Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 845 insertions, 0 deletions

diff --git a/ui/commandline.c b/ui/commandline.c
new file mode 100644
index 0000000..374434e
--- /dev/null
+++ b/ui/commandline.c
@@ -0,0 +1,845 @@
+/* commandline.c
+ * Common command line handling between GUIs
+ *
+ * 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"
+
+#include <glib.h>
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <ws_exit_codes.h>
+#include <wsutil/ws_getopt.h>
+
+#include <wsutil/version_info.h>
+
+#include <wsutil/clopts_common.h>
+#include <wsutil/cmdarg_err.h>
+#include <wsutil/filesystem.h>
+#include <wsutil/ws_assert.h>
+#ifdef _WIN32
+#include <wsutil/console_win32.h>
+#endif
+
+#include <epan/ex-opt.h>
+#include <epan/packet.h>
+#include <epan/proto.h>
+#include <epan/prefs.h>
+#include <epan/prefs-int.h>
+#include <epan/stat_tap_ui.h>
+
+#include "capture_opts.h"
+#include "persfilepath_opt.h"
+#include "preference_utils.h"
+#include "recent.h"
+#include "decode_as_utils.h"
+
+#include "../file.h"
+
+#include "ui/dissect_opts.h"
+
+#include "ui/commandline.h"
+
+commandline_param_info_t global_commandline_info;
+
+capture_options global_capture_opts;
+
+void
+commandline_print_usage(gboolean for_help_option) {
+    FILE *output;
+
+#ifdef _WIN32
+    create_console();
+#endif
+
+    if (for_help_option) {
+        show_help_header("Interactively dump and analyze network traffic.");
+        output = stdout;
+    } else {
+        output = stderr;
+    }
+    fprintf(output, "\n");
+    fprintf(output, "Usage: wireshark [options] ... [ <infile> ]\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 display:\n");
+    fprintf(output, "  -k                       start capturing immediately (def: do nothing)\n");
+    fprintf(output, "  -S                       update packet display when new packets are captured\n");
+    fprintf(output, "  --update-interval        interval between updates with new packets (def: %dms)\n", DEFAULT_UPDATE_INTERVAL);
+    fprintf(output, "  -l                       turn on automatic scrolling while -S is in use\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 (no pipes or stdin!)\n");
+
+    fprintf(output, "\n");
+    fprintf(output, "Processing:\n");
+    fprintf(output, "  -R <read filter>, --read-filter <read filter>\n");
+    fprintf(output, "                           packet filter in Wireshark display filter syntax\n");
+    fprintf(output, "  -n                       disable all name resolutions (def: all enabled)\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, "  --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 <proto_name>\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, "User interface:\n");
+    fprintf(output, "  -C <config profile>      start with specified configuration profile\n");
+    fprintf(output, "  -H                       hide the capture info dialog during packet capture\n");
+    fprintf(output, "  -Y <display filter>, --display-filter <display filter>\n");
+    fprintf(output, "                           start with the given display filter\n");
+    fprintf(output, "  -g <packet number>       go to specified packet number after \"-r\"\n");
+    fprintf(output, "  -J <jump filter>         jump to the first packet matching the (display)\n");
+    fprintf(output, "                           filter\n");
+    fprintf(output, "  -j                       search backwards for a matching packet after \"-J\"\n");
+    fprintf(output, "  -t (a|ad|adoy|d|dd|e|r|u|ud|udoy)[.[N]]|.[N]\n");
+    fprintf(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, "  -X <key>:<value>         eXtension options, see man page for details\n");
+    fprintf(output, "  -z <statistics>          show various statistics, see man page for details\n");
+
+    fprintf(output, "\n");
+    fprintf(output, "Output:\n");
+    fprintf(output, "  -w <outfile|->           set the output filename (or '-' for stdout)\n");
+#ifdef HAVE_LIBPCAP
+    fprintf(output, "  --capture-comment <comment>\n");
+    fprintf(output, "                           add a capture file comment, if supported\n");
+#endif
+    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, "  -P <key>:<path>          persconf:path - personal configuration files\n");
+    fprintf(output, "                           persdata:path - personal data files\n");
+    fprintf(output, "  -o <name>:<value> ...    override preference or recent setting\n");
+    fprintf(output, "  -K <keytab>              keytab file to use for kerberos decryption\n");
+#ifndef _WIN32
+    fprintf(output, "  --display <X display>    X display to use\n");
+#endif
+    fprintf(output, "  --fullscreen             start Wireshark in full screen\n");
+
+#ifdef _WIN32
+    destroy_console();
+#endif
+}
+
+#define LONGOPT_FULL_SCREEN     LONGOPT_BASE_GUI+1
+#define LONGOPT_CAPTURE_COMMENT LONGOPT_BASE_GUI+2
+
+#define OPTSTRING OPTSTRING_CAPTURE_COMMON OPTSTRING_DISSECT_COMMON "C:g:HhjJ:klm:o:P:r:R:Svw:X:Y:z:"
+static const struct ws_option long_options[] = {
+        {"help", ws_no_argument, NULL, 'h'},
+        {"read-file", ws_required_argument, NULL, 'r' },
+        {"read-filter", ws_required_argument, NULL, 'R' },
+        {"display-filter", ws_required_argument, NULL, 'Y' },
+        {"version", ws_no_argument, NULL, 'v'},
+        {"fullscreen", ws_no_argument, NULL, LONGOPT_FULL_SCREEN },
+        {"capture-comment", ws_required_argument, NULL, LONGOPT_CAPTURE_COMMENT},
+        LONGOPT_CAPTURE_COMMON
+        LONGOPT_DISSECT_COMMON
+        {0, 0, 0, 0 }
+    };
+static const char optstring[] = OPTSTRING;
+
+#ifndef HAVE_LIBPCAP
+static void print_no_capture_support_error(void)
+{
+    cmdarg_err("This version of Wireshark was not built with support for capturing packets.");
+}
+#endif
+
+void commandline_early_options(int argc, char *argv[])
+{
+    int opt;
+#ifdef HAVE_LIBPCAP
+    int err;
+    GList *if_list;
+    gchar *err_str;
+    int exit_status;
+#else
+    gboolean capture_option_specified;
+#endif
+
+    /*
+     * 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 addition, we process "console only" parameters (ones where we
+     * send output to the console and exit) here, so we don't start GUI
+     * if we're only showing command-line help or version information.
+     *
+     * XXX - this pre-scan is done before we start GUI, so we haven't
+     * run "GUI init function" on the arguments.  That means that GUI-specific
+     * arguments have not been removed from the argument list; those arguments
+     * begin with "--", and will be treated as an error by getopt_long().
+     *
+     * We thus ignore errors - *and* set "ws_opterr" to 0 to suppress the
+     * error messages.
+     *
+     * 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, so we have another getopt_long()
+     * call later.
+     *
+     * 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?
+     *
+     * Note that we don't want to initialize libwireshark until after the
+     * GUI is up, as that can take a while, and we want a window of some
+     * sort up to show progress while that's happening.
+     */
+    ws_opterr = 0;
+
+#ifndef HAVE_LIBPCAP
+    capture_option_specified = FALSE;
+#endif
+    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 if (profile_exists (ws_optarg, TRUE)) {
+                    char  *pf_dir_path, *pf_dir_path2, *pf_filename;
+                    /* Copy from global profile */
+                    if (create_persconffile_profile(ws_optarg, &pf_dir_path) == -1) {
+                        cmdarg_err("Can't create directory\n\"%s\":\n%s.",
+                            pf_dir_path, g_strerror(errno));
+
+                        g_free(pf_dir_path);
+                        exit(WS_EXIT_INVALID_FILE);
+                    }
+                    if (copy_persconffile_profile(ws_optarg, ws_optarg, TRUE, &pf_filename,
+                            &pf_dir_path, &pf_dir_path2) == -1) {
+                        cmdarg_err("Can't copy file \"%s\" in directory\n\"%s\" to\n\"%s\":\n%s.",
+                            pf_filename, pf_dir_path2, pf_dir_path, g_strerror(errno));
+
+                        g_free(pf_filename);
+                        g_free(pf_dir_path);
+                        g_free(pf_dir_path2);
+                        exit(WS_EXIT_INVALID_FILE);
+                    }
+                    set_profile_name (ws_optarg);
+                } else {
+                    cmdarg_err("Configuration Profile \"%s\" does not exist", ws_optarg);
+                    exit(1);
+                }
+                break;
+            case 'D':        /* Print a list of capture devices and exit */
+#ifdef HAVE_LIBPCAP
+                exit_status = EXIT_SUCCESS;
+                if_list = capture_interface_list(&err, &err_str, NULL);
+                if (err != 0) {
+                    /*
+                     * An error occurred when fetching the local
+                     * interfaces.  Report it.
+                     */
+#ifdef _WIN32
+                    create_console();
+#endif /* _WIN32 */
+                    cmdarg_err("%s", err_str);
+                    g_free(err_str);
+                    exit_status = WS_EXIT_PCAP_ERROR;
+                }
+                if (if_list == NULL) {
+                    /*
+                     * No interfaces were found.  If that's not the
+                     * result of an error when fetching the local
+                     * interfaces, let the user know.
+                     */
+                    if (err == 0) {
+                        cmdarg_err("There are no interfaces on which a capture can be done");
+                        exit_status = WS_EXIT_NO_INTERFACES;
+                    }
+                    exit(exit_status);
+                }
+#ifdef _WIN32
+                create_console();
+#endif /* _WIN32 */
+                capture_opts_print_interfaces(if_list);
+                free_interface_list(if_list);
+#ifdef _WIN32
+                destroy_console();
+#endif /* _WIN32 */
+                exit(exit_status);
+#else /* HAVE_LIBPCAP */
+                capture_option_specified = TRUE;
+#endif /* HAVE_LIBPCAP */
+                break;
+            case 'h':        /* Print help and exit */
+                commandline_print_usage(TRUE);
+                exit(EXIT_SUCCESS);
+                break;
+#ifdef _WIN32
+            case 'i':
+                if (strcmp(ws_optarg, "-") == 0)
+                    set_stdin_capture(TRUE);
+                break;
+#endif
+            case 'P':        /* Personal file directory path settings - change these before the Preferences and alike are processed */
+                if (!persfilepath_opt(opt, ws_optarg)) {
+                    cmdarg_err("-P flag \"%s\" failed (hint: is it quoted and existing?)", ws_optarg);
+                    exit(EXIT_SUCCESS);
+                }
+                break;
+            case 'v':        /* Show version and exit */
+#ifdef _WIN32
+                create_console();
+#endif
+                show_version();
+#ifdef _WIN32
+                destroy_console();
+#endif
+                exit(EXIT_SUCCESS);
+                break;
+            case 'X':
+                /*
+                 *  Extension command line options have to be processed before
+                 *  we call epan_init() as they are supposed to be used by dissectors
+                 *  or taps very early in the registration process.
+                 */
+                ex_opt_add(ws_optarg);
+                break;
+            case '?':        /* Ignore errors - the "real" scan will catch them. */
+                break;
+        }
+    }
+
+#ifndef HAVE_LUA
+    if (ex_opt_count("lua_script") > 0) {
+        cmdarg_err("This version of Wireshark was not built with support for Lua scripting.");
+        exit(1);
+    }
+#endif
+
+#ifndef HAVE_LIBPCAP
+    if (capture_option_specified) {
+        print_no_capture_support_error();
+        commandline_print_usage(FALSE);
+        exit(EXIT_SUCCESS);
+    }
+#endif
+}
+
+void commandline_override_prefs(int argc, char *argv[], gboolean opt_reset)
+{
+    int opt;
+
+    /*
+     * To reset the options parser, set ws_optreset to 1 and set ws_optind to 1.
+     *
+     * Ignore errors and keep ws_opterr as 0; error messages will be printed
+     * later by command_other_options()
+     */
+    if (opt_reset) {
+        ws_optreset = 1;
+        ws_optind = 1;
+        ws_opterr = 0;
+    }
+
+    /* Initialize with default values */
+    global_commandline_info.user_opts = NULL;
+
+    while ((opt = ws_getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
+        switch (opt) {
+            case 'o':        /* Override preference from command line */
+            {
+                char *errmsg = NULL;
+
+                switch (prefs_set_pref(ws_optarg, &errmsg)) {
+                    case PREFS_SET_OK:
+                        global_commandline_info.user_opts =
+                                g_slist_prepend(global_commandline_info.user_opts,
+                                        g_strdup(ws_optarg));
+                        break;
+                    case PREFS_SET_SYNTAX_ERR:
+                        cmdarg_err("Invalid -o flag \"%s\"%s%s", ws_optarg,
+                                errmsg ? ": " : "", errmsg ? errmsg : "");
+                        g_free(errmsg);
+                        exit_application(1);
+                        break;
+                    case PREFS_SET_NO_SUCH_PREF:
+                    /* not a preference, might be a recent setting */
+                        switch (recent_set_arg(ws_optarg)) {
+                            case PREFS_SET_OK:
+                                break;
+                            case PREFS_SET_SYNTAX_ERR:
+                                /* shouldn't happen, checked already above */
+                                cmdarg_err("Invalid -o flag \"%s\"", ws_optarg);
+                                exit_application(1);
+                                break;
+                            case PREFS_SET_NO_SUCH_PREF:
+                            case PREFS_SET_OBSOLETE:
+                                cmdarg_err("-o flag \"%s\" specifies unknown preference/recent value",
+                                           ws_optarg);
+                                exit_application(1);
+                                break;
+                            default:
+                                ws_assert_not_reached();
+                        }
+                        break;
+                    case PREFS_SET_OBSOLETE:
+                        cmdarg_err("-o flag \"%s\" specifies obsolete preference",
+                                   ws_optarg);
+                        exit_application(1);
+                        break;
+                    default:
+                        ws_assert_not_reached();
+                }
+                break;
+            }
+            default:
+            case '?':        /* Ignore errors - the "real" scan will catch them. */
+                break;
+            }
+    }
+
+    /* Since we prepended each option when processing `-o`, reverse the list
+     * in case the order of options becomes meaningful.
+     */
+    global_commandline_info.user_opts = g_slist_reverse(global_commandline_info.user_opts);
+
+}
+
+void commandline_other_options(int argc, char *argv[], gboolean opt_reset)
+{
+    int opt;
+    gboolean arg_error = FALSE;
+#ifdef HAVE_LIBPCAP
+    const char *list_option_supplied = NULL;
+    int status;
+#else
+    gboolean capture_option_specified;
+#endif
+
+    /*
+     * To reset the options parser, set ws_optreset to 1 and set ws_optind to 1.
+     *
+     * Also reset ws_opterr to 1, so that error messages are printed by
+     * getopt_long().
+     *
+     * XXX - if we want to control all the command-line option errors, so
+     * that we can display them where we choose (e.g., in a window), we'd
+     * want to leave ws_opterr as 0, and produce our own messages using ws_optopt.
+     * We'd have to check the value of ws_optopt to see if it's a valid option
+     * letter, in which case *presumably* the error is "this option requires
+     * an argument but none was specified", or not a valid option letter,
+     * in which case *presumably* the error is "this option isn't valid".
+     * Some versions of getopt() let you supply a option string beginning
+     * with ':', which means that getopt() will return ':' rather than '?'
+     * for "this option requires an argument but none was specified", but
+     * not all do.  But we're now using getopt_long() - what does it do?
+     */
+    if (opt_reset) {
+        ws_optreset = 1;
+        ws_optind = 1;
+        ws_opterr = 1;
+    }
+
+    /* Initialize with default values */
+    global_commandline_info.jump_backwards = SD_FORWARD;
+    global_commandline_info.go_to_packet = 0;
+    global_commandline_info.jfilter = NULL;
+    global_commandline_info.cf_name = NULL;
+    global_commandline_info.rfilter = NULL;
+    global_commandline_info.dfilter = NULL;
+#ifdef HAVE_LIBPCAP
+    global_commandline_info.start_capture = FALSE;
+    global_commandline_info.list_link_layer_types = FALSE;
+    global_commandline_info.list_timestamp_types = FALSE;
+    global_commandline_info.quit_after_cap = getenv("WIRESHARK_QUIT_AFTER_CAPTURE") ? TRUE : FALSE;
+    global_commandline_info.capture_comments = NULL;
+#endif
+    global_commandline_info.full_screen = FALSE;
+
+    while ((opt = ws_getopt_long(argc, argv, optstring, long_options, NULL)) != -1) {
+        switch (opt) {
+            /*** capture option specific ***/
+            case 'a':        /* autostop criteria */
+            case 'b':        /* Ringbuffer option */
+            case 'c':        /* Capture xxx packets */
+            case 'f':        /* capture filter */
+            case 'H':        /* Hide capture info dialog box */
+            case 'p':        /* Don't capture in promiscuous mode */
+            case 'i':        /* Use interface x */
+            case LONGOPT_SET_TSTAMP_TYPE: /* Set capture timestamp type */
+            case LONGOPT_CAPTURE_TMPDIR: /* capture temp directory */
+            case LONGOPT_UPDATE_INTERVAL: /* sync pipe update interval */
+#ifdef HAVE_PCAP_CREATE
+            case 'I':        /* Capture in monitor mode, if available */
+#endif
+#ifdef HAVE_PCAP_REMOTE
+            case 'A':        /* Authentication */
+#endif
+            case 's':        /* Set the snapshot (capture) length */
+            case 'S':        /* "Sync" mode: used for following file ala tail -f */
+            case 'w':        /* Write to capture file xxx */
+            case 'y':        /* Set the pcap data link type */
+#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
+            case 'B':        /* Buffer size */
+#endif
+#ifdef HAVE_LIBPCAP
+                status = capture_opts_add_opt(&global_capture_opts, opt, ws_optarg);
+                if(status != 0) {
+                    exit_application(status);
+                }
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+
+            /*** all non capture option specific ***/
+            case 'C':
+                /* Configuration profile settings were already processed just ignore them this time*/
+                break;
+            case 'j':        /* Search backwards for a matching packet from filter in option J */
+                global_commandline_info.jump_backwards = SD_BACKWARD;
+                break;
+            case 'g':        /* Go to packet with the given packet number */
+                global_commandline_info.go_to_packet = get_nonzero_guint32(ws_optarg, "go to packet");
+                break;
+            case 'J':        /* Jump to the first packet which matches the filter criteria */
+                global_commandline_info.jfilter = ws_optarg;
+                break;
+            case 'k':        /* Start capture immediately */
+#ifdef HAVE_LIBPCAP
+                global_commandline_info.start_capture = TRUE;
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+            case 'l':        /* Automatic scrolling in live capture mode */
+#ifdef HAVE_LIBPCAP
+                recent.capture_auto_scroll = TRUE;
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+            case 'L':        /* Print list of link-layer types and exit */
+#ifdef HAVE_LIBPCAP
+                global_commandline_info.list_link_layer_types = TRUE;
+                list_option_supplied = "-L";
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+            case LONGOPT_LIST_TSTAMP_TYPES:
+#ifdef HAVE_LIBPCAP
+                global_commandline_info.list_timestamp_types = TRUE;
+                list_option_supplied = "--list-time-stamp-types";
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+            case 'o':        /* Override preference from command line */
+                /* Pref overrides were already processed just ignore them this time*/
+                break;
+            case 'P':
+                /* Path settings were already processed just ignore them this time*/
+                break;
+            case 'r':        /* Read capture file xxx */
+                /* We may set "last_open_dir" to "cf_name", and if we change
+                 "last_open_dir" later, we free the old value, so we have to
+                 set "cf_name" to something that's been allocated. */
+                global_commandline_info.cf_name = g_strdup(ws_optarg);
+                break;
+            case 'R':        /* Read file filter */
+                global_commandline_info.rfilter = ws_optarg;
+                break;
+            case 'X':
+                /* ext ops were already processed just ignore them this time*/
+                break;
+            case 'Y':
+                global_commandline_info.dfilter = ws_optarg;
+                break;
+            case 'z':
+                /* We won't call the init function for the stat this soon
+                 as it would disallow MATE's fields (which are registered
+                 by the preferences set callback) from being used as
+                 part of a tap filter.  Instead, we just add the argument
+                 to a list of stat arguments. */
+                if (strcmp("help", ws_optarg) == 0) {
+                  fprintf(stderr, "wireshark: The available statistics for the \"-z\" option are:\n");
+                  list_stat_cmd_args();
+                  exit_application(0);
+                }
+                if (!process_stat_cmd_arg(ws_optarg)) {
+                    cmdarg_err("Invalid -z argument.");
+                    cmdarg_err_cont("  -z argument must be one of :");
+                    list_stat_cmd_args();
+                    exit_application(1);
+                }
+                break;
+            case 'd':        /* Decode as rule */
+            case 'K':        /* Kerberos keytab file */
+            case 'n':        /* No name resolution */
+            case 'N':        /* Select what types of addresses/port #s to resolve */
+            case 't':        /* time stamp type */
+            case 'u':        /* Seconds type */
+            case LONGOPT_DISABLE_PROTOCOL: /* disable dissection of protocol */
+            case LONGOPT_ENABLE_HEURISTIC: /* enable heuristic dissection of protocol */
+            case LONGOPT_DISABLE_HEURISTIC: /* disable heuristic dissection of protocol */
+            case LONGOPT_ENABLE_PROTOCOL: /* enable dissection of protocol (that is disabled by default) */
+            case LONGOPT_ONLY_PROTOCOLS: /* enable dissection of these comma separated protocols only */
+            case LONGOPT_DISABLE_ALL_PROTOCOLS: /* disable dissection of all protocols */
+                if (!dissect_opts_handle_opt(opt, ws_optarg))
+                   exit_application(1);
+                break;
+            case LONGOPT_FULL_SCREEN:
+                global_commandline_info.full_screen = TRUE;
+                break;
+#ifdef HAVE_LIBPCAP
+            case LONGOPT_CAPTURE_COMMENT:  /* capture comment */
+                if (global_commandline_info.capture_comments == NULL) {
+                    global_commandline_info.capture_comments = g_ptr_array_new_with_free_func(g_free);
+                }
+                g_ptr_array_add(global_commandline_info.capture_comments, g_strdup(ws_optarg));
+#else
+                capture_option_specified = TRUE;
+                arg_error = TRUE;
+#endif
+                break;
+            default:
+            case '?':        /* Bad flag - print usage message */
+                arg_error = TRUE;
+                break;
+            }
+    }
+
+    if (!arg_error) {
+        argc -= ws_optind;
+        argv += ws_optind;
+        if (argc >= 1) {
+            if (global_commandline_info.cf_name != NULL) {
+                /*
+                 * Input file name specified with "-r" *and* specified as a regular
+                 * command-line argument.
+                 */
+                cmdarg_err("File name specified both with -r and regular argument");
+                arg_error = TRUE;
+            } else {
+                /*
+                 * Input file name not specified with "-r", and a command-line argument
+                 * was specified; treat it as the input file name.
+                 *
+                 * Yes, this is different from tshark, where non-flag command-line
+                 * arguments are a filter, but this works better on GUI desktops
+                 * where a command can be specified to be run to open a particular
+                 * file - yes, you could have "-r" as the last part of the command,
+                 * but that's a bit ugly.
+                 */
+                global_commandline_info.cf_name = g_strdup(argv[0]);
+            }
+            argc--;
+            argv++;
+        }
+
+        if (argc != 0) {
+            /*
+             * Extra command line arguments were specified; complain.
+             */
+            cmdarg_err("Invalid argument: %s", argv[0]);
+            arg_error = TRUE;
+        }
+    }
+
+    if (arg_error) {
+#ifndef HAVE_LIBPCAP
+        if (capture_option_specified) {
+            print_no_capture_support_error();
+        }
+#endif
+        commandline_print_usage(FALSE);
+        exit_application(1);
+    }
+
+#ifdef HAVE_LIBPCAP
+    if (global_commandline_info.start_capture && list_option_supplied) {
+        /* Specifying *both* is bogus. */
+        cmdarg_err("You can't specify both %s and a live capture.", list_option_supplied);
+        exit_application(1);
+    }
+
+    if (list_option_supplied) {
+        /* We're supposed to list the link-layer types for an interface;
+           did the user also specify a capture file to be read? */
+        if (global_commandline_info.cf_name) {
+            /* Yes - that's bogus. */
+            cmdarg_err("You can't specify %s and a capture file to be read.", list_option_supplied);
+            exit_application(1);
+        }
+        /* No - did they specify a ring buffer option? */
+        if (global_capture_opts.multi_files_on) {
+            cmdarg_err("Ring buffer requested, but a capture isn't being done.");
+            exit_application(1);
+        }
+    } else {
+        /* We're supposed to do a live capture; did the user also specify
+           a capture file to be read? */
+        if (global_commandline_info.start_capture && global_commandline_info.cf_name) {
+            /* Yes - that's bogus. */
+            cmdarg_err("You can't specify both a live capture and a capture file to be read.");
+            exit_application(1);
+        }
+
+        /* No - was the ring buffer option specified and, if so, does it make
+           sense? */
+        if (global_capture_opts.multi_files_on) {
+            /* Ring buffer works only under certain conditions:
+             a) ring buffer does not work with temporary files;
+             b) real_time_mode and multi_files_on are mutually exclusive -
+             real_time_mode takes precedence;
+             c) it makes no sense to enable the ring buffer if the maximum
+             file size is set to "infinite". */
+            if (global_capture_opts.save_file == NULL) {
+                cmdarg_err("Ring buffer requested, but capture isn't being saved to a permanent file.");
+                global_capture_opts.multi_files_on = FALSE;
+            }
+            if (!global_capture_opts.has_autostop_filesize &&
+                !global_capture_opts.has_file_duration &&
+                !global_capture_opts.has_file_interval &&
+                !global_capture_opts.has_file_packets) {
+                cmdarg_err("Ring buffer requested, but no maximum capture file size, duration, interval or packets were specified.");
+                /* XXX - this must be redesigned as the conditions changed */
+            }
+        }
+    }
+#endif
+}
+
+/* Local function used by commandline_options_drop */
+static int cl_find_custom(gconstpointer elem_data, gconstpointer search_data) {
+    return memcmp(elem_data, search_data, strlen((char *)search_data));
+}
+
+/* Drop any options the user specified on the command line with `-o`
+ * that have the given module and preference names
+ */
+void commandline_options_drop(const char *module_name, const char *pref_name) {
+    GSList *elem;
+    char *opt_prefix;
+
+    if (global_commandline_info.user_opts == NULL) return;
+
+    opt_prefix = ws_strdup_printf("%s.%s:", module_name, pref_name);
+
+    while (NULL != (elem = g_slist_find_custom(global_commandline_info.user_opts,
+                        (gconstpointer)opt_prefix, cl_find_custom))) {
+        global_commandline_info.user_opts =
+                g_slist_remove_link(global_commandline_info.user_opts, elem);
+        g_free(elem->data);
+        g_slist_free_1(elem);
+    }
+    g_free(opt_prefix);
+}
+
+/* Reapply any options the user specified on the command line with `-o`
+ * Called in the Qt UI when reloading Lua plugins
+ * For https://gitlab.com/wireshark/wireshark/-/issues/12331
+ */
+void commandline_options_reapply(void) {
+    char *errmsg = NULL;
+    GSList *entry = NULL;
+
+    for (entry = global_commandline_info.user_opts; entry != NULL; entry = g_slist_next(entry)) {
+        /* Although these options are from the user-supplied command line,
+         * they were checked for validity before we added them to user_opts,
+         * so we don't check them again here. In the worst case, a pref is
+         * specified for a lua plugin which has been edited after Wireshark
+         * started and has had that pref removed; not worth exiting over.
+         * See #12331
+         */
+        prefs_set_pref((char *)entry->data, &errmsg);
+        if (errmsg != NULL) {
+            g_free(errmsg);
+            errmsg = NULL;
+        }
+    }
+}
+
+/* Free memory used to hold user-specified command line options */
+void commandline_options_free(void) {
+    g_slist_free_full(global_commandline_info.user_opts, g_free);
+}