forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Change-Id: Id0f3d4d60a1acc7aa64fd3737b8f16df5bca4e5a Reviewed-on: https://code.wireshark.org/review/2708 Reviewed-by: Guy Harris <guy@alum.mit.edu>
438 lines
18 KiB
C
438 lines
18 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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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* Used when sorting an interface list into alphabetical order by
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* their friendly names.
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*/
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gint
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if_list_comparator_alph(const void *first_arg, const void *second_arg)
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{
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const if_info_t *first = (const if_info_t *)first_arg, *second = (const if_info_t *)second_arg;
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if (first != NULL && first->friendly_name != NULL &&
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second != NULL && second->friendly_name != NULL) {
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return g_ascii_strcasecmp(first->friendly_name, second->friendly_name);
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} else {
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return 0;
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}
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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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char *if_string;
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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, err;
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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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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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}
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}
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/* Scan through the list and build a list of strings to display. */
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if_list = capture_interface_list(&err, NULL, update_cb);
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count = 0;
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for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
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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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if (if_info->friendly_name != NULL) {
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device.friendly_name = g_strdup(if_info->friendly_name);
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} else {
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device.friendly_name = NULL;
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}
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device.hidden = FALSE;
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device.locked = FALSE;
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temp = (if_info_t *)g_malloc0(sizeof(if_info_t));
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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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/* Is this interface hidden and, if so, should we include it anyway? */
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/* Do we have a user-supplied description? */
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descr = capture_dev_user_descr_find(if_info->name);
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if (descr != NULL) {
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/* Yes, we have a user-supplied description; use it. */
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if_string = g_strdup_printf("%s: %s", descr, if_info->name);
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g_free(descr);
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} else {
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/* No, we don't have a user-supplied description; did we get
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one from the OS or libpcap? */
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if (if_info->friendly_name != NULL) {
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/* We have a friendly name from the OS, use it */
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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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if_string = 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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if_string = g_strdup_printf("%s: %s", if_info->friendly_name, if_info->name);
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#endif
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} else if (if_info->vendor_description != NULL) {
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/* We have a device description from libpcap - use it. */
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if_string = g_strdup_printf("%s: %s", if_info->vendor_description, if_info->name);
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} else {
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/* No. */
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if_string = g_strdup(if_info->name);
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}
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}
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device.display_name = if_string;
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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, 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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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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g_string_append(ip_str, ip_to_str((guint8 *)&addr->addr.ip4_addr));
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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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g_string_append(ip_str, ip6_guint8_to_str(addr->addr.ip6_addr));
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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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} 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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* If there's a preference for the link-layer header type for
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* this interface, use it. If not, use the all-interface
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* default; if that's not set on the command line, that will
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* be -1, meaning "use per-interface defaults", otherwise
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* we'll fail if it's not one of the types the interface
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* supports.
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*/
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if ((device.active_dlt = capture_dev_user_linktype_find(if_info->name)) == -1) {
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device.active_dlt = global_capture_opts.default_options.linktype;
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}
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/*
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* Process the list of link-layer header types.
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* If the active link-layer header type wasn't set from a
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* preference or a global option (meaning it's -1), default
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* to the first link-layer header type in the list.
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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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if (linktype_count == 0 && device.active_dlt == -1) {
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device.active_dlt = data_link_info->dlt;
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}
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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_printf("%s", 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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} 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 ((device.pmode = capture_dev_user_pmode_find(if_info->name)) == -1) {
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device.pmode = global_capture_opts.default_options.promisc_mode;
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}
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if ((device.has_snaplen = capture_dev_user_hassnap_find(if_info->name)) == -1) {
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device.has_snaplen = global_capture_opts.default_options.has_snaplen;
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}
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if (capture_dev_user_snaplen_find(if_info->name) == -1) {
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device.snaplen = global_capture_opts.default_options.snaplen;
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} else {
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device.snaplen = (guint)capture_dev_user_snaplen_find(if_info->name);
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}
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device.cfilter = g_strdup(global_capture_opts.default_options.cfilter);
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#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
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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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if (global_capture_opts.ifaces->len > 0) {
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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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if (strcmp(interface_opts.name, device.name) == 0) {
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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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device.cfilter = g_strdup(interface_opts.cfilter);
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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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device.selected = TRUE;
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global_capture_opts.num_selected++;
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break;
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}
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}
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}
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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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/* see whether there are additional interfaces in ifaces */
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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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device.name = g_strdup(interface_opts.name);
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device.display_name = g_strdup_printf("%s: %s", device.name, interface_opts.descr);
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device.hidden = FALSE;
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device.selected = TRUE;
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device.type = IF_PIPE;
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#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
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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.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.locked = FALSE;
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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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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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}
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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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GTimeVal start_time;
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GTimeVal end_time;
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float 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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g_get_current_time(&start_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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g_get_current_time(&end_time);
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elapsed = (float) ((end_time.tv_sec - start_time.tv_sec) +
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((end_time.tv_usec - start_time.tv_usec) / 1e6));
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g_log(LOG_DOMAIN_MAIN, G_LOG_LEVEL_INFO, "fill_in_local_interfaces() ends, taking %.3fs", elapsed);
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}
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void
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hide_interface(gchar* new_hide)
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{
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gchar *tok;
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guint i;
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interface_t device;
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gboolean found = FALSE;
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GList *hidden_devices = NULL, *entry;
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if (new_hide != NULL) {
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for (tok = strtok (new_hide, ","); tok; tok = strtok(NULL, ",")) {
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hidden_devices = g_list_append(hidden_devices, tok);
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}
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}
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for (i = 0; i < 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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found = FALSE;
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for (entry = hidden_devices; entry != NULL; entry = g_list_next(entry)) {
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if (strcmp((char *)entry->data, device.name)==0) {
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device.hidden = TRUE;
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if (device.selected) {
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device.selected = FALSE;
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global_capture_opts.num_selected--;
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}
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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) {
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device.hidden = FALSE;
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}
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global_capture_opts.all_ifaces = g_array_remove_index(global_capture_opts.all_ifaces, i);
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g_array_insert_val(global_capture_opts.all_ifaces, i, device);
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}
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}
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#endif /* HAVE_LIBPCAP */
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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