X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fsubnet.c;h=3652cd3a8946afa341f5cb750badeb370ca86d1a;hp=0320957fc99e150d258eceb119205b46709bfa61;hb=92c4a28d7d43b68a324cf2eca741298ed6b692d6;hpb=5df8a8cb3f4a0d2290f6677b44bbcaaf27a60bbc diff --git a/src/subnet.c b/src/subnet.c index 0320957f..3652cd3a 100644 --- a/src/subnet.c +++ b/src/subnet.c @@ -1,7 +1,7 @@ /* subnet.c -- handle subnet lookups and lists - Copyright (C) 2000-2002 Guus Sliepen , - 2000-2002 Ivo Timmermans + Copyright (C) 2000-2004 Guus Sliepen , + 2000-2004 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 @@ -17,30 +17,21 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: subnet.c,v 1.1.2.34 2002/04/09 11:42:48 guus Exp $ + $Id$ */ -#include "config.h" - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include +#include "system.h" -#include "conf.h" +#include "avl_tree.h" +#include "device.h" +#include "logger.h" #include "net.h" +#include "netutl.h" #include "node.h" +#include "process.h" #include "subnet.h" -#include "netutl.h" - -#include "system.h" +#include "utils.h" +#include "xalloc.h" /* lists type of subnet */ @@ -48,347 +39,421 @@ avl_tree_t *subnet_tree; /* Subnet comparison */ -int subnet_compare_mac(subnet_t *a, subnet_t *b) +static int subnet_compare_mac(const subnet_t *a, const subnet_t *b) { -cp - return memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t)); + int result; + + result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t)); + + if(result || !a->owner || !b->owner) + return result; + + return strcmp(a->owner->name, b->owner->name); } -int subnet_compare_ipv4(subnet_t *a, subnet_t *b) +static int subnet_compare_ipv4(const subnet_t *a, const 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 result; + + result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t)); + + if(result) + return result; + + result = a->net.ipv4.prefixlength - b->net.ipv4.prefixlength; + + if(result || !a->owner || !b->owner) + return result; + + return strcmp(a->owner->name, b->owner->name); } -int subnet_compare_ipv6(subnet_t *a, subnet_t *b) +static int subnet_compare_ipv6(const subnet_t *a, const 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 result; + + result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t)); + + if(result) + return result; + + result = a->net.ipv6.prefixlength - b->net.ipv6.prefixlength; + + if(result || !a->owner || !b->owner) + return result; + + return strcmp(a->owner->name, b->owner->name); } -int subnet_compare(subnet_t *a, subnet_t *b) +int subnet_compare(const subnet_t *a, const 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; + 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); + 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 + cp(); + + subnet_tree = avl_alloc_tree((avl_compare_t) subnet_compare, (avl_action_t) free_subnet); } void exit_subnets(void) { -cp - avl_delete_tree(subnet_tree); -cp + cp(); + + avl_delete_tree(subnet_tree); } avl_tree_t *new_subnet_tree(void) { -cp - return avl_alloc_tree((avl_compare_t)subnet_compare, NULL); -cp + cp(); + + return avl_alloc_tree((avl_compare_t) subnet_compare, NULL); } void free_subnet_tree(avl_tree_t *subnet_tree) { -cp - avl_delete_tree(subnet_tree); -cp + cp(); + + avl_delete_tree(subnet_tree); } /* Allocating and freeing space for subnets */ subnet_t *new_subnet(void) { -cp - return (subnet_t *)xmalloc(sizeof(subnet_t)); + cp(); + + return xmalloc_and_zero(sizeof(subnet_t)); } void free_subnet(subnet_t *subnet) { -cp - free(subnet); + cp(); + + free(subnet); } /* Adding and removing subnets */ void subnet_add(node_t *n, subnet_t *subnet) { -cp - subnet->owner = n; + cp(); - avl_insert(subnet_tree, subnet); -cp - avl_insert(n->subnet_tree, subnet); -cp + subnet->owner = n; + + avl_insert(subnet_tree, subnet); + avl_insert(n->subnet_tree, subnet); } void subnet_del(node_t *n, subnet_t *subnet) { -cp - avl_delete(n->subnet_tree, subnet); -cp - avl_delete(subnet_tree, subnet); -cp + cp(); + + avl_delete(n->subnet_tree, subnet); + avl_delete(subnet_tree, subnet); } /* Ascii representation of subnets */ -subnet_t *str2net(char *subnetstr) +bool str2net(subnet_t *subnet, const 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; + int i, l; + uint16_t x[8]; + + 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 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], + &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 true; + } + + 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 true; + } + + 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 true; + } + + 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 true; + } + + return false; } -char *net2str(subnet_t *subnet) +bool net2str(char *netstr, int len, const 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; + cp(); + + if(!netstr || !subnet) { + logger(LOG_ERR, _("net2str() was called with netstr=%p, subnet=%p!\n"), netstr, subnet); + return false; + } + + switch (subnet->type) { + case SUBNET_MAC: + snprintf(netstr, len, "%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: + snprintf(netstr, len, "%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: + snprintf(netstr, len, "%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: + logger(LOG_ERR, + _("net2str() was called with unknown subnet type %d, exiting!"), + subnet->type); + cp_trace(); + exit(0); + } + + return true; } /* Subnet lookup routines */ -subnet_t *lookup_subnet(node_t *owner, subnet_t *subnet) +subnet_t *lookup_subnet(const node_t *owner, const subnet_t *subnet) { -cp - return avl_search(owner->subnet_tree, subnet); + cp(); + + return avl_search(owner->subnet_tree, subnet); } -subnet_t *lookup_subnet_mac(mac_t *address) +subnet_t *lookup_subnet_mac(const 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 *p, subnet = {0}; + + cp(); + + subnet.type = SUBNET_MAC; + subnet.net.mac.address = *address; + subnet.owner = NULL; + + p = avl_search(subnet_tree, &subnet); + + return p; } -subnet_t *lookup_subnet_ipv4(ipv4_t *address) +subnet_t *lookup_subnet_ipv4(const 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 *p, subnet = {0}; + + cp(); + + subnet.type = SUBNET_IPV4; + subnet.net.ipv4.address = *address; + subnet.net.ipv4.prefixlength = 32; + subnet.owner = NULL; + + do { + /* Go find subnet */ + + p = avl_search_closest_smaller(subnet_tree, &subnet); + + /* Check if the found subnet REALLY matches */ + + if(p) { + if(p->type != SUBNET_IPV4) { + p = NULL; + break; + } + + if(!maskcmp(address, &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(&subnet.net.ipv4.address, &p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t)); + } + } + } while(p); + + return p; } -subnet_t *lookup_subnet_ipv6(ipv6_t *address) +subnet_t *lookup_subnet_ipv6(const 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; + subnet_t *p, subnet = {0}; + + cp(); + + subnet.type = SUBNET_IPV6; + subnet.net.ipv6.address = *address; + subnet.net.ipv6.prefixlength = 128; + subnet.owner = NULL; + + do { + /* Go find subnet */ + + p = avl_search_closest_smaller(subnet_tree, &subnet); + + /* Check if the found subnet REALLY matches */ + + if(p) { + if(p->type != SUBNET_IPV6) + return NULL; + + if(!maskcmp(address, &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(&subnet.net.ipv6.address, &p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t)); + } + } + } while(p); + + return p; +} + +void subnet_update(node_t *owner, subnet_t *subnet, bool up) { + avl_node_t *node; + int i; + char *envp[8]; + char netstr[MAXNETSTR + 7] = "SUBNET="; + char *name, *address, *port; + + asprintf(&envp[0], "NETNAME=%s", netname ? : ""); + asprintf(&envp[1], "DEVICE=%s", device ? : ""); + asprintf(&envp[2], "INTERFACE=%s", iface ? : ""); + asprintf(&envp[3], "NODE=%s", owner->name); + + if(owner != myself) { + sockaddr2str(&owner->address, &address, &port); + asprintf(&envp[4], "REMOTEADDRESS=%s", address); + asprintf(&envp[5], "REMOTEPORT=%s", port); + envp[6] = netstr; + envp[7] = NULL; + } else { + envp[4] = netstr; + envp[5] = NULL; + } + + name = up ? "subnet-up" : "subnet-down"; + + if(!subnet) { + for(node = owner->subnet_tree->head; node; node = node->next) { + subnet = node->data; + if(!net2str(netstr + 7, sizeof netstr - 7, subnet)) + continue; + execute_script(name, envp); + } + } else { + if(net2str(netstr + 7, sizeof netstr - 7, subnet)) + execute_script(name, envp); + } + + for(i = 0; i < (owner != myself ? 6 : 4); i++) + free(envp[i]); + + if(owner != myself) { + free(address); + free(port); + } } 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 + char netstr[MAXNETSTR]; + subnet_t *subnet; + avl_node_t *node; + + cp(); + + logger(LOG_DEBUG, _("Subnet list:")); + + for(node = subnet_tree->head; node; node = node->next) { + subnet = node->data; + if(!net2str(netstr, sizeof netstr, subnet)) + continue; + logger(LOG_DEBUG, _(" %s owner %s"), netstr, subnet->owner->name); + } + + logger(LOG_DEBUG, _("End of subnet list.")); }