/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
- 2000 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2000-2013 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 1.1.2.3 2000/10/11 22:01:02 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 <utils.h>
+#include "system.h"
-#include <xalloc.h>
-#include "subnet.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 "utils.h"
+#include "xalloc.h"
-/* Allocating and freeing space for subnets */
+/* lists type of subnet */
+
+splay_tree_t *subnet_tree;
-subnet_t *new_subnet(void)
-{
-cp
- return (subnet_t *)xmalloc(sizeof(subnet_t));
+/* Subnet lookup cache */
+
+static hash_t *ipv4_cache;
+static hash_t *ipv6_cache;
+static hash_t *mac_cache;
+
+void subnet_cache_flush(void) {
+ hash_clear(ipv4_cache);
+ hash_clear(ipv6_cache);
+ hash_clear(mac_cache);
}
-void free_subnet(subnet_t *subnet)
-{
-cp
- free(subnet);
+/* Initialising trees */
+
+void init_subnets(void) {
+ subnet_tree = splay_alloc_tree((splay_compare_t) subnet_compare, (splay_action_t) free_subnet);
+
+ ipv4_cache = hash_alloc(0x100, sizeof(ipv4_t));
+ ipv6_cache = hash_alloc(0x100, sizeof(ipv6_t));
+ mac_cache = hash_alloc(0x100, sizeof(mac_t));
}
-/* Linked list management */
+void exit_subnets(void) {
+ splay_delete_tree(subnet_tree);
-void subnet_add(conn_list_t *cl, subnet_t *subnet)
-{
-cp
- /* FIXME: do sorting on netmask size if necessary */
+ hash_free(ipv4_cache);
+ hash_free(ipv6_cache);
+ hash_free(mac_cache);
+}
+
+splay_tree_t *new_subnet_tree(void) {
+ return splay_alloc_tree((splay_compare_t) subnet_compare, NULL);
+}
- subnet->next = cl->subnets->next;
- subnet->prev = NULL;
- subnet->next->prev = subnet;
- cl->subnets = subnet;
-cp
+void free_subnet_tree(splay_tree_t *subnet_tree) {
+ splay_delete_tree(subnet_tree);
}
-void subnet_del(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);
-cp
+/* Allocating and freeing space for subnets */
+
+subnet_t *new_subnet(void) {
+ return xzalloc(sizeof(subnet_t));
}
-/* Ascii representation of subnets */
-
-subnet_t *str2net(char *subnetstr)
-{
- int type;
- subnet_t *subnet;
-cp
- if(sscanf(subnetstr, "%d,", &type) != 1)
- return NULL;
-
- subnet = new_subnet();
-
- 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;
- break;
- default:
- free_subnet(subnet);
- return NULL;
- }
-cp
- return subnet;
+void free_subnet(subnet_t *subnet) {
+ free(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]);
- case SUBNET_IPV4:
- asprintf(netstr, "%d,%lx:%lx", subnet->type, subnet->net.ipv4.address, subnet->net.ipv4.mask);
- case SUBNET_IPV6:
- asprintf(netstr, "%d,%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
- 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]);
- default:
- netstr = NULL;
- }
-cp
- return netstr;
+/* Adding and removing subnets */
+
+void subnet_add(node_t *n, subnet_t *subnet) {
+ subnet->owner = n;
+
+ splay_insert(subnet_tree, subnet);
+ if (n)
+ splay_insert(n->subnet_tree, subnet);
+
+ subnet_cache_flush();
+}
+
+void subnet_del(node_t *n, subnet_t *subnet) {
+ if (n)
+ splay_delete(n->subnet_tree, subnet);
+ splay_delete(subnet_tree, subnet);
+
+ subnet_cache_flush();
}
/* Subnet lookup routines */
-subnet_t *lookup_subnet_mac(subnet_t *subnets, mac_t address)
-{
- subnet_t *subnet;
-cp
- for(subnet = subnets; subnet != NULL; subnet = subnet->next)
- {
- if(subnet->type == SUBNET_MAC)
- if(memcmp(&address, &subnet->net.mac.address, sizeof(address)) == 0)
- break;
- }
-cp
- return subnet;
+subnet_t *lookup_subnet(const node_t *owner, const subnet_t *subnet) {
+ return splay_search(owner->subnet_tree, subnet);
}
-subnet_t *lookup_subnet_ipv4(subnet_t *subnets, ipv4_t address)
-{
- subnet_t *subnet;
-cp
- for(subnet = subnets; subnet != NULL; subnet = subnet->next)
- {
- if(subnet->type == SUBNET_IPV4)
- if((address & subnet->net.ipv4.mask) == subnet->net.ipv4.address)
- break;
- }
-cp
- return subnet;
+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
+
+ if(r)
+ hash_insert(mac_cache, address, r);
+
+ return r;
}
-subnet_t *lookup_subnet_ipv6(subnet_t *subnets, ipv6_t address)
-{
- subnet_t *subnet;
- int i;
-cp
- for(subnet = subnets; subnet != NULL; subnet = subnet->next)
- {
- if(subnet->type == SUBNET_IPV6)
- {
- for(i=0; i<8; i++)
- if((address.x[i] & subnet->net.ipv6.mask.x[i]) != subnet->net.ipv6.address.x[i])
- break;
- if(i=8)
- break;
- }
- }
-cp
- return subnet;
+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_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;
+}
+
+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]);
+}
+
+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