2 * Utilities for capture user interfaces
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
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.
34 #include <epan/prefs.h>
35 #include "capture-pcap-util.h"
36 #include "capture_ui_utils.h"
39 * Find user-specified capture device description that matches interface
43 capture_dev_user_descr_find(const gchar *if_name)
51 if (prefs.capture_devices_descr == NULL) {
52 /* There are no descriptions. */
56 if ((p = strstr(prefs.capture_devices_descr, if_name)) == NULL) {
57 /* There are, but there isn't one for this interface. */
62 /* error: ran into next interface description */
65 /* found left parenthesis, start of description */
69 /* skip over left parenthesis */
71 /* save pointer to beginning of description */
76 /* end of description */
85 if ((lp == 1) && (ct > 0) && (p2 != NULL)) {
86 /* Allocate enough space to return the string,
87 which runs from p2 to p, plus a terminating
89 descr = g_malloc(p - p2 + 1);
90 memcpy(descr, p2, p - p2);
99 * Return as descriptive a name for an interface as we can get.
100 * If the user has specified a comment, use that. Otherwise,
101 * if get_interface_list() supplies a description, use that,
102 * otherwise use the interface name.
105 get_interface_descriptive_name(const char *if_name)
112 char err_buf[CAPTURE_PCAP_ERRBUF_SIZE];
114 /* Do we have a user-supplied description? */
115 descr = capture_dev_user_descr_find(if_name);
117 /* Yes - make a copy of that. */
118 descr = g_strdup(descr);
120 /* No, we don't have a user-supplied description; did we get
121 one from the OS or libpcap? */
123 if_list = get_interface_list(&err, err_buf);
124 if (if_list != NULL) {
127 if_info = if_entry->data;
128 if (strcmp(if_info->name, if_name) == 0) {
129 if (if_info->description != NULL) {
130 /* Return a copy of that - when we free the interface
131 list, that'll also free up the strings to which
133 descr = g_strdup(if_info->description);
137 } while ((if_entry = g_list_next(if_entry)) != NULL);
139 free_interface_list(if_list);
142 /* The interface name is all we have, so just return a copy of that. */
143 descr = g_strdup(if_name);
151 /* search interface info by interface name */
153 search_info(GList *if_list, gchar *if_name)
159 for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
160 if_info = if_entry->data;
162 if(strcmp(if_name, if_info->name) == 0) {
171 /* build the string to display in the combo box for the given interface */
173 build_capture_combo_name(GList *if_list, gchar *if_name)
180 /* Do we have a user-supplied description? */
181 descr = capture_dev_user_descr_find(if_name);
183 /* Yes, we have a user-supplied description; use it. */
184 if_string = g_strdup_printf("%s: %s", descr, if_name);
187 /* No, we don't have a user-supplied description; did we get
188 one from the OS or libpcap? */
189 if_info = search_info(if_list, if_name);
190 if (if_info && if_info->description != NULL) {
192 if_string = g_strdup_printf("%s: %s", if_info->description,
196 if_string = g_strdup(if_name);
205 build_capture_combo_list(GList *if_list, gboolean do_hide)
214 if (if_list != NULL) {
215 /* Scan through the list and build a list of strings to display. */
216 for (if_entry = if_list; if_entry != NULL;
217 if_entry = g_list_next(if_entry)) {
218 if_info = if_entry->data;
220 /* Is this interface hidden and, if so, should we include it
222 if (prefs.capture_devices_hide == NULL ||
223 strstr(prefs.capture_devices_hide, if_info->name) == NULL ||
225 /* It's not hidden, or it is but we should include it in the list. */
227 /* Do we have a user-supplied description? */
228 descr = capture_dev_user_descr_find(if_info->name);
230 /* Yes, we have a user-supplied description; use it. */
231 if_string = g_strdup_printf("%s: %s", descr, if_info->name);
234 /* No, we don't have a user-supplied description; did we get
235 one from the OS or libpcap? */
236 if (if_info->description != NULL) {
238 if_string = g_strdup_printf("%s: %s", if_info->description,
242 if_string = g_strdup(if_info->name);
245 combo_list = g_list_append(combo_list, if_string);
253 free_if_string(gpointer data, gpointer user_data _U_)
259 free_capture_combo_list(GList *combo_list)
261 if (combo_list != NULL) {
262 g_list_foreach(combo_list, free_if_string, NULL);
263 g_list_free(combo_list);
268 * Given text that contains an interface name possibly prefixed by an
269 * interface description, extract the interface name.
272 get_if_name(const char *if_text)
278 * We cannot assume that the interface name doesn't contain a space;
279 * some names on Windows OT do.
281 * We also can't assume it begins with "\Device\", either, as, on
282 * Windows OT, WinPcap doesn't put "\Device\" in front of the name.
284 * As I remember, we can't assume that the interface description
285 * doesn't contain a colon, either; I think some do.
287 * We can probably assume that the interface *name* doesn't contain
288 * a colon, however; if any interface name does contain a colon on
289 * Windows, it'll be time to just get rid of the damn interface
290 * descriptions in the drop-down list, have just the names in the
291 * drop-down list, and have a "Browse..." button to browse for interfaces,
292 * with names, descriptions, IP addresses, blah blah blah available when
295 * So we search backwards for a colon. If we don't find it, just
296 * return the entire string; otherwise, skip the colon and any blanks
297 * after it, and return that string.
299 if_name = if_text + strlen(if_text);
301 if (if_name == if_text) {
302 /* We're at the beginning of the string; return it. */
306 if (*if_name == ':') {
308 * We've found a colon.
309 * Unfortunately, a colon is used in the string "rpcap://",
310 * which is used in case of a remote capture.
311 * So we'll check to make sure the colon isn't followed by "//";
312 * it'll be followed by a blank if it separates the description
313 * and the interface name. (We don't wire in "rpcap", in case we
314 * support other protocols in the same syntax.)
316 if (strncmp(if_name, "://", 3) != 0) {
318 * OK, we've found a colon not followed by "//". Skip blanks
322 while (*if_name == ' ')
327 /* Keep looking for a colon not followed by "//". */
331 * There's a space between the interface description and name, and
332 * the interface name shouldn't have a space in it (it doesn't, on
333 * UNIX systems); look backwards in the string for a space.
335 * (An interface name might, however, contain a colon in it, which
336 * is why we don't use the colon search on UNIX.)
338 if_name = strrchr(if_text, ' ');
339 if (if_name == NULL) {
348 #endif /* HAVE_LIBPCAP */