X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fsubnet.c;h=534e5b53d562a9f8ae3f820c406622b65143f13b;hb=94f49a163aa570ea272bf3bbd7734187098d88b7;hp=9c225f2129bfbd0df31d571d6712d48830ecb3f1;hpb=2228b16159a7aff64e6559ee1635716154e67fe6;p=tinc diff --git a/src/subnet.c b/src/subnet.c index 9c225f21..534e5b53 100644 --- a/src/subnet.c +++ b/src/subnet.c @@ -1,7 +1,7 @@ /* subnet.c -- handle subnet lookups and lists - Copyright (C) 2000 Guus Sliepen , - 2000 Ivo Timmermans + Copyright (C) 2000-2013 Guus Sliepen , + 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 @@ -13,74 +13,270 @@ 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 1.1.2.1 2000/10/01 03:21:49 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 "subnet.h" +#include "system.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 */ -subnet_t *new_subnet(void) -{ -cp -cp +splay_tree_t *subnet_tree; + +/* Subnet lookup cache */ + +hash_t *ipv4_cache; +hash_t *ipv6_cache; +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 -cp +/* 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 */ - -int subnet_add(conn_list_t *cl, subnet_t *subnet) -{ -cp - subnet->next = cl->subnets->next; - subnet->prev = NULL; - subnet->next->prev = subnet - cl->subnets = subnet; -cp - return 0; +void exit_subnets(void) { + splay_delete_tree(subnet_tree); + + hash_free(ipv4_cache); + hash_free(ipv6_cache); + hash_free(mac_cache); } -int subnet_del(conn_list_t *cl, 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 - return 0; +splay_tree_t *new_subnet_tree(void) { + return splay_alloc_tree((splay_compare_t) subnet_compare, NULL); } -/* Ascii representation of subnets */ +void free_subnet_tree(splay_tree_t *subnet_tree) { + splay_delete_tree(subnet_tree); +} -subnet_t *str2net(char *subnetstr) -{ -cp -cp +/* Allocating and freeing space for subnets */ + +subnet_t *new_subnet(void) { + return xzalloc(sizeof(subnet_t)); } -char *net2str(subnet_t *subnet) -{ -cp -cp +void free_subnet(subnet_t *subnet) { + free(subnet); +} + +/* 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(const node_t *owner, const subnet_t *subnet) { + return splay_search(owner->subnet_tree, 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_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); +}