tinc/src/conf.c

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/*
conf.c -- configuration code
Copyright (C) 1998 Emphyrio,
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Copyright (C) 1998,1999,2000 Ivo Timmermans <zarq@iname.com>
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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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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.
*/
/* Created more dynamic storage for lines read from the config file. --
Cris van Pelt */
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#include "config.h"
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xalloc.h>
#include "conf.h"
#include "netutl.h" /* for strtoip */
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#include "system.h"
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config_t *config;
int debug_lvl = 0;
int timeout = 0; /* seconds before timeout */
typedef struct internal_config_t {
char *name;
enum which_t which;
int argtype;
} internal_config_t;
/*
These are all the possible configurable values
*/
static internal_config_t hazahaza[] = {
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{ "AllowConnect", allowconnect, TYPE_BOOL }, /* Is not used anywhere. Remove? */
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{ "ConnectTo", upstreamip, TYPE_IP },
{ "ConnectPort", upstreamport, TYPE_INT },
{ "ListenPort", listenport, TYPE_INT },
{ "MyOwnVPNIP", myvpnip, TYPE_IP },
{ "MyVirtualIP", myvpnip, TYPE_IP }, /* an alias */
{ "Passphrases", passphrasesdir, TYPE_NAME },
{ "PingTimeout", pingtimeout, TYPE_INT },
{ "TapDevice", tapdevice, TYPE_NAME },
{ "KeyExpire", keyexpire, TYPE_INT },
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{ "VpnMask", vpnmask, TYPE_IP },
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{ NULL, 0, 0 }
};
/*
Add given value to the list of configs cfg
*/
config_t *
add_config_val(config_t **cfg, int argtype, char *val)
{
config_t *p;
char *q;
p = (config_t*)xmalloc(sizeof(*p));
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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;
}
if(p->data.val)
{
p->next = *cfg;
*cfg = p;
return p;
}
free(p);
return NULL;
}
/*
Get variable from a section in a configfile. returns -1 on failure.
*/
int
readconfig(const char *fname, FILE *fp)
{
char *line, *temp_buf;
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char *p, *q;
int i, lineno = 0;
config_t *cfg;
line = (char *)xmalloc(80 * sizeof(char));
temp_buf = (char *)xmalloc(80 * sizeof(char));
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for(;;)
{
if(fgets(line, 80, fp) == NULL)
return 0;
while(!index(line, '\n'))
{
fgets(temp_buf, (strlen(line)+1) * 80, fp);
if(!temp_buf)
break;
strcat(line, temp_buf);
line = (char *)xrealloc(line, (strlen(line)+1) * sizeof(char));
}
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lineno++;
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)
{
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fprintf(stderr, _("%s: %d: Invalid variable name `%s'.\n"),
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fname, lineno, p);
return -1;
}
if(((q = strtok(NULL, "\t\n\r =")) == NULL) || q[0] == '#')
{
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fprintf(stderr, _("%s: %d: No value given for `%s'.\n"),
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fname, lineno, hazahaza[i].name);
return -1;
}
cfg = add_config_val(&config, hazahaza[i].argtype, q);
if(cfg == NULL)
{
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fprintf(stderr, _("%s: %d: Invalid value `%s' for variable `%s'.\n"),
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fname, lineno, q, hazahaza[i].name);
return -1;
}
cfg->which = hazahaza[i].which;
if(!config)
config = cfg;
}
}
/*
wrapper function for readconfig
*/
int
read_config_file(const char *fname)
{
FILE *fp;
if((fp = fopen (fname, "r")) == NULL)
{
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fprintf(stderr, _("Could not open %s: %s\n"), fname, sys_errlist[errno]);
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return 1;
}
if(readconfig(fname, fp))
return -1;
fclose (fp);
return 0;
}
/*
Look up the value of the config option type
*/
const config_t *
get_config_val(which_t type)
{
config_t *p;
for(p = config; p != NULL; p = p->next)
if(p->which == type)
return p;
/* Not found */
return NULL;
}