2 conf.c -- configuration code
3 Copyright (C) 1998 Robert van der Meulen
4 Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
5 2000 Guus Sliepen <guus@sliepen.warande.net>
6 2000 Cris van Pelt <tribbel@arise.dhs.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 $Id: conf.c,v 1.9.4.23 2000/11/28 23:12:56 zarq Exp $
36 #include <utils.h> /* for cp */
39 #include "netutl.h" /* for strtoip */
44 config_t *config = NULL;
46 int timeout = 0; /* seconds before timeout */
47 char *confbase = NULL; /* directory in which all config files are */
48 char *netname = NULL; /* name of the vpn network */
50 /* Will be set if HUP signal is received. It will be processed when it is safe. */
54 These are all the possible configurable values
56 static internal_config_t hazahaza[] = {
57 /* Main configuration file keywords */
58 { "Name", config_name, TYPE_NAME },
59 { "ConnectTo", config_connectto, TYPE_NAME },
60 { "PingTimeout", config_pingtimeout, TYPE_INT },
61 { "TapDevice", config_tapdevice, TYPE_NAME },
62 { "PrivateKey", config_privatekey, TYPE_NAME },
63 { "KeyExpire", config_keyexpire, TYPE_INT },
64 { "Hostnames", config_hostnames, TYPE_BOOL },
65 { "Interface", config_interface, TYPE_NAME },
66 { "InterfaceIP", config_interfaceip, TYPE_IP },
67 /* Host configuration file keywords */
68 { "Address", config_address, TYPE_NAME },
69 { "Port", config_port, TYPE_INT },
70 { "PublicKey", config_publickey, TYPE_NAME },
71 { "Subnet", config_subnet, TYPE_IP }, /* Use IPv4 subnets only for now */
72 { "RestrictHosts", config_restricthosts, TYPE_BOOL },
73 { "RestrictSubnets", config_restrictsubnets, TYPE_BOOL },
74 { "RestrictAddress", config_restrictaddress, TYPE_BOOL },
75 { "RestrictPort", config_restrictport, TYPE_BOOL },
76 { "IndirectData", config_indirectdata, TYPE_BOOL },
77 { "TCPonly", config_tcponly, TYPE_BOOL },
82 Add given value to the list of configs cfg
85 add_config_val(config_t **cfg, int argtype, char *val)
90 p = (config_t*)xmalloc(sizeof(*p));
96 p->data.val = strtol(val, &q, 0);
101 p->data.ptr = xmalloc(strlen(val) + 1);
102 strcpy(p->data.ptr, val);
105 p->data.ip = strtoip(val);
108 if(!strcasecmp("yes", val))
109 p->data.val = stupid_true;
110 else if(!strcasecmp("no", val))
111 p->data.val = stupid_false;
116 p->argtype = argtype;
134 Parse a configuration file and put the results in the configuration tree
137 int read_config_file(config_t **base, const char *fname)
141 char line[MAXBUFSIZE]; /* There really should not be any line longer than this... */
146 if((fp = fopen (fname, "r")) == NULL)
153 if(fgets(line, MAXBUFSIZE, fp) == NULL)
161 if(!index(line, '\n'))
163 syslog(LOG_ERR, _("Line %d too long while reading config file %s"), lineno, fname);
167 if((p = strtok(line, "\t\n\r =")) == NULL)
168 continue; /* no tokens on this line */
171 continue; /* comment: ignore */
173 for(i = 0; hazahaza[i].name != NULL; i++)
174 if(!strcasecmp(hazahaza[i].name, p))
177 if(!hazahaza[i].name)
179 syslog(LOG_ERR, _("Invalid variable name on line %d while reading config file %s"),
184 if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#')
186 fprintf(stderr, _("No value for variable on line %d while reading config file %s"),
191 cfg = add_config_val(base, hazahaza[i].argtype, q);
194 fprintf(stderr, _("Invalid value for variable on line %d while reading config file %s"),
199 cfg->which = hazahaza[i].which;
209 int read_server_config()
214 asprintf(&fname, "%s/tinc.conf", confbase);
215 x = read_config_file(&config, fname);
218 fprintf(stderr, _("Failed to read `%s': %m\n"),
227 Look up the value of the config option type
229 const config_t *get_config_val(config_t *p, which_t type)
232 for(; p != NULL; p = p->next)
240 Remove the complete configuration tree.
242 void clear_config(config_t **base)
246 for(p = *base; p != NULL; p = next)
249 if(p->data.ptr && (p->argtype == TYPE_NAME))
259 #define is_safe_file(p) 1
261 FILE *ask_and_safe_open(const char* filename)
270 /* Argh, they are running us from a script or something. Write
271 the files to the current directory and let them burn in hell
273 directory = "."; /* get_current_directory */
280 len = strlen(filename) + strlen(directory) + 2; /* 1 for the / */
282 snprintf(fn, len, "%s/%s", directory, filename);
284 if(!is_safe_file(fn))
286 fprintf(stderr, _("The file `%s' (or any of the leading directories) has unsafe permissions.\n"
287 "I will not create or overwrite this file.\n"),
292 if((r = fopen(fn, "w")) == NULL)
294 fprintf(stderr, _("Error opening file `%s': %m"),