/*
conf.c -- configuration code
- Copyright (C) 1998 Emphyrio,
- Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
- 2000 Guus Sliepen <guus@sliepen.warande.net>
- 2000 Cris van Pelt <tribbel@arise.dhs.org>
+ Copyright (C) 1998 Robert van der Meulen
+ 1998-2005 Ivo Timmermans
+ 2000-2010 Guus Sliepen <guus@tinc-vpn.org>
+ 2010 Julien Muchembled <jm@jmuchemb.eu>
+ 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: conf.c,v 1.9.4.20 2000/11/03 22:35:10 zarq Exp $
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "config.h"
+#include "system.h"
-#include <ctype.h>
-#include <errno.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
+#include "avl_tree.h"
+#include "connection.h"
+#include "conf.h"
+#include "logger.h"
+#include "netutl.h" /* for str2address */
+#include "protocol.h"
+#include "utils.h" /* for cp */
+#include "xalloc.h"
-#include <xalloc.h>
+avl_tree_t *config_tree;
-#include "conf.h"
-#include "netutl.h" /* for strtoip */
-#include <utils.h> /* for cp */
+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 */
+list_t *cmdline_conf = NULL; /* global/host configuration values given at the command line */
-#include "config.h"
-#include "connlist.h"
-#include "system.h"
-config_t *config = NULL;
-int debug_lvl = 0;
-int timeout = 0; /* seconds before timeout */
-char *confbase = NULL; /* directory in which all config files are */
-char *netname = NULL; /* name of the vpn network */
+static int config_compare(const config_t *a, const config_t *b) {
+ int result;
-/* Will be set if HUP signal is received. It will be processed when it is safe. */
-int sighup = 0;
+ result = strcasecmp(a->variable, b->variable);
-/*
- These are all the possible configurable values
-*/
-static internal_config_t hazahaza[] = {
-/* Main configuration file keywords */
- { "Name", tincname, TYPE_NAME },
- { "ConnectTo", connectto, TYPE_NAME },
- { "PingTimeout", pingtimeout, TYPE_INT },
- { "TapDevice", tapdevice, TYPE_NAME },
- { "PrivateKey", privatekey, TYPE_NAME },
- { "KeyExpire", keyexpire, TYPE_INT },
- { "Hostnames", resolve_dns, TYPE_BOOL },
- { "Interface", interface, TYPE_NAME },
- { "InterfaceIP", interfaceip, TYPE_IP },
-/* Host configuration file keywords */
- { "Address", address, TYPE_NAME },
- { "Port", port, TYPE_INT },
- { "PublicKey", publickey, TYPE_NAME },
- { "Subnet", subnet, TYPE_IP }, /* Use IPv4 subnets only for now */
- { "RestrictHosts", restricthosts, TYPE_BOOL },
- { "RestrictSubnets", restrictsubnets, TYPE_BOOL },
- { "RestrictAddress", restrictaddress, TYPE_BOOL },
- { "RestrictPort", restrictport, TYPE_BOOL },
- { "IndirectData", indirectdata, TYPE_BOOL },
- { "TCPonly", tcponly, TYPE_BOOL },
- { NULL, 0, 0 }
-};
+ 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 a->file ? strcmp(a->file, b->file) : 0;
+}
+
+void init_configuration(avl_tree_t ** config_tree) {
+ *config_tree = avl_alloc_tree((avl_compare_t) config_compare, (avl_action_t) free_config);
+}
+
+void exit_configuration(avl_tree_t ** config_tree) {
+ avl_delete_tree(*config_tree);
+ *config_tree = NULL;
+}
+
+config_t *new_config(void) {
+ return xmalloc_and_zero(sizeof(config_t));
+}
+
+void free_config(config_t *cfg) {
+ if(cfg->variable)
+ free(cfg->variable);
+
+ if(cfg->value)
+ free(cfg->value);
+
+ if(cfg->file)
+ free(cfg->file);
+
+ free(cfg);
+}
+
+void config_add(avl_tree_t *config_tree, config_t *cfg) {
+ avl_insert(config_tree, cfg);
+}
+
+config_t *lookup_config(avl_tree_t *config_tree, char *variable) {
+ config_t cfg, *found;
+
+ cfg.variable = variable;
+ cfg.file = NULL;
+ cfg.line = 0;
+
+ found = avl_search_closest_greater(config_tree, &cfg);
+
+ if(!found)
+ return NULL;
+
+ if(strcasecmp(found->variable, variable))
+ return NULL;
+
+ return found;
+}
+
+config_t *lookup_config_next(avl_tree_t *config_tree, const config_t *cfg) {
+ avl_node_t *node;
+ config_t *found;
+
+ node = avl_search_node(config_tree, cfg);
+
+ if(node) {
+ if(node->next) {
+ found = node->next->data;
+
+ if(!strcasecmp(found->variable, cfg->variable))
+ return found;
+ }
+ }
+
+ return NULL;
+}
+
+bool get_config_bool(const config_t *cfg, bool *result) {
+ if(!cfg)
+ return false;
+
+ if(!strcasecmp(cfg->value, "yes")) {
+ *result = true;
+ return true;
+ } else if(!strcasecmp(cfg->value, "no")) {
+ *result = false;
+ return true;
+ }
+
+ logger(LOG_ERR, "\"yes\" or \"no\" expected for configuration variable %s in %s line %d",
+ cfg->variable, cfg->file, cfg->line);
+
+ return false;
+}
+
+bool get_config_int(const config_t *cfg, int *result) {
+ if(!cfg)
+ return false;
+
+ if(sscanf(cfg->value, "%d", result) == 1)
+ return true;
+
+ logger(LOG_ERR, "Integer expected for configuration variable %s in %s line %d",
+ cfg->variable, cfg->file, cfg->line);
+
+ return false;
+}
+
+bool get_config_string(const config_t *cfg, char **result) {
+ if(!cfg)
+ return false;
+
+ *result = xstrdup(cfg->value);
+
+ return true;
+}
+
+bool get_config_address(const config_t *cfg, struct addrinfo **result) {
+ struct addrinfo *ai;
+
+ if(!cfg)
+ return false;
+
+ ai = str2addrinfo(cfg->value, NULL, 0);
+
+ if(ai) {
+ *result = ai;
+ return true;
+ }
+
+ logger(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};
+
+ if(!cfg)
+ return false;
+
+ 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 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)))) {
+ 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);
+ return false;
+ }
+
+ *(*result = new_subnet()) = subnet;
+
+ return true;
+}
/*
- Add given value to the list of configs cfg
+ Read exactly one line and strip the trailing newline if any.
*/
-config_t *
-add_config_val(config_t **cfg, int argtype, char *val)
-{
- config_t *p;
- char *q;
-cp
- p = (config_t*)xmalloc(sizeof(*p));
- p->data.val = 0;
-
- switch(argtype)
- {
- case TYPE_INT:
- p->data.val = strtol(val, &q, 0);
- if(q && *q)
- p->data.val = 0;
- break;
- case TYPE_NAME:
- p->data.ptr = xmalloc(strlen(val) + 1);
- strcpy(p->data.ptr, val);
- break;
- case TYPE_IP:
- p->data.ip = strtoip(val);
- break;
- case TYPE_BOOL:
- if(!strcasecmp("yes", val))
- p->data.val = stupid_true;
- else if(!strcasecmp("no", val))
- p->data.val = stupid_false;
- else
- p->data.val = 0;
- }
-
- p->argtype = argtype;
-
- if(p->data.val)
- {
- p->next = *cfg;
- *cfg = p;
-cp
- return p;
- }
- else
- {
- free(p);
-cp
- return NULL;
- }
+static char *readline(FILE * fp, char *buf, size_t buflen) {
+ char *newline = NULL;
+ char *p;
+
+ if(feof(fp))
+ return NULL;
+
+ p = fgets(buf, buflen, fp);
+
+ if(!p)
+ return NULL;
+
+ newline = strchr(p, '\n');
+
+ if(!newline)
+ return buf;
+
+ *newline = '\0'; /* kill newline */
+ if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */
+ 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(LOG_ERR, "%s `%s' on line %d while reading config file %s",
+ err, variable, lineno, fname);
+ else
+ logger(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(config_t **base, const char *fname)
-{
- int err = -1;
- FILE *fp;
- char line[MAXBUFSIZE]; /* There really should not be any line longer than this... */
- char *p, *q;
- int i, lineno = 0;
- config_t *cfg;
-cp
- if((fp = fopen (fname, "r")) == NULL)
- {
- return -1;
- }
-
- for(;;)
- {
- if(fgets(line, MAXBUFSIZE, fp) == NULL)
- {
- err = 0;
- break;
- }
-
- lineno++;
-
- if(!index(line, '\n'))
- {
- syslog(LOG_ERR, _("Line %d too long while reading config file %s"), lineno, fname);
- break;
- }
-
- if((p = strtok(line, "\t\n\r =")) == NULL)
- continue; /* no tokens on this line */
-
- if(p[0] == '#')
- continue; /* comment: ignore */
-
- for(i = 0; hazahaza[i].name != NULL; i++)
- if(!strcasecmp(hazahaza[i].name, p))
- break;
-
- if(!hazahaza[i].name)
- {
- syslog(LOG_ERR, _("Invalid variable name on line %d while reading config file %s"),
- lineno, fname);
- break;
+bool read_config_file(avl_tree_t *config_tree, const char *fname) {
+ FILE *fp;
+ char buffer[MAX_STRING_SIZE];
+ char *line;
+ int lineno = 0;
+ 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));
+ return false;
+ }
+
+ for(;;) {
+ line = readline(fp, buffer, sizeof buffer);
+
+ if(!line) {
+ if(feof(fp))
+ result = true;
+ break;
+ }
+
+ lineno++;
+
+ if(!*line || *line == '#')
+ continue;
+
+ if(ignore) {
+ if(!strncmp(line, "-----END", 8))
+ ignore = false;
+ continue;
+ }
+
+ if(!strncmp(line, "-----BEGIN", 10)) {
+ ignore = true;
+ continue;
+ }
+
+ cfg = parse_config_line(line, fname, lineno);
+ if (!cfg)
+ break;
+ config_add(config_tree, cfg);
}
- if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#')
- {
- fprintf(stderr, _("No value for variable on line %d while reading config file %s"),
- lineno, fname);
- break;
+ fclose(fp);
+
+ return result;
+}
+
+void read_config_options(avl_tree_t *config_tree, const char *prefix) {
+ list_node_t *node, *next;
+ size_t prefix_len = strlen(prefix);
+
+ for(node = cmdline_conf->tail; node; node = next) {
+ config_t *cfg = (config_t *)node->data;
+ next = node->prev;
+
+ if(!prefix && strchr(cfg->variable, '.'))
+ continue;
+
+ if(prefix && (strncmp(prefix, cfg->variable, prefix_len) || cfg->variable[prefix_len] != '.'))
+ continue;
+
+ config_add(config_tree, cfg);
+ node->data = NULL;
+ list_unlink_node(cmdline_conf, node);
}
+}
+
+bool read_server_config() {
+ list_node_t *node, *next;
+ char *fname;
+ bool x;
- cfg = add_config_val(base, hazahaza[i].argtype, q);
- if(cfg == NULL)
- {
- fprintf(stderr, _("Invalid value for variable on line %d while reading config file %s"),
- lineno, fname);
- break;
+ read_config_options(config_tree, NULL);
+
+ xasprintf(&fname, "%s/tinc.conf", confbase);
+ x = read_config_file(config_tree, fname);
+
+ if(!x) { /* System error: complain */
+ logger(LOG_ERR, "Failed to read `%s': %s", fname, strerror(errno));
}
- cfg->which = hazahaza[i].which;
- if(!config)
- config = cfg;
- }
+ free(fname);
- fclose (fp);
-cp
- return err;
+ return x;
}
-int read_server_config()
-{
- char *fname;
- int x;
-cp
- asprintf(&fname, "%s/tinc.conf", confbase);
- x = read_config_file(&config, fname);
- if(x != 0)
- {
- fprintf(stderr, _("Failed to read `%s': %m\n"),
- fname);
- }
- free(fname);
-cp
- return x;
+bool read_connection_config(connection_t *c) {
+ list_node_t *node, *next;
+ size_t name_len = strlen(c->name);
+ char *fname;
+ bool x;
+
+ read_config_options(c->config_tree, c->name);
+
+ xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ x = read_config_file(c->config_tree, fname);
+ free(fname);
+
+ return x;
}
-/*
- Look up the value of the config option type
-*/
-const config_t *get_config_val(config_t *p, which_t type)
-{
-cp
- for(; p != NULL; p = p->next)
- if(p->which == type)
- break;
-cp
- return p;
+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;
+ }
+
+ if(!strlen(fn))
+ /* User just pressed enter. */
+ fn = filename;
+ }
+
+#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;
+ }
+
+ umask(0077); /* Disallow everything for group and other */
+
+ /* Open it first to keep the inode busy */
+
+ r = fopen(fn, "r+") ?: fopen(fn, "w+");
+
+ if(!r) {
+ fprintf(stderr, "Error opening file `%s': %s\n",
+ fn, strerror(errno));
+ return NULL;
+ }
+
+ return r;
}
-/*
- Remove the complete configuration tree.
-*/
-void clear_config(config_t **base)
-{
- config_t *p, *next;
-cp
- for(p = *base; p != NULL; p = next)
- {
- next = p->next;
- if(p->data.ptr && (p->argtype == TYPE_NAME))
- {
- free(p->data.ptr);
- }
- free(p);
- }
- *base = NULL;
-cp
+bool disable_old_keys(FILE *f) {
+ char buf[100];
+ long pos;
+ bool disabled = false;
+
+ rewind(f);
+ pos = ftell(f);
+
+ if(pos < 0)
+ return false;
+
+ while(fgets(buf, sizeof buf, f)) {
+ if(!strncmp(buf, "-----BEGIN RSA", 14)) {
+ buf[11] = 'O';
+ buf[12] = 'L';
+ buf[13] = 'D';
+ if(fseek(f, pos, SEEK_SET))
+ break;
+ if(fputs(buf, f) <= 0)
+ break;
+ disabled = true;
+ }
+ else if(!strncmp(buf, "-----END RSA", 12)) {
+ buf[ 9] = 'O';
+ buf[10] = 'L';
+ buf[11] = 'D';
+ if(fseek(f, pos, SEEK_SET))
+ break;
+ if(fputs(buf, f) <= 0)
+ break;
+ disabled = true;
+ }
+ pos = ftell(f);
+ if(pos < 0)
+ break;
+ }
+
+ return disabled;
}
projects / oweals / tinc.git / blobdiff