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-rw-r--r--buffer.cpp111
1 files changed, 111 insertions, 0 deletions
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+/*
+ * anytun
+ *
+ * The secure anycast tunneling protocol (satp) defines a protocol used
+ * for communication between any combination of unicast and anycast
+ * 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
+ * intended to deliver a generic, scaleable and secure solution for
+ * tunneling and relaying of packets of any protocol.
+ *
+ *
+ * Copyright (C) 2007 anytun.org <satp@wirdorange.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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 (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <string>
+
+#include "datatypes.h"
+
+#include "buffer.h"
+
+Buffer::Buffer() : buf_(0), length_(0)
+{
+}
+
+Buffer::Buffer(u_int8_t* data, u_int32_t length) : length_(length)
+{
+ buf_ = new u_int8_t[length_];
+ if(buf_)
+ std::memcpy(buf_, data, length_);
+ else
+ length_ = 0;
+}
+
+Buffer::~Buffer()
+{
+ if(buf_)
+ delete[] buf_;
+}
+
+Buffer::Buffer(const Buffer &src) : length_(src.length_)
+{
+ buf_ = new u_int8_t[length_];
+ if(buf_)
+ std::memcpy(buf_, src.buf_, length_);
+ else
+ length_ = 0;
+}
+
+void Buffer::operator=(const Buffer &src)
+{
+ if(buf_)
+ delete[] buf_;
+
+ length_ = src.length_;
+
+ buf_ = new u_int8_t[length_];
+ if(buf_)
+ std::memcpy(buf_, src.buf_, length_);
+ else
+ length_ = 0;
+}
+
+u_int32_t Buffer::resize(u_int32_t new_length)
+{
+ if(length_ == new_length)
+ return length_;
+
+ u_int8_t *tmp = new u_int8_t[new_length];
+ if(!tmp)
+ return length_;
+
+ if(buf_)
+ {
+ std::memcpy(tmp, buf_, length_);
+ delete[] buf_;
+ }
+
+ length_ = new_length;
+ buf_ = tmp;
+}
+
+u_int32_t Buffer::getLength() const
+{
+ return length_;
+}
+
+u_int8_t* Buffer::getBuf()
+{
+ return buf_;
+}
+
+Buffer::operator u_int8_t*( )
+{
+ return buf_;
+}