123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/*
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Copyright (c) 2013, Steven Siloti
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LIBTORRENT_ITEM_HPP
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#define LIBTORRENT_ITEM_HPP
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#include <libtorrent/sha1_hash.hpp>
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#include <libtorrent/lazy_entry.hpp>
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#include <libtorrent/entry.hpp>
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#include <vector>
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#include <exception>
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namespace libtorrent { namespace dht
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{
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bool TORRENT_EXTRA_EXPORT verify_mutable_item(std::pair<char const*, int> v,
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boost::uint64_t seq,
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char const* pk,
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char const* sig);
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void TORRENT_EXTRA_EXPORT sign_mutable_item(std::pair<char const*, int> v,
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boost::uint64_t seq,
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char const* pk,
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char const* sk,
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char* sig);
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sha1_hash TORRENT_EXTRA_EXPORT mutable_item_cas(std::pair<char const*, int> v, boost::uint64_t seq);
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struct TORRENT_EXTRA_EXPORT invalid_item : std::exception
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{
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virtual const char* what() const throw() { return "invalid DHT item"; }
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};
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enum
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{
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item_pk_len = 32,
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item_sk_len = 64,
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item_sig_len = 64
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};
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struct lazy_item;
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class TORRENT_EXTRA_EXPORT item
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{
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public:
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item() : m_mutable(false) {}
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item(entry const& v) { assign(v); }
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item(entry const& v, boost::uint64_t seq, char const* pk, char const* sk);
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item(lazy_entry const* v) { assign(v); }
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item(lazy_entry const* v, boost::uint64_t seq, char const* pk, char const* sig);
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item(lazy_item const&);
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void assign(entry const& v) { assign(v, 0, NULL, NULL); }
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void assign(entry const& v, boost::uint64_t seq, char const* pk, char const* sk);
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void assign(lazy_entry const* v) { assign(v, 0, NULL, NULL); }
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bool assign(lazy_entry const* v, boost::uint64_t seq, char const* pk, char const* sig);
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void clear() { m_value = entry(); }
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bool empty() const { return m_value.type() == entry::undefined_t; }
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bool is_mutable() const { return m_mutable; }
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sha1_hash cas();
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entry const& value() const { return m_value; }
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char const* pk() { TORRENT_ASSERT(m_mutable); return m_pk; }
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char const* sig() { TORRENT_ASSERT(m_mutable); return m_sig; }
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boost::uint64_t seq() { TORRENT_ASSERT(m_mutable); return m_seq; }
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private:
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entry m_value;
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char m_pk[item_pk_len];
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char m_sig[item_sig_len];
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boost::uint64_t m_seq;
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bool m_mutable;
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};
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struct lazy_item
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{
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lazy_item(lazy_entry const* v) : value(v), pk(NULL), sig(NULL), seq(0) {}
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lazy_item(lazy_entry const* v, char const* pk, char const* sig, boost::uint64_t seq);
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bool is_mutable() const { return pk && sig; }
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lazy_entry const* value;
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char const* pk;
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char const* sig;
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boost::uint64_t const seq;
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};
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} } // namespace libtorrent::dht
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#endif // LIBTORRENT_ITEM_HPP
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