1 /* capture_combo_utils.c
2 * Utilities for combo box of interface names
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@ethereal.com>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 /* With MSVC and a libethereal.dll this file needs to import some variables
26 in a special way. Therefore _NEED_VAR_IMPORT_ is defined. */
27 #define _NEED_VAR_IMPORT_
39 #include <epan/prefs.h>
40 #include "pcap-util.h"
41 #include "capture_combo_utils.h"
44 * Find capture device description that matches interface name.
47 capture_dev_descr_find(const gchar *if_name)
55 if (prefs.capture_devices_descr == NULL) {
56 /* There are no descriptions. */
60 if ((p = strstr(prefs.capture_devices_descr, if_name)) == NULL) {
61 /* There are, but there isn't one for this interface. */
66 /* error: ran into next interface description */
69 /* found left parenthesis, start of description */
73 /* skip over left parenthesis */
75 /* save pointer to beginning of description */
80 /* end of description */
89 if ((lp == 1) && (ct > 0) && (p2 != NULL)) {
90 /* Allocate enough space to return the string,
91 which runs from p2 to p, plus a terminating
93 descr = g_malloc(p - p2 + 1);
94 memcpy(descr, p2, p - p2);
103 build_capture_combo_list(GList *if_list, gboolean do_hide)
112 if (if_list != NULL) {
113 /* Scan through the list and build a list of strings to display. */
114 for (if_entry = if_list; if_entry != NULL;
115 if_entry = g_list_next(if_entry)) {
116 if_info = if_entry->data;
118 /* Is this interface hidden and, if so, should we include it
120 if (prefs.capture_devices_hide == NULL ||
121 strstr(prefs.capture_devices_hide, if_info->name) == NULL ||
123 /* It's not hidden, or it is but we should include it in the list. */
125 /* Do we have a user-supplied description? */
126 descr = capture_dev_descr_find(if_info->name);
128 /* Yes, we have a user-supplied description; use it. */
129 if_string = g_strdup_printf("%s: %s", descr, if_info->name);
132 /* No, we don't have a user-supplied description; did we get
133 one from the OS or libpcap? */
134 if (if_info->description != NULL) {
136 if_string = g_strdup_printf("%s: %s", if_info->description,
140 if_string = g_strdup(if_info->name);
143 combo_list = g_list_append(combo_list, if_string);
151 free_if_string(gpointer data, gpointer user_data _U_)
157 free_capture_combo_list(GList *combo_list)
159 if (combo_list != NULL) {
160 g_list_foreach(combo_list, free_if_string, NULL);
161 g_list_free(combo_list);
166 * Given text that contains an interface name possibly prefixed by an
167 * interface description, extract the interface name.
170 get_if_name(char *if_text)
176 * We cannot assume that the interface name doesn't contain a space;
177 * some names on Windows OT do.
179 * We also can't assume it begins with "\Device\", either, as, on
180 * Windows OT, WinPcap doesn't put "\Device\" in front of the name.
182 * As I remember, we can't assume that the interface description
183 * doesn't contain a colon, either; I think some do.
185 * We can probably assume that the interface *name* doesn't contain
186 * a colon, however; if any interface name does contain a colon on
187 * Windows, it'll be time to just get rid of the damn interface
188 * descriptions in the drop-down list, have just the names in the
189 * drop-down list, and have a "Browse..." button to browse for interfaces,
190 * with names, descriptions, IP addresses, blah blah blah available when
193 * So we search backwards for a colon. If we don't find it, just
194 * return the entire string; otherwise, skip the colon and any blanks
195 * after it, and return that string.
197 if_name = if_text + strlen(if_text);
199 if (if_name == if_text) {
200 /* We're at the beginning of the string; return it. */
204 if (*if_name == ':') {
206 * We've found a colon.
207 * Unfortunately, a colon is used in the string "rpcap://",
208 * which is used in case of a remote capture.
209 * So we'll check to make sure the colon isn't followed by "//";
210 * it'll be followed by a blank if it separates the description
211 * and the interface name. (We don't wire in "rpcap", in case we
212 * support other protocols in the same syntax.)
214 if (strncmp(if_name, "://", 3) != 0) {
216 * OK, we've found a colon not followed by "//". Skip blanks
220 while (*if_name == ' ')
225 /* Keep looking for a colon not followed by "//". */
229 * There's a space between the interface description and name, and
230 * the interface name shouldn't have a space in it (it doesn't, on
231 * UNIX systems); look backwards in the string for a space.
233 * (An interface name might, however, contain a colon in it, which
234 * is why we don't use the colon search on UNIX.)
236 if_name = strrchr(if_text, ' ');
237 if (if_name == NULL) {
248 #endif /* HAVE_LIBPCAP */