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 1.9.4.25 2000/11/29 14:27:24 zarq Exp $
36 #include <utils.h> /* for cp */
39 #include "netutl.h" /* for strtoip */
43 config_t *config = NULL;
45 int timeout = 0; /* seconds before timeout */
46 char *confbase = NULL; /* directory in which all config files are */
47 char *netname = NULL; /* name of the vpn network */
49 /* Will be set if HUP signal is received. It will be processed when it is safe. */
53 These are all the possible configurable values
55 static internal_config_t hazahaza[] = {
56 /* Main configuration file keywords */
57 { "Name", config_name, TYPE_NAME },
58 { "ConnectTo", config_connectto, TYPE_NAME },
59 { "PingTimeout", config_pingtimeout, TYPE_INT },
60 { "TapDevice", config_tapdevice, TYPE_NAME },
61 { "PrivateKey", config_privatekey, TYPE_NAME },
62 { "KeyExpire", config_keyexpire, TYPE_INT },
63 { "Hostnames", config_hostnames, TYPE_BOOL },
64 { "Interface", config_interface, TYPE_NAME },
65 { "InterfaceIP", config_interfaceip, TYPE_IP },
66 /* Host configuration file keywords */
67 { "Address", config_address, TYPE_NAME },
68 { "Port", config_port, TYPE_INT },
69 { "PublicKey", config_publickey, TYPE_NAME },
70 { "Subnet", config_subnet, TYPE_IP }, /* Use IPv4 subnets only for now */
71 { "RestrictHosts", config_restricthosts, TYPE_BOOL },
72 { "RestrictSubnets", config_restrictsubnets, TYPE_BOOL },
73 { "RestrictAddress", config_restrictaddress, TYPE_BOOL },
74 { "RestrictPort", config_restrictport, TYPE_BOOL },
75 { "IndirectData", config_indirectdata, TYPE_BOOL },
76 { "TCPonly", config_tcponly, TYPE_BOOL },
81 Add given value to the list of configs cfg
84 add_config_val(config_t **cfg, int argtype, char *val)
89 p = (config_t*)xmalloc(sizeof(*p));
95 p->data.val = strtol(val, &q, 0);
100 p->data.ptr = xmalloc(strlen(val) + 1);
101 strcpy(p->data.ptr, val);
104 p->data.ip = strtoip(val);
107 if(!strcasecmp("yes", val))
108 p->data.val = stupid_true;
109 else if(!strcasecmp("no", val))
110 p->data.val = stupid_false;
115 p->argtype = argtype;
133 Read exactly one line and strip the trailing newline if any. If the
134 file was on EOF, return NULL. Otherwise, return all the data in a
135 dynamically allocated buffer.
137 char *readline(FILE *fp)
139 char *newline = NULL;
141 char *line; /* The array that contains everything that has been read
143 char *idx; /* Read into this pointer, which points to an offset
145 size_t size, newsize; /* The size of the current array pointed to by
147 size_t maxlen; /* Maximum number of characters that may be read with
148 fgets. This is newsize - oldsize. */
155 line = xmalloc(size);
160 p = fgets(idx, maxlen, fp);
161 if(p == NULL) /* EOF or error */
166 /* otherwise: error; let the calling function print an error
167 message if applicable */
172 newline = strchr(p, '\n');
174 /* We haven't yet read everything to the end of the line */
177 line = xrealloc(line, newsize);
178 idx = &line[size - 1];
179 maxlen = newsize - size + 1;
184 *newline = '\0'; /* kill newline */
193 Parse a configuration file and put the results in the configuration tree
196 int read_config_file(config_t **base, const char *fname)
205 if((fp = fopen (fname, "r")) == NULL)
212 if((line = readline(fp)) == NULL)
220 if((p = strtok(line, "\t =")) == NULL)
221 continue; /* no tokens on this line */
224 continue; /* comment: ignore */
226 for(i = 0; hazahaza[i].name != NULL; i++)
227 if(!strcasecmp(hazahaza[i].name, p))
230 if(!hazahaza[i].name)
232 syslog(LOG_ERR, _("Invalid variable name on line %d while reading config file %s"),
237 if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#')
239 fprintf(stderr, _("No value for variable on line %d while reading config file %s"),
244 cfg = add_config_val(base, hazahaza[i].argtype, q);
247 fprintf(stderr, _("Invalid value for variable on line %d while reading config file %s"),
252 cfg->which = hazahaza[i].which;
262 int read_server_config()
267 asprintf(&fname, "%s/tinc.conf", confbase);
268 x = read_config_file(&config, fname);
271 fprintf(stderr, _("Failed to read `%s': %m\n"),
280 Look up the value of the config option type
282 const config_t *get_config_val(config_t *p, which_t type)
285 for(; p != NULL; p = p->next)
293 Remove the complete configuration tree.
295 void clear_config(config_t **base)
299 for(p = *base; p != NULL; p = next)
302 if(p->data.ptr && (p->argtype == TYPE_NAME))
312 #define is_safe_file(p) 1
314 FILE *ask_and_safe_open(const char* filename, const char* what)
321 /* Check stdin and stdout */
322 if(!isatty(0) || !isatty(1))
324 /* Argh, they are running us from a script or something. Write
325 the files to the current directory and let them burn in hell
327 fn = xstrdup(filename);
331 /* Ask for a file and/or directory name. */
332 fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
334 fflush(stdout); /* Don't wait for a newline */
335 if((fn = readline(stdin)) == NULL)
337 fprintf(stderr, _("Error while reading stdin: %m\n"));
341 /* User just pressed enter. */
342 fn = xstrdup(filename);
345 if((strchr(fn, '/') == NULL) || (fn[0] != '/'))
347 /* The directory is a relative path or a filename. */
350 directory = get_current_dir_name();
351 len = strlen(fn) + strlen(directory) + 2; /* 1 for the / */
353 snprintf(p, len, "%s/%s", directory, fn);
358 if(!is_safe_file(fn))
360 fprintf(stderr, _("The file `%s' (or any of the leading directories) has unsafe permissions.\n"
361 "I will not create or overwrite this file.\n"),
366 if((r = fopen(fn, "w")) == NULL)
368 fprintf(stderr, _("Error opening file `%s': %m\n"),