/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.warande.net>,
- 2000-2002 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2000-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ 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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: subnet.c,v 1.1.2.35 2002/04/26 18:13:00 zarq Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <stdio.h>
-#include <syslog.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
+#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 */
/* 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();
+
+ subnet->owner = n;
- avl_insert(subnet_tree, subnet);
-cp
- avl_insert(n->subnet_tree, subnet);
-cp
+ 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) {
+ if(l < 0 || l > 32)
+ return false;
+
+ subnet->type = SUBNET_IPV4;
+ subnet->net.ipv4.prefixlength = l;
+
+ 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],
+ &l) == 9) {
+ if(l < 0 || l > 128)
+ return false;
+
+ 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++) {
+ 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",
+ &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, exiting!"), 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))
+ break;
+ else {
+ /* Otherwise, see if there is a bigger enclosing subnet */
+
+ subnet.net.ipv4.prefixlength = p->net.ipv4.prefixlength - 1;
+ if(subnet.net.ipv4.prefixlength < 0 || subnet.net.ipv4.prefixlength > 32)
+ return NULL;
+ 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))
+ break;
+ else {
+ /* Otherwise, see if there is a bigger enclosing subnet */
+
+ subnet.net.ipv6.prefixlength = p->net.ipv6.prefixlength - 1;
+ if(subnet.net.ipv6.prefixlength < 0 || subnet.net.ipv6.prefixlength > 128)
+ return NULL;
+ 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."));
}
projects / oweals / tinc.git / blobdiff