/*
protocol_subnet.c -- handle the meta-protocol, subnets
- Copyright (C) 1999-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
- 2000-2005 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 1999-2005 Ivo Timmermans,
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2009 Michael Tokarev <mjt@tls.msk.ru>
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
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.
-
- $Id$
+ 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 "system.h"
#include "utils.h"
#include "xalloc.h"
-bool send_add_subnet(connection_t *c, const subnet_t *subnet)
-{
+bool send_add_subnet(connection_t *c, const subnet_t *subnet) {
char netstr[MAXNETSTR];
- cp();
-
if(!net2str(netstr, sizeof netstr, subnet))
return false;
- return send_request(c, "%d %lx %s %s", ADD_SUBNET, random(), subnet->owner->name, netstr);
+ return send_request(c, "%d %x %s %s", ADD_SUBNET, rand(), subnet->owner->name, netstr);
}
-bool add_subnet_h(connection_t *c)
-{
+bool add_subnet_h(connection_t *c) {
char subnetstr[MAX_STRING_SIZE];
char name[MAX_STRING_SIZE];
node_t *owner;
- subnet_t s = {0}, *new;
-
- cp();
+ subnet_t s = {NULL}, *new, *old;
if(sscanf(c->buffer, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_SUBNET", c->name,
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "ADD_SUBNET", c->name,
c->hostname);
return false;
}
- /* Check if owner name is a valid */
+ /* Check if owner name is valid */
if(!check_id(name)) {
- logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name,
- c->hostname, _("invalid name"));
+ logger(LOG_ERR, "Got bad %s from %s (%s): %s", "ADD_SUBNET", c->name,
+ c->hostname, "invalid name");
return false;
}
/* Check if subnet string is valid */
if(!str2net(&s, subnetstr)) {
- logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name,
- c->hostname, _("invalid subnet string"));
+ logger(LOG_ERR, "Got bad %s from %s (%s): %s", "ADD_SUBNET", c->name,
+ c->hostname, "invalid subnet string");
return false;
}
owner = lookup_node(name);
+ if(tunnelserver && owner != myself && owner != c->node) {
+ /* in case of tunnelserver, ignore indirect subnet registrations */
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Ignoring indirect %s from %s (%s) for %s",
+ "ADD_SUBNET", c->name, c->hostname, subnetstr);
+ return true;
+ }
+
if(!owner) {
owner = new_node();
owner->name = xstrdup(name);
node_add(owner);
}
- if(tunnelserver && owner != myself && owner != c->node)
- return false;
-
/* Check if we already know this subnet */
if(lookup_subnet(owner, &s))
/* If we don't know this subnet, but we are the owner, retaliate with a DEL_SUBNET */
if(owner == myself) {
- ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself"),
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for ourself",
"ADD_SUBNET", c->name, c->hostname);
s.owner = myself;
send_del_subnet(c, &s);
return true;
}
- /* In tunnel server mode, check if the subnet matches one in the config file of this node */
+ /* In tunnel server mode, we should already know all allowed subnets */
if(tunnelserver) {
- config_t *cfg;
- subnet_t *allowed;
-
- for(cfg = lookup_config(c->config_tree, "Subnet"); cfg; cfg = lookup_config_next(c->config_tree, cfg)) {
- if(!get_config_subnet(cfg, &allowed))
- return false;
-
- if(!subnet_compare(&s, allowed))
- break;
-
- free_subnet(allowed);
- }
+ logger(LOG_WARNING, "Ignoring unauthorized %s from %s (%s): %s",
+ "ADD_SUBNET", c->name, c->hostname, subnetstr);
+ return true;
+ }
- if(!cfg)
- return false;
+ /* Ignore if strictsubnets is true, but forward it to others */
- free_subnet(allowed);
+ if(strictsubnets) {
+ logger(LOG_WARNING, "Ignoring unauthorized %s from %s (%s): %s",
+ "ADD_SUBNET", c->name, c->hostname, subnetstr);
+ forward_request(c);
+ return true;
}
/* If everything is correct, add the subnet to the list of the owner */
/* Tell the rest */
- if(!tunnelserver)
- forward_request(c);
+ forward_request(c);
+
+ /* Fast handoff of roaming MAC addresses */
+
+ if(s.type == SUBNET_MAC && owner != myself && (old = lookup_subnet(myself, &s)) && old->expires)
+ old->expires = now;
return true;
}
-bool send_del_subnet(connection_t *c, const subnet_t *s)
-{
+bool send_del_subnet(connection_t *c, const subnet_t *s) {
char netstr[MAXNETSTR];
- cp();
-
if(!net2str(netstr, sizeof netstr, s))
return false;
- return send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr);
+ return send_request(c, "%d %x %s %s", DEL_SUBNET, rand(), s->owner->name, netstr);
}
-bool del_subnet_h(connection_t *c)
-{
+bool del_subnet_h(connection_t *c) {
char subnetstr[MAX_STRING_SIZE];
char name[MAX_STRING_SIZE];
node_t *owner;
- subnet_t s = {0}, *find;
-
- cp();
+ subnet_t s = {NULL}, *find;
if(sscanf(c->buffer, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name,
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "DEL_SUBNET", c->name,
c->hostname);
return false;
}
- /* Check if owner name is a valid */
+ /* Check if owner name is valid */
if(!check_id(name)) {
- logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name,
- c->hostname, _("invalid name"));
+ logger(LOG_ERR, "Got bad %s from %s (%s): %s", "DEL_SUBNET", c->name,
+ c->hostname, "invalid name");
return false;
}
- /* Check if the owner of the new subnet is in the connection list */
+ /* Check if subnet string is valid */
- owner = lookup_node(name);
+ if(!str2net(&s, subnetstr)) {
+ logger(LOG_ERR, "Got bad %s from %s (%s): %s", "DEL_SUBNET", c->name,
+ c->hostname, "invalid subnet string");
+ return false;
+ }
- if(!owner) {
- ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for %s which is not in our node tree"),
- "DEL_SUBNET", c->name, c->hostname, name);
+ if(seen_request(c->buffer))
return true;
- }
- if(tunnelserver && owner != myself && owner != c->node)
- return false;
+ /* Check if the owner of the subnet being deleted is in the connection list */
- /* Check if subnet string is valid */
+ owner = lookup_node(name);
- if(!str2net(&s, subnetstr)) {
- logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name,
- c->hostname, _("invalid subnet string"));
- return false;
+ if(tunnelserver && owner != myself && owner != c->node) {
+ /* in case of tunnelserver, ignore indirect subnet deletion */
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Ignoring indirect %s from %s (%s) for %s",
+ "DEL_SUBNET", c->name, c->hostname, subnetstr);
+ return true;
}
- if(seen_request(c->buffer))
+ if(!owner) {
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for %s which is not in our node tree",
+ "DEL_SUBNET", c->name, c->hostname, name);
return true;
+ }
/* If everything is correct, delete the subnet from the list of the owner */
find = lookup_subnet(owner, &s);
if(!find) {
- ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for %s which does not appear in his subnet tree"),
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for %s which does not appear in his subnet tree",
"DEL_SUBNET", c->name, c->hostname, name);
+ if(strictsubnets)
+ forward_request(c);
return true;
}
/* If we are the owner of this subnet, retaliate with an ADD_SUBNET */
if(owner == myself) {
- ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself"),
+ ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for ourself",
"DEL_SUBNET", c->name, c->hostname);
send_add_subnet(c, find);
return true;
}
+ if(tunnelserver)
+ return true;
+
/* Tell the rest */
- if(!tunnelserver)
- forward_request(c);
+ forward_request(c);
+ if(strictsubnets)
+ return true;
/* Finally, delete it. */
projects / tinc / blobdiff