X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=lib%2Fsubnet.c;fp=lib%2Fsubnet.c;h=0000000000000000000000000000000000000000;hb=013a2e159e42c46808ea8d0b6abd57525db30a50;hp=fade7547cb0a82ddd2f3e199f05d4ba4b0098455;hpb=efa5148bc76effb440d807d653dda02de050fde0;p=tinc diff --git a/lib/subnet.c b/lib/subnet.c deleted file mode 100644 index fade7547..00000000 --- a/lib/subnet.c +++ /dev/null @@ -1,399 +0,0 @@ -/* - subnet.c -- handle subnet lookups and lists - Copyright (C) 2000-2002 Guus Sliepen , - 2000-2002 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 - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - 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 2002/04/28 12:46:26 zarq Exp $ -*/ - -#include "config.h" - -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#include "conf.h" -#include "net.h" -#include "node.h" -#include "subnet.h" -#include "netutl.h" -#include "logging.h" - -#include "system.h" - -/* lists type of subnet */ - -avl_tree_t *subnet_tree; - -/* Subnet comparison */ - -int subnet_compare_mac(subnet_t *a, subnet_t *b) -{ -cp - return memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t)); -} - -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; - - return a->net.ipv4.prefixlength - b->net.ipv4.prefixlength; -} - -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; - - return a->net.ipv6.prefixlength - b->net.ipv6.prefixlength; -} - -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; -} - -/* 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) -{ -cp - avl_delete_tree(subnet_tree); -cp -} - -avl_tree_t *new_subnet_tree(void) -{ -cp - return avl_alloc_tree((avl_compare_t)subnet_compare, NULL); -cp -} - -void free_subnet_tree(avl_tree_t *subnet_tree) -{ -cp - avl_delete_tree(subnet_tree); -cp -} - -/* Allocating and freeing space for subnets */ - -subnet_t *new_subnet(void) -{ -cp - return (subnet_t *)xmalloc(sizeof(subnet_t)); -} - -void free_subnet(subnet_t *subnet) -{ -cp - free(subnet); -} - -/* Adding and removing subnets */ - -void subnet_add(node_t *n, subnet_t *subnet) -{ -cp - subnet->owner = n; - - avl_insert(subnet_tree, subnet); -cp - avl_insert(n->subnet_tree, subnet); - - run_hooks("subnet-add", subnet); -cp -} - -void subnet_del(node_t *n, subnet_t *subnet) -{ -cp - avl_delete(n->subnet_tree, subnet); -cp - avl_delete(subnet_tree, subnet); - - run_hooks("subnet-del", subnet); -cp -} - -/* Ascii representation of subnets */ - -subnet_t *str2net(char *subnetstr) -{ - int i, l; - subnet_t *subnet; - unsigned short int 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; -} - -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, exitting!"), subnet->type); - cp_trace(); - exit(0); - } -cp - return netstr; -} - -/* 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_mac(mac_t *address) -{ - subnet_t subnet, *p; -cp - subnet.type = SUBNET_MAC; - memcpy(&subnet.net.mac.address, address, sizeof(mac_t)); - - p = (subnet_t *)avl_search(subnet_tree, &subnet); -cp - return p; -} - -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((char *)address, (char *)&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((char *)&subnet.net.ipv4.address, (char *)&p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t)); - } - } - } while (p); -cp - return p; -} - -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((char *)address, (char *)&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((char *)&subnet.net.ipv6.address, (char *)&p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t)); - } - } - } while (p); -cp - return p; -} - -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 -}