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 2000-2015 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 */
35 #include "utils.h" /* for cp */
38 splay_tree_t *config_tree;
40 int pinginterval = 0; /* seconds between pings */
41 int pingtimeout = 0; /* seconds to wait for response */
42 list_t *cmdline_conf = NULL; /* global/host configuration values given at the command line */
44 static int config_compare(const config_t *a, const config_t *b) {
47 result = strcasecmp(a->variable, b->variable);
53 /* give priority to command line options */
54 result = !b->file - !a->file;
60 result = a->line - b->line;
65 return a->file ? strcmp(a->file, b->file) : 0;
69 void init_configuration(splay_tree_t **config_tree) {
70 *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config);
73 void exit_configuration(splay_tree_t **config_tree) {
74 splay_delete_tree(*config_tree);
78 config_t *new_config(void) {
79 return xzalloc(sizeof(config_t));
82 void free_config(config_t *cfg) {
98 void config_add(splay_tree_t *config_tree, config_t *cfg) {
99 splay_insert(config_tree, cfg);
102 config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
103 config_t cfg, *found;
105 cfg.variable = variable;
109 found = splay_search_closest_greater(config_tree, &cfg);
115 if(strcasecmp(found->variable, variable)) {
122 config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *cfg) {
126 node = splay_search_node(config_tree, cfg);
130 found = node->next->data;
132 if(!strcasecmp(found->variable, cfg->variable)) {
141 bool get_config_bool(const config_t *cfg, bool *result) {
146 if(!strcasecmp(cfg->value, "yes")) {
149 } else if(!strcasecmp(cfg->value, "no")) {
154 logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
155 cfg->variable, cfg->file, cfg->line);
160 bool get_config_int(const config_t *cfg, int *result) {
165 if(sscanf(cfg->value, "%d", result) == 1) {
169 logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
170 cfg->variable, cfg->file, cfg->line);
175 bool get_config_string(const config_t *cfg, char **result) {
180 *result = xstrdup(cfg->value);
185 bool get_config_address(const config_t *cfg, struct addrinfo **result) {
192 ai = str2addrinfo(cfg->value, NULL, 0);
199 logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
200 cfg->variable, cfg->file, cfg->line);
205 bool get_config_subnet(const config_t *cfg, subnet_t **result) {
206 subnet_t subnet = {NULL};
212 if(!str2net(&subnet, cfg->value)) {
213 logger(DEBUG_ALWAYS, LOG_ERR, "Subnet expected for configuration variable %s in %s line %d",
214 cfg->variable, cfg->file, cfg->line);
218 /* Teach newbies what subnets are... */
220 if(((subnet.type == SUBNET_IPV4)
221 && !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(subnet.net.ipv4.address)))
222 || ((subnet.type == SUBNET_IPV6)
223 && !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(subnet.net.ipv6.address)))) {
224 logger(DEBUG_ALWAYS, LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d",
225 cfg->variable, cfg->file, cfg->line);
229 *(*result = new_subnet()) = subnet;
235 Read exactly one line and strip the trailing newline if any.
237 static char *readline(FILE *fp, char *buf, size_t buflen) {
238 char *newline = NULL;
245 p = fgets(buf, buflen, fp);
251 newline = strchr(p, '\n');
257 /* kill newline and carriage return if necessary */
260 if(newline > p && newline[-1] == '\r') {
267 config_t *parse_config_line(char *line, const char *fname, int lineno) {
270 char *variable, *value, *eol;
271 variable = value = line;
273 eol = line + strlen(line);
275 while(strchr("\t ", *--eol)) {
279 len = strcspn(value, "\t =");
281 value += strspn(value, "\t ");
285 value += strspn(value, "\t ");
288 variable[len] = '\0';
291 const char err[] = "No value for variable";
294 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s",
295 err, variable, lineno, fname);
297 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' in command line option %d",
298 err, variable, lineno);
304 cfg->variable = xstrdup(variable);
305 cfg->value = xstrdup(value);
306 cfg->file = fname ? xstrdup(fname) : NULL;
313 Parse a configuration file and put the results in the configuration tree
316 bool read_config_file(splay_tree_t *config_tree, const char *fname, bool verbose) {
318 char buffer[MAX_STRING_SIZE];
325 fp = fopen(fname, "r");
328 logger(verbose ? DEBUG_ALWAYS : DEBUG_CONNECTIONS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
333 line = readline(fp, buffer, sizeof(buffer));
345 if(!*line || *line == '#') {
350 if(!strncmp(line, "-----END", 8)) {
357 if(!strncmp(line, "-----BEGIN", 10)) {
362 cfg = parse_config_line(line, fname, lineno);
368 config_add(config_tree, cfg);
376 void read_config_options(splay_tree_t *config_tree, const char *prefix) {
377 size_t prefix_len = prefix ? strlen(prefix) : 0;
379 for(const list_node_t *node = cmdline_conf->tail; node; node = node->prev) {
380 const config_t *cfg = node->data;
384 if(strchr(cfg->variable, '.')) {
388 if(strncmp(prefix, cfg->variable, prefix_len) ||
389 cfg->variable[prefix_len] != '.') {
397 new->variable = xstrdup(cfg->variable + prefix_len + 1);
399 new->variable = xstrdup(cfg->variable);
402 new->value = xstrdup(cfg->value);
404 new->line = cfg->line;
406 config_add(config_tree, new);
410 bool read_server_config(void) {
411 char fname[PATH_MAX];
414 read_config_options(config_tree, NULL);
416 snprintf(fname, sizeof(fname), "%s" SLASH "tinc.conf", confbase);
418 x = read_config_file(config_tree, fname, true);
420 // We will try to read the conf files in the "conf.d" dir
422 char dname[PATH_MAX];
423 snprintf(dname, sizeof(dname), "%s" SLASH "conf.d", confbase);
424 DIR *dir = opendir(dname);
426 // If we can find this dir
430 // We list all the files in it
431 while(x && (ep = readdir(dir))) {
432 size_t l = strlen(ep->d_name);
434 // And we try to read the ones that end with ".conf"
435 if(l > 5 && !strcmp(".conf", & ep->d_name[ l - 5 ])) {
436 snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ep->d_name);
437 x = read_config_file(config_tree, fname, true);
446 logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
452 bool read_host_config(splay_tree_t *config_tree, const char *name, bool verbose) {
453 read_config_options(config_tree, name);
455 char fname[PATH_MAX];
456 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
457 return read_config_file(config_tree, fname, verbose);
460 bool append_config_file(const char *name, const char *key, const char *value) {
461 char fname[PATH_MAX];
462 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
464 FILE *fp = fopen(fname, "a");
467 logger(DEBUG_ALWAYS, LOG_DEBUG, "Cannot open config file %s: %s", fname, strerror(errno));
471 fprintf(fp, "\n# The following line was automatically added by tinc\n%s = %s\n", key, value);