* 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 <stdexcept>
#include "log.h"
#include "anytunError.h"
-EncryptedPacket::EncryptedPacket(u_int32_t payload_length, u_int32_t auth_tag_length, bool allow_realloc)
+EncryptedPacket::EncryptedPacket(uint32_t payload_length, uint32_t auth_tag_length, bool allow_realloc)
: Buffer(payload_length + sizeof(struct HeaderStruct), allow_realloc), auth_tag_length_(auth_tag_length)
{
header_ = reinterpret_cast<struct HeaderStruct*>(buf_);
payload_ = buf_ + sizeof(struct HeaderStruct);
auth_tag_ = NULL;
- if(header_)
- {
+ if(header_) {
header_->seq_nr = 0;
header_->sender_id = 0;
header_->mux = 0;
}
}
-u_int32_t EncryptedPacket::getHeaderLength()
+uint32_t EncryptedPacket::getHeaderLength()
{
return sizeof(struct HeaderStruct);
}
seq_nr_t EncryptedPacket::getSeqNr() const
{
- if(header_)
+ if(header_) {
return SEQ_NR_T_NTOH(header_->seq_nr);
-
+ }
+
return 0;
}
sender_id_t EncryptedPacket::getSenderId() const
{
- if(header_)
+ if(header_) {
return SENDER_ID_T_NTOH(header_->sender_id);
+ }
return 0;
}
mux_t EncryptedPacket::getMux() const
{
- if(header_)
+ if(header_) {
return MUX_T_NTOH(header_->mux);
+ }
return 0;
}
void EncryptedPacket::setSeqNr(seq_nr_t seq_nr)
{
- if(header_)
+ if(header_) {
header_->seq_nr = SEQ_NR_T_HTON(seq_nr);
+ }
}
void EncryptedPacket::setSenderId(sender_id_t sender_id)
{
- if(header_)
+ if(header_) {
header_->sender_id = SENDER_ID_T_HTON(sender_id);
+ }
}
void EncryptedPacket::setMux(mux_t mux)
{
- if(header_)
+ if(header_) {
header_->mux = MUX_T_HTON(mux);
+ }
}
void EncryptedPacket::setHeader(seq_nr_t seq_nr, sender_id_t sender_id, mux_t mux)
{
- if(!header_)
+ if(!header_) {
return;
+ }
header_->seq_nr = SEQ_NR_T_HTON(seq_nr);
header_->sender_id = SENDER_ID_T_HTON(sender_id);
header_->mux = MUX_T_HTON(mux);
}
-u_int32_t EncryptedPacket::getPayloadLength() const
+uint32_t EncryptedPacket::getPayloadLength() const
{
- if(!payload_)
+ if(!payload_) {
return 0;
+ }
- if(!auth_tag_)
+ if(!auth_tag_) {
return (length_ > sizeof(struct HeaderStruct)) ? (length_ - sizeof(struct HeaderStruct)) : 0;
-
+ }
+
return (length_ > (sizeof(struct HeaderStruct) + auth_tag_length_)) ? (length_ - sizeof(struct HeaderStruct) - auth_tag_length_) : 0;
}
-void EncryptedPacket::setPayloadLength(u_int32_t payload_length)
+void EncryptedPacket::setPayloadLength(uint32_t payload_length)
{
Buffer::setLength(payload_length + sizeof(struct HeaderStruct));
- // depending on allow_realloc buf_ may point to another address
- // therefore in this case reinit() gets called by Buffer::setLength()
+ // depending on allow_realloc buf_ may point to another address
+ // therefore in this case reinit() gets called by Buffer::setLength()
}
void EncryptedPacket::reinit()
{
header_ = reinterpret_cast<struct HeaderStruct*>(buf_);
payload_ = buf_ + sizeof(struct HeaderStruct);
-
- if(length_ <= (sizeof(struct HeaderStruct)))
+
+ if(length_ <= (sizeof(struct HeaderStruct))) {
payload_ = NULL;
-
+ }
+
if(length_ < (sizeof(struct HeaderStruct))) {
header_ = NULL;
- AnytunError::throwErr() << "encrypted packet can't be initialized, buffer is too small";
- }
-
- if(auth_tag_)
- {
+ AnytunError::throwErr() << "encrypted packet can't be initialized, buffer is too small";
+ }
+
+ if(auth_tag_) {
if(length_ < (sizeof(struct HeaderStruct) + auth_tag_length_)) {
auth_tag_ = NULL;
- AnytunError::throwErr() << "auth-tag can't be enabled, buffer is too small";
+ AnytunError::throwErr() << "auth-tag can't be enabled, buffer is too small";
}
auth_tag_ = buf_ + length_ - auth_tag_length_;
- }
+ }
}
-u_int8_t* EncryptedPacket::getPayload()
+uint8_t* EncryptedPacket::getPayload()
{
return payload_;
}
-u_int8_t* EncryptedPacket::getAuthenticatedPortion()
+uint8_t* EncryptedPacket::getAuthenticatedPortion()
{
return buf_;
}
-u_int32_t EncryptedPacket::getAuthenticatedPortionLength()
+uint32_t EncryptedPacket::getAuthenticatedPortionLength()
{
- if(!buf_)
+ if(!buf_) {
return 0;
+ }
- if(!auth_tag_)
+ if(!auth_tag_) {
return length_;
-
+ }
+
return (length_ > auth_tag_length_) ? (length_ - auth_tag_length_) : 0;
}
void EncryptedPacket::withAuthTag(bool b)
{
- if((b && auth_tag_) || (!b && !auth_tag_))
+ if((b && auth_tag_) || (!b && !auth_tag_)) {
return;
-
- if(b)
- {
- if(length_ < (sizeof(struct HeaderStruct) + auth_tag_length_))
+ }
+
+ if(b) {
+ if(length_ < (sizeof(struct HeaderStruct) + auth_tag_length_)) {
AnytunError::throwErr() << "auth-tag can't be enabled, buffer is too small";
-
+ }
+
auth_tag_ = buf_ + length_ - auth_tag_length_;
- }
- else
+ } else {
auth_tag_ = NULL;
+ }
}
void EncryptedPacket::addAuthTag()
{
- if(auth_tag_)
+ if(auth_tag_) {
return;
+ }
auth_tag_ = buf_; // will be set to the correct value @ reinit
setLength(length_ + auth_tag_length_);
- if(auth_tag_ == buf_) // reinit was not called by setLength
+ if(auth_tag_ == buf_) { // reinit was not called by setLength
reinit();
+ }
}
void EncryptedPacket::removeAuthTag()
{
- if(!auth_tag_)
+ if(!auth_tag_) {
return;
+ }
auth_tag_ = NULL;
setLength(length_ - auth_tag_length_);
}
-u_int8_t* EncryptedPacket::getAuthTag()
+uint8_t* EncryptedPacket::getAuthTag()
{
return auth_tag_;
}
-u_int32_t EncryptedPacket::getAuthTagLength()
+uint32_t EncryptedPacket::getAuthTagLength()
{
- if(auth_tag_)
+ if(auth_tag_) {
return auth_tag_length_;
+ }
return 0;
}
projects / anytun.git / blobdiff