forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
This reverts commit 137d45f52c
.
Don't. Make. The. Argument. To. Your. Extcap. Program. Specific.
Options. Optional. (Unless they're Boolean, in which case we never
pass an argument - we just pass the option if it's true and don't
pass it if it's false.)
Change-Id: I11e4ecaa196fd94c493d51e1f73e90267e1d9b1d
Reviewed-on: https://code.wireshark.org/review/28866
Reviewed-by: Guy Harris <guy@alum.mit.edu>
1846 lines
55 KiB
C
1846 lines
55 KiB
C
/* extcap.c
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*
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* Routines for extcap external capture
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* Copyright 2013, Mike Ryan <mikeryan@lacklustre.net>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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#include <windows.h>
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#include <process.h>
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#include <time.h>
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#else
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/* Include for unlink */
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <glib.h>
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#include <log.h>
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#include <epan/prefs.h>
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#include "ui/iface_toolbar.h"
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#include <wsutil/file_util.h>
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#include <wsutil/filesystem.h>
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#include <wsutil/ws_pipe.h>
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#include <wsutil/tempfile.h>
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#include "capture_opts.h"
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#include "extcap.h"
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#include "extcap_parser.h"
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#include "version_info.h"
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#ifdef _WIN32
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static HANDLE pipe_h = INVALID_HANDLE_VALUE;
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#endif
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static void extcap_child_watch_cb(GPid pid, gint status, gpointer user_data);
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/* internal container, for all the extcap executables that have been found.
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* Will be resetted if extcap_clear_interfaces() is being explicitly called
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* and is being used for printing information about all extcap interfaces found,
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* as well as storing all sub-interfaces
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*/
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static GHashTable * _loaded_interfaces = NULL;
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/* Internal container, which maps each ifname to the tool providing it, for faster
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* lookup. The key and string value are owned by this table.
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*/
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static GHashTable * _tool_for_ifname = NULL;
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/* internal container, for all the extcap executables that have been found
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* and that provides a toolbar with controls to be added to a Interface Toolbar
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*/
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static GHashTable *_toolbars = NULL;
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/* internal container, to map preference names to pointers that hold preference
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* values. These ensure that preferences can survive extcap if garbage
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* collection, and does not lead to dangling pointers in the prefs subsystem.
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*/
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static GHashTable *extcap_prefs_dynamic_vals = NULL;
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typedef struct _extcap_callback_info_t
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{
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const gchar * extcap;
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const gchar * ifname;
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gchar * output;
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void * data;
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gchar ** err_str;
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} extcap_callback_info_t;
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/* Callback definition for extcap_foreach */
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typedef gboolean(*extcap_cb_t)(extcap_callback_info_t info_structure);
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static void extcap_load_interface_list(void);
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GHashTable *
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extcap_loaded_interfaces(void)
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{
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if (prefs.capture_no_extcap)
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return NULL;
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if ( !_loaded_interfaces || g_hash_table_size(_loaded_interfaces) == 0 )
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extcap_load_interface_list();
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return _loaded_interfaces;
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}
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void
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extcap_clear_interfaces(void)
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{
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if ( _loaded_interfaces )
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g_hash_table_destroy(_loaded_interfaces);
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_loaded_interfaces = NULL;
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if ( _tool_for_ifname )
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g_hash_table_destroy(_tool_for_ifname);
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_tool_for_ifname = NULL;
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}
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guint extcap_count(void)
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{
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const char *dirname = get_extcap_dir();
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GDir *dir;
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guint count;
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count = 0;
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if ((dir = g_dir_open(dirname, 0, NULL)) != NULL)
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{
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GString *extcap_path = NULL;
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const gchar *file;
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extcap_path = g_string_new("");
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while ((file = g_dir_read_name(dir)) != NULL)
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{
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/* full path to extcap binary */
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g_string_printf(extcap_path, "%s" G_DIR_SEPARATOR_S "%s", dirname, file);
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/* treat anything executable as an extcap binary */
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if (g_file_test(extcap_path->str, G_FILE_TEST_IS_REGULAR) &&
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g_file_test(extcap_path->str, G_FILE_TEST_IS_EXECUTABLE))
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{
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count++;
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}
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}
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g_dir_close(dir);
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g_string_free(extcap_path, TRUE);
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}
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return count;
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}
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static gboolean
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extcap_if_exists(const gchar *ifname)
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{
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if (!ifname || !_tool_for_ifname)
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{
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return FALSE;
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}
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if (g_hash_table_lookup(_tool_for_ifname, ifname))
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{
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return TRUE;
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}
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return FALSE;
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}
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static extcap_interface *
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extcap_find_interface_for_ifname(const gchar *ifname)
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{
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extcap_interface * result = NULL;
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if ( !ifname || ! _tool_for_ifname || ! _loaded_interfaces )
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return result;
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gchar * extcap_util = (gchar *)g_hash_table_lookup(_tool_for_ifname, ifname);
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if ( ! extcap_util )
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return result;
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extcap_info * element = (extcap_info *)g_hash_table_lookup(_loaded_interfaces, extcap_util);
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if ( ! element )
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return result;
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GList * walker = element->interfaces;
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while ( walker && walker->data && ! result )
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{
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extcap_interface * interface = (extcap_interface *)walker->data;
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if ( g_strcmp0(interface->call, ifname) == 0 )
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{
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result = interface;
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break;
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}
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walker = g_list_next ( walker );
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}
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return result;
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}
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static void
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extcap_free_toolbar_value(iface_toolbar_value *value)
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{
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if (!value)
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{
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return;
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}
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g_free(value->value);
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g_free(value->display);
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g_free(value);
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}
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static void
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extcap_free_toolbar_control(iface_toolbar_control *control)
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{
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if (!control)
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{
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return;
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}
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g_free(control->display);
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g_free(control->validation);
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g_free(control->tooltip);
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if (control->ctrl_type == INTERFACE_TYPE_STRING) {
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g_free(control->default_value.string);
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}
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g_list_free_full(control->values, (GDestroyNotify)extcap_free_toolbar_value);
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g_free(control);
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}
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static void
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extcap_free_toolbar(gpointer data)
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{
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if (!data)
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{
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return;
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}
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iface_toolbar *toolbar = (iface_toolbar *)data;
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g_free(toolbar->menu_title);
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g_free(toolbar->help);
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g_list_free_full(toolbar->ifnames, g_free);
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g_list_free_full(toolbar->controls, (GDestroyNotify)extcap_free_toolbar_control);
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g_free(toolbar);
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}
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static gboolean
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extcap_if_exists_for_extcap(const gchar *ifname, const gchar *extcap)
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{
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extcap_interface *entry = extcap_find_interface_for_ifname(ifname);
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if (entry && strcmp(entry->extcap_path, extcap) == 0)
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{
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return TRUE;
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}
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return FALSE;
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}
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static gchar *
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extcap_if_executable(const gchar *ifname)
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{
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extcap_interface *interface = extcap_find_interface_for_ifname(ifname);
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return interface != NULL ? interface->extcap_path : NULL;
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}
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static void
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extcap_iface_toolbar_add(const gchar *extcap, iface_toolbar *toolbar_entry)
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{
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char *toolname;
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if (!extcap || !toolbar_entry)
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{
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return;
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}
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toolname = g_path_get_basename(extcap);
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if (!g_hash_table_lookup(_toolbars, toolname))
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{
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g_hash_table_insert(_toolbars, g_strdup(toolname), toolbar_entry);
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}
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g_free(toolname);
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}
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static gchar **
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extcap_convert_arguments_to_array(GList * arguments)
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{
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gchar ** result = NULL;
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if ( arguments )
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{
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GList * walker = g_list_first(arguments);
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int cnt = 0;
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result = (gchar **) g_malloc0(sizeof(gchar *) * (g_list_length(arguments)));
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while(walker)
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{
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result[cnt] = g_strdup((const gchar *)walker->data);
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walker = g_list_next(walker);
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cnt++;
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}
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}
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return result;
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}
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static void extcap_free_array(gchar ** args, int argc)
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{
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int cnt = 0;
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for ( cnt = 0; cnt < argc; cnt++ )
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g_free(args[cnt]);
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g_free(args);
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}
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/* Note: args does not need to be NULL-terminated. */
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static gboolean extcap_foreach(GList * arguments,
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extcap_cb_t cb, extcap_callback_info_t cb_info, GList * fallback_arguments)
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{
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GDir *dir;
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gboolean keep_going;
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const char *dirname = get_extcap_dir();
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keep_going = TRUE;
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if (arguments && (dir = g_dir_open(dirname, 0, NULL)) != NULL)
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{
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GString *extcap_path = NULL;
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const gchar *file;
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gchar ** args = extcap_convert_arguments_to_array(arguments);
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int cnt = g_list_length(arguments);
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extcap_path = g_string_new("");
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while (keep_going && (file = g_dir_read_name(dir)) != NULL)
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{
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gchar *command_output = NULL;
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/* full path to extcap binary */
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g_string_printf(extcap_path, "%s" G_DIR_SEPARATOR_S "%s", dirname, file);
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/* treat anything executable as an extcap binary */
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if (g_file_test(extcap_path->str, G_FILE_TEST_IS_REGULAR) &&
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g_file_test(extcap_path->str, G_FILE_TEST_IS_EXECUTABLE))
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{
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if (extcap_if_exists(cb_info.ifname) && !extcap_if_exists_for_extcap(cb_info.ifname, extcap_path->str))
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{
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continue;
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}
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if (ws_pipe_spawn_sync((gchar *) dirname, extcap_path->str, cnt, args, &command_output))
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{
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cb_info.output = command_output;
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cb_info.extcap = extcap_path->str;
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keep_going = cb(cb_info);
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}
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else if ( fallback_arguments )
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{
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gchar ** fb_args = extcap_convert_arguments_to_array(fallback_arguments);
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if (ws_pipe_spawn_sync((gchar *) dirname, extcap_path->str, g_list_length(fallback_arguments), fb_args, &command_output))
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{
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cb_info.output = command_output;
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cb_info.extcap = extcap_path->str;
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keep_going = cb(cb_info);
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}
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}
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g_free(command_output);
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}
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}
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extcap_free_array(args, cnt);
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g_dir_close(dir);
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g_string_free(extcap_path, TRUE);
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}
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return keep_going;
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}
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static void extcap_free_dlt(gpointer d, gpointer user_data _U_)
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{
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if (d == NULL)
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{
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return;
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}
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g_free(((extcap_dlt *)d)->name);
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g_free(((extcap_dlt *)d)->display);
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g_free(d);
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}
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static void extcap_free_dlts(GList *dlts)
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{
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g_list_foreach(dlts, extcap_free_dlt, NULL);
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g_list_free(dlts);
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}
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static gboolean cb_dlt(extcap_callback_info_t cb_info)
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{
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GList *dlts = NULL, *temp = NULL;
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if_capabilities_t *caps;
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GList *linktype_list = NULL;
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data_link_info_t *data_link_info;
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extcap_dlt *dlt_item;
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dlts = extcap_parse_dlts(cb_info.output);
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temp = dlts;
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", cb_info.extcap);
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/*
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* Allocate the interface capabilities structure.
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*/
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caps = (if_capabilities_t *) g_malloc(sizeof * caps);
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caps->can_set_rfmon = FALSE;
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caps->timestamp_types = NULL;
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while (dlts)
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{
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dlt_item = (extcap_dlt *)dlts->data;
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if (dlt_item)
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{
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
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" DLT %d name=\"%s\" display=\"%s\" ", dlt_item->number,
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dlt_item->name, dlt_item->display);
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data_link_info = g_new(data_link_info_t, 1);
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data_link_info->dlt = dlt_item->number;
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data_link_info->name = g_strdup(dlt_item->name);
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data_link_info->description = g_strdup(dlt_item->display);
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linktype_list = g_list_append(linktype_list, data_link_info);
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}
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dlts = g_list_next(dlts);
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}
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/* Check to see if we built a list */
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if (linktype_list != NULL && cb_info.data != NULL)
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{
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caps->data_link_types = linktype_list;
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*(if_capabilities_t **) cb_info.data = caps;
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}
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else
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{
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if (cb_info.err_str)
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{
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " returned no DLTs");
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*(cb_info.err_str) = g_strdup("Extcap returned no DLTs");
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}
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g_free(caps);
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}
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extcap_free_dlts(temp);
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return FALSE;
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}
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if_capabilities_t *
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extcap_get_if_dlts(const gchar *ifname, char **err_str)
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{
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GList * arguments = NULL;
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if_capabilities_t *caps = NULL;
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if (err_str != NULL)
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{
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*err_str = NULL;
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}
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if (extcap_if_exists(ifname))
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{
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arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_LIST_DLTS));
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arguments = g_list_append(arguments, g_strdup(EXTCAP_ARGUMENT_INTERFACE));
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arguments = g_list_append(arguments, g_strdup(ifname));
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extcap_callback_info_t cb_info;
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cb_info.data = ∩︀
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cb_info.err_str = err_str;
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cb_info.ifname = ifname;
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extcap_foreach(arguments, cb_dlt, cb_info, NULL);
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g_list_free_full(arguments, g_free);
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}
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return caps;
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}
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static void extcap_free_interface(gpointer i)
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{
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extcap_interface *interface = (extcap_interface *)i;
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if (i == NULL)
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{
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return;
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}
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g_free(interface->call);
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g_free(interface->display);
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g_free(interface->version);
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g_free(interface->help);
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g_free(interface->extcap_path);
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g_free(interface);
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}
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static void extcap_free_interfaces(GList *interfaces)
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{
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if (interfaces == NULL)
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{
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return;
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}
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g_list_free_full(interfaces, extcap_free_interface);
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}
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static gint
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if_info_compare(gconstpointer a, gconstpointer b)
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{
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gint comp = 0;
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const if_info_t *if_a = (const if_info_t *)a;
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const if_info_t *if_b = (const if_info_t *)b;
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if ((comp = g_strcmp0(if_a->name, if_b->name)) == 0)
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{
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return g_strcmp0(if_a->friendly_name, if_b->friendly_name);
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}
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return comp;
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}
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gchar *
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extcap_get_help_for_ifname(const char *ifname)
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{
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extcap_interface *interface = extcap_find_interface_for_ifname(ifname);
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return interface != NULL ? interface->help : NULL;
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}
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GList *
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append_extcap_interface_list(GList *list, char **err_str _U_)
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{
|
|
GList *interface_list = NULL;
|
|
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();
|
|
|
|
ifutilkeys_head = g_hash_table_get_keys(_loaded_interfaces);
|
|
ifutilkeys = ifutilkeys_head;
|
|
while ( ifutilkeys && ifutilkeys->data )
|
|
{
|
|
extcap_info * extinfo =
|
|
(extcap_info *) g_hash_table_lookup(_loaded_interfaces, (gchar *)ifutilkeys->data);
|
|
GList * walker = extinfo->interfaces;
|
|
while ( walker && walker->data )
|
|
{
|
|
interface_list = g_list_append(interface_list, walker->data);
|
|
walker = g_list_next(walker);
|
|
}
|
|
|
|
ifutilkeys = g_list_next(ifutilkeys);
|
|
}
|
|
g_list_free(ifutilkeys_head);
|
|
|
|
/* Sort that list */
|
|
interface_list = g_list_sort(interface_list, if_info_compare);
|
|
|
|
/* Append the interfaces in that list to the list we're handed. */
|
|
while (interface_list != NULL)
|
|
{
|
|
GList *entry = g_list_first(interface_list);
|
|
data = (extcap_interface *)entry->data;
|
|
interface_list = g_list_delete_link(interface_list, entry);
|
|
|
|
if_info_t * if_info = g_new0(if_info_t, 1);
|
|
if_info->name = g_strdup(data->call);
|
|
if_info->friendly_name = g_strdup(data->display);
|
|
|
|
if_info->type = IF_EXTCAP;
|
|
|
|
if_info->extcap = g_strdup(data->extcap_path);
|
|
|
|
list = g_list_append(list, if_info);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
static void
|
|
extcap_register_preferences_callback(gpointer key, gpointer value _U_, gpointer user_data _U_)
|
|
{
|
|
GList *arguments;
|
|
|
|
arguments = extcap_get_if_configuration((gchar *)key);
|
|
/* Memory for prefs are external to an interface, they are part of
|
|
* extcap core, so the parsed arguments can be freed. */
|
|
extcap_free_if_configuration(arguments, TRUE);
|
|
}
|
|
|
|
void extcap_register_preferences(void)
|
|
{
|
|
if (prefs.capture_no_extcap)
|
|
return;
|
|
|
|
module_t *dev_module = prefs_find_module("extcap");
|
|
|
|
if (!dev_module)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ( !_loaded_interfaces || g_hash_table_size(_loaded_interfaces) == 0 )
|
|
extcap_load_interface_list();
|
|
|
|
|
|
g_hash_table_foreach(_tool_for_ifname, extcap_register_preferences_callback, NULL);
|
|
}
|
|
|
|
/**
|
|
* Releases the dynamic preference value pointers. Must not be called before
|
|
* prefs_cleanup since these pointers could still be in use.
|
|
*/
|
|
void extcap_cleanup(void)
|
|
{
|
|
if (extcap_prefs_dynamic_vals)
|
|
g_hash_table_destroy(extcap_prefs_dynamic_vals);
|
|
|
|
if (_loaded_interfaces)
|
|
g_hash_table_destroy(_loaded_interfaces);
|
|
|
|
if (_tool_for_ifname)
|
|
g_hash_table_destroy(_tool_for_ifname);
|
|
}
|
|
|
|
/**
|
|
* Obtains a pointer which can store a value for the given preference name.
|
|
* The preference name that can be passed to the prefs API is stored into
|
|
* 'prefs_name'.
|
|
*
|
|
* Extcap interfaces (and their preferences) are dynamic, they can be created
|
|
* and destroyed at will. Thus their data structures are insufficient to pass to
|
|
* the preferences APIs which require pointers which are valid until the
|
|
* preferences are removed (at exit).
|
|
*/
|
|
static gchar **extcap_prefs_dynamic_valptr(const char *name, char **pref_name)
|
|
{
|
|
gchar **valp;
|
|
if (!extcap_prefs_dynamic_vals)
|
|
{
|
|
/* Initialize table only as needed, most preferences are not dynamic */
|
|
extcap_prefs_dynamic_vals = g_hash_table_new_full(g_str_hash, g_str_equal,
|
|
g_free, g_free);
|
|
}
|
|
if (!g_hash_table_lookup_extended(extcap_prefs_dynamic_vals, name,
|
|
(gpointer *)pref_name, (gpointer *)&valp))
|
|
{
|
|
/* New dynamic pref, allocate, initialize and store. */
|
|
valp = g_new0(gchar *, 1);
|
|
*pref_name = g_strdup(name);
|
|
g_hash_table_insert(extcap_prefs_dynamic_vals, *pref_name, valp);
|
|
}
|
|
return valp;
|
|
}
|
|
|
|
void extcap_free_if_configuration(GList *list, gboolean free_args)
|
|
{
|
|
GList *elem, *sl;
|
|
|
|
for (elem = g_list_first(list); elem; elem = elem->next)
|
|
{
|
|
if (elem->data != NULL)
|
|
{
|
|
sl = g_list_first((GList *)elem->data);
|
|
if (free_args)
|
|
{
|
|
extcap_free_arg_list(sl);
|
|
}
|
|
else
|
|
{
|
|
g_list_free(sl);
|
|
}
|
|
}
|
|
}
|
|
g_list_free(list);
|
|
}
|
|
|
|
struct preference *
|
|
extcap_pref_for_argument(const gchar *ifname, struct _extcap_arg *arg)
|
|
{
|
|
struct preference *pref = NULL;
|
|
|
|
GRegex *regex_name = g_regex_new("[-]+", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL);
|
|
GRegex *regex_ifname = g_regex_new("(?![a-zA-Z1-9_]).", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL);
|
|
if (regex_name && regex_ifname)
|
|
{
|
|
if (prefs_find_module("extcap"))
|
|
{
|
|
gchar *pref_name = g_regex_replace(regex_name, arg->call, strlen(arg->call), 0, "", (GRegexMatchFlags) 0, NULL);
|
|
gchar *ifname_underscore = g_regex_replace(regex_ifname, ifname, strlen(ifname), 0, "_", (GRegexMatchFlags) 0, NULL);
|
|
gchar *ifname_lowercase = g_ascii_strdown(ifname_underscore, -1);
|
|
gchar *pref_ifname = g_strconcat(ifname_lowercase, ".", pref_name, NULL);
|
|
|
|
pref = prefs_find_preference(prefs_find_module("extcap"), pref_ifname);
|
|
|
|
g_free(pref_name);
|
|
g_free(ifname_underscore);
|
|
g_free(ifname_lowercase);
|
|
g_free(pref_ifname);
|
|
}
|
|
}
|
|
if (regex_name)
|
|
{
|
|
g_regex_unref(regex_name);
|
|
}
|
|
if (regex_ifname)
|
|
{
|
|
g_regex_unref(regex_ifname);
|
|
}
|
|
|
|
return pref;
|
|
}
|
|
|
|
static gboolean cb_preference(extcap_callback_info_t cb_info)
|
|
{
|
|
GList *arguments = NULL;
|
|
GList **il = (GList **) cb_info.data;
|
|
module_t *dev_module = NULL;
|
|
|
|
arguments = extcap_parse_args(cb_info.output);
|
|
|
|
dev_module = prefs_find_module("extcap");
|
|
|
|
if (dev_module)
|
|
{
|
|
GList *walker = arguments;
|
|
|
|
GRegex *regex_name = g_regex_new("[-]+", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL);
|
|
GRegex *regex_ifname = g_regex_new("(?![a-zA-Z1-9_]).", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL);
|
|
if (regex_name && regex_ifname)
|
|
{
|
|
while (walker != NULL)
|
|
{
|
|
extcap_arg *arg = (extcap_arg *)walker->data;
|
|
arg->device_name = g_strdup(cb_info.ifname);
|
|
|
|
if (arg->save)
|
|
{
|
|
struct preference *pref = NULL;
|
|
|
|
gchar *pref_name = g_regex_replace(regex_name, arg->call, strlen(arg->call), 0, "", (GRegexMatchFlags) 0, NULL);
|
|
gchar *ifname_underscore = g_regex_replace(regex_ifname, cb_info.ifname, strlen(cb_info.ifname), 0, "_", (GRegexMatchFlags) 0, NULL);
|
|
gchar *ifname_lowercase = g_ascii_strdown(ifname_underscore, -1);
|
|
gchar *pref_ifname = g_strconcat(ifname_lowercase, ".", pref_name, NULL);
|
|
|
|
if ((pref = prefs_find_preference(dev_module, pref_ifname)) == NULL)
|
|
{
|
|
char *pref_name_for_prefs;
|
|
char *pref_title = wmem_strdup(wmem_epan_scope(), arg->display);
|
|
|
|
arg->pref_valptr = extcap_prefs_dynamic_valptr(pref_ifname, &pref_name_for_prefs);
|
|
/* Set an initial value if any (the string will be copied at registration) */
|
|
if (arg->default_complex)
|
|
{
|
|
*arg->pref_valptr = arg->default_complex->_val;
|
|
}
|
|
|
|
prefs_register_string_preference(dev_module, pref_name_for_prefs,
|
|
pref_title, pref_title, (const char **)arg->pref_valptr);
|
|
}
|
|
else
|
|
{
|
|
/* Been here before, restore stored value */
|
|
if (arg->pref_valptr == NULL)
|
|
{
|
|
arg->pref_valptr = (gchar**)g_hash_table_lookup(extcap_prefs_dynamic_vals, pref_ifname);
|
|
}
|
|
}
|
|
|
|
g_free(pref_name);
|
|
g_free(ifname_underscore);
|
|
g_free(ifname_lowercase);
|
|
g_free(pref_ifname);
|
|
}
|
|
|
|
walker = g_list_next(walker);
|
|
}
|
|
}
|
|
if (regex_name)
|
|
{
|
|
g_regex_unref(regex_name);
|
|
}
|
|
if (regex_ifname)
|
|
{
|
|
g_regex_unref(regex_ifname);
|
|
}
|
|
}
|
|
|
|
*il = g_list_append(*il, arguments);
|
|
|
|
/* By returning false, extcap_foreach will break on first found */
|
|
return TRUE;
|
|
}
|
|
|
|
GList *
|
|
extcap_get_if_configuration(const char *ifname)
|
|
{
|
|
GList * arguments = 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());
|
|
|
|
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(arguments, cb_preference, cb_info, NULL);
|
|
|
|
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 )
|
|
{
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* If is_required is FALSE: returns TRUE if the extcap interface has
|
|
* configurable options.
|
|
* If is_required is TRUE: returns TRUE when the extcap interface has
|
|
* configurable options that required modification. (For example, when an
|
|
* argument is required but empty.)
|
|
*/
|
|
gboolean
|
|
extcap_has_configuration(const char *ifname, gboolean is_required)
|
|
{
|
|
GList *arguments = 0;
|
|
GList *walker = 0, * item = 0;
|
|
|
|
gboolean found = FALSE;
|
|
|
|
arguments = extcap_get_if_configuration((const char *)(ifname));
|
|
walker = g_list_first(arguments);
|
|
|
|
while (walker != NULL && !found)
|
|
{
|
|
item = g_list_first((GList *)(walker->data));
|
|
while (item != NULL && !found)
|
|
{
|
|
if ((extcap_arg *)(item->data) != NULL)
|
|
{
|
|
extcap_arg *arg = (extcap_arg *)(item->data);
|
|
/* Should required options be present, or any kind of options */
|
|
if (!is_required)
|
|
{
|
|
found = TRUE;
|
|
}
|
|
else if (arg->is_required)
|
|
{
|
|
const gchar *stored = NULL;
|
|
const gchar *defval = NULL;
|
|
|
|
if (arg->pref_valptr != NULL)
|
|
{
|
|
stored = *arg->pref_valptr;
|
|
}
|
|
|
|
if (arg->default_complex != NULL && arg->default_complex->_val != NULL)
|
|
{
|
|
defval = arg->default_complex->_val;
|
|
}
|
|
|
|
if (arg->is_required)
|
|
{
|
|
/* If stored and defval is identical and the argument is required,
|
|
* configuration is needed */
|
|
if (defval && stored && g_strcmp0(stored, defval) == 0)
|
|
{
|
|
found = TRUE;
|
|
}
|
|
else if (!defval && (!stored || !*stored))
|
|
{
|
|
found = TRUE;
|
|
}
|
|
}
|
|
|
|
if (arg->arg_type == EXTCAP_ARG_FILESELECT)
|
|
{
|
|
if (arg->fileexists && !(file_exists(defval) || file_exists(stored)))
|
|
{
|
|
found = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
item = item->next;
|
|
}
|
|
walker = walker->next;
|
|
}
|
|
extcap_free_if_configuration(arguments, TRUE);
|
|
|
|
return found;
|
|
}
|
|
|
|
static gboolean cb_verify_filter(extcap_callback_info_t cb_info)
|
|
{
|
|
extcap_filter_status *status = (extcap_filter_status *)cb_info.data;
|
|
size_t output_size, i;
|
|
|
|
output_size = strlen(cb_info.output);
|
|
if (output_size == 0) {
|
|
*status = EXTCAP_FILTER_VALID;
|
|
} else {
|
|
*status = EXTCAP_FILTER_INVALID;
|
|
for (i = 0; i < output_size; i++) {
|
|
if (cb_info.output[i] == '\n' || cb_info.output[i] == '\r') {
|
|
cb_info.output[i] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
*cb_info.err_str = g_strdup(cb_info.output);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
extcap_filter_status
|
|
extcap_verify_capture_filter(const char *ifname, const char *filter, gchar **err_str)
|
|
{
|
|
GList * arguments = NULL;
|
|
extcap_filter_status status = EXTCAP_FILTER_UNKNOWN;
|
|
|
|
if (extcap_if_exists(ifname))
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
|
|
get_extcap_dir());
|
|
|
|
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(arguments, cb_verify_filter, cb_info, NULL);
|
|
g_list_free_full(arguments, g_free);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
gboolean
|
|
extcap_has_toolbar(const char *ifname)
|
|
{
|
|
if (!iface_toolbar_use())
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
GList *toolbar_list = g_hash_table_get_values (_toolbars);
|
|
for (GList *walker = toolbar_list; walker; walker = walker->next)
|
|
{
|
|
iface_toolbar *toolbar = (iface_toolbar *) walker->data;
|
|
if (g_list_find_custom(toolbar->ifnames, ifname, (GCompareFunc) strcmp))
|
|
{
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
|
|
{
|
|
interface_options *interface_opts;
|
|
ws_pipe_t *pipedata;
|
|
guint icnt = 0;
|
|
gboolean overwrite_exitcode;
|
|
gchar *buffer;
|
|
#define STDERR_BUFFER_SIZE 1024
|
|
|
|
for (icnt = 0; icnt < capture_opts->ifaces->len; icnt++)
|
|
{
|
|
interface_opts = &g_array_index(capture_opts->ifaces, interface_options,
|
|
icnt);
|
|
|
|
/* skip native interfaces */
|
|
if (interface_opts->if_type != IF_EXTCAP)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
overwrite_exitcode = FALSE;
|
|
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap [%s] - Cleaning up fifo: %s; PID: %d", interface_opts->name,
|
|
interface_opts->extcap_fifo, interface_opts->extcap_pid);
|
|
#ifdef _WIN32
|
|
if (interface_opts->extcap_pipe_h != INVALID_HANDLE_VALUE)
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap [%s] - Closing pipe", interface_opts->name);
|
|
FlushFileBuffers(interface_opts->extcap_pipe_h);
|
|
DisconnectNamedPipe(interface_opts->extcap_pipe_h);
|
|
CloseHandle(interface_opts->extcap_pipe_h);
|
|
interface_opts->extcap_pipe_h = INVALID_HANDLE_VALUE;
|
|
}
|
|
if (interface_opts->extcap_control_in_h != INVALID_HANDLE_VALUE)
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap [%s] - Closing control_in pipe", interface_opts->name);
|
|
FlushFileBuffers(interface_opts->extcap_control_in_h);
|
|
DisconnectNamedPipe(interface_opts->extcap_control_in_h);
|
|
CloseHandle(interface_opts->extcap_control_in_h);
|
|
interface_opts->extcap_control_in_h = INVALID_HANDLE_VALUE;
|
|
}
|
|
if (interface_opts->extcap_control_out_h != INVALID_HANDLE_VALUE)
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap [%s] - Closing control_out pipe", interface_opts->name);
|
|
FlushFileBuffers(interface_opts->extcap_control_out_h);
|
|
DisconnectNamedPipe(interface_opts->extcap_control_out_h);
|
|
CloseHandle(interface_opts->extcap_control_out_h);
|
|
interface_opts->extcap_control_out_h = INVALID_HANDLE_VALUE;
|
|
}
|
|
#else
|
|
if (interface_opts->extcap_fifo != NULL && file_exists(interface_opts->extcap_fifo))
|
|
{
|
|
/* the fifo will not be freed here, but with the other capture_opts in capture_sync */
|
|
ws_unlink(interface_opts->extcap_fifo);
|
|
interface_opts->extcap_fifo = NULL;
|
|
}
|
|
if (interface_opts->extcap_control_in && file_exists(interface_opts->extcap_control_in))
|
|
{
|
|
ws_unlink(interface_opts->extcap_control_in);
|
|
interface_opts->extcap_control_in = NULL;
|
|
}
|
|
if (interface_opts->extcap_control_out && file_exists(interface_opts->extcap_control_out))
|
|
{
|
|
ws_unlink(interface_opts->extcap_control_out);
|
|
interface_opts->extcap_control_out = NULL;
|
|
}
|
|
#endif
|
|
/* Maybe the client closed and removed fifo, but ws should check if
|
|
* pid should be closed */
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap [%s] - Closing spawned PID: %d", interface_opts->name,
|
|
interface_opts->extcap_pid);
|
|
|
|
pipedata = (ws_pipe_t *) interface_opts->extcap_pipedata;
|
|
if (pipedata)
|
|
{
|
|
if (pipedata->stderr_fd > 0 && ws_pipe_data_available(pipedata->stderr_fd))
|
|
{
|
|
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)
|
|
{
|
|
pipedata->stderr_msg = g_strdup_printf("%s", buffer);
|
|
pipedata->exitcode = 1;
|
|
}
|
|
g_free(buffer);
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
/* Final child watch may not have been called */
|
|
if (interface_opts->extcap_child_watch != 0)
|
|
{
|
|
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 (pipedata->stderr_msg != NULL)
|
|
{
|
|
overwrite_exitcode = TRUE;
|
|
}
|
|
|
|
if (overwrite_exitcode || pipedata->exitcode != 0)
|
|
{
|
|
if (pipedata->stderr_msg != 0)
|
|
{
|
|
if (*errormsg == NULL)
|
|
{
|
|
*errormsg = g_strdup_printf("Error by extcap pipe: %s", pipedata->stderr_msg);
|
|
}
|
|
else
|
|
{
|
|
gchar *temp = g_strconcat(*errormsg, "\nError by extcap pipe: " , pipedata->stderr_msg, NULL);
|
|
g_free(*errormsg);
|
|
*errormsg = temp;
|
|
}
|
|
g_free(pipedata->stderr_msg);
|
|
}
|
|
|
|
pipedata->stderr_msg = NULL;
|
|
pipedata->exitcode = 0;
|
|
}
|
|
}
|
|
|
|
if (interface_opts->extcap_child_watch > 0)
|
|
{
|
|
g_source_remove(interface_opts->extcap_child_watch);
|
|
interface_opts->extcap_child_watch = 0;
|
|
}
|
|
|
|
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 = WS_INVALID_PID;
|
|
|
|
g_free(interface_opts->extcap_pipedata);
|
|
interface_opts->extcap_pipedata = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
extcap_add_arg_and_remove_cb(gpointer key, gpointer value, gpointer data)
|
|
{
|
|
GPtrArray *args = (GPtrArray *)data;
|
|
|
|
if (key != NULL)
|
|
{
|
|
g_ptr_array_add(args, g_strdup((const gchar *)key));
|
|
|
|
if (value != NULL)
|
|
{
|
|
g_ptr_array_add(args, g_strdup((const gchar *)value));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
void extcap_child_watch_cb(GPid pid, gint status, gpointer user_data)
|
|
{
|
|
guint i;
|
|
interface_options *interface_opts;
|
|
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)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* Close handle to child process. */
|
|
g_spawn_close_pid(pid);
|
|
|
|
/* Update extcap_pid in interface options structure. */
|
|
for (i = 0; i < capture_opts->ifaces->len; i++)
|
|
{
|
|
interface_opts = &g_array_index(capture_opts->ifaces, interface_options, i);
|
|
if (interface_opts->extcap_pid == pid)
|
|
{
|
|
pipedata = (ws_pipe_t *)interface_opts->extcap_pipedata;
|
|
if (pipedata != NULL)
|
|
{
|
|
interface_opts->extcap_pid = WS_INVALID_PID;
|
|
pipedata->exitcode = 0;
|
|
#ifndef _WIN32
|
|
if (WIFEXITED(status))
|
|
{
|
|
if (WEXITSTATUS(status) != 0)
|
|
{
|
|
pipedata->exitcode = WEXITSTATUS(status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pipedata->exitcode = G_SPAWN_ERROR_FAILED;
|
|
}
|
|
#else
|
|
if (status != 0)
|
|
{
|
|
pipedata->exitcode = status;
|
|
}
|
|
#endif
|
|
if (status == 0 && pipedata->stderr_msg != NULL)
|
|
{
|
|
pipedata->exitcode = 1;
|
|
}
|
|
}
|
|
g_source_remove(interface_opts->extcap_child_watch);
|
|
interface_opts->extcap_child_watch = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static
|
|
GPtrArray *extcap_prepare_arguments(interface_options *interface_opts)
|
|
{
|
|
GPtrArray *result = NULL;
|
|
|
|
if (interface_opts->if_type == IF_EXTCAP)
|
|
{
|
|
result = g_ptr_array_new();
|
|
|
|
#define add_arg(X) g_ptr_array_add(result, g_strdup(X))
|
|
|
|
add_arg(interface_opts->extcap);
|
|
add_arg(EXTCAP_ARGUMENT_RUN_CAPTURE);
|
|
add_arg(EXTCAP_ARGUMENT_INTERFACE);
|
|
add_arg(interface_opts->name);
|
|
if (interface_opts->cfilter && strlen(interface_opts->cfilter) > 0)
|
|
{
|
|
add_arg(EXTCAP_ARGUMENT_CAPTURE_FILTER);
|
|
add_arg(interface_opts->cfilter);
|
|
}
|
|
add_arg(EXTCAP_ARGUMENT_RUN_PIPE);
|
|
add_arg(interface_opts->extcap_fifo);
|
|
if (interface_opts->extcap_control_in)
|
|
{
|
|
add_arg(EXTCAP_ARGUMENT_CONTROL_OUT);
|
|
add_arg(interface_opts->extcap_control_in);
|
|
}
|
|
if (interface_opts->extcap_control_out)
|
|
{
|
|
add_arg(EXTCAP_ARGUMENT_CONTROL_IN);
|
|
add_arg(interface_opts->extcap_control_out);
|
|
}
|
|
if (interface_opts->extcap_args == NULL || g_hash_table_size(interface_opts->extcap_args) == 0)
|
|
{
|
|
/* User did not perform interface configuration.
|
|
*
|
|
* Check if there are any boolean flags that are set by default
|
|
* and hence their argument should be added.
|
|
*/
|
|
GList *arglist;
|
|
GList *elem;
|
|
|
|
arglist = extcap_get_if_configuration(interface_opts->name);
|
|
for (elem = g_list_first(arglist); elem; elem = elem->next)
|
|
{
|
|
GList *arg_list;
|
|
extcap_arg *arg_iter;
|
|
|
|
if (elem->data == NULL)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
arg_list = g_list_first((GList *)elem->data);
|
|
while (arg_list != NULL)
|
|
{
|
|
const gchar *stored = NULL;
|
|
/* In case of boolflags only first element in arg_list is relevant. */
|
|
arg_iter = (extcap_arg *)(arg_list->data);
|
|
if (arg_iter->pref_valptr != NULL)
|
|
{
|
|
stored = *arg_iter->pref_valptr;
|
|
}
|
|
|
|
if (arg_iter->arg_type == EXTCAP_ARG_BOOLFLAG)
|
|
{
|
|
if (extcap_complex_get_bool(arg_iter->default_complex))
|
|
{
|
|
add_arg(arg_iter->call);
|
|
}
|
|
else if (g_strcmp0(stored, "true") == 0)
|
|
{
|
|
add_arg(arg_iter->call);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (stored && strlen(stored) > 0) {
|
|
add_arg(arg_iter->call);
|
|
add_arg(stored);
|
|
}
|
|
}
|
|
|
|
arg_list = arg_list->next;
|
|
}
|
|
}
|
|
|
|
extcap_free_if_configuration(arglist, TRUE);
|
|
}
|
|
else
|
|
{
|
|
g_hash_table_foreach_remove(interface_opts->extcap_args, extcap_add_arg_and_remove_cb, result);
|
|
}
|
|
add_arg(NULL);
|
|
#undef add_arg
|
|
|
|
}
|
|
|
|
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
|
|
extcap_init_interfaces(capture_options *capture_opts)
|
|
{
|
|
guint i;
|
|
interface_options *interface_opts;
|
|
ws_pipe_t *pipedata;
|
|
|
|
for (i = 0; i < capture_opts->ifaces->len; i++)
|
|
{
|
|
GPtrArray *args = NULL;
|
|
GPid pid = WS_INVALID_PID;
|
|
|
|
interface_opts = &g_array_index(capture_opts->ifaces, interface_options, i);
|
|
|
|
/* skip native interfaces */
|
|
if (interface_opts->if_type != IF_EXTCAP)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* create control pipes if having toolbar */
|
|
if (extcap_has_toolbar(interface_opts->name))
|
|
{
|
|
extcap_create_pipe(interface_opts->name, &interface_opts->extcap_control_in,
|
|
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);
|
|
#ifdef _WIN32
|
|
interface_opts->extcap_control_out_h = pipe_h;
|
|
#endif
|
|
}
|
|
|
|
/* create pipe for fifo */
|
|
if (!extcap_create_pipe(interface_opts->name, &interface_opts->extcap_fifo,
|
|
EXTCAP_PIPE_PREFIX))
|
|
{
|
|
return FALSE;
|
|
}
|
|
#ifdef _WIN32
|
|
interface_opts->extcap_pipe_h = pipe_h;
|
|
#endif
|
|
|
|
/* Create extcap call */
|
|
args = extcap_prepare_arguments(interface_opts);
|
|
|
|
pipedata = g_new0(ws_pipe_t, 1);
|
|
|
|
pid = ws_pipe_spawn_async(pipedata, args);
|
|
|
|
g_ptr_array_foreach(args, ptr_array_free, NULL);
|
|
g_ptr_array_free(args, TRUE);
|
|
|
|
if (pid == WS_INVALID_PID)
|
|
{
|
|
g_free(pipedata);
|
|
continue;
|
|
}
|
|
|
|
ws_close(pipedata->stdin_fd);
|
|
interface_opts->extcap_pid = pid;
|
|
|
|
interface_opts->extcap_child_watch =
|
|
g_child_watch_add(pid, extcap_child_watch_cb, (gpointer)capture_opts);
|
|
|
|
#ifdef _WIN32
|
|
/* On Windows, wait for extcap to connect to named pipe.
|
|
* Some extcaps will present UAC screen to user.
|
|
* 30 second timeout should be reasonable timeout for extcap to
|
|
* connect to named pipe (including user interaction).
|
|
* Wait on multiple object in case of extcap termination
|
|
* without opening pipe.
|
|
*/
|
|
if (pid != WS_INVALID_PID)
|
|
{
|
|
HANDLE pipe_handles[3];
|
|
int num_pipe_handles = 1;
|
|
pipe_handles[0] = interface_opts->extcap_pipe_h;
|
|
|
|
if (extcap_has_toolbar(interface_opts->name))
|
|
{
|
|
pipe_handles[1] = interface_opts->extcap_control_in_h;
|
|
pipe_handles[2] = interface_opts->extcap_control_out_h;
|
|
num_pipe_handles += 2;
|
|
}
|
|
|
|
ws_pipe_wait_for_pipe(pipe_handles, num_pipe_handles, pid);
|
|
}
|
|
#endif
|
|
|
|
interface_opts->extcap_pipedata = (gpointer) pipedata;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#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;
|
|
SECURITY_ATTRIBUTES security;
|
|
|
|
/* create pipename */
|
|
current_time = time(NULL);
|
|
/*
|
|
* XXX - we trust Windows not to return a time before the Epoch here,
|
|
* so we won't get a null pointer back from localtime().
|
|
*/
|
|
strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(¤t_time));
|
|
pipename = g_strconcat("\\\\.\\pipe\\", pipe_prefix, "_", ifname, "_", timestr, NULL);
|
|
|
|
/* Security struct to enable Inheritable HANDLE */
|
|
memset(&security, 0, sizeof(SECURITY_ATTRIBUTES));
|
|
security.nLength = sizeof(SECURITY_ATTRIBUTES);
|
|
security.bInheritHandle = TRUE;
|
|
security.lpSecurityDescriptor = NULL;
|
|
|
|
/* create a namedPipe */
|
|
pipe_h = CreateNamedPipe(
|
|
utf_8to16(pipename),
|
|
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
|
|
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
|
|
1, 65536, 65536,
|
|
300,
|
|
&security);
|
|
|
|
if (pipe_h == INVALID_HANDLE_VALUE)
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "\nError creating pipe => (%d)", GetLastError());
|
|
g_free (pipename);
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
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;
|
|
|
|
gchar *pfx = g_strconcat(pipe_prefix, "_", ifname, NULL);
|
|
if ((fd = create_tempfile(&temp_name, pfx, NULL)) < 0)
|
|
{
|
|
g_free(pfx);
|
|
return FALSE;
|
|
}
|
|
g_free(pfx);
|
|
|
|
ws_close(fd);
|
|
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
|
|
"Extcap - Creating fifo: %s", temp_name);
|
|
|
|
if (file_exists(temp_name))
|
|
{
|
|
ws_unlink(temp_name);
|
|
}
|
|
|
|
if (mkfifo(temp_name, 0600) == 0)
|
|
{
|
|
*fifo = g_strdup(temp_name);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
/************* EXTCAP LOAD INTERFACE LIST ***************
|
|
*
|
|
* The following code handles loading and reloading the interface list. It is explicitly
|
|
* kept separate from the rest
|
|
*/
|
|
|
|
|
|
static void
|
|
extcap_free_interface_info(gpointer data)
|
|
{
|
|
extcap_info *info = (extcap_info *)data;
|
|
|
|
g_free(info->basename);
|
|
g_free(info->full_path);
|
|
g_free(info->version);
|
|
g_free(info->help);
|
|
|
|
extcap_free_interfaces(info->interfaces);
|
|
|
|
g_free(info);
|
|
}
|
|
|
|
static extcap_info *
|
|
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;
|
|
|
|
if ( ! _loaded_interfaces )
|
|
_loaded_interfaces = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, extcap_free_interface);
|
|
|
|
element = (extcap_info *) g_hash_table_lookup(_loaded_interfaces, toolname );
|
|
if ( ! element && create_if_nonexist )
|
|
{
|
|
g_hash_table_insert(_loaded_interfaces, g_strdup(toolname), g_new0(extcap_info, 1));
|
|
element = (extcap_info *) g_hash_table_lookup(_loaded_interfaces, toolname );
|
|
}
|
|
|
|
return element;
|
|
}
|
|
|
|
extcap_info *
|
|
extcap_get_tool_by_ifname(const gchar *ifname)
|
|
{
|
|
if ( ifname && _tool_for_ifname )
|
|
{
|
|
gchar * toolname = (gchar *)g_hash_table_lookup(_tool_for_ifname, ifname);
|
|
if ( toolname )
|
|
return extcap_ensure_interface(toolname, FALSE);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
extcap_info *
|
|
extcap_get_tool_info(const gchar * toolname)
|
|
{
|
|
return extcap_ensure_interface(toolname, FALSE);
|
|
}
|
|
|
|
static void remove_extcap_entry(gpointer entry, gpointer data _U_)
|
|
{
|
|
extcap_interface *int_iter = (extcap_interface*)entry;
|
|
|
|
if (int_iter->if_type == EXTCAP_SENTENCE_EXTCAP)
|
|
extcap_free_interface(entry);
|
|
}
|
|
|
|
static gboolean cb_load_interfaces(extcap_callback_info_t cb_info)
|
|
{
|
|
GList * interfaces = NULL, * control_items = NULL, * walker = NULL;
|
|
extcap_interface * int_iter = NULL;
|
|
extcap_info * element = NULL;
|
|
iface_toolbar * toolbar_entry = NULL;
|
|
gchar * toolname = g_path_get_basename(cb_info.extcap);
|
|
|
|
GList * interface_keys = g_hash_table_get_keys(_loaded_interfaces);
|
|
|
|
/* Load interfaces from utility */
|
|
interfaces = extcap_parse_interfaces(cb_info.output, &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 */
|
|
if ( ! interfaces || g_list_length(interfaces) == 0 )
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Cannot load interfaces for %s", cb_info.extcap );
|
|
/* Some utilities, androiddump for example, may actually don't present any interfaces, even
|
|
* if the utility itself is present. In such a case, we return here, but do not return
|
|
* FALSE, or otherwise further loading of other utilities will be stopped */
|
|
g_list_free(interface_keys);
|
|
g_free(toolname);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Load or create the storage element for the tool */
|
|
element = extcap_ensure_interface(toolname, TRUE);
|
|
if ( element == NULL )
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_ERROR, "Cannot store interface %s, maybe duplicate?", cb_info.extcap );
|
|
g_list_foreach(interfaces, remove_extcap_entry, NULL);
|
|
g_list_free(interfaces);
|
|
g_list_free(interface_keys);
|
|
g_free(toolname);
|
|
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)
|
|
{
|
|
int_iter = (extcap_interface *)walker->data;
|
|
|
|
if (int_iter->call != NULL)
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Interface found %s\n", int_iter->call);
|
|
|
|
/* Help is not necessarily stored with the interface, but rather with the version string.
|
|
* As the version string allways comes in front of the interfaces, this ensures, that it get's
|
|
* properly stored with the interface */
|
|
if (int_iter->if_type == EXTCAP_SENTENCE_EXTCAP)
|
|
{
|
|
if (int_iter->call != NULL)
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " Extcap [%s] ", int_iter->call);
|
|
|
|
/* Only initialize values if none are set. Need to check only one element here */
|
|
if ( ! element->version )
|
|
{
|
|
element->version = g_strdup(int_iter->version);
|
|
element->basename = g_strdup(toolname);
|
|
element->full_path = g_strdup(cb_info.extcap);
|
|
element->help = g_strdup(int_iter->help);
|
|
}
|
|
|
|
help = int_iter->help;
|
|
if (toolbar_entry)
|
|
{
|
|
toolbar_entry->menu_title = g_strdup(int_iter->display);
|
|
toolbar_entry->help = g_strdup(int_iter->help);
|
|
}
|
|
|
|
walker = g_list_next(walker);
|
|
continue;
|
|
}
|
|
|
|
/* Only interface definitions will be parsed here. help is already set by the extcap element,
|
|
* which makes it necessary to have version in the list before the interfaces. This is normally
|
|
* the case by design, but could be changed by separating the information in extcap-base. */
|
|
if ( int_iter->if_type == EXTCAP_SENTENCE_INTERFACE )
|
|
{
|
|
if ( g_list_find(interface_keys, int_iter->call) )
|
|
{
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING, "Extcap interface \"%s\" is already provided by \"%s\" ",
|
|
int_iter->call, (gchar *)extcap_if_executable(int_iter->call));
|
|
walker = g_list_next(walker);
|
|
continue;
|
|
}
|
|
|
|
if ((int_iter->call != NULL) && (int_iter->display))
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " Interface [%s] \"%s\" ", int_iter->call, int_iter->display);
|
|
|
|
int_iter->extcap_path = g_strdup(cb_info.extcap);
|
|
|
|
/* Only set the help, if it exists and no parsed help information is present */
|
|
if ( ! int_iter->help && help )
|
|
int_iter->help = g_strdup(help);
|
|
|
|
element->interfaces = g_list_append(element->interfaces, int_iter);
|
|
g_hash_table_insert(_tool_for_ifname, g_strdup(int_iter->call), g_strdup(toolname));
|
|
|
|
if (toolbar_entry)
|
|
{
|
|
if (!toolbar_entry->menu_title)
|
|
{
|
|
toolbar_entry->menu_title = g_strdup(int_iter->display);
|
|
}
|
|
toolbar_entry->ifnames = g_list_append(toolbar_entry->ifnames, g_strdup(int_iter->call));
|
|
}
|
|
}
|
|
|
|
walker = g_list_next(walker);
|
|
}
|
|
|
|
if (toolbar_entry && toolbar_entry->menu_title)
|
|
{
|
|
iface_toolbar_add(toolbar_entry);
|
|
extcap_iface_toolbar_add(cb_info.extcap, toolbar_entry);
|
|
}
|
|
|
|
g_list_foreach(interfaces, remove_extcap_entry, NULL);
|
|
g_list_free(interfaces);
|
|
g_list_free(interface_keys);
|
|
g_free(toolname);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Handles loading of the interfaces.
|
|
*
|
|
* A list of interfaces can be obtained by calling \ref extcap_loaded_interfaces
|
|
*/
|
|
static void
|
|
extcap_load_interface_list(void)
|
|
{
|
|
gchar *error = NULL;
|
|
|
|
if (prefs.capture_no_extcap)
|
|
return;
|
|
|
|
if (_toolbars)
|
|
{
|
|
// Remove existing interface toolbars here instead of in extcap_clear_interfaces()
|
|
// to avoid flicker in shown toolbars when refreshing interfaces.
|
|
GList *toolbar_list = g_hash_table_get_values (_toolbars);
|
|
for (GList *walker = toolbar_list; walker; walker = walker->next)
|
|
{
|
|
iface_toolbar *toolbar = (iface_toolbar *) walker->data;
|
|
iface_toolbar_remove(toolbar->menu_title);
|
|
}
|
|
g_hash_table_remove_all(_toolbars);
|
|
} else {
|
|
_toolbars = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, extcap_free_toolbar);
|
|
}
|
|
|
|
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 )
|
|
{
|
|
g_hash_table_remove_all(_tool_for_ifname);
|
|
_tool_for_ifname = 0;
|
|
} else {
|
|
_tool_for_ifname = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
|
|
}
|
|
|
|
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(arguments, cb_load_interfaces, cb_info, fallback);
|
|
|
|
g_list_free_full(fallback, g_free);
|
|
g_list_free_full(arguments, g_free);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|