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.h>
68 #include <epan/filesystem.h>
69 #include <wsutil/privileges.h>
70 #include <wsutil/file_util.h>
73 #include <epan/packet.h>
75 #include "disabled_protos.h"
76 #include <epan/prefs.h>
77 #include <epan/column.h>
79 #include <epan/addr_resolv.h>
81 #include "clopts_common.h"
82 #include "cmdarg_err.h"
83 #include "version_info.h"
84 #include <epan/plugins.h>
86 #include "conditions.h"
87 #include "capture_stop_conditions.h"
88 #include "capture_ui_utils.h"
89 #include <epan/epan_dissect.h>
90 #include <epan/stat_cmd_args.h>
91 #include <epan/timestamp.h>
92 #include <wsutil/unicode-utils.h>
93 #include "epan/column-utils.h"
94 #include "epan/proto.h"
97 #include <wiretap/wtap.h>
98 #include <wiretap/libpcap.h>
99 #include <wiretap/pcap-encap.h>
103 #include "capture-pcap-util.h"
105 #include "capture-wpcap.h"
107 #endif /* HAVE_LIBPCAP */
111 #include <wsutil/unicode-utils.h>
115 * This is the template for the decode as option; it is shared between the
116 * various functions that output the usage for this parameter.
118 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
120 static guint32 cum_bytes;
121 static nstime_t first_ts;
122 static frame_data *prev_dis;
123 static frame_data prev_dis_frame;
124 static frame_data *prev_cap;
125 static frame_data prev_cap_frame;
128 * The way the packet decode is to be written.
131 WRITE_TEXT, /* summary or detail text */
132 WRITE_XML /* PDML or PSML */
133 /* Add CSV and the like here */
136 static gboolean line_buffered;
137 static print_format_e print_format = PR_FMT_TEXT;
139 static gboolean want_pcap_pkthdr;
141 cf_status_t raw_cf_open(capture_file *cf, const char *fname);
142 static int load_cap_file(capture_file *cf);
143 static gboolean process_packet(capture_file *cf, gint64 offset,
144 struct wtap_pkthdr *whdr, const guchar *pd);
145 static void show_print_file_io_error(int err);
147 static void open_failure_message(const char *filename, int err,
148 gboolean for_writing);
149 static void failure_message(const char *msg_format, va_list ap);
150 static void read_failure_message(const char *filename, int err);
151 static void write_failure_message(const char *filename, int err);
152 static void protocolinfo_init(char *field);
153 static gboolean parse_field_string_format(char *format);
156 SF_NONE, /* No format (placeholder) */
157 SF_NAME, /* %D Field name / description */
158 SF_NUMVAL, /* %N Numeric value */
159 SF_STRVAL /* %S String value */
162 typedef struct string_fmt_s {
164 string_fmt_e format; /* Valid if plain is NULL */
170 dfilter_t *rfcodes[64];
172 dfilter_t *rfieldfcodes[64];
175 GPtrArray *string_fmts;
178 print_usage(gboolean print_ver)
185 "Rawshark " VERSION "%s\n"
186 "Dump and analyze network traffic.\n"
187 "See http://www.wireshark.org for more information.\n"
190 wireshark_svnversion, get_copyright_info());
194 fprintf(output, "\n");
195 fprintf(output, "Usage: rawshark [options] ...\n");
196 fprintf(output, "\n");
198 fprintf(output, "Input file:\n");
199 fprintf(output, " -r <infile> set the pipe or file name to read from\n");
201 fprintf(output, "\n");
202 fprintf(output, "Processing:\n");
203 fprintf(output, " -d <encap:dlt>|<proto:protoname>\n");
204 fprintf(output, " packet encapsulation or protocol\n");
205 fprintf(output, " -F <field> field to display\n");
206 fprintf(output, " -n disable all name resolution (def: all enabled)\n");
207 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
208 fprintf(output, " -p use the system's packet header format\n");
209 fprintf(output, " (which may have 64-bit timestamps)\n");
210 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
211 fprintf(output, " -s skip PCAP header on input\n");
213 fprintf(output, "\n");
214 fprintf(output, "Output:\n");
215 fprintf(output, " -l flush output after each packet\n");
216 fprintf(output, " -S format string for fields\n");
217 fprintf(output, " (%%D - name, %%S - stringval, %%N numval)\n");
218 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
220 fprintf(output, "\n");
221 fprintf(output, "Miscellaneous:\n");
222 fprintf(output, " -h display this help and exit\n");
223 fprintf(output, " -o <name>:<value> ... override preference setting\n");
224 fprintf(output, " -v display version info and exit\n");
228 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
229 const gchar *message _U_, gpointer user_data _U_)
234 * Open a pipe for raw input. This is a stripped-down version of
235 * pcap_loop.c:cap_pipe_open_live().
236 * We check if "pipe_name" is "-" (stdin) or a FIFO, and open it.
237 * @param pipe_name The name of the pipe or FIFO.
238 * @return A POSIX file descriptor on success, or -1 on failure.
241 raw_pipe_open(const char *pipe_name)
244 ws_statb64 pipe_stat;
246 char *pncopy, *pos = NULL;
253 g_log(LOG_DOMAIN_CAPTURE_CHILD, G_LOG_LEVEL_DEBUG, "open_raw_pipe: %s", pipe_name);
256 * XXX Rawshark blocks until we return
258 if (strcmp(pipe_name, "-") == 0) {
259 rfd = 0; /* read from stdin */
262 * This is needed to set the stdin pipe into binary mode, otherwise
263 * CR/LF are mangled...
265 _setmode(0, _O_BINARY);
269 if (ws_stat64(pipe_name, &pipe_stat) < 0) {
270 fprintf(stderr, "rawshark: The pipe %s could not be checked: %s\n",
271 pipe_name, g_strerror(errno));
274 if (! S_ISFIFO(pipe_stat.st_mode)) {
275 if (S_ISCHR(pipe_stat.st_mode)) {
277 * Assume the user specified an interface on a system where
278 * interfaces are in /dev. Pretend we haven't seen it.
282 fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",
287 rfd = ws_open(pipe_name, O_RDONLY | O_NONBLOCK, 0000 /* no creation so don't matter */);
289 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",
290 pipe_name, g_strerror(errno));
294 #define PIPE_STR "\\pipe\\"
295 /* Under Windows, named pipes _must_ have the form
296 * "\\<server>\pipe\<pipe_name>". <server> may be "." for localhost.
298 pncopy = g_strdup(pipe_name);
299 if (strstr(pncopy, "\\\\") == pncopy) {
300 pos = strchr(pncopy + 3, '\\');
301 if (pos && g_ascii_strncasecmp(pos, PIPE_STR, strlen(PIPE_STR)) != 0)
308 fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",
313 /* Wait for the pipe to appear */
315 hPipe = CreateFile(utf_8to16(pipe_name), GENERIC_READ, 0, NULL,
316 OPEN_EXISTING, 0, NULL);
318 if (hPipe != INVALID_HANDLE_VALUE)
321 err = GetLastError();
322 if (err != ERROR_PIPE_BUSY) {
323 FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS,
324 NULL, err, 0, (LPTSTR) &err_str, 0, NULL);
325 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s (error %d)\n",
326 pipe_name, utf_16to8(err_str), err);
331 if (!WaitNamedPipe(utf_8to16(pipe_name), 30 * 1000)) {
332 err = GetLastError();
333 FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS,
334 NULL, err, 0, (LPTSTR) &err_str, 0, NULL);
335 fprintf(stderr, "rawshark: \"%s\" could not be waited for: %s (error %d)\n",
336 pipe_name, utf_16to8(err_str), err);
342 rfd = _open_osfhandle((long) hPipe, _O_RDONLY);
344 fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",
345 pipe_name, g_strerror(errno));
355 * Parse a link-type argument of the form "encap:<pcap dlt>" or
356 * "proto:<proto name>". "Pcap dlt" must be a name conforming to
357 * pcap_datalink_name_to_val() or an integer. "Proto name" must be
358 * a protocol name, e.g. "http".
361 set_link_type(const char *lt_arg) {
362 char *spec_ptr = strchr(lt_arg, ':');
366 dissector_handle_t dhandle;
374 if (strncmp(lt_arg, "encap:", strlen("encap:")) == 0) {
375 dlt_val = linktype_name_to_val(spec_ptr);
378 val = strtol(spec_ptr, &p, 10);
379 if (p == spec_ptr || *p != '\0' || errno != 0 || val > INT_MAX) {
384 encap = wtap_pcap_encap_to_wtap_encap(dlt_val);
385 if (encap == WTAP_ENCAP_UNKNOWN) {
389 } else if (strncmp(lt_arg, "proto:", strlen("proto:")) == 0) {
390 dhandle = find_dissector(spec_ptr);
392 encap = WTAP_ENCAP_USER0;
393 pref_str = g_string_new("uat:user_dlts:");
394 /* This must match the format used in the user_dlts file */
395 g_string_append_printf(pref_str,
396 "\"User 0 (DLT=147)\",\"%s\",\"0\",\"\",\"0\",\"\"",
398 if (prefs_set_pref(pref_str->str) != PREFS_SET_OK) {
399 g_string_free(pref_str, TRUE);
402 g_string_free(pref_str, TRUE);
410 show_version(GString *comp_info_str, GString *runtime_info_str)
412 printf("Rawshark " VERSION "%s\n"
419 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
420 runtime_info_str->str);
424 main(int argc, char *argv[])
426 char *init_progfile_dir_error;
428 gboolean arg_error = FALSE;
434 char *gpf_path, *pf_path;
435 char *gdp_path, *dp_path;
436 int gpf_open_errno, gpf_read_errno;
437 int pf_open_errno, pf_read_errno;
438 int gdp_open_errno, gdp_read_errno;
439 int dp_open_errno, dp_read_errno;
441 gchar *pipe_name = NULL;
445 GLogLevelFlags log_flags;
446 GPtrArray *disp_fields = g_ptr_array_new();
448 gboolean skip_pcap_header = FALSE;
450 #define OPTSTRING_INIT "d:F:hlnN:o:pr:R:sS:t:v"
452 static const char optstring[] = OPTSTRING_INIT;
455 arg_list_utf_16to8(argc, argv);
459 * Get credential information for later use.
461 init_process_policies();
464 * Clear the filters arrays
466 memset(rfilters, 0, sizeof(rfilters));
467 memset(rfcodes, 0, sizeof(rfcodes));
472 * Initialize our string format
474 string_fmts = g_ptr_array_new();
477 * Attempt to get the pathname of the executable file.
479 init_progfile_dir_error = init_progfile_dir(argv[0], main);
480 if (init_progfile_dir_error != NULL) {
481 fprintf(stderr, "rawshark: Can't get pathname of rawshark program: %s.\n",
482 init_progfile_dir_error);
486 * Get credential information for later use.
488 init_process_policies();
490 /* nothing more than the standard GLib handler, but without a warning */
492 G_LOG_LEVEL_WARNING |
493 G_LOG_LEVEL_MESSAGE |
497 g_log_set_handler(NULL,
499 log_func_ignore, NULL /* user_data */);
500 g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
502 log_func_ignore, NULL /* user_data */);
504 timestamp_set_type(TS_RELATIVE);
505 timestamp_set_precision(TS_PREC_AUTO);
506 timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
508 /* Register all dissectors; we must do this before checking for the
509 "-G" flag, as the "-G" flag dumps information registered by the
510 dissectors, and we must do it before we read the preferences, in
511 case any dissectors register preferences. */
512 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
513 failure_message, open_failure_message, read_failure_message,
514 write_failure_message);
516 /* Set the C-language locale to the native environment. */
517 setlocale(LC_ALL, "");
519 prefs_p = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
520 &pf_open_errno, &pf_read_errno, &pf_path);
521 if (gpf_path != NULL) {
522 if (gpf_open_errno != 0) {
523 cmdarg_err("Can't open global preferences file \"%s\": %s.",
524 pf_path, g_strerror(gpf_open_errno));
526 if (gpf_read_errno != 0) {
527 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
528 pf_path, g_strerror(gpf_read_errno));
531 if (pf_path != NULL) {
532 if (pf_open_errno != 0) {
533 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
534 g_strerror(pf_open_errno));
536 if (pf_read_errno != 0) {
537 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
538 pf_path, g_strerror(pf_read_errno));
544 /* Read the disabled protocols file. */
545 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
546 &dp_path, &dp_open_errno, &dp_read_errno);
547 if (gdp_path != NULL) {
548 if (gdp_open_errno != 0) {
549 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
550 gdp_path, g_strerror(gdp_open_errno));
552 if (gdp_read_errno != 0) {
553 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
554 gdp_path, g_strerror(gdp_read_errno));
558 if (dp_path != NULL) {
559 if (dp_open_errno != 0) {
561 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
562 g_strerror(dp_open_errno));
564 if (dp_read_errno != 0) {
566 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
567 g_strerror(dp_read_errno));
573 /* Load Wpcap, if possible */
577 cap_file_init(&cfile);
579 /* Print format defaults to this. */
580 print_format = PR_FMT_TEXT;
582 /* Initialize our encapsulation type */
583 encap = WTAP_ENCAP_UNKNOWN;
585 /* Now get our args */
586 /* XXX - We should probably have an option to dump libpcap link types */
587 while ((opt = getopt(argc, argv, optstring)) != -1) {
589 case 'd': /* Payload type */
590 if (!set_link_type(optarg)) {
591 cmdarg_err("Invalid link type or protocol \"%s\"", optarg);
595 case 'F': /* Read field to display */
596 g_ptr_array_add(disp_fields, g_strdup(optarg));
598 case 'h': /* Print help and exit */
602 case 'l': /* "Line-buffer" standard output */
603 /* This isn't line-buffering, strictly speaking, it's just
604 flushing the standard output after the information for
605 each packet is printed; however, that should be good
606 enough for all the purposes to which "-l" is put (and
607 is probably actually better for "-V", as it does fewer
610 See the comment in "process_packet()" for an explanation of
611 why we do that, and why we don't just use "setvbuf()" to
612 make the standard output line-buffered (short version: in
613 Windows, "line-buffered" is the same as "fully-buffered",
614 and the output buffer is only flushed when it fills up). */
615 line_buffered = TRUE;
617 case 'n': /* No name resolution */
618 gbl_resolv_flags.mac_name = FALSE;
619 gbl_resolv_flags.network_name = FALSE;
620 gbl_resolv_flags.transport_name = FALSE;
621 gbl_resolv_flags.concurrent_dns = FALSE;
623 case 'N': /* Select what types of addresses/port #s to resolve */
624 badopt = string_to_name_resolve(optarg, &gbl_resolv_flags);
625 if (badopt != '\0') {
626 cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
631 case 'o': /* Override preference from command line */
632 switch (prefs_set_pref(optarg)) {
637 case PREFS_SET_SYNTAX_ERR:
638 cmdarg_err("Invalid -o flag \"%s\"", optarg);
642 case PREFS_SET_NO_SUCH_PREF:
643 case PREFS_SET_OBSOLETE:
644 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
649 case 'p': /* Expect pcap_pkthdr packet headers, which may have 64-bit timestamps */
650 want_pcap_pkthdr = TRUE;
652 case 'r': /* Read capture file xxx */
653 pipe_name = g_strdup(optarg);
655 case 'R': /* Read file filter */
656 if(n_rfilters < (int) sizeof(rfilters) / (int) sizeof(rfilters[0])) {
657 rfilters[n_rfilters++] = optarg;
660 cmdarg_err("Too many display filters");
664 case 's': /* Skip PCAP header */
665 skip_pcap_header = TRUE;
667 case 'S': /* Print string representations */
668 if (!parse_field_string_format(optarg)) {
669 cmdarg_err("Invalid field string format");
673 case 't': /* Time stamp type */
674 if (strcmp(optarg, "r") == 0)
675 timestamp_set_type(TS_RELATIVE);
676 else if (strcmp(optarg, "a") == 0)
677 timestamp_set_type(TS_ABSOLUTE);
678 else if (strcmp(optarg, "ad") == 0)
679 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
680 else if (strcmp(optarg, "d") == 0)
681 timestamp_set_type(TS_DELTA);
682 else if (strcmp(optarg, "dd") == 0)
683 timestamp_set_type(TS_DELTA_DIS);
684 else if (strcmp(optarg, "e") == 0)
685 timestamp_set_type(TS_EPOCH);
686 else if (strcmp(optarg, "u") == 0)
687 timestamp_set_type(TS_UTC);
688 else if (strcmp(optarg, "ud") == 0)
689 timestamp_set_type(TS_UTC_WITH_DATE);
691 cmdarg_err("Invalid time stamp type \"%s\"",
693 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
694 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
698 case 'v': /* Show version and exit */
700 GString *comp_info_str;
701 GString *runtime_info_str;
702 /* Assemble the compile-time version information string */
703 comp_info_str = g_string_new("Compiled ");
704 get_compiled_version_info(comp_info_str, NULL, epan_get_compiled_version_info);
706 /* Assemble the run-time version information string */
707 runtime_info_str = g_string_new("Running ");
708 get_runtime_version_info(runtime_info_str, NULL);
709 show_version(comp_info_str, runtime_info_str);
710 g_string_free(comp_info_str, TRUE);
711 g_string_free(runtime_info_str, TRUE);
716 case '?': /* Bad flag - print usage message */
723 /* Notify all registered modules that have had any of their preferences
724 changed either from one of the preferences file or from the command
725 line that their preferences have changed.
726 Initialize preferences before display filters, otherwise modules
727 like MATE won't work. */
730 /* Initialize our display fields */
731 for (fc = 0; fc < disp_fields->len; fc++) {
732 protocolinfo_init((char *)g_ptr_array_index(disp_fields, fc));
734 g_ptr_array_free(disp_fields, TRUE);
738 /* If no capture filter or read filter has been specified, and there are
739 still command-line arguments, treat them as the tokens of a capture
740 filter (if no "-r" flag was specified) or a read filter (if a "-r"
741 flag was specified. */
743 if (pipe_name != NULL) {
744 if (n_rfilters != 0) {
745 cmdarg_err("Read filters were specified both with \"-R\" "
746 "and with additional command-line arguments");
749 rfilters[n_rfilters] = get_args_as_string(argc, argv, optind);
753 /* Make sure we got a dissector handle for our payload. */
754 if (encap == WTAP_ENCAP_UNKNOWN) {
755 cmdarg_err("No valid payload dissector specified.");
766 /* Start windows sockets */
767 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
770 /* At this point MATE will have registered its field array so we can
771 have a tap filter with one of MATE's late-registered fields as part
772 of the filter. We can now process all the "-z" arguments. */
773 start_requested_stats();
775 /* disabled protocols as per configuration file */
776 if (gdp_path == NULL && dp_path == NULL) {
777 set_disabled_protos_list();
780 /* Build the column format array */
781 build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE);
783 if (n_rfilters != 0) {
784 for (i = 0; i < n_rfilters; i++) {
785 if (!dfilter_compile(rfilters[i], &rfcodes[n_rfcodes])) {
786 cmdarg_err("%s", dfilter_error_msg);
796 * We're reading a pipe (or capture file).
800 * Immediately relinquish any special privileges we have; we must not
801 * be allowed to read any capture files the user running Rawshark
804 relinquish_special_privs_perm();
806 if (raw_cf_open(&cfile, pipe_name) != CF_OK) {
811 /* Do we need to PCAP header and magic? */
812 if (skip_pcap_header) {
813 guint bytes_left = sizeof(struct pcap_hdr) + sizeof(guint32);
814 gchar buf[sizeof(struct pcap_hdr) + sizeof(guint32)];
815 while (bytes_left > 0) {
816 guint bytes = read(fd, buf, bytes_left);
818 cmdarg_err("Not enough bytes for pcap header.");
825 /* Set timestamp precision; there should arguably be a command-line
826 option to let the user set this. */
828 switch(wtap_file_tsprecision(cfile.wth)) {
829 case(WTAP_FILE_TSPREC_SEC):
830 timestamp_set_precision(TS_PREC_AUTO_SEC);
832 case(WTAP_FILE_TSPREC_DSEC):
833 timestamp_set_precision(TS_PREC_AUTO_DSEC);
835 case(WTAP_FILE_TSPREC_CSEC):
836 timestamp_set_precision(TS_PREC_AUTO_CSEC);
838 case(WTAP_FILE_TSPREC_MSEC):
839 timestamp_set_precision(TS_PREC_AUTO_MSEC);
841 case(WTAP_FILE_TSPREC_USEC):
842 timestamp_set_precision(TS_PREC_AUTO_USEC);
844 case(WTAP_FILE_TSPREC_NSEC):
845 timestamp_set_precision(TS_PREC_AUTO_NSEC);
848 g_assert_not_reached();
851 timestamp_set_precision(TS_PREC_AUTO_USEC);
854 /* Process the packets in the file */
855 err = load_cap_file(&cfile);
862 /* If you want to capture live packets, use TShark. */
863 cmdarg_err("Input file or pipe name not specified.");
873 * Read data from a raw pipe. The "raw" data consists of a libpcap
874 * packet header followed by the payload.
875 * @param fd [IN] A POSIX file descriptor. Because that's _exactly_ the sort
876 * of thing you want to use in Windows.
877 * @param phdr [OUT] Packet header information.
878 * @param err [OUT] Error indicator. Uses wiretap values.
879 * @param err_info [OUT] Error message.
880 * @param data_offset [OUT] data offset in the pipe.
881 * @return TRUE on success, FALSE on failure.
884 raw_pipe_read(struct wtap_pkthdr *phdr, guchar * pd, int *err, const gchar **err_info, gint64 *data_offset) {
885 struct pcap_pkthdr mem_hdr;
886 struct pcaprec_hdr disk_hdr;
888 int bytes_needed = sizeof(disk_hdr);
889 guchar *ptr = (guchar*) &disk_hdr;
890 static gchar err_str[100];
892 if (want_pcap_pkthdr) {
893 bytes_needed = sizeof(mem_hdr);
894 ptr = (guchar*) &mem_hdr;
897 /* Copied from capture_loop.c */
898 while (bytes_needed > 0) {
899 bytes_read = read(fd, ptr, bytes_needed);
900 if (bytes_read == 0) {
903 } else if (bytes_read < 0) {
904 *err = WTAP_ERR_CANT_READ;
905 *err_info = "Error reading header from pipe";
908 bytes_needed -= bytes_read;
909 *data_offset += bytes_read;
913 if (want_pcap_pkthdr) {
914 phdr->ts.secs = mem_hdr.ts.tv_sec;
915 phdr->ts.nsecs = mem_hdr.ts.tv_usec * 1000;
916 phdr->caplen = bytes_needed = mem_hdr.caplen;
917 phdr->len = mem_hdr.len;
919 phdr->ts.secs = disk_hdr.ts_sec;
920 phdr->ts.nsecs = disk_hdr.ts_usec * 1000;
921 phdr->caplen = bytes_needed = disk_hdr.incl_len;
922 phdr->len = disk_hdr.orig_len;
925 phdr->pkt_encap = encap;
928 printf("tv_sec: %d (%04x)\n", hdr.ts.tv_sec, hdr.ts.tv_sec);
929 printf("tv_usec: %d (%04x)\n", hdr.ts.tv_usec, hdr.ts.tv_usec);
930 printf("caplen: %d (%04x)\n", hdr.caplen, hdr.caplen);
931 printf("len: %d (%04x)\n", hdr.len, hdr.len);
933 if (bytes_needed > WTAP_MAX_PACKET_SIZE) {
934 *err = WTAP_ERR_BAD_FILE;
935 g_snprintf(err_str, 100, "Bad packet length: %d (%04x)", bytes_needed, bytes_needed);
941 while (bytes_needed > 0) {
942 bytes_read = read(fd, ptr, bytes_needed);
943 if (bytes_read == 0) {
944 *err = WTAP_ERR_SHORT_READ;
945 *err_info = "Got zero bytes reading data from pipe";
947 } else if (bytes_read < 0) {
948 *err = WTAP_ERR_CANT_READ;
949 *err_info = "Error reading data from pipe";
952 bytes_needed -= bytes_read;
953 *data_offset += bytes_read;
960 load_cap_file(capture_file *cf)
963 const gchar *err_info;
964 gint64 data_offset = 0;
965 struct wtap_pkthdr phdr;
966 guchar pd[WTAP_MAX_PACKET_SIZE];
968 while (raw_pipe_read(&phdr, pd, &err, &err_info, &data_offset)) {
969 process_packet(cf, data_offset, &phdr, pd);
973 /* Print a message noting that the read failed somewhere along the line. */
976 case WTAP_ERR_UNSUPPORTED_ENCAP:
977 cmdarg_err("The file \"%s\" has a packet with a network type that Rawshark doesn't support.\n(%s)",
978 cf->filename, err_info);
981 case WTAP_ERR_CANT_READ:
982 cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.",
986 case WTAP_ERR_SHORT_READ:
987 cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.",
991 case WTAP_ERR_BAD_FILE:
992 cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)",
993 cf->filename, err_info);
996 case WTAP_ERR_DECOMPRESS:
997 cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n(%s)",
998 cf->filename, err_info);
1002 cmdarg_err("An error occurred while reading the file \"%s\": %s.",
1003 cf->filename, wtap_strerror(err));
1012 process_packet(capture_file *cf, gint64 offset, struct wtap_pkthdr *whdr,
1016 gboolean create_proto_tree;
1023 /* The user sends an empty packet when he wants to get output from us even if we don't currently have
1024 packets to process. We spit out a line with the timestamp and the text "void"
1026 printf("%lu %lu %lu void -\n", (unsigned long int)cf->count,
1027 (unsigned long int)whdr->ts.secs,
1028 (unsigned long int)whdr->ts.nsecs);
1035 /* Count this packet. */
1038 /* If we're going to print packet information, or we're going to
1039 run a read filter, or we're going to process taps, set up to
1040 do a dissection and do so. */
1041 frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
1044 create_proto_tree = TRUE;
1046 /* The protocol tree will be "visible", i.e., printed, only if we're
1047 printing packet details, which is true if we're in verbose mode ("verbose"
1049 epan_dissect_init(&edt, create_proto_tree, FALSE);
1051 /* If we're running a read filter, prime the epan_dissect_t with that
1053 if (n_rfilters > 0) {
1054 for(i = 0; i < n_rfcodes; i++) {
1055 epan_dissect_prime_dfilter(&edt, rfcodes[i]);
1059 printf("%lu", (unsigned long int) cf->count);
1061 frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
1062 &first_ts, prev_dis, prev_cap);
1064 /* We only need the columns if we're printing packet info but we're
1065 *not* verbose; in verbose mode, we print the protocol tree, not
1066 the protocol summary. */
1067 epan_dissect_run_with_taps(&edt, whdr, pd, &fdata, &cf->cinfo);
1069 frame_data_set_after_dissect(&fdata, &cum_bytes);
1070 prev_dis_frame = fdata;
1071 prev_dis = &prev_dis_frame;
1073 prev_cap_frame = fdata;
1074 prev_cap = &prev_cap_frame;
1076 for(i = 0; i < n_rfilters; i++) {
1077 /* Run the read filter if we have one. */
1079 passed = dfilter_apply_edt(rfcodes[i], &edt);
1083 /* Print a one-line summary */
1084 printf(" %u", passed ? 1 : 0);
1089 /* The ANSI C standard does not appear to *require* that a line-buffered
1090 stream be flushed to the host environment whenever a newline is
1091 written, it just says that, on such a stream, characters "are
1092 intended to be transmitted to or from the host environment as a
1093 block when a new-line character is encountered".
1095 The Visual C++ 6.0 C implementation doesn't do what is intended;
1096 even if you set a stream to be line-buffered, it still doesn't
1097 flush the buffer at the end of every line.
1099 So, if the "-l" flag was specified, we flush the standard output
1100 at the end of a packet. This will do the right thing if we're
1101 printing packet summary lines, and, as we print the entire protocol
1102 tree for a single packet without waiting for anything to happen,
1103 it should be as good as line-buffered mode if we're printing
1104 protocol trees. (The whole reason for the "-l" flag in either
1105 tcpdump or Rawshark is to allow the output of a live capture to
1106 be piped to a program or script and to have that script see the
1107 information for the packet as soon as it's printed, rather than
1108 having to wait until a standard I/O buffer fills up. */
1112 if (ferror(stdout)) {
1113 show_print_file_io_error(errno);
1117 epan_dissect_cleanup(&edt);
1118 frame_data_cleanup(&fdata);
1123 /****************************************************************************************
1124 * FIELD EXTRACTION ROUTINES
1125 ****************************************************************************************/
1126 typedef struct _pci_t {
1132 static const char* ftenum_to_string(header_field_info *hfi)
1138 if (string_fmts->len > 0 && hfi->strings) {
1146 return "FT_PROTOCOL";
1148 return "FT_BOOLEAN";
1173 case FT_ABSOLUTE_TIME:
1174 return "FT_ABSOLUTE_TIME";
1175 case FT_RELATIVE_TIME:
1176 return "FT_RELATIVE_TIME";
1180 return "FT_STRINGZ";
1181 case FT_UINT_STRING:
1182 return "FT_UINT_STRING";
1188 return "FT_UINT_BYTES";
1196 return "FT_FRAMENUM";
1204 return "FT_NUM_TYPES";
1210 static const char* absolute_time_display_e_to_string(absolute_time_display_e atd)
1213 case ABSOLUTE_TIME_LOCAL:
1214 return "ABSOLUTE_TIME_LOCAL";
1215 case ABSOLUTE_TIME_UTC:
1216 return "ABSOLUTE_TIME_UTC";
1222 static const char* base_display_e_to_string(base_display_e bd)
1234 return "BASE_DEC_HEX";
1236 return "BASE_HEX_DEC";
1243 * Copied from various parts of proto.c
1245 #define FIELD_STR_INIT_LEN 256
1246 #define cVALS(x) (const value_string*)(x)
1247 static gboolean print_field_value(field_info *finfo, int cmd_line_index)
1249 header_field_info *hfinfo;
1250 static char *fs_buf = NULL;
1251 char *fs_ptr = fs_buf;
1252 static GString *label_s = NULL;
1253 int fs_buf_len = FIELD_STR_INIT_LEN, fs_len;
1258 const true_false_string *tfstring = &tfs_true_false;
1260 hfinfo = finfo->hfinfo;
1263 fs_buf = (char *)g_malloc(fs_buf_len + 1);
1268 label_s = g_string_new("");
1271 if(finfo->value.ftype->val_to_string_repr)
1274 * this field has an associated value,
1277 fs_len = fvalue_string_repr_len(&finfo->value, FTREPR_DFILTER);
1278 while (fs_buf_len < fs_len) {
1280 fs_buf = (char *)g_realloc(fs_buf, fs_buf_len + 1);
1283 fvalue_to_string_repr(&finfo->value,
1287 /* String types are quoted. Remove them. */
1288 if ((finfo->value.ftype->ftype == FT_STRING || finfo->value.ftype->ftype == FT_STRINGZ) && fs_len > 2) {
1289 fs_buf[fs_len - 1] = '\0';
1294 if (string_fmts->len > 0 && finfo->hfinfo->strings) {
1295 g_string_truncate(label_s, 0);
1296 for (i = 0; i < string_fmts->len; i++) {
1297 sf = (string_fmt_t *)g_ptr_array_index(string_fmts, i);
1299 g_string_append(label_s, sf->plain);
1301 switch (sf->format) {
1303 g_string_append(label_s, hfinfo->name);
1306 g_string_append(label_s, fs_ptr);
1309 switch(hfinfo->type) {
1311 uvalue = fvalue_get_uinteger(&finfo->value);
1312 tfstring = (const struct true_false_string*) hfinfo->strings;
1313 g_string_append(label_s, uvalue ? tfstring->true_string : tfstring->false_string);
1319 DISSECTOR_ASSERT(!hfinfo->bitmask);
1320 svalue = fvalue_get_sinteger(&finfo->value);
1321 if (hfinfo->display & BASE_RANGE_STRING) {
1322 g_string_append(label_s, rval_to_str(svalue, RVALS(hfinfo->strings), "Unknown"));
1323 } else if (hfinfo->display & BASE_EXT_STRING) {
1324 g_string_append(label_s, val_to_str_ext(svalue, (const value_string_ext *) hfinfo->strings, "Unknown"));
1326 g_string_append(label_s, val_to_str(svalue, cVALS(hfinfo->strings), "Unknown"));
1333 uvalue = fvalue_get_uinteger(&finfo->value);
1334 if (!hfinfo->bitmask && hfinfo->display & BASE_RANGE_STRING) {
1335 g_string_append(label_s, rval_to_str(uvalue, RVALS(hfinfo->strings), "Unknown"));
1336 } else if (hfinfo->display & BASE_EXT_STRING) {
1337 g_string_append(label_s, val_to_str_ext(uvalue, (const value_string_ext *) hfinfo->strings, "Unknown"));
1339 g_string_append(label_s, val_to_str(uvalue, cVALS(hfinfo->strings), "Unknown"));
1351 printf(" %u=\"%s\"", cmd_line_index, label_s->str);
1355 if(finfo->value.ftype->val_to_string_repr)
1357 printf(" %u=\"%s\"", cmd_line_index, fs_ptr);
1362 * This field doesn't have an associated value,
1366 printf(" %u=\"n.a.\"", cmd_line_index);
1371 protocolinfo_packet(void *prs, packet_info *pinfo _U_, epan_dissect_t *edt, const void *dummy _U_)
1373 pci_t *rs=(pci_t *)prs;
1377 gp=proto_get_finfo_ptr_array(edt->tree, rs->hf_index);
1384 * Print each occurrence of the field
1386 for (i = 0; i < gp->len; i++) {
1387 print_field_value((field_info *)gp->pdata[i], rs->cmd_line_index);
1393 int g_cmd_line_index = 0;
1396 * field must be persistent - we don't g_strdup() it below
1399 protocolinfo_init(char *field)
1402 header_field_info *hfi;
1403 GString *error_string;
1405 hfi=proto_registrar_get_byname(field);
1407 fprintf(stderr, "rawshark: Field \"%s\" doesn't exist.\n", field);
1411 switch (hfi->type) {
1413 case FT_ABSOLUTE_TIME:
1414 printf("%u %s %s - ",
1416 ftenum_to_string(hfi),
1417 absolute_time_display_e_to_string(hfi->display));
1421 printf("%u %s %s - ",
1423 ftenum_to_string(hfi),
1424 base_display_e_to_string(hfi->display));
1428 rs=(pci_t *)g_malloc(sizeof(pci_t));
1429 rs->hf_index=hfi->id;
1431 rs->cmd_line_index = g_cmd_line_index++;
1433 error_string=register_tap_listener("frame", rs, rs->filter, TL_REQUIRES_PROTO_TREE, NULL, protocolinfo_packet, NULL);
1435 /* error, we failed to attach to the tap. complain and clean up */
1436 fprintf(stderr, "rawshark: Couldn't register field extraction tap: %s\n",
1438 g_string_free(error_string, TRUE);
1449 * Given a format string, split it into a GPtrArray of string_fmt_t structs
1450 * and fill in string_fmt_parts.
1454 add_string_fmt(string_fmt_e format, gchar *plain) {
1455 string_fmt_t *sf = (string_fmt_t *)g_malloc(sizeof(string_fmt_t));
1457 sf->format = format;
1458 sf->plain = g_strdup(plain);
1460 g_ptr_array_add(string_fmts, sf);
1464 parse_field_string_format(gchar *format) {
1465 GString *plain_s = g_string_new("");
1473 len = strlen(format);
1474 g_ptr_array_set_size(string_fmts, 0);
1477 if (format[pos] == '%') {
1478 if (pos >= len) { /* There should always be a following character */
1482 if (plain_s->len > 0) {
1483 add_string_fmt(SF_NONE, plain_s->str);
1484 g_string_truncate(plain_s, 0);
1486 switch (format[pos]) {
1488 add_string_fmt(SF_NAME, NULL);
1491 add_string_fmt(SF_NUMVAL, NULL);
1494 add_string_fmt(SF_STRVAL, NULL);
1497 g_string_append_c(plain_s, '%');
1499 default: /* Invalid format */
1503 g_string_append_c(plain_s, format[pos]);
1508 if (plain_s->len > 0) {
1509 add_string_fmt(SF_NONE, plain_s->str);
1511 g_string_free(plain_s, TRUE);
1515 /****************************************************************************************
1516 * END OF FIELD EXTRACTION ROUTINES
1517 ****************************************************************************************/
1520 show_print_file_io_error(int err)
1525 cmdarg_err("Not all the packets could be printed because there is "
1526 "no space left on the file system.");
1531 cmdarg_err("Not all the packets could be printed because you are "
1532 "too close to, or over your disk quota.");
1537 cmdarg_err("An error occurred while printing packets: %s.",
1544 * Open/create errors are reported with an console message in Rawshark.
1547 open_failure_message(const char *filename, int err, gboolean for_writing)
1549 fprintf(stderr, "rawshark: ");
1550 fprintf(stderr, file_open_error_message(err, for_writing), filename);
1551 fprintf(stderr, "\n");
1555 raw_cf_open(capture_file *cf, const char *fname)
1557 if ((fd = raw_pipe_open(fname)) < 0)
1560 /* The open succeeded. Fill in the information for this file. */
1562 /* Cleanup all data structures used for dissection. */
1563 cleanup_dissection();
1564 /* Initialize all data structures used for dissection. */
1568 cf->f_datalen = 0; /* not used, but set it anyway */
1570 /* Set the file name because we need it to set the follow stream filter.
1571 XXX - is that still true? We need it for other reasons, though,
1573 cf->filename = g_strdup(fname);
1575 /* Indicate whether it's a permanent or temporary file. */
1576 cf->is_tempfile = FALSE;
1578 /* No user changes yet. */
1579 cf->unsaved_changes = FALSE;
1581 cf->cd_t = WTAP_FILE_UNKNOWN;
1583 cf->drops_known = FALSE;
1585 cf->has_snap = FALSE;
1586 cf->snap = WTAP_MAX_PACKET_SIZE;
1587 nstime_set_zero(&cf->elapsed_time);
1588 nstime_set_unset(&first_ts);
1597 * General errors are reported with an console message in Rawshark.
1600 failure_message(const char *msg_format, va_list ap)
1602 fprintf(stderr, "rawshark: ");
1603 vfprintf(stderr, msg_format, ap);
1604 fprintf(stderr, "\n");
1608 * Read errors are reported with an console message in Rawshark.
1611 read_failure_message(const char *filename, int err)
1613 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
1614 filename, g_strerror(err));
1618 * Write errors are reported with an console message in Rawshark.
1621 write_failure_message(const char *filename, int err)
1623 cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
1624 filename, g_strerror(err));
1628 * Report an error in command-line arguments.
1631 cmdarg_err(const char *fmt, ...)
1636 fprintf(stderr, "rawshark: ");
1637 vfprintf(stderr, fmt, ap);
1638 fprintf(stderr, "\n");
1643 * Report additional information for an error in command-line arguments.
1646 cmdarg_err_cont(const char *fmt, ...)
1651 vfprintf(stderr, fmt, ap);
1652 fprintf(stderr, "\n");
1663 * indent-tabs-mode: nil
1666 * ex: set shiftwidth=4 tabstop=8 expandtab:
1667 * :indentSize=4:tabSize=8:noTabs=true: