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/* config.c config file reader
*
* $Id: config.c,v 1.3 1995/03/19 17:21:06 bdale Exp $
*
* Copyright 1991, Michael Westerhof, Sun Microsystems, Inc.
* This software may be freely used, distributed, or modified, providing
* this header is not removed.
*
*/
#include <stdio.h>
#include <memory.h>
#include <string.h>
#include <ctype.h>
#include <syslog.h>
#include <stdlib.h>
#include "ipip.h"
static void cerr(); /* General error printer */
static void init_config();
static void c_interface();
static void print_config();
static int clineno;
static int cerrflag;
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* open and read the interface config file. Also initialize the iface defs
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
int
read_config(f)
char *f;
{
FILE *cf;
char buf[256], *p;
init_config();
/* Open the file */
if((cf = fopen(f,"r"))==NULL){
syslog(LOG_ERR, "Config file %s not found or could not be opened",f);
return -1;
}
while(fgets(buf, 255, cf)!=NULL){
clineno++;
if((p = strtok(buf, " \t\n\r")) == NULL)continue;
if(*p=='#' || *p==';')continue;
if(strcmp(p,"interface")==0)c_interface();
/* else if(strcmp(p,"whatever")==0)c_dowhatever(); */
else cerr("Unrecognized command: %s",p);
}
if(ifs_top==0)cerr("No interfaces defined","");
if(debugd)print_config();
return cerrflag;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Initialize defaults and setup the interface structures
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
static void
init_config()
{
int i;
for(i=0;i<MAX_IFACES;i++){
ifs[i].type = IF_TYPE_NONE;
ifs[i].status = 0;
ifs[i].id = NULL;
ifs[i].devname = NULL;
ifs[i].unit = 0;
ifs[i].fd = -1;
ifs[i].private = NULL;
ifs[i].ifopen = NULL;
ifs[i].ifread = NULL;
ifs[i].ifsend = NULL;
ifs[i].in = 0;
ifs[i].out = 0;
ifs[i].out_overruns = 0;
ifs[i].martians_in = 0;
ifs[i].bogus_in = 0;
ifs[i].looped_in = 0;
}
ifs_top = 0;
clineno = 0;
cerrflag = 0;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Print out the config table (DEBUG)
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
static void
print_config()
{
int i;
char *id, *dev;
if(cerrflag==0) syslog(LOG_DEBUG, "%d interfaces:\n",ifs_top);
else syslog(LOG_DEBUG, "%d interfaces (there are errors):\n", ifs_top);
for(i=0;i<ifs_top;i++){
if(ifs[i].id == NULL) id = "(none)";
else id = ifs[i].id;
if(ifs[i].devname == NULL) dev = "(none)";
else dev = ifs[i].devname;
if(ifs[i].type == IF_TYPE_NONE){
syslog(LOG_DEBUG,"interface %-4s type NONE devicename %s unit %d\n",
id, dev, ifs[i].unit);
} else if(ifs[i].type == IF_TYPE_SLIP){
syslog(LOG_DEBUG,"interface %-4s type slip devicename %s speed %d\n",
id, dev, ifs[i].unit);
} else if(ifs[i].type == IF_TYPE_TUN){
syslog(LOG_DEBUG,"interface %-4s type tun devicename %s\n",
id, dev);
} else if(ifs[i].type == IF_TYPE_IPUDP){
syslog(LOG_DEBUG,"interface %-4s type udp port %d\n",
id, ifs[i].unit);
} else if(ifs[i].type == IF_TYPE_IPIP){
syslog(LOG_DEBUG,"interface %-4s type ip protocol id %d\n",
id, ifs[i].unit);
} else {
syslog(LOG_DEBUG,"interface %-4s type UNKNOWN devicename %s unit %d\n",
id, dev, ifs[i].unit);
}
}
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Print a general config file error
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
static void
cerr(s,a)
char *s;
char *a;
{
syslog(LOG_ERR,"Config file error at line %d:\n",clineno);
(void)fprintf(stderr,s,a);
(void)fprintf(stderr,"\n");
cerrflag--;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Handle the "define" command
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
static void
c_interface()
{
int syntax;
char *q;
if(ifs_top>=MAX_IFACES){
cerr("Too many interfaces defined","");
return;
}
syntax = 0;
if((q = strtok((char *)NULL, " \t\n\r"))){
ifs[ifs_top].id = strdup(q);
} else syntax++;
if((q = strtok((char *)NULL, " \t\n\r"))){
if(strcmp(q,"tunnel")==0){
ifs[ifs_top].type = IF_TYPE_TUN;
ifs[ifs_top].ifopen = tun_open;
ifs[ifs_top].ifread = tun_read;
ifs[ifs_top].ifsend = tun_send;
} else if(strcmp(q,"slip")==0){
ifs[ifs_top].type = IF_TYPE_SLIP;
ifs[ifs_top].ifopen = slip_open;
ifs[ifs_top].ifread = slip_read;
ifs[ifs_top].ifsend = slip_send;
} else if(strcmp(q,"ip")==0){
ifs[ifs_top].type = IF_TYPE_IPIP;
ifs[ifs_top].ifopen = ip_open;
ifs[ifs_top].ifread = ip_read;
ifs[ifs_top].ifsend = ip_send;
} else if(strcmp(q,"udp")==0){
ifs[ifs_top].type = IF_TYPE_IPUDP;
ifs[ifs_top].ifopen = ip_open;
ifs[ifs_top].ifread = ip_read;
ifs[ifs_top].ifsend = ip_send;
} else cerr("Bad interface type: %s",q);
} else syntax++;
if((q = strtok((char *)NULL, " \t\n\r"))){
ifs[ifs_top].devname = strdup(q);
} else syntax++;
if((q = strtok((char *)NULL, " \t\n\r"))){
ifs[ifs_top].unit = atoi(q);
} else syntax++;
if(syntax)cerr("Syntax error (interface <name> <type> <device> <int>","");
ifs_top++;
}
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