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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 <gram@alumni.rice.edu> and Guy Harris <guy@alum.mit.edu>.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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 <ws_exit_codes.h>
#include <wsutil/clopts_common.h>
#include <wsutil/cmdarg_err.h>
#include <ui/urls.h>
#include <wsutil/filesystem.h>
#include <wsutil/file_util.h>
#include <wsutil/time_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 <wsutil/strtoi.h>
#include <cli_main.h>
#include <wsutil/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>
#include <epan/enterprises.h>
#include <epan/manuf.h>
#include <epan/services.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 "wsutil/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/codecs.h>
#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
#define LONGOPT_HEXDUMP LONGOPT_BASE_APPLICATION+7
#define LONGOPT_SELECTED_FRAME LONGOPT_BASE_APPLICATION+8
#define LONGOPT_PRINT_TIMERS LONGOPT_BASE_APPLICATION+9
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;
static guint32 selected_frame_number = 0;
/*
* 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 guint hexdump_source_option = HEXDUMP_SOURCE_MULTI; /* Default - Enable legacy multi-source mode */
static guint hexdump_ascii_option = HEXDUMP_ASCII_INCLUDE; /* Default - Enable legacy undelimited ASCII dump */
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 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 bool 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, int);
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 gboolean opt_print_timers = FALSE;
struct elapsed_pass_s {
gint64 dissect;
gint64 dfilter_read;
gint64 dfilter_filter;
};
static struct {
gint64 dfilter_expand;
gint64 dfilter_compile;
struct elapsed_pass_s first_pass;
gint64 elapsed_first_pass;
struct elapsed_pass_s second_pass;
gint64 elapsed_second_pass;
}
tshark_elapsed;
static void
print_elapsed_json(const char *cf_name, const char *dfilter)
{
json_dumper dumper = {
.output_file = stderr,
.flags = JSON_DUMPER_FLAGS_PRETTY_PRINT,
};
if (tshark_elapsed.elapsed_first_pass == 0) {
// Should not happen
ws_warning("Print timers requested but no timing info provided");
return;
}
#define DUMP(name, val) \
json_dumper_set_member_name(&dumper, name); \
json_dumper_value_anyf(&dumper, "%"PRId64, val)
json_dumper_begin_object(&dumper);
json_dumper_set_member_name(&dumper, "version");
json_dumper_value_string(&dumper, get_ws_vcs_version_info_short());
if (cf_name) {
json_dumper_set_member_name(&dumper, "path");
json_dumper_value_string(&dumper, cf_name);
}
if (dfilter) {
json_dumper_set_member_name(&dumper, "filter");
json_dumper_value_string(&dumper, dfilter);
}
json_dumper_set_member_name(&dumper, "time_unit");
json_dumper_value_string(&dumper, "microseconds");
DUMP("elapsed", tshark_elapsed.elapsed_first_pass +
tshark_elapsed.elapsed_second_pass);
DUMP("dfilter_expand", tshark_elapsed.dfilter_expand);
DUMP("dfilter_compile", tshark_elapsed.dfilter_compile);
json_dumper_begin_array(&dumper);
json_dumper_begin_object(&dumper);
DUMP("elapsed", tshark_elapsed.elapsed_first_pass);
DUMP("dissect", tshark_elapsed.first_pass.dissect);
DUMP("display_filter", tshark_elapsed.first_pass.dfilter_filter);
DUMP("read_filter", tshark_elapsed.first_pass.dfilter_read);
json_dumper_end_object(&dumper);
if (tshark_elapsed.elapsed_second_pass) {
json_dumper_begin_object(&dumper);
DUMP("elapsed", tshark_elapsed.elapsed_second_pass);
DUMP("dissect", tshark_elapsed.second_pass.dissect);
DUMP("display_filter", tshark_elapsed.second_pass.dfilter_filter);
DUMP("read_filter", tshark_elapsed.second_pass.dfilter_read);
json_dumper_end_object(&dumper);
}
json_dumper_end_array(&dumper);
json_dumper_end_object(&dumper);
json_dumper_finish(&dumper);
}
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 and the encapsulation types they produce 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 - %s\n", (const char*)(export_pdu_tap_name_list->data), wtap_encap_description(export_pdu_tap_get_encap((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, " --update-interval interval between updates with new packets (def: %dms)\n", DEFAULT_UPDATE_INTERVAL);
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");
fprintf(output, " printname:FILE - print filename to FILE when written\n");
fprintf(output, " (can use 'stdout' or 'stderr')\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, " --only-protocols <protocols>\n");
fprintf(output, " Only enable dissection of these protocols, comma\n");
fprintf(output, " separated. Disable everything else\n");
fprintf(output, " --disable-all-protocols\n");
fprintf(output, " Disable dissection of all protocols\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, " --hexdump <hexoption> add hexdump, set options for data source and ASCII dump\n");
fprintf(output, " all dump all data sources (-x default)\n");
fprintf(output, " frames dump only frame data source\n");
fprintf(output, " ascii include ASCII dump text (-x default)\n");
fprintf(output, " delimit delimit ASCII dump text with '|' characters\n");
fprintf(output, " noascii exclude ASCII dump text\n");
fprintf(output, " help display help for --hexdump and exit\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]]|.[N]\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");
fprintf(output, " --temp-dir <directory> write temporary files to this directory\n");
fprintf(output, " (default: %s)\n", g_get_tmp_dir());
fprintf(output, "\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 dissectors dump registered dissector names\n");
fprintf(output, " -G elastic-mapping dump ElasticSearch mapping file\n");
fprintf(output, " -G enterprises dump IANA Private Enterprise Number (PEN) table\n");
fprintf(output, " -G fieldcount dump count of header fields and exit\n");
fprintf(output, " -G fields [prefix] 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 manuf dump ethernet manufacturer 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 services dump transport service (port) names\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
hexdump_option_help(FILE *output)
{
fprintf(output, "%s\n", get_appname_and_version());
fprintf(output, "\n");
fprintf(output, "tshark: Valid --hexdump <hexoption> values include:\n");
fprintf(output, "\n");
fprintf(output, "Data source options:\n");
fprintf(output, " all add hexdump, dump all data sources (-x default)\n");
fprintf(output, " frames add hexdump, dump only frame data source\n");
fprintf(output, "\n");
fprintf(output, "ASCII options:\n");
fprintf(output, " ascii add hexdump, include ASCII dump text (-x default)\n");
fprintf(output, " delimit add hexdump, delimit ASCII dump text with '|' characters\n");
fprintf(output, " noascii add hexdump, exclude ASCII dump text\n");
fprintf(output, "\n");
fprintf(output, "Miscellaneous:\n");
fprintf(output, " help display this help and exit\n");
fprintf(output, "\n");
fprintf(output, "Example:\n");
fprintf(output, "\n");
fprintf(output, " $ tshark ... --hexdump frames --hexdump delimit ...\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
gather_tshark_compile_info(feature_list l)
{
/* Capture libraries */
gather_caplibs_compile_info(l);
epan_gather_compile_info(l);
}
static void
gather_tshark_runtime_info(feature_list l)
{
#ifdef HAVE_LIBPCAP
gather_caplibs_runtime_info(l);
#endif
/* stuff used by libwireshark */
epan_gather_runtime_info(l);
}
static gboolean
_compile_dfilter(const char *text, dfilter_t **dfp, const char *caller)
{
gboolean ok;
df_error_t *df_err;
char *err_off;
char *expanded;
gint64 elapsed_start;
elapsed_start = g_get_monotonic_time();
expanded = dfilter_expand(text, &df_err);
if (expanded == NULL) {
cmdarg_err("%s", df_err->msg);
df_error_free(&df_err);
return FALSE;
}
tshark_elapsed.dfilter_expand = g_get_monotonic_time() - elapsed_start;
elapsed_start = g_get_monotonic_time();
ok = dfilter_compile_full(expanded, dfp, &df_err, DF_OPTIMIZE, caller);
if (!ok ) {
cmdarg_err("%s", df_err->msg);
if (df_err->loc.col_start >= 0) {
err_off = ws_strdup_underline(NULL, df_err->loc.col_start, df_err->loc.col_len);
cmdarg_err_cont(" %s", expanded);
cmdarg_err_cont(" %s", err_off);
g_free(err_off);
}
df_error_free(&df_err);
}
tshark_elapsed.dfilter_compile = g_get_monotonic_time() - elapsed_start;
g_free(expanded);
return ok;
}
#define compile_dfilter(text, dfp) _compile_dfilter(text, dfp, __func__)
static gboolean
protocolfilter_add_opt(const char* arg, pf_flags filter_flags)
{
gchar **newfilter = NULL;
for (newfilter = wmem_strsplit(wmem_epan_scope(), arg, " ", -1); *newfilter; newfilter++) {
if (strcmp(*newfilter, "") == 0) {
/* Don't treat the empty string as an intended field abbreviation
* to output, consecutive spaces on the command line probably
* aren't intentional.
*/
continue;
}
if (!output_fields_add_protocolfilter(output_fields, *newfilter, filter_flags)) {
cmdarg_err("%s was already specified with different filter flags. Overwriting previous protocol filter.", *newfilter);
}
}
return TRUE;
}
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 */
constpath = g_get_tmp_dir();
#ifdef HAVE_LIBPCAP
/* global_capture_opts only exists in this case */
if (global_capture_opts.temp_dir)
constpath = global_capture_opts.temp_dir;
#endif
printf("%-21s\t%s\n", "Temp:", constpath);
/* 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
/* Personal Extcap */
constpath = get_extcap_pers_dir();
resultArray = g_strsplit(constpath, G_SEARCHPATH_SEPARATOR_S, 10);
for(i = 0; resultArray[i]; i++)
printf("%-21s\t%s\n", "Personal Extcap path:", g_strstrip(resultArray[i]));
g_strfreev(resultArray);
/* Global 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", "Global 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;
}
#ifdef HAVE_LIBPCAP
/*
* Check whether a purported *shark packet-matching expression (display
* or read filter) looks like a capture filter and, if so, print a
* warning.
*
* Used, for example, if the string in question isn't a valid packet-
* matching expression.
*/
static void
warn_about_capture_filter(const char *rfilter)
{
struct bpf_program fcode;
pcap_t *pc;
pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
if (pc != NULL) {
if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
pcap_freecode(&fcode);
cmdarg_err_cont(
" Note: That read filter code looks like a valid capture filter;\n"
" maybe you mixed them up?");
}
pcap_close(pc);
}
}
#endif
#ifdef HAVE_LIBPCAP
static GList *
capture_opts_get_interface_list(int *err, char **err_str)
{
/*
* This isn't a GUI tool, so no need for a callback.
*/
return capture_interface_list(err, err_str, NULL);
}
#endif
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},
{"hexdump", ws_required_argument, NULL, LONGOPT_HEXDUMP},
{"selected-frame", ws_required_argument, NULL, LONGOPT_SELECTED_FRAME},
{"print-timers", ws_no_argument, NULL, LONGOPT_PRINT_TIMERS},
{0, 0, 0, 0}
};
gboolean arg_error = FALSE;
gboolean has_extcap_options = FALSE;
gboolean is_capturing = TRUE;
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;
#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.