/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
- 2000 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2000,2001 Guus Sliepen <guus@sliepen.warande.net>,
+ 2000,2001 Ivo Timmermans <itimmermans@bigfoot.com>
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: subnet.c,v 1.1.2.13 2000/11/20 19:41:13 guus Exp $
+ $Id: subnet.c,v 1.1.2.24 2001/08/28 20:52:39 guus Exp $
*/
#include "config.h"
#include <stdio.h>
#include <syslog.h>
+#include <string.h>
#include "conf.h"
#include "net.h"
#include <utils.h>
#include <xalloc.h>
-#include <rbl.h>
+#include <avl_tree.h>
/* lists type of subnet */
-rbltree_t *subnet_tree;
+avl_tree_t *subnet_tree;
void init_subnets(void)
{
cp
- subnet_tree = new_rbltree((rbl_compare_t)subnet_compare, (rbl_action_t)free_subnet);
+ subnet_tree = avl_alloc_tree((avl_compare_t)subnet_compare, (avl_action_t)free_subnet);
cp
}
int subnet_compare_ipv4(subnet_t *a, subnet_t *b)
{
cp
- /* If the subnet of a falls within the range of subnet b,
- then we consider a smaller then b.
- Otherwise, the addresses alone (and not the subnet masks) will be compared.
- */
+ /* We compare as if a subnet is a number that equals (address << 32 + netmask). */
- if(a->net.ipv4.mask > b->net.ipv4.mask)
- if((a->net.ipv4.address & b->net.ipv4.mask) == b->net.ipv4.address)
+ if(a->net.ipv4.address == b->net.ipv4.address)
+ {
+ if(a->net.ipv4.mask < b->net.ipv4.mask)
return -1;
-
- return a->net.ipv4.address - b->net.ipv4.address;
+ else if(a->net.ipv4.mask > b->net.ipv4.mask)
+ return 1;
+ else
+ return 0;
+ }
+ else
+ {
+ if(a->net.ipv4.address < b->net.ipv4.address)
+ return -1;
+ else if(a->net.ipv4.address > b->net.ipv4.address)
+ return 1;
+ else
+ return 0;
+ }
}
int subnet_compare_ipv6(subnet_t *a, subnet_t *b)
void subnet_add(connection_t *cl, subnet_t *subnet)
{
cp
- rbl_insert(subnet_tree, subnet);
- rbl_insert(cl->subnet_tree, subnet);
+ subnet->owner = cl;
+
+ while(!avl_insert(subnet_tree, subnet))
+ {
+ subnet_t *old;
+
+ old = (subnet_t *)avl_search(subnet_tree, subnet);
+
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ {
+ char *subnetstr;
+ subnetstr = net2str(subnet);
+ syslog(LOG_WARNING, _("Duplicate subnet %s for %s (%s), previous owner %s (%s)!"),
+ subnetstr, cl->name, cl->hostname, old->owner->name, old->owner->hostname);
+ free(subnetstr);
+ }
+
+ subnet_del(old);
+ }
+
+ avl_insert(cl->subnet_tree, subnet);
cp
}
void subnet_del(subnet_t *subnet)
{
cp
- rbl_delete(subnet->owner->subnet_tree, subnet);
- rbl_delete(subnet_tree, subnet);
+ avl_delete(subnet->owner->subnet_tree, subnet);
+cp
+ avl_delete(subnet_tree, subnet);
cp
}
subnet->net.ipv6.mask.x[7]);
break;
default:
- asprintf(&netstr, _("unknown"));
+ asprintf(&netstr, _("unknown subnet type"));
}
cp
return netstr;
/* Subnet lookup routines */
-subnet_t *lookup_subnet_mac(mac_t address)
+subnet_t *lookup_subnet_mac(mac_t *address)
{
- subnet_t subnet;
+ subnet_t subnet, *p;
cp
subnet.type = SUBNET_MAC;
- subnet.net.mac.address = address;
- return (subnet_t *)rbl_search_closest(subnet_tree, &subnet);
+ memcpy(&subnet.net.mac.address, address, sizeof(mac_t));
+
+ p = (subnet_t *)avl_search(subnet_tree, &subnet);
+cp
+ return p;
}
-subnet_t *lookup_subnet_ipv4(ipv4_t address)
+subnet_t *lookup_subnet_ipv4(ipv4_t *address)
{
- subnet_t subnet;
+ subnet_t subnet, *p;
cp
subnet.type = SUBNET_IPV4;
- subnet.net.ipv4.address = address;
+ subnet.net.ipv4.address = *address;
subnet.net.ipv4.mask = 0xFFFFFFFF;
- return (subnet_t *)rbl_search_closest(subnet_tree, &subnet);
+
+ do
+ {
+ /* Go find subnet */
+
+ p = (subnet_t *)avl_search_closest_smaller(subnet_tree, &subnet);
+
+ /* Check if the found subnet REALLY matches */
+cp
+ if(p)
+ {
+ if ((*address & p->net.ipv4.mask) == p->net.ipv4.address)
+ break;
+ else
+ {
+ /* Otherwise, see if there is a bigger enclosing subnet */
+
+ subnet.net.ipv4.mask = p->net.ipv4.mask << 1;
+ subnet.net.ipv4.address = p->net.ipv4.address & subnet.net.ipv4.mask;
+ }
+ }
+ } while (p);
+
+ return p;
}
-subnet_t *lookup_subnet_ipv6(ipv6_t address)
+subnet_t *lookup_subnet_ipv6(ipv6_t *address)
{
- subnet_t subnet;
+ subnet_t subnet, *p;
+ int i;
cp
subnet.type = SUBNET_IPV6;
- subnet.net.ipv6.address = address;
+ memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t));
memset(&subnet.net.ipv6.mask, 0xFF, 16);
- return (subnet_t *)rbl_search_closest(subnet_tree, &subnet);
+
+ p = (subnet_t *)avl_search_closest_greater(subnet_tree, &subnet);
+
+ if(p)
+ for(i=0; i<8; i++)
+ if((address->x[i] & p->net.ipv6.address.x[i]) != p->net.ipv6.address.x[i])
+ return NULL;
+
+ return p;
}
void dump_subnet_list(void)
{
char *netstr;
subnet_t *subnet;
- rbl_t *rbl;
+ avl_node_t *node;
cp
syslog(LOG_DEBUG, _("Subnet list:"));
- RBL_FOREACH(subnet_tree, rbl)
+ for(node = subnet_tree->head; node; node = node->next)
{
- subnet = (subnet_t *)rbl->data;
+ subnet = (subnet_t *)node->data;
netstr = net2str(subnet);
syslog(LOG_DEBUG, " %s owner %s", netstr, subnet->owner->name);
free(netstr);