/*
conf.c -- configuration code
- Copyright (C) 1998 Robert van der Meulen
+ Copyright (C) 1998 Robert van der Meulen
1998-2005 Ivo Timmermans
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
- 2000 Cris van Pelt
+ 2000 Cris van Pelt
+ 2010-2011 Julien Muchembled <jm@jmuchemb.eu>
+ 2000-2015 Guus Sliepen <guus@tinc-vpn.org>
+ 2013 Florent Clairambault <florent@clairambault.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
#include "splay_tree.h"
+#include "connection.h"
#include "conf.h"
+#include "list.h"
#include "logger.h"
-#include "netutl.h" /* for str2address */
+#include "names.h"
+#include "netutl.h" /* for str2address */
#include "protocol.h"
-#include "utils.h" /* for cp */
+#include "utils.h" /* for cp */
#include "xalloc.h"
splay_tree_t *config_tree;
-int pinginterval = 0; /* seconds between pings */
-int pingtimeout = 0; /* seconds to wait for response */
-char *confbase = NULL; /* directory in which all config files are */
-char *netname = NULL; /* name of the vpn network */
+int pinginterval = 0; /* seconds between pings */
+int pingtimeout = 0; /* seconds to wait for response */
+list_t *cmdline_conf = NULL; /* global/host configuration values given at the command line */
static int config_compare(const config_t *a, const config_t *b) {
int result;
if(result)
return result;
+ /* give priority to command line options */
+ result = !b->file - !a->file;
+ if (result)
+ return result;
+
result = a->line - b->line;
if(result)
return result;
else
- return strcmp(a->file, b->file);
+ return a->file ? strcmp(a->file, b->file) : 0;
}
void init_configuration(splay_tree_t ** config_tree) {
}
config_t *new_config(void) {
- return xmalloc_and_zero(sizeof(config_t));
+ return xzalloc(sizeof(config_t));
}
void free_config(config_t *cfg) {
config_t cfg, *found;
cfg.variable = variable;
- cfg.file = "";
+ cfg.file = NULL;
cfg.line = 0;
found = splay_search_closest_greater(config_tree, &cfg);
return true;
}
- logger(LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
+ logger(DEBUG_ALWAYS, LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
cfg->variable, cfg->file, cfg->line);
return false;
if(sscanf(cfg->value, "%d", result) == 1)
return true;
- logger(LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
+ logger(DEBUG_ALWAYS, LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
cfg->variable, cfg->file, cfg->line);
return false;
return true;
}
- logger(LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
+ logger(DEBUG_ALWAYS, LOG_ERR, "Hostname or IP address expected for configuration variable %s in %s line %d",
cfg->variable, cfg->file, cfg->line);
return false;
}
bool get_config_subnet(const config_t *cfg, subnet_t ** result) {
- subnet_t subnet = {0};
+ subnet_t subnet = {NULL};
if(!cfg)
return false;
if(!str2net(&subnet, cfg->value)) {
- logger(LOG_ERR, "Subnet expected for configuration variable %s in %s line %d",
+ logger(DEBUG_ALWAYS, LOG_ERR, "Subnet expected for configuration variable %s in %s line %d",
cfg->variable, cfg->file, cfg->line);
return false;
}
&& !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof subnet.net.ipv4.address))
|| ((subnet.type == SUBNET_IPV6)
&& !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof subnet.net.ipv6.address))) {
- logger(LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d",
+ logger(DEBUG_ALWAYS, LOG_ERR, "Network address and prefix length do not match for configuration variable %s in %s line %d",
cfg->variable, cfg->file, cfg->line);
return false;
}
newline = strchr(p, '\n');
if(!newline)
- return NULL;
+ return buf;
- *newline = '\0'; /* kill newline */
- if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */
+ /* kill newline and carriage return if necessary */
+ *newline = '\0';
+ if(newline > p && newline[-1] == '\r')
newline[-1] = '\0';
return buf;
}
+config_t *parse_config_line(char *line, const char *fname, int lineno) {
+ config_t *cfg;
+ int len;
+ char *variable, *value, *eol;
+ variable = value = line;
+
+ eol = line + strlen(line);
+ while(strchr("\t ", *--eol))
+ *eol = '\0';
+
+ len = strcspn(value, "\t =");
+ value += len;
+ value += strspn(value, "\t ");
+ if(*value == '=') {
+ value++;
+ value += strspn(value, "\t ");
+ }
+ variable[len] = '\0';
+
+ if(!*value) {
+ const char err[] = "No value for variable";
+ if (fname)
+ logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' on line %d while reading config file %s",
+ err, variable, lineno, fname);
+ else
+ logger(DEBUG_ALWAYS, LOG_ERR, "%s `%s' in command line option %d",
+ err, variable, lineno);
+ return NULL;
+ }
+
+ cfg = new_config();
+ cfg->variable = xstrdup(variable);
+ cfg->value = xstrdup(value);
+ cfg->file = fname ? xstrdup(fname) : NULL;
+ cfg->line = lineno;
+
+ return cfg;
+}
+
/*
Parse a configuration file and put the results in the configuration tree
starting at *base.
*/
-int read_config_file(splay_tree_t *config_tree, const char *fname) {
- int err = -2; /* Parse error */
+bool read_config_file(splay_tree_t *config_tree, const char *fname) {
FILE *fp;
char buffer[MAX_STRING_SIZE];
char *line;
- char *variable, *value, *eol;
int lineno = 0;
- int len;
bool ignore = false;
config_t *cfg;
bool result = false;
fp = fopen(fname, "r");
if(!fp) {
- logger(LOG_ERR, "Cannot open config file %s: %s", fname, strerror(errno));
+ logger(DEBUG_ALWAYS, LOG_DEBUG, "Cannot open config file %s: %s", fname, strerror(errno));
return false;
}
ignore = false;
continue;
}
-
+
if(!strncmp(line, "-----BEGIN", 10)) {
ignore = true;
continue;
}
- variable = value = line;
-
- eol = line + strlen(line);
- while(strchr("\t ", *--eol))
- *eol = '\0';
-
- len = strcspn(value, "\t =");
- value += len;
- value += strspn(value, "\t ");
- if(*value == '=') {
- value++;
- value += strspn(value, "\t ");
- }
- variable[len] = '\0';
-
-
- if(!*value) {
- logger(LOG_ERR, "No value for variable `%s' on line %d while reading config file %s",
- variable, lineno, fname);
+ cfg = parse_config_line(line, fname, lineno);
+ if (!cfg)
break;
- }
-
- cfg = new_config();
- cfg->variable = xstrdup(variable);
- cfg->value = xstrdup(value);
- cfg->file = xstrdup(fname);
- cfg->line = lineno;
-
config_add(config_tree, cfg);
}
return result;
}
-bool read_server_config() {
- char *fname;
- bool x;
+void read_config_options(splay_tree_t *config_tree, const char *prefix) {
+ size_t prefix_len = prefix ? strlen(prefix) : 0;
- xasprintf(&fname, "%s/tinc.conf", confbase);
- x = read_config_file(config_tree, fname);
+ for(const list_node_t *node = cmdline_conf->tail; node; node = node->prev) {
+ const config_t *cfg = node->data;
+ config_t *new;
- if(!x) { /* System error: complain */
- logger(LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
- }
+ if(!prefix) {
+ if(strchr(cfg->variable, '.'))
+ continue;
+ } else {
+ if(strncmp(prefix, cfg->variable, prefix_len) ||
+ cfg->variable[prefix_len] != '.')
+ continue;
+ }
- free(fname);
+ new = new_config();
+ if(prefix)
+ new->variable = xstrdup(cfg->variable + prefix_len + 1);
+ else
+ new->variable = xstrdup(cfg->variable);
+ new->value = xstrdup(cfg->value);
+ new->file = NULL;
+ new->line = cfg->line;
- return x;
+ config_add(config_tree, new);
+ }
}
-FILE *ask_and_open(const char *filename, const char *what) {
- FILE *r;
- char *directory;
- char line[PATH_MAX];
- const char *fn;
-
- /* Check stdin and stdout */
- if(!isatty(0) || !isatty(1)) {
- /* Argh, they are running us from a script or something. Write
- the files to the current directory and let them burn in hell
- for ever. */
- fn = filename;
- } else {
- /* Ask for a file and/or directory name. */
- fprintf(stdout, "Please enter a file to save %s to [%s]: ",
- what, filename);
- fflush(stdout);
-
- fn = readline(stdin, line, sizeof line);
-
- if(!fn) {
- fprintf(stderr, "Error while reading stdin: %s\n",
- strerror(errno));
- return NULL;
- }
+bool read_server_config(void) {
+ char fname[PATH_MAX];
+ bool x;
- if(!strlen(fn))
- /* User just pressed enter. */
- fn = filename;
- }
+ read_config_options(config_tree, NULL);
+
+ snprintf(fname, sizeof fname, "%s" SLASH "tinc.conf", confbase);
+ errno = 0;
+ x = read_config_file(config_tree, fname);
-#ifdef HAVE_MINGW
- if(fn[0] != '\\' && fn[0] != '/' && !strchr(fn, ':')) {
-#else
- if(fn[0] != '/') {
-#endif
- /* The directory is a relative path or a filename. */
- char *p;
-
- directory = get_current_dir_name();
- xasprintf(&p, "%s/%s", directory, fn);
- free(directory);
- fn = p;
+ // We will try to read the conf files in the "conf.d" dir
+ if (x) {
+ char dname[PATH_MAX];
+ snprintf(dname, sizeof dname, "%s" SLASH "conf.d", confbase);
+ DIR *dir = opendir (dname);
+ // If we can find this dir
+ if (dir) {
+ struct dirent *ep;
+ // We list all the files in it
+ while (x && (ep = readdir (dir))) {
+ size_t l = strlen(ep->d_name);
+ // And we try to read the ones that end with ".conf"
+ if (l > 5 && !strcmp(".conf", & ep->d_name[ l - 5 ])) {
+ snprintf(fname, sizeof fname, "%s" SLASH "%s", dname, ep->d_name);
+ x = read_config_file(config_tree, fname);
+ }
+ }
+ closedir (dir);
+ }
}
- umask(0077); /* Disallow everything for group and other */
+ if(!x && errno)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
- /* Open it first to keep the inode busy */
+ return x;
+}
- r = fopen(fn, "r+") ?: fopen(fn, "w+");
+bool read_host_config(splay_tree_t *config_tree, const char *name) {
+ char fname[PATH_MAX];
+ bool x;
- if(!r) {
- fprintf(stderr, "Error opening file `%s': %s\n",
- fn, strerror(errno));
- return NULL;
- }
+ read_config_options(config_tree, name);
+
+ snprintf(fname, sizeof fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ x = read_config_file(config_tree, fname);
- return r;
+ return x;
}
-bool disable_old_keys(FILE *f) {
- char buf[100];
- long pos;
- bool disabled = false;
-
- rewind(f);
- pos = ftell(f);
-
- while(fgets(buf, sizeof buf, f)) {
- if(!strncmp(buf, "-----BEGIN RSA", 14)) {
- buf[11] = 'O';
- buf[12] = 'L';
- buf[13] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
- disabled = true;
- }
- else if(!strncmp(buf, "-----END RSA", 12)) {
- buf[ 9] = 'O';
- buf[10] = 'L';
- buf[11] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
- disabled = true;
- }
- pos = ftell(f);
+bool append_config_file(const char *name, const char *key, const char *value) {
+ char fname[PATH_MAX];
+ snprintf(fname, sizeof fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+
+ FILE *fp = fopen(fname, "a");
+
+ if(!fp) {
+ logger(DEBUG_ALWAYS, LOG_DEBUG, "Cannot open config file %s: %s", fname, strerror(errno));
+ return false;
}
- return disabled;
+ fprintf(fp, "\n# The following line was automatically added by tinc\n%s = %s\n", key, value);
+ fclose(fp);
+ return true;
}
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