forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Change-Id: Ib9ff78d148a2364c84d84b4a9b020b3d783654a3 Reviewed-on: https://code.wireshark.org/review/36602 Petri-Dish: Guy Harris <gharris@sonic.net> Tested-by: Petri Dish Buildbot Reviewed-by: Guy Harris <gharris@sonic.net>
516 lines
20 KiB
C
516 lines
20 KiB
C
/* iface_lists.c
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* Code to manage the global list of interfaces and to update widgets/windows
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* displaying items from those lists
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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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#ifdef HAVE_LIBPCAP
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#include <string.h>
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#include <glib.h>
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#include <epan/prefs.h>
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#include <epan/to_str.h>
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#include "ui/capture_ui_utils.h"
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#include "ui/capture_globals.h"
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#include "ui/iface_lists.h"
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#include "../log.h"
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/*
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* Try to populate the given device with options (like capture filter) from
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* the capture options that are in use for an existing capture interface.
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* Returns TRUE if the interface is selected for capture and FALSE otherwise.
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*/
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static gboolean
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fill_from_ifaces (interface_t *device)
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{
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interface_options *interface_opts;
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guint i;
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for (i = 0; i < global_capture_opts.ifaces->len; i++) {
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interface_opts = &g_array_index(global_capture_opts.ifaces, interface_options, i);
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if (strcmp(interface_opts->name, device->name) != 0) {
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continue;
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}
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#if defined(HAVE_PCAP_CREATE)
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device->buffer = interface_opts->buffer_size;
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device->monitor_mode_enabled = interface_opts->monitor_mode;
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#endif
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device->pmode = interface_opts->promisc_mode;
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device->has_snaplen = interface_opts->has_snaplen;
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device->snaplen = interface_opts->snaplen;
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g_free(device->cfilter);
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device->cfilter = g_strdup(interface_opts->cfilter);
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device->timestamp_type = g_strdup(interface_opts->timestamp_type);
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if (interface_opts->linktype != -1) {
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device->active_dlt = interface_opts->linktype;
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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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get_iface_display_name(const gchar *description, const if_info_t *if_info)
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{
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/* Do we have a user-supplied description? */
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if (description && description[0]) {
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/*
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* Yes - show both the user-supplied description and a name for the
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* interface.
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*/
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#ifdef _WIN32
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/*
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* On Windows, if we have a friendly name, just show it
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* rather than the name, as the name is a string made out
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* of the device GUID, and not at all friendly.
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*/
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gchar *if_string = if_info->friendly_name ? if_info->friendly_name : if_info->name;
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return g_strdup_printf("%s: %s", description, if_string);
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#else
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/*
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* On UN*X, show the interface name; it's short and somewhat
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* friendly, and many UN*X users are used to interface names,
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* so we should show it.
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*/
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return g_strdup_printf("%s: %s", description, if_info->name);
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#endif
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}
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if (if_info->friendly_name) {
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/* We have a friendly name from the OS. */
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#ifdef _WIN32
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/*
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* On Windows, if we have a friendly name, just show it,
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* don't show the name, as that's a string made out of
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* the device GUID, and not at all friendly.
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*/
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return g_strdup_printf("%s", if_info->friendly_name);
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#else
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/*
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* On UN*X, if we have a friendly name, show it along
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* with the interface name; the interface name is short
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* and somewhat friendly, and many UN*X users are used
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* to interface names, so we should show it.
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*/
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return g_strdup_printf("%s: %s", if_info->friendly_name, if_info->name);
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#endif
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}
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if (if_info->vendor_description) {
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/* We have a device description from libpcap. */
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return g_strdup_printf("%s: %s", if_info->vendor_description, if_info->name);
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}
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/* No additional descriptions found. */
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return g_strdup(if_info->name);
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}
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/*
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* Fetch the list of local interfaces with capture_interface_list()
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* and set the list of "all interfaces" in *capture_opts to include
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* those interfaces.
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*/
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void
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scan_local_interfaces(void (*update_cb)(void))
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{
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GList *if_entry, *lt_entry, *if_list;
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if_info_t *if_info, temp;
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gchar *descr;
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if_capabilities_t *caps=NULL;
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gint linktype_count;
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gboolean monitor_mode;
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GSList *curr_addr;
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int ips = 0, i;
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guint count = 0, j;
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if_addr_t *addr, *temp_addr;
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link_row *link = NULL;
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data_link_info_t *data_link_info;
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interface_t device;
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GString *ip_str;
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interface_options *interface_opts;
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gboolean found = FALSE;
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static gboolean running = FALSE;
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GHashTable *selected_devices;
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if (running) {
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/* scan_local_interfaces internally calls update_cb to process UI events
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to avoid stuck UI while running possibly slow operations. A side effect
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of this is that new interface changes can be detected before completing
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the last one.
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This return avoids recursive scan_local_interfaces operation. */
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return;
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}
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running = TRUE;
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/*
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* Clear list of known interfaces (all_ifaces) that will be re-discovered on
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* scanning, but remember their selection state.
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*
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* XXX shouldn't this copy settings (like capture filter) from the "old"
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* device to the "new" device? Refreshing the interfaces list should
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* probably just remove disappeared devices and add discovered devices.
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*/
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selected_devices = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
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if (global_capture_opts.all_ifaces->len > 0) {
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for (i = (int)global_capture_opts.all_ifaces->len-1; i >= 0; i--) {
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device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
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if (device.local && device.type != IF_PIPE && device.type != IF_STDIN) {
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global_capture_opts.all_ifaces = g_array_remove_index(global_capture_opts.all_ifaces, i);
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/*
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* Device is about to be destroyed, unmark as selected. It will
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* be reselected on rediscovery.
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*/
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if (device.selected) {
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gchar *device_name = g_strdup(device.name);
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/* g_hash_table_add() only exists since 2.32. */
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g_hash_table_replace(selected_devices, device_name, device_name);
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global_capture_opts.num_selected--;
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}
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capture_opts_free_interface_t(&device);
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}
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}
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}
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/* Retrieve list of interface information (if_info_t) into if_list. */
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g_free(global_capture_opts.ifaces_err_info);
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if_list = capture_interface_list(&global_capture_opts.ifaces_err,
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&global_capture_opts.ifaces_err_info,
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update_cb);
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count = 0;
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/*
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* For each discovered interface name, create a new device and add extra
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* information (like supported DLTs, assigned IP addresses).
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*/
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for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
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memset(&device, 0, sizeof(device));
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if_info = (if_info_t *)if_entry->data;
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ip_str = g_string_new("");
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ips = 0;
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if (strstr(if_info->name, "rpcap:")) {
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continue;
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}
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device.name = g_strdup(if_info->name);
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device.friendly_name = g_strdup(if_info->friendly_name);
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device.vendor_description = g_strdup(if_info->vendor_description);
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device.hidden = FALSE;
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memset(&temp, 0, sizeof(temp));
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temp.name = g_strdup(if_info->name);
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temp.friendly_name = g_strdup(if_info->friendly_name);
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temp.vendor_description = g_strdup(if_info->vendor_description);
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temp.loopback = if_info->loopback;
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temp.type = if_info->type;
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temp.extcap = g_strdup(if_info->extcap);
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/* Is this interface hidden and, if so, should we include it anyway? */
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descr = capture_dev_user_descr_find(if_info->name);
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device.display_name = get_iface_display_name(descr, if_info);
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g_free(descr);
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device.selected = FALSE;
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if (prefs_is_capture_device_hidden(if_info->name)) {
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device.hidden = TRUE;
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}
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device.type = if_info->type;
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monitor_mode = prefs_capture_device_monitor_mode(if_info->name);
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caps = capture_get_if_capabilities(if_info->name, monitor_mode, NULL, NULL, update_cb);
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for (; (curr_addr = g_slist_nth(if_info->addrs, ips)) != NULL; ips++) {
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temp_addr = (if_addr_t *)g_malloc0(sizeof(if_addr_t));
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if (ips != 0) {
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g_string_append(ip_str, "\n");
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}
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addr = (if_addr_t *)curr_addr->data;
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if (addr) {
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address addr_str;
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char* temp_addr_str = NULL;
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temp_addr->ifat_type = addr->ifat_type;
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switch (addr->ifat_type) {
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case IF_AT_IPv4:
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temp_addr->addr.ip4_addr = addr->addr.ip4_addr;
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set_address(&addr_str, AT_IPv4, 4, &addr->addr.ip4_addr);
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temp_addr_str = address_to_str(NULL, &addr_str);
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g_string_append(ip_str, temp_addr_str);
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break;
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case IF_AT_IPv6:
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memcpy(temp_addr->addr.ip6_addr, addr->addr.ip6_addr, sizeof(addr->addr));
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set_address(&addr_str, AT_IPv6, 16, addr->addr.ip6_addr);
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temp_addr_str = address_to_str(NULL, &addr_str);
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g_string_append(ip_str, temp_addr_str);
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break;
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default:
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/* In case we add non-IP addresses */
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break;
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}
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wmem_free(NULL, temp_addr_str);
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} else {
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g_free(temp_addr);
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temp_addr = NULL;
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}
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if (temp_addr) {
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temp.addrs = g_slist_append(temp.addrs, temp_addr);
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}
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}
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#ifdef HAVE_PCAP_REMOTE
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device.local = TRUE;
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device.remote_opts.src_type = CAPTURE_IFLOCAL;
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device.remote_opts.remote_host_opts.remote_host = g_strdup(global_capture_opts.default_options.remote_host);
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device.remote_opts.remote_host_opts.remote_port = g_strdup(global_capture_opts.default_options.remote_port);
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device.remote_opts.remote_host_opts.auth_type = global_capture_opts.default_options.auth_type;
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device.remote_opts.remote_host_opts.auth_username = g_strdup(global_capture_opts.default_options.auth_username);
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device.remote_opts.remote_host_opts.auth_password = g_strdup(global_capture_opts.default_options.auth_password);
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device.remote_opts.remote_host_opts.datatx_udp = global_capture_opts.default_options.datatx_udp;
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device.remote_opts.remote_host_opts.nocap_rpcap = global_capture_opts.default_options.nocap_rpcap;
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device.remote_opts.remote_host_opts.nocap_local = global_capture_opts.default_options.nocap_local;
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#endif
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#ifdef HAVE_PCAP_SETSAMPLING
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device.remote_opts.sampling_method = global_capture_opts.default_options.sampling_method;
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device.remote_opts.sampling_param = global_capture_opts.default_options.sampling_param;
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#endif
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linktype_count = 0;
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device.links = NULL;
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if (caps != NULL) {
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#if defined(HAVE_PCAP_CREATE)
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device.monitor_mode_enabled = monitor_mode;
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device.monitor_mode_supported = caps->can_set_rfmon;
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#endif
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/*
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* Process the list of link-layer header types.
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*/
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for (lt_entry = caps->data_link_types; lt_entry != NULL; lt_entry = g_list_next(lt_entry)) {
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data_link_info = (data_link_info_t *)lt_entry->data;
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link = (link_row *)g_malloc(sizeof(link_row));
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if (data_link_info->description != NULL) {
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link->dlt = data_link_info->dlt;
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link->name = g_strdup(data_link_info->description);
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} else {
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link->dlt = -1;
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link->name = g_strdup_printf("%s (not supported)", data_link_info->name);
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}
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device.links = g_list_append(device.links, link);
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linktype_count++;
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}
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/*
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* Set the active DLT for the device appropriately.
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*/
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set_active_dlt(&device, global_capture_opts.default_options.linktype);
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} else {
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#if defined(HAVE_PCAP_CREATE)
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device.monitor_mode_enabled = FALSE;
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device.monitor_mode_supported = FALSE;
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#endif
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device.active_dlt = -1;
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}
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device.addresses = g_strdup(ip_str->str);
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device.no_addresses = ips;
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device.local = TRUE;
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device.if_info = temp;
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device.last_packets = 0;
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if (!capture_dev_user_pmode_find(if_info->name, &device.pmode)) {
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device.pmode = global_capture_opts.default_options.promisc_mode;
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}
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if (!capture_dev_user_snaplen_find(if_info->name, &device.has_snaplen,
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&device.snaplen)) {
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device.has_snaplen = global_capture_opts.default_options.has_snaplen;
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device.snaplen = global_capture_opts.default_options.snaplen;
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}
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device.cfilter = g_strdup(global_capture_opts.default_options.cfilter);
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device.timestamp_type = g_strdup(global_capture_opts.default_options.timestamp_type);
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#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
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if ((device.buffer = capture_dev_user_buffersize_find(if_info->name)) == -1) {
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device.buffer = global_capture_opts.default_options.buffer_size;
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}
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#endif
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/* Copy interface options for active capture devices. */
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gboolean selected = fill_from_ifaces(&device);
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/* Restore device selection (for next capture). */
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if (!device.selected && (selected || g_hash_table_lookup(selected_devices, device.name))) {
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device.selected = TRUE;
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global_capture_opts.num_selected++;
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}
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/* Extcap devices start with no cached args */
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device.external_cap_args_settings = NULL;
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if (global_capture_opts.all_ifaces->len <= count) {
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g_array_append_val(global_capture_opts.all_ifaces, device);
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count = global_capture_opts.all_ifaces->len;
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} else {
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g_array_insert_val(global_capture_opts.all_ifaces, count, device);
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}
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if (caps != NULL) {
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free_if_capabilities(caps);
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}
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g_string_free(ip_str, TRUE);
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count++;
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}
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free_interface_list(if_list);
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/*
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* Pipes and stdin are not really discoverable interfaces, so re-add them to
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* the list of all interfaces (all_ifaces).
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*/
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for (j = 0; j < global_capture_opts.ifaces->len; j++) {
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interface_opts = &g_array_index(global_capture_opts.ifaces, interface_options, j);
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found = FALSE;
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for (i = 0; i < (int)global_capture_opts.all_ifaces->len; i++) {
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device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
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if (strcmp(device.name, interface_opts->name) == 0) {
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found = TRUE;
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break;
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}
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}
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if (!found) { /* new interface, maybe a pipe */
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memset(&device, 0, sizeof(device));
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device.name = g_strdup(interface_opts->name);
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device.vendor_description = g_strdup(interface_opts->hardware);
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device.display_name = interface_opts->descr ?
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g_strdup_printf("%s: %s", device.name, interface_opts->descr) :
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g_strdup(device.name);
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device.hidden = FALSE;
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device.selected = TRUE;
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device.type = interface_opts->if_type;
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#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
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device.buffer = interface_opts->buffer_size;
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#endif
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#if defined(HAVE_PCAP_CREATE)
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device.monitor_mode_enabled = interface_opts->monitor_mode;
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device.monitor_mode_supported = FALSE;
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#endif
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device.pmode = interface_opts->promisc_mode;
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device.has_snaplen = interface_opts->has_snaplen;
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device.snaplen = interface_opts->snaplen;
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device.cfilter = g_strdup(interface_opts->cfilter);
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device.timestamp_type = g_strdup(interface_opts->timestamp_type);
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device.active_dlt = interface_opts->linktype;
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device.addresses = NULL;
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device.no_addresses = 0;
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device.last_packets = 0;
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device.links = NULL;
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device.local = TRUE;
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device.if_info.name = g_strdup(interface_opts->name);
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device.if_info.friendly_name = NULL;
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device.if_info.vendor_description = g_strdup(interface_opts->descr);
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device.if_info.addrs = NULL;
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device.if_info.loopback = FALSE;
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device.if_info.extcap = g_strdup(interface_opts->extcap);
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g_array_append_val(global_capture_opts.all_ifaces, device);
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global_capture_opts.num_selected++;
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}
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}
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g_hash_table_destroy(selected_devices);
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running = FALSE;
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}
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/*
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* Get the global interface list. Generate it if we haven't done so
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* already. This can be quite time consuming the first time, so
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* record how long it takes in the info log.
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*/
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void
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fill_in_local_interfaces(void(*update_cb)(void))
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{
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gint64 start_time;
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double elapsed;
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static gboolean initialized = FALSE;
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/* record the time we started, so we can log total time later */
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start_time = g_get_monotonic_time();
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g_log(LOG_DOMAIN_MAIN, G_LOG_LEVEL_INFO, "fill_in_local_interfaces() starts");
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if (!initialized) {
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/* do the actual work */
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scan_local_interfaces(update_cb);
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initialized = TRUE;
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}
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/* log how long it took */
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|
elapsed = (g_get_monotonic_time() - start_time) / 1e6;
|
|
|
|
g_log(LOG_DOMAIN_MAIN, G_LOG_LEVEL_INFO, "fill_in_local_interfaces() ends, taking %.3fs", elapsed);
|
|
}
|
|
|
|
void
|
|
hide_interface(gchar* new_hide)
|
|
{
|
|
gchar *tok;
|
|
guint i;
|
|
interface_t *device;
|
|
gboolean found = FALSE;
|
|
GList *hidden_devices = NULL, *entry;
|
|
if (new_hide != NULL) {
|
|
for (tok = strtok (new_hide, ","); tok; tok = strtok(NULL, ",")) {
|
|
hidden_devices = g_list_append(hidden_devices, tok);
|
|
}
|
|
}
|
|
for (i = 0; i < global_capture_opts.all_ifaces->len; i++) {
|
|
device = &g_array_index(global_capture_opts.all_ifaces, interface_t, i);
|
|
found = FALSE;
|
|
for (entry = hidden_devices; entry != NULL; entry = g_list_next(entry)) {
|
|
if (strcmp((char *)entry->data, device->name)==0) {
|
|
device->hidden = TRUE;
|
|
if (device->selected) {
|
|
device->selected = FALSE;
|
|
global_capture_opts.num_selected--;
|
|
}
|
|
found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
device->hidden = FALSE;
|
|
}
|
|
}
|
|
g_list_free(hidden_devices);
|
|
g_free(new_hide);
|
|
}
|
|
|
|
void
|
|
update_local_interfaces(void)
|
|
{
|
|
interface_t *device;
|
|
gchar *descr;
|
|
guint i;
|
|
|
|
for (i = 0; i < global_capture_opts.all_ifaces->len; i++) {
|
|
device = &g_array_index(global_capture_opts.all_ifaces, interface_t, i);
|
|
device->type = capture_dev_user_linktype_find(device->name);
|
|
g_free(device->display_name);
|
|
descr = capture_dev_user_descr_find(device->name);
|
|
device->display_name = get_iface_display_name(descr, &device->if_info);
|
|
g_free (descr);
|
|
device->hidden = prefs_is_capture_device_hidden(device->name);
|
|
fill_from_ifaces(device);
|
|
}
|
|
}
|
|
#endif /* HAVE_LIBPCAP */
|
|
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|