/* capture_combo_utils.c * Utilities for combo box of interface names * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* With MSVC and a libethereal.dll this file needs to import some variables in a special way. Therefore _NEED_VAR_IMPORT_ is defined. */ #define _NEED_VAR_IMPORT_ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_LIBPCAP #include #include #include #include #include "pcap-util.h" #include "capture_combo_utils.h" /* * Find capture device description that matches interface name. */ static char * capture_dev_descr_find(const gchar *if_name) { char *p; char *p2 = NULL; char *descr = NULL; int lp = 0; int ct = 0; if (prefs.capture_devices_descr == NULL) { /* There are no descriptions. */ return NULL; } if ((p = strstr(prefs.capture_devices_descr, if_name)) == NULL) { /* There are, but there isn't one for this interface. */ return NULL; } while (*p != '\0') { /* error: ran into next interface description */ if (*p == ',') return NULL; /* found left parenthesis, start of description */ else if (*p == '(') { ct = 0; lp++; /* skip over left parenthesis */ p++; /* save pointer to beginning of description */ p2 = p; continue; } else if (*p == ')') { /* end of description */ break; } else { p++; ct++; } } if ((lp == 1) && (ct > 0) && (p2 != NULL)) { /* Allocate enough space to return the string, which runs from p2 to p, plus a terminating '\0'. */ descr = g_malloc(p - p2 + 1); memcpy(descr, p2, p - p2); descr[p - p2] = '\0'; return descr; } else return NULL; } GList * build_capture_combo_list(GList *if_list, gboolean do_hide) { GList *combo_list; GList *if_entry; if_info_t *if_info; char *if_string; gchar *descr; combo_list = NULL; if (if_list != NULL) { /* Scan through the list and build a list of strings to display. */ for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) { if_info = if_entry->data; /* Is this interface hidden and, if so, should we include it anyway? */ if (prefs.capture_devices_hide == NULL || strstr(prefs.capture_devices_hide, if_info->name) == NULL || !do_hide) { /* It's not hidden, or it is but we should include it in the list. */ /* Do we have a user-supplied description? */ descr = capture_dev_descr_find(if_info->name); if (descr != NULL) { /* Yes, we have a user-supplied description; use it. */ if_string = g_strdup_printf("%s: %s", descr, if_info->name); g_free(descr); } else { /* No, we don't have a user-supplied description; did we get one from the OS or libpcap? */ if (if_info->description != NULL) { /* Yes - use it. */ if_string = g_strdup_printf("%s: %s", if_info->description, if_info->name); } else { /* No. */ if_string = g_strdup(if_info->name); } } combo_list = g_list_append(combo_list, if_string); } } } return combo_list; } static void free_if_string(gpointer data, gpointer user_data _U_) { g_free(data); } void free_capture_combo_list(GList *combo_list) { if (combo_list != NULL) { g_list_foreach(combo_list, free_if_string, NULL); g_list_free(combo_list); } } /* * Given text that contains an interface name possibly prefixed by an * interface description, extract the interface name. */ char * get_if_name(char *if_text) { char *if_name; #ifdef _WIN32 /* * We cannot assume that the interface name doesn't contain a space; * some names on Windows OT do. * * We also can't assume it begins with "\Device\", either, as, on * Windows OT, WinPcap doesn't put "\Device\" in front of the name. * * As I remember, we can't assume that the interface description * doesn't contain a colon, either; I think some do. * * We can probably assume that the interface *name* doesn't contain * a colon, however; if any interface name does contain a colon on * Windows, it'll be time to just get rid of the damn interface * descriptions in the drop-down list, have just the names in the * drop-down list, and have a "Browse..." button to browse for interfaces, * with names, descriptions, IP addresses, blah blah blah available when * possible. * * So we search backwards for a colon. If we don't find it, just * return the entire string; otherwise, skip the colon and any blanks * after it, and return that string. */ if_name = if_text + strlen(if_text); for (;;) { if (if_name == if_text) { /* We're at the beginning of the string; return it. */ break; } if_name--; if (*if_name == ':') { /* * We've found a colon. * Unfortunately, a colon is used in the string "rpcap://", * which is used in case of a remote capture. * So we'll check to make sure the colon isn't followed by "//"; * it'll be followed by a blank if it separates the description * and the interface name. (We don't wire in "rpcap", in case we * support other protocols in the same syntax.) */ if (strncmp(if_name, "://", 3) != 0) { /* * OK, we've found a colon not followed by "//". Skip blanks * following it. */ if_name++; while (*if_name == ' ') if_name++; break; } } /* Keep looking for a colon not followed by "//". */ } #else /* * There's a space between the interface description and name, and * the interface name shouldn't have a space in it (it doesn't, on * UNIX systems); look backwards in the string for a space. * * (An interface name might, however, contain a colon in it, which * is why we don't use the colon search on UNIX.) */ if_name = strrchr(if_text, ' '); if (if_name == NULL) { if_name = if_text; } else { if_name++; } #endif return if_name; } #endif /* HAVE_LIBPCAP */