--- /dev/null
+/*
+ protocol_subnet.c -- handle the meta-protocol, subnets
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+
+ 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: protocol_subnet.c,v 1.1 2002/04/28 12:46:26 zarq Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+
+#include "conf.h"
+#include "interface.h"
+#include "net.h"
+#include "netutl.h"
+#include "protocol.h"
+#include "meta.h"
+#include "connection.h"
+#include "node.h"
+#include "edge.h"
+#include "graph.h"
+#include "logging.h"
+
+#include "system.h"
+
+int send_add_subnet(connection_t *c, subnet_t *subnet)
+{
+ int x;
+ char *netstr;
+cp
+ x = send_request(c, "%d %lx %s %s", ADD_SUBNET, random(),
+ subnet->owner->name, netstr = net2str(subnet));
+ free(netstr);
+cp
+ return x;
+}
+
+int add_subnet_h(connection_t *c)
+{
+ char subnetstr[MAX_STRING_SIZE];
+ char name[MAX_STRING_SIZE];
+ node_t *owner;
+ connection_t *other;
+ subnet_t *s;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, name, subnetstr) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_SUBNET", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if owner name is a valid */
+
+ if(check_id(name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Check if subnet string is valid */
+
+ if(!(s = str2net(subnetstr)))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid subnet string"));
+ return -1;
+ }
+
+ if(seen_request(c->buffer))
+ return 0;
+
+ /* Check if the owner of the new subnet is in the connection list */
+
+ owner = lookup_node(name);
+
+ if(!owner)
+ {
+ owner = new_node();
+ owner->name = xstrdup(name);
+ node_add(owner);
+ }
+
+ /* Check if we already know this subnet */
+
+ if(lookup_subnet(owner, s))
+ {
+ free_subnet(s);
+ return 0;
+ }
+
+ /* If we don't know this subnet, but we are the owner, retaliate with a DEL_SUBNET */
+
+ if(owner == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "ADD_SUBNET", c->name, c->hostname);
+ s->owner = myself;
+ send_del_subnet(c, s);
+ return 0;
+ }
+
+ /* If everything is correct, add the subnet to the list of the owner */
+
+ subnet_add(owner, s);
+
+ /* Tell the rest */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_request(other, "%s", c->buffer);
+ }
+cp
+ return 0;
+}
+
+int send_del_subnet(connection_t *c, subnet_t *s)
+{
+ int x;
+ char *netstr;
+cp
+ netstr = net2str(s);
+ x = send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr);
+ free(netstr);
+cp
+ return x;
+}
+
+int del_subnet_h(connection_t *c)
+{
+ char subnetstr[MAX_STRING_SIZE];
+ char name[MAX_STRING_SIZE];
+ node_t *owner;
+ connection_t *other;
+ subnet_t *s, *find;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, name, subnetstr) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if owner name is a valid */
+
+ if(check_id(name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Check if the owner of the new subnet is in the connection list */
+
+ if(!(owner = lookup_node(name)))
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which is not in our node tree"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return 0;
+ }
+
+ /* Check if subnet string is valid */
+
+ if(!(s = str2net(subnetstr)))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid subnet string"));
+ return -1;
+ }
+
+ if(seen_request(c->buffer))
+ return 0;
+
+ /* If everything is correct, delete the subnet from the list of the owner */
+
+ s->owner = owner;
+
+ find = lookup_subnet(owner, s);
+
+ free_subnet(s);
+
+ if(!find)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which does not appear in his subnet tree"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return 0;
+ }
+
+ /* If we are the owner of this subnet, retaliate with an ADD_SUBNET */
+
+ if(owner == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "DEL_SUBNET", c->name, c->hostname);
+ send_add_subnet(c, find);
+ return 0;
+ }
+
+ /* Tell the rest */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_request(other, "%s", c->buffer);
+ }
+
+ /* Finally, delete it. */
+
+ subnet_del(owner, find);
+
+cp
+ return 0;
+}
projects / tinc / blobdiff