of the filter. We can now process all the "-z" arguments. */
800 start_requested_stats();
802 /* disabled protocols as per configuration file */
803 if (gdp_path == NULL && dp_path == NULL) {
804 set_disabled_protos_list();
807 /* Build the column format array */
808 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
810 if (n_rfilters != 0) {
811 for (i = 0; i < n_rfilters; i++) {
812 if (!dfilter_compile(rfilters[i], &rfcodes[n_rfcodes])) {
813 cmdarg_err("%s", dfilter_error_msg);
814 epan_free(cfile.epan);
824 * We're reading a pipe (or capture file).
828 * Immediately relinquish any special privileges we have; we must not
829 * be allowed to read any capture files the user running Rawshark
832 relinquish_special_privs_perm();
834 if (raw_cf_open(&cfile, pipe_name) != CF_OK) {
835 epan_free(cfile.epan);
840 /* Do we need to PCAP header and magic? */
841 if (skip_pcap_header) {
842 size_t bytes_left = sizeof(struct pcap_hdr) + sizeof(guint32);
843 gchar buf[sizeof(struct pcap_hdr) + sizeof(guint32)];
844 while (bytes_left != 0) {
845 ssize_t bytes = read(fd, buf, (int)bytes_left);
847 cmdarg_err("Not enough bytes for pcap header.");
854 /* Set timestamp precision; there should arguably be a command-line
855 option to let the user set this. */
857 switch(wtap_file_tsprecision(cfile.wth)) {
858 case(WTAP_FILE_TSPREC_SEC):
859 timestamp_set_precision(TS_PREC_AUTO_SEC);
861 case(WTAP_FILE_TSPREC_DSEC):
862 timestamp_set_precision(TS_PREC_AUTO_DSEC);
864 case(WTAP_FILE_TSPREC_CSEC):
865 timestamp_set_precision(TS_PREC_AUTO_CSEC);
867 case(WTAP_FILE_TSPREC_MSEC):
868 timestamp_set_precision(TS_PREC_AUTO_MSEC);
870 case(WTAP_FILE_TSPREC_USEC):
871 timestamp_set_precision(TS_PREC_AUTO_USEC);
873 case(WTAP_FILE_TSPREC_NSEC):
874 timestamp_set_precision(TS_PREC_AUTO_NSEC);
877 g_assert_not_reached();
880 timestamp_set_precision(TS_PREC_AUTO_USEC);
883 /* Process the packets in the file */
884 err = load_cap_file(&cfile);
887 epan_free(cfile.epan);
892 /* If you want to capture live packets, use TShark. */
893 cmdarg_err("Input file or pipe name not specified.");
897 epan_free(cfile.epan);
904 * Read data from a raw pipe. The "raw" data consists of a libpcap
905 * packet header followed by the payload.
906 * @param pd [IN] A POSIX file descriptor. Because that's _exactly_ the sort
907 * of thing you want to use in Windows.
908 * @param phdr [OUT] Packet header information.
909 * @param err [OUT] Error indicator. Uses wiretap values.
910 * @param err_info [OUT] Error message.
911 * @param data_offset [OUT] data offset in the pipe.
912 * @return TRUE on success, FALSE on failure.
915 raw_pipe_read(struct wtap_pkthdr *phdr, guchar * pd, int *err, const gchar **err_info, gint64 *data_offset) {
916 struct pcap_pkthdr mem_hdr;
917 struct pcaprec_hdr disk_hdr;
918 ssize_t bytes_read = 0;
919 size_t bytes_needed = sizeof(disk_hdr);
920 guchar *ptr = (guchar*) &disk_hdr;
921 static gchar err_str[100];
923 if (want_pcap_pkthdr) {
924 bytes_needed = sizeof(mem_hdr);
925 ptr = (guchar*) &mem_hdr;
928 /* Copied from capture_loop.c */
929 while (bytes_needed > 0) {
930 bytes_read = read(fd, ptr, (int)bytes_needed);
931 if (bytes_read == 0) {
934 } else if (bytes_read < 0) {
935 *err = WTAP_ERR_CANT_READ;
936 *err_info = "Error reading header from pipe";
939 bytes_needed -= bytes_read;
940 *data_offset += bytes_read;
944 if (want_pcap_pkthdr) {
945 phdr->ts.secs = mem_hdr.ts.tv_sec;
946 phdr->ts.nsecs = (gint32)mem_hdr.ts.tv_usec * 1000;
947 phdr->caplen = mem_hdr.caplen;
948 phdr->len = mem_hdr.len;
950 phdr->ts.secs = disk_hdr.ts_sec;
951 phdr->ts.nsecs = disk_hdr.ts_usec * 1000;
952 phdr->caplen = disk_hdr.incl_len;
953 phdr->len = disk_hdr.orig_len;
955 bytes_needed = phdr->caplen;
957 phdr->pkt_encap = encap;
960 printf("mem_hdr: %lu disk_hdr: %lu\n", sizeof(mem_hdr), sizeof(disk_hdr));
961 printf("tv_sec: %u (%04x)\n", (unsigned int) phdr->ts.secs, (unsigned int) phdr->ts.secs);
962 printf("tv_nsec: %d (%04x)\n", phdr->ts.nsecs, phdr->ts.nsecs);
963 printf("caplen: %d (%04x)\n", phdr->caplen, phdr->caplen);
964 printf("len: %d (%04x)\n", phdr->len, phdr->len);
966 if (bytes_needed > WTAP_MAX_PACKET_SIZE) {
967 *err = WTAP_ERR_BAD_FILE;
968 g_snprintf(err_str, 100, "Bad packet length: %lu\n",
969 (unsigned long) bytes_needed);
975 while (bytes_needed > 0) {
976 bytes_read = read(fd, ptr, (int)bytes_needed);
977 if (bytes_read == 0) {
978 *err = WTAP_ERR_SHORT_READ;
979 *err_info = "Got zero bytes reading data from pipe";
981 } else if (bytes_read < 0) {
982 *err = WTAP_ERR_CANT_READ;
983 *err_info = "Error reading data from pipe";
986 bytes_needed -= bytes_read;
987 *data_offset += bytes_read;
994 load_cap_file(capture_file *cf)
997 const gchar *err_info;
998 gint64 data_offset = 0;
1000 guchar pd[WTAP_MAX_PACKET_SIZE];
1001 struct wtap_pkthdr phdr;
1004 memset(&phdr, 0, sizeof(phdr));
1006 epan_dissect_init(&edt, cf->epan, TRUE, FALSE);
1008 while (raw_pipe_read(&phdr, pd, &err, &err_info, &data_offset)) {
1009 process_packet(cf, &edt, data_offset, &phdr, pd);
1012 epan_dissect_cleanup(&edt);
1015 /* Print a message noting that the read failed somewhere along the line. */
1018 case WTAP_ERR_UNSUPPORTED_ENCAP:
1019 cmdarg_err("The file \"%s\" has a packet with a network type that Rawshark doesn't support.\n(%s)",
1020 cf->filename, err_info);
1023 case WTAP_ERR_CANT_READ:
1024 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
1028 case WTAP_ERR_SHORT_READ:
1029 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
1033 case WTAP_ERR_BAD_FILE:
1034 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
1035 cf->filename, err_info);
1038 case WTAP_ERR_DECOMPRESS:
1039 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n(%s)",
1040 cf->filename, err_info);
1044 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
1045 cf->filename, wtap_strerror(err));
1054 process_packet(capture_file *cf, epan_dissect_t *edt, gint64 offset,
1055 struct wtap_pkthdr *whdr, const guchar *pd)
1063 /* The user sends an empty packet when he wants to get output from us even if we don't currently have
1064 packets to process. We spit out a line with the timestamp and the text "void"
1066 printf("%lu %lu %lu void -\n", (unsigned long int)cf->count,
1067 (unsigned long int)whdr->ts.secs,
1068 (unsigned long int)whdr->ts.nsecs);
1075 /* Count this packet. */
1078 /* If we're going to print packet information, or we're going to
1079 run a read filter, or we're going to process taps, set up to
1080 do a dissection and do so. */
1081 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
1085 /* If we're running a read filter, prime the epan_dissect_t with that
1087 if (n_rfilters > 0) {
1088 for(i = 0; i < n_rfcodes; i++) {
1089 epan_dissect_prime_dfilter(edt, rfcodes[i]);
1093 printf("%lu", (unsigned long int) cf->count);
1095 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
1098 if (ref == &fdata) {
1103 /* We only need the columns if we're printing packet info but we're
1104 *not* verbose; in verbose mode, we print the protocol tree, not
1105 the protocol summary. */
1106 epan_dissect_run_with_taps(edt, whdr, frame_tvbuff_new(&fdata, pd), &fdata, &cf->cinfo);
1108 frame_data_set_after_dissect(&fdata, &cum_bytes);
1109 prev_dis_frame = fdata;
1110 prev_dis = &prev_dis_frame;
1112 prev_cap_frame = fdata;
1113 prev_cap = &prev_cap_frame;
1115 for(i = 0; i < n_rfilters; i++) {
1116 /* Run the read filter if we have one. */
1118 passed = dfilter_apply_edt(rfcodes[i], edt);
1122 /* Print a one-line summary */
1123 printf(" %u", passed ? 1 : 0);
1128 /* The ANSI C standard does not appear to *require* that a line-buffered
1129 stream be flushed to the host environment whenever a newline is
1130 written, it just says that, on such a stream, characters "are
1131 intended to be transmitted to or from the host environment as a
1132 block when a new-line character is encountered".
1134 The Visual C++ 6.0 C implementation doesn't do what is intended;
1135 even if you set a stream to be line-buffered, it still doesn't
1136 flush the buffer at the end of every line.
1138 So, if the "-l" flag was specified, we flush the standard output
1139 at the end of a packet. This will do the right thing if we're
1140 printing packet summary lines, and, as we print the entire protocol
1141 tree for a single packet without waiting for anything to happen,
1142 it should be as good as line-buffered mode if we're printing
1143 protocol trees. (The whole reason for the "-l" flag in either
1144 tcpdump or Rawshark is to allow the output of a live capture to
1145 be piped to a program or script and to have that script see the
1146 information for the packet as soon as it's printed, rather than
1147 having to wait until a standard I/O buffer fills up. */
1151 if (ferror(stdout)) {
1152 show_print_file_io_error(errno);
1156 epan_dissect_reset(edt);
1157 frame_data_destroy(&fdata);
1162 /****************************************************************************************
1163 * FIELD EXTRACTION ROUTINES
1164 ****************************************************************************************/
1165 typedef struct _pci_t {
1171 static const char* ftenum_to_string(header_field_info *hfi)
1177 if (string_fmts->len > 0 && hfi->strings) {
1185 return "FT_PROTOCOL";
1187 return "FT_BOOLEAN";
1212 case FT_ABSOLUTE_TIME:
1213 return "FT_ABSOLUTE_TIME";
1214 case FT_RELATIVE_TIME:
1215 return "FT_RELATIVE_TIME";
1219 return "FT_STRINGZ";
1220 case FT_UINT_STRING:
1221 return "FT_UINT_STRING";
1227 return "FT_UINT_BYTES";
1235 return "FT_FRAMENUM";
1243 return "FT_REL_OID";
1245 return "FT_NUM_TYPES";
1251 static const char* absolute_time_display_e_to_string(absolute_time_display_e atd)
1254 case ABSOLUTE_TIME_LOCAL:
1255 return "ABSOLUTE_TIME_LOCAL";
1256 case ABSOLUTE_TIME_UTC:
1257 return "ABSOLUTE_TIME_UTC";
1263 static const char* base_display_e_to_string(base_display_e bd)
1275 return "BASE_DEC_HEX";
1277 return "BASE_HEX_DEC";
1284 * Copied from various parts of proto.c
1286 #define FIELD_STR_INIT_LEN 256
1287 #define cVALS(x) (const value_string*)(x)
1288 static gboolean print_field_value(field_info *finfo, int cmd_line_index)
1290 header_field_info *hfinfo;
1291 static char *fs_buf = NULL;
1292 char *fs_ptr = fs_buf;
1293 static GString *label_s = NULL;
1294 int fs_buf_len = FIELD_STR_INIT_LEN, fs_len;
1301 const true_false_string *tfstring = &tfs_true_false;
1303 hfinfo = finfo->hfinfo;
1306 fs_buf = (char *)g_malloc(fs_buf_len + 1);
1311 label_s = g_string_new("");
1314 if(finfo->value.ftype->val_to_string_repr)
1317 * this field has an associated value,
1320 fs_len = fvalue_string_repr_len(&finfo->value, FTREPR_DFILTER);
1321 while (fs_buf_len < fs_len) {
1323 fs_buf = (char *)g_realloc(fs_buf, fs_buf_len + 1);
1326 fvalue_to_string_repr(&finfo->value,
1330 /* String types are quoted. Remove them. */
1331 if ((finfo->value.ftype->ftype == FT_STRING || finfo->value.ftype->ftype == FT_STRINGZ) && fs_len > 2) {
1332 fs_buf[fs_len - 1] = '\0';
1337 if (string_fmts->len > 0 && finfo->hfinfo->strings) {
1338 g_string_truncate(label_s, 0);
1339 for (i = 0; i < string_fmts->len; i++) {
1340 sf = (string_fmt_t *)g_ptr_array_index(string_fmts, i);
1342 g_string_append(label_s, sf->plain);
1344 switch (sf->format) {
1346 g_string_append(label_s, hfinfo->name);
1349 g_string_append(label_s, fs_ptr);
1352 switch(hfinfo->type) {
1354 uvalue = fvalue_get_uinteger(&finfo->value);
1355 tfstring = (const struct true_false_string*) hfinfo->strings;
1356 g_string_append(label_s, uvalue ? tfstring->true_string : tfstring->false_string);
1362 DISSECTOR_ASSERT(!hfinfo->bitmask);
1363 svalue = fvalue_get_sinteger(&finfo->value);
1364 if (hfinfo->display & BASE_RANGE_STRING) {
1365 g_string_append(label_s, rval_to_str_const(svalue, RVALS(hfinfo->strings), "Unknown"));
1366 } else if (hfinfo->display & BASE_EXT_STRING) {
1367 g_string_append(label_s, val_to_str_ext_const(svalue, (const value_string_ext *) hfinfo->strings, "Unknown"));
1369 g_string_append(label_s, val_to_str_const(svalue, cVALS(hfinfo->strings), "Unknown"));
1373 DISSECTOR_ASSERT(!hfinfo->bitmask);
1374 svalue64 = (gint64)fvalue_get_integer64(&finfo->value);
1375 if (hfinfo->display & BASE_VAL64_STRING) {
1376 g_string_append(label_s, val64_to_str_const(svalue64, (const val64_string *)(hfinfo->strings), "Unknown"));
1383 uvalue = fvalue_get_uinteger(&finfo->value);
1384 if (!hfinfo->bitmask && hfinfo->display & BASE_RANGE_STRING) {
1385 g_string_append(label_s, rval_to_str_const(uvalue, RVALS(hfinfo->strings), "Unknown"));
1386 } else if (hfinfo->display & BASE_EXT_STRING) {
1387 g_string_append(label_s, val_to_str_ext_const(uvalue, (const value_string_ext *) hfinfo->strings, "Unknown"));
1389 g_string_append(label_s, val_to_str_const(uvalue, cVALS(hfinfo->strings), "Unknown"));
1393 DISSECTOR_ASSERT(!hfinfo->bitmask);
1394 uvalue64 = fvalue_get_integer64(&finfo->value);
1395 if (hfinfo->display & BASE_VAL64_STRING) {
1396 g_string_append(label_s, val64_to_str_const(uvalue64, (const val64_string *)(hfinfo->strings), "Unknown"));
1408 printf(" %u=\"%s\"", cmd_line_index, label_s->str);
1412 if(finfo->value.ftype->val_to_string_repr)
1414 printf(" %u=\"%s\"", cmd_line_index, fs_ptr);
1419 * This field doesn't have an associated value,
1423 printf(" %u=\"n.a.\"", cmd_line_index);
1428 protocolinfo_packet(void *prs, packet_info *pinfo _U_, epan_dissect_t *edt, const void *dummy _U_)
1430 pci_t *rs=(pci_t *)prs;
1434 gp=proto_get_finfo_ptr_array(edt->tree, rs->hf_index);
1441 * Print each occurrence of the field
1443 for (i = 0; i < gp->len; i++) {
1444 print_field_value((field_info *)gp->pdata[i], rs->cmd_line_index);
1450 int g_cmd_line_index = 0;
1453 * field must be persistent - we don't g_strdup() it below
1456 protocolinfo_init(char *field)
1459 header_field_info *hfi;
1460 GString *error_string;
1462 hfi=proto_registrar_get_byname(field);
1464 fprintf(stderr, "rawshark: Field \"%s\" doesn't exist.\n", field);
1468 switch (hfi->type) {
1470 case FT_ABSOLUTE_TIME:
1471 printf("%u %s %s - ",
1473 ftenum_to_string(hfi),
1474 absolute_time_display_e_to_string((absolute_time_display_e)hfi->display));
1478 printf("%u %s %s - ",
1480 ftenum_to_string(hfi),
1481 base_display_e_to_string((base_display_e)hfi->display));
1485 rs=(pci_t *)g_malloc(sizeof(pci_t));
1486 rs->hf_index=hfi->id;
1488 rs->cmd_line_index = g_cmd_line_index++;
1490 error_string=register_tap_listener("frame", rs, rs->filter, TL_REQUIRES_PROTO_TREE, NULL, protocolinfo_packet, NULL);
1492 /* error, we failed to attach to the tap. complain and clean up */
1493 fprintf(stderr, "rawshark: Couldn't register field extraction tap: %s\n",
1495 g_string_free(error_string, TRUE);
1506 * Given a format string, split it into a GPtrArray of string_fmt_t structs
1507 * and fill in string_fmt_parts.
1511 add_string_fmt(string_fmt_e format, gchar *plain) {
1512 string_fmt_t *sf = (string_fmt_t *)g_malloc(sizeof(string_fmt_t));
1514 sf->format = format;
1515 sf->plain = g_strdup(plain);
1517 g_ptr_array_add(string_fmts, sf);
1521 parse_field_string_format(gchar *format) {
1522 GString *plain_s = g_string_new("");
1530 len = strlen(format);
1531 g_ptr_array_set_size(string_fmts, 0);
1534 if (format[pos] == '%') {
1535 if (pos >= len) { /* There should always be a following character */
1539 if (plain_s->len > 0) {
1540 add_string_fmt(SF_NONE, plain_s->str);
1541 g_string_truncate(plain_s, 0);
1543 switch (format[pos]) {
1545 add_string_fmt(SF_NAME, NULL);
1548 add_string_fmt(SF_NUMVAL, NULL);
1551 add_string_fmt(SF_STRVAL, NULL);
1554 g_string_append_c(plain_s, '%');
1556 default: /* Invalid format */
1560 g_string_append_c(plain_s, format[pos]);
1565 if (plain_s->len > 0) {
1566 add_string_fmt(SF_NONE, plain_s->str);
1568 g_string_free(plain_s, TRUE);
1572 /****************************************************************************************
1573 * END OF FIELD EXTRACTION ROUTINES
1574 ****************************************************************************************/
1577 show_print_file_io_error(int err)
1582 cmdarg_err("Not all the packets could be printed because there is "
1583 "no space left on the file system.");
1588 cmdarg_err("Not all the packets could be printed because you are "
1589 "too close to, or over your disk quota.");
1594 cmdarg_err("An error occurred while printing packets: %s.",
1601 * Open/create errors are reported with an console message in Rawshark.
1604 open_failure_message(const char *filename, int err, gboolean for_writing)
1606 fprintf(stderr, "rawshark: ");
1607 fprintf(stderr, file_open_error_message(err, for_writing), filename);
1608 fprintf(stderr, "\n");
1611 static const nstime_t *
1612 raw_get_frame_ts(void *data _U_, guint32 frame_num)
1614 if (ref && ref->num == frame_num)
1615 return &ref->abs_ts;
1617 if (prev_dis && prev_dis->num == frame_num)
1618 return &prev_dis->abs_ts;
1620 if (prev_cap && prev_cap->num == frame_num)
1621 return &prev_cap->abs_ts;
1627 raw_epan_new(capture_file *cf)
1629 epan_t *epan = epan_new();
1632 epan->get_frame_ts = raw_get_frame_ts;
1633 epan->get_interface_name = cap_file_get_interface_name;
1634 epan->get_user_comment = NULL;
1640 raw_cf_open(capture_file *cf, const char *fname)
1642 if ((fd = raw_pipe_open(fname)) < 0)
1645 /* The open succeeded. Fill in the information for this file. */
1647 /* Create new epan session for dissection. */
1648 epan_free(cf->epan);
1649 cf->epan = raw_epan_new(cf);
1652 cf->f_datalen = 0; /* not used, but set it anyway */
1654 /* Set the file name because we need it to set the follow stream filter.
1655 XXX - is that still true? We need it for other reasons, though,
1657 cf->filename = g_strdup(fname);
1659 /* Indicate whether it's a permanent or temporary file. */
1660 cf->is_tempfile = FALSE;
1662 /* No user changes yet. */
1663 cf->unsaved_changes = FALSE;
1665 cf->cd_t = WTAP_FILE_UNKNOWN;
1667 cf->drops_known = FALSE;
1669 cf->has_snap = FALSE;
1670 cf->snap = WTAP_MAX_PACKET_SIZE;
1671 nstime_set_zero(&cf->elapsed_time);
1681 * General errors are reported with an console message in Rawshark.
1684 failure_message(const char *msg_format, va_list ap)
1686 fprintf(stderr, "rawshark: ");
1687 vfprintf(stderr, msg_format, ap);
1688 fprintf(stderr, "\n");
1692 * Read errors are reported with an console message in Rawshark.
1695 read_failure_message(const char *filename, int err)
1697 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
1698 filename, g_strerror(err));
1702 * Write errors are reported with an console message in Rawshark.
1705 write_failure_message(const char *filename, int err)
1707 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
1708 filename, g_strerror(err));
1712 * Report an error in command-line arguments.
1715 cmdarg_err(const char *fmt, ...)
1720 fprintf(stderr, "rawshark: ");
1721 vfprintf(stderr, fmt, ap);
1722 fprintf(stderr, "\n");
1727 * Report additional information for an error in command-line arguments.
1730 cmdarg_err_cont(const char *fmt, ...)
1735 vfprintf(stderr, fmt, ap);
1736 fprintf(stderr, "\n");
1747 * indent-tabs-mode: nil
1750 * ex: set shiftwidth=4 tabstop=8 expandtab:
1751 * :indentSize=4:tabSize=8:noTabs=true: