2000-03-26 00:33:07 +00:00
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/*
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conf.c -- configuration code
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2000-11-28 23:12:57 +00:00
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Copyright (C) 1998 Robert van der Meulen
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2006-04-26 13:52:58 +00:00
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1998-2005 Ivo Timmermans
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2009-03-05 13:12:36 +00:00
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2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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2006-04-26 13:52:58 +00:00
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2000 Cris van Pelt
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2000-03-26 00:33:07 +00:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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2009-09-24 22:01:00 +00:00
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2000-03-26 00:33:07 +00:00
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*/
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2003-07-17 15:06:27 +00:00
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#include "system.h"
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2000-03-26 00:33:07 +00:00
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2003-07-17 15:06:27 +00:00
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#include "avl_tree.h"
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2000-03-26 00:33:07 +00:00
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#include "conf.h"
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2003-07-06 22:11:37 +00:00
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#include "logger.h"
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2003-07-17 15:06:27 +00:00
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#include "netutl.h" /* for str2address */
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#include "utils.h" /* for cp */
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#include "xalloc.h"
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2000-05-29 21:01:26 +00:00
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2001-10-10 20:34:27 +00:00
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avl_tree_t *config_tree;
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2006-01-19 17:13:18 +00:00
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int pinginterval = 0; /* seconds between pings */
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int pingtimeout = 0; /* seconds to wait for response */
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2002-09-09 21:25:28 +00:00
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char *confbase = NULL; /* directory in which all config files are */
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char *netname = NULL; /* name of the vpn network */
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2000-06-29 19:47:04 +00:00
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2009-09-24 22:14:03 +00:00
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static int config_compare(const config_t *a, const config_t *b) {
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2002-09-09 21:25:28 +00:00
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int result;
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2002-02-18 16:25:19 +00:00
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2002-09-09 21:25:28 +00:00
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result = strcasecmp(a->variable, b->variable);
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2002-02-18 16:25:19 +00:00
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2002-09-09 21:25:28 +00:00
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if(result)
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return result;
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2000-03-26 00:33:07 +00:00
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2002-09-09 21:25:28 +00:00
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result = a->line - b->line;
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2002-02-18 16:25:19 +00:00
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2002-09-09 21:25:28 +00:00
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if(result)
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return result;
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else
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return strcmp(a->file, b->file);
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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void init_configuration(avl_tree_t ** config_tree) {
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2002-09-09 21:25:28 +00:00
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*config_tree = avl_alloc_tree((avl_compare_t) config_compare, (avl_action_t) free_config);
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2001-10-10 20:34:27 +00:00
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}
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2000-10-16 16:33:30 +00:00
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2009-09-24 22:14:03 +00:00
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void exit_configuration(avl_tree_t ** config_tree) {
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2002-09-09 21:25:28 +00:00
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avl_delete_tree(*config_tree);
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*config_tree = NULL;
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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config_t *new_config(void) {
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2003-08-28 21:05:11 +00:00
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return xmalloc_and_zero(sizeof(config_t));
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2001-10-10 20:34:27 +00:00
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}
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2000-03-26 00:33:07 +00:00
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2009-09-24 22:14:03 +00:00
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void free_config(config_t *cfg) {
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2002-09-09 21:25:28 +00:00
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if(cfg->variable)
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free(cfg->variable);
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if(cfg->value)
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free(cfg->value);
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if(cfg->file)
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free(cfg->file);
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free(cfg);
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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void config_add(avl_tree_t *config_tree, config_t *cfg) {
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2002-09-09 21:25:28 +00:00
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avl_insert(config_tree, cfg);
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2001-10-10 20:34:27 +00:00
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}
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2000-06-30 11:45:16 +00:00
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2009-09-24 22:14:03 +00:00
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config_t *lookup_config(avl_tree_t *config_tree, char *variable) {
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2002-09-09 21:25:28 +00:00
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config_t cfg, *found;
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cfg.variable = variable;
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cfg.file = "";
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cfg.line = 0;
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2001-10-10 20:34:27 +00:00
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2002-09-09 21:25:28 +00:00
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found = avl_search_closest_greater(config_tree, &cfg);
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2001-10-27 15:19:13 +00:00
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2002-09-09 21:25:28 +00:00
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if(!found)
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return NULL;
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2002-02-18 16:25:19 +00:00
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2002-09-09 21:25:28 +00:00
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if(strcasecmp(found->variable, variable))
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return NULL;
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2001-10-27 15:19:13 +00:00
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2002-09-09 21:25:28 +00:00
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return found;
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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config_t *lookup_config_next(avl_tree_t *config_tree, const config_t *cfg) {
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2002-09-09 21:25:28 +00:00
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avl_node_t *node;
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config_t *found;
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node = avl_search_node(config_tree, cfg);
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if(node) {
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if(node->next) {
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2003-08-28 21:05:11 +00:00
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found = node->next->data;
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2002-09-09 21:25:28 +00:00
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if(!strcasecmp(found->variable, cfg->variable))
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return found;
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}
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}
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return NULL;
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2001-10-10 20:34:27 +00:00
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}
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2002-02-18 16:25:19 +00:00
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2009-09-24 22:14:03 +00:00
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bool get_config_bool(const config_t *cfg, bool *result) {
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2002-09-09 21:25:28 +00:00
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if(!cfg)
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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if(!strcasecmp(cfg->value, "yes")) {
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2003-07-22 20:55:21 +00:00
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*result = true;
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return true;
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2002-09-09 21:25:28 +00:00
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} else if(!strcasecmp(cfg->value, "no")) {
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2003-07-22 20:55:21 +00:00
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*result = false;
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return true;
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2002-09-09 21:25:28 +00:00
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}
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
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2002-09-09 21:25:28 +00:00
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cfg->variable, cfg->file, cfg->line);
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2003-07-22 20:55:21 +00:00
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return false;
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool get_config_int(const config_t *cfg, int *result) {
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2002-09-09 21:25:28 +00:00
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if(!cfg)
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2003-07-22 20:55:21 +00:00
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return false;
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2001-10-10 20:34:27 +00:00
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2002-09-09 21:25:28 +00:00
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if(sscanf(cfg->value, "%d", result) == 1)
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2003-07-22 20:55:21 +00:00
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return true;
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2002-02-18 16:25:19 +00:00
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
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2002-09-09 21:25:28 +00:00
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cfg->variable, cfg->file, cfg->line);
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2003-07-22 20:55:21 +00:00
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return false;
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool get_config_string(const config_t *cfg, char **result) {
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2002-09-09 21:25:28 +00:00
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if(!cfg)
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2003-07-22 20:55:21 +00:00
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return false;
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2001-10-10 20:34:27 +00:00
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2002-09-09 21:25:28 +00:00
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*result = xstrdup(cfg->value);
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2003-07-22 20:55:21 +00:00
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return true;
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2001-10-10 20:34:27 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool get_config_address(const config_t *cfg, struct addrinfo **result) {
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2002-09-09 21:25:28 +00:00
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struct addrinfo *ai;
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if(!cfg)
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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ai = str2addrinfo(cfg->value, NULL, 0);
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if(ai) {
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*result = ai;
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2003-07-22 20:55:21 +00:00
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return true;
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2002-09-09 21:25:28 +00:00
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}
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
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2002-09-09 21:25:28 +00:00
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cfg->variable, cfg->file, cfg->line);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-02-10 21:57:54 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool get_config_subnet(const config_t *cfg, subnet_t ** result) {
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2003-12-12 19:52:25 +00:00
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subnet_t subnet = {0};
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2002-09-09 21:25:28 +00:00
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if(!cfg)
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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2003-12-12 19:52:25 +00:00
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if(!str2net(&subnet, cfg->value)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Subnet expected for configuration variable %s in %s line %d",
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2002-09-09 21:25:28 +00:00
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cfg->variable, cfg->file, cfg->line);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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/* Teach newbies what subnets are... */
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2003-12-12 19:52:25 +00:00
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if(((subnet.type == SUBNET_IPV4)
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&& !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t)))
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|| ((subnet.type == SUBNET_IPV6)
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&& !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t)))) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d",
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2002-09-09 21:25:28 +00:00
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cfg->variable, cfg->file, cfg->line);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2003-12-12 19:52:25 +00:00
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*(*result = new_subnet()) = subnet;
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2002-09-09 21:25:28 +00:00
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2003-07-22 20:55:21 +00:00
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return true;
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2001-10-27 12:13:17 +00:00
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}
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2000-11-29 14:24:40 +00:00
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/*
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Read exactly one line and strip the trailing newline if any. If the
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file was on EOF, return NULL. Otherwise, return all the data in a
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dynamically allocated buffer.
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2002-02-18 16:25:19 +00:00
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2000-12-01 12:36:36 +00:00
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If line is non-NULL, it will be used as an initial buffer, to avoid
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unnecessary mallocing each time this function is called. If buf is
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given, and buf needs to be expanded, the var pointed to by buflen
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will be increased.
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2000-11-29 14:24:40 +00:00
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*/
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2009-09-24 22:14:03 +00:00
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static char *readline(FILE * fp, char **buf, size_t *buflen) {
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2002-09-09 21:25:28 +00:00
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char *newline = NULL;
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char *p;
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char *line; /* The array that contains everything that has been read so far */
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char *idx; /* Read into this pointer, which points to an offset within line */
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size_t size, newsize; /* The size of the current array pointed to by line */
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size_t maxlen; /* Maximum number of characters that may be read with fgets. This is newsize - oldsize. */
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if(feof(fp))
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return NULL;
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if(buf && buflen) {
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size = *buflen;
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line = *buf;
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} else {
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size = 100;
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line = xmalloc(size);
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2000-11-29 14:24:40 +00:00
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}
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2002-09-09 21:25:28 +00:00
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maxlen = size;
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idx = line;
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*idx = 0;
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for(;;) {
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errno = 0;
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p = fgets(idx, maxlen, fp);
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if(!p) { /* EOF or error */
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if(feof(fp))
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break;
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/* otherwise: error; let the calling function print an error message if applicable */
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free(line);
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return NULL;
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}
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newline = strchr(p, '\n');
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if(!newline) { /* We haven't yet read everything to the end of the line */
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newsize = size << 1;
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line = xrealloc(line, newsize);
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idx = &line[size - 1];
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maxlen = newsize - size + 1;
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size = newsize;
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} else {
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*newline = '\0'; /* kill newline */
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2009-01-20 13:20:44 +00:00
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if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */
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newline[-1] = '\0';
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2002-09-09 21:25:28 +00:00
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break; /* yay */
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}
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2000-11-29 14:24:40 +00:00
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}
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2002-09-09 21:25:28 +00:00
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if(buf && buflen) {
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*buflen = size;
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*buf = line;
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2000-11-29 14:24:40 +00:00
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}
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2002-09-09 21:25:28 +00:00
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return line;
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2000-11-29 14:24:40 +00:00
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}
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2000-03-26 00:33:07 +00:00
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/*
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2000-10-11 13:42:52 +00:00
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Parse a configuration file and put the results in the configuration tree
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starting at *base.
|
2000-03-26 00:33:07 +00:00
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*/
|
2009-09-24 22:14:03 +00:00
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int read_config_file(avl_tree_t *config_tree, const char *fname) {
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2002-09-09 21:25:28 +00:00
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int err = -2; /* Parse error */
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FILE *fp;
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char *buffer, *line;
|
2004-03-15 18:05:41 +00:00
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char *variable, *value, *eol;
|
2003-07-22 20:55:21 +00:00
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|
int lineno = 0;
|
2003-08-02 15:27:24 +00:00
|
|
|
int len;
|
2003-07-22 20:55:21 +00:00
|
|
|
bool ignore = false;
|
2002-09-09 21:25:28 +00:00
|
|
|
config_t *cfg;
|
|
|
|
size_t bufsize;
|
|
|
|
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
|
|
|
|
if(!fp) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Cannot open config file %s: %s", fname,
|
2002-09-09 21:25:28 +00:00
|
|
|
strerror(errno));
|
|
|
|
return -3;
|
2000-11-29 14:27:24 +00:00
|
|
|
}
|
2000-11-30 22:32:14 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
bufsize = 100;
|
|
|
|
buffer = xmalloc(bufsize);
|
|
|
|
|
|
|
|
for(;;) {
|
2008-10-25 18:10:08 +00:00
|
|
|
if(feof(fp)) {
|
|
|
|
err = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
line = readline(fp, &buffer, &bufsize);
|
|
|
|
|
|
|
|
if(!line) {
|
|
|
|
err = -1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
lineno++;
|
2000-05-15 18:28:45 +00:00
|
|
|
|
2003-08-08 14:59:27 +00:00
|
|
|
if(!*line || *line == '#')
|
2003-08-02 15:27:24 +00:00
|
|
|
continue;
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2003-08-02 15:27:24 +00:00
|
|
|
if(ignore) {
|
2003-08-02 21:34:10 +00:00
|
|
|
if(!strncmp(line, "-----END", 8))
|
2003-08-02 15:27:24 +00:00
|
|
|
ignore = false;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!strncmp(line, "-----BEGIN", 10)) {
|
2003-07-22 20:55:21 +00:00
|
|
|
ignore = true;
|
2003-08-02 15:27:24 +00:00
|
|
|
continue;
|
|
|
|
}
|
2002-09-09 19:40:12 +00:00
|
|
|
|
2003-08-02 15:27:24 +00:00
|
|
|
variable = value = line;
|
2001-01-13 16:36:23 +00:00
|
|
|
|
2004-03-15 18:05:41 +00:00
|
|
|
eol = line + strlen(line);
|
|
|
|
while(strchr("\t ", *--eol))
|
|
|
|
*eol = '\0';
|
|
|
|
|
2003-08-02 15:27:24 +00:00
|
|
|
len = strcspn(value, "\t =");
|
|
|
|
value += len;
|
|
|
|
value += strspn(value, "\t ");
|
|
|
|
if(*value == '=') {
|
|
|
|
value++;
|
|
|
|
value += strspn(value, "\t ");
|
|
|
|
}
|
|
|
|
variable[len] = '\0';
|
2001-01-13 16:36:23 +00:00
|
|
|
|
2004-03-15 18:05:41 +00:00
|
|
|
|
2003-08-02 15:27:24 +00:00
|
|
|
if(!*value) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "No value for variable `%s' on line %d while reading config file %s",
|
2003-08-02 15:27:24 +00:00
|
|
|
variable, lineno, fname);
|
|
|
|
break;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2000-03-26 00:33:07 +00:00
|
|
|
|
2003-08-02 15:27:24 +00:00
|
|
|
cfg = new_config();
|
|
|
|
cfg->variable = xstrdup(variable);
|
|
|
|
cfg->value = xstrdup(value);
|
|
|
|
cfg->file = xstrdup(fname);
|
|
|
|
cfg->line = lineno;
|
|
|
|
|
|
|
|
config_add(config_tree, cfg);
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
free(buffer);
|
|
|
|
fclose(fp);
|
|
|
|
|
|
|
|
return err;
|
2000-03-26 00:33:07 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool read_server_config() {
|
2002-09-09 21:25:28 +00:00
|
|
|
char *fname;
|
|
|
|
int x;
|
|
|
|
|
2009-09-08 16:18:36 +00:00
|
|
|
xasprintf(&fname, "%s/tinc.conf", confbase);
|
2002-09-09 21:25:28 +00:00
|
|
|
x = read_config_file(config_tree, fname);
|
|
|
|
|
|
|
|
if(x == -1) { /* System error: complain */
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
free(fname);
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
return x == 0;
|
2000-10-14 17:04:16 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
FILE *ask_and_open(const char *filename, const char *what) {
|
2002-09-09 21:25:28 +00:00
|
|
|
FILE *r;
|
|
|
|
char *directory;
|
|
|
|
char *fn;
|
|
|
|
|
|
|
|
/* Check stdin and stdout */
|
|
|
|
if(!isatty(0) || !isatty(1)) {
|
|
|
|
/* Argh, they are running us from a script or something. Write
|
|
|
|
the files to the current directory and let them burn in hell
|
|
|
|
for ever. */
|
|
|
|
fn = xstrdup(filename);
|
|
|
|
} else {
|
|
|
|
/* Ask for a file and/or directory name. */
|
2009-09-24 22:54:07 +00:00
|
|
|
fprintf(stdout, "Please enter a file to save %s to [%s]: ",
|
2002-09-09 21:25:28 +00:00
|
|
|
what, filename);
|
|
|
|
fflush(stdout);
|
|
|
|
|
|
|
|
fn = readline(stdin, NULL, NULL);
|
|
|
|
|
|
|
|
if(!fn) {
|
2009-09-24 22:54:07 +00:00
|
|
|
fprintf(stderr, "Error while reading stdin: %s\n",
|
2002-09-09 21:25:28 +00:00
|
|
|
strerror(errno));
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!strlen(fn))
|
|
|
|
/* User just pressed enter. */
|
|
|
|
fn = xstrdup(filename);
|
2000-11-29 14:24:40 +00:00
|
|
|
}
|
2001-01-05 23:53:53 +00:00
|
|
|
|
2003-08-08 12:24:52 +00:00
|
|
|
#ifdef HAVE_MINGW
|
|
|
|
if(fn[0] != '\\' && fn[0] != '/' && !strchr(fn, ':')) {
|
|
|
|
#else
|
|
|
|
if(fn[0] != '/') {
|
|
|
|
#endif
|
2002-09-09 21:25:28 +00:00
|
|
|
/* The directory is a relative path or a filename. */
|
|
|
|
char *p;
|
|
|
|
|
|
|
|
directory = get_current_dir_name();
|
2009-09-08 16:18:36 +00:00
|
|
|
xasprintf(&p, "%s/%s", directory, fn);
|
2002-09-09 21:25:28 +00:00
|
|
|
free(fn);
|
|
|
|
free(directory);
|
|
|
|
fn = p;
|
|
|
|
}
|
|
|
|
|
|
|
|
umask(0077); /* Disallow everything for group and other */
|
|
|
|
|
|
|
|
/* Open it first to keep the inode busy */
|
|
|
|
|
2009-02-03 13:54:45 +00:00
|
|
|
r = fopen(fn, "r+") ?: fopen(fn, "w+");
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
if(!r) {
|
2009-09-24 22:54:07 +00:00
|
|
|
fprintf(stderr, "Error opening file `%s': %s\n",
|
2002-09-09 21:25:28 +00:00
|
|
|
fn, strerror(errno));
|
|
|
|
free(fn);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
free(fn);
|
|
|
|
|
|
|
|
return r;
|
2000-11-28 23:12:57 +00:00
|
|
|
}
|
2009-02-03 13:54:45 +00:00
|
|
|
|
|
|
|
bool disable_old_keys(FILE *f) {
|
|
|
|
char buf[100];
|
|
|
|
long pos;
|
|
|
|
bool disabled = false;
|
|
|
|
|
|
|
|
rewind(f);
|
|
|
|
pos = ftell(f);
|
|
|
|
|
|
|
|
while(fgets(buf, sizeof buf, f)) {
|
|
|
|
if(!strncmp(buf, "-----BEGIN RSA", 14)) {
|
|
|
|
buf[11] = 'O';
|
|
|
|
buf[12] = 'L';
|
|
|
|
buf[13] = 'D';
|
|
|
|
fseek(f, pos, SEEK_SET);
|
|
|
|
fputs(buf, f);
|
|
|
|
disabled = true;
|
|
|
|
}
|
|
|
|
else if(!strncmp(buf, "-----END RSA", 12)) {
|
|
|
|
buf[ 9] = 'O';
|
|
|
|
buf[10] = 'L';
|
|
|
|
buf[11] = 'D';
|
|
|
|
fseek(f, pos, SEEK_SET);
|
|
|
|
fputs(buf, f);
|
|
|
|
disabled = true;
|
|
|
|
}
|
|
|
|
pos = ftell(f);
|
|
|
|
}
|
|
|
|
|
|
|
|
return disabled;
|
|
|
|
}
|