2 conf.c -- configuration code
3 Copyright (C) 1998 Robert van der Meulen
4 1998-2005 Ivo Timmermans
6 2010-2011 Julien Muchembled <jm@jmuchemb.eu>
7 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
8 2013 Florent Clairambault <florent@clairambault.fr>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (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 along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 #include "splay_tree.h"
28 #include "connection.h"
32 #include "netutl.h" /* for str2address */
34 #include "utils.h" /* for cp */
37 splay_tree_t *config_tree;
39 int pinginterval = 0; /* seconds between pings */
40 int pingtimeout = 0; /* seconds to wait for response */
41 list_t *cmdline_conf = NULL; /* global/host configuration values given at the command line */
43 static int config_compare(const config_t *a, const config_t *b) {
46 result = strcasecmp(a->variable, b->variable);
51 /* give priority to command line options */
52 result = !b->file - !a->file;
56 result = a->line - b->line;
61 return a->file ? strcmp(a->file, b->file) : 0;
64 void init_configuration(splay_tree_t ** config_tree) {
65 *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config);
68 void exit_configuration(splay_tree_t ** config_tree) {
69 splay_delete_tree(*config_tree);
73 config_t *new_config(void) {
74 return xzalloc(sizeof(config_t));
77 void free_config(config_t *cfg) {
90 void config_add(splay_tree_t *config_tree, config_t *cfg) {
91 splay_insert(config_tree, cfg);
94 config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
97 cfg.variable = variable;
101 found = splay_search_closest_greater(config_tree, &cfg);
106 if(strcasecmp(found->variable, variable))
112 config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *cfg) {
116 node = splay_search_node(config_tree, cfg);
120 found = node->next->data;
122 if(!strcasecmp(found->variable, cfg->variable))
130 bool get_config_bool(const config_t *cfg, bool *result) {
134 if(!strcasecmp(cfg->value, "yes")) {
137 } else if(!strcasecmp(cfg->value, "no")) {
142 logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
143 cfg->variable, cfg->file, cfg->line);
148 bool get_config_int(const config_t *cfg, int *result) {
152 if(sscanf(cfg->value, "%d", result) == 1)
155 logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
156 cfg->variable, cfg->file, cfg->line);
161 bool get_config_string(const config_t *cfg, char **result) {
165 *result = xstrdup(cfg->value);
170 bool get_config_address(const config_t *cfg, struct addrinfo **result) {
176 ai = str2addrinfo(cfg->value, NULL, 0);
183 logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
184 cfg->variable, cfg->file, cfg->line);
190 Read exactly one line and strip the trailing newline if any.
192 static char *readline(FILE * fp, char *buf, size_t buflen) {
193 char *newline = NULL;
199 p = fgets(buf, buflen, fp);
204 newline = strchr(p, '\n');
209 /* kill newline and carriage return if necessary */
211 if(newline > p && newline[-1] == '\r')
217 config_t *parse_config_line(char *line, const char *fname, int lineno) {
220 char *variable, *value, *eol;
221 variable = value = line;
223 eol = line + strlen(line);
224 while(strchr("\t ", *--eol))
227 len = strcspn(value, "\t =");
229 value += strspn(value, "\t ");
232 value += strspn(value, "\t ");
234 variable[len] = '\0';
237 const char err[] = "No value for variable";
239 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s",
240 err, variable, lineno, fname);
242 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' in command line option %d",
243 err, variable, lineno);
248 cfg->variable = xstrdup(variable);
249 cfg->value = xstrdup(value);
250 cfg->file = fname ? xstrdup(fname) : NULL;
257 Parse a configuration file and put the results in the configuration tree
260 bool read_config_file(splay_tree_t *config_tree, const char *fname) {
262 char buffer[MAX_STRING_SIZE];
269 fp = fopen(fname, "r");
272 logger(DEBUG_ALWAYS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
277 line = readline(fp, buffer, sizeof buffer);
287 if(!*line || *line == '#')
291 if(!strncmp(line, "-----END", 8))
296 if(!strncmp(line, "-----BEGIN", 10)) {
301 cfg = parse_config_line(line, fname, lineno);
304 config_add(config_tree, cfg);
312 void read_config_options(splay_tree_t *config_tree, const char *prefix) {
313 size_t prefix_len = prefix ? strlen(prefix) : 0;
315 for(const list_node_t *node = cmdline_conf->tail; node; node = node->prev) {
316 const config_t *cfg = node->data;
320 if(strchr(cfg->variable, '.'))
323 if(strncmp(prefix, cfg->variable, prefix_len) ||
324 cfg->variable[prefix_len] != '.')
330 new->variable = xstrdup(cfg->variable + prefix_len + 1);
332 new->variable = xstrdup(cfg->variable);
333 new->value = xstrdup(cfg->value);
335 new->line = cfg->line;
337 config_add(config_tree, new);
341 bool read_server_config(void) {
345 //read_config_options(config_tree, NULL);
347 xasprintf(&fname, "%s" SLASH "tinc.conf", confbase);
349 x = read_config_file(config_tree, fname);
351 // We will try to read the conf files in the "conf.d" dir
354 xasprintf(&dname, "%s" SLASH "conf.d", confbase);
355 DIR *dir = opendir (dname);
356 // If we can find this dir
359 // We list all the files in it
360 while (x && (ep = readdir (dir))) {
361 size_t l = strlen(ep->d_name);
362 // And we try to read the ones that end with ".conf"
363 if (l > 5 && !strcmp(".conf", & ep->d_name[ l - 5 ])) {
365 xasprintf(&fname, "%s" SLASH "%s", dname, ep->d_name);
366 x = read_config_file(config_tree, fname);
375 logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
382 bool read_host_config(splay_tree_t *config_tree, const char *name) {
386 //read_config_options(config_tree, name);
388 xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
389 x = read_config_file(config_tree, fname);
395 bool append_config_file(const char *name, const char *key, const char *value) {
397 xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
399 FILE *fp = fopen(fname, "a");
402 logger(DEBUG_ALWAYS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
404 fprintf(fp, "\n# The following line was automatically added by tinc\n%s = %s\n", key, value);