/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.eu.org>,
- 2000-2002 Ivo Timmermans <ivo@o2w.nl>
+ Copyright (C) 2000-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ 2000-2005 Ivo Timmermans
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 1.1.2.41 2002/09/09 21:25:10 guus Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <stdio.h>
-#include <syslog.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
+#include "system.h"
-#include "conf.h"
+#include "avl_tree.h"
+#include "device.h"
+#include "logger.h"
#include "net.h"
+#include "netutl.h"
#include "node.h"
+#include "process.h"
#include "subnet.h"
-#include "netutl.h"
-
-#include "system.h"
+#include "utils.h"
+#include "xalloc.h"
/* lists type of subnet */
/* Subnet comparison */
-int subnet_compare_mac(subnet_t * a, subnet_t * b)
+static int subnet_compare_mac(const subnet_t *a, const subnet_t *b)
{
int result;
return strcmp(a->owner->name, b->owner->name);
}
-int subnet_compare_ipv4(subnet_t * a, subnet_t * b)
+static int subnet_compare_ipv4(const subnet_t *a, const subnet_t *b)
{
int result;
return strcmp(a->owner->name, b->owner->name);
}
-int subnet_compare_ipv6(subnet_t * a, subnet_t * b)
+static int subnet_compare_ipv6(const subnet_t *a, const subnet_t *b)
{
int result;
return strcmp(a->owner->name, b->owner->name);
}
-int subnet_compare(subnet_t * a, subnet_t * b)
+int subnet_compare(const subnet_t *a, const subnet_t *b)
{
int result;
case SUBNET_IPV6:
return subnet_compare_ipv6(a, b);
default:
- syslog(LOG_ERR,
- _
- ("subnet_compare() was called with unknown subnet type %d, exitting!"),
+ logger(LOG_ERR, _("subnet_compare() was called with unknown subnet type %d, exitting!"),
a->type);
cp_trace();
exit(0);
return avl_alloc_tree((avl_compare_t) subnet_compare, NULL);
}
-void free_subnet_tree(avl_tree_t * subnet_tree)
+void free_subnet_tree(avl_tree_t *subnet_tree)
{
cp();
{
cp();
- return (subnet_t *) xmalloc_and_zero(sizeof(subnet_t));
+ return xmalloc_and_zero(sizeof(subnet_t));
}
-void free_subnet(subnet_t * subnet)
+void free_subnet(subnet_t *subnet)
{
cp();
/* Adding and removing subnets */
-void subnet_add(node_t * n, subnet_t * subnet)
+void subnet_add(node_t *n, subnet_t *subnet)
{
cp();
avl_insert(n->subnet_tree, subnet);
}
-void subnet_del(node_t * n, subnet_t * subnet)
+void subnet_del(node_t *n, subnet_t *subnet)
{
cp();
/* Ascii representation of subnets */
-subnet_t *str2net(char *subnetstr)
+bool str2net(subnet_t *subnet, const char *subnetstr)
{
int i, l;
- subnet_t *subnet;
uint16_t x[8];
cp();
- subnet = new_subnet();
-
if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d",
&x[0], &x[1], &x[2], &x[3], &l) == 5) {
+ if(l < 0 || l > 32)
+ return false;
+
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = l;
- for(i = 0; i < 4; i++)
+ for(i = 0; i < 4; i++) {
+ if(x[i] > 255)
+ return false;
subnet->net.ipv4.address.x[i] = x[i];
+ }
- return subnet;
+ return true;
}
if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
&x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7],
&l) == 9) {
+ if(l < 0 || l > 128)
+ return false;
+
subnet->type = SUBNET_IPV6;
subnet->net.ipv6.prefixlength = l;
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
- return subnet;
+ return true;
}
if(sscanf(subnetstr, "%hu.%hu.%hu.%hu", &x[0], &x[1], &x[2], &x[3]) == 4) {
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = 32;
- for(i = 0; i < 4; i++)
+ for(i = 0; i < 4; i++) {
+ if(x[i] > 255)
+ return false;
subnet->net.ipv4.address.x[i] = x[i];
+ }
- return subnet;
+ return true;
}
if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
- return subnet;
+ return true;
}
if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx",
for(i = 0; i < 6; i++)
subnet->net.mac.address.x[i] = x[i];
- return subnet;
+ return true;
}
- free(subnet);
-
- return NULL;
+ return false;
}
-char *net2str(subnet_t * subnet)
+bool net2str(char *netstr, int len, const subnet_t *subnet)
{
- char *netstr;
-
cp();
+ if(!netstr || !subnet) {
+ logger(LOG_ERR, _("net2str() was called with netstr=%p, subnet=%p!\n"), netstr, subnet);
+ return false;
+ }
+
switch (subnet->type) {
case SUBNET_MAC:
- asprintf(&netstr, "%hx:%hx:%hx:%hx:%hx:%hx",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx",
subnet->net.mac.address.x[0],
subnet->net.mac.address.x[1],
subnet->net.mac.address.x[2],
break;
case SUBNET_IPV4:
- asprintf(&netstr, "%hu.%hu.%hu.%hu/%d",
+ snprintf(netstr, len, "%hu.%hu.%hu.%hu/%d",
subnet->net.ipv4.address.x[0],
subnet->net.ipv4.address.x[1],
subnet->net.ipv4.address.x[2],
break;
case SUBNET_IPV6:
- asprintf(&netstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
ntohs(subnet->net.ipv6.address.x[0]),
ntohs(subnet->net.ipv6.address.x[1]),
ntohs(subnet->net.ipv6.address.x[2]),
break;
default:
- syslog(LOG_ERR,
+ logger(LOG_ERR,
_("net2str() was called with unknown subnet type %d, exiting!"),
subnet->type);
cp_trace();
exit(0);
}
- return netstr;
+ return true;
}
/* Subnet lookup routines */
-subnet_t *lookup_subnet(node_t * owner, subnet_t * subnet)
+subnet_t *lookup_subnet(const node_t *owner, const subnet_t *subnet)
{
cp();
return avl_search(owner->subnet_tree, subnet);
}
-subnet_t *lookup_subnet_mac(mac_t * address)
+subnet_t *lookup_subnet_mac(const mac_t *address)
{
- subnet_t subnet, *p;
+ subnet_t *p, subnet = {0};
cp();
subnet.type = SUBNET_MAC;
- memcpy(&subnet.net.mac.address, address, sizeof(mac_t));
+ subnet.net.mac.address = *address;
subnet.owner = NULL;
- p = (subnet_t *) avl_search(subnet_tree, &subnet);
+ p = avl_search(subnet_tree, &subnet);
return p;
}
-subnet_t *lookup_subnet_ipv4(ipv4_t * address)
+subnet_t *lookup_subnet_ipv4(const ipv4_t *address)
{
- subnet_t subnet, *p;
+ subnet_t *p, subnet = {0};
cp();
subnet.type = SUBNET_IPV4;
- memcpy(&subnet.net.ipv4.address, address, sizeof(ipv4_t));
+ subnet.net.ipv4.address = *address;
subnet.net.ipv4.prefixlength = 32;
subnet.owner = NULL;
do {
/* Go find subnet */
- p = (subnet_t *) avl_search_closest_smaller(subnet_tree, &subnet);
+ p = avl_search_closest_smaller(subnet_tree, &subnet);
/* Check if the found subnet REALLY matches */
break;
}
- if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength, sizeof(ipv4_t)))
+ if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength))
break;
else {
/* Otherwise, see if there is a bigger enclosing subnet */
subnet.net.ipv4.prefixlength = p->net.ipv4.prefixlength - 1;
+ if(subnet.net.ipv4.prefixlength < 0 || subnet.net.ipv4.prefixlength > 32)
+ return NULL;
maskcpy(&subnet.net.ipv4.address, &p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t));
}
}
return p;
}
-subnet_t *lookup_subnet_ipv6(ipv6_t * address)
+subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
{
- subnet_t subnet, *p;
+ subnet_t *p, subnet = {0};
cp();
subnet.type = SUBNET_IPV6;
- memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t));
+ subnet.net.ipv6.address = *address;
subnet.net.ipv6.prefixlength = 128;
subnet.owner = NULL;
do {
/* Go find subnet */
- p = (subnet_t *) avl_search_closest_smaller(subnet_tree, &subnet);
+ p = avl_search_closest_smaller(subnet_tree, &subnet);
/* Check if the found subnet REALLY matches */
if(p->type != SUBNET_IPV6)
return NULL;
- if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength, sizeof(ipv6_t)))
+ if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength))
break;
else {
/* Otherwise, see if there is a bigger enclosing subnet */
subnet.net.ipv6.prefixlength = p->net.ipv6.prefixlength - 1;
+ if(subnet.net.ipv6.prefixlength < 0 || subnet.net.ipv6.prefixlength > 128)
+ return NULL;
maskcpy(&subnet.net.ipv6.address, &p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t));
}
}
return p;
}
+void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
+ avl_node_t *node;
+ int i;
+ char *envp[8];
+ char netstr[MAXNETSTR + 7] = "SUBNET=";
+ char *name, *address, *port;
+
+ asprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ asprintf(&envp[1], "DEVICE=%s", device ? : "");
+ asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ asprintf(&envp[3], "NODE=%s", owner->name);
+
+ if(owner != myself) {
+ sockaddr2str(&owner->address, &address, &port);
+ asprintf(&envp[4], "REMOTEADDRESS=%s", address);
+ asprintf(&envp[5], "REMOTEPORT=%s", port);
+ envp[6] = netstr;
+ envp[7] = NULL;
+ } else {
+ envp[4] = netstr;
+ envp[5] = NULL;
+ }
+
+ name = up ? "subnet-up" : "subnet-down";
+
+ if(!subnet) {
+ for(node = owner->subnet_tree->head; node; node = node->next) {
+ subnet = node->data;
+ if(!net2str(netstr + 7, sizeof netstr - 7, subnet))
+ continue;
+ execute_script(name, envp);
+ }
+ } else {
+ if(net2str(netstr + 7, sizeof netstr - 7, subnet))
+ execute_script(name, envp);
+ }
+
+ for(i = 0; i < (owner != myself ? 6 : 4); i++)
+ free(envp[i]);
+
+ if(owner != myself) {
+ free(address);
+ free(port);
+ }
+}
+
void dump_subnets(void)
{
- char *netstr;
+ char netstr[MAXNETSTR];
subnet_t *subnet;
avl_node_t *node;
cp();
- syslog(LOG_DEBUG, _("Subnet list:"));
+ logger(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);
+ subnet = node->data;
+ if(!net2str(netstr, sizeof netstr, subnet))
+ continue;
+ logger(LOG_DEBUG, _(" %s owner %s"), netstr, subnet->owner->name);
}
- syslog(LOG_DEBUG, _("End of subnet list."));
+ logger(LOG_DEBUG, _("End of subnet list."));
}