/* tshark.c
+ *
+ * Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
+ * by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
*
* $Id$
*
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
- * Text-mode variant, by Gilbert Ramirez <gram@alumni.rice.edu>
- * and Guy Harris <guy@alum.mit.edu>.
- *
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
#include "strerror.h"
#endif
-#ifdef NEED_GETOPT_H
-#include "getopt.h"
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+#include "wsgetopt.h"
#endif
#include <glib.h>
#include <epan/epan.h>
#include <epan/filesystem.h>
-#include <epan/privileges.h>
-#include <wiretap/file_util.h>
+#include <wsutil/privileges.h>
#include "globals.h"
#include <epan/timestamp.h>
#include "clopts_common.h"
#include "cmdarg_err.h"
#include "version_info.h"
-#include <epan/conversation.h>
#include <epan/plugins.h>
#include "register.h"
-#include "conditions.h"
-#include "capture_stop_conditions.h"
-#include "ringbuffer.h"
-#include "capture_ui_utils.h"
#include <epan/epan_dissect.h>
#include <epan/tap.h>
#include <epan/stat_cmd_args.h>
#include <epan/ex-opt.h>
#ifdef HAVE_LIBPCAP
+#include "capture_ui_utils.h"
#include <pcap.h>
-#include <setjmp.h>
#include "capture-pcap-util.h"
-#include "pcapio.h"
-#include <wiretap/wtap-capture.h>
#ifdef _WIN32
#include "capture-wpcap.h"
#include "capture_errs.h"
#endif /* _WIN32 */
-#include "capture.h"
-#include "capture_loop.h"
#include "capture_sync.h"
#endif /* HAVE_LIBPCAP */
-#include "epan/emem.h"
#include "log.h"
#include <epan/funnel.h>
+
/*
* This is the template for the decode as option; it is shared between the
* various functions that output the usage for this parameter.
*/
static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
+static guint32 cum_bytes;
static nstime_t first_ts;
-static nstime_t prev_ts;
-static GString *comp_info_str, *runtime_info_str;
+static nstime_t prev_dis_ts;
+static nstime_t prev_cap_ts;
static gboolean print_packet_info; /* TRUE if we're to print packet information */
+
+static gboolean perform_two_pass_analysis;
+
/*
* The way the packet decode is to be written.
*/
typedef enum {
WRITE_TEXT, /* summary or detail text */
- WRITE_XML /* PDML or PSML */
+ WRITE_XML, /* PDML or PSML */
+ WRITE_FIELDS /* User defined list of fields */
/* Add CSV and the like here */
} output_action_e;
+
static output_action_e output_action;
static gboolean do_dissection; /* TRUE if we have to dissect each packet */
static gboolean verbose;
static gboolean print_hex;
static gboolean line_buffered;
-static guint32 cum_bytes = 0;
+
static print_format_e print_format = PR_FMT_TEXT;
static print_stream_t *print_stream;
+static output_fields_t* output_fields = NULL;
+
/*
* Standard secondary message for unexpected errors.
*/
static gboolean print_packet_counts;
-static loop_data ld;
-
-#ifdef HAVE_LIBPCAP
-static capture_options capture_opts;
-
+static capture_options global_capture_opts;
#ifdef SIGINFO
static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
#endif /* SIGINFO */
-#endif /* HAVE_LIBPCAP */
-
static int capture(void);
-static void capture_pcap_cb(u_char *, const struct pcap_pkthdr *,
- const u_char *);
static void report_counts(void);
#ifdef _WIN32
static BOOL WINAPI capture_cleanup(DWORD);
#endif /* _WIN32 */
#endif /* HAVE_LIBPCAP */
-static int load_cap_file(capture_file *, char *, int);
+static int load_cap_file(capture_file *, char *, int, int, gint64);
static gboolean process_packet(capture_file *cf, gint64 offset,
const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
- const guchar *pd);
+ const guchar *pd, gboolean filtering_tap_listeners, guint tap_flags);
static void show_capture_file_io_error(const char *, int, gboolean);
static void show_print_file_io_error(int err);
static gboolean write_preamble(capture_file *cf);
gboolean for_writing);
static void failure_message(const char *msg_format, va_list ap);
static void read_failure_message(const char *filename, int err);
+static void write_failure_message(const char *filename, int err);
capture_file cfile;
+void
+cf_mark_frame(capture_file *cf _U_, frame_data *frame _U_)
+{
+ g_assert_not_reached();
+}
static void list_capture_types(void) {
int i;
"See http://www.wireshark.org for more information.\n"
"\n"
"%s",
- svnversion, get_copyright_info());
+ wireshark_svnversion, get_copyright_info());
} else {
output = stderr;
}
/*fprintf(output, "\n");*/
fprintf(output, "Output:\n");
- fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\n");
+ fprintf(output, " -w <outfile|-> write packets to a pcap-format file named \"outfile\"\n");
+ fprintf(output, " (or to the standard output for \"-\")\n");
+ fprintf(output, " -C <config profile> start with specified configuration profile\n");
fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
fprintf(output, " an empty \"-F\" option will list the file types\n");
fprintf(output, " -V add output of packet tree (Packet Details)\n");
fprintf(output, " -S display packets even when writing to a file\n");
fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
- fprintf(output, " -T pdml|ps|psml|text output format of text output (def: text)\n");
- fprintf(output, " -t ad|a|r|d|e output format of time stamps (def: r: rel. to first)\n");
- fprintf(output, " -l flush output after each packet\n");
+ fprintf(output, " -T pdml|ps|psml|text|fields\n");
+ fprintf(output, " format of text output (def: text)\n");
+ fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
+ fprintf(output, " this option can be repeated to print multiple fields\n");
+ fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
+ fprintf(output, " header=y|n switch headers on and off\n");
+ fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
+ fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
+ fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
+ fprintf(output, " -l flush standard output after each packet\n");
fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
fprintf(output, " -h display this help and exit\n");
fprintf(output, " -v display version info and exit\n");
fprintf(output, " -o <name>:<value> ... override preference setting\n");
+ fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n");
}
/*
* descriptive name.
*/
static void
-display_dissector_table_names(char *table_name, const char *ui_name,
+display_dissector_table_names(const char *table_name, const char *ui_name,
gpointer output)
{
fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
ftenum_t dissector_table_selector_type;
struct protocol_name_search user_protocol_name;
-/* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
+ /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
g_assert(cl_param);
- decoded_param = g_malloc( sizeof(gchar) * (strlen(cl_param) + 1) ); /* Allocate enough space to have a working copy of the command-line parameter */
+ decoded_param = g_strdup(cl_param);
g_assert(decoded_param);
- strcpy(decoded_param, cl_param);
/* The lines below will parse this string (modifying it) to extract all
case FT_STRING:
case FT_STRINGZ:
+ case FT_EBCDIC:
/* The selector for this table is a string. */
break;
case FT_STRING:
case FT_STRINGZ:
+ case FT_EBCDIC:
/* The selector for this table is a string. */
dissector_change_string(table_name, selector_str, dissector_matching);
break;
}
static void
-log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
- const gchar *message _U_, gpointer user_data _U_)
+tshark_log_handler (const gchar *log_domain, GLogLevelFlags log_level,
+ const gchar *message, gpointer user_data)
{
+ /* ignore log message, if log_level isn't interesting based
+ upon the console log preferences.
+ If the preferences haven't been loaded loaded yet, display the
+ message anyway.
+
+ The default console_log_level preference value is such that only
+ ERROR, CRITICAL and WARNING level messages are processed;
+ MESSAGE, INFO and DEBUG level messages are ignored.
+
+ XXX: Aug 07, 2009: Prior tshark g_log code was hardwired to process only
+ ERROR and CRITICAL level messages so the current code is a behavioral
+ change. The current behavior is the same as in Wireshark.
+ */
+ if((log_level & G_LOG_LEVEL_MASK & prefs.console_log_level) == 0 &&
+ prefs.console_log_level != 0) {
+ return;
+ }
+
+ g_log_default_handler(log_domain, log_level, message, user_data);
+
}
static char *
return save_file_string;
}
+static void
+print_current_user(void) {
+ gchar *cur_user, *cur_group;
+ if (started_with_special_privs()) {
+ cur_user = get_cur_username();
+ cur_group = get_cur_groupname();
+ fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
+ cur_user, cur_group);
+ g_free(cur_user);
+ g_free(cur_group);
+ if (running_with_special_privs()) {
+ fprintf(stderr, " This could be dangerous.");
+ }
+ fprintf(stderr, "\n");
+ }
+}
+
+static void
+check_capture_privs(void) {
+#ifdef _WIN32
+ load_wpcap();
+ /* Warn the user if npf.sys isn't loaded. */
+ if (!npf_sys_is_running() && get_os_major_version() >= 6) {
+ fprintf(stderr, "The NPF driver isn't running. You may have trouble "
+ "capturing or\nlisting interfaces.\n");
+ }
+#endif
+}
+
+static void
+show_version(GString *comp_info_str, GString *runtime_info_str)
+{
+ printf("TShark " VERSION "%s\n"
+ "\n"
+ "%s"
+ "\n"
+ "%s"
+ "\n"
+ "%s",
+ wireshark_svnversion, get_copyright_info(), comp_info_str->str,
+ runtime_info_str->str);
+}
+
int
main(int argc, char *argv[])
{
char *init_progfile_dir_error;
- int opt, i;
- extern char *optarg;
+ int opt;
gboolean arg_error = FALSE;
#ifdef _WIN32
#ifdef HAVE_LIBPCAP
gboolean list_link_layer_types = FALSE;
gboolean start_capture = FALSE;
+ int status;
#else
gboolean capture_option_specified = FALSE;
#endif
e_prefs *prefs;
char badopt;
GLogLevelFlags log_flags;
- int status;
int optind_initial;
-#define OPTSTRING_INIT "a:b:c:d:Df:F:G:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
+#define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:K:lLnN:o:pPqr:R:s:St:T:vVw:xX:y:z:"
#ifdef HAVE_LIBPCAP
#ifdef _WIN32
#define OPTSTRING_WIN32 "B:"
static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
- /*
- * Attempt to get the pathname of the executable file.
- */
- init_progfile_dir_error = init_progfile_dir(argv[0]);
- if (init_progfile_dir_error != NULL) {
- fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
- init_progfile_dir_error);
- }
-
/*
* Get credential information for later use.
*/
get_credential_info();
/*
- * Now attempt to get the pathname of the plugins.
+ * Attempt to get the pathname of the executable file.
*/
- init_plugin_dir();
+ init_progfile_dir_error = init_progfile_dir(argv[0], main);
+ if (init_progfile_dir_error != NULL) {
+ fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
+ init_progfile_dir_error);
+ }
/*
* In order to have the -X opts assigned before the wslua machine starts
*/
opterr = 0;
optind_initial = optind;
-
+
while ((opt = getopt(argc, argv, optstring)) != -1) {
switch (opt) {
+ case 'C': /* Configuration Profile */
+ if (profile_exists (optarg)) {
+ set_profile_name (optarg);
+ } else {
+ cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
+ exit(1);
+ }
+ break;
case 'X':
ex_opt_add(optarg);
break;
break;
}
}
-
+
optind = optind_initial;
opterr = 1;
- /* nothing more than the standard GLib handler, but without a warning */
+
+
+/** Send All g_log messages to our own handler **/
+
log_flags =
+ G_LOG_LEVEL_ERROR|
+ G_LOG_LEVEL_CRITICAL|
G_LOG_LEVEL_WARNING|
G_LOG_LEVEL_MESSAGE|
G_LOG_LEVEL_INFO|
- G_LOG_LEVEL_DEBUG;
+ G_LOG_LEVEL_DEBUG|
+ G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
g_log_set_handler(NULL,
log_flags,
- log_func_ignore, NULL /* user_data */);
+ tshark_log_handler, NULL /* user_data */);
+ g_log_set_handler(LOG_DOMAIN_MAIN,
+ log_flags,
+ tshark_log_handler, NULL /* user_data */);
+
+#ifdef HAVE_LIBPCAP
+ g_log_set_handler(LOG_DOMAIN_CAPTURE,
+ log_flags,
+ tshark_log_handler, NULL /* user_data */);
g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
log_flags,
- log_func_ignore, NULL /* user_data */);
+ tshark_log_handler, NULL /* user_data */);
+#endif
initialize_funnel_ops();
#ifdef HAVE_LIBPCAP
- capture_opts_init(&capture_opts, NULL /* cfile */);
+ capture_opts_init(&global_capture_opts, &cfile);
#endif
timestamp_set_type(TS_RELATIVE);
"-G" flag, as the "-G" flag dumps information registered by the
dissectors, and we must do it before we read the preferences, in
case any dissectors register preferences. */
- epan_init(register_all_protocols, register_all_protocol_handoffs,
- failure_message, open_failure_message, read_failure_message);
+ epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
+ failure_message, open_failure_message, read_failure_message,
+ write_failure_message);
/* Register all tap listeners; we do this before we parse the arguments,
as the "-z" argument can specify a registered tap. */
If none of our build or other processes uses "-G" with no arguments,
we can just process it with the other arguments. */
if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
+ proto_initialize_all_prefixes();
+
if (argc == 2)
proto_registrar_dump_fields(1);
else {
g_free(dp_path);
}
-#ifdef _WIN32
- /* Load Wpcap, if possible */
- load_wpcap();
-#endif
-
- init_cap_file(&cfile);
-
- /* Assemble the compile-time version information string */
- comp_info_str = g_string_new("Compiled ");
- get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
+ check_capture_privs();
- /* Assemble the run-time version information string */
- runtime_info_str = g_string_new("Running ");
- get_runtime_version_info(runtime_info_str, NULL);
+ cap_file_init(&cfile);
/* Print format defaults to this. */
print_format = PR_FMT_TEXT;
+ output_fields = output_fields_new();
+
/* Now get our args */
while ((opt = getopt(argc, argv, optstring)) != -1) {
switch (opt) {
case 'a': /* autostop criteria */
case 'b': /* Ringbuffer option */
- case 'c': /* Capture xxx packets */
+ case 'c': /* Capture x packets */
case 'f': /* capture filter */
- case 'i': /* Use interface xxx */
+ case 'i': /* Use interface x */
case 'p': /* Don't capture in promiscuous mode */
case 's': /* Set the snapshot (capture) length */
- case 'w': /* Write to capture file xxx */
+ case 'w': /* Write to capture file x */
case 'y': /* Set the pcap data link type */
#ifdef _WIN32
case 'B': /* Buffer size */
#endif /* _WIN32 */
#ifdef HAVE_LIBPCAP
- status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
+ status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
if(status != 0) {
exit(status);
}
arg_error = TRUE;
#endif
break;
+ case 'C':
+ /* Configuration profile settings were already processed just ignore them this time*/
+ break;
case 'd': /* Decode as rule */
if (!add_decode_as(optarg))
exit(1);
break;
+#if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
+ case 'K': /* Kerberos keytab file */
+ read_keytab_file(optarg);
+ break;
+#endif
case 'D': /* Print a list of capture devices and exit */
#ifdef HAVE_LIBPCAP
- status = capture_opts_list_interfaces();
+ status = capture_opts_list_interfaces(FALSE);
exit(status);
#else
capture_option_specified = TRUE;
arg_error = TRUE;
#endif
break;
+ case 'e':
+ /* Field entry */
+ output_fields_add(output_fields, optarg);
+ break;
+ case 'E':
+ /* Field option */
+ if(!output_fields_set_option(output_fields, optarg)) {
+ cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
+ output_fields_list_options(stderr);
+ exit(1);
+ }
+ break;
case 'F':
out_file_type = wtap_short_string_to_file_type(optarg);
if (out_file_type < 0) {
case 'L': /* Print list of link-layer types and exit */
#ifdef HAVE_LIBPCAP
list_link_layer_types = TRUE;
- break;
#else
capture_option_specified = TRUE;
arg_error = TRUE;
#endif
break;
+#if GLIB_CHECK_VERSION(2,10,0)
+ case 'P': /* Perform two pass analysis */
+ perform_two_pass_analysis = TRUE;
+ break;
+#endif
case 'n': /* No name resolution */
g_resolv_flags = RESOLV_NONE;
break;
g_resolv_flags = RESOLV_NONE;
badopt = string_to_name_resolve(optarg, &g_resolv_flags);
if (badopt != '\0') {
- cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
+ cmdarg_err("-N specifies unknown resolving option '%c';",
badopt);
+ cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
exit(1);
}
break;
case 'q': /* Quiet */
quiet = TRUE;
break;
- case 'r': /* Read capture file xxx */
+ case 'r': /* Read capture file x */
cf_name = g_strdup(optarg);
break;
case 'R': /* Read file filter */
timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
else if (strcmp(optarg, "d") == 0)
timestamp_set_type(TS_DELTA);
+ else if (strcmp(optarg, "dd") == 0)
+ timestamp_set_type(TS_DELTA_DIS);
else if (strcmp(optarg, "e") == 0)
timestamp_set_type(TS_EPOCH);
else {
} else if (strcmp(optarg, "psml") == 0) {
output_action = WRITE_XML;
verbose = FALSE;
+ } else if(strcmp(optarg, "fields") == 0) {
+ output_action = WRITE_FIELDS;
+ verbose = TRUE; /* Need full tree info */
} else {
cmdarg_err("Invalid -T parameter.");
- cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", or \"psml\".");
+ cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
exit(1);
}
break;
- case 'v': /* Show version and exit */
- printf("TShark " VERSION "%s\n"
- "\n"
- "%s"
- "\n"
- "%s"
- "\n"
- "%s",
- svnversion, get_copyright_info(), comp_info_str->str,
- runtime_info_str->str);
+ case 'v': /* Show version and exit */
+ {
+ GString *comp_info_str;
+ GString *runtime_info_str;
+ /* Assemble the compile-time version information string */
+ comp_info_str = g_string_new("Compiled ");
+ get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
+
+ /* Assemble the run-time version information string */
+ runtime_info_str = g_string_new("Running ");
+ get_runtime_version_info(runtime_info_str, NULL);
+ show_version(comp_info_str, runtime_info_str);
+ g_string_free(comp_info_str, TRUE);
+ g_string_free(runtime_info_str, TRUE);
exit(0);
break;
+ }
case 'V': /* Verbose */
verbose = TRUE;
break;
}
}
+ /* If we specified output fields, but not the output field type... */
+ if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
+ cmdarg_err("Output fields were specified with \"-e\", "
+ "but \"-Tfields\" was not specified.");
+ exit(1);
+ } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
+ cmdarg_err("\"-Tfields\" was specified, but no fields were "
+ "specified with \"-e\".");
+
+ exit(1);
+ }
+
/* If no capture filter or read filter has been specified, and there are
still command-line arguments, treat them as the tokens of a capture
filter (if no "-r" flag was specified) or a read filter (if a "-r"
rfilter = get_args_as_string(argc, argv, optind);
} else {
#ifdef HAVE_LIBPCAP
- if (capture_opts.has_cfilter) {
+ if (global_capture_opts.has_cfilter) {
cmdarg_err("Capture filters were specified both with \"-f\""
" and with additional command-line arguments");
exit(1);
}
- capture_opts.has_cfilter = TRUE;
- capture_opts.cfilter = get_args_as_string(argc, argv, optind);
+ global_capture_opts.has_cfilter = TRUE;
+ global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
#else
capture_option_specified = TRUE;
#endif
}
}
- if (!capture_opts.saving_to_file) {
+#ifdef HAVE_LIBPCAP
+ if (!global_capture_opts.saving_to_file) {
/* We're not saving the capture to a file; if "-q" wasn't specified,
we should print packet information */
if (!quiet)
output, reject the request. At best, we could redirect that
to the standard error; we *can't* write both to the standard
output and have either of them be useful. */
- if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
+ if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
cmdarg_err("You can't write both raw packet data and dissected packets"
" to the standard output.");
exit(1);
}
}
+#else
+ /* We're not saving the capture to a file; if "-q" wasn't specified,
+ we should print packet information */
+ if (!quiet)
+ print_packet_info = TRUE;
+#endif
#ifndef HAVE_LIBPCAP
if (capture_option_specified)
support in capture files we read). */
#ifdef HAVE_LIBPCAP
if (cf_name != NULL) {
- if (capture_opts.has_cfilter) {
+ if (global_capture_opts.has_cfilter) {
cmdarg_err("Only read filters, not capture filters, "
"can be specified when reading a capture file.");
exit(1);
exit(1);
}
/* No - did they specify a ring buffer option? */
- if (capture_opts.multi_files_on) {
+ if (global_capture_opts.multi_files_on) {
cmdarg_err("Ring buffer requested, but a capture isn't being done.");
exit(1);
}
} else {
- /* If they didn't specify a "-w" flag, but specified a maximum capture
- file size, tell them that this doesn't work, and exit. */
- if (capture_opts.has_autostop_filesize && capture_opts.save_file == NULL) {
- cmdarg_err("Maximum capture file size specified, but "
- "capture isn't being saved to a file.");
- exit(1);
- }
-
if (cf_name) {
/*
* "-r" was specified, so we're reading a capture file.
* Capture options don't apply here.
*/
- if (capture_opts.multi_files_on) {
+ if (global_capture_opts.multi_files_on) {
cmdarg_err("Multiple capture files requested, but "
"a capture isn't being done.");
exit(1);
}
- if (capture_opts.has_file_duration) {
+ if (global_capture_opts.has_file_duration) {
cmdarg_err("Switching capture files after a time interval was specified, but "
"a capture isn't being done.");
exit(1);
}
- if (capture_opts.has_ring_num_files) {
+ if (global_capture_opts.has_ring_num_files) {
cmdarg_err("A ring buffer of capture files was specified, but "
"a capture isn't being done.");
exit(1);
}
- if (capture_opts.has_autostop_files) {
+ if (global_capture_opts.has_autostop_files) {
cmdarg_err("A maximum number of capture files was specified, but "
"a capture isn't being done.");
exit(1);
}
- if (capture_opts.has_autostop_packets) {
- cmdarg_err("A maximum number of captured packets was specified, but "
- "a capture isn't being done.");
- exit(1);
- }
- if (capture_opts.has_autostop_filesize) {
- cmdarg_err("A maximum capture file size was specified, but "
- "a capture isn't being done.");
- exit(1);
- }
- if (capture_opts.has_autostop_duration) {
+
+ /* Note: TShark now allows the restriction of a _read_ file by packet count
+ * and byte count as well as a write file. Other autostop options remain valid
+ * only for a write file.
+ */
+ if (global_capture_opts.has_autostop_duration) {
cmdarg_err("A maximum capture time was specified, but "
"a capture isn't being done.");
exit(1);
/*
* "-r" wasn't specified, so we're doing a live capture.
*/
- if (capture_opts.saving_to_file) {
+ if (global_capture_opts.saving_to_file) {
/* They specified a "-w" flag, so we'll be saving to a capture file. */
/* When capturing, we only support writing libpcap format. */
cmdarg_err("Live captures can only be saved in libpcap format.");
exit(1);
}
- if (capture_opts.multi_files_on) {
- /* Multiple-file mode works only under certain conditions:
+ if (global_capture_opts.multi_files_on) {
+ /* Multiple-file mode doesn't work under certain conditions:
a) it doesn't work if you're writing to the standard output;
b) it doesn't work if you're writing to a pipe;
- c) it makes no sense if the maximum file size is set to "infinite"
- (XXX - shouldn't that be "if there is no stop criterion",
- as you might want to switch files based on a packet count
- or a time). */
- if (strcmp(capture_opts.save_file, "-") == 0) {
+ */
+ if (strcmp(global_capture_opts.save_file, "-") == 0) {
cmdarg_err("Multiple capture files requested, but "
"the capture is being written to the standard output.");
exit(1);
}
- if (capture_opts.output_to_pipe) {
+ if (global_capture_opts.output_to_pipe) {
cmdarg_err("Multiple capture files requested, but "
"the capture file is a pipe.");
exit(1);
}
- if (!capture_opts.has_autostop_filesize) {
+ if (!global_capture_opts.has_autostop_filesize &&
+ !global_capture_opts.has_file_duration) {
cmdarg_err("Multiple capture files requested, but "
- "no maximum capture file size was specified.");
+ "no maximum capture file size or duration was specified.");
exit(1);
}
}
/* They didn't specify a "-w" flag, so we won't be saving to a
capture file. Check for options that only make sense if
we're saving to a file. */
- if (capture_opts.has_autostop_filesize) {
+ if (global_capture_opts.has_autostop_filesize) {
cmdarg_err("Maximum capture file size specified, but "
"capture isn't being saved to a file.");
exit(1);
}
- if (capture_opts.multi_files_on) {
+ if (global_capture_opts.multi_files_on) {
cmdarg_err("Multiple capture files requested, but "
"the capture isn't being saved to a file.");
exit(1);
}
/* Build the column format array */
- col_setup(&cfile.cinfo, prefs->num_cols);
- for (i = 0; i < cfile.cinfo.num_cols; i++) {
- cfile.cinfo.col_fmt[i] = get_column_format(i);
- cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
- cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
- NUM_COL_FMTS);
- get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
- cfile.cinfo.col_data[i] = NULL;
- if (cfile.cinfo.col_fmt[i] == COL_INFO)
- cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
- else
- cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
- cfile.cinfo.col_fence[i] = 0;
- cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
- cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
- }
-
- for (i = 0; i < cfile.cinfo.num_cols; i++) {
- int j;
-
- for (j = 0; j < NUM_COL_FMTS; j++) {
- if (!cfile.cinfo.fmt_matx[i][j])
- continue;
-
- if (cfile.cinfo.col_first[j] == -1)
- cfile.cinfo.col_first[j] = i;
- cfile.cinfo.col_last[j] = i;
- }
- }
+ build_column_format_array(&cfile.cinfo, prefs->num_cols, TRUE);
#ifdef HAVE_LIBPCAP
- capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
- capture_opts_trim_ring_num_files(&capture_opts);
+ capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
+ capture_opts_trim_ring_num_files(&global_capture_opts);
#endif
if (rfilter != NULL) {
* can't open.
*/
relinquish_special_privs_perm();
+ print_current_user();
if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
epan_cleanup();
}
/* Process the packets in the file */
- err = load_cap_file(&cfile, capture_opts.save_file, out_file_type);
+#ifdef HAVE_LIBPCAP
+ err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
+ global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
+ global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
+#else
+ err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
+#endif
if (err != 0) {
epan_cleanup();
exit(2);
}
- cf_name[0] = '\0';
} else {
/* No capture file specified, so we're supposed to do a live capture
(or get a list of link-layer types for a live capture device);
#endif
/* trim the interface name and exit if that failed */
- if (!capture_opts_trim_iface(&capture_opts,
+ if (!capture_opts_trim_iface(&global_capture_opts,
(prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
exit(2);
}
/* if requested, list the link layer types and exit */
if (list_link_layer_types) {
- status = capture_opts_list_link_layer_types(&capture_opts);
+ status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
exit(status);
}
- if (!print_packet_info && !quiet) {
+ if (print_packet_info) {
+ if (!write_preamble(NULL)) {
+ err = errno;
+ show_print_file_io_error(err);
+ return err;
+ }
+ } else if (!quiet) {
/*
* We're not printing information for each packet, and the user
* didn't ask us not to print a count of packets as they arrive,
capture();
- if (capture_opts.multi_files_on) {
- ringbuf_free();
+ if (print_packet_info) {
+ if (!write_finale()) {
+ err = errno;
+ show_print_file_io_error(err);
+ }
}
#else
/* No - complain. */
#endif
}
+ g_free(cf_name);
+
+#if GLIB_CHECK_VERSION(2,10,0)
+ if (cfile.plist_start != NULL)
+ g_slice_free_chain(frame_data, cfile.plist_start, next);
+#endif
+
draw_tap_listeners(TRUE);
funnel_dump_all_text_windows();
epan_cleanup();
+ output_fields_free(output_fields);
+ output_fields = NULL;
+
return 0;
}
-#ifdef HAVE_LIBPCAP
-/* Do the low-level work of a capture.
- Returns TRUE if it succeeds, FALSE otherwise. */
+/*#define USE_BROKEN_G_MAIN_LOOP*/
-static condition *volatile cnd_file_duration = NULL; /* this must be visible in process_packet */
+#ifdef USE_BROKEN_G_MAIN_LOOP
+ GMainLoop *loop;
+#else
+ gboolean loop_running = FALSE;
+#endif
+ guint32 packet_count = 0;
-static int
-capture(void)
+
+/* XXX - move to the right position / file */
+/* read from a pipe (callback) */
+typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
+
+typedef struct pipe_input_tag {
+ gint source;
+ gpointer user_data;
+ int *child_process;
+ pipe_input_cb_t input_cb;
+ guint pipe_input_id;
+#ifdef _WIN32
+ GStaticMutex callback_running;
+#endif
+} pipe_input_t;
+
+static pipe_input_t pipe_input;
+
+#ifdef _WIN32
+/* The timer has expired, see if there's stuff to read from the pipe,
+ if so, do the callback */
+static gint
+pipe_timer_cb(gpointer data)
{
- int err = 0;
- int volatile volatile_err = 0;
- int volatile inpkts = 0;
- int pcap_cnt;
- condition *volatile cnd_autostop_size = NULL;
- condition *volatile cnd_autostop_duration = NULL;
- char *descr;
-#ifndef _WIN32
- void (*oldhandler)(int);
+ HANDLE handle;
+ DWORD avail = 0;
+ gboolean result, result1;
+ DWORD childstatus;
+ pipe_input_t *pipe_input = data;
+ gint iterations = 0;
+
+
+ g_static_mutex_lock (&pipe_input->callback_running);
+
+ /* try to read data from the pipe only 5 times, to avoid blocking */
+ while(iterations < 5) {
+ /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
+
+ /* Oddly enough although Named pipes don't work on win9x,
+ PeekNamedPipe does !!! */
+ handle = (HANDLE) _get_osfhandle (pipe_input->source);
+ result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
+
+ /* Get the child process exit status */
+ result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
+ &childstatus);
+
+ /* If the Peek returned an error, or there are bytes to be read
+ or the childwatcher thread has terminated then call the normal
+ callback */
+ if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
+
+ /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
+
+ /* And call the real handler */
+ if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
+ g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
+ /* pipe closed, return false so that the timer is stopped */
+ g_static_mutex_unlock (&pipe_input->callback_running);
+ return FALSE;
+ }
+ }
+ else {
+ /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
+ /* No data, stop now */
+ break;
+ }
+
+ iterations++;
+ }
+
+ /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
+
+ g_static_mutex_unlock (&pipe_input->callback_running);
+
+ /* we didn't stopped the timer, so let it run */
+ return TRUE;
+}
#endif
- struct pcap_stat stats;
- gboolean write_ok;
- gboolean close_ok;
- gboolean cfilter_error = FALSE;
- char errmsg[1024+1];
- char secondary_errmsg[4096+1];
- int save_file_fd;
- /* Initialize all data structures used for dissection. */
- init_dissection();
- ld.wtap_linktype = WTAP_ENCAP_UNKNOWN;
- ld.pdh = NULL;
- ld.packet_cb = capture_pcap_cb;
+void
+pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
+{
+
+ pipe_input.source = source;
+ pipe_input.child_process = child_process;
+ pipe_input.user_data = user_data;
+ pipe_input.input_cb = input_cb;
+
+#ifdef _WIN32
+ g_static_mutex_init(&pipe_input.callback_running);
+ /* Tricky to use pipes in win9x, as no concept of wait. NT can
+ do this but that doesn't cover all win32 platforms. GTK can do
+ this but doesn't seem to work over processes. Attempt to do
+ something similar here, start a timer and check for data on every
+ timeout. */
+ /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
+ pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
+#endif
+}
- /* open the "input file" from network interface or capture pipe */
- if (!capture_loop_open_input(&capture_opts, &ld, errmsg, sizeof(errmsg),
- secondary_errmsg, sizeof(secondary_errmsg))) {
- goto error;
- }
+#ifdef HAVE_LIBPCAP
+static int
+capture(void)
+{
+ gboolean ret;
+#ifdef USE_TSHARK_SELECT
+ fd_set readfds;
+#endif
+#ifndef _WIN32
+ struct sigaction action, oldaction;
+#endif
/*
+ * XXX - dropping privileges is still required, until code cleanup is done
+ *
+ * remove all dependencies to pcap specific code and using only dumpcap is almost done.
+ * when it's done, we don't need special privileges to run tshark at all,
+ * therefore we don't need to drop these privileges
+ * The only thing we might want to keep is a warning if tshark is run as root,
+ * as it's no longer necessary and potentially dangerous.
+ *
+ * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
* We've opened the capture device, so we shouldn't need any special
* privileges any more; relinquish those privileges.
*
* not special privileges.
*/
relinquish_special_privs_perm();
+ print_current_user();
- /* init the input filter from the network interface (capture pipe will do nothing) */
- switch (capture_loop_init_filter(ld.pcap_h, ld.from_cap_pipe, capture_opts.iface, capture_opts.cfilter)) {
-
- case INITFILTER_NO_ERROR:
- break;
-
- case INITFILTER_BAD_FILTER:
- cfilter_error = TRUE;
- g_snprintf(errmsg, sizeof(errmsg), "%s", pcap_geterr(ld.pcap_h));
- *secondary_errmsg = '\0';
- goto error;
-
- case INITFILTER_OTHER_ERROR:
- g_snprintf(errmsg, sizeof(errmsg), "Can't install filter (%s).",
- pcap_geterr(ld.pcap_h));
- g_snprintf(secondary_errmsg, sizeof(secondary_errmsg), "%s", please_report);
- goto error;
- }
-
- if (capture_opts.saving_to_file) {
- /* open the output file (temporary/specified name/ringbuffer/named pipe/stdout) */
- if (!capture_loop_open_output(&capture_opts, &save_file_fd, errmsg, sizeof(errmsg))) {
- *secondary_errmsg = '\0';
- goto error;
- }
-
- /* set up to write to the already-opened capture output file/files */
- if(!capture_loop_init_output(&capture_opts, save_file_fd, &ld, errmsg, sizeof errmsg)) {
- *secondary_errmsg = '\0';
- goto error;
- }
-
- /* Save the capture file name. */
- ld.save_file = capture_opts.save_file;
- }
-
- ld.wtap_linktype = wtap_pcap_encap_to_wtap_encap(ld.linktype);
+ /* Cleanup all data structures used for dissection. */
+ cleanup_dissection();
+ /* Initialize all data structures used for dissection. */
+ init_dissection();
#ifdef _WIN32
/* Catch a CTRL+C event and, if we get it, clean up and exit. */
SetConsoleCtrlHandler(capture_cleanup, TRUE);
#else /* _WIN32 */
/* Catch SIGINT and SIGTERM and, if we get either of them, clean up
- and exit.
- XXX - deal with signal semantics on various UNIX platforms. Or just
- use "sigaction()" and be done with it? */
- signal(SIGTERM, capture_cleanup);
- signal(SIGINT, capture_cleanup);
- if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
- signal(SIGHUP, oldhandler);
+ and exit. */
+ action.sa_handler = capture_cleanup;
+ action.sa_flags = 0;
+ sigemptyset(&action.sa_mask);
+ sigaction(SIGTERM, &action, NULL);
+ sigaction(SIGINT, &action, NULL);
+ sigaction(SIGHUP, NULL, &oldaction);
+ if (oldaction.sa_handler == SIG_DFL)
+ sigaction(SIGHUP, &action, NULL);
#ifdef SIGINFO
/* Catch SIGINFO and, if we get it and we're capturing to a file in
quiet mode, report the number of packets we've captured. */
- signal(SIGINFO, report_counts_siginfo);
+ action.sa_handler = report_counts_siginfo;
+ action.sa_flags = 0;
+ sigemptyset(&action.sa_mask);
+ sigaction(SIGINFO, &action, NULL);
#endif /* SIGINFO */
#endif /* _WIN32 */
- /* Let the user know what interface was chosen. */
- descr = get_interface_descriptive_name(capture_opts.iface);
- fprintf(stderr, "Capturing on %s\n", descr);
- g_free(descr);
-
- /* initialize capture stop conditions */
- init_capture_stop_conditions();
- /* create stop conditions */
- if (capture_opts.has_autostop_filesize)
- cnd_autostop_size = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
- (long)capture_opts.autostop_filesize * 1024);
- if (capture_opts.has_autostop_duration)
- cnd_autostop_duration = cnd_new((const char*)CND_CLASS_TIMEOUT,
- (gint32)capture_opts.autostop_duration);
-
- if (capture_opts.multi_files_on && capture_opts.has_file_duration)
- cnd_file_duration = cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
-
- if (!setjmp(ld.stopenv)) {
- ld.go = TRUE;
- ld.packet_count = 0;
- } else
- ld.go = FALSE;
-
- while (ld.go) {
- /* We need to be careful with automatic variables defined in the
- outer scope which are changed inside the loop. Most compilers
- don't try to roll them back to their original values after the
- longjmp which causes the loop to finish, but all that the
- standards say is that their values are indeterminate. If we
- don't want them to be rolled back, we should define them with the
- volatile attribute (paraphrasing W. Richard Stevens, Advanced
- Programming in the UNIX Environment, p. 178).
-
- The "err" variable causes a particular problem. If we give it
- the volatile attribute, then when we pass a reference to it (as
- in "&err") to a function, GCC warns: "passing arg <n> of
- <function> discards qualifiers from pointer target type".
- Therefore within the loop and just beyond we don't use "err".
- Within the loop we define "loop_err", and assign its value to
- "volatile_err", which is in the outer scope and is checked when
- the loop finishes.
-
- We also define "packet_count_prev" here to keep things tidy,
- since it's used only inside the loop. If it were defined in the
- outer scope, GCC would give a warning (unnecessary in this case)
- that it might be clobbered, and we'd need to give it the volatile
- attribute to suppress the warning. */
-
- int loop_err = 0;
- int packet_count_prev = 0;
-
- if (cnd_autostop_size == NULL && cnd_autostop_duration == NULL) {
- /* We're not stopping at a particular capture file size, and we're
- not stopping after some particular amount of time has expired,
- so either we have no stop condition or the only stop condition
- is a maximum packet count.
-
- If there's no maximum packet count, pass it -1, meaning "until
- you run out of packets in the bufferful you read". Otherwise,
- pass it the number of packets we have left to capture.
-
- We don't call "pcap_loop()" as, if we're saving to a file that's
- a FIFO, we want to flush the FIFO after we're done processing
- this libpcap bufferful of packets, so that the program
- reading the FIFO sees the packets immediately and doesn't get
- any partial packet, forcing it to block in the middle of reading
- that packet. */
- if (capture_opts.autostop_packets == 0)
- pcap_cnt = -1;
- else {
- if (ld.packet_count >= capture_opts.autostop_packets) {
- /* XXX do we need this test here? */
- /* It appears there's nothing more to capture. */
- break;
- }
- pcap_cnt = capture_opts.autostop_packets - ld.packet_count;
- }
- } else {
- /* We need to check the capture file size or the timeout after
- each packet. */
- pcap_cnt = 1;
- }
+ global_capture_opts.state = CAPTURE_PREPARING;
- inpkts = capture_loop_dispatch(NULL, &ld, errmsg, sizeof errmsg);
- if (inpkts < 0) {
- /* Error from "pcap_dispatch()", or error or "no more packets" from
- "cap_pipe_dispatch(). */
- ld.go = FALSE;
- } else if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
- /* The specified capture time has elapsed; stop the capture. */
- ld.go = FALSE;
- } else if (inpkts > 0) {
- if (capture_opts.autostop_packets != 0 &&
- ld.packet_count >= capture_opts.autostop_packets) {
- /* The specified number of packets have been captured and have
- passed both any capture filter in effect and any read filter
- in effect. */
- ld.go = FALSE;
- } else if (cnd_autostop_size != NULL &&
- cnd_eval(cnd_autostop_size, (guint32)ld.bytes_written)) {
- /* We're saving the capture to a file, and the capture file reached
- its maximum size. */
- if (capture_opts.multi_files_on) {
- /* Switch to the next ringbuffer file */
- if (ringbuf_switch_file(&ld.pdh, &capture_opts.save_file,
- &save_file_fd, &ld.bytes_written,
- &loop_err)) {
- /* File switch succeeded: reset the condition */
- cnd_reset(cnd_autostop_size);
- if (cnd_file_duration) {
- cnd_reset(cnd_file_duration);
- }
- } else {
- /* File switch failed: stop here */
- volatile_err = loop_err;
- ld.go = FALSE;
- }
- } else {
- /* No ringbuffer - just stop. */
- ld.go = FALSE;
- }
- }
- if (capture_opts.output_to_pipe) {
- if (ld.packet_count > packet_count_prev) {
- libpcap_dump_flush(ld.pdh, NULL);
- packet_count_prev = ld.packet_count;
- }
- }
- } /* inpkts > 0 */
- } /* while (ld.go) */
+ /* Let the user know what interface was chosen. */
+ global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
+ fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
- /* delete stop conditions */
- if (cnd_autostop_size != NULL)
- cnd_delete(cnd_autostop_size);
- if (cnd_autostop_duration != NULL)
- cnd_delete(cnd_autostop_duration);
- if (cnd_file_duration != NULL)
- cnd_delete(cnd_file_duration);
+ ret = sync_pipe_start(&global_capture_opts);
- if (print_packet_counts) {
- /* We're printing packet counts to stderr.
- Send a newline so that we move to the line after the packet count. */
- fprintf(stderr, "\n");
- }
+ if (!ret)
+ return FALSE;
- /* If we got an error while capturing, report it. */
- if (inpkts < 0) {
- if (ld.from_cap_pipe) {
- if (ld.cap_pipe_err == PIPERR) {
- cmdarg_err("Error while capturing packets: %s", errmsg);
- }
- } else {
- cmdarg_err("Error while capturing packets: %s", pcap_geterr(ld.pcap_h));
- }
- }
+ /* the actual capture loop
+ *
+ * XXX - glib doesn't seem to provide any event based loop handling.
+ *
+ * XXX - for whatever reason,
+ * calling g_main_loop_new() ends up in 100% cpu load.
+ *
+ * But that doesn't matter: in UNIX we can use select() to find an input
+ * source with something to do.
+ *
+ * But that doesn't matter because we're in a CLI (that doesn't need to
+ * update a GUI or something at the same time) so it's OK if we block
+ * trying to read from the pipe.
+ *
+ * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
+ * wrong (but I leave it there in case I am...).
+ */
- if (volatile_err == 0)
- write_ok = TRUE;
- else {
- show_capture_file_io_error(capture_opts.save_file, volatile_err, FALSE);
- write_ok = FALSE;
- }
+#ifdef USE_TSHARK_SELECT
+ FD_ZERO(&readfds);
+ FD_SET(pipe_input.source, &readfds);
+#endif
- if (capture_opts.save_file != NULL) {
- /* We're saving to a file or files; close all files. */
- close_ok = capture_loop_close_output(&capture_opts, &ld, &err);
+ loop_running = TRUE;
- /* If we've displayed a message about a write error, there's no point
- in displaying another message about an error on close. */
- if (!close_ok && write_ok)
- show_capture_file_io_error(capture_opts.save_file, err, TRUE);
- }
+ while (loop_running)
+ {
+#ifdef USE_TSHARK_SELECT
+ ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
- if (ld.from_cap_pipe && ld.cap_pipe_fd >= 0)
- eth_close(ld.cap_pipe_fd);
- else {
- /* Get the capture statistics, and, if any packets were dropped, report
- that. */
- if (pcap_stats(ld.pcap_h, &stats) >= 0) {
- if (stats.ps_drop != 0) {
- fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
+ if (ret == -1)
+ {
+ perror("select()");
+ return TRUE;
+ } else if (ret == 1) {
+#endif
+ /* Call the real handler */
+ if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
+ g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
+ return FALSE;
}
- } else {
- cmdarg_err("Can't get packet-drop statistics: %s", pcap_geterr(ld.pcap_h));
+#ifdef USE_TSHARK_SELECT
}
- pcap_close(ld.pcap_h);
+#endif
}
- /* Report the number of captured packets if not reported during capture
- and we are saving to a file. */
- report_counts();
-
return TRUE;
+}
-error:
- if (capture_opts.multi_files_on) {
- ringbuf_error_cleanup();
- }
- g_free(capture_opts.save_file);
- capture_opts.save_file = NULL;
- if (cfilter_error) {
+
+/* XXX - move the call to main_window_update() out of capture_sync.c */
+/* dummy for capture_sync.c to make linker happy */
+void main_window_update(void)
+{
+}
+
+/* capture child detected an error */
+void
+capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
+{
+ cmdarg_err("%s", error_msg);
+ cmdarg_err_cont("%s", secondary_error_msg);
+}
+
+
+/* capture child detected an capture filter related error */
+void
+capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
+{
dfilter_t *rfcode = NULL;
- if (dfilter_compile(capture_opts.cfilter, &rfcode) && rfcode != NULL) {
+
+
+ if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
cmdarg_err(
"Invalid capture filter: \"%s\"!\n"
"\n"
"so you can't use most display filter expressions as capture filters.\n"
"\n"
"See the User's Guide for a description of the capture filter syntax.",
- capture_opts.cfilter, errmsg);
+ capture_opts->cfilter, error_message);
dfilter_free(rfcode);
} else {
cmdarg_err(
"\n"
"That string isn't a valid capture filter (%s).\n"
"See the User's Guide for a description of the capture filter syntax.",
- capture_opts.cfilter, errmsg);
- }
- } else {
- cmdarg_err("%s", errmsg);
- if (*secondary_errmsg != '\0') {
- fprintf(stderr, "\n");
- cmdarg_err_cont("%s", secondary_errmsg);
+ capture_opts->cfilter, error_message);
}
- }
- if (ld.from_cap_pipe) {
- if (ld.cap_pipe_fd >= 0)
- eth_close(ld.cap_pipe_fd);
- } else {
- if (ld.pcap_h != NULL)
- pcap_close(ld.pcap_h);
- }
-
- return FALSE;
}
-static void
-capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
- const u_char *pd)
+
+/* capture child tells us we have a new (or the first) capture file */
+gboolean
+capture_input_new_file(capture_options *capture_opts, gchar *new_file)
{
- struct wtap_pkthdr whdr;
- union wtap_pseudo_header pseudo_header;
- const guchar *wtap_pd;
- loop_data *ld = (loop_data *) user;
- int loop_err;
- int err;
- int save_file_fd;
- gboolean packet_accepted;
+ gboolean is_tempfile;
+ int err;
-#ifdef SIGINFO
- /*
- * Prevent a SIGINFO handler from writing to stdout while we're
- * doing so; instead, have it just set a flag telling us to print
- * that information when we're done.
- */
- infodelay = TRUE;
-#endif /* SIGINFO */
- /* The current packet may have arrived after a very long silence,
- * way past the time to switch files. In order not to have
- * the first packet of a new series of events as the last
- * [or only] packet in the file, switch before writing!
- */
- if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
- /* time elapsed for this ring file, switch to the next */
- if (ringbuf_switch_file(&ld->pdh, &ld->save_file, &save_file_fd,
- &ld->bytes_written, &loop_err)) {
- /* File switch succeeded: reset the condition */
- cnd_reset(cnd_file_duration);
- } else {
- /* File switch failed: stop here */
- /* XXX - we should do something with "loop_err" */
- ld->go = FALSE;
- }
+ if(capture_opts->state == CAPTURE_PREPARING) {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
}
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
- if (do_dissection) {
- /* We're goint to print packet information, run a read filter, or
- process taps. Use process_packet() to handle that; in order
- to do that, we need to convert from libpcap to Wiretap format.
- If that fails, ignore the packet (wtap_process_pcap_packet has
- written an error message). */
- wtap_pd = wtap_process_pcap_packet(ld->wtap_linktype, phdr, pd,
- &pseudo_header, &whdr, &err);
- if (wtap_pd == NULL)
- return;
-
- packet_accepted = process_packet(&cfile, 0, &whdr, &pseudo_header, wtap_pd);
- } else {
- /* We're just writing out packets. */
- packet_accepted = TRUE;
- }
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
- if (packet_accepted) {
- /* Count this packet. */
-#ifdef HAVE_LIBPCAP
- ld->packet_count++;
-#endif
+ /* free the old filename */
+ if (capture_opts->save_file != NULL) {
- if (ld->pdh != NULL) {
- if (!libpcap_write_packet(ld->pdh, phdr, pd, &ld->bytes_written, &err)) {
- /* Error writing to a capture file */
- if (print_packet_counts) {
- /* We're printing counts of packets captured; move to the line after
- the count. */
- fprintf(stderr, "\n");
- }
- show_capture_file_io_error(ld->save_file, err, FALSE);
- pcap_close(ld->pcap_h);
- libpcap_dump_close(ld->pdh, &err);
- exit(2);
+ /* we start a new capture file, close the old one (if we had one before) */
+ if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
+ if ( ((capture_file *) capture_opts->cf)->wth != NULL) {
+ wtap_close(((capture_file *) capture_opts->cf)->wth);
+ }
+ ((capture_file *) capture_opts->cf)->state = FILE_CLOSED;
+ }
+
+ g_free(capture_opts->save_file);
+ is_tempfile = FALSE;
+ } else {
+ /* we didn't had a save_file before, must be a tempfile */
+ is_tempfile = TRUE;
+ }
+
+ /* save the new filename */
+ capture_opts->save_file = g_strdup(new_file);
+
+ /* if we are in real-time mode, open the new file now */
+ if(do_dissection) {
+ /* Attempt to open the capture file and set up to read from it. */
+ switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
+ case CF_OK:
+ break;
+ case CF_ERROR:
+ /* Don't unlink (delete) the save file - leave it around,
+ for debugging purposes. */
+ g_free(capture_opts->save_file);
+ capture_opts->save_file = NULL;
+ return FALSE;
+ }
+ }
+
+ capture_opts->state = CAPTURE_RUNNING;
+
+ return TRUE;
+}
+
+
+/* capture child tells us we have new packets to read */
+void
+capture_input_new_packets(capture_options *capture_opts, int to_read)
+{
+ gboolean ret;
+ int err;
+ gchar *err_info;
+ gint64 data_offset;
+ capture_file *cf = capture_opts->cf;
+ gboolean filtering_tap_listeners;
+ guint tap_flags;
+
+#ifdef SIGINFO
+ /*
+ * Prevent a SIGINFO handler from writing to stdout while we're
+ * doing so; instead, have it just set a flag telling us to print
+ * that information when we're done.
+ */
+ infodelay = TRUE;
+#endif /* SIGINFO */
+
+ /* Do we have any tap listeners with filters? */
+ filtering_tap_listeners = have_filtering_tap_listeners();
+
+ /* Get the union of the flags for all tap listeners. */
+ tap_flags = union_of_tap_listener_flags();
+
+ if(do_dissection) {
+ while (to_read-- && cf->wth) {
+ ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
+ if(ret == FALSE) {
+ /* read from file failed, tell the capture child to stop */
+ sync_pipe_stop(capture_opts);
+ wtap_close(cf->wth);
+ cf->wth = NULL;
+ } else {
+ ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
+ wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
+ filtering_tap_listeners, tap_flags);
+ }
+ if (ret != FALSE) {
+ /* packet sucessfully read and gone through the "Read Filter" */
+ packet_count++;
}
}
- if (print_packet_counts) {
+ } else {
+ /*
+ * Dumpcap's doing all the work; we're not doing any dissection.
+ * Count all the packets it wrote.
+ */
+ packet_count += to_read;
+ }
+
+ if (print_packet_counts) {
/* We're printing packet counts. */
- if (ld->packet_count != 0) {
- fprintf(stderr, "\r%u ", ld->packet_count);
+ if (packet_count != 0) {
+ fprintf(stderr, "\r%u ", packet_count);
/* stderr could be line buffered */
fflush(stderr);
}
- }
}
#ifdef SIGINFO
#endif /* SIGINFO */
}
+static void
+report_counts(void)
+{
+ if (!print_packet_counts) {
+ /* Report the count only if we aren't printing a packet count
+ as packets arrive. */
+ fprintf(stderr, "%u packet%s captured\n", packet_count,
+ plurality(packet_count, "", "s"));
+ }
+#ifdef SIGINFO
+ infoprint = FALSE; /* we just reported it */
+#endif /* SIGINFO */
+}
+
+#ifdef SIGINFO
+static void
+report_counts_siginfo(int signum _U_)
+{
+ int sav_errno = errno;
+ /* If we've been told to delay printing, just set a flag asking
+ that we print counts (if we're supposed to), otherwise print
+ the count of packets captured (if we're supposed to). */
+ if (infodelay)
+ infoprint = TRUE;
+ else
+ report_counts();
+ errno = sav_errno;
+}
+#endif /* SIGINFO */
+
+
+/* capture child detected any packet drops? */
+void
+capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
+{
+ if (print_packet_counts) {
+ /* We're printing packet counts to stderr.
+ Send a newline so that we move to the line after the packet count. */
+ fprintf(stderr, "\n");
+ }
+
+ if (dropped != 0) {
+ /* We're printing packet counts to stderr.
+ Send a newline so that we move to the line after the packet count. */
+ fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
+ }
+}
+
+
+/* capture child closed its side of the pipe, do the required cleanup */
+void
+capture_input_closed(capture_options *capture_opts)
+{
+ report_counts();
+
+ if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
+ wtap_close(((capture_file *) capture_opts->cf)->wth);
+ }
+#ifdef USE_BROKEN_G_MAIN_LOOP
+ /*g_main_loop_quit(loop);*/
+ g_main_quit(loop);
+#else
+ loop_running = FALSE;
+#endif
+}
+
+
+
+
#ifdef _WIN32
static BOOL WINAPI
capture_cleanup(DWORD ctrltype _U_)
C++ (i.e., it's a property of the Cygwin console window or Bash;
it happens if TShark is not built with Cygwin - for all I know,
building it with Cygwin may make the problem go away). */
- ld.go = FALSE;
+
+ /* tell the capture child to stop */
+ sync_pipe_stop(&global_capture_opts);
+
+ /* don't stop our own loop already here, otherwise status messages and
+ * cleanup wouldn't be done properly. The child will indicate the stop of
+ * everything by calling capture_input_closed() later */
+
return TRUE;
}
#else
static void
capture_cleanup(int signum _U_)
{
- /* Longjmp back to the starting point; "pcap_dispatch()", on many
- UNIX platforms, just keeps looping if it gets EINTR, so if we set
- "ld.go" to FALSE and return, we won't break out of it and quit
- capturing. */
- longjmp(ld.stopenv, 1);
+ /* tell the capture child to stop */
+ sync_pipe_stop(&global_capture_opts);
}
#endif /* _WIN32 */
+#endif /* HAVE_LIBPCAP */
-static void
-report_counts(void)
+#if GLIB_CHECK_VERSION(2,10,0)
+static gboolean
+process_packet_first_pass(capture_file *cf,
+ gint64 offset, const struct wtap_pkthdr *whdr,
+ union wtap_pseudo_header *pseudo_header, const guchar *pd)
{
-#ifdef SIGINFO
- /* XXX - if we use sigaction, this doesn't have to be done.
- (Yes, this isn't necessary on BSD, but just in case a system
- where "signal()" has AT&T semantics adopts SIGINFO....) */
- signal(SIGINFO, report_counts_siginfo);
-#endif /* SIGINFO */
+ frame_data *fdata = g_slice_new(frame_data);
+ epan_dissect_t edt;
+ gboolean passed;
- if (!print_packet_counts) {
- /* Report the count only if we aren't printing a packet count
- as packets arrive. */
- fprintf(stderr, "%u packets captured\n", ld.packet_count);
+ /* Count this packet. */
+ cf->count++;
+
+ /* If we're not running a display filter and we're not printing any
+ packet information, we don't need to do a dissection. This means
+ that all packets can be marked as 'passed'. */
+ passed = TRUE;
+
+ frame_data_init(fdata, cf->count, whdr, offset, cum_bytes);
+
+ /* If we're going to print packet information, or we're going to
+ run a read filter, or we're going to process taps, set up to
+ do a dissection and do so. */
+ if (do_dissection) {
+ if (g_resolv_flags)
+ /* Grab any resolved addresses */
+ host_name_lookup_process(NULL);
+
+ /* The protocol tree will be "visible", i.e., printed, only if we're
+ printing packet details, which is true if we're printing stuff
+ ("print_packet_info" is true) and we're in verbose mode ("verbose"
+ is true). */
+ epan_dissect_init(&edt, FALSE, FALSE);
+
+ /* If we're running a read filter, prime the epan_dissect_t with that
+ filter. */
+ if (cf->rfcode)
+ epan_dissect_prime_dfilter(&edt, cf->rfcode);
+
+ frame_data_set_before_dissect(fdata, &cf->elapsed_time,
+ &first_ts, &prev_dis_ts, &prev_cap_ts);
+
+ epan_dissect_run(&edt, pseudo_header, pd, fdata, NULL);
+
+ /* Run the read filter if we have one. */
+ if (cf->rfcode)
+ passed = dfilter_apply_edt(cf->rfcode, &edt);
}
-#ifdef SIGINFO
- infoprint = FALSE; /* we just reported it */
-#endif /* SIGINFO */
+
+ if (passed) {
+ frame_data_set_after_dissect(fdata, &cum_bytes, &prev_dis_ts);
+ cap_file_add_fdata(cf, fdata);
+ }
+ else
+ g_slice_free(frame_data, fdata);
+
+ if (do_dissection)
+ epan_dissect_cleanup(&edt);
+
+ return passed;
}
-#ifdef SIGINFO
-static void
-report_counts_siginfo(int signum _U_)
+static gboolean
+process_packet_second_pass(capture_file *cf, frame_data *fdata,
+ union wtap_pseudo_header *pseudo_header, const guchar *pd,
+ gboolean filtering_tap_listeners, guint tap_flags)
{
- int sav_errno = errno;
- /* If we've been told to delay printing, just set a flag asking
- that we print counts (if we're supposed to), otherwise print
- the count of packets captured (if we're supposed to). */
- if (infodelay)
- infoprint = TRUE;
- else
- report_counts();
- errno = sav_errno;
+ gboolean create_proto_tree;
+ column_info *cinfo;
+ epan_dissect_t edt;
+ gboolean passed;
+
+ /* If we're not running a display filter and we're not printing any
+ packet information, we don't need to do a dissection. This means
+ that all packets can be marked as 'passed'. */
+ passed = TRUE;
+
+ /* If we're going to print packet information, or we're going to
+ run a read filter, or we're going to process taps, set up to
+ do a dissection and do so. */
+ if (do_dissection) {
+ if (g_resolv_flags)
+ /* Grab any resolved addresses */
+ host_name_lookup_process(NULL);
+
+ if (cf->rfcode || verbose || filtering_tap_listeners ||
+ (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
+ create_proto_tree = TRUE;
+ else
+ create_proto_tree = FALSE;
+
+ /* The protocol tree will be "visible", i.e., printed, only if we're
+ printing packet details, which is true if we're printing stuff
+ ("print_packet_info" is true) and we're in verbose mode ("verbose"
+ is true). */
+ epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
+
+ /* If we're running a read filter, prime the epan_dissect_t with that
+ filter. */
+ if (cf->rfcode)
+ epan_dissect_prime_dfilter(&edt, cf->rfcode);
+
+ col_custom_prime_edt(&edt, &cf->cinfo);
+
+ tap_queue_init(&edt);
+
+ /* We only need the columns if either
+
+ 1) some tap needs the columns
+
+ or
+
+ 2) we're printing packet info but we're *not* verbose; in verbose
+ mode, we print the protocol tree, not the protocol summary. */
+ if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
+ cinfo = &cf->cinfo;
+ else
+ cinfo = NULL;
+
+ epan_dissect_run(&edt, pseudo_header, pd, fdata, cinfo);
+
+ tap_push_tapped_queue(&edt);
+
+ /* Run the read filter if we have one. */
+ if (cf->rfcode)
+ passed = dfilter_apply_edt(cf->rfcode, &edt);
+ }
+
+ if (passed) {
+ /* Process this packet. */
+ if (print_packet_info) {
+ /* We're printing packet information; print the information for
+ this packet. */
+ if (do_dissection)
+ print_packet(cf, &edt);
+ else
+ print_packet(cf, NULL);
+
+ /* The ANSI C standard does not appear to *require* that a line-buffered
+ stream be flushed to the host environment whenever a newline is
+ written, it just says that, on such a stream, characters "are
+ intended to be transmitted to or from the host environment as a
+ block when a new-line character is encountered".
+
+ The Visual C++ 6.0 C implementation doesn't do what is intended;
+ even if you set a stream to be line-buffered, it still doesn't
+ flush the buffer at the end of every line.
+
+ So, if the "-l" flag was specified, we flush the standard output
+ at the end of a packet. This will do the right thing if we're
+ printing packet summary lines, and, as we print the entire protocol
+ tree for a single packet without waiting for anything to happen,
+ it should be as good as line-buffered mode if we're printing
+ protocol trees. (The whole reason for the "-l" flag in either
+ tcpdump or TShark is to allow the output of a live capture to
+ be piped to a program or script and to have that script see the
+ information for the packet as soon as it's printed, rather than
+ having to wait until a standard I/O buffer fills up. */
+ if (line_buffered)
+ fflush(stdout);
+
+ if (ferror(stdout)) {
+ show_print_file_io_error(errno);
+ exit(2);
+ }
+ }
+ }
+
+ if (do_dissection) {
+ epan_dissect_cleanup(&edt);
+ }
+ return passed;
}
-#endif /* SIGINFO */
-#endif /* HAVE_LIBPCAP */
+#endif
static int
-load_cap_file(capture_file *cf, char *save_file, int out_file_type)
+load_cap_file(capture_file *cf, char *save_file, int out_file_type,
+ int max_packet_count, gint64 max_byte_count)
{
gint linktype;
int snapshot_length;
gchar *err_info;
gint64 data_offset;
char *save_file_string = NULL;
+ gboolean filtering_tap_listeners;
+ guint tap_flags;
linktype = wtap_file_encap(cf->wth);
if (save_file != NULL) {
}
pdh = NULL;
}
- while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
- if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
- wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
- /* Either there's no read filtering or this packet passed the
- filter, so, if we're writing to a capture file, write
- this packet out. */
- if (pdh != NULL) {
- if (!wtap_dump(pdh, wtap_phdr(cf->wth),
- wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
- &err)) {
- /* Error writing to a capture file */
- show_capture_file_io_error(save_file, err, FALSE);
- wtap_dump_close(pdh, &err);
- exit(2);
+
+ /* Do we have any tap listeners with filters? */
+ filtering_tap_listeners = have_filtering_tap_listeners();
+
+ /* Get the union of the flags for all tap listeners. */
+ tap_flags = union_of_tap_listener_flags();
+
+ if (perform_two_pass_analysis) {
+#if GLIB_CHECK_VERSION(2,10,0)
+ frame_data *fdata;
+ int old_max_packet_count = max_packet_count;
+
+ while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
+ if (process_packet_first_pass(cf, data_offset, wtap_phdr(cf->wth),
+ wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
+ /* Stop reading if we have the maximum number of packets;
+ * When the -c option has not been used, max_packet_count
+ * starts at 0, which practically means, never stop reading.
+ * (unless we roll over max_packet_count ?)
+ */
+ if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
+ err = 0; /* This is not an error */
+ break;
+ }
+ }
+ }
+
+ /* Close the sequential I/O side, to free up memory it requires. */
+ wtap_sequential_close(cf->wth);
+
+ /* Allow the protocol dissectors to free up memory that they
+ * don't need after the sequential run-through of the packets. */
+ postseq_cleanup_all_protocols();
+
+ max_packet_count = old_max_packet_count;
+
+ for (fdata = cf->plist_start; err == 0 && fdata != NULL; fdata = fdata->next) {
+ if (wtap_seek_read(cf->wth, fdata->file_off, &cf->pseudo_header,
+ cf->pd, fdata->cap_len, &err, &err_info)) {
+ if (process_packet_second_pass(cf, fdata,
+ &cf->pseudo_header, cf->pd,
+ filtering_tap_listeners, tap_flags)) {
+ /* Either there's no read filtering or this packet passed the
+ filter, so, if we're writing to a capture file, write
+ this packet out. */
+ if (pdh != NULL) {
+ if (!wtap_dump(pdh, wtap_phdr(cf->wth),
+ wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
+ &err)) {
+ /* Error writing to a capture file */
+ show_capture_file_io_error(save_file, err, FALSE);
+ wtap_dump_close(pdh, &err);
+ exit(2);
+ }
+ }
+ /* Stop reading if we have the maximum number of packets;
+ * When the -c option has not been used, max_packet_count
+ * starts at 0, which practically means, never stop reading.
+ * (unless we roll over max_packet_count ?)
+ */
+ if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
+ err = 0; /* This is not an error */
+ break;
+ }
}
}
}
+#endif
}
+ else {
+ while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
+ if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
+ wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
+ filtering_tap_listeners, tap_flags)) {
+ /* Either there's no read filtering or this packet passed the
+ filter, so, if we're writing to a capture file, write
+ this packet out. */
+ if (pdh != NULL) {
+ if (!wtap_dump(pdh, wtap_phdr(cf->wth),
+ wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
+ &err)) {
+ /* Error writing to a capture file */
+ show_capture_file_io_error(save_file, err, FALSE);
+ wtap_dump_close(pdh, &err);
+ exit(2);
+ }
+ }
+ /* Stop reading if we have the maximum number of packets;
+ * When the -c option has not been used, max_packet_count
+ * starts at 0, which practically means, never stop reading.
+ * (unless we roll over max_packet_count ?)
+ */
+ if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
+ err = 0; /* This is not an error */
+ break;
+ }
+ }
+ }
+ }
+
if (err != 0) {
/* Print a message noting that the read failed somewhere along the line. */
switch (err) {
case WTAP_ERR_UNSUPPORTED_ENCAP:
cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
cf->filename, err_info);
+ g_free(err_info);
break;
case WTAP_ERR_CANT_READ:
case WTAP_ERR_BAD_RECORD:
cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
cf->filename, err_info);
+ g_free(err_info);
break;
default:
wtap_close(cf->wth);
cf->wth = NULL;
- if (save_file_string != NULL)
- g_free(save_file_string);
+ g_free(save_file_string);
return err;
}
-static void
-fill_in_fdata(frame_data *fdata, capture_file *cf,
- const struct wtap_pkthdr *phdr, gint64 offset)
-{
- fdata->next = NULL;
- fdata->prev = NULL;
- fdata->pfd = NULL;
- fdata->num = cf->count;
- fdata->pkt_len = phdr->len;
- cum_bytes += phdr->len;
- fdata->cum_bytes = cum_bytes;
- fdata->cap_len = phdr->caplen;
- fdata->file_off = offset;
- fdata->lnk_t = phdr->pkt_encap;
- fdata->abs_ts = *((nstime_t *) &phdr->ts);
- fdata->flags.passed_dfilter = 0;
- fdata->flags.encoding = CHAR_ASCII;
- fdata->flags.visited = 0;
- fdata->flags.marked = 0;
- fdata->flags.ref_time = 0;
- fdata->color_filter = NULL;
-
- /* If we don't have the time stamp of the first packet in the
- capture, it's because this is the first packet. Save the time
- stamp of this packet as the time stamp of the first packet. */
- if (nstime_is_zero(&first_ts)) {
- first_ts = fdata->abs_ts;
- }
-
- /* If we don't have the time stamp of the previous displayed packet,
- it's because this is the first displayed packet. Save the time
- stamp of this packet as the time stamp of the previous displayed
- packet. */
- if (nstime_is_zero(&prev_ts)) {
- prev_ts = fdata->abs_ts;
- }
-
- /* Get the time elapsed between the first packet and this packet. */
- nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
-
- /* If it's greater than the current elapsed time, set the elapsed time
- to it (we check for "greater than" so as not to be confused by
- time moving backwards). */
- if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
- || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
- cf->elapsed_time = fdata->rel_ts;
- }
-
- /* Get the time elapsed between the previous displayed packet and
- this packet. */
- nstime_delta(&fdata->del_ts, &fdata->abs_ts, &prev_ts);
- prev_ts = fdata->abs_ts;
-}
-
-/* Free up all data attached to a "frame_data" structure. */
-static void
-clear_fdata(frame_data *fdata)
-{
- if (fdata->pfd)
- g_slist_free(fdata->pfd);
-}
-
static gboolean
process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
- union wtap_pseudo_header *pseudo_header, const guchar *pd)
+ union wtap_pseudo_header *pseudo_header, const guchar *pd,
+ gboolean filtering_tap_listeners, guint tap_flags)
{
frame_data fdata;
gboolean create_proto_tree;
- epan_dissect_t *edt;
+ column_info *cinfo;
+ epan_dissect_t edt;
gboolean passed;
/* Count this packet. */
cf->count++;
+ /* If we're not running a display filter and we're not printing any
+ packet information, we don't need to do a dissection. This means
+ that all packets can be marked as 'passed'. */
+ passed = TRUE;
+
+ frame_data_init(&fdata, cf->count, whdr, offset, cum_bytes);
+
/* If we're going to print packet information, or we're going to
run a read filter, or we're going to process taps, set up to
do a dissection and do so. */
if (do_dissection) {
- fill_in_fdata(&fdata, cf, whdr, offset);
-
- if (print_packet_info) {
+ if (print_packet_info && g_resolv_flags)
/* Grab any resolved addresses */
+ host_name_lookup_process(NULL);
- if (g_resolv_flags) {
- host_name_lookup_process(NULL);
- }
- }
-
- passed = TRUE;
- if (cf->rfcode || verbose || num_tap_filters!=0)
+ if (cf->rfcode || verbose || filtering_tap_listeners ||
+ (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo))
create_proto_tree = TRUE;
else
create_proto_tree = FALSE;
+
/* The protocol tree will be "visible", i.e., printed, only if we're
printing packet details, which is true if we're printing stuff
("print_packet_info" is true) and we're in verbose mode ("verbose"
is true). */
- edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
+ epan_dissect_init(&edt, create_proto_tree, print_packet_info && verbose);
/* If we're running a read filter, prime the epan_dissect_t with that
filter. */
if (cf->rfcode)
- epan_dissect_prime_dfilter(edt, cf->rfcode);
+ epan_dissect_prime_dfilter(&edt, cf->rfcode);
- tap_queue_init(edt);
+ col_custom_prime_edt(&edt, &cf->cinfo);
- /* We only need the columns if we're printing packet info but we're
- *not* verbose; in verbose mode, we print the protocol tree, not
- the protocol summary. */
- epan_dissect_run(edt, pseudo_header, pd, &fdata,
- (print_packet_info && !verbose) ? &cf->cinfo : NULL);
+ tap_queue_init(&edt);
- tap_push_tapped_queue(edt);
+ /* We only need the columns if either
- /* Run the read filter if we have one. */
- if (cf->rfcode)
- passed = dfilter_apply_edt(cf->rfcode, edt);
- else
- passed = TRUE;
- } else {
- /* We're not running a display filter and we're not printing any
- packet information, so we don't need to do a dissection, and all
- packets are processed. */
- edt = NULL;
- passed = TRUE;
- }
+ 1) some tap needs the columns
- if (passed) {
- /* Process this packet. */
- if (print_packet_info) {
- /* We're printing packet information; print the information for
- this packet. */
- print_packet(cf, edt);
+ or
- /* The ANSI C standard does not appear to *require* that a line-buffered
- stream be flushed to the host environment whenever a newline is
- written, it just says that, on such a stream, characters "are
- intended to be transmitted to or from the host environment as a
- block when a new-line character is encountered".
+ 2) we're printing packet info but we're *not* verbose; in verbose
+ mode, we print the protocol tree, not the protocol summary. */
+ if ((tap_flags & TL_REQUIRES_COLUMNS) || (print_packet_info && !verbose))
+ cinfo = &cf->cinfo;
+ else
+ cinfo = NULL;
- The Visual C++ 6.0 C implementation doesn't do what is intended;
- even if you set a stream to be line-buffered, it still doesn't
- flush the buffer at the end of every line.
+ frame_data_set_before_dissect(&fdata, &cf->elapsed_time,
+ &first_ts, &prev_dis_ts, &prev_cap_ts);
- So, if the "-l" flag was specified, we flush the standard output
- at the end of a packet. This will do the right thing if we're
- printing packet summary lines, and, as we print the entire protocol
- tree for a single packet without waiting for anything to happen,
- it should be as good as line-buffered mode if we're printing
- protocol trees. (The whole reason for the "-l" flag in either
- tcpdump or TShark is to allow the output of a live capture to
- be piped to a program or script and to have that script see the
- information for the packet as soon as it's printed, rather than
- having to wait until a standard I/O buffer fills up. */
- if (line_buffered)
- fflush(stdout);
+ epan_dissect_run(&edt, pseudo_header, pd, &fdata, cinfo);
- if (ferror(stdout)) {
- show_print_file_io_error(errno);
- exit(2);
- }
- }
- }
+ tap_push_tapped_queue(&edt);
- if (do_dissection) {
- epan_dissect_free(edt);
- clear_fdata(&fdata);
+ /* Run the read filter if we have one. */
+ if (cf->rfcode)
+ passed = dfilter_apply_edt(cf->rfcode, &edt);
}
- return passed;
-}
-
-static void
-show_capture_file_io_error(const char *fname, int err, gboolean is_close)
-{
- char *save_file_string;
-
- save_file_string = output_file_description(fname);
- switch (err) {
+ if (passed) {
+ frame_data_set_after_dissect(&fdata, &cum_bytes, &prev_dis_ts);
- case ENOSPC:
- cmdarg_err("Not all the packets could be written to the %s because there is "
- "no space left on the file system.",
- save_file_string);
- break;
+ /* Process this packet. */
+ if (print_packet_info) {
+ /* We're printing packet information; print the information for
+ this packet. */
+ if (do_dissection)
+ print_packet(cf, &edt);
+ else
+ print_packet(cf, NULL);
-#ifdef EDQUOT
- case EDQUOT:
- cmdarg_err("Not all the packets could be written to the %s because you are "
- "too close to, or over your disk quota.",
- save_file_string);
- break;
-#endif
+ /* The ANSI C standard does not appear to *require* that a line-buffered
+ stream be flushed to the host environment whenever a newline is
+ written, it just says that, on such a stream, characters "are
+ intended to be transmitted to or from the host environment as a
+ block when a new-line character is encountered".
- case WTAP_ERR_CANT_CLOSE:
- cmdarg_err("The %s couldn't be closed for some unknown reason.",
- save_file_string);
- break;
+ The Visual C++ 6.0 C implementation doesn't do what is intended;
+ even if you set a stream to be line-buffered, it still doesn't
+ flush the buffer at the end of every line.
- case WTAP_ERR_SHORT_WRITE:
- cmdarg_err("Not all the packets could be written to the %s.",
- save_file_string);
- break;
+ So, if the "-l" flag was specified, we flush the standard output
+ at the end of a packet. This will do the right thing if we're
+ printing packet summary lines, and, as we print the entire protocol
+ tree for a single packet without waiting for anything to happen,
+ it should be as good as line-buffered mode if we're printing
+ protocol trees. (The whole reason for the "-l" flag in either
+ tcpdump or TShark is to allow the output of a live capture to
+ be piped to a program or script and to have that script see the
+ information for the packet as soon as it's printed, rather than
+ having to wait until a standard I/O buffer fills up. */
+ if (line_buffered)
+ fflush(stdout);
- default:
- if (is_close) {
- cmdarg_err("The %s could not be closed: %s.", save_file_string,
- wtap_strerror(err));
- } else {
- cmdarg_err("An error occurred while writing to the %s: %s.",
- save_file_string, wtap_strerror(err));
+ if (ferror(stdout)) {
+ show_print_file_io_error(errno);
+ exit(2);
+ }
}
- break;
}
- g_free(save_file_string);
+
+ if (do_dissection) {
+ epan_dissect_cleanup(&edt);
+ frame_data_cleanup(&fdata);
+ }
+ return passed;
}
static gboolean
switch (output_action) {
case WRITE_TEXT:
- return print_preamble(print_stream, cf->filename);
- break;
+ return print_preamble(print_stream, cf ? cf->filename : NULL);
case WRITE_XML:
if (verbose)
write_psml_preamble(stdout);
return !ferror(stdout);
+ case WRITE_FIELDS:
+ write_fields_preamble(output_fields, stdout);
+ return !ferror(stdout);
+
default:
g_assert_not_reached();
return FALSE;
* the same time, sort of like an "Update list of packets
* in real time" capture in Wireshark.)
*/
- if (capture_opts.iface != NULL)
+ if (global_capture_opts.iface != NULL)
continue;
#endif
column_len = strlen(cf->cinfo.col_data[i]);
proto_tree_write_pdml(edt, stdout);
printf("\n");
return !ferror(stdout);
+ case WRITE_FIELDS:
+ proto_tree_write_fields(output_fields, edt, stdout);
+ printf("\n");
+ return !ferror(stdout);
}
} else {
/* Just fill in the columns. */
- epan_dissect_fill_in_columns(edt);
+ epan_dissect_fill_in_columns(edt, FALSE, TRUE);
/* Now print them. */
switch (output_action) {
case WRITE_XML:
proto_tree_write_psml(edt, stdout);
return !ferror(stdout);
+ case WRITE_FIELDS: /*No non-verbose "fields" format */
+ g_assert_not_reached();
+ break;
}
}
if (print_hex) {
case WRITE_TEXT:
return print_finale(print_stream);
- break;
case WRITE_XML:
if (verbose)
write_psml_finale(stdout);
return !ferror(stdout);
+ case WRITE_FIELDS:
+ write_fields_finale(output_fields, stdout);
+ return !ferror(stdout);
+
default:
g_assert_not_reached();
return FALSE;
}
}
+cf_status_t
+cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
+{
+ wtap *wth;
+ gchar *err_info;
+ char err_msg[2048+1];
+
+ wth = wtap_open_offline(fname, err, &err_info, perform_two_pass_analysis);
+ if (wth == NULL)
+ goto fail;
+
+ /* The open succeeded. Fill in the information for this file. */
+
+ /* Cleanup all data structures used for dissection. */
+ cleanup_dissection();
+ /* Initialize all data structures used for dissection. */
+ init_dissection();
+
+ cf->wth = wth;
+ cf->f_datalen = 0; /* not used, but set it anyway */
+
+ /* Set the file name because we need it to set the follow stream filter.
+ XXX - is that still true? We need it for other reasons, though,
+ in any case. */
+ cf->filename = g_strdup(fname);
+
+ /* Indicate whether it's a permanent or temporary file. */
+ cf->is_tempfile = is_tempfile;
+
+ /* If it's a temporary capture buffer file, mark it as not saved. */
+ cf->user_saved = !is_tempfile;
+
+ cf->cd_t = wtap_file_type(cf->wth);
+ cf->count = 0;
+ cf->drops_known = FALSE;
+ cf->drops = 0;
+ cf->snap = wtap_snapshot_length(cf->wth);
+ if (cf->snap == 0) {
+ /* Snapshot length not known. */
+ cf->has_snap = FALSE;
+ cf->snap = WTAP_MAX_PACKET_SIZE;
+ } else
+ cf->has_snap = TRUE;
+ nstime_set_zero(&cf->elapsed_time);
+ nstime_set_unset(&first_ts);
+ nstime_set_unset(&prev_dis_ts);
+ nstime_set_unset(&prev_cap_ts);
+
+ cf->state = FILE_READ_IN_PROGRESS;
+
+ return CF_OK;
+
+fail:
+ g_snprintf(err_msg, sizeof err_msg,
+ cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
+ cmdarg_err("%s", err_msg);
+ return CF_ERROR;
+}
+
+static void
+show_capture_file_io_error(const char *fname, int err, gboolean is_close)
+{
+ char *save_file_string;
+
+ save_file_string = output_file_description(fname);
+
+ switch (err) {
+
+ case ENOSPC:
+ cmdarg_err("Not all the packets could be written to the %s because there is "
+ "no space left on the file system.",
+ save_file_string);
+ break;
+
+#ifdef EDQUOT
+ case EDQUOT:
+ cmdarg_err("Not all the packets could be written to the %s because you are "
+ "too close to, or over your disk quota.",
+ save_file_string);
+ break;
+#endif
+
+ case WTAP_ERR_CANT_CLOSE:
+ cmdarg_err("The %s couldn't be closed for some unknown reason.",
+ save_file_string);
+ break;
+
+ case WTAP_ERR_SHORT_WRITE:
+ cmdarg_err("Not all the packets could be written to the %s.",
+ save_file_string);
+ break;
+
+ default:
+ if (is_close) {
+ cmdarg_err("The %s could not be closed: %s.", save_file_string,
+ wtap_strerror(err));
+ } else {
+ cmdarg_err("An error occurred while writing to the %s: %s.",
+ save_file_string, wtap_strerror(err));
+ }
+ break;
+ }
+ g_free(save_file_string);
+}
+
static void
show_print_file_io_error(int err)
{
fprintf(stderr, "\n");
}
-cf_status_t
-cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
-{
- wtap *wth;
- gchar *err_info;
- char err_msg[2048+1];
-
- wth = wtap_open_offline(fname, err, &err_info, FALSE);
- if (wth == NULL)
- goto fail;
-
- /* The open succeeded. Fill in the information for this file. */
-
- /* Initialize all data structures used for dissection. */
- init_dissection();
-
- cf->wth = wth;
- cf->f_datalen = 0; /* not used, but set it anyway */
-
- /* Set the file name because we need it to set the follow stream filter.
- XXX - is that still true? We need it for other reasons, though,
- in any case. */
- cf->filename = g_strdup(fname);
-
- /* Indicate whether it's a permanent or temporary file. */
- cf->is_tempfile = is_tempfile;
-
- /* If it's a temporary capture buffer file, mark it as not saved. */
- cf->user_saved = !is_tempfile;
-
- cf->cd_t = wtap_file_type(cf->wth);
- cf->count = 0;
- cf->drops_known = FALSE;
- cf->drops = 0;
- cf->snap = wtap_snapshot_length(cf->wth);
- if (cf->snap == 0) {
- /* Snapshot length not known. */
- cf->has_snap = FALSE;
- cf->snap = WTAP_MAX_PACKET_SIZE;
- } else
- cf->has_snap = TRUE;
- nstime_set_zero(&cf->elapsed_time);
- nstime_set_zero(&first_ts);
- nstime_set_zero(&prev_ts);
-
- return CF_OK;
-
-fail:
- g_snprintf(err_msg, sizeof err_msg,
- cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
- cmdarg_err("%s", err_msg);
- return CF_ERROR;
-}
-
/*
* General errors are reported with an console message in TShark.
filename, strerror(err));
}
+/*
+ * Write errors are reported with an console message in TShark.
+ */
+static void
+write_failure_message(const char *filename, int err)
+{
+ cmdarg_err("An error occurred while writing to the file \"%s\": %s.",
+ filename, strerror(err));
+}
+
/*
* Report an error in command-line arguments.
*/
va_list ap;
va_start(ap, fmt);
- fprintf(stderr, "tshark: ");
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, "\n");
+ failure_message(fmt, ap);
va_end(ap);
}
fprintf(stderr, "\n");
va_end(ap);
}
-
-
-/****************************************************************************************************************/
-/* indication report "dummies", needed for capture_loop.c */
-
-#ifdef HAVE_LIBPCAP
-
-/** Report a new capture file having been opened. */
-void
-report_new_capture_file(const char *filename)
-{
- /* shouldn't happen */
- g_assert_not_reached();
-}
-
-/** Report a number of new packets captured. */
-void
-report_packet_count(int packet_count)
-{
- /* shouldn't happen */
- g_assert_not_reached();
-}
-
-/** Report the packet drops once the capture finishes. */
-void
-report_packet_drops(int drops)
-{
- /* shouldn't happen */
- g_assert_not_reached();
-}
-
-/** Report an error in the capture. */
-void
-report_capture_error(const char *errmsg, const char *secondary_error_msg)
-{
- cmdarg_err(errmsg);
- cmdarg_err_cont(secondary_error_msg);
-}
-
-/** Report an error with a capture filter. */
-void
-report_cfilter_error(const char *cfilter, const char *errmsg)
-{
-
- cmdarg_err(
- "Invalid capture filter: \"%s\"!\n"
- "\n"
- "That string isn't a valid capture filter (%s).\n"
- "See the User's Guide for a description of the capture filter syntax.",
- cfilter, errmsg);
-}
-
-#endif /* HAVE_LIBPCAP */
-
-
-/****************************************************************************************************************/
-/* signal pipe "dummies", needed for capture_loop.c */
-
-#ifdef HAVE_LIBPCAP
-
-#ifdef _WIN32
-gboolean
-signal_pipe_check_running(void)
-{
- /* currently, no check required */
- return TRUE;
-}
-#endif /* _WIN32 */
-
-#endif /* HAVE_LIBPCAP */
git.samba.org / obnox / wireshark / wip.git / blobdiff