/*
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 1.1.2.16 2001/01/05 23:53:53 guus Exp $
+ $Id: subnet.c,v 1.1.2.26 2001/10/27 13:13:35 guus Exp $
*/
#include "config.h"
#include <stdio.h>
#include <syslog.h>
+#include <string.h>
#include "conf.h"
#include "net.h"
-#include "connection.h"
+#include "node.h"
#include "subnet.h"
#include "system.h"
int subnet_compare_mac(subnet_t *a, subnet_t *b)
{
+ int result;
cp
- return memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t));
+ result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t));
+
+ if(result)
+ return result;
+
+ return strcmp(a->owner->name, b->owner->name);
}
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)
- return -1;
+ if(a->net.ipv4.address < b->net.ipv4.address)
+ return -1;
+ else if(a->net.ipv4.address > b->net.ipv4.address)
+ return 1;
+
+ if(a->net.ipv4.mask < b->net.ipv4.mask)
+ return -1;
+ else if(a->net.ipv4.mask > b->net.ipv4.mask)
+ return 1;
- return a->net.ipv4.address - b->net.ipv4.address;
+ return strcmp(a->owner->name, b->owner->name);
}
int subnet_compare_ipv6(subnet_t *a, subnet_t *b)
{
+ int result;
cp
/* Same as ipv4 case, but with nasty 128 bit addresses */
- if(memcmp(&a->net.ipv6.mask, &b->net.ipv6.mask, sizeof(ipv6_t)) > 0)
- if((a->net.ipv6.address.x[0] & b->net.ipv6.mask.x[0]) == b->net.ipv6.address.x[0] &&
- (a->net.ipv6.address.x[1] & b->net.ipv6.mask.x[1]) == b->net.ipv6.address.x[1] &&
- (a->net.ipv6.address.x[2] & b->net.ipv6.mask.x[2]) == b->net.ipv6.address.x[2] &&
- (a->net.ipv6.address.x[3] & b->net.ipv6.mask.x[3]) == b->net.ipv6.address.x[3] &&
- (a->net.ipv6.address.x[4] & b->net.ipv6.mask.x[4]) == b->net.ipv6.address.x[4] &&
- (a->net.ipv6.address.x[5] & b->net.ipv6.mask.x[5]) == b->net.ipv6.address.x[5] &&
- (a->net.ipv6.address.x[6] & b->net.ipv6.mask.x[6]) == b->net.ipv6.address.x[6] &&
- (a->net.ipv6.address.x[7] & b->net.ipv6.mask.x[7]) == b->net.ipv6.address.x[7])
- return -1;
+ result = memcmp(a->net.ipv6.address.x, b->net.ipv6.address.x, sizeof(ipv6_t));
- return memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t));
+ if(result)
+ return result;
+
+ result = memcmp(a->net.ipv6.mask.x, b->net.ipv6.mask.x, sizeof(ipv6_t));
+
+ if(result)
+ return result;
+
+ return strcmp(a->owner->name, b->owner->name);
}
int subnet_compare(subnet_t *a, subnet_t *b)
/* Linked list management */
-void subnet_add(connection_t *cl, subnet_t *subnet)
+void subnet_add(node_t *n, subnet_t *subnet)
{
cp
- subnet->owner = cl;
+ subnet->owner = n;
+
avl_insert(subnet_tree, subnet);
- avl_insert(cl->subnet_tree, subnet);
+cp
+ avl_insert(n->subnet_tree, subnet);
cp
}
-void subnet_del(subnet_t *subnet)
+void subnet_del(node_t *n, subnet_t *subnet)
{
cp
- avl_delete(subnet->owner->subnet_tree, subnet);
+ avl_delete(n->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(node_t *owner, subnet_t *subnet)
+{
+cp
+ return avl_search(owner->subnet_tree, subnet);
+}
+
subnet_t *lookup_subnet_mac(mac_t *address)
{
subnet_t subnet, *p;
subnet.net.ipv4.address = *address;
subnet.net.ipv4.mask = 0xFFFFFFFF;
- p = (subnet_t *)avl_search_closest_greater(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 && ((*address & p->net.ipv4.mask) == p->net.ipv4.address))
- return p;
- else
- return NULL;
+ 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 subnet;
+ subnet_t subnet, *p;
+ int i;
cp
subnet.type = SUBNET_IPV6;
memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t));
memset(&subnet.net.ipv6.mask, 0xFF, 16);
-/* FIXME: check if it REALLY matches */
+ 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 (subnet_t *)avl_search_closest_greater(subnet_tree, &subnet);
+ return p;
}
-void dump_subnet_list(void)
+void dump_subnets(void)
{
char *netstr;
subnet_t *subnet;
projects / tinc / blobdiff