2 conf.c -- configuration code
3 Copyright (C) 1998 Robert van der Meulen
4 1998-2003 Ivo Timmermans <ivo@o2w.nl>
5 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
6 2000 Cris van Pelt <tribbel@arise.dhs.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 $Id: conf.c,v 1.9.4.76 2003/08/28 21:05:10 guus Exp $
30 #include "netutl.h" /* for str2address */
31 #include "utils.h" /* for cp */
34 avl_tree_t *config_tree;
36 int pingtimeout = 0; /* seconds before timeout */
37 char *confbase = NULL; /* directory in which all config files are */
38 char *netname = NULL; /* name of the vpn network */
40 static int config_compare(const config_t *a, const config_t *b)
44 result = strcasecmp(a->variable, b->variable);
49 result = a->line - b->line;
54 return strcmp(a->file, b->file);
57 void init_configuration(avl_tree_t ** config_tree)
61 *config_tree = avl_alloc_tree((avl_compare_t) config_compare, (avl_action_t) free_config);
64 void exit_configuration(avl_tree_t ** config_tree)
68 avl_delete_tree(*config_tree);
72 config_t *new_config(void)
76 return xmalloc_and_zero(sizeof(config_t));
79 void free_config(config_t *cfg)
95 void config_add(avl_tree_t *config_tree, config_t *cfg)
99 avl_insert(config_tree, cfg);
102 config_t *lookup_config(const avl_tree_t *config_tree, char *variable)
104 config_t cfg, *found;
108 cfg.variable = variable;
112 found = avl_search_closest_greater(config_tree, &cfg);
117 if(strcasecmp(found->variable, variable))
123 config_t *lookup_config_next(const avl_tree_t *config_tree, const config_t *cfg)
130 node = avl_search_node(config_tree, cfg);
134 found = node->next->data;
136 if(!strcasecmp(found->variable, cfg->variable))
144 bool get_config_bool(const config_t *cfg, bool *result)
151 if(!strcasecmp(cfg->value, "yes")) {
154 } else if(!strcasecmp(cfg->value, "no")) {
159 logger(LOG_ERR, _("\"yes\" or \"no\" expected for configuration variable %s in %s line %d"),
160 cfg->variable, cfg->file, cfg->line);
165 bool get_config_int(const config_t *cfg, int *result)
172 if(sscanf(cfg->value, "%d", result) == 1)
175 logger(LOG_ERR, _("Integer expected for configuration variable %s in %s line %d"),
176 cfg->variable, cfg->file, cfg->line);
181 bool get_config_string(const config_t *cfg, char **result)
188 *result = xstrdup(cfg->value);
193 bool get_config_address(const config_t *cfg, struct addrinfo **result)
202 ai = str2addrinfo(cfg->value, NULL, 0);
209 logger(LOG_ERR, _("Hostname or IP address expected for configuration variable %s in %s line %d"),
210 cfg->variable, cfg->file, cfg->line);
215 bool get_config_subnet(const config_t *cfg, subnet_t ** result)
224 subnet = str2net(cfg->value);
227 logger(LOG_ERR, _("Subnet expected for configuration variable %s in %s line %d"),
228 cfg->variable, cfg->file, cfg->line);
232 /* Teach newbies what subnets are... */
234 if(((subnet->type == SUBNET_IPV4)
235 && !maskcheck(&subnet->net.ipv4.address, subnet->net.ipv4.prefixlength, sizeof(ipv4_t)))
236 || ((subnet->type == SUBNET_IPV6)
237 && !maskcheck(&subnet->net.ipv6.address, subnet->net.ipv6.prefixlength, sizeof(ipv6_t)))) {
238 logger(LOG_ERR, _ ("Network address and prefix length do not match for configuration variable %s in %s line %d"),
239 cfg->variable, cfg->file, cfg->line);
250 Read exactly one line and strip the trailing newline if any. If the
251 file was on EOF, return NULL. Otherwise, return all the data in a
252 dynamically allocated buffer.
254 If line is non-NULL, it will be used as an initial buffer, to avoid
255 unnecessary mallocing each time this function is called. If buf is
256 given, and buf needs to be expanded, the var pointed to by buflen
259 static char *readline(FILE * fp, char **buf, size_t *buflen)
261 char *newline = NULL;
263 char *line; /* The array that contains everything that has been read so far */
264 char *idx; /* Read into this pointer, which points to an offset within line */
265 size_t size, newsize; /* The size of the current array pointed to by line */
266 size_t maxlen; /* Maximum number of characters that may be read with fgets. This is newsize - oldsize. */
276 line = xmalloc(size);
285 p = fgets(idx, maxlen, fp);
287 if(!p) { /* EOF or error */
291 /* otherwise: error; let the calling function print an error message if applicable */
296 newline = strchr(p, '\n');
298 if(!newline) { /* We haven't yet read everything to the end of the line */
300 line = xrealloc(line, newsize);
301 idx = &line[size - 1];
302 maxlen = newsize - size + 1;
305 *newline = '\0'; /* kill newline */
319 Parse a configuration file and put the results in the configuration tree
322 int read_config_file(avl_tree_t *config_tree, const char *fname)
324 int err = -2; /* Parse error */
327 char *variable, *value;
336 fp = fopen(fname, "r");
339 logger(LOG_ERR, _("Cannot open config file %s: %s"), fname,
345 buffer = xmalloc(bufsize);
348 line = readline(fp, &buffer, &bufsize);
362 if(!*line || *line == '#')
366 if(!strncmp(line, "-----END", 8))
371 if(!strncmp(line, "-----BEGIN", 10)) {
376 variable = value = line;
378 len = strcspn(value, "\t =");
380 value += strspn(value, "\t ");
383 value += strspn(value, "\t ");
385 variable[len] = '\0';
388 logger(LOG_ERR, _("No value for variable `%s' on line %d while reading config file %s"),
389 variable, lineno, fname);
394 cfg->variable = xstrdup(variable);
395 cfg->value = xstrdup(value);
396 cfg->file = xstrdup(fname);
399 config_add(config_tree, cfg);
408 bool read_server_config()
415 asprintf(&fname, "%s/tinc.conf", confbase);
416 x = read_config_file(config_tree, fname);
418 if(x == -1) { /* System error: complain */
419 logger(LOG_ERR, _("Failed to read `%s': %s"), fname, strerror(errno));
427 FILE *ask_and_open(const char *filename, const char *what, const char *mode)
433 /* Check stdin and stdout */
434 if(!isatty(0) || !isatty(1)) {
435 /* Argh, they are running us from a script or something. Write
436 the files to the current directory and let them burn in hell
438 fn = xstrdup(filename);
440 /* Ask for a file and/or directory name. */
441 fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
445 fn = readline(stdin, NULL, NULL);
448 fprintf(stderr, _("Error while reading stdin: %s\n"),
454 /* User just pressed enter. */
455 fn = xstrdup(filename);
459 if(fn[0] != '\\' && fn[0] != '/' && !strchr(fn, ':')) {
463 /* The directory is a relative path or a filename. */
466 directory = get_current_dir_name();
467 asprintf(&p, "%s/%s", directory, fn);
473 umask(0077); /* Disallow everything for group and other */
475 /* Open it first to keep the inode busy */
480 fprintf(stderr, _("Error opening file `%s': %s\n"),
481 fn, strerror(errno));