* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
- * message authentication based on the methodes used by SRTP. It is
+ * message authentication based on the methods used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
- * Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
+ * Copyright (C) 2007-2014 Markus Grüneis, Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3 as
- * published by the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
*
* Anytun is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with anytun. If not, see <http://www.gnu.org/licenses/>.
+ * along with Anytun. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL. If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so. If you
+ * do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source
+ * files in the program, then also delete it here.
*/
#include "threadUtils.hpp"
#include "datatypes.h"
-
+#include <cstring>
#include "seqWindow.h"
SeqWindowElement::SeqWindowElement()
SeqWindowElement::~SeqWindowElement()
{
- if(window_)
+ if(window_) {
delete[] window_;
+ }
}
void SeqWindowElement::init(window_size_t w, seq_nr_t m)
{
- if(window_)
+ if(window_) {
delete[] window_;
- window_ = new u_int8_t[w];
- memset(window_, 0, w);
+ }
+ window_ = new uint8_t[w];
+ memset(window_, 0, w);
pos_ = 0;
max_ = m;
window_[pos_] = 1;
bool SeqWindow::checkAndAdd(sender_id_t sender, seq_nr_t seq_nr)
{
Lock lock(mutex_);
- if (!window_size_)
+ if(!window_size_) {
return false;
+ }
SenderMap::iterator s = sender_.find(sender);
if(s == sender_.end()) {
s->second.max_ += SEQ_NR_MAX/2;
seq_nr += SEQ_NR_MAX/2;
shifted = 1;
- }
- else if(s->second.max_ > (SEQ_NR_MAX - window_size_)) {
+ } else if(s->second.max_ > (SEQ_NR_MAX - window_size_)) {
s->second.max_ -= SEQ_NR_MAX/2;
seq_nr -= SEQ_NR_MAX/2;
shifted = 2;
}
-
+
seq_nr_t min = s->second.max_ - window_size_ + 1;
if(seq_nr < min || seq_nr == s->second.max_) {
- if(shifted == 1)
+ if(shifted == 1) {
s->second.max_ -= SEQ_NR_MAX/2;
- else if(shifted == 2)
+ } else if(shifted == 2) {
s->second.max_ += SEQ_NR_MAX/2;
+ }
return true;
}
-
+
if(seq_nr > s->second.max_) {
seq_nr_t diff = seq_nr - s->second.max_;
- if(diff >= window_size_)
+ if(diff >= window_size_) {
diff = window_size_;
-
+ }
+
window_size_t new_pos = s->second.pos_ + diff;
-
+
if(new_pos >= window_size_) {
new_pos -= window_size_;
-
- if(s->second.pos_ < window_size_ - 1)
+
+ if(s->second.pos_ < window_size_ - 1) {
memset(&(s->second.window_[s->second.pos_ + 1]), 0, window_size_ - s->second.pos_ - 1);
-
+ }
+
memset(s->second.window_, 0, new_pos);
- }
- else {
+ } else {
memset(&(s->second.window_[s->second.pos_ + 1]), 0, diff);
}
s->second.pos_ = new_pos;
s->second.window_[s->second.pos_] = 1;
s->second.max_ = seq_nr;
-
- if(shifted == 1)
+
+ if(shifted == 1) {
s->second.max_ -= SEQ_NR_MAX/2;
- else if(shifted == 2)
+ } else if(shifted == 2) {
s->second.max_ += SEQ_NR_MAX/2;
-
+ }
+
return false;
}
-
+
seq_nr_t diff = s->second.max_ - seq_nr;
- window_size_t pos = diff > s->second.pos_ ? s->second.pos_ + window_size_ : s->second.pos_;
+ window_size_t pos = diff > s->second.pos_ ? s->second.pos_ + window_size_ : s->second.pos_;
pos -= diff;
-
- if(shifted == 1)
+
+ if(shifted == 1) {
s->second.max_ -= SEQ_NR_MAX/2;
- else if(shifted == 2)
+ } else if(shifted == 2) {
s->second.max_ += SEQ_NR_MAX/2;
-
+ }
+
int ret = s->second.window_[pos];
s->second.window_[pos] = 1;
-
- if(ret)
+
+ if(ret) {
return true;
-
+ }
+
return false;
}
projects / anytun.git / blobdiff