/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.warande.net>,
- 2000-2002 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2000-2013 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: subnet.c,v 1.1.2.36 2002/06/08 12:57:10 guus Exp $
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#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 "splay_tree.h"
+#include "control_common.h"
+#include "device.h"
+#include "hash.h"
+#include "logger.h"
+#include "names.h"
#include "net.h"
+#include "netutl.h"
#include "node.h"
+#include "script.h"
#include "subnet.h"
-#include "netutl.h"
-
-#include "system.h"
+#include "utils.h"
+#include "xalloc.h"
/* lists type of subnet */
-avl_tree_t *subnet_tree;
-
-/* Subnet comparison */
+splay_tree_t *subnet_tree;
-int subnet_compare_mac(subnet_t *a, subnet_t *b)
-{
-cp
- return memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t));
-}
+/* Subnet lookup cache */
-int subnet_compare_ipv4(subnet_t *a, subnet_t *b)
-{
- int result;
-cp
- result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t));
-
- if(result)
- return result;
+static hash_t *ipv4_cache;
+static hash_t *ipv6_cache;
+static hash_t *mac_cache;
- return a->net.ipv4.prefixlength - b->net.ipv4.prefixlength;
+void subnet_cache_flush(void) {
+ hash_clear(ipv4_cache);
+ hash_clear(ipv6_cache);
+ hash_clear(mac_cache);
}
-int subnet_compare_ipv6(subnet_t *a, subnet_t *b)
-{
- int result;
-cp
- result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t));
-
- if(result)
- return result;
+/* Initialising trees */
- return a->net.ipv6.prefixlength - b->net.ipv6.prefixlength;
-}
+void init_subnets(void) {
+ subnet_tree = splay_alloc_tree((splay_compare_t) subnet_compare, (splay_action_t) free_subnet);
-int subnet_compare(subnet_t *a, subnet_t *b)
-{
- int result;
-cp
- result = a->type - b->type;
-
- if(result)
- return result;
-
- 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, exitting!"), a->type);
- cp_trace();
- exit(0);
- }
-
- return 0;
+ ipv4_cache = hash_alloc(0x100, sizeof(ipv4_t));
+ ipv6_cache = hash_alloc(0x100, sizeof(ipv6_t));
+ mac_cache = hash_alloc(0x100, sizeof(mac_t));
}
-/* Initialising trees */
-
-void init_subnets(void)
-{
-cp
- subnet_tree = avl_alloc_tree((avl_compare_t)subnet_compare, (avl_action_t)free_subnet);
-cp
-}
+void exit_subnets(void) {
+ splay_delete_tree(subnet_tree);
-void exit_subnets(void)
-{
-cp
- avl_delete_tree(subnet_tree);
-cp
+ hash_free(ipv4_cache);
+ hash_free(ipv6_cache);
+ hash_free(mac_cache);
}
-avl_tree_t *new_subnet_tree(void)
-{
-cp
- return avl_alloc_tree((avl_compare_t)subnet_compare, NULL);
-cp
+splay_tree_t *new_subnet_tree(void) {
+ return splay_alloc_tree((splay_compare_t) subnet_compare, NULL);
}
-void free_subnet_tree(avl_tree_t *subnet_tree)
-{
-cp
- avl_delete_tree(subnet_tree);
-cp
+void free_subnet_tree(splay_tree_t *subnet_tree) {
+ splay_delete_tree(subnet_tree);
}
/* Allocating and freeing space for subnets */
-subnet_t *new_subnet(void)
-{
-cp
- return (subnet_t *)xmalloc(sizeof(subnet_t));
+subnet_t *new_subnet(void) {
+ return xzalloc(sizeof(subnet_t));
}
-void free_subnet(subnet_t *subnet)
-{
-cp
- free(subnet);
+void free_subnet(subnet_t *subnet) {
+ free(subnet);
}
/* Adding and removing subnets */
-void subnet_add(node_t *n, subnet_t *subnet)
-{
-cp
- subnet->owner = n;
+void subnet_add(node_t *n, subnet_t *subnet) {
+ subnet->owner = n;
- avl_insert(subnet_tree, subnet);
-cp
- avl_insert(n->subnet_tree, subnet);
-cp
-}
+ splay_insert(subnet_tree, subnet);
+ if (n)
+ splay_insert(n->subnet_tree, subnet);
-void subnet_del(node_t *n, subnet_t *subnet)
-{
-cp
- avl_delete(n->subnet_tree, subnet);
-cp
- avl_delete(subnet_tree, subnet);
-cp
+ subnet_cache_flush();
}
-/* Ascii representation of subnets */
-
-subnet_t *str2net(char *subnetstr)
-{
- int i, l;
- subnet_t *subnet;
- uint16_t x[8];
-cp
- subnet = new_subnet();
-cp
- if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d",
- &x[0], &x[1], &x[2], &x[3],
- &l) == 5)
- {
- subnet->type = SUBNET_IPV4;
- subnet->net.ipv4.prefixlength = l;
- for(i = 0; i < 4; i++)
- subnet->net.ipv4.address.x[i] = x[i];
- return subnet;
- }
-
- 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)
- {
- 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;
- }
-
- 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++)
- subnet->net.ipv4.address.x[i] = x[i];
- return subnet;
- }
-
- 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)
- {
- subnet->type = SUBNET_IPV6;
- subnet->net.ipv6.prefixlength = 128;
- for(i = 0; i < 8; i++)
- subnet->net.ipv6.address.x[i] = htons(x[i]);
- return subnet;
- }
-
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5]) == 6)
- {
- subnet->type = SUBNET_MAC;
- for(i = 0; i < 6; i++)
- subnet->net.mac.address.x[i] = x[i];
- return subnet;
- }
-
- free(subnet);
- return NULL;
-}
+void subnet_del(node_t *n, subnet_t *subnet) {
+ if (n)
+ splay_delete(n->subnet_tree, subnet);
+ splay_delete(subnet_tree, subnet);
-char *net2str(subnet_t *subnet)
-{
- char *netstr;
-cp
- switch(subnet->type)
- {
- case SUBNET_MAC:
- asprintf(&netstr, "%hx:%hx:%hx:%hx:%hx:%hx",
- 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, "%hu.%hu.%hu.%hu/%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);
- break;
- case SUBNET_IPV6:
- asprintf(&netstr, "%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]),
- ntohs(subnet->net.ipv6.address.x[3]),
- ntohs(subnet->net.ipv6.address.x[4]),
- 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);
- break;
- default:
- syslog(LOG_ERR, _("net2str() was called with unknown subnet type %d, exiting!"), subnet->type);
- cp_trace();
- exit(0);
- }
-cp
- return netstr;
+ subnet_cache_flush();
}
/* 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(const node_t *owner, const subnet_t *subnet) {
+ return splay_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));
+subnet_t *lookup_subnet_mac(const node_t *owner, const mac_t *address) {
+ subnet_t *r = NULL;
+
+ // Check if this address is cached
+
+ if((r = hash_search(mac_cache, address)))
+ return r;
+
+ // Search all subnets for a matching one
+
+ for splay_each(subnet_t, p, owner ? owner->subnet_tree : subnet_tree) {
+ if(!p || p->type != SUBNET_MAC)
+ continue;
+
+ if(!memcmp(address, &p->net.mac.address, sizeof *address)) {
+ r = p;
+ if(!p->owner || p->owner->status.reachable)
+ break;
+ }
+ }
+
+ // Cache the result
- p = (subnet_t *)avl_search(subnet_tree, &subnet);
-cp
- return p;
+ if(r)
+ hash_insert(mac_cache, address, r);
+
+ return r;
+}
+
+subnet_t *lookup_subnet_ipv4(const ipv4_t *address) {
+ subnet_t *r = NULL;
+
+ // Check if this address is cached
+
+ if((r = hash_search(ipv4_cache, address)))
+ return r;
+
+ // Search all subnets for a matching one
+
+ for splay_each(subnet_t, p, subnet_tree) {
+ if(!p || p->type != SUBNET_IPV4)
+ continue;
+
+ if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength)) {
+ r = p;
+ if(!p->owner || p->owner->status.reachable)
+ break;
+ }
+ }
+
+ // Cache the result
+
+ if(r)
+ hash_insert(ipv4_cache, address, r);
+
+ return r;
}
-subnet_t *lookup_subnet_ipv4(ipv4_t *address)
-{
- subnet_t subnet, *p;
-cp
- subnet.type = SUBNET_IPV4;
- memcpy(&subnet.net.ipv4.address, address, sizeof(ipv4_t));
- subnet.net.ipv4.prefixlength = 32;
-
- 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(p->type != SUBNET_IPV4)
- {
- p = NULL;
- 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 */
-
- 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);
-cp
- return p;
+subnet_t *lookup_subnet_ipv6(const ipv6_t *address) {
+ subnet_t *r = NULL;
+
+ // Check if this address is cached
+
+ if((r = hash_search(ipv6_cache, address)))
+ return r;
+
+ // Search all subnets for a matching one
+
+ for splay_each(subnet_t, p, subnet_tree) {
+ if(!p || p->type != SUBNET_IPV6)
+ continue;
+
+ if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength)) {
+ r = p;
+ if(!p->owner || p->owner->status.reachable)
+ break;
+ }
+ }
+
+ // Cache the result
+
+ if(r)
+ hash_insert(ipv6_cache, address, r);
+
+ return r;
}
-subnet_t *lookup_subnet_ipv6(ipv6_t *address)
-{
- subnet_t subnet, *p;
-cp
- subnet.type = SUBNET_IPV6;
- memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t));
- subnet.net.ipv6.prefixlength = 128;
-
- 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(p->type != SUBNET_IPV6)
- return NULL;
-
- 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 */
-
- 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));
- }
- }
- } while (p);
-cp
- return p;
+void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
+ char netstr[MAXNETSTR];
+ char *name, *address, *port;
+ char empty[] = "";
+
+ // Prepare environment variables to be passed to the script
+
+ char *envp[10] = {NULL};
+ int n = 0;
+ xasprintf(&envp[n++], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[n++], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[n++], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[n++], "NODE=%s", owner->name);
+
+ if(owner != myself) {
+ sockaddr2str(&owner->address, &address, &port);
+ xasprintf(&envp[n++], "REMOTEADDRESS=%s", address);
+ xasprintf(&envp[n++], "REMOTEPORT=%s", port);
+ free(port);
+ free(address);
+ }
+
+ xasprintf(&envp[n++], "NAME=%s", myself->name);
+
+ name = up ? "subnet-up" : "subnet-down";
+
+ if(!subnet) {
+ for splay_each(subnet_t, subnet, owner->subnet_tree) {
+ if(!net2str(netstr, sizeof netstr, subnet))
+ continue;
+
+ // Strip the weight from the subnet, and put it in its own environment variable
+ char *weight = strchr(netstr, '#');
+ if(weight)
+ *weight++ = 0;
+ else
+ weight = empty;
+
+ // Prepare the SUBNET and WEIGHT variables
+ free(envp[n]);
+ free(envp[n + 1]);
+ xasprintf(&envp[n], "SUBNET=%s", netstr);
+ xasprintf(&envp[n + 1], "WEIGHT=%s", weight);
+
+ execute_script(name, envp);
+ }
+ } else {
+ if(net2str(netstr, sizeof netstr, subnet)) {
+ // Strip the weight from the subnet, and put it in its own environment variable
+ char *weight = strchr(netstr, '#');
+ if(weight)
+ *weight++ = 0;
+ else
+ weight = empty;
+
+ // Prepare the SUBNET and WEIGHT variables
+ xasprintf(&envp[n], "SUBNET=%s", netstr);
+ xasprintf(&envp[n + 1], "WEIGHT=%s", weight);
+
+ execute_script(name, envp);
+ }
+ }
+
+ for(int i = 0; envp[i] && i < 9; i++)
+ free(envp[i]);
}
-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
+bool dump_subnets(connection_t *c) {
+ for splay_each(subnet_t, subnet, subnet_tree) {
+ char netstr[MAXNETSTR];
+
+ if(!net2str(netstr, sizeof netstr, subnet))
+ continue;
+
+ send_request(c, "%d %d %s %s",
+ CONTROL, REQ_DUMP_SUBNETS,
+ netstr, subnet->owner ? subnet->owner->name : "(broadcast)");
+ }
+
+ return send_request(c, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
}
projects / tinc / blobdiff