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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
#ifndef OPENVPN_BUFFER_BUFCOMPOSED_H
#define OPENVPN_BUFFER_BUFCOMPOSED_H
#include <openvpn/common/exception.hpp>
#include <openvpn/buffer/bufcomplete.hpp>
#include <openvpn/buffer/buflist.hpp>
namespace openvpn {
class BufferComposed
{
public:
class Complete : public BufferComplete
{
public:
BufferPtr get()
{
#if 0 // don't include for production
if (iter_defined())
throw Exception("BufferComposed::Complete: residual data");
#endif
BufferPtr ret = bc.bv.join();
bc.bv.clear();
return ret;
}
private:
friend class BufferComposed;
Complete(BufferComposed &bc_arg)
: bc(bc_arg),
iter(bc.bv.cbegin())
{
next_buffer_impl();
}
bool iter_defined()
{
return iter != bc.bv.end();
}
virtual void next_buffer() override
{
next_buffer_impl();
}
// Both ctor and next_buffer delegate here
void next_buffer_impl()
{
if (iter_defined())
reset_buf(**iter++);
else
reset_buf();
}
BufferComposed &bc;
BufferVector::const_iterator iter;
};
size_t size() const
{
return bv.join_size();
}
void put(BufferPtr bp)
{
bv.push_back(std::move(bp));
}
Complete complete()
{
return Complete(*this);
}
private:
BufferVector bv;
};
} // namespace openvpn
#endif
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