/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2010 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2000-2012 Guus Sliepen <guus@tinc-vpn.org>,
2000-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
#include "splay_tree.h"
#include "control_common.h"
#include "device.h"
+#include "hash.h"
#include "logger.h"
#include "net.h"
#include "netutl.h"
/* 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;
-
-static mac_t cache_mac_address[2];
-static subnet_t *cache_mac_subnet[2];
-static bool cache_mac_valid[2];
-static int cache_mac_slot;
+hash_t *ipv4_cache;
+hash_t *ipv6_cache;
+hash_t *mac_cache;
void subnet_cache_flush(void) {
- cache_ipv4_valid[0] = cache_ipv4_valid[1] = false;
- cache_ipv6_valid[0] = cache_ipv6_valid[1] = false;
- cache_mac_valid[0] = cache_mac_valid[1] = false;
-}
-
-/* Subnet comparison */
-
-static int subnet_compare_mac(const subnet_t *a, const subnet_t *b) {
- int result;
-
- result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof a->net.mac.address);
-
- if(result)
- return result;
-
- result = a->weight - b->weight;
-
- if(result || !a->owner || !b->owner)
- return result;
-
- return strcmp(a->owner->name, b->owner->name);
-}
-
-static int subnet_compare_ipv4(const subnet_t *a, const subnet_t *b) {
- int result;
-
- result = b->net.ipv4.prefixlength - a->net.ipv4.prefixlength;
-
- if(result)
- return result;
-
- 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;
-
- return strcmp(a->owner->name, b->owner->name);
-}
-
-static int subnet_compare_ipv6(const subnet_t *a, const subnet_t *b) {
- int result;
-
- 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));
-
- if(result)
- return result;
-
- result = a->weight - b->weight;
-
- if(result || !a->owner || !b->owner)
- return result;
-
- return strcmp(a->owner->name, b->owner->name);
-}
-
-int subnet_compare(const subnet_t *a, const subnet_t *b) {
- int result;
-
- 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:
- logger(LOG_ERR, "subnet_compare() was called with unknown subnet type %d, exitting!",
- a->type);
- exit(0);
- }
-
- return 0;
+ hash_clear(ipv4_cache);
+ hash_clear(ipv6_cache);
+ hash_clear(mac_cache);
}
/* Initialising trees */
void init_subnets(void) {
subnet_tree = splay_alloc_tree((splay_compare_t) subnet_compare, (splay_action_t) free_subnet);
- subnet_cache_flush();
+ ipv4_cache = hash_alloc(0x100, sizeof(ipv4_t));
+ ipv6_cache = hash_alloc(0x100, sizeof(ipv6_t));
+ mac_cache = hash_alloc(0x100, sizeof(mac_t));
}
void exit_subnets(void) {
splay_delete_tree(subnet_tree);
+
+ hash_free(ipv4_cache);
+ hash_free(ipv6_cache);
+ hash_free(mac_cache);
}
splay_tree_t *new_subnet_tree(void) {
subnet_cache_flush();
}
-/* Ascii representation of subnets */
-
-bool str2net(subnet_t *subnet, const char *subnetstr) {
- int i, l;
- uint16_t x[8];
- int weight = 10;
-
- 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++) {
- 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#%d",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7],
- &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#%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++) {
- 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",
- &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#%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];
-
- return true;
- }
-
- return false;
-}
-
-bool net2str(char *netstr, int len, const subnet_t *subnet) {
- if(!netstr || !subnet) {
- logger(LOG_ERR, "net2str() was called with netstr=%p, subnet=%p!", netstr, subnet);
- return false;
- }
-
- switch (subnet->type) {
- case SUBNET_MAC:
- 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->weight);
- break;
-
- case SUBNET_IPV4:
- 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->weight);
- break;
-
- case SUBNET_IPV6:
- 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[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,
- subnet->weight);
- break;
-
- default:
- logger(LOG_ERR,
- "net2str() was called with unknown subnet type %d, exiting!",
- subnet->type);
- exit(0);
- }
-
- return true;
-}
-
/* Subnet lookup routines */
subnet_t *lookup_subnet(const node_t *owner, const subnet_t *subnet) {
subnet_t *lookup_subnet_mac(const node_t *owner, const mac_t *address) {
subnet_t *p, *r = NULL;
splay_node_t *n;
- int i;
// Check if this address is cached
- for(i = 0; i < 2; i++) {
- if(!cache_mac_valid[i])
- continue;
- if(owner && cache_mac_subnet[i] && cache_mac_subnet[i]->owner != owner)
- continue;
- if(!memcmp(address, &cache_mac_address[i], sizeof *address))
- return cache_mac_subnet[i];
- }
+ if((r = hash_search(mac_cache, address)))
+ return r;
// Search all subnets for a matching one
// Cache the result
- cache_mac_slot = !cache_mac_slot;
- memcpy(&cache_mac_address[cache_mac_slot], address, sizeof *address);
- cache_mac_subnet[cache_mac_slot] = r;
- cache_mac_valid[cache_mac_slot] = true;
+ if(r)
+ hash_insert(mac_cache, address, r);
return r;
}
subnet_t *lookup_subnet_ipv4(const ipv4_t *address) {
subnet_t *p, *r = NULL;
splay_node_t *n;
- int i;
// 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];
- }
+ if((r = hash_search(ipv4_cache, address)))
+ return r;
// Search all subnets for a matching one
// Cache the result
- 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;
+ if(r)
+ hash_insert(ipv4_cache, address, r);
return r;
}
subnet_t *lookup_subnet_ipv6(const ipv6_t *address) {
subnet_t *p, *r = NULL;
splay_node_t *n;
- int i;
// 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];
- }
+ if((r = hash_search(ipv6_cache, address)))
+ return r;
// Search all subnets for a matching one
// Cache the result
- 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(r)
+ hash_insert(ipv6_cache, address, r);
return r;
}
// 4 and 5 are reserved for SUBNET and WEIGHT
xasprintf(&envp[6], "REMOTEADDRESS=%s", address);
xasprintf(&envp[7], "REMOTEPORT=%s", port);
+ free(port);
+ free(address);
}
name = up ? "subnet-up" : "subnet-down";
subnet = node->data;
if(!net2str(netstr, sizeof netstr, subnet))
continue;
- send_request(c, "%d %d %s owner %s",
+ send_request(c, "%d %d %s %s",
CONTROL, REQ_DUMP_SUBNETS,
netstr, subnet->owner->name);
}