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4bd1d1ca2f
Bound the number of manifests carried in a single TMManifests message (kMaxManifestsPerMessage). Trusted manifests are always included and processed; untrusted gossip is capped per message on both send and receive, and the sender is charged only when untrusted entries are actually skipped. Oversized TMManifests messages are dropped without penalty at the protocol layer so an unpatched peer is not disconnected. Complements the cache bound from #276/#323.
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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/*
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Portions from http://www.adp-gmbh.ch/cpp/common/base64.html
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Copyright notice:
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base64.cpp and base64.h
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Copyright (C) 2004-2008 René Nyffenegger
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This source code is provided 'as-is', without any express or implied
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warranty. In no event will the author be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this source code must not be misrepresented; you must not
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claim that you wrote the original source code. If you use this source code
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original source code.
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3. This notice may not be removed or altered from any source distribution.
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René Nyffenegger rene.nyffenegger@adp-gmbh.ch
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*/
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#pragma once
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#include <cstdint>
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#include <string>
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namespace xrpl {
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namespace base64 {
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/**
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* Returns the maximum number of characters needed to base64-encode @p nBytes bytes.
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*
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* @param nBytes Number of input bytes.
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* @return Size of the encoded string, including padding.
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*/
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constexpr std::size_t
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encodedSize(std::size_t const nBytes)
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{
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return 4 * ((nBytes + 2) / 3);
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}
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/**
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* Returns the maximum number of bytes a base64 string of @p numChars characters
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* decodes to.
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*
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* @param numChars Number of base64 characters.
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* @return Upper bound on the number of decoded bytes.
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*/
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constexpr std::size_t
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decodedSize(std::size_t const numChars)
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{
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return ((numChars / 4) * 3) + 2;
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}
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} // namespace base64
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std::string
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base64Encode(std::uint8_t const* data, std::size_t len);
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inline std::string
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base64Encode(std::string const& s)
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{
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return base64Encode(reinterpret_cast<std::uint8_t const*>(s.data()), s.size());
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}
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std::string
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base64Decode(std::string_view data);
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} // namespace xrpl
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