/*
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 1.1.2.1 2000/10/01 03:21:49 guus Exp $
+ $Id: subnet.c,v 1.1.2.26 2001/10/27 13:13:35 guus Exp $
*/
#include "config.h"
-#include "subnet.h"
+
+#include <stdio.h>
+#include <syslog.h>
+#include <string.h>
+
+#include "conf.h"
#include "net.h"
+#include "node.h"
+#include "subnet.h"
+#include "system.h"
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+
+/* lists type of subnet */
+
+avl_tree_t *subnet_tree;
+
+void init_subnets(void)
+{
+cp
+ subnet_tree = avl_alloc_tree((avl_compare_t)subnet_compare, (avl_action_t)free_subnet);
+cp
+}
+
+/* Subnet comparison */
+
+int subnet_compare_mac(subnet_t *a, subnet_t *b)
+{
+ int result;
+cp
+ 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
+ /* We compare as if a subnet is a number that equals (address << 32 + netmask). */
+
+ 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 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 */
+
+ result = memcmp(a->net.ipv6.address.x, b->net.ipv6.address.x, 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)
+{
+ int x;
+cp
+ x = a->type - b->type;
+ if(x)
+ return x;
+
+ switch(a->type)
+ {
+ case SUBNET_MAC:
+ return subnet_compare_mac(a, b);
+ case SUBNET_IPV4:
+ return subnet_compare_ipv4(a, b);
+ case SUBNET_IPV6:
+ return subnet_compare_ipv6(a, b);
+ default:
+ syslog(LOG_ERR, _("subnet_compare() was called with unknown subnet type %d, restarting!"), a->type);
+ sighup = 1;
+ return 0;
+ }
+}
/* Allocating and freeing space for subnets */
subnet_t *new_subnet(void)
{
cp
-cp
+ return (subnet_t *)xmalloc(sizeof(subnet_t));
}
void free_subnet(subnet_t *subnet)
{
cp
-cp
+ free(subnet);
}
/* Linked list management */
-int subnet_add(conn_list_t *cl, subnet_t *subnet)
+void subnet_add(node_t *n, subnet_t *subnet)
{
cp
- subnet->next = cl->subnets->next;
- subnet->prev = NULL;
- subnet->next->prev = subnet
- cl->subnets = subnet;
+ subnet->owner = n;
+
+ avl_insert(subnet_tree, subnet);
+cp
+ avl_insert(n->subnet_tree, subnet);
cp
- return 0;
}
-int subnet_del(conn_list_t *cl, subnet_t *subnet)
+void subnet_del(node_t *n, subnet_t *subnet)
{
cp
- if(subnet->prev)
- {
- subnet->prev->next = subnet->next;
- }
- else
- {
- subnet->owner->subnets = subnet->next;
- }
-
- subnet->next->prev = subnet->prev;
- free_subnet(subnet);
+ avl_delete(n->subnet_tree, subnet);
+cp
+ avl_delete(subnet_tree, subnet);
cp
- return 0;
}
/* Ascii representation of subnets */
subnet_t *str2net(char *subnetstr)
{
+ int type;
+ subnet_t *subnet;
+cp
+ if(sscanf(subnetstr, "%d,", &type) != 1)
+ return NULL;
cp
+ subnet = new_subnet();
cp
+ switch(type)
+ {
+ case SUBNET_MAC:
+ if(sscanf(subnetstr, "%d,%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &subnet->type,
+ &subnet->net.mac.address.x[0],
+ &subnet->net.mac.address.x[1],
+ &subnet->net.mac.address.x[2],
+ &subnet->net.mac.address.x[3],
+ &subnet->net.mac.address.x[4],
+ &subnet->net.mac.address.x[5]) != 7)
+ {
+ free_subnet(subnet);
+ return NULL;
+ }
+ break;
+ case SUBNET_IPV4:
+ if(sscanf(subnetstr, "%d,%lx/%lx", &subnet->type, &subnet->net.ipv4.address, &subnet->net.ipv4.mask) != 3)
+ {
+ free_subnet(subnet);
+ return NULL;
+ }
+ break;
+ case SUBNET_IPV6:
+ if(sscanf(subnetstr, "%d,%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", &subnet->type,
+ &subnet->net.ipv6.address.x[0],
+ &subnet->net.ipv6.address.x[1],
+ &subnet->net.ipv6.address.x[2],
+ &subnet->net.ipv6.address.x[3],
+ &subnet->net.ipv6.address.x[4],
+ &subnet->net.ipv6.address.x[5],
+ &subnet->net.ipv6.address.x[6],
+ &subnet->net.ipv6.address.x[7],
+ &subnet->net.ipv6.mask.x[0],
+ &subnet->net.ipv6.mask.x[1],
+ &subnet->net.ipv6.mask.x[2],
+ &subnet->net.ipv6.mask.x[3],
+ &subnet->net.ipv6.mask.x[4],
+ &subnet->net.ipv6.mask.x[5],
+ &subnet->net.ipv6.mask.x[6],
+ &subnet->net.ipv6.mask.x[7]) != 17)
+ {
+ free_subnet(subnet);
+ return NULL;
+ }
+ break;
+ default:
+ free_subnet(subnet);
+ return NULL;
+ }
+cp
+ return subnet;
}
char *net2str(subnet_t *subnet)
{
+ char *netstr;
cp
+ switch(subnet->type)
+ {
+ case SUBNET_MAC:
+ asprintf(&netstr, "%d,%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", subnet->type,
+ subnet->net.mac.address.x[0],
+ subnet->net.mac.address.x[1],
+ subnet->net.mac.address.x[2],
+ subnet->net.mac.address.x[3],
+ subnet->net.mac.address.x[4],
+ subnet->net.mac.address.x[5]);
+ break;
+ case SUBNET_IPV4:
+ asprintf(&netstr, "%d,%lx/%lx", subnet->type, subnet->net.ipv4.address, subnet->net.ipv4.mask);
+ break;
+ case SUBNET_IPV6:
+ asprintf(&netstr, "%d,%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", subnet->type,
+ subnet->net.ipv6.address.x[0],
+ subnet->net.ipv6.address.x[1],
+ subnet->net.ipv6.address.x[2],
+ subnet->net.ipv6.address.x[3],
+ subnet->net.ipv6.address.x[4],
+ subnet->net.ipv6.address.x[5],
+ subnet->net.ipv6.address.x[6],
+ subnet->net.ipv6.address.x[7],
+ subnet->net.ipv6.mask.x[0],
+ subnet->net.ipv6.mask.x[1],
+ subnet->net.ipv6.mask.x[2],
+ subnet->net.ipv6.mask.x[3],
+ subnet->net.ipv6.mask.x[4],
+ subnet->net.ipv6.mask.x[5],
+ subnet->net.ipv6.mask.x[6],
+ subnet->net.ipv6.mask.x[7]);
+ break;
+ default:
+ 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;
+cp
+ subnet.type = SUBNET_MAC;
+ 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 subnet, *p;
+cp
+ subnet.type = SUBNET_IPV4;
+ subnet.net.ipv4.address = *address;
+ subnet.net.ipv4.mask = 0xFFFFFFFF;
+
+ 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 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);
+
+ 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_subnets(void)
+{
+ char *netstr;
+ subnet_t *subnet;
+ avl_node_t *node;
+cp
+ syslog(LOG_DEBUG, _("Subnet list:"));
+ for(node = subnet_tree->head; node; node = node->next)
+ {
+ subnet = (subnet_t *)node->data;
+ netstr = net2str(subnet);
+ syslog(LOG_DEBUG, " %s owner %s", netstr, subnet->owner->name);
+ free(netstr);
+ }
+ syslog(LOG_DEBUG, _("End of subnet list."));
+cp
+}
projects / tinc / blobdiff