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tshark.c
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/* tshark.c
*
* Text-mode variant of Wireshark, along the lines of tcpdump and snoop,
* by Gilbert Ramirez <[email protected]> and Guy Harris <[email protected]>.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <[email protected]>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <config.h>
#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>
#include <limits.h>
#include <wsutil/ws_getopt.h>
#include <errno.h>
#ifdef _WIN32
# include <winsock2.h>
#endif
#ifndef _WIN32
#include <signal.h>
#endif
#include <glib.h>
#include <epan/exceptions.h>
#include <epan/epan.h>
#include <ui/clopts_common.h>
#include <ui/cmdarg_err.h>
#include <ui/exit_codes.h>
#include <ui/urls.h>
#include <wsutil/filesystem.h>
#include <wsutil/file_util.h>
#include <wsutil/socket.h>
#include <wsutil/privileges.h>
#include <wsutil/report_message.h>
#include <wsutil/please_report_bug.h>
#include <wsutil/wslog.h>
#include <wsutil/ws_assert.h>
#include <cli_main.h>
#include <ui/version_info.h>
#include <wiretap/wtap_opttypes.h>
#include "globals.h"
#include <epan/timestamp.h>
#include <epan/packet.h>
#ifdef HAVE_LUA
#include <epan/wslua/init_wslua.h>
#endif
#include "frame_tvbuff.h"
#include <epan/disabled_protos.h>
#include <epan/prefs.h>
#include <epan/column.h>
#include <epan/decode_as.h>
#include <epan/print.h>
#include <epan/addr_resolv.h>
#ifdef HAVE_LIBPCAP
#include "ui/capture_ui_utils.h"
#endif
#include "ui/taps.h"
#include "ui/util.h"
#include "ui/ws_ui_util.h"
#include "ui/decode_as_utils.h"
#include "ui/filter_files.h"
#include "ui/cli/tshark-tap.h"
#include "ui/cli/tap-exportobject.h"
#include "ui/tap_export_pdu.h"
#include "ui/dissect_opts.h"
#include "ui/ssl_key_export.h"
#include "ui/failure_message.h"
#if defined(HAVE_LIBSMI)
#include "epan/oids.h"
#endif
#include "epan/maxmind_db.h"
#include <epan/epan_dissect.h>
#include <epan/tap.h>
#include <epan/stat_tap_ui.h>
#include <epan/conversation_table.h>
#include <epan/srt_table.h>
#include <epan/rtd_table.h>
#include <epan/ex-opt.h>
#include <epan/exported_pdu.h>
#include <epan/secrets.h>
#include "capture_opts.h"
#include "capture/capture-pcap-util.h"
#ifdef HAVE_LIBPCAP
#include "capture/capture_ifinfo.h"
#ifdef _WIN32
#include "capture/capture-wpcap.h"
#endif /* _WIN32 */
#include <capture/capture_session.h>
#include <capture/capture_sync.h>
#include <ui/capture_info.h>
#endif /* HAVE_LIBPCAP */
#include <epan/funnel.h>
#include <wsutil/str_util.h>
#include <wsutil/utf8_entities.h>
#include <wsutil/json_dumper.h>
#include <wsutil/wslog.h>
#ifdef _WIN32
#include <wsutil/win32-utils.h>
#endif
#include "extcap.h"
#ifdef HAVE_PLUGINS
#include <wsutil/plugins.h>
#endif
/* Additional exit codes */
#define INVALID_EXPORT 2
#define INVALID_TAP 2
#define INVALID_CAPTURE 2
#define LONGOPT_EXPORT_OBJECTS LONGOPT_BASE_APPLICATION+1
#define LONGOPT_COLOR LONGOPT_BASE_APPLICATION+2
#define LONGOPT_NO_DUPLICATE_KEYS LONGOPT_BASE_APPLICATION+3
#define LONGOPT_ELASTIC_MAPPING_FILTER LONGOPT_BASE_APPLICATION+4
#define LONGOPT_EXPORT_TLS_SESSION_KEYS LONGOPT_BASE_APPLICATION+5
#define LONGOPT_CAPTURE_COMMENT LONGOPT_BASE_APPLICATION+6
capture_file cfile;
static guint32 cum_bytes;
static frame_data ref_frame;
static frame_data prev_dis_frame;
static frame_data prev_cap_frame;
static gboolean perform_two_pass_analysis;
static guint32 epan_auto_reset_count = 0;
static gboolean epan_auto_reset = FALSE;
/*
* The way the packet decode is to be written.
*/
typedef enum {
WRITE_NONE, /* dummy initial state */
WRITE_TEXT, /* summary or detail text */
WRITE_XML, /* PDML or PSML */
WRITE_FIELDS, /* User defined list of fields */
WRITE_JSON, /* JSON */
WRITE_JSON_RAW, /* JSON only raw hex */
WRITE_EK /* JSON bulk insert to Elasticsearch */
/* 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 print_packet_info; /* TRUE if we're to print packet information */
static gboolean print_summary; /* TRUE if we're to print packet summary information */
static gboolean print_details; /* TRUE if we're to print packet details information */
static gboolean print_hex; /* TRUE if we're to print hex/ascii information */
static gboolean line_buffered;
static gboolean quiet = FALSE;
static gboolean really_quiet = FALSE;
static gchar* delimiter_char = " ";
static gboolean dissect_color = FALSE;
static print_format_e print_format = PR_FMT_TEXT;
static print_stream_t *print_stream = NULL;
static char *output_file_name;
static output_fields_t* output_fields = NULL;
static gchar **protocolfilter = NULL;
static pf_flags protocolfilter_flags = PF_NONE;
static gboolean no_duplicate_keys = FALSE;
static proto_node_children_grouper_func node_children_grouper = proto_node_group_children_by_unique;
static json_dumper jdumper;
/* The line separator used between packets, changeable via the -S option */
static const char *separator = "";
/* Per-file comments to be added to the output file. */
static GPtrArray *capture_comments = NULL;
static gboolean prefs_loaded = FALSE;
#ifdef HAVE_LIBPCAP
/*
* TRUE if we're to print packet counts to keep track of captured packets.
*/
static gboolean print_packet_counts;
static capture_options global_capture_opts;
static capture_session global_capture_session;
static info_data_t global_info_data;
#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 */
static gboolean capture(void);
static gboolean capture_input_new_file(capture_session *cap_session,
gchar *new_file);
static void capture_input_new_packets(capture_session *cap_session,
int to_read);
static void capture_input_drops(capture_session *cap_session, guint32 dropped,
const char* interface_name);
static void capture_input_error(capture_session *cap_session,
char *error_msg, char *secondary_error_msg);
static void capture_input_cfilter_error(capture_session *cap_session,
guint i, const char *error_message);
static void capture_input_closed(capture_session *cap_session, gchar *msg);
static void report_counts(void);
#ifdef _WIN32
static BOOL WINAPI capture_cleanup(DWORD);
#else /* _WIN32 */
static void capture_cleanup(int);
#ifdef SIGINFO
static void report_counts_siginfo(int);
#endif /* SIGINFO */
#endif /* _WIN32 */
#endif /* HAVE_LIBPCAP */
static void reset_epan_mem(capture_file *cf, epan_dissect_t *edt, gboolean tree, gboolean visual);
typedef enum {
PROCESS_FILE_SUCCEEDED,
PROCESS_FILE_NO_FILE_PROCESSED,
PROCESS_FILE_ERROR,
PROCESS_FILE_INTERRUPTED
} process_file_status_t;
static process_file_status_t process_cap_file(capture_file *, char *, int, gboolean, int, gint64);
static gboolean process_packet_single_pass(capture_file *cf,
epan_dissect_t *edt, gint64 offset, wtap_rec *rec, Buffer *buf,
guint tap_flags);
static void show_print_file_io_error(void);
static gboolean write_preamble(capture_file *cf);
static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
static gboolean write_finale(void);
static void tshark_cmdarg_err(const char *msg_format, va_list ap);
static void tshark_cmdarg_err_cont(const char *msg_format, va_list ap);
static GHashTable *output_only_tables = NULL;
static void
list_capture_types(void) {
GArray *writable_type_subtypes;
fprintf(stderr, "tshark: The available capture file types for the \"-F\" flag are:\n");
writable_type_subtypes = wtap_get_writable_file_types_subtypes(FT_SORT_BY_NAME);
for (guint i = 0; i < writable_type_subtypes->len; i++) {
int ft = g_array_index(writable_type_subtypes, int, i);
fprintf(stderr, " %s - %s\n", wtap_file_type_subtype_name(ft),
wtap_file_type_subtype_description(ft));
}
g_array_free(writable_type_subtypes, TRUE);
}
struct string_elem {
const char *sstr; /* The short string */
const char *lstr; /* The long string */
};
static gint
string_compare(gconstpointer a, gconstpointer b)
{
return strcmp(((const struct string_elem *)a)->sstr,
((const struct string_elem *)b)->sstr);
}
static void
string_elem_print(gpointer data)
{
fprintf(stderr, " %s - %s\n",
((struct string_elem *)data)->sstr,
((struct string_elem *)data)->lstr);
}
static void
list_read_capture_types(void) {
guint i;
size_t num_file_types;
struct string_elem *captypes;
GSList *list = NULL;
const char *magic = "Magic-value-based";
const char *heuristic = "Heuristics-based";
/* How many readable file types are there? */
num_file_types = 0;
for (i = 0; open_routines[i].name != NULL; i++)
num_file_types++;
captypes = g_new(struct string_elem, num_file_types);
fprintf(stderr, "tshark: The available read file types for the \"-X read_format:\" option are:\n");
for (i = 0; i < num_file_types && open_routines[i].name != NULL; i++) {
captypes[i].sstr = open_routines[i].name;
captypes[i].lstr = (open_routines[i].type == OPEN_INFO_MAGIC) ? magic : heuristic;
list = g_slist_insert_sorted(list, &captypes[i], string_compare);
}
g_slist_free_full(list, string_elem_print);
g_free(captypes);
}
static void
list_export_pdu_taps(void) {
fprintf(stderr, "tshark: The available export tap names for the \"-U tap_name\" option are:\n");
for (GSList *export_pdu_tap_name_list = get_export_pdu_tap_list();
export_pdu_tap_name_list != NULL;
export_pdu_tap_name_list = g_slist_next(export_pdu_tap_name_list)) {
fprintf(stderr, " %s\n", (const char*)(export_pdu_tap_name_list->data));
}
}
static void
print_usage(FILE *output)
{
fprintf(output, "\n");
fprintf(output, "Usage: tshark [options] ...\n");
fprintf(output, "\n");
#ifdef HAVE_LIBPCAP
fprintf(output, "Capture interface:\n");
fprintf(output, " -i <interface>, --interface <interface>\n");
fprintf(output, " name or idx of interface (def: first non-loopback)\n");
fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
fprintf(output, " -s <snaplen>, --snapshot-length <snaplen>\n");
#ifdef HAVE_PCAP_CREATE
fprintf(output, " packet snapshot length (def: appropriate maximum)\n");
#else
fprintf(output, " packet snapshot length (def: %u)\n", WTAP_MAX_PACKET_SIZE_STANDARD);
#endif
fprintf(output, " -p, --no-promiscuous-mode\n");
fprintf(output, " don't capture in promiscuous mode\n");
#ifdef HAVE_PCAP_CREATE
fprintf(output, " -I, --monitor-mode capture in monitor mode, if available\n");
#endif
#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
fprintf(output, " -B <buffer size>, --buffer-size <buffer size>\n");
fprintf(output, " size of kernel buffer (def: %dMB)\n", DEFAULT_CAPTURE_BUFFER_SIZE);
#endif
fprintf(output, " -y <link type>, --linktype <link type>\n");
fprintf(output, " link layer type (def: first appropriate)\n");
fprintf(output, " --time-stamp-type <type> timestamp method for interface\n");
fprintf(output, " -D, --list-interfaces print list of interfaces and exit\n");
fprintf(output, " -L, --list-data-link-types\n");
fprintf(output, " print list of link-layer types of iface and exit\n");
fprintf(output, " --list-time-stamp-types print list of timestamp types for iface and exit\n");
fprintf(output, "\n");
fprintf(output, "Capture stop conditions:\n");
fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
fprintf(output, " -a <autostop cond.> ..., --autostop <autostop cond.> ...\n");
fprintf(output, " duration:NUM - stop after NUM seconds\n");
fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
fprintf(output, " files:NUM - stop after NUM files\n");
fprintf(output, " packets:NUM - stop after NUM packets\n");
/*fprintf(output, "\n");*/
fprintf(output, "Capture output:\n");
fprintf(output, " -b <ringbuffer opt.> ..., --ring-buffer <ringbuffer opt.>\n");
fprintf(output, " duration:NUM - switch to next file after NUM secs\n");
fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
fprintf(output, " packets:NUM - switch to next file after NUM packets\n");
fprintf(output, " interval:NUM - switch to next file when the time is\n");
fprintf(output, " an exact multiple of NUM secs\n");
#endif /* HAVE_LIBPCAP */
#ifdef HAVE_PCAP_REMOTE
fprintf(output, "RPCAP options:\n");
fprintf(output, " -A <user>:<password> use RPCAP password authentication\n");
#endif
/*fprintf(output, "\n");*/
fprintf(output, "Input file:\n");
fprintf(output, " -r <infile>, --read-file <infile>\n");
fprintf(output, " set the filename to read from (or '-' for stdin)\n");
fprintf(output, "\n");
fprintf(output, "Processing:\n");
fprintf(output, " -2 perform a two-pass analysis\n");
fprintf(output, " -M <packet count> perform session auto reset\n");
fprintf(output, " -R <read filter>, --read-filter <read filter>\n");
fprintf(output, " packet Read filter in Wireshark display filter syntax\n");
fprintf(output, " (requires -2)\n");
fprintf(output, " -Y <display filter>, --display-filter <display filter>\n");
fprintf(output, " packet displaY filter in Wireshark display filter\n");
fprintf(output, " syntax\n");
fprintf(output, " -n disable all name resolutions (def: \"mNd\" enabled, or\n");
fprintf(output, " as set in preferences)\n");
fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mnNtdv\"\n");
fprintf(output, " -d %s ...\n", DECODE_AS_ARG_TEMPLATE);
fprintf(output, " \"Decode As\", see the man page for details\n");
fprintf(output, " Example: tcp.port==8888,http\n");
fprintf(output, " -H <hosts file> read a list of entries from a hosts file, which will\n");
fprintf(output, " then be written to a capture file. (Implies -W n)\n");
fprintf(output, " --enable-protocol <proto_name>\n");
fprintf(output, " enable dissection of proto_name\n");
fprintf(output, " --disable-protocol <proto_name>\n");
fprintf(output, " disable dissection of proto_name\n");
fprintf(output, " --enable-heuristic <short_name>\n");
fprintf(output, " enable dissection of heuristic protocol\n");
fprintf(output, " --disable-heuristic <short_name>\n");
fprintf(output, " disable dissection of heuristic protocol\n");
/*fprintf(output, "\n");*/
fprintf(output, "Output:\n");
fprintf(output, " -w <outfile|-> write packets to a pcapng-format file named \"outfile\"\n");
fprintf(output, " (or '-' for stdout)\n");
fprintf(output, " --capture-comment <comment>\n");
fprintf(output, " add a capture file comment, if supported\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 pcapng\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, " -O <protocols> Only show packet details of these protocols, comma\n");
fprintf(output, " separated\n");
fprintf(output, " -P, --print print packet summary even when writing to a file\n");
fprintf(output, " -S <separator> the line separator to print between packets\n");
fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
fprintf(output, " -T pdml|ps|psml|json|jsonraw|ek|tabs|text|fields|?\n");
fprintf(output, " format of text output (def: text)\n");
fprintf(output, " -j <protocolfilter> protocols layers filter if -T ek|pdml|json selected\n");
fprintf(output, " (e.g. \"ip ip.flags text\", filter does not expand child\n");
fprintf(output, " nodes, unless child is specified also in the filter)\n");
fprintf(output, " -J <protocolfilter> top level protocol filter if -T ek|pdml|json selected\n");
fprintf(output, " (e.g. \"http tcp\", filter which expands all child nodes)\n");
fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port,\n");
fprintf(output, " _ws.col.Info)\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, " bom=y|n print a UTF-8 BOM\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, " occurrence=f|l|a print first, last or all occurrences of each field\n");
fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n");
fprintf(output, " aggregator\n");
fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
fprintf(output, " -t a|ad|adoy|d|dd|e|r|u|ud|udoy\n");
fprintf(output, " output format of time stamps (def: r: rel. to first)\n");
fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\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, " -Q only log true errors to stderr (quieter than -q)\n");
fprintf(output, " -g enable group read access on the output file(s)\n");
fprintf(output, " -W n Save extra information in the file, if supported.\n");
fprintf(output, " n = write network address resolution information\n");
fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
fprintf(output, " -U tap_name PDUs export mode, see the man page for details\n");
fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
fprintf(output, " --export-objects <protocol>,<destdir>\n");
fprintf(output, " save exported objects for a protocol to a directory\n");
fprintf(output, " named \"destdir\"\n");
fprintf(output, " --export-tls-session-keys <keyfile>\n");
fprintf(output, " export TLS Session Keys to a file named \"keyfile\"\n");
fprintf(output, " --color color output text similarly to the Wireshark GUI,\n");
fprintf(output, " requires a terminal with 24-bit color support\n");
fprintf(output, " Also supplies color attributes to pdml and psml formats\n");
fprintf(output, " (Note that attributes are nonstandard)\n");
fprintf(output, " --no-duplicate-keys If -T json is specified, merge duplicate keys in an object\n");
fprintf(output, " into a single key with as value a json array containing all\n");
fprintf(output, " values\n");
fprintf(output, " --elastic-mapping-filter <protocols> If -G elastic-mapping is specified, put only the\n");
fprintf(output, " specified protocols within the mapping file\n");
ws_log_print_usage(output);
fprintf(output, "\n");
fprintf(output, "Miscellaneous:\n");
fprintf(output, " -h, --help display this help and exit\n");
fprintf(output, " -v, --version 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");
fprintf(output, " -G [report] dump one of several available reports and exit\n");
fprintf(output, " default report=\"fields\"\n");
fprintf(output, " use \"-G help\" for more help\n");
#ifdef __linux__
fprintf(output, "\n");
fprintf(output, "Dumpcap can benefit from an enabled BPF JIT compiler if available.\n");
fprintf(output, "You might want to enable it by executing:\n");
fprintf(output, " \"echo 1 > /proc/sys/net/core/bpf_jit_enable\"\n");
fprintf(output, "Note that this can make your system less secure!\n");
#endif
}
static void
glossary_option_help(void)
{
FILE *output;
output = stdout;
fprintf(output, "%s\n", get_appname_and_version());
fprintf(output, "\n");
fprintf(output, "Usage: tshark -G [report]\n");
fprintf(output, "\n");
fprintf(output, "Glossary table reports:\n");
fprintf(output, " -G column-formats dump column format codes and exit\n");
fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n");
fprintf(output, " -G dissector-tables dump dissector table names, types, and properties\n");
fprintf(output, " -G elastic-mapping dump ElasticSearch mapping file\n");
fprintf(output, " -G fieldcount dump count of header fields and exit\n");
fprintf(output, " -G fields dump fields glossary and exit\n");
fprintf(output, " -G ftypes dump field type basic and descriptive names\n");
fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n");
fprintf(output, " -G plugins dump installed plugins and exit\n");
fprintf(output, " -G protocols dump protocols in registration database and exit\n");
fprintf(output, " -G values dump value, range, true/false strings and exit\n");
fprintf(output, "\n");
fprintf(output, "Preference reports:\n");
fprintf(output, " -G currentprefs dump current preferences and exit\n");
fprintf(output, " -G defaultprefs dump default preferences and exit\n");
fprintf(output, " -G folders dump about:folders\n");
fprintf(output, "\n");
}
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
get_tshark_compiled_version_info(GString *str)
{
/* Capture libraries */
get_compiled_caplibs_version(str);
}
static void
get_tshark_runtime_version_info(GString *str)
{
#ifdef HAVE_LIBPCAP
/* Capture libraries */
g_string_append(str, ", ");
get_runtime_caplibs_version(str);
#endif
/* stuff used by libwireshark */
epan_get_runtime_version_info(str);
}
static void
about_folders(void)
{
const char *constpath;
char *path;
gint i;
gchar **resultArray;
/* "file open" */
/*
* Fetching the "File" dialogs folder not implemented.
* This is arguably just a pwd for a ui/cli .
*/
/* temp */
printf("%-21s\t%s\n", "Temp:", g_get_tmp_dir());
/* pers conf */
path = get_persconffile_path("", FALSE);
printf("%-21s\t%s\n", "Personal configuration:", path);
g_free(path);
/* global conf */
constpath = get_datafile_dir();
if (constpath != NULL) {
printf("%-21s\t%s\n", "Global configuration:", constpath);
}
/* system */
constpath = get_systemfile_dir();
printf("%-21s\t%s\n", "System:", constpath);
/* program */
constpath = get_progfile_dir();
printf("%-21s\t%s\n", "Program:", constpath);
#ifdef HAVE_PLUGINS
/* pers plugins */
printf("%-21s\t%s\n", "Personal Plugins:", get_plugins_pers_dir_with_version());
/* global plugins */
printf("%-21s\t%s\n", "Global Plugins:", get_plugins_dir_with_version());
#endif
#ifdef HAVE_LUA
/* pers lua plugins */
printf("%-21s\t%s\n", "Personal Lua Plugins:", get_plugins_pers_dir());
/* global lua plugins */
printf("%-21s\t%s\n", "Global Lua Plugins:", get_plugins_dir());
#endif
/* Extcap */
constpath = get_extcap_dir();
resultArray = g_strsplit(constpath, G_SEARCHPATH_SEPARATOR_S, 10);
for(i = 0; resultArray[i]; i++)
printf("%-21s\t%s\n", "Extcap path:", g_strstrip(resultArray[i]));
g_strfreev(resultArray);
/* MaxMindDB */
path = maxmind_db_get_paths();
resultArray = g_strsplit(path, G_SEARCHPATH_SEPARATOR_S, 10);
for(i = 0; resultArray[i]; i++)
printf("%-21s\t%s\n", "MaxMind database path:", g_strstrip(resultArray[i]));
g_strfreev(resultArray);
g_free(path);
#ifdef HAVE_LIBSMI
/* SMI MIBs/PIBs */
path = oid_get_default_mib_path();
resultArray = g_strsplit(path, G_SEARCHPATH_SEPARATOR_S, 20);
for(i = 0; resultArray[i]; i++)
printf("%-21s\t%s\n", "MIB/PIB path:", g_strstrip(resultArray[i]));
g_strfreev(resultArray);
g_free(path);
#endif
}
static gboolean
must_do_dissection(dfilter_t *rfcode, dfilter_t *dfcode,
gchar *volatile pdu_export_arg)
{
/* We have to dissect each packet if:
we're printing information about each packet;
we're using a read filter on the packets;
we're using a display filter on the packets;
we're exporting PDUs;
we're using any taps that need dissection. */
return print_packet_info || rfcode || dfcode || pdu_export_arg ||
tap_listeners_require_dissection() || dissect_color;
}
int
main(int argc, char *argv[])
{
char *err_msg;
static const struct report_message_routines tshark_report_routines = {
failure_message,
failure_message,
open_failure_message,
read_failure_message,
write_failure_message,
cfile_open_failure_message,
cfile_dump_open_failure_message,
cfile_read_failure_message,
cfile_write_failure_message,
cfile_close_failure_message
};
int opt;
static const struct ws_option long_options[] = {
{"help", ws_no_argument, NULL, 'h'},
{"version", ws_no_argument, NULL, 'v'},
LONGOPT_CAPTURE_COMMON
LONGOPT_DISSECT_COMMON
{"print", ws_no_argument, NULL, 'P'},
{"export-objects", ws_required_argument, NULL, LONGOPT_EXPORT_OBJECTS},
{"export-tls-session-keys", ws_required_argument, NULL, LONGOPT_EXPORT_TLS_SESSION_KEYS},
{"color", ws_no_argument, NULL, LONGOPT_COLOR},
{"no-duplicate-keys", ws_no_argument, NULL, LONGOPT_NO_DUPLICATE_KEYS},
{"elastic-mapping-filter", ws_required_argument, NULL, LONGOPT_ELASTIC_MAPPING_FILTER},
{"capture-comment", ws_required_argument, NULL, LONGOPT_CAPTURE_COMMENT},
{0, 0, 0, 0 }
};
gboolean arg_error = FALSE;
gboolean has_extcap_options = FALSE;
int err;
gchar *err_info;
gboolean exp_pdu_status;
volatile process_file_status_t status;
volatile gboolean draw_taps = FALSE;
volatile int exit_status = EXIT_SUCCESS;
#ifdef HAVE_LIBPCAP
int caps_queries = 0;
GList *if_list;
gchar *err_str, *err_str_secondary;
struct bpf_program fcode;
#else
gboolean capture_option_specified = FALSE;
volatile int max_packet_count = 0;
#endif
volatile int out_file_type = WTAP_FILE_TYPE_SUBTYPE_UNKNOWN;
volatile gboolean out_file_name_res = FALSE;
volatile int in_file_type = WTAP_TYPE_AUTO;
gchar *volatile cf_name = NULL;
gchar *rfilter = NULL;
gchar *volatile dfilter = NULL;
dfilter_t *rfcode = NULL;
dfilter_t *dfcode = NULL;
e_prefs *prefs_p;
gchar *output_only = NULL;
gchar *volatile pdu_export_arg = NULL;
char *volatile exp_pdu_filename = NULL;
const gchar *volatile tls_session_keys_file = NULL;
exp_pdu_t exp_pdu_tap_data;
const gchar* elastic_mapping_filter = NULL;
/*
* The leading + ensures that getopt_long() does not permute the argv[]
* entries.
*
* We have to make sure that the first getopt_long() preserves the content
* of argv[] for the subsequent getopt_long() call.
*
* We use getopt_long() in both cases to ensure that we're using a routine
* whose permutation behavior we can control in the same fashion on all
* platforms, and so that, if we ever need to process a long argument before
* doing further initialization, we can do so.
*
* Glibc and Solaris libc document that a leading + disables permutation
* of options, regardless of whether POSIXLY_CORRECT is set or not; *BSD
* and macOS don't document it, but do so anyway.
*
* We do *not* use a leading - because the behavior of a leading - is
* platform-dependent.
*/
#define OPTSTRING "+2" OPTSTRING_CAPTURE_COMMON OPTSTRING_DISSECT_COMMON "M:C:e:E:F:gG:hH:j:J:lo:O:PqQr:R:S:T:U:vVw:W:xX:Y:z:"
static const char optstring[] = OPTSTRING;
/*
* Set the C-language locale to the native environment and set the
* code page to UTF-8 on Windows.
*/
#ifdef _WIN32
setlocale(LC_ALL, ".UTF-8");
#else
setlocale(LC_ALL, "");
#endif
cmdarg_err_init(tshark_cmdarg_err, tshark_cmdarg_err_cont);
/* Initialize log handler early so we can have proper logging during startup. */
ws_log_init("tshark", vcmdarg_err);
/* Early logging command-line initialization. */
ws_log_parse_args(&argc, argv, vcmdarg_err, INVALID_OPTION);
ws_debug("tshark started with %d args", argc);
#ifdef _WIN32
create_app_running_mutex();
#endif /* _WIN32 */
/*
* Get credential information for later use, and drop privileges
* before doing anything else.
* Let the user know if anything happened.
*/
init_process_policies();
relinquish_special_privs_perm();
print_current_user();
/*
* Attempt to get the pathname of the directory containing the
* executable file.
*/
err_msg = init_progfile_dir(argv[0]);
if (err_msg != NULL) {
fprintf(stderr,
"tshark: Can't get pathname of directory containing the tshark program: %s.\n"
"It won't be possible to capture traffic.\n"
"Report this to the Wireshark developers.",
err_msg);
g_free(err_msg);
}
initialize_funnel_ops();
#ifdef _WIN32
ws_init_dll_search_path();
#ifdef HAVE_LIBPCAP
/* Load wpcap if possible. Do this before collecting the run-time version information */
load_wpcap();
#endif /* HAVE_LIBPCAP */
#endif /* _WIN32 */
/* Initialize the version information. */
ws_init_version_info("TShark (Wireshark)", get_tshark_compiled_version_info,
epan_get_compiled_version_info,
get_tshark_runtime_version_info);
/* Fail sometimes. Useful for testing fuzz scripts. */
/* if (g_random_int_range(0, 100) < 5) abort(); */
/*
* In order to have the -X opts assigned before the wslua machine starts
* we need to call getopt_long before epan_init() gets called.
*
* In order to handle, for example, -o options, we also need to call it
* *after* epan_init() gets called, so that the dissectors have had a
* chance to register their preferences.
*
* Spawning a bunch of extcap processes can delay program startup,
* particularly on Windows. Check to see if we have any options that
* might require extcap and set has_extcap_options = TRUE if that's
* the case.
*
* XXX - can we do this all with one getopt_long() call, saving the
* arguments we can't handle until after initializing libwireshark,
* and then process them after initializing libwireshark?
*/
ws_opterr = 0;
while ((opt = ws_getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
switch (opt) {
case 'C': /* Configuration Profile */
if (profile_exists (ws_optarg, FALSE)) {
set_profile_name (ws_optarg);
} else {
cmdarg_err("Configuration Profile \"%s\" does not exist", ws_optarg);
exit_status = INVALID_OPTION;
goto clean_exit;
}
break;
case 'G':
if (g_str_has_suffix(ws_optarg, "prefs") || strcmp(ws_optarg, "folders") == 0) {
has_extcap_options = TRUE;
}
break;
case 'i':
has_extcap_options = TRUE;
break;
case 'o':
if (g_str_has_prefix(ws_optarg, "extcap.")) {
has_extcap_options = TRUE;
}
break;
case 'P': /* Print packet summary info even when writing to a file */
print_packet_info = TRUE;
print_summary = TRUE;
break;
case 'r': /* Read capture file x */
cf_name = g_strdup(ws_optarg);
break;
case 'O': /* Only output these protocols */
output_only = g_strdup(ws_optarg);
/* FALLTHROUGH */
case 'V': /* Verbose */
print_details = TRUE;
print_packet_info = TRUE;
break;
case 'x': /* Print packet data in hex (and ASCII) */
print_hex = TRUE;
/* The user asked for hex output, so let's ensure they get it,
* even if they're writing to a file.
*/
print_packet_info = TRUE;
break;
case 'X':
ex_opt_add(ws_optarg);
break;
case LONGOPT_ELASTIC_MAPPING_FILTER:
elastic_mapping_filter = ws_optarg;
break;
default:
break;
}
}
#ifndef HAVE_LUA
if (ex_opt_count("lua_script") > 0) {
cmdarg_err("This version of TShark was not built with support for Lua scripting.");
exit_status = INIT_FAILED;
goto clean_exit;
}
#endif /* HAVE_LUA */
init_report_message("TShark", &tshark_report_routines);
#ifdef HAVE_LIBPCAP
capture_opts_init(&global_capture_opts);
capture_session_init(&global_capture_session, &cfile,
capture_input_new_file, capture_input_new_packets,
capture_input_drops, capture_input_error,
capture_input_cfilter_error, capture_input_closed);
#endif
timestamp_set_type(TS_RELATIVE);
timestamp_set_precision(TS_PREC_AUTO);
timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
/*
* Libwiretap must be initialized before libwireshark is, so that
* dissection-time handlers for file-type-dependent blocks can
* register using the file type/subtype value for the file type.
*/
wtap_init(TRUE);
/* Register all dissectors; we must do this before checking for the
"-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. */
if (!epan_init(NULL, NULL, TRUE)) {
exit_status = INIT_FAILED;
goto clean_exit;
}
/* Register all tap listeners; we do this before we parse the arguments,
as the "-z" argument can specify a registered tap. */
register_all_tap_listeners(tap_reg_listener);
/*
* An empty cf_name indicates that we're capturing, and we might
* be doing so on an extcap interface.
*/
if (has_extcap_options || !cf_name) {
extcap_register_preferences();
}
conversation_table_set_gui_info(init_iousers);
hostlist_table_set_gui_info(init_hostlists);
srt_table_iterate_tables(register_srt_tables, NULL);
rtd_table_iterate_tables(register_rtd_tables, NULL);
stat_tap_iterate_tables(register_simple_stat_tables, NULL);
/* If invoked with the "-G" flag, we dump out information based on
the argument to the "-G" flag; if no argument is specified,
for backwards compatibility we dump out a glossary of display
filter symbols.
XXX - we do this here, for now, to support "-G" with no arguments.
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();
else {
if (strcmp(argv[2], "column-formats") == 0)
column_dump_column_formats();
else if (strcmp(argv[2], "currentprefs") == 0) {
epan_load_settings();
write_prefs(NULL);
}
else if (strcmp(argv[2], "decodes") == 0)
dissector_dump_decodes();
else if (strcmp(argv[2], "defaultprefs") == 0)
write_prefs(NULL);
else if (strcmp(argv[2], "dissector-tables") == 0)
dissector_dump_dissector_tables();
else if (strcmp(argv[2], "elastic-mapping") == 0)
proto_registrar_dump_elastic(elastic_mapping_filter);
else if (strcmp(argv[2], "fieldcount") == 0) {
/* return value for the test suite */
exit_status = proto_registrar_dump_fieldcount();
goto clean_exit;
} else if (strcmp(argv[2], "fields") == 0)
proto_registrar_dump_fields();
else if (strcmp(argv[2], "folders") == 0) {
epan_load_settings();
about_folders();
} else if (strcmp(argv[2], "ftypes") == 0)
proto_registrar_dump_ftypes();
else if (strcmp(argv[2], "heuristic-decodes") == 0)
dissector_dump_heur_decodes();
else if (strcmp(argv[2], "plugins") == 0) {