WireGuard: implement initiation message decryption with static keys
[metze/wireshark/wip.git] / extcap.c
index 179a2cd6a7c63d2893acabbc2defdee2d7479ffa..1744655685cc53fcab51df8600129685484c7b09 100644 (file)
--- a/extcap.c
+++ b/extcap.c
@@ -7,7 +7,7 @@
  * By Gerald Combs <gerald@wireshark.org>
  * Copyright 1998 Gerald Combs
  *
- * SPDX-License-Identifier: GPL-2.0+
+ * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include <config.h>
@@ -25,9 +25,7 @@
 #include <unistd.h>
 #endif
 
-#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
-#endif
 #ifdef HAVE_SYS_WAIT_H
 #include <sys/wait.h>
 #endif
 
 #include "ui/iface_toolbar.h"
 
-#include <wsutil/glib-compat.h>
 #include <wsutil/file_util.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/ws_pipe.h>
 #include <wsutil/tempfile.h>
 
 #include "capture_opts.h"
 
 #include "extcap.h"
 #include "extcap_parser.h"
-#include "extcap_spawn.h"
+
+#include "version_info.h"
 
 #ifdef _WIN32
 static HANDLE pipe_h = INVALID_HANDLE_VALUE;
@@ -96,6 +95,9 @@ static void extcap_load_interface_list(void);
 GHashTable *
 extcap_loaded_interfaces(void)
 {
+    if (prefs.capture_no_extcap)
+        return NULL;
+
     if ( !_loaded_interfaces || g_hash_table_size(_loaded_interfaces) == 0 )
         extcap_load_interface_list();
 
@@ -221,8 +223,7 @@ extcap_free_toolbar_control(iface_toolbar_control *control)
     if (control->ctrl_type == INTERFACE_TYPE_STRING) {
         g_free(control->default_value.string);
     }
-    g_list_foreach(control->values, (GFunc)extcap_free_toolbar_value, NULL);
-    g_list_free(control->values);
+    g_list_free_full(control->values, (GDestroyNotify)extcap_free_toolbar_value);
     g_free(control);
 }
 
@@ -239,8 +240,7 @@ extcap_free_toolbar(gpointer data)
     g_free(toolbar->menu_title);
     g_free(toolbar->help);
     g_list_free_full(toolbar->ifnames, g_free);
-    g_list_foreach(toolbar->controls, (GFunc)extcap_free_toolbar_control, NULL);
-    g_list_free(toolbar->controls);
+    g_list_free_full(toolbar->controls, (GDestroyNotify)extcap_free_toolbar_control);
     g_free(toolbar);
 }
 
@@ -284,9 +284,39 @@ extcap_iface_toolbar_add(const gchar *extcap, iface_toolbar *toolbar_entry)
     g_free(toolname);
 }
 
+static gchar **
+extcap_convert_arguments_to_array(GList * arguments)
+{
+    gchar ** result = NULL;
+    if ( arguments )
+    {
+        GList * walker = g_list_first(arguments);
+        int cnt = 0;
+
+        result = (gchar **) g_malloc0(sizeof(gchar *) * (g_list_length(arguments)));
+
+        while(walker)
+        {
+            result[cnt] = g_strdup((const gchar *)walker->data);
+            walker = g_list_next(walker);
+            cnt++;
+        }
+    }
+    return result;
+}
+
+static void extcap_free_array(gchar ** args, int argc)
+{
+    int cnt = 0;
+
+    for ( cnt = 0; cnt < argc; cnt++ )
+        g_free(args[cnt]);
+    g_free(args);
+}
+
 /* Note: args does not need to be NULL-terminated. */
-static gboolean extcap_foreach(gint argc, gchar **args,
-                                      extcap_cb_t cb, extcap_callback_info_t cb_info)
+static gboolean extcap_foreach(GList * arguments,
+                                      extcap_cb_t cb, extcap_callback_info_t cb_info, GList * fallback_arguments)
 {
     GDir *dir;
     gboolean keep_going;
@@ -294,10 +324,12 @@ static gboolean extcap_foreach(gint argc, gchar **args,
 
     keep_going = TRUE;
 
-    if ((dir = g_dir_open(dirname, 0, NULL)) != NULL)
+    if (arguments && (dir = g_dir_open(dirname, 0, NULL)) != NULL)
     {
         GString *extcap_path = NULL;
         const gchar *file;
+        gchar ** args = extcap_convert_arguments_to_array(arguments);
+        int cnt = g_list_length(arguments);
 
         extcap_path = g_string_new("");
         while (keep_going && (file = g_dir_read_name(dir)) != NULL)
@@ -315,17 +347,31 @@ static gboolean extcap_foreach(gint argc, gchar **args,
                     continue;
                 }
 
-                if (extcap_spawn_sync((gchar *) dirname, extcap_path->str, argc, args, &command_output))
+                if (ws_pipe_spawn_sync((gchar *) dirname, extcap_path->str, cnt, args, &command_output))
                 {
                     cb_info.output = command_output;
                     cb_info.extcap = extcap_path->str;
 
                     keep_going = cb(cb_info);
                 }
+                else if ( fallback_arguments )
+                {
+                    gchar ** fb_args = extcap_convert_arguments_to_array(fallback_arguments);
+
+                    if (ws_pipe_spawn_sync((gchar *) dirname, extcap_path->str, g_list_length(fallback_arguments), fb_args, &command_output))
+                    {
+                        cb_info.output = command_output;
+                        cb_info.extcap = extcap_path->str;
+
+                        keep_going = cb(cb_info);
+                    }
+                }
 
                 g_free(command_output);
             }
+
         }
+        extcap_free_array(args, cnt);
 
         g_dir_close(dir);
         g_string_free(extcap_path, TRUE);
@@ -416,8 +462,7 @@ static gboolean cb_dlt(extcap_callback_info_t cb_info)
 if_capabilities_t *
 extcap_get_if_dlts(const gchar *ifname, char **err_str)
 {
-    gchar *argv[3];
-    gint i;
+    GList * arguments = NULL;
     if_capabilities_t *caps = NULL;
 
     if (err_str != NULL)
@@ -427,21 +472,18 @@ extcap_get_if_dlts(const gchar *ifname, char **err_str)
 
     if (extcap_if_exists(ifname))
     {
-        argv[0] = g_strdup(EXTCAP_ARGUMENT_LIST_DLTS);
-        argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
-        argv[2] = g_strdup(ifname);
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_LIST_DLTS));
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_INTERFACE));
+        arguments = g_list_append(arguments, g_strdup(ifname));
 
         extcap_callback_info_t cb_info;
         cb_info.data = &caps;
         cb_info.err_str = err_str;
         cb_info.ifname = ifname;
 
-        extcap_foreach(3, argv, cb_dlt, cb_info);
+        extcap_foreach(arguments, cb_dlt, cb_info, NULL);
 
-        for (i = 0; i < 3; ++i)
-        {
-            g_free(argv[i]);
-        }
+        g_list_free_full(arguments, g_free);
     }
 
     return caps;
@@ -472,8 +514,7 @@ static void extcap_free_interfaces(GList *interfaces)
         return;
     }
 
-    g_list_foreach(interfaces, (GFunc)extcap_free_interface, NULL);
-    g_list_free(interfaces);
+    g_list_free_full(interfaces, extcap_free_interface);
 }
 
 static gint
@@ -505,6 +546,9 @@ append_extcap_interface_list(GList *list, char **err_str _U_)
     extcap_interface *data = NULL;
     GList *ifutilkeys_head = NULL, *ifutilkeys = NULL;
 
+    if (prefs.capture_no_extcap)
+        return list;
+
     /* Update the extcap interfaces and get a list of their if_infos */
     if ( !_loaded_interfaces || g_hash_table_size(_loaded_interfaces) == 0 )
         extcap_load_interface_list();
@@ -563,6 +607,9 @@ extcap_register_preferences_callback(gpointer key, gpointer value _U_, gpointer
 
 void extcap_register_preferences(void)
 {
+    if (prefs.capture_no_extcap)
+        return;
+
     module_t *dev_module = prefs_find_module("extcap");
 
     if (!dev_module)
@@ -765,31 +812,90 @@ static gboolean cb_preference(extcap_callback_info_t cb_info)
 GList *
 extcap_get_if_configuration(const char *ifname)
 {
-    gchar *argv[3];
+    GList * arguments = NULL;
     GList *ret = NULL;
     gchar **err_str = NULL;
-    int i;
 
     if (extcap_if_exists(ifname))
     {
         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
               get_extcap_dir());
 
-        argv[0] = g_strdup(EXTCAP_ARGUMENT_CONFIG);
-        argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
-        argv[2] = g_strdup(ifname);
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_CONFIG));
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_INTERFACE));
+        arguments = g_list_append(arguments, g_strdup(ifname));
 
         extcap_callback_info_t cb_info;
         cb_info.data = &ret;
         cb_info.err_str = err_str;
         cb_info.ifname = ifname;
 
-        extcap_foreach(3, argv, cb_preference, cb_info);
+        extcap_foreach(arguments, cb_preference, cb_info, NULL);
 
-        for (i = 0; i < 3; i++)
+        g_list_free_full(arguments, g_free);
+    }
+
+    return ret;
+}
+
+static gboolean cb_reload_preference(extcap_callback_info_t cb_info)
+{
+    GList *arguments = NULL, * walker = NULL;
+    GList **il = (GList **) cb_info.data;
+
+    arguments = extcap_parse_values(cb_info.output);
+
+    walker = g_list_first((GList *)(arguments));
+    while (walker != NULL)
+    {
+        extcap_value * val = (extcap_value *)walker->data;
+        *il = g_list_append(*il, val);
+        walker = g_list_next(walker);
+    }
+    g_list_free(arguments);
+
+    /* By returning false, extcap_foreach will break on first found */
+    return FALSE;
+}
+
+GList *
+extcap_get_if_configuration_values(const char * ifname, const char * argname, GHashTable *arguments)
+{
+    GList * args = NULL;
+    GList *ret = NULL;
+    gchar **err_str = NULL;
+
+    if (extcap_if_exists(ifname))
+    {
+        g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
+              get_extcap_dir());
+
+        args = g_list_append(args, g_strdup(EXTCAP_ARGUMENT_CONFIG));
+        args = g_list_append(args, g_strdup(EXTCAP_ARGUMENT_INTERFACE));
+        args = g_list_append(args, g_strdup(ifname));
+        args = g_list_append(args, g_strdup(EXTCAP_ARGUMENT_RELOAD_OPTION));
+        args = g_list_append(args, g_strdup(argname));
+
+        if ( arguments )
         {
-            g_free(argv[i]);
+            GList * keys = g_hash_table_get_keys(arguments);
+            while ( keys )
+            {
+                const gchar * key_data = (const gchar *)keys->data;
+                args = g_list_append(args, g_strdup(key_data));
+                args = g_list_append(args, g_strdup((const gchar *)g_hash_table_lookup(arguments, key_data)));
+                keys = g_list_next(keys);
+            }
         }
+
+        extcap_callback_info_t cb_info;
+        cb_info.data = &ret;
+        cb_info.err_str = err_str;
+        cb_info.ifname = ifname;
+
+        extcap_foreach(args, cb_reload_preference, cb_info, NULL);
+
+        g_list_free_full(args, g_free);
     }
 
     return ret;
@@ -899,7 +1005,7 @@ static gboolean cb_verify_filter(extcap_callback_info_t cb_info)
 extcap_filter_status
 extcap_verify_capture_filter(const char *ifname, const char *filter, gchar **err_str)
 {
-    gchar *argv[4];
+    GList * arguments = NULL;
     extcap_filter_status status = EXTCAP_FILTER_UNKNOWN;
 
     if (extcap_if_exists(ifname))
@@ -907,17 +1013,18 @@ extcap_verify_capture_filter(const char *ifname, const char *filter, gchar **err
         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
               get_extcap_dir());
 
-        argv[0] = EXTCAP_ARGUMENT_CAPTURE_FILTER;
-        argv[1] = (gchar*)filter;
-        argv[2] = EXTCAP_ARGUMENT_INTERFACE;
-        argv[3] = (gchar*)ifname;
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_CAPTURE_FILTER));
+        arguments = g_list_append(arguments, g_strdup(filter));
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_INTERFACE));
+        arguments = g_list_append(arguments, g_strdup(ifname));
 
         extcap_callback_info_t cb_info;
         cb_info.data = &status;
         cb_info.err_str = err_str;
         cb_info.ifname = ifname;
 
-        extcap_foreach(4, argv, cb_verify_filter, cb_info);
+        extcap_foreach(arguments, cb_verify_filter, cb_info, NULL);
+        g_list_free_full(arguments, g_free);
     }
 
     return status;
@@ -944,50 +1051,10 @@ extcap_has_toolbar(const char *ifname)
     return FALSE;
 }
 
-/* taken from capchild/capture_sync.c */
-static gboolean pipe_data_available(int pipe_fd)
-{
-#ifdef _WIN32 /* PeekNamedPipe */
-    HANDLE hPipe = (HANDLE) _get_osfhandle(pipe_fd);
-    DWORD bytes_avail;
-
-    if (hPipe == INVALID_HANDLE_VALUE)
-    {
-        return FALSE;
-    }
-
-    if (! PeekNamedPipe(hPipe, NULL, 0, NULL, &bytes_avail, NULL))
-    {
-        return FALSE;
-    }
-
-    if (bytes_avail > 0)
-    {
-        return TRUE;
-    }
-    return FALSE;
-#else /* select */
-    fd_set rfds;
-    struct timeval timeout;
-
-    FD_ZERO(&rfds);
-    FD_SET(pipe_fd, &rfds);
-    timeout.tv_sec = 0;
-    timeout.tv_usec = 0;
-
-    if (select(pipe_fd + 1, &rfds, NULL, NULL, &timeout) > 0)
-    {
-        return TRUE;
-    }
-
-    return FALSE;
-#endif
-}
-
 void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
 {
     interface_options *interface_opts;
-    extcap_userdata *userdata;
+    ws_pipe_t *pipedata;
     guint icnt = 0;
     gboolean overwrite_exitcode;
     gchar *buffer;
@@ -1061,24 +1128,17 @@ void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
               "Extcap [%s] - Closing spawned PID: %d", interface_opts->name,
               interface_opts->extcap_pid);
 
-        userdata = (extcap_userdata *) interface_opts->extcap_userdata;
-        if (userdata)
+        pipedata = (ws_pipe_t *) interface_opts->extcap_pipedata;
+        if (pipedata)
         {
-            if (userdata->extcap_stderr_rd > 0 && pipe_data_available(userdata->extcap_stderr_rd))
+            if (pipedata->stderr_fd > 0 && ws_pipe_data_available(pipedata->stderr_fd))
             {
-                buffer = (gchar *)g_malloc0(sizeof(gchar) * STDERR_BUFFER_SIZE + 1);
-#ifdef _WIN32
-                win32_readfrompipe((HANDLE)_get_osfhandle(userdata->extcap_stderr_rd), STDERR_BUFFER_SIZE, buffer);
-#else
-                if (read(userdata->extcap_stderr_rd, buffer, sizeof(gchar) * STDERR_BUFFER_SIZE) <= 0)
-                {
-                    buffer[0] = '\0';
-                }
-#endif
+                buffer = (gchar *)g_malloc0(STDERR_BUFFER_SIZE + 1);
+                ws_read_string_from_pipe(ws_get_pipe_handle(pipedata->stderr_fd), buffer, STDERR_BUFFER_SIZE + 1);
                 if (strlen(buffer) > 0)
                 {
-                    userdata->extcap_stderr = g_strdup_printf("%s", buffer);
-                    userdata->exitcode = 1;
+                    pipedata->stderr_msg = g_strdup_printf("%s", buffer);
+                    pipedata->exitcode = 1;
                 }
                 g_free(buffer);
             }
@@ -1087,37 +1147,37 @@ void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
             /* Final child watch may not have been called */
             if (interface_opts->extcap_child_watch != 0)
             {
-                extcap_child_watch_cb(userdata->pid, 0, capture_opts);
+                extcap_child_watch_cb(pipedata->pid, 0, capture_opts);
                 /* it will have changed in extcap_child_watch_cb */
                 interface_opts = &g_array_index(capture_opts->ifaces, interface_options,
                                                icnt);
             }
 #endif
 
-            if (userdata->extcap_stderr != NULL)
+            if (pipedata->stderr_msg != NULL)
             {
                 overwrite_exitcode = TRUE;
             }
 
-            if (overwrite_exitcode || userdata->exitcode != 0)
+            if (overwrite_exitcode || pipedata->exitcode != 0)
             {
-                if (userdata->extcap_stderr != 0)
+                if (pipedata->stderr_msg != 0)
                 {
                     if (*errormsg == NULL)
                     {
-                        *errormsg = g_strdup_printf("Error by extcap pipe: %s", userdata->extcap_stderr);
+                        *errormsg = g_strdup_printf("Error by extcap pipe: %s", pipedata->stderr_msg);
                     }
                     else
                     {
-                        gchar *temp = g_strconcat(*errormsg, "\nError by extcap pipe: " , userdata->extcap_stderr, NULL);
+                        gchar *temp = g_strconcat(*errormsg, "\nError by extcap pipe: " , pipedata->stderr_msg, NULL);
                         g_free(*errormsg);
                         *errormsg = temp;
                     }
-                    g_free(userdata->extcap_stderr);
+                    g_free(pipedata->stderr_msg);
                 }
 
-                userdata->extcap_stderr = NULL;
-                userdata->exitcode = 0;
+                pipedata->stderr_msg = NULL;
+                pipedata->exitcode = 0;
             }
         }
 
@@ -1127,16 +1187,16 @@ void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
             interface_opts->extcap_child_watch = 0;
         }
 
-        if (interface_opts->extcap_pid != INVALID_EXTCAP_PID)
+        if (interface_opts->extcap_pid != WS_INVALID_PID)
         {
 #ifdef _WIN32
             TerminateProcess(interface_opts->extcap_pid, 0);
 #endif
             g_spawn_close_pid(interface_opts->extcap_pid);
-            interface_opts->extcap_pid = INVALID_EXTCAP_PID;
+            interface_opts->extcap_pid = WS_INVALID_PID;
 
-            g_free(interface_opts->extcap_userdata);
-            interface_opts->extcap_userdata = NULL;
+            g_free(interface_opts->extcap_pipedata);
+            interface_opts->extcap_pipedata = NULL;
         }
     }
 }
@@ -1165,7 +1225,7 @@ void extcap_child_watch_cb(GPid pid, gint status, gpointer user_data)
 {
     guint i;
     interface_options *interface_opts;
-    extcap_userdata *userdata = NULL;
+    ws_pipe_t *pipedata = NULL;
     capture_options *capture_opts = (capture_options *)(user_data);
 
     if (capture_opts == NULL || capture_opts->ifaces == NULL || capture_opts->ifaces->len == 0)
@@ -1182,32 +1242,32 @@ void extcap_child_watch_cb(GPid pid, gint status, gpointer user_data)
         interface_opts = &g_array_index(capture_opts->ifaces, interface_options, i);
         if (interface_opts->extcap_pid == pid)
         {
-            userdata = (extcap_userdata *)interface_opts->extcap_userdata;
-            if (userdata != NULL)
+            pipedata = (ws_pipe_t *)interface_opts->extcap_pipedata;
+            if (pipedata != NULL)
             {
-                interface_opts->extcap_pid = INVALID_EXTCAP_PID;
-                userdata->exitcode = 0;
+                interface_opts->extcap_pid = WS_INVALID_PID;
+                pipedata->exitcode = 0;
 #ifndef _WIN32
                 if (WIFEXITED(status))
                 {
                     if (WEXITSTATUS(status) != 0)
                     {
-                        userdata->exitcode = WEXITSTATUS(status);
+                        pipedata->exitcode = WEXITSTATUS(status);
                     }
                 }
                 else
                 {
-                    userdata->exitcode = G_SPAWN_ERROR_FAILED;
+                    pipedata->exitcode = G_SPAWN_ERROR_FAILED;
                 }
 #else
                 if (status != 0)
                 {
-                    userdata->exitcode = status;
+                    pipedata->exitcode = status;
                 }
 #endif
-                if (status == 0 && userdata->extcap_stderr != NULL)
+                if (status == 0 && pipedata->stderr_msg != NULL)
                 {
-                    userdata->exitcode = 1;
+                    pipedata->exitcode = 1;
                 }
             }
             g_source_remove(interface_opts->extcap_child_watch);
@@ -1318,6 +1378,11 @@ GPtrArray *extcap_prepare_arguments(interface_options *interface_opts)
     return result;
 }
 
+static void ptr_array_free(gpointer data, gpointer user_data _U_)
+{
+    g_free(data);
+}
+
 /* call mkfifo for each extcap,
  * returns FALSE if there's an error creating a FIFO */
 gboolean
@@ -1325,12 +1390,12 @@ extcap_init_interfaces(capture_options *capture_opts)
 {
     guint i;
     interface_options *interface_opts;
-    extcap_userdata *userdata;
+    ws_pipe_t *pipedata;
 
     for (i = 0; i < capture_opts->ifaces->len; i++)
     {
         GPtrArray *args = NULL;
-        GPid pid = INVALID_EXTCAP_PID;
+        GPid pid = WS_INVALID_PID;
 
         interface_opts = &g_array_index(capture_opts->ifaces, interface_options, i);
 
@@ -1344,12 +1409,12 @@ extcap_init_interfaces(capture_options *capture_opts)
         if (extcap_has_toolbar(interface_opts->name))
         {
             extcap_create_pipe(interface_opts->name, &interface_opts->extcap_control_in,
-                               EXTCAP_CONTROL_IN_PREFIX, FALSE);
+                               EXTCAP_CONTROL_IN_PREFIX);
 #ifdef _WIN32
             interface_opts->extcap_control_in_h = pipe_h;
 #endif
             extcap_create_pipe(interface_opts->name, &interface_opts->extcap_control_out,
-                               EXTCAP_CONTROL_OUT_PREFIX, FALSE);
+                               EXTCAP_CONTROL_OUT_PREFIX);
 #ifdef _WIN32
             interface_opts->extcap_control_out_h = pipe_h;
 #endif
@@ -1357,7 +1422,7 @@ extcap_init_interfaces(capture_options *capture_opts)
 
         /* create pipe for fifo */
         if (!extcap_create_pipe(interface_opts->name, &interface_opts->extcap_fifo,
-                                EXTCAP_PIPE_PREFIX, TRUE))
+                                EXTCAP_PIPE_PREFIX))
         {
             return FALSE;
         }
@@ -1368,19 +1433,20 @@ extcap_init_interfaces(capture_options *capture_opts)
         /* Create extcap call */
         args = extcap_prepare_arguments(interface_opts);
 
-        userdata = g_new0(extcap_userdata, 1);
+        pipedata = g_new0(ws_pipe_t, 1);
 
-        pid = extcap_spawn_async(userdata, args);
+        pid = ws_pipe_spawn_async(pipedata, args);
 
-        g_ptr_array_foreach(args, (GFunc)g_free, NULL);
+        g_ptr_array_foreach(args, ptr_array_free, NULL);
         g_ptr_array_free(args, TRUE);
 
-        if (pid == INVALID_EXTCAP_PID)
+        if (pid == WS_INVALID_PID)
         {
-            g_free(userdata);
+            g_free(pipedata);
             continue;
         }
 
+        ws_close(pipedata->stdin_fd);
         interface_opts->extcap_pid = pid;
 
         interface_opts->extcap_child_watch =
@@ -1393,10 +1459,8 @@ extcap_init_interfaces(capture_options *capture_opts)
          * connect to named pipe (including user interaction).
          * Wait on multiple object in case of extcap termination
          * without opening pipe.
-         *
-         * Minimum supported version of Windows: XP / Server 2003.
          */
-        if (pid != INVALID_EXTCAP_PID)
+        if (pid != WS_INVALID_PID)
         {
             HANDLE pipe_handles[3];
             int num_pipe_handles = 1;
@@ -1409,19 +1473,19 @@ extcap_init_interfaces(capture_options *capture_opts)
                 num_pipe_handles += 2;
              }
 
-            extcap_wait_for_pipe(pipe_handles, num_pipe_handles, pid);
+            ws_pipe_wait_for_pipe(pipe_handles, num_pipe_handles, pid);
         }
 #endif
 
-        interface_opts->extcap_userdata = (gpointer) userdata;
+        interface_opts->extcap_pipedata = (gpointer) pipedata;
     }
 
     return TRUE;
 }
 
-gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe_prefix, gboolean byte_mode _U_)
-{
 #ifdef _WIN32
+gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe_prefix)
+{
     gchar timestr[ 14 + 1 ];
     time_t current_time;
     gchar *pipename = NULL;
@@ -1446,7 +1510,7 @@ gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe
     pipe_h = CreateNamedPipe(
                  utf_8to16(pipename),
                  PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
-                 byte_mode ? PIPE_TYPE_BYTE : PIPE_TYPE_MESSAGE | byte_mode ? PIPE_READMODE_BYTE : PIPE_READMODE_MESSAGE | PIPE_WAIT,
+                 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
                  1, 65536, 65536,
                  300,
                  &security);
@@ -1462,7 +1526,12 @@ gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe
         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "\nWireshark Created pipe =>(%s)", pipename);
         *fifo = g_strdup(pipename);
     }
+
+    return TRUE;
+}
 #else
+gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe_prefix)
+{
     gchar *temp_name = NULL;
     int fd = 0;
 
@@ -1488,10 +1557,10 @@ gboolean extcap_create_pipe(const gchar *ifname, gchar **fifo, const gchar *pipe
     {
         *fifo = g_strdup(temp_name);
     }
-#endif
 
     return TRUE;
 }
+#endif
 
 /************* EXTCAP LOAD INTERFACE LIST ***************
  *
@@ -1520,6 +1589,9 @@ extcap_ensure_interface(const gchar * toolname, gboolean create_if_nonexist)
 {
     extcap_info * element = 0;
 
+    if ( prefs.capture_no_extcap )
+        return NULL;
+
     if ( ! toolname )
         return element;
 
@@ -1576,12 +1648,6 @@ static gboolean cb_load_interfaces(extcap_callback_info_t cb_info)
     /* Load interfaces from utility */
     interfaces = extcap_parse_interfaces(cb_info.output, &control_items);
 
-    if (control_items)
-    {
-        toolbar_entry = g_new0(iface_toolbar, 1);
-        toolbar_entry->controls = control_items;
-    }
-
     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Loading interface list for %s ", cb_info.extcap);
 
     /* Seems, that there where no interfaces to be loaded */
@@ -1608,6 +1674,12 @@ static gboolean cb_load_interfaces(extcap_callback_info_t cb_info)
         return FALSE;
     }
 
+    if (control_items)
+    {
+        toolbar_entry = g_new0(iface_toolbar, 1);
+        toolbar_entry->controls = control_items;
+    }
+
     walker = interfaces;
     gchar* help = NULL;
     while (walker != NULL)
@@ -1704,8 +1776,10 @@ static gboolean cb_load_interfaces(extcap_callback_info_t cb_info)
 static void
 extcap_load_interface_list(void)
 {
-    gchar *argv;
-    gchar *error;
+    gchar *error = NULL;
+
+    if (prefs.capture_no_extcap)
+        return;
 
     if (_toolbars)
     {
@@ -1724,6 +1798,11 @@ extcap_load_interface_list(void)
 
     if (_loaded_interfaces == NULL)
     {
+        GList * arguments = NULL;
+        GList * fallback = NULL;
+        int major = 0;
+        int minor = 0;
+
         _loaded_interfaces = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, extcap_free_interface_info);
         /* Cleanup lookup table */
         if ( _tool_for_ifname )
@@ -1734,16 +1813,21 @@ extcap_load_interface_list(void)
             _tool_for_ifname = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
         }
 
-        argv = g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES);
+        arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES));
+        fallback = g_list_append(fallback, g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES));
+
+        get_ws_version_number(&major, &minor, NULL);
+        arguments = g_list_append(arguments, g_strdup_printf("%s=%d.%d", EXTCAP_ARGUMENT_VERSION, major, minor));
 
         extcap_callback_info_t cb_info;
         cb_info.data = NULL;
         cb_info.ifname = NULL;
         cb_info.err_str = &error;
 
-        extcap_foreach(1, &argv, cb_load_interfaces, cb_info);
+        extcap_foreach(arguments, cb_load_interfaces, cb_info, fallback);
 
-        g_free(argv);
+        g_list_free_full(fallback, g_free);
+        g_list_free_full(arguments, g_free);
     }
 }