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) {
89 void config_add(splay_tree_t *config_tree, config_t *cfg) {
90 splay_insert(config_tree, cfg);
93 config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
96 cfg.variable = variable;
100 found = splay_search_closest_greater(config_tree, &cfg);
106 if(strcasecmp(found->variable, variable)) {
113 config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *cfg) {
117 node = splay_search_node(config_tree, cfg);
121 found = node->next->data;
123 if(!strcasecmp(found->variable, cfg->variable)) {
132 bool get_config_bool(const config_t *cfg, bool *result) {
137 if(!strcasecmp(cfg->value, "yes")) {
140 } else if(!strcasecmp(cfg->value, "no")) {
145 logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
146 cfg->variable, cfg->file, cfg->line);
151 bool get_config_int(const config_t *cfg, int *result) {
156 if(sscanf(cfg->value, "%d", result) == 1) {
160 logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
161 cfg->variable, cfg->file, cfg->line);
166 bool get_config_string(const config_t *cfg, char **result) {
171 *result = xstrdup(cfg->value);
176 bool get_config_address(const config_t *cfg, struct addrinfo **result) {
183 ai = str2addrinfo(cfg->value, NULL, 0);
190 logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
191 cfg->variable, cfg->file, cfg->line);
196 bool get_config_subnet(const config_t *cfg, subnet_t **result) {
197 subnet_t subnet = {0};
203 if(!str2net(&subnet, cfg->value)) {
204 logger(DEBUG_ALWAYS, LOG_ERR, "Subnet expected for configuration variable %s in %s line %d",
205 cfg->variable, cfg->file, cfg->line);
209 if(subnetcheck(subnet)) {
210 *(*result = new_subnet()) = subnet;
214 logger(DEBUG_ALWAYS, LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d",
215 cfg->variable, cfg->file, cfg->line);
220 Read exactly one line and strip the trailing newline if any.
222 static char *readline(FILE *fp, char *buf, size_t buflen) {
223 char *newline = NULL;
230 p = fgets(buf, buflen, fp);
236 newline = strchr(p, '\n');
242 /* kill newline and carriage return if necessary */
245 if(newline > p && newline[-1] == '\r') {
252 config_t *parse_config_line(char *line, const char *fname, int lineno) {
255 char *variable, *value, *eol;
256 variable = value = line;
258 eol = line + strlen(line);
260 while(strchr("\t ", *--eol)) {
264 len = strcspn(value, "\t =");
266 value += strspn(value, "\t ");
270 value += strspn(value, "\t ");
273 variable[len] = '\0';
276 const char err[] = "No value for variable";
279 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s",
280 err, variable, lineno, fname);
282 logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' in command line option %d",
283 err, variable, lineno);
289 cfg->variable = xstrdup(variable);
290 cfg->value = xstrdup(value);
291 cfg->file = fname ? xstrdup(fname) : NULL;
298 Parse a configuration file and put the results in the configuration tree
301 bool read_config_file(splay_tree_t *config_tree, const char *fname, bool verbose) {
303 char buffer[MAX_STRING_SIZE];
310 fp = fopen(fname, "r");
313 logger(verbose ? DEBUG_ALWAYS : DEBUG_CONNECTIONS, LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
318 line = readline(fp, buffer, sizeof(buffer));
330 if(!*line || *line == '#') {
335 if(!strncmp(line, "-----END", 8)) {
342 if(!strncmp(line, "-----BEGIN", 10)) {
347 cfg = parse_config_line(line, fname, lineno);
353 config_add(config_tree, cfg);
361 void read_config_options(splay_tree_t *config_tree, const char *prefix) {
362 size_t prefix_len = prefix ? strlen(prefix) : 0;
364 for(const list_node_t *node = cmdline_conf->tail; node; node = node->prev) {
365 const config_t *cfg = node->data;
369 if(strchr(cfg->variable, '.')) {
373 if(strncmp(prefix, cfg->variable, prefix_len) ||
374 cfg->variable[prefix_len] != '.') {
382 new->variable = xstrdup(cfg->variable + prefix_len + 1);
384 new->variable = xstrdup(cfg->variable);
387 new->value = xstrdup(cfg->value);
389 new->line = cfg->line;
391 config_add(config_tree, new);
395 bool read_server_config(void) {
396 char fname[PATH_MAX];
399 read_config_options(config_tree, NULL);
401 snprintf(fname, sizeof(fname), "%s" SLASH "tinc.conf", confbase);
403 x = read_config_file(config_tree, fname, true);
405 // We will try to read the conf files in the "conf.d" dir
407 char dname[PATH_MAX];
408 snprintf(dname, sizeof(dname), "%s" SLASH "conf.d", confbase);
409 DIR *dir = opendir(dname);
411 // If we can find this dir
415 // We list all the files in it
416 while(x && (ep = readdir(dir))) {
417 size_t l = strlen(ep->d_name);
419 // And we try to read the ones that end with ".conf"
420 if(l > 5 && !strcmp(".conf", & ep->d_name[ l - 5 ])) {
421 if((size_t)snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ep->d_name) >= sizeof(fname)) {
422 logger(DEBUG_ALWAYS, LOG_ERR, "Pathname too long: %s/%s", dname, ep->d_name);
426 x = read_config_file(config_tree, fname, true);
435 logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
441 bool read_host_config(splay_tree_t *config_tree, const char *name, bool verbose) {
442 read_config_options(config_tree, name);
444 char fname[PATH_MAX];
445 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
446 return read_config_file(config_tree, fname, verbose);
449 bool append_config_file(const char *name, const char *key, const char *value) {
450 char fname[PATH_MAX];
451 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
453 FILE *fp = fopen(fname, "a");
456 logger(DEBUG_ALWAYS, LOG_DEBUG, "Cannot open config file %s: %s", fname, strerror(errno));
460 fprintf(fp, "\n# The following line was automatically added by tinc\n%s = %s\n", key, value);