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 2000-2021 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"
33 #include "netutl.h" /* for str2address */
37 splay_tree_t *config_tree = NULL;
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);
52 /* give priority to command line options */
53 result = !b->file - !a->file;
59 result = a->line - b->line;
64 return a->file ? strcmp(a->file, b->file) : 0;
68 void init_configuration(splay_tree_t **config_tree) {
69 *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config);
72 void exit_configuration(splay_tree_t **config_tree) {
73 splay_delete_tree(*config_tree);
77 config_t *new_config(void) {
78 return xzalloc(sizeof(config_t));
81 void free_config(config_t *cfg) {
88 void config_add(splay_tree_t *config_tree, config_t *cfg) {
89 splay_insert(config_tree, cfg);
92 config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
95 cfg.variable = variable;
99 found = splay_search_closest_greater(config_tree, &cfg);
105 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)) {
131 bool get_config_bool(const config_t *cfg, bool *result) {
136 if(!strcasecmp(cfg->value, "yes")) {
139 } else if(!strcasecmp(cfg->value, "no")) {
144 logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
145 cfg->variable, cfg->file, cfg->line);
150 bool get_config_int(const config_t *cfg, int *result) {
155 if(sscanf(cfg->value, "%d", result) == 1) {
159 logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
160 cfg->variable, cfg->file, cfg->line);
165 bool get_config_string(const config_t *cfg, char **result) {
170 *result = xstrdup(cfg->value);
175 bool get_config_address(const config_t *cfg, struct addrinfo **result) {
182 ai = str2addrinfo(cfg->value, NULL, 0);
189 logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
190 cfg->variable, cfg->file, cfg->line);
196 Read exactly one line and strip the trailing newline if any.
198 static char *readline(FILE *fp, char *buf, size_t buflen) {
199 char *newline = NULL;
206 p = fgets(buf, buflen, fp);
212 newline = strchr(p, '\n');
218 /* kill newline and carriage return if necessary */
221 if(newline > p && newline[-1] == '\r') {
228 config_t *parse_config_line(char *line, const char *fname, int lineno) {
231 char *variable, *value, *eol;
232 variable = value = line;
234 eol = line + strlen(line);
236 while(strchr("\t ", *--eol)) {
240 len = strcspn(value, "\t =");
242 value += strspn(value, "\t ");
246 value += strspn(value, "\t ");
249 variable[len] = '\0';
252 const char err[] = "No value for variable";
255 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s",
256 err, variable, lineno, fname);
258 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' in command line option %d",
259 err, variable, lineno);
265 cfg->variable = xstrdup(variable);
266 cfg->value = xstrdup(value);
267 cfg->file = fname ? xstrdup(fname) : NULL;
274 Parse a configuration file and put the results in the configuration tree
277 bool read_config_file(splay_tree_t *config_tree, const char *fname, bool verbose) {
279 char buffer[MAX_STRING_SIZE];
286 fp = fopen(fname, "r");
289 logger(verbose ? DEBUG_ALWAYS : DEBUG_CONNECTIONS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
294 line = readline(fp, buffer, sizeof(buffer));
306 if(!*line || *line == '#') {
311 if(!strncmp(line, "-----END", 8)) {
318 if(!strncmp(line, "-----BEGIN", 10)) {
323 cfg = parse_config_line(line, fname, lineno);
329 config_add(config_tree, cfg);
337 void read_config_options(splay_tree_t *config_tree, const char *prefix) {
342 size_t prefix_len = prefix ? strlen(prefix) : 0;
344 for(const list_node_t *node = cmdline_conf->tail; node; node = node->prev) {
345 const config_t *cfg = node->data;
349 if(strchr(cfg->variable, '.')) {
353 if(strncmp(prefix, cfg->variable, prefix_len) ||
354 cfg->variable[prefix_len] != '.') {
362 new->variable = xstrdup(cfg->variable + prefix_len + 1);
364 new->variable = xstrdup(cfg->variable);
367 new->value = xstrdup(cfg->value);
369 new->line = cfg->line;
371 config_add(config_tree, new);
375 bool read_server_config(splay_tree_t *config_tree) {
376 char fname[PATH_MAX];
379 read_config_options(config_tree, NULL);
381 snprintf(fname, sizeof(fname), "%s" SLASH "tinc.conf", confbase);
383 x = read_config_file(config_tree, fname, true);
385 // We will try to read the conf files in the "conf.d" dir
387 char dname[PATH_MAX];
388 snprintf(dname, sizeof(dname), "%s" SLASH "conf.d", confbase);
389 DIR *dir = opendir(dname);
391 // If we can find this dir
395 // We list all the files in it
396 while(x && (ep = readdir(dir))) {
397 size_t l = strlen(ep->d_name);
399 // And we try to read the ones that end with ".conf"
400 if(l > 5 && !strcmp(".conf", & ep->d_name[ l - 5 ])) {
401 if((size_t)snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ep->d_name) >= sizeof(fname)) {
402 logger(DEBUG_ALWAYS, LOG_ERR, "Pathname too long: %s/%s", dname, ep->d_name);
406 x = read_config_file(config_tree, fname, true);
415 logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
421 bool read_host_config(splay_tree_t *config_tree, const char *name, bool verbose) {
422 read_config_options(config_tree, name);
424 char fname[PATH_MAX];
425 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
426 return read_config_file(config_tree, fname, verbose);
429 bool append_config_file(const char *name, const char *key, const char *value) {
430 char fname[PATH_MAX];
431 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
433 FILE *fp = fopen(fname, "a");
436 logger(DEBUG_ALWAYS, LOG_DEBUG, "Cannot open config file %s: %s", fname, strerror(errno));
440 fprintf(fp, "\n# The following line was automatically added by tinc\n%s = %s\n", key, value);