260 lines
6 KiB
C
260 lines
6 KiB
C
/*
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conf.c -- configuration code
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Copyright (C) 1998 Emphyrio,
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Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
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2000 Guus Sliepen <guus@sliepen.warande.net>
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2000 Cris van Pelt <tribbel@arise.dhs.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: conf.c,v 1.9.4.11 2000/10/11 13:42:52 guus Exp $
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*/
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#include "config.h"
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#include <ctype.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <xalloc.h>
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#include "conf.h"
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#include "netutl.h" /* for strtoip */
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#include <utils.h> /* for cp */
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#include "system.h"
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config_t *config;
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int debug_lvl = 0;
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int timeout = 0; /* seconds before timeout */
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char *configfilename = NULL;
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/* Will be set if HUP signal is received. It will be processed when it is safe. */
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int sighup = 0;
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/*
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These are all the possible configurable values
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*/
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static internal_config_t hazahaza[] = {
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/* Main configuration file keywords */
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{ "Name", tincname, TYPE_NAME },
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{ "ConnectTo", connectto, TYPE_NAME },
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{ "PingTimeout", pingtimeout, TYPE_INT },
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{ "TapDevice", tapdevice, TYPE_NAME },
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{ "PrivateKey", privatekey, TYPE_NAME },
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{ "KeyExpire", keyexpire, TYPE_INT },
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{ "Hostnames", resolve_dns, TYPE_BOOL },
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{ "Interface", interface, TYPE_NAME },
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{ "InterfaceIP", interfaceip, TYPE_IP },
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/* Host configuration file keywords */
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{ "Address", address, TYPE_NAME },
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{ "Port", port, TYPE_INT },
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{ "PublicKey", publickey, TYPE_NAME },
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{ "Subnet", subnet, TYPE_NAME },
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{ "RestrictHosts", restricthosts, TYPE_BOOL },
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{ "RestrictSubnets", restrictsubnets, TYPE_BOOL },
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{ "RestrictAddress", restrictaddress, TYPE_BOOL },
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{ "RestrictPort", restrictport, TYPE_BOOL },
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{ "IndirectData", indirectdata, TYPE_BOOL },
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{ "TCPonly", tcponly, TYPE_BOOL },
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{ NULL, 0, 0 }
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};
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/*
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Add given value to the list of configs cfg
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*/
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config_t *
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add_config_val(config_t **cfg, int argtype, char *val)
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{
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config_t *p, *r;
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char *q;
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cp
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p = (config_t*)xmalloc(sizeof(*p));
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p->data.val = 0;
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switch(argtype)
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{
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case TYPE_INT:
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p->data.val = strtol(val, &q, 0);
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if(q && *q)
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p->data.val = 0;
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break;
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case TYPE_NAME:
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p->data.ptr = xmalloc(strlen(val) + 1);
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strcpy(p->data.ptr, val);
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break;
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case TYPE_IP:
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p->data.ip = strtoip(val);
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break;
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case TYPE_BOOL:
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if(!strcasecmp("yes", val))
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p->data.val = stupid_true;
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else if(!strcasecmp("no", val))
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p->data.val = stupid_false;
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else
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p->data.val = 0;
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}
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p->argtype = argtype;
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if(p->data.val)
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{
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if(*cfg)
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{
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r = *cfg;
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while(r->next)
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r = r->next;
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r->next = p;
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}
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else
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*cfg = p;
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p->next = NULL;
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return p;
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}
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free(p);
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cp
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return NULL;
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}
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/*
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Parse a configuration file and put the results in the configuration tree
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starting at *base.
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*/
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int read_config_file(config_t **base, const char *fname)
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{
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int err;
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FILE *fp;
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char line[MAXBUFSIZE]; /* There really should not be any line longer than this... */
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char *p, *q;
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int i, err = -1, lineno = 0;
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config_t *cfg;
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cp
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if((fp = fopen (fname, "r")) == NULL)
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{
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return -1;
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}
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for(;;)
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{
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if(fgets(line, MAXBUFSIZE, fp) == NULL)
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{
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err = 0;
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break;
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}
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lineno++;
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if(!index(line, '\n'))
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{
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syslog(LOG_ERR, _("Line %d too long while reading config file %s"), lineno, fname);
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break;
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}
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if((p = strtok(line, "\t\n\r =")) == NULL)
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continue; /* no tokens on this line */
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if(p[0] == '#')
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continue; /* comment: ignore */
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for(i = 0; hazahaza[i].name != NULL; i++)
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if(!strcasecmp(hazahaza[i].name, p))
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break;
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if(!hazahaza[i].name)
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{
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syslog(LOG_ERR, _("Invalid variable name on line %d while reading config file %s"),
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lineno, fname);
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break;
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}
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if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#')
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{
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fprintf(stderr, _("No value for variable on line %d while reading config file %s"),
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lineno, fname);
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break;
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}
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cfg = add_config_val(base, hazahaza[i].argtype, q);
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if(cfg == NULL)
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{
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fprintf(stderr, _("Invalid value for variable on line %d while reading config file %s"),
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lineno, fname);
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break;
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}
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cfg->which = hazahaza[i].which;
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if(!config)
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config = cfg;
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}
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fclose (fp);
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cp
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return err;
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}
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/*
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Look up the value of the config option type
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*/
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const config_t *get_config_val(config_t *p, which_t type)
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{
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cp
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for(p = config; p != NULL; p = p->next)
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if(p->which == type)
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return p;
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cp
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/* Not found */
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return NULL;
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}
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/*
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Support for multiple config lines.
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Index is used to get a specific value, 0 being the first, 1 the second etc.
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*/
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const config_t *get_next_config_val(config_t *p, which_t type, int index)
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{
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cp
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for(p = config; p != NULL; p = p->next)
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if(p->which == type)
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if(--index < 0)
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return p;
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cp
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/* Not found */
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return NULL;
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}
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/*
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Remove the complete configuration tree.
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*/
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void clear_config(config_t **base)
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{
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config_t *p, *next;
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cp
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for(p = *base; p != NULL; p = next)
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{
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next = p->next;
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if(p->data.ptr && (p->argtype == TYPE_NAME))
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{
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free(p->data.ptr);
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}
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free(p);
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}
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*base = NULL;
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cp
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}
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