2002-02-11 10:05:58 +00:00
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/*
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protocol_auth.c -- handle the meta-protocol, authentication
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2006-04-26 13:52:58 +00:00
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Copyright (C) 1999-2005 Ivo Timmermans,
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2009-03-05 13:12:36 +00:00
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2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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2002-02-11 10:05:58 +00:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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2009-09-24 22:01:00 +00:00
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2002-02-11 10:05:58 +00:00
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*/
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2003-07-17 15:06:27 +00:00
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#include "system.h"
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2002-02-11 10:05:58 +00:00
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#include <openssl/sha.h>
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#include <openssl/rand.h>
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2003-10-11 12:16:13 +00:00
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#include <openssl/err.h>
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2002-02-11 10:05:58 +00:00
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#include <openssl/evp.h>
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2003-07-17 15:06:27 +00:00
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#include "avl_tree.h"
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2002-02-11 10:05:58 +00:00
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#include "conf.h"
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#include "connection.h"
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2002-09-04 13:48:52 +00:00
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#include "edge.h"
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#include "graph.h"
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2003-07-06 22:11:37 +00:00
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#include "logger.h"
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2003-07-17 15:06:27 +00:00
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#include "net.h"
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#include "netutl.h"
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#include "node.h"
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#include "protocol.h"
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#include "utils.h"
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#include "xalloc.h"
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2002-02-11 10:05:58 +00:00
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2009-09-24 22:14:03 +00:00
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bool send_id(connection_t *c) {
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2002-09-09 21:25:28 +00:00
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return send_request(c, "%d %s %d", ID, myself->connection->name,
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myself->connection->protocol_version);
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2002-02-11 10:05:58 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool id_h(connection_t *c) {
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2002-09-09 21:25:28 +00:00
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char name[MAX_STRING_SIZE];
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if(sscanf(c->buffer, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Got bad %s from %s (%s)", "ID", c->name,
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2002-09-09 21:25:28 +00:00
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c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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/* Check if identity is a valid name */
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2003-07-22 20:55:21 +00:00
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if(!check_id(name)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Got bad %s from %s (%s): %s", "ID", c->name,
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2002-09-09 21:25:28 +00:00
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c->hostname, "invalid name");
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2007-05-16 14:42:08 +00:00
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/* If this is an outgoing connection, make sure we are connected to the right host */
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2002-09-09 21:25:28 +00:00
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2007-05-16 14:42:08 +00:00
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if(c->outgoing) {
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2002-09-09 21:25:28 +00:00
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if(strcmp(c->name, name)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Peer %s is %s instead of %s", c->hostname, name,
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2002-09-09 21:25:28 +00:00
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c->name);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2005-05-04 15:51:45 +00:00
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} else {
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if(c->name)
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free(c->name);
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2002-09-09 21:25:28 +00:00
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c->name = xstrdup(name);
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2005-05-04 15:51:45 +00:00
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}
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2002-09-09 21:25:28 +00:00
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/* Check if version matches */
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if(c->protocol_version != myself->connection->protocol_version) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Peer %s (%s) uses incompatible version %d",
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2002-09-09 21:25:28 +00:00
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c->name, c->hostname, c->protocol_version);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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if(bypass_security) {
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if(!c->config_tree)
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init_configuration(&c->config_tree);
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c->allow_request = ACK;
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return send_ack(c);
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}
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if(!c->config_tree) {
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init_configuration(&c->config_tree);
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2003-07-22 20:55:21 +00:00
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if(!read_connection_config(c)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Peer %s had unknown identity (%s)", c->hostname,
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2002-09-09 21:25:28 +00:00
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c->name);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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}
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2003-07-22 20:55:21 +00:00
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if(!read_rsa_public_key(c)) {
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return false;
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2002-09-09 21:25:28 +00:00
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}
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c->allow_request = METAKEY;
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return send_metakey(c);
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2002-02-11 10:05:58 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool send_metakey(connection_t *c) {
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2005-06-03 10:16:03 +00:00
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char *buffer;
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2003-07-22 20:55:21 +00:00
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int len;
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bool x;
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2002-09-09 21:25:28 +00:00
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len = RSA_size(c->rsa_key);
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/* Allocate buffers for the meta key */
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2005-06-03 10:16:03 +00:00
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buffer = alloca(2 * len + 1);
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2009-05-24 17:35:51 +00:00
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c->outkey = xrealloc(c->outkey, len);
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2002-09-09 21:25:28 +00:00
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if(!c->outctx)
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2003-01-17 00:37:20 +00:00
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c->outctx = xmalloc_and_zero(sizeof(*c->outctx));
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2009-09-24 22:33:04 +00:00
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2002-09-09 21:25:28 +00:00
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/* Copy random data to the buffer */
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2006-03-19 13:06:21 +00:00
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RAND_pseudo_bytes((unsigned char *)c->outkey, len);
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2002-09-09 21:25:28 +00:00
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/* The message we send must be smaller than the modulus of the RSA key.
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By definition, for a key of k bits, the following formula holds:
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2^(k-1) <= modulus < 2^(k)
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Where ^ means "to the power of", not "xor".
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This means that to be sure, we must choose our message < 2^(k-1).
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This can be done by setting the most significant bit to zero.
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*/
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c->outkey[0] &= 0x7F;
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2003-07-12 17:41:48 +00:00
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ifdebug(SCARY_THINGS) {
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2002-09-09 21:25:28 +00:00
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bin2hex(c->outkey, buffer, len);
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buffer[len * 2] = '\0';
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2009-09-24 22:54:07 +00:00
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logger(LOG_DEBUG, "Generated random meta key (unencrypted): %s",
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2002-09-09 21:25:28 +00:00
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buffer);
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}
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/* Encrypt the random data
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We do not use one of the PKCS padding schemes here.
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This is allowed, because we encrypt a totally random string
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with a length equal to that of the modulus of the RSA key.
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*/
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2006-03-19 13:06:21 +00:00
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if(RSA_public_encrypt(len, (unsigned char *)c->outkey, (unsigned char *)buffer, c->rsa_key, RSA_NO_PADDING) != len) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Error during encryption of meta key for %s (%s)",
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2002-09-09 21:25:28 +00:00
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c->name, c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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/* Convert the encrypted random data to a hexadecimal formatted string */
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bin2hex(buffer, buffer, len);
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buffer[len * 2] = '\0';
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/* Send the meta key */
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x = send_request(c, "%d %d %d %d %d %s", METAKEY,
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c->outcipher ? c->outcipher->nid : 0,
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c->outdigest ? c->outdigest->type : 0, c->outmaclength,
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c->outcompression, buffer);
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/* Further outgoing requests are encrypted with the key we just generated */
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if(c->outcipher) {
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2003-10-11 12:16:13 +00:00
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if(!EVP_EncryptInit(c->outctx, c->outcipher,
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2006-03-19 13:06:21 +00:00
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(unsigned char *)c->outkey + len - c->outcipher->key_len,
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(unsigned char *)c->outkey + len - c->outcipher->key_len -
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2003-10-11 12:16:13 +00:00
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c->outcipher->iv_len)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Error during initialisation of cipher for %s (%s): %s",
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2003-10-11 12:16:13 +00:00
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c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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2002-09-09 21:25:28 +00:00
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2003-07-22 20:55:21 +00:00
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c->status.encryptout = true;
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2002-09-09 21:25:28 +00:00
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}
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return x;
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2002-02-11 10:05:58 +00:00
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}
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2009-09-24 22:14:03 +00:00
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bool metakey_h(connection_t *c) {
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2002-09-09 21:25:28 +00:00
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char buffer[MAX_STRING_SIZE];
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int cipher, digest, maclength, compression;
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int len;
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2003-01-17 00:37:20 +00:00
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if(sscanf(c->buffer, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, buffer) != 5) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Got bad %s from %s (%s)", "METAKEY", c->name,
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2002-09-09 21:25:28 +00:00
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c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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len = RSA_size(myself->connection->rsa_key);
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/* Check if the length of the meta key is all right */
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if(strlen(buffer) != len * 2) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Possible intruder %s (%s): %s", c->name, c->hostname, "wrong keylength");
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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/* Allocate buffers for the meta key */
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2009-05-24 17:35:51 +00:00
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c->inkey = xrealloc(c->inkey, len);
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2002-09-09 21:25:28 +00:00
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if(!c->inctx)
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2003-01-17 00:37:20 +00:00
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c->inctx = xmalloc_and_zero(sizeof(*c->inctx));
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2002-09-09 21:25:28 +00:00
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/* Convert the challenge from hexadecimal back to binary */
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hex2bin(buffer, buffer, len);
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/* Decrypt the meta key */
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2006-03-19 13:06:21 +00:00
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if(RSA_private_decrypt(len, (unsigned char *)buffer, (unsigned char *)c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Error during decryption of meta key for %s (%s)",
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2002-09-09 21:25:28 +00:00
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c->name, c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2003-07-12 17:41:48 +00:00
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ifdebug(SCARY_THINGS) {
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2002-09-09 21:25:28 +00:00
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bin2hex(c->inkey, buffer, len);
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buffer[len * 2] = '\0';
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2009-09-24 22:54:07 +00:00
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logger(LOG_DEBUG, "Received random meta key (unencrypted): %s", buffer);
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2002-02-20 19:25:09 +00:00
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}
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2002-09-09 21:25:28 +00:00
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/* All incoming requests will now be encrypted. */
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/* Check and lookup cipher and digest algorithms */
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if(cipher) {
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c->incipher = EVP_get_cipherbynid(cipher);
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2003-01-17 00:37:20 +00:00
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2002-09-09 21:25:28 +00:00
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if(!c->incipher) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "%s (%s) uses unknown cipher!", c->name, c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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2003-10-11 12:16:13 +00:00
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if(!EVP_DecryptInit(c->inctx, c->incipher,
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2006-03-19 13:06:21 +00:00
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(unsigned char *)c->inkey + len - c->incipher->key_len,
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(unsigned char *)c->inkey + len - c->incipher->key_len -
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2003-10-11 12:16:13 +00:00
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c->incipher->iv_len)) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Error during initialisation of cipher from %s (%s): %s",
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2003-10-11 12:16:13 +00:00
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c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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2002-09-09 21:25:28 +00:00
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2003-07-22 20:55:21 +00:00
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c->status.decryptin = true;
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2002-09-09 21:25:28 +00:00
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} else {
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c->incipher = NULL;
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2002-02-20 19:25:09 +00:00
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}
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2002-09-09 21:25:28 +00:00
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c->inmaclength = maclength;
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if(digest) {
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c->indigest = EVP_get_digestbynid(digest);
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if(!c->indigest) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "Node %s (%s) uses unknown digest!", c->name, c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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if(c->inmaclength > c->indigest->md_size || c->inmaclength < 0) {
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2009-09-24 22:54:07 +00:00
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logger(LOG_ERR, "%s (%s) uses bogus MAC length!", c->name, c->hostname);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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} else {
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c->indigest = NULL;
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2002-02-20 19:25:09 +00:00
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}
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2002-09-09 21:25:28 +00:00
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c->incompression = compression;
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|
|
c->allow_request = CHALLENGE;
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
return send_challenge(c);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool send_challenge(connection_t *c) {
|
2005-06-03 10:16:03 +00:00
|
|
|
char *buffer;
|
2003-07-22 20:55:21 +00:00
|
|
|
int len;
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* CHECKME: what is most reasonable value for len? */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
len = RSA_size(c->rsa_key);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Allocate buffers for the challenge */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2005-06-03 10:16:03 +00:00
|
|
|
buffer = alloca(2 * len + 1);
|
|
|
|
|
2009-05-24 17:35:51 +00:00
|
|
|
c->hischallenge = xrealloc(c->hischallenge, len);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Copy random data to the buffer */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2006-03-19 13:06:21 +00:00
|
|
|
RAND_pseudo_bytes((unsigned char *)c->hischallenge, len);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Convert to hex */
|
|
|
|
|
|
|
|
bin2hex(c->hischallenge, buffer, len);
|
|
|
|
buffer[len * 2] = '\0';
|
|
|
|
|
|
|
|
/* Send the challenge */
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
return send_request(c, "%d %s", CHALLENGE, buffer);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool challenge_h(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
char buffer[MAX_STRING_SIZE];
|
|
|
|
int len;
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
if(sscanf(c->buffer, "%*d " MAX_STRING, buffer) != 1) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Got bad %s from %s (%s)", "CHALLENGE", c->name,
|
2002-09-09 21:25:28 +00:00
|
|
|
c->hostname);
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
len = RSA_size(myself->connection->rsa_key);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Check if the length of the challenge is all right */
|
|
|
|
|
|
|
|
if(strlen(buffer) != len * 2) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Possible intruder %s (%s): %s", c->name,
|
2002-09-09 21:25:28 +00:00
|
|
|
c->hostname, "wrong challenge length");
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Allocate buffers for the challenge */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2009-05-24 17:35:51 +00:00
|
|
|
c->mychallenge = xrealloc(c->mychallenge, len);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Convert the challenge from hexadecimal back to binary */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
hex2bin(buffer, c->mychallenge, len);
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
c->allow_request = CHAL_REPLY;
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Rest is done by send_chal_reply() */
|
|
|
|
|
|
|
|
return send_chal_reply(c);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool send_chal_reply(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
char hash[EVP_MAX_MD_SIZE * 2 + 1];
|
|
|
|
EVP_MD_CTX ctx;
|
|
|
|
|
|
|
|
/* Calculate the hash from the challenge we received */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2003-10-11 12:16:13 +00:00
|
|
|
if(!EVP_DigestInit(&ctx, c->indigest)
|
2003-10-11 12:28:48 +00:00
|
|
|
|| !EVP_DigestUpdate(&ctx, c->mychallenge, RSA_size(myself->connection->rsa_key))
|
2006-03-19 13:06:21 +00:00
|
|
|
|| !EVP_DigestFinal(&ctx, (unsigned char *)hash, NULL)) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Error during calculation of response for %s (%s): %s",
|
2003-10-11 12:16:13 +00:00
|
|
|
c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
|
|
|
|
return false;
|
|
|
|
}
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Convert the hash to a hexadecimal formatted string */
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
bin2hex(hash, hash, c->indigest->md_size);
|
|
|
|
hash[c->indigest->md_size * 2] = '\0';
|
2002-02-11 10:05:58 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Send the reply */
|
|
|
|
|
|
|
|
return send_request(c, "%d %s", CHAL_REPLY, hash);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool chal_reply_h(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
char hishash[MAX_STRING_SIZE];
|
|
|
|
char myhash[EVP_MAX_MD_SIZE];
|
|
|
|
EVP_MD_CTX ctx;
|
|
|
|
|
|
|
|
if(sscanf(c->buffer, "%*d " MAX_STRING, hishash) != 1) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Got bad %s from %s (%s)", "CHAL_REPLY", c->name,
|
2002-09-09 21:25:28 +00:00
|
|
|
c->hostname);
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if the length of the hash is all right */
|
|
|
|
|
|
|
|
if(strlen(hishash) != c->outdigest->md_size * 2) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Possible intruder %s (%s): %s", c->name,
|
|
|
|
c->hostname, "wrong challenge reply length");
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Convert the hash to binary format */
|
|
|
|
|
|
|
|
hex2bin(hishash, hishash, c->outdigest->md_size);
|
|
|
|
|
|
|
|
/* Calculate the hash from the challenge we sent */
|
|
|
|
|
2003-10-11 12:16:13 +00:00
|
|
|
if(!EVP_DigestInit(&ctx, c->outdigest)
|
|
|
|
|| !EVP_DigestUpdate(&ctx, c->hischallenge, RSA_size(c->rsa_key))
|
2006-03-19 13:06:21 +00:00
|
|
|
|| !EVP_DigestFinal(&ctx, (unsigned char *)myhash, NULL)) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Error during calculation of response from %s (%s): %s",
|
2003-10-11 12:16:13 +00:00
|
|
|
c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
|
|
|
|
return false;
|
|
|
|
}
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
/* Verify the incoming hash with the calculated hash */
|
|
|
|
|
|
|
|
if(memcmp(hishash, myhash, c->outdigest->md_size)) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Possible intruder %s (%s): %s", c->name,
|
|
|
|
c->hostname, "wrong challenge reply");
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2003-07-12 17:41:48 +00:00
|
|
|
ifdebug(SCARY_THINGS) {
|
2002-09-09 21:25:28 +00:00
|
|
|
bin2hex(myhash, hishash, SHA_DIGEST_LENGTH);
|
|
|
|
hishash[SHA_DIGEST_LENGTH * 2] = '\0';
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_DEBUG, "Expected challenge reply: %s", hishash);
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Identity has now been positively verified.
|
|
|
|
Send an acknowledgement with the rest of the information needed.
|
|
|
|
*/
|
|
|
|
|
|
|
|
c->allow_request = ACK;
|
|
|
|
|
|
|
|
return send_ack(c);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool send_ack(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
/* ACK message contains rest of the information the other end needs
|
|
|
|
to create node_t and edge_t structures. */
|
|
|
|
|
|
|
|
struct timeval now;
|
2003-11-10 22:31:53 +00:00
|
|
|
bool choice;
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
/* Estimate weight */
|
|
|
|
|
|
|
|
gettimeofday(&now, NULL);
|
2003-07-22 20:55:21 +00:00
|
|
|
c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000;
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2003-11-10 22:31:53 +00:00
|
|
|
/* Check some options */
|
|
|
|
|
|
|
|
if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &choice) && choice) || myself->options & OPTION_INDIRECT)
|
|
|
|
c->options |= OPTION_INDIRECT;
|
|
|
|
|
|
|
|
if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &choice) && choice) || myself->options & OPTION_TCPONLY)
|
|
|
|
c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
|
|
|
|
|
2009-03-09 12:48:54 +00:00
|
|
|
if(myself->options & OPTION_PMTU_DISCOVERY)
|
2003-12-20 21:25:17 +00:00
|
|
|
c->options |= OPTION_PMTU_DISCOVERY;
|
2003-12-20 19:47:53 +00:00
|
|
|
|
2003-12-22 11:04:17 +00:00
|
|
|
get_config_int(lookup_config(c->config_tree, "Weight"), &c->estimated_weight);
|
|
|
|
|
2009-10-24 14:15:24 +00:00
|
|
|
return send_request(c, "%d %s %d %x", ACK, myport, c->estimated_weight, c->options);
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
static void send_everything(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
avl_node_t *node, *node2;
|
|
|
|
node_t *n;
|
|
|
|
subnet_t *s;
|
|
|
|
edge_t *e;
|
|
|
|
|
|
|
|
/* Send all known subnets and edges */
|
|
|
|
|
2003-11-17 15:30:18 +00:00
|
|
|
if(tunnelserver) {
|
|
|
|
for(node = myself->subnet_tree->head; node; node = node->next) {
|
|
|
|
s = node->data;
|
|
|
|
send_add_subnet(c, s);
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
for(node = node_tree->head; node; node = node->next) {
|
2003-08-28 21:05:11 +00:00
|
|
|
n = node->data;
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
for(node2 = n->subnet_tree->head; node2; node2 = node2->next) {
|
2003-08-28 21:05:11 +00:00
|
|
|
s = node2->data;
|
2002-09-09 21:25:28 +00:00
|
|
|
send_add_subnet(c, s);
|
|
|
|
}
|
|
|
|
|
|
|
|
for(node2 = n->edge_tree->head; node2; node2 = node2->next) {
|
2003-08-28 21:05:11 +00:00
|
|
|
e = node2->data;
|
2002-09-09 21:25:28 +00:00
|
|
|
send_add_edge(c, e);
|
|
|
|
}
|
|
|
|
}
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|
|
|
|
|
2009-09-24 22:14:03 +00:00
|
|
|
bool ack_h(connection_t *c) {
|
2002-09-09 21:25:28 +00:00
|
|
|
char hisport[MAX_STRING_SIZE];
|
|
|
|
char *hisaddress, *dummy;
|
2003-12-22 11:04:17 +00:00
|
|
|
int weight, mtu;
|
2009-10-24 14:15:24 +00:00
|
|
|
uint32_t options;
|
2002-09-09 21:25:28 +00:00
|
|
|
node_t *n;
|
|
|
|
|
2009-10-24 14:15:24 +00:00
|
|
|
if(sscanf(c->buffer, "%*d " MAX_STRING " %d %x", hisport, &weight, &options) != 3) {
|
2009-09-24 22:54:07 +00:00
|
|
|
logger(LOG_ERR, "Got bad %s from %s (%s)", "ACK", c->name,
|
2002-09-09 21:25:28 +00:00
|
|
|
c->hostname);
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if we already have a node_t for him */
|
|
|
|
|
|
|
|
n = lookup_node(c->name);
|
|
|
|
|
|
|
|
if(!n) {
|
|
|
|
n = new_node();
|
|
|
|
n->name = xstrdup(c->name);
|
|
|
|
node_add(n);
|
|
|
|
} else {
|
|
|
|
if(n->connection) {
|
|
|
|
/* Oh dear, we already have a connection to this node. */
|
2009-09-24 22:54:07 +00:00
|
|
|
ifdebug(CONNECTIONS) logger(LOG_DEBUG, "Established a second connection with %s (%s), closing old connection",
|
2002-09-09 21:25:28 +00:00
|
|
|
n->name, n->hostname);
|
2003-07-22 20:55:21 +00:00
|
|
|
terminate_connection(n->connection, false);
|
2003-01-12 17:02:23 +00:00
|
|
|
/* Run graph algorithm to purge key and make sure up/down scripts are rerun with new IP addresses and stuff */
|
|
|
|
graph();
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
n->connection = c;
|
|
|
|
c->node = n;
|
2009-03-09 12:48:54 +00:00
|
|
|
if(!(c->options & options & OPTION_PMTU_DISCOVERY)) {
|
|
|
|
c->options &= ~OPTION_PMTU_DISCOVERY;
|
|
|
|
options &= ~OPTION_PMTU_DISCOVERY;
|
|
|
|
}
|
2002-09-09 21:25:28 +00:00
|
|
|
c->options |= options;
|
|
|
|
|
2003-12-22 11:04:17 +00:00
|
|
|
if(get_config_int(lookup_config(c->config_tree, "PMTU"), &mtu) && mtu < n->mtu)
|
|
|
|
n->mtu = mtu;
|
|
|
|
|
|
|
|
if(get_config_int(lookup_config(myself->connection->config_tree, "PMTU"), &mtu) && mtu < n->mtu)
|
|
|
|
n->mtu = mtu;
|
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* Activate this connection */
|
|
|
|
|
|
|
|
c->allow_request = ALL;
|
2003-07-22 20:55:21 +00:00
|
|
|
c->status.active = true;
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2009-09-24 22:54:07 +00:00
|
|
|
ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Connection with %s (%s) activated", c->name,
|
2002-09-09 21:25:28 +00:00
|
|
|
c->hostname);
|
|
|
|
|
|
|
|
/* Send him everything we know */
|
|
|
|
|
2003-11-17 15:30:18 +00:00
|
|
|
send_everything(c);
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
/* Create an edge_t for this connection */
|
|
|
|
|
|
|
|
c->edge = new_edge();
|
|
|
|
c->edge->from = myself;
|
|
|
|
c->edge->to = n;
|
|
|
|
sockaddr2str(&c->address, &hisaddress, &dummy);
|
|
|
|
c->edge->address = str2sockaddr(hisaddress, hisport);
|
|
|
|
free(hisaddress);
|
|
|
|
free(dummy);
|
|
|
|
c->edge->weight = (weight + c->estimated_weight) / 2;
|
|
|
|
c->edge->connection = c;
|
|
|
|
c->edge->options = c->options;
|
|
|
|
|
|
|
|
edge_add(c->edge);
|
|
|
|
|
|
|
|
/* Notify everyone of the new edge */
|
|
|
|
|
2003-11-17 15:30:18 +00:00
|
|
|
if(tunnelserver)
|
2003-11-10 22:31:53 +00:00
|
|
|
send_add_edge(c, c->edge);
|
2003-11-17 15:30:18 +00:00
|
|
|
else
|
|
|
|
send_add_edge(broadcast, c->edge);
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
/* Run MST and SSSP algorithms */
|
|
|
|
|
|
|
|
graph();
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
return true;
|
2002-02-11 10:05:58 +00:00
|
|
|
}
|