/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2004 Guus Sliepen <guus@tinc-vpn.org>,
- 2000-2004 Ivo Timmermans <ivo@tinc-vpn.org>
+ Copyright (C) 2000-2009 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
#include "system.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 "utils.h"
#include "xalloc.h"
avl_tree_t *subnet_tree;
+/* Subnet lookup cache */
+
+static ipv4_t cache_ipv4_address[2];
+static subnet_t *cache_ipv4_subnet[2];
+static bool cache_ipv4_valid[2];
+static int cache_ipv4_slot;
+
+static ipv6_t cache_ipv6_address[2];
+static subnet_t *cache_ipv6_subnet[2];
+static bool cache_ipv6_valid[2];
+static int cache_ipv6_slot;
+
+void subnet_cache_flush() {
+ cache_ipv4_valid[0] = cache_ipv4_valid[1] = false;
+ cache_ipv6_valid[0] = cache_ipv6_valid[1] = false;
+}
+
/* Subnet comparison */
static int subnet_compare_mac(const subnet_t *a, const subnet_t *b)
result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t));
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
+
if(result || !a->owner || !b->owner)
return result;
{
int result;
- result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t));
+ result = b->net.ipv4.prefixlength - a->net.ipv4.prefixlength;
if(result)
return result;
- result = a->net.ipv4.prefixlength - b->net.ipv4.prefixlength;
+ result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t));
+
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
if(result || !a->owner || !b->owner)
return result;
{
int result;
- result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t));
+ result = b->net.ipv6.prefixlength - a->net.ipv6.prefixlength;
if(result)
return result;
+
+ result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t));
- result = a->net.ipv6.prefixlength - b->net.ipv6.prefixlength;
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
if(result || !a->owner || !b->owner)
return result;
cp();
subnet_tree = avl_alloc_tree((avl_compare_t) subnet_compare, (avl_action_t) free_subnet);
+
+ subnet_cache_flush();
}
void exit_subnets(void)
avl_insert(subnet_tree, subnet);
avl_insert(n->subnet_tree, subnet);
+
+ subnet_cache_flush();
}
void subnet_del(node_t *n, subnet_t *subnet)
avl_delete(n->subnet_tree, subnet);
avl_delete(subnet_tree, subnet);
+
+ subnet_cache_flush();
}
/* Ascii representation of subnets */
{
int i, l;
uint16_t x[8];
+ int weight = 10;
cp();
- if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d",
- &x[0], &x[1], &x[2], &x[3], &l) == 5) {
+ if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d#%d",
+ &x[0], &x[1], &x[2], &x[3], &l, &weight) >= 5) {
+ if(l < 0 || l > 32)
+ return false;
+
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = l;
+ subnet->weight = weight;
- 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 true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
+ if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d#%d",
&x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7],
- &l) == 9) {
+ &l, &weight) >= 9) {
+ if(l < 0 || l > 128)
+ return false;
+
subnet->type = SUBNET_IPV6;
subnet->net.ipv6.prefixlength = l;
+ subnet->weight = weight;
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
return true;
}
- if(sscanf(subnetstr, "%hu.%hu.%hu.%hu", &x[0], &x[1], &x[2], &x[3]) == 4) {
+ if(sscanf(subnetstr, "%hu.%hu.%hu.%hu#%d", &x[0], &x[1], &x[2], &x[3], &weight) >= 4) {
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = 32;
+ subnet->weight = weight;
- 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 true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7]) == 8) {
+ 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], &weight) >= 8) {
subnet->type = SUBNET_IPV6;
subnet->net.ipv6.prefixlength = 128;
+ subnet->weight = weight;
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
return true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5]) == 6) {
+ if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx#%d",
+ &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &weight) >= 6) {
subnet->type = SUBNET_MAC;
+ subnet->weight = weight;
for(i = 0; i < 6; i++)
subnet->net.mac.address.x[i] = x[i];
{
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:
- snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx#%d",
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]);
+ subnet->net.mac.address.x[4],
+ subnet->net.mac.address.x[5],
+ subnet->weight);
break;
case SUBNET_IPV4:
- snprintf(netstr, len, "%hu.%hu.%hu.%hu/%d",
+ snprintf(netstr, len, "%hu.%hu.%hu.%hu/%d#%d",
subnet->net.ipv4.address.x[0],
subnet->net.ipv4.address.x[1],
subnet->net.ipv4.address.x[2],
- subnet->net.ipv4.address.x[3], subnet->net.ipv4.prefixlength);
+ subnet->net.ipv4.address.x[3],
+ subnet->net.ipv4.prefixlength,
+ subnet->weight);
break;
case SUBNET_IPV6:
- snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d#%d",
ntohs(subnet->net.ipv6.address.x[0]),
ntohs(subnet->net.ipv6.address.x[1]),
ntohs(subnet->net.ipv6.address.x[2]),
ntohs(subnet->net.ipv6.address.x[5]),
ntohs(subnet->net.ipv6.address.x[6]),
ntohs(subnet->net.ipv6.address.x[7]),
- subnet->net.ipv6.prefixlength);
+ subnet->net.ipv6.prefixlength,
+ subnet->weight);
break;
default:
subnet_t *lookup_subnet_ipv4(const ipv4_t *address)
{
- subnet_t *p, subnet = {0};
+ subnet_t *p, *r = NULL, subnet = {0};
+ avl_node_t *n;
+ int i;
cp();
+ // Check if this address is cached
+
+ for(i = 0; i < 2; i++) {
+ if(!cache_ipv4_valid[i])
+ continue;
+ if(!memcmp(address, &cache_ipv4_address[i], sizeof *address))
+ return cache_ipv4_subnet[i];
+ }
+
+ // Search all subnets for a matching one
+
subnet.type = SUBNET_IPV4;
subnet.net.ipv4.address = *address;
subnet.net.ipv4.prefixlength = 32;
subnet.owner = NULL;
- do {
- /* Go find subnet */
-
- p = avl_search_closest_smaller(subnet_tree, &subnet);
-
- /* Check if the found subnet REALLY matches */
+ for(n = subnet_tree->head; n; n = n->next) {
+ p = n->data;
+
+ if(!p || p->type != subnet.type)
+ continue;
- if(p) {
- if(p->type != SUBNET_IPV4) {
- p = NULL;
+ if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength)) {
+ r = p;
+ if(p->owner->status.reachable)
break;
- }
+ }
+ }
- if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength, sizeof(ipv4_t)))
- break;
- else {
- /* Otherwise, see if there is a bigger enclosing subnet */
+ // Cache the result
- subnet.net.ipv4.prefixlength = p->net.ipv4.prefixlength - 1;
- maskcpy(&subnet.net.ipv4.address, &p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t));
- }
- }
- } while(p);
+ cache_ipv4_slot = !cache_ipv4_slot;
+ memcpy(&cache_ipv4_address[cache_ipv4_slot], address, sizeof *address);
+ cache_ipv4_subnet[cache_ipv4_slot] = r;
+ cache_ipv4_valid[cache_ipv4_slot] = true;
- return p;
+ return r;
}
subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
{
- subnet_t *p, subnet = {0};
+ subnet_t *p, *r = NULL, subnet = {0};
+ avl_node_t *n;
+ int i;
cp();
+ // Check if this address is cached
+
+ for(i = 0; i < 2; i++) {
+ if(!cache_ipv6_valid[i])
+ continue;
+ if(!memcmp(address, &cache_ipv6_address[i], sizeof *address))
+ return cache_ipv6_subnet[i];
+ }
+
+ // Search all subnets for a matching one
+
subnet.type = SUBNET_IPV6;
subnet.net.ipv6.address = *address;
subnet.net.ipv6.prefixlength = 128;
subnet.owner = NULL;
- do {
- /* Go find subnet */
+ for(n = subnet_tree->head; n; n = n->next) {
+ p = n->data;
+
+ if(!p || p->type != subnet.type)
+ continue;
- p = avl_search_closest_smaller(subnet_tree, &subnet);
+ if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength)) {
+ r = p;
+ if(p->owner->status.reachable)
+ break;
+ }
+ }
- /* Check if the found subnet REALLY matches */
+ // Cache the result
- if(p) {
- if(p->type != SUBNET_IPV6)
- return NULL;
+ cache_ipv6_slot = !cache_ipv6_slot;
+ memcpy(&cache_ipv6_address[cache_ipv6_slot], address, sizeof *address);
+ cache_ipv6_subnet[cache_ipv6_slot] = r;
+ cache_ipv6_valid[cache_ipv6_slot] = true;
- if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength, sizeof(ipv6_t)))
- break;
- else {
- /* Otherwise, see if there is a bigger enclosing subnet */
+ return r;
+}
- subnet.net.ipv6.prefixlength = p->net.ipv6.prefixlength - 1;
- maskcpy(&subnet.net.ipv6.address, &p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t));
- }
+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;
+
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NODE=%s", owner->name);
+
+ if(owner != myself) {
+ sockaddr2str(&owner->address, &address, &port);
+ xasprintf(&envp[4], "REMOTEADDRESS=%s", address);
+ xasprintf(&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);
}
- } while(p);
+ } else {
+ if(net2str(netstr + 7, sizeof netstr - 7, subnet))
+ execute_script(name, envp);
+ }
- return p;
+ for(i = 0; i < (owner != myself ? 6 : 4); i++)
+ free(envp[i]);
+
+ if(owner != myself) {
+ free(address);
+ free(port);
+ }
}
void dump_subnets(void)
projects / tinc / blobdiff