X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fsubnet.c;h=5e096252b8f4806daefd823731d2c5b6306cd0bb;hp=99d97bcdbb4d4dd2aaa5b6e957ccdc78976a8613;hb=ecad9e9289162faec7b678be54178d22876b5d90;hpb=b6298e2c082035b8238ea08673ced15d0fb7b89a diff --git a/src/subnet.c b/src/subnet.c index 99d97bcd..5e096252 100644 --- a/src/subnet.c +++ b/src/subnet.c @@ -1,7 +1,7 @@ /* subnet.c -- handle subnet lookups and lists - Copyright (C) 2000,2001 Guus Sliepen , - 2000,2001 Ivo Timmermans + 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 @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: subnet.c,v 1.1.2.27 2001/10/28 22:42:49 guus Exp $ + $Id: subnet.c,v 1.1.2.33 2002/03/12 14:20:44 guus Exp $ */ #include "config.h" @@ -25,16 +25,22 @@ #include #include #include +#include +#include +#include +#include + +#include +#include +#include #include "conf.h" #include "net.h" #include "node.h" #include "subnet.h" -#include "system.h" +#include "netutl.h" -#include -#include -#include +#include "system.h" /* lists type of subnet */ @@ -44,60 +50,42 @@ avl_tree_t *subnet_tree; int subnet_compare_mac(subnet_t *a, subnet_t *b) { - int result; cp - result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t)); - - if(result) - return result; - - return strcmp(a->owner->name, b->owner->name); + 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 - /* We compare as if a subnet is a number that equals (address << 32 + netmask). */ - - if(a->net.ipv4.address < b->net.ipv4.address) - return -1; - else if(a->net.ipv4.address > b->net.ipv4.address) - return 1; - - if(a->net.ipv4.mask < b->net.ipv4.mask) - return -1; - else if(a->net.ipv4.mask > b->net.ipv4.mask) - return 1; + result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t)); + + if(result) + return result; - return strcmp(a->owner->name, b->owner->name); + return a->net.ipv4.masklength - b->net.ipv4.masklength; } int subnet_compare_ipv6(subnet_t *a, subnet_t *b) { int result; cp - /* Same as ipv4 case, but with nasty 128 bit addresses */ - - result = memcmp(a->net.ipv6.address.x, b->net.ipv6.address.x, sizeof(ipv6_t)); - - if(result) - return result; - - result = memcmp(a->net.ipv6.mask.x, b->net.ipv6.mask.x, sizeof(ipv6_t)); + result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t)); if(result) return result; - return strcmp(a->owner->name, b->owner->name); + return a->net.ipv6.masklength - b->net.ipv6.masklength; } int subnet_compare(subnet_t *a, subnet_t *b) { - int x; + int result; cp - x = a->type - b->type; - if(x) - return x; + result = a->type - b->type; + + if(result) + return result; switch(a->type) { @@ -108,10 +96,12 @@ cp case SUBNET_IPV6: return subnet_compare_ipv6(a, b); default: - syslog(LOG_ERR, _("subnet_compare() was called with unknown subnet type %d, restarting!"), a->type); - sighup = 1; - return 0; + syslog(LOG_ERR, _("subnet_compare() was called with unknown subnet type %d, exitting!"), a->type); + cp_trace(); + exit(0); } + + return 0; } /* Initialising trees */ @@ -158,7 +148,7 @@ cp free(subnet); } -/* Linked list management */ +/* Adding and removing subnets */ void subnet_add(node_t *n, subnet_t *subnet) { @@ -184,65 +174,65 @@ cp subnet_t *str2net(char *subnetstr) { - int type; + int i, l; subnet_t *subnet; -cp - if(sscanf(subnetstr, "%d,", &type) != 1) - return NULL; + unsigned short int x[8]; cp subnet = new_subnet(); cp - switch(type) + if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d", + &x[0], &x[1], &x[2], &x[3], + &l) == 5) { - 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; - default: - free_subnet(subnet); - return NULL; + subnet->type = SUBNET_IPV4; + subnet->net.ipv4.masklength = l; + for(i = 0; i < 4; i++) + subnet->net.ipv4.address.x[i] = x[i]; + return subnet; } -cp - 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.masklength = 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.masklength = 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.masklength = 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) @@ -252,7 +242,7 @@ cp switch(subnet->type) { case SUBNET_MAC: - asprintf(&netstr, "%d,%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", subnet->type, + 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], @@ -261,29 +251,29 @@ cp subnet->net.mac.address.x[5]); break; case SUBNET_IPV4: - asprintf(&netstr, "%d,%lx/%lx", subnet->type, subnet->net.ipv4.address, subnet->net.ipv4.mask); + 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.masklength); break; case SUBNET_IPV6: - asprintf(&netstr, "%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]); + 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.masklength); break; default: - asprintf(&netstr, _("unknown subnet type")); + syslog(LOG_ERR, _("net2str() was called with unknown subnet type %d, exitting!"), subnet->type); + cp_trace(); + exit(0); } cp return netstr; @@ -314,8 +304,8 @@ subnet_t *lookup_subnet_ipv4(ipv4_t *address) subnet_t subnet, *p; cp subnet.type = SUBNET_IPV4; - subnet.net.ipv4.address = *address; - subnet.net.ipv4.mask = 0xFFFFFFFF; + memcpy(&subnet.net.ipv4.address, address, sizeof(ipv4_t)); + subnet.net.ipv4.masklength = 32; do { @@ -327,37 +317,61 @@ cp cp if(p) { - if ((*address & p->net.ipv4.mask) == p->net.ipv4.address) + if(p->type != SUBNET_IPV4) + { + p = NULL; + break; + } + + if (!maskcmp((char *)address, (char *)&p->net.ipv4.address, p->net.ipv4.masklength, sizeof(ipv4_t))) break; else { /* Otherwise, see if there is a bigger enclosing subnet */ - subnet.net.ipv4.mask = p->net.ipv4.mask << 1; - subnet.net.ipv4.address = p->net.ipv4.address & subnet.net.ipv4.mask; + subnet.net.ipv4.masklength = p->net.ipv4.masklength - 1; + maskcpy((char *)&subnet.net.ipv4.address, (char *)&p->net.ipv4.address, subnet.net.ipv4.masklength, sizeof(ipv4_t)); } } - } while (p); - - return p; + } while (p); +cp + return p; } subnet_t *lookup_subnet_ipv6(ipv6_t *address) { subnet_t subnet, *p; - int i; cp subnet.type = SUBNET_IPV6; memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t)); - memset(&subnet.net.ipv6.mask, 0xFF, 16); + subnet.net.ipv6.masklength = 128; - p = (subnet_t *)avl_search_closest_greater(subnet_tree, &subnet); + do + { + /* Go find subnet */ - if(p) - for(i=0; i<8; i++) - if((address->x[i] & p->net.ipv6.address.x[i]) != p->net.ipv6.address.x[i]) - return NULL; + 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.masklength, sizeof(ipv6_t))) + break; + else + { + /* Otherwise, see if there is a bigger enclosing subnet */ + + subnet.net.ipv6.masklength = p->net.ipv6.masklength - 1; + maskcpy((char *)&subnet.net.ipv6.address, (char *)&p->net.ipv6.address, subnet.net.ipv6.masklength, sizeof(ipv6_t)); + } + } + } while (p); +cp return p; } @@ -372,7 +386,7 @@ cp { subnet = (subnet_t *)node->data; netstr = net2str(subnet); - syslog(LOG_DEBUG, " %s owner %s", netstr, subnet->owner->name); + syslog(LOG_DEBUG, _(" %s owner %s"), netstr, subnet->owner->name); free(netstr); } syslog(LOG_DEBUG, _("End of subnet list."));