/*
conf.c -- configuration code
Copyright (C) 1998 Robert van der Meulen
- 1998-2002 Ivo Timmermans <ivo@o2w.nl>
- 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
- 2000 Cris van Pelt <tribbel@arise.dhs.org>
+ 1998-2005 Ivo Timmermans
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000 Cris van Pelt
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: conf.c,v 1.9.4.61 2002/09/15 12:26:24 guus Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <ctype.h>
-#include <errno.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
-
-#include <xalloc.h>
-#include <utils.h> /* for cp */
-#include <avl_tree.h>
+#include "system.h"
+#include "splay_tree.h"
#include "conf.h"
+#include "logger.h"
#include "netutl.h" /* for str2address */
+#include "utils.h" /* for cp */
+#include "xalloc.h"
-#include "system.h"
-
-avl_tree_t *config_tree;
+splay_tree_t *config_tree;
-int debug_lvl = 0;
-int pingtimeout = 0; /* seconds before timeout */
+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 config_compare(config_t *a, config_t *b)
-{
+static int config_compare(const config_t *a, const config_t *b) {
int result;
result = strcasecmp(a->variable, b->variable);
return strcmp(a->file, b->file);
}
-void init_configuration(avl_tree_t ** config_tree)
-{
+void init_configuration(splay_tree_t ** config_tree) {
cp();
- *config_tree = avl_alloc_tree((avl_compare_t) config_compare, (avl_action_t) free_config);
+ *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config);
}
-void exit_configuration(avl_tree_t ** config_tree)
-{
+void exit_configuration(splay_tree_t ** config_tree) {
cp();
- avl_delete_tree(*config_tree);
+ splay_delete_tree(*config_tree);
*config_tree = NULL;
}
-config_t *new_config(void)
-{
+config_t *new_config(void) {
cp();
- return (config_t *) xmalloc_and_zero(sizeof(config_t));
+ return xmalloc_and_zero(sizeof(config_t));
}
-void free_config(config_t *cfg)
-{
+void free_config(config_t *cfg) {
cp();
if(cfg->variable)
free(cfg);
}
-void config_add(avl_tree_t *config_tree, config_t *cfg)
-{
+void config_add(splay_tree_t *config_tree, config_t *cfg) {
cp();
- avl_insert(config_tree, cfg);
+ splay_insert(config_tree, cfg);
}
-config_t *lookup_config(avl_tree_t *config_tree, char *variable)
-{
+config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
config_t cfg, *found;
cp();
cfg.file = "";
cfg.line = 0;
- found = avl_search_closest_greater(config_tree, &cfg);
+ found = splay_search_closest_greater(config_tree, &cfg);
if(!found)
return NULL;
return found;
}
-config_t *lookup_config_next(avl_tree_t *config_tree, config_t *cfg)
-{
- avl_node_t *node;
+config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *cfg) {
+ splay_node_t *node;
config_t *found;
cp();
- node = avl_search_node(config_tree, cfg);
+ node = splay_search_node(config_tree, cfg);
if(node) {
if(node->next) {
- found = (config_t *) node->next->data;
+ found = node->next->data;
if(!strcasecmp(found->variable, cfg->variable))
return found;
return NULL;
}
-int get_config_bool(config_t *cfg, int *result)
-{
+bool get_config_bool(const config_t *cfg, bool *result) {
cp();
if(!cfg)
- return 0;
+ return false;
if(!strcasecmp(cfg->value, "yes")) {
- *result = 1;
- return 1;
+ *result = true;
+ return true;
} else if(!strcasecmp(cfg->value, "no")) {
- *result = 0;
- return 1;
+ *result = false;
+ return true;
}
- syslog(LOG_ERR, _("\"yes\" or \"no\" expected for configuration variable %s in %s line %d"),
+ logger(LOG_ERR, _("\"yes\" or \"no\" expected for configuration variable %s in %s line %d"),
cfg->variable, cfg->file, cfg->line);
- return 0;
+ return false;
}
-int get_config_int(config_t *cfg, int *result)
-{
+bool get_config_int(const config_t *cfg, int *result) {
cp();
if(!cfg)
- return 0;
+ return false;
if(sscanf(cfg->value, "%d", result) == 1)
- return 1;
+ return true;
- syslog(LOG_ERR, _("Integer expected for configuration variable %s in %s line %d"),
+ logger(LOG_ERR, _("Integer expected for configuration variable %s in %s line %d"),
cfg->variable, cfg->file, cfg->line);
- return 0;
+ return false;
}
-int get_config_string(config_t *cfg, char **result)
-{
+bool get_config_string(const config_t *cfg, char **result) {
cp();
if(!cfg)
- return 0;
+ return false;
*result = xstrdup(cfg->value);
- return 1;
+ return true;
}
-int get_config_address(config_t *cfg, struct addrinfo **result)
-{
+bool get_config_address(const config_t *cfg, struct addrinfo **result) {
struct addrinfo *ai;
cp();
if(!cfg)
- return 0;
+ return false;
ai = str2addrinfo(cfg->value, NULL, 0);
if(ai) {
*result = ai;
- return 1;
+ return true;
}
- syslog(LOG_ERR, _("Hostname or IP address expected for configuration variable %s in %s line %d"),
+ logger(LOG_ERR, _("Hostname or IP address expected for configuration variable %s in %s line %d"),
cfg->variable, cfg->file, cfg->line);
- return 0;
+ return false;
}
-int get_config_subnet(config_t *cfg, subnet_t ** result)
-{
- subnet_t *subnet;
+bool get_config_subnet(const config_t *cfg, subnet_t ** result) {
+ subnet_t subnet = {0};
cp();
if(!cfg)
- return 0;
+ return false;
- subnet = str2net(cfg->value);
-
- if(!subnet) {
- syslog(LOG_ERR, _("Subnet expected for configuration variable %s in %s line %d"),
+ if(!str2net(&subnet, cfg->value)) {
+ logger(LOG_ERR, _("Subnet expected for configuration variable %s in %s line %d"),
cfg->variable, cfg->file, cfg->line);
- return 0;
+ return false;
}
/* Teach newbies what subnets are... */
- if(((subnet->type == SUBNET_IPV4)
- && maskcheck(&subnet->net.ipv4.address, subnet->net.ipv4.prefixlength, sizeof(ipv4_t)))
- || ((subnet->type == SUBNET_IPV6)
- && maskcheck(&subnet->net.ipv6.address, subnet->net.ipv6.prefixlength, sizeof(ipv6_t)))) {
- syslog(LOG_ERR, _ ("Network address and prefix length do not match for configuration variable %s in %s line %d"),
+ if(((subnet.type == SUBNET_IPV4)
+ && !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"),
cfg->variable, cfg->file, cfg->line);
- free(subnet);
- return 0;
+ return false;
}
- *result = subnet;
+ *(*result = new_subnet()) = subnet;
- return 1;
+ return true;
}
/*
given, and buf needs to be expanded, the var pointed to by buflen
will be increased.
*/
-char *readline(FILE * fp, char **buf, size_t *buflen)
-{
+static char *readline(FILE * fp, char **buf, size_t *buflen) {
char *newline = NULL;
char *p;
char *line; /* The array that contains everything that has been read so far */
size = newsize;
} else {
*newline = '\0'; /* kill newline */
+ if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */
+ newline[-1] = '\0';
break; /* yay */
}
}
Parse a configuration file and put the results in the configuration tree
starting at *base.
*/
-int read_config_file(avl_tree_t *config_tree, const char *fname)
-{
+int read_config_file(splay_tree_t *config_tree, const char *fname) {
int err = -2; /* Parse error */
FILE *fp;
char *buffer, *line;
- char *variable, *value;
- int lineno = 0, ignore = 0;
+ char *variable, *value, *eol;
+ int lineno = 0;
+ int len;
+ bool ignore = false;
config_t *cfg;
size_t bufsize;
fp = fopen(fname, "r");
if(!fp) {
- syslog(LOG_ERR, _("Cannot open config file %s: %s"), fname,
+ logger(LOG_ERR, _("Cannot open config file %s: %s"), fname,
strerror(errno));
return -3;
}
buffer = xmalloc(bufsize);
for(;;) {
+ if(feof(fp)) {
+ err = 0;
+ break;
+ }
+
line = readline(fp, &buffer, &bufsize);
if(!line) {
break;
}
- if(feof(fp)) {
- err = 0;
- break;
- }
-
lineno++;
- variable = strtok(line, "\t =");
-
- if(!variable)
- continue; /* no tokens on this line */
+ if(!*line || *line == '#')
+ continue;
- if(variable[0] == '#')
- continue; /* comment: ignore */
+ if(ignore) {
+ if(!strncmp(line, "-----END", 8))
+ ignore = false;
+ continue;
+ }
+
+ if(!strncmp(line, "-----BEGIN", 10)) {
+ ignore = true;
+ continue;
+ }
- if(!strcmp(variable, "-----BEGIN"))
- ignore = 1;
+ variable = value = line;
- if(!ignore) {
- value = strtok(NULL, "\t\n\r =");
+ eol = line + strlen(line);
+ while(strchr("\t ", *--eol))
+ *eol = '\0';
- if(!value || value[0] == '#') {
- syslog(LOG_ERR, _("No value for variable `%s' on line %d while reading config file %s"),
- variable, lineno, fname);
- break;
- }
-
- cfg = new_config();
- cfg->variable = xstrdup(variable);
- cfg->value = xstrdup(value);
- cfg->file = xstrdup(fname);
- cfg->line = lineno;
+ len = strcspn(value, "\t =");
+ value += len;
+ value += strspn(value, "\t ");
+ if(*value == '=') {
+ value++;
+ value += strspn(value, "\t ");
+ }
+ variable[len] = '\0';
- config_add(config_tree, cfg);
+
+ if(!*value) {
+ logger(LOG_ERR, _("No value for variable `%s' on line %d while reading config file %s"),
+ variable, lineno, fname);
+ break;
}
- if(!strcmp(variable, "-----END"))
- ignore = 0;
+ cfg = new_config();
+ cfg->variable = xstrdup(variable);
+ cfg->value = xstrdup(value);
+ cfg->file = xstrdup(fname);
+ cfg->line = lineno;
+
+ config_add(config_tree, cfg);
}
free(buffer);
return err;
}
-int read_server_config()
-{
+bool read_server_config() {
char *fname;
int x;
cp();
- asprintf(&fname, "%s/tinc.conf", confbase);
+ xasprintf(&fname, "%s/tinc.conf", confbase);
x = read_config_file(config_tree, fname);
if(x == -1) { /* System error: complain */
- syslog(LOG_ERR, _("Failed to read `%s': %s"), fname, strerror(errno));
+ logger(LOG_ERR, _("Failed to read `%s': %s"), fname, strerror(errno));
}
free(fname);
- return x;
-}
-
-int isadir(const char *f)
-{
- struct stat s;
-
- if(stat(f, &s) < 0)
- return 0;
- else
- return S_ISDIR(s.st_mode);
-}
-
-int is_safe_path(const char *file)
-{
- char *p;
- const char *f;
- char x;
- struct stat s;
- char l[MAXBUFSIZE];
-
- if(*file != '/') {
- syslog(LOG_ERR, _("`%s' is not an absolute path"), file);
- return 0;
- }
-
- p = strrchr(file, '/');
-
- if(p == file) /* It's in the root */
- p++;
-
- x = *p;
- *p = '\0';
-
- f = file;
-
-check1:
- if(lstat(f, &s) < 0) {
- syslog(LOG_ERR, _("Couldn't stat `%s': %s"), f, strerror(errno));
- return 0;
- }
-
- if(s.st_uid != geteuid()) {
- syslog(LOG_ERR, _("`%s' is owned by UID %d instead of %d"),
- f, s.st_uid, geteuid());
- return 0;
- }
-
- if(S_ISLNK(s.st_mode)) {
- syslog(LOG_WARNING, _("Warning: `%s' is a symlink"), f);
-
- if(readlink(f, l, MAXBUFSIZE) < 0) {
- syslog(LOG_ERR, _("Unable to read symbolic link `%s': %s"), f,
- strerror(errno));
- return 0;
- }
-
- f = l;
- goto check1;
- }
-
- *p = x;
- f = file;
-
-check2:
- if(lstat(f, &s) < 0 && errno != ENOENT) {
- syslog(LOG_ERR, _("Couldn't stat `%s': %s"), f, strerror(errno));
- return 0;
- }
-
- if(errno == ENOENT)
- return 1;
-
- if(s.st_uid != geteuid()) {
- syslog(LOG_ERR, _("`%s' is owned by UID %d instead of %d"),
- f, s.st_uid, geteuid());
- return 0;
- }
-
- if(S_ISLNK(s.st_mode)) {
- syslog(LOG_WARNING, _("Warning: `%s' is a symlink"), f);
-
- if(readlink(f, l, MAXBUFSIZE) < 0) {
- syslog(LOG_ERR, _("Unable to read symbolic link `%s': %s"), f,
- strerror(errno));
- return 0;
- }
-
- f = l;
- goto check2;
- }
-
- if(s.st_mode & 0007) {
- /* Accessible by others */
- syslog(LOG_ERR, _("`%s' has unsecure permissions"), f);
- return 0;
- }
-
- return 1;
-}
-
-FILE *ask_and_safe_open(const char *filename, const char *what,
- const char *mode)
-{
- FILE *r;
- char *directory;
- 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 = xstrdup(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, NULL, NULL);
-
- if(!fn) {
- fprintf(stderr, _("Error while reading stdin: %s\n"),
- strerror(errno));
- return NULL;
- }
-
- if(!strlen(fn))
- /* User just pressed enter. */
- fn = xstrdup(filename);
- }
-
- if(!strchr(fn, '/') || fn[0] != '/') {
- /* The directory is a relative path or a filename. */
- char *p;
-
- directory = get_current_dir_name();
- asprintf(&p, "%s/%s", directory, fn);
- free(fn);
- free(directory);
- fn = p;
- }
-
- umask(0077); /* Disallow everything for group and other */
-
- /* Open it first to keep the inode busy */
-
- r = fopen(fn, mode);
-
- if(!r) {
- fprintf(stderr, _("Error opening file `%s': %s\n"),
- fn, strerror(errno));
- free(fn);
- return NULL;
- }
-
- /* Then check the file for nasty attacks */
- if(!is_safe_path(fn)) { /* Do not permit any directories that are readable or writeable by other users. */
- fprintf(stderr, _("The file `%s' (or any of the leading directories) has unsafe permissions.\n"
- "I will not create or overwrite this file.\n"), fn);
- fclose(r);
- free(fn);
- return NULL;
- }
-
- free(fn);
-
- return r;
+ return x == 0;
}
projects / meshlink / blobdiff