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Add ref-counted buffer byte_slice. Currently used for sending TCP data.

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This commit is contained in:
Lee Clagett 2019-05-11 11:38:35 -04:00
parent cdfa2e58df
commit bdfc63ae4d
13 changed files with 882 additions and 153 deletions
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145
contrib/epee/include/byte_slice.h Normal file
View file

@ -0,0 +1,145 @@
// Copyright (c) 2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
#include "span.h"
namespace epee
{
struct byte_slice_data;
struct release_byte_slice
{
void operator()(byte_slice_data*) const noexcept;
};
/*! Inspired by slices in golang. Storage is thread-safe reference counted,
allowing for cheap copies or range selection on the bytes. The bytes
owned by this class are always immutable.
The functions `operator=`, `take_slice` and `remove_prefix` may alter the
reference count for the backing store, which will invalidate pointers
previously returned if the reference count is zero. Be careful about
"caching" pointers in these circumstances. */
class byte_slice
{
/* A custom reference count is used instead of shared_ptr because it allows
for an allocation optimization for the span constructor. This also
reduces the size of this class by one pointer. */
std::unique_ptr<byte_slice_data, release_byte_slice> storage_;
span<const std::uint8_t> portion_; // within storage_
//! Internal use only; use to increase `storage` reference count.
byte_slice(byte_slice_data* storage, span<const std::uint8_t> portion) noexcept;
struct adapt_buffer{};
template<typename T>
explicit byte_slice(const adapt_buffer, T&& buffer);
public:
using value_type = std::uint8_t;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
using pointer = const std::uint8_t*;
using const_pointer = const std::uint8_t*;
using reference = std::uint8_t;
using const_reference = std::uint8_t;
using iterator = pointer;
using const_iterator = const_pointer;
//! Construct empty slice.
byte_slice() noexcept
: storage_(nullptr), portion_()
{}
//! Construct empty slice
byte_slice(std::nullptr_t) noexcept
: byte_slice()
{}
//! Scatter-gather (copy) multiple `sources` into a single allocated slice.
explicit byte_slice(std::initializer_list<span<const std::uint8_t>> sources);
//! Convert `buffer` into a slice using one allocation for shared count.
explicit byte_slice(std::vector<std::uint8_t>&& buffer);
//! Convert `buffer` into a slice using one allocation for shared count.
explicit byte_slice(std::string&& buffer);
byte_slice(byte_slice&& source) noexcept;
~byte_slice() noexcept = default;
//! \note May invalidate previously retrieved pointers.
byte_slice& operator=(byte_slice&&) noexcept;
//! \return A shallow (cheap) copy of the data from `this` slice.
byte_slice clone() const noexcept { return {storage_.get(), portion_}; }
iterator begin() const noexcept { return portion_.begin(); }
const_iterator cbegin() const noexcept { return portion_.begin(); }
iterator end() const noexcept { return portion_.end(); }
const_iterator cend() const noexcept { return portion_.end(); }
bool empty() const noexcept { return storage_ == nullptr; }
const std::uint8_t* data() const noexcept { return portion_.data(); }
std::size_t size() const noexcept { return portion_.size(); }
/*! Drop bytes from the beginning of `this` slice.
\note May invalidate previously retrieved pointers.
\post `this->size() = this->size() - std::min(this->size(), max_bytes)`
\post `if (this->size() <= max_bytes) this->data() = nullptr`
\return Number of bytes removed. */
std::size_t remove_prefix(std::size_t max_bytes) noexcept;
/*! "Take" bytes from the beginning of `this` slice.
\note May invalidate previously retrieved pointers.
\post `this->size() = this->size() - std::min(this->size(), max_bytes)`
\post `if (this->size() <= max_bytes) this->data() = nullptr`
\return Slice containing the bytes removed from `this` slice. */
byte_slice take_slice(std::size_t max_bytes) noexcept;
/*! Return a shallow (cheap) copy of a slice from `begin` and `end` offsets.
\throw std::out_of_range If `end < begin`.
\throw std::out_of_range If `size() < end`.
\return Slice starting at `data() + begin` of size `end - begin`. */
byte_slice get_slice(std::size_t begin, std::size_t end) const;
};
} // epee

6
contrib/epee/include/net/abstract_tcp_server2.h
View file

@ -53,6 +53,7 @@
#include <boost/enable_shared_from_this.hpp>
#include <boost/interprocess/detail/atomic.hpp>
#include <boost/thread/thread.hpp>
#include "byte_slice.h"
#include "net_utils_base.h"
#include "syncobj.h"
#include "connection_basic.hpp"
@ -135,8 +136,7 @@ namespace net_utils
private:
//----------------- i_service_endpoint ---------------------
virtual bool do_send(const void* ptr, size_t cb); ///< (see do_send from i_service_endpoint)
virtual bool do_send_chunk(const void* ptr, size_t cb); ///< will send (or queue) a part of data
virtual bool do_send(byte_slice message); ///< (see do_send from i_service_endpoint)
virtual bool send_done();
virtual bool close();
virtual bool call_run_once_service_io();
@ -145,6 +145,8 @@ namespace net_utils
virtual bool add_ref();
virtual bool release();
//------------------------------------------------------
bool do_send_chunk(byte_slice chunk); ///< will send (or queue) a part of data. internal use only
boost::shared_ptr<connection<t_protocol_handler> > safe_shared_from_this();
bool shutdown();
/// Handle completion of a receive operation.

59
contrib/epee/include/net/abstract_tcp_server2.inl
View file

@ -520,7 +520,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::do_send(const void* ptr, size_t cb) {
bool connection<t_protocol_handler>::do_send(byte_slice message) {
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
@ -529,6 +529,9 @@ PRAGMA_WARNING_DISABLE_VS(4355)
if (m_was_shutdown) return false;
// TODO avoid copy
std::uint8_t const* const message_data = message.data();
const std::size_t message_size = message.size();
const double factor = 32; // TODO config
typedef long long signed int t_safe; // my t_size to avoid any overunderflow in arithmetic
const t_safe chunksize_good = (t_safe)( 1024 * std::max(1.0,factor) );
@ -538,13 +541,11 @@ PRAGMA_WARNING_DISABLE_VS(4355)
CHECK_AND_ASSERT_MES(! (chunksize_max<0), false, "Negative chunksize_max" ); // make sure it is unsigned before removin sign with cast:
long long unsigned int chunksize_max_unsigned = static_cast<long long unsigned int>( chunksize_max ) ;
if (allow_split && (cb > chunksize_max_unsigned)) {
if (allow_split && (message_size > chunksize_max_unsigned)) {
{ // LOCK: chunking
epee::critical_region_t<decltype(m_chunking_lock)> send_guard(m_chunking_lock); // *** critical ***
MDEBUG("do_send() will SPLIT into small chunks, from packet="<<cb<<" B for ptr="<<ptr);
t_safe all = cb; // all bytes to send
t_safe pos = 0; // current sending position
MDEBUG("do_send() will SPLIT into small chunks, from packet="<<message_size<<" B for ptr="<<message_data);
// 01234567890
// ^^^^ (pos=0, len=4) ; pos:=pos+len, pos=4
// ^^^^ (pos=4, len=4) ; pos:=pos+len, pos=8
@ -554,40 +555,25 @@ PRAGMA_WARNING_DISABLE_VS(4355)
// char* buf = new char[ bufsize ];
bool all_ok = true;
while (pos < all) {
t_safe lenall = all-pos; // length from here to end
t_safe len = std::min( chunksize_good , lenall); // take a smaller part
CHECK_AND_ASSERT_MES(len<=chunksize_good, false, "len too large");
// pos=8; len=4; all=10; len=3;
while (!message.empty()) {
byte_slice chunk = message.take_slice(chunksize_good);
CHECK_AND_ASSERT_MES(! (len<0), false, "negative len"); // check before we cast away sign:
unsigned long long int len_unsigned = static_cast<long long int>( len );
CHECK_AND_ASSERT_MES(len>0, false, "len not strictly positive"); // (redundant)
CHECK_AND_ASSERT_MES(len_unsigned < std::numeric_limits<size_t>::max(), false, "Invalid len_unsigned"); // yeap we want strong < then max size, to be sure
void *chunk_start = ((char*)ptr) + pos;
MDEBUG("chunk_start="<<chunk_start<<" ptr="<<ptr<<" pos="<<pos);
CHECK_AND_ASSERT_MES(chunk_start >= ptr, false, "Pointer wraparound"); // not wrapped around address?
//std::memcpy( (void*)buf, chunk_start, len);
MDEBUG("chunk_start="<<chunk.data()<<" ptr="<<message_data<<" pos="<<(chunk.data() - message_data));
MDEBUG("part of " << message.size() << ": pos="<<(chunk.data() - message_data) << " len="<<chunk.size());
MDEBUG("part of " << lenall << ": pos="<<pos << " len="<<len);
bool ok = do_send_chunk(chunk_start, len); // <====== ***
bool ok = do_send_chunk(std::move(chunk)); // <====== ***
all_ok = all_ok && ok;
if (!all_ok) {
MDEBUG("do_send() DONE ***FAILED*** from packet="<<cb<<" B for ptr="<<ptr);
MDEBUG("do_send() DONE ***FAILED*** from packet="<<message_size<<" B for ptr="<<message_data);
MDEBUG("do_send() SEND was aborted in middle of big package - this is mostly harmless "
<< " (e.g. peer closed connection) but if it causes trouble tell us at #monero-dev. " << cb);
<< " (e.g. peer closed connection) but if it causes trouble tell us at #monero-dev. " << message_size);
return false; // partial failure in sending
}
pos = pos+len;
CHECK_AND_ASSERT_MES(pos >0, false, "pos <= 0");
// (in catch block, or uniq pointer) delete buf;
} // each chunk
MDEBUG("do_send() DONE SPLIT from packet="<<cb<<" B for ptr="<<ptr);
MDEBUG("do_send() DONE SPLIT from packet="<<message_size<<" B for ptr="<<message_data);
MDEBUG("do_send() m_connection_type = " << m_connection_type);
@ -595,7 +581,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
} // LOCK: chunking
} // a big block (to be chunked) - all chunks
else { // small block
return do_send_chunk(ptr,cb); // just send as 1 big chunk
return do_send_chunk(std::move(message)); // just send as 1 big chunk
}
CATCH_ENTRY_L0("connection<t_protocol_handler>::do_send", false);
@ -603,7 +589,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::do_send_chunk(const void* ptr, size_t cb)
bool connection<t_protocol_handler>::do_send_chunk(byte_slice chunk)
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
@ -623,7 +609,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
//_info("[sock " << socket().native_handle() << "] SEND " << cb);
context.m_last_send = time(NULL);
context.m_send_cnt += cb;
context.m_send_cnt += chunk.size();
//some data should be wrote to stream
//request complete
@ -644,7 +630,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
}*/
long int ms = 250 + (rand()%50);
MDEBUG("Sleeping because QUEUE is FULL, in " << __FUNCTION__ << " for " << ms << " ms before packet_size="<<cb); // XXX debug sleep
MDEBUG("Sleeping because QUEUE is FULL, in " << __FUNCTION__ << " for " << ms << " ms before packet_size="<<chunk.size()); // XXX debug sleep
m_send_que_lock.unlock();
boost::this_thread::sleep(boost::posix_time::milliseconds( ms ) );
m_send_que_lock.lock();
@ -657,12 +643,11 @@ PRAGMA_WARNING_DISABLE_VS(4355)
}
}
m_send_que.resize(m_send_que.size()+1);
m_send_que.back().assign((const char*)ptr, cb);
m_send_que.push_back(std::move(chunk));
if(m_send_que.size() > 1)
{ // active operation should be in progress, nothing to do, just wait last operation callback
auto size_now = cb;
auto size_now = m_send_que.back().size();
MDEBUG("do_send_chunk() NOW just queues: packet="<<size_now<<" B, is added to queue-size="<<m_send_que.size());
//do_send_handler_delayed( ptr , size_now ); // (((H))) // empty function
@ -680,7 +665,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
auto size_now = m_send_que.front().size();
MDEBUG("do_send_chunk() NOW SENSD: packet="<<size_now<<" B");
if (speed_limit_is_enabled())
do_send_handler_write( ptr , size_now ); // (((H)))
do_send_handler_write( chunk.data(), chunk.size() ); // (((H)))
CHECK_AND_ASSERT_MES( size_now == m_send_que.front().size(), false, "Unexpected queue size");
reset_timer(get_default_timeout(), false);

3
contrib/epee/include/net/connection_basic.hpp
View file

@ -49,6 +49,7 @@
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
#include "byte_slice.h"
#include "net/net_utils_base.h"
#include "net/net_ssl.h"
#include "syncobj.h"
@ -108,7 +109,7 @@ class connection_basic { // not-templated base class for rapid developmet of som
volatile uint32_t m_want_close_connection;
std::atomic<bool> m_was_shutdown;
critical_section m_send_que_lock;
std::list<std::string> m_send_que;
std::deque<byte_slice> m_send_que;
volatile bool m_is_multithreaded;
/// Strand to ensure the connection's handlers are not called concurrently.
boost::asio::io_service::strand strand_;

9
contrib/epee/include/net/http_protocol_handler.inl
View file

@ -591,11 +591,12 @@ namespace net_utils
std::string response_data = get_response_header(response);
//LOG_PRINT_L0("HTTP_SEND: << \r\n" << response_data + response.m_body);
LOG_PRINT_L3("HTTP_RESPONSE_HEAD: << \r\n" << response_data);
m_psnd_hndlr->do_send((void*)response_data.data(), response_data.size());
LOG_PRINT_L3("HTTP_RESPONSE_HEAD: << \r\n" << response_data);
if ((response.m_body.size() && (query_info.m_http_method != http::http_method_head)) || (query_info.m_http_method == http::http_method_options))
m_psnd_hndlr->do_send((void*)response.m_body.data(), response.m_body.size());
response_data += response.m_body;
m_psnd_hndlr->do_send(byte_slice{std::move(response_data)});
m_psnd_hndlr->send_done();
return res;
}

5
contrib/epee/include/net/levin_protocol_handler.h
View file

@ -157,10 +157,9 @@ namespace levin
m_current_head.m_return_code = m_config.m_pcommands_handler->invoke(m_current_head.m_command, buff_to_invoke, return_buff, m_conn_context);
m_current_head.m_cb = return_buff.size();
m_current_head.m_have_to_return_data = false;
std::string send_buff((const char*)&m_current_head, sizeof(m_current_head));
send_buff += return_buff;
if(!m_psnd_hndlr->do_send(send_buff.data(), send_buff.size()))
return_buff.insert(0, (const char*)&m_current_head, sizeof(m_current_head));
if(!m_psnd_hndlr->do_send(byte_slice{std::move(return_buff)}))
return false;
}

147
contrib/epee/include/net/levin_protocol_handler_async.h
View file

@ -136,7 +136,6 @@ public:
critical_section m_local_inv_buff_lock;
std::string m_local_inv_buff;
critical_section m_send_lock;
critical_section m_call_lock;
volatile uint32_t m_wait_count;
@ -260,6 +259,34 @@ public:
return handler->is_timer_started();
}
template<class callback_t> friend struct anvoke_handler;
static bucket_head2 make_header(uint32_t command, uint64_t msg_size, uint32_t flags, bool expect_response) noexcept
{
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_have_to_return_data = expect_response;
head.m_cb = SWAP64LE(msg_size);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
head.m_flags = SWAP32LE(flags);
return head;
}
bool send_message(uint32_t command, epee::span<const uint8_t> in_buff, uint32_t flags, bool expect_response)
{
const bucket_head2 head = make_header(command, in_buff.size(), flags, expect_response);
if(!m_pservice_endpoint->do_send(byte_slice{as_byte_span(head), in_buff}))
return false;
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", flags" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<<", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
return true;
}
public:
async_protocol_handler(net_utils::i_service_endpoint* psnd_hndlr,
config_type& config,
@ -458,37 +485,22 @@ public:
if(m_current_head.m_have_to_return_data)
{
std::string return_buff;
m_current_head.m_return_code = m_config.m_pcommands_handler->invoke(
m_current_head.m_command,
buff_to_invoke,
return_buff,
m_connection_context);
m_current_head.m_cb = return_buff.size();
m_current_head.m_have_to_return_data = false;
m_current_head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
m_current_head.m_flags = LEVIN_PACKET_RESPONSE;
#if BYTE_ORDER == LITTLE_ENDIAN
std::string send_buff((const char*)&m_current_head, sizeof(m_current_head));
#else
bucket_head2 head = m_current_head;
head.m_signature = SWAP64LE(head.m_signature);
head.m_cb = SWAP64LE(head.m_cb);
head.m_command = SWAP32LE(head.m_command);
head.m_return_code = SWAP32LE(head.m_return_code);
head.m_flags = SWAP32LE(head.m_flags);
head.m_protocol_version = SWAP32LE(head.m_protocol_version);
std::string send_buff((const char*)&head, sizeof(head));
#endif
send_buff += return_buff;
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(send_buff.data(), send_buff.size()))
const uint32_t return_code = m_config.m_pcommands_handler->invoke(
m_current_head.m_command, buff_to_invoke, return_buff, m_connection_context
);
bucket_head2 head = make_header(m_current_head.m_command, return_buff.size(), LEVIN_PACKET_RESPONSE, false);
head.m_return_code = SWAP32LE(return_code);
return_buff.insert(0, reinterpret_cast<const char*>(&head), sizeof(head));
if(!m_pservice_endpoint->do_send(byte_slice{std::move(return_buff)}))
return false;
CRITICAL_REGION_END();
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << m_current_head.m_cb
<< ", flags" << m_current_head.m_flags
<< ", r?=" << m_current_head.m_have_to_return_data
<<", cmd = " << m_current_head.m_command
<< ", ver=" << m_current_head.m_protocol_version);
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", flags" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<<", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
}
else
m_config.m_pcommands_handler->notify(m_current_head.m_command, buff_to_invoke, m_connection_context);
@ -584,26 +596,10 @@ public:
break;
}
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_cb = SWAP64LE(in_buff.size());
head.m_have_to_return_data = true;
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
CRITICAL_REGION_BEGIN(m_send_lock);
CRITICAL_REGION_LOCAL1(m_invoke_response_handlers_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
err_code = LEVIN_ERROR_CONNECTION;
break;
}
CRITICAL_REGION_BEGIN(m_invoke_response_handlers_lock);
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
if(!send_message(command, in_buff, LEVIN_PACKET_REQUEST, true))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
err_code = LEVIN_ERROR_CONNECTION;
@ -642,36 +638,14 @@ public:
if(m_deletion_initiated)
return LEVIN_ERROR_CONNECTION_DESTROYED;
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_cb = SWAP64LE(in_buff.size());
head.m_have_to_return_data = true;
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
if (!send_message(command, in_buff, LEVIN_PACKET_REQUEST, true))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
LOG_ERROR_CC(m_connection_context, "Failed to send request");
return LEVIN_ERROR_CONNECTION;
}
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
return LEVIN_ERROR_CONNECTION;
}
CRITICAL_REGION_END();
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", f=" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<< ", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
uint64_t ticks_start = misc_utils::get_tick_count();
size_t prev_size = 0;
@ -716,33 +690,12 @@ public:
if(m_deletion_initiated)
return LEVIN_ERROR_CONNECTION_DESTROYED;
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_have_to_return_data = false;
head.m_cb = SWAP64LE(in_buff.size());
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
if (!send_message(command, in_buff, LEVIN_PACKET_REQUEST, false))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send()");
LOG_ERROR_CC(m_connection_context, "Failed to send notify message");
return -1;
}
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send()");
return -1;
}
CRITICAL_REGION_END();
LOG_DEBUG_CC(m_connection_context, "LEVIN_PACKET_SENT. [len=" << head.m_cb <<
", f=" << head.m_flags <<
", r?=" << head.m_have_to_return_data <<
", cmd = " << head.m_command <<
", ver=" << head.m_protocol_version);
return 1;
}
//------------------------------------------------------------------------------------------

5
contrib/epee/include/net/net_utils_base.h
View file

@ -34,9 +34,10 @@
#include <boost/asio/ip/address_v6.hpp>
#include <typeinfo>
#include <type_traits>
#include "byte_slice.h"
#include "enums.h"
#include "serialization/keyvalue_serialization.h"
#include "misc_log_ex.h"
#include "serialization/keyvalue_serialization.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
@ -424,7 +425,7 @@ namespace net_utils
/************************************************************************/
struct i_service_endpoint
{
virtual bool do_send(const void* ptr, size_t cb)=0;
virtual bool do_send(byte_slice message)=0;
virtual bool close()=0;
virtual bool send_done()=0;
virtual bool call_run_once_service_io()=0;

4
contrib/epee/src/CMakeLists.txt
View file

@ -26,8 +26,8 @@
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
add_library(epee STATIC hex.cpp http_auth.cpp mlog.cpp net_helper.cpp net_utils_base.cpp string_tools.cpp wipeable_string.cpp memwipe.c
connection_basic.cpp network_throttle.cpp network_throttle-detail.cpp mlocker.cpp buffer.cpp net_ssl.cpp)
add_library(epee STATIC byte_slice.cpp hex.cpp http_auth.cpp mlog.cpp net_helper.cpp net_utils_base.cpp string_tools.cpp wipeable_string.cpp
memwipe.c connection_basic.cpp network_throttle.cpp network_throttle-detail.cpp mlocker.cpp buffer.cpp net_ssl.cpp)
if (USE_READLINE AND GNU_READLINE_FOUND)
add_library(epee_readline STATIC readline_buffer.cpp)

209
contrib/epee/src/byte_slice.cpp Normal file
View file

@ -0,0 +1,209 @@
// Copyright (c) 2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <atomic>
#include <cstdlib>
#include <cstring>
#include <limits>
#include <stdexcept>
#include <utility>
#include "byte_slice.h"
namespace epee
{
struct byte_slice_data
{
byte_slice_data() noexcept
: ref_count(1)
{}
virtual ~byte_slice_data() noexcept
{}
std::atomic<std::size_t> ref_count;
};
void release_byte_slice::operator()(byte_slice_data* ptr) const noexcept
{
if (ptr && --(ptr->ref_count) == 0)
{
ptr->~byte_slice_data();
free(ptr);
}
}
namespace
{
template<typename T>
struct adapted_byte_slice final : byte_slice_data
{
explicit adapted_byte_slice(T&& buffer)
: byte_slice_data(), buffer(std::move(buffer))
{}
virtual ~adapted_byte_slice() noexcept final override
{}
const T buffer;
};
// bytes "follow" this structure in memory slab
struct raw_byte_slice final : byte_slice_data
{
raw_byte_slice() noexcept
: byte_slice_data()
{}
virtual ~raw_byte_slice() noexcept final override
{}
};
/* This technique is not-standard, but allows for the reference count and
memory for the bytes (when given a list of spans) to be allocated in a
single call. In that situation, the dynamic sized bytes are after/behind
the raw_byte_slice class. The C runtime has to track the number of bytes
allocated regardless, so free'ing is relatively easy. */
template<typename T, typename... U>
std::unique_ptr<T, release_byte_slice> allocate_slice(std::size_t extra_bytes, U&&... args)
{
if (std::numeric_limits<std::size_t>::max() - sizeof(T) < extra_bytes)
throw std::bad_alloc{};
void* const ptr = malloc(sizeof(T) + extra_bytes);
if (ptr == nullptr)
throw std::bad_alloc{};
try
{
new (ptr) T{std::forward<U>(args)...};
}
catch (...)
{
free(ptr);
throw;
}
return std::unique_ptr<T, release_byte_slice>{reinterpret_cast<T*>(ptr)};
}
} // anonymous
byte_slice::byte_slice(byte_slice_data* storage, span<const std::uint8_t> portion) noexcept
: storage_(storage), portion_(portion)
{
if (storage_)
++(storage_->ref_count);
}
template<typename T>
byte_slice::byte_slice(const adapt_buffer, T&& buffer)
: storage_(nullptr), portion_(to_byte_span(to_span(buffer)))
{
if (!buffer.empty())
storage_ = allocate_slice<adapted_byte_slice<T>>(0, std::move(buffer));
}
byte_slice::byte_slice(std::initializer_list<span<const std::uint8_t>> sources)
: byte_slice()
{
std::size_t space_needed = 0;
for (const auto source : sources)
space_needed += source.size();
if (space_needed)
{
auto storage = allocate_slice<raw_byte_slice>(space_needed);
span<std::uint8_t> out{reinterpret_cast<std::uint8_t*>(storage.get() + 1), space_needed};
portion_ = {out.data(), out.size()};
for (const auto source : sources)
{
std::memcpy(out.data(), source.data(), source.size());
if (out.remove_prefix(source.size()) < source.size())
throw std::bad_alloc{}; // size_t overflow on space_needed
}
storage_ = std::move(storage);
}
}
byte_slice::byte_slice(std::string&& buffer)
: byte_slice(adapt_buffer{}, std::move(buffer))
{}
byte_slice::byte_slice(std::vector<std::uint8_t>&& buffer)
: byte_slice(adapt_buffer{}, std::move(buffer))
{}
byte_slice::byte_slice(byte_slice&& source) noexcept
: storage_(std::move(source.storage_)), portion_(source.portion_)
{
source.portion_ = epee::span<const std::uint8_t>{};
}
byte_slice& byte_slice::operator=(byte_slice&& source) noexcept
{
storage_ = std::move(source.storage_);
portion_ = source.portion_;
if (source.storage_ == nullptr)
source.portion_ = epee::span<const std::uint8_t>{};
return *this;
}
std::size_t byte_slice::remove_prefix(std::size_t max_bytes) noexcept
{
max_bytes = portion_.remove_prefix(max_bytes);
if (portion_.empty())
storage_ = nullptr;
return max_bytes;
}
byte_slice byte_slice::take_slice(const std::size_t max_bytes) noexcept
{
byte_slice out{};
std::uint8_t const* const ptr = data();
out.portion_ = {ptr, portion_.remove_prefix(max_bytes)};
if (portion_.empty())
out.storage_ = std::move(storage_); // no atomic inc/dec
else
out = {storage_.get(), out.portion_};
return out;
}
byte_slice byte_slice::get_slice(const std::size_t begin, const std::size_t end) const
{
if (end < begin || portion_.size() < end)
throw std::out_of_range{"bad slice range"};
if (begin == end)
return {};
return {storage_.get(), {portion_.begin() + begin, end - begin}};
}
} // epee

4
tests/fuzz/levin.cpp
View file

@ -149,11 +149,11 @@ namespace
}
// Implement epee::net_utils::i_service_endpoint interface
virtual bool do_send(const void* ptr, size_t cb)
virtual bool do_send(epee::byte_slice message)
{
m_send_counter.inc();
boost::unique_lock<boost::mutex> lock(m_mutex);
m_last_send_data.append(reinterpret_cast<const char*>(ptr), cb);
m_last_send_data.append(reinterpret_cast<const char*>(message.data()), message.size());
return m_send_return;
}

6
tests/unit_tests/epee_levin_protocol_handler_async.cpp
View file

@ -140,12 +140,12 @@ namespace
}
// Implement epee::net_utils::i_service_endpoint interface
virtual bool do_send(const void* ptr, size_t cb)
virtual bool do_send(epee::byte_slice message)
{
//std::cout << "test_connection::do_send()" << std::endl;
m_send_counter.inc();
boost::unique_lock<boost::mutex> lock(m_mutex);
m_last_send_data.append(reinterpret_cast<const char*>(ptr), cb);
m_last_send_data.append(reinterpret_cast<const char*>(message.data()), message.size());
return m_send_return;
}
@ -367,8 +367,8 @@ TEST_F(positive_test_connection_to_levin_protocol_handler_calls, handler_process
// Parse send data
std::string send_data = conn->last_send_data();
epee::levin::bucket_head2 resp_head;
resp_head = *reinterpret_cast<const epee::levin::bucket_head2*>(send_data.data());
ASSERT_LT(sizeof(resp_head), send_data.size());
std::memcpy(std::addressof(resp_head), send_data.data(), sizeof(resp_head));
std::string out_data = send_data.substr(sizeof(resp_head));
// Check sent response

433
tests/unit_tests/epee_utils.cpp
View file

@ -44,6 +44,7 @@
#include "boost/archive/portable_binary_iarchive.hpp"
#include "boost/archive/portable_binary_oarchive.hpp"
#include "byte_slice.h"
#include "hex.h"
#include "net/net_utils_base.h"
#include "net/local_ip.h"
@ -375,6 +376,438 @@ TEST(Span, ToMutSpan)
EXPECT_EQ((std::vector<unsigned>{1, 2, 3, 4}), mut);
}
TEST(ByteSlice, Construction)
{
EXPECT_TRUE(std::is_default_constructible<epee::byte_slice>());
EXPECT_TRUE(std::is_move_constructible<epee::byte_slice>());
EXPECT_FALSE(std::is_copy_constructible<epee::byte_slice>());
EXPECT_TRUE(std::is_move_assignable<epee::byte_slice>());
EXPECT_FALSE(std::is_copy_assignable<epee::byte_slice>());
}
TEST(ByteSlice, NoExcept)
{
EXPECT_TRUE(std::is_nothrow_default_constructible<epee::byte_slice>());
EXPECT_TRUE(std::is_nothrow_move_constructible<epee::byte_slice>());
EXPECT_TRUE(std::is_nothrow_move_assignable<epee::byte_slice>());
epee::byte_slice lvalue{};
const epee::byte_slice clvalue{};
EXPECT_TRUE(noexcept(lvalue.clone()));
EXPECT_TRUE(noexcept(clvalue.clone()));
EXPECT_TRUE(noexcept(lvalue.begin()));
EXPECT_TRUE(noexcept(clvalue.begin()));
EXPECT_TRUE(noexcept(lvalue.end()));
EXPECT_TRUE(noexcept(clvalue.end()));
EXPECT_TRUE(noexcept(lvalue.cbegin()));
EXPECT_TRUE(noexcept(clvalue.cbegin()));
EXPECT_TRUE(noexcept(lvalue.cend()));
EXPECT_TRUE(noexcept(clvalue.cend()));
EXPECT_TRUE(noexcept(lvalue.empty()));
EXPECT_TRUE(noexcept(clvalue.empty()));
EXPECT_TRUE(noexcept(lvalue.data()));
EXPECT_TRUE(noexcept(clvalue.data()));
EXPECT_TRUE(noexcept(lvalue.size()));
EXPECT_TRUE(noexcept(clvalue.size()));
EXPECT_TRUE(noexcept(lvalue.remove_prefix(0)));
EXPECT_TRUE(noexcept(lvalue.take_slice(0)));
}
TEST(ByteSlice, Empty)
{
epee::byte_slice slice{};
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(0u, slice.size());
EXPECT_EQ(slice.begin(), slice.data());
EXPECT_EQ(0u, slice.get_slice(0, 0).size());
EXPECT_THROW(slice.get_slice(0, 1), std::out_of_range);
EXPECT_EQ(0u, slice.remove_prefix(1));
EXPECT_EQ(0u, slice.take_slice(1).size());
}
TEST(ByteSlice, CopySpans)
{
const epee::span<const std::uint8_t> part1 = epee::as_byte_span("this is part1");
const epee::span<const std::uint8_t> part2 = epee::as_byte_span("then part2");
const epee::span<const std::uint8_t> part3 = epee::as_byte_span("finally part3");
const epee::byte_slice slice{part1, part2, part3};
EXPECT_NE(nullptr, slice.begin());
EXPECT_NE(nullptr, slice.end());
EXPECT_NE(slice.begin(), slice.end());
EXPECT_NE(slice.cbegin(), slice.cend());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
ASSERT_EQ(slice.size(), std::size_t(slice.end() - slice.begin()));
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.begin(), slice.data());
ASSERT_EQ(part1.size() + part2.size() + part3.size(), slice.size());
EXPECT_TRUE(
boost::range::equal(
part1, boost::make_iterator_range(slice.begin(), slice.begin() + part1.size())
)
);
EXPECT_TRUE(
boost::range::equal(
part2, boost::make_iterator_range(slice.begin() + part1.size(), slice.end() - part3.size())
)
);
EXPECT_TRUE(
boost::range::equal(
part3, boost::make_iterator_range(slice.end() - part3.size(), slice.end())
)
);
}
TEST(ByteSlice, AdaptString)
{
static constexpr const char base_string[] = "this is an example message";
std::string adapted = base_string;
const epee::span<const uint8_t> original = epee::to_byte_span(epee::to_span(adapted));
const epee::byte_slice slice{std::move(adapted)};
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(original.cbegin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(original.cend(), slice.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(original.data(), slice.data());
EXPECT_EQ(original.size(), slice.size());
EXPECT_TRUE(boost::range::equal(boost::string_ref{base_string}, slice));
}
TEST(ByteSlice, EmptyAdaptString)
{
epee::byte_slice slice{std::string{}};
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(0u, slice.size());
EXPECT_EQ(slice.begin(), slice.data());
EXPECT_EQ(0u, slice.get_slice(0, 0).size());
EXPECT_THROW(slice.get_slice(0, 1), std::out_of_range);
EXPECT_EQ(0u, slice.remove_prefix(1));
EXPECT_EQ(0u, slice.take_slice(1).size());
}
TEST(ByteSlice, AdaptVector)
{
static constexpr const char base_string[] = "this is an example message";
std::vector<std::uint8_t> adapted(sizeof(base_string));
ASSERT_EQ(sizeof(base_string), adapted.size());
std::memcpy(adapted.data(), base_string, sizeof(base_string));
const epee::span<const uint8_t> original = epee::to_span(adapted);
const epee::byte_slice slice{std::move(adapted)};
EXPECT_EQ(sizeof(base_string), original.size());
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(original.cbegin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(original.cend(), slice.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(original.data(), slice.data());
EXPECT_EQ(original.size(), slice.size());
EXPECT_TRUE(boost::range::equal(base_string, slice));
}
TEST(ByteSlice, EmptyAdaptVector)
{
epee::byte_slice slice{std::vector<std::uint8_t>{}};
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(0u, slice.size());
EXPECT_EQ(slice.begin(), slice.data());
EXPECT_EQ(0u, slice.get_slice(0, 0).size());
EXPECT_THROW(slice.get_slice(0, 1), std::out_of_range);
EXPECT_EQ(0u, slice.remove_prefix(1));
EXPECT_EQ(0u, slice.take_slice(1).size());
}
TEST(ByteSlice, Move)
{
static constexpr const char base_string[] = "another example message";
epee::byte_slice slice{epee::as_byte_span(base_string)};
EXPECT_TRUE(boost::range::equal(base_string, slice));
const epee::span<const std::uint8_t> original = epee::to_span(slice);
epee::byte_slice moved{std::move(slice)};
EXPECT_TRUE(boost::range::equal(base_string, moved));
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_EQ(original.begin(), moved.begin());
EXPECT_EQ(moved.begin(), moved.cbegin());
EXPECT_EQ(original.end(), moved.end());
EXPECT_EQ(moved.end(), moved.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(slice.begin(), slice.data());
EXPECT_EQ(0u, slice.size());
EXPECT_FALSE(moved.empty());
EXPECT_EQ(moved.begin(), moved.data());
EXPECT_EQ(original.size(), moved.size());
slice = std::move(moved);
EXPECT_TRUE(boost::range::equal(base_string, slice));
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.begin(), slice.data());
EXPECT_EQ(original.size(), slice.size());
EXPECT_TRUE(moved.empty());
EXPECT_EQ(moved.begin(), moved.data());
EXPECT_EQ(0u, moved.size());
}
TEST(ByteSlice, Clone)
{
static constexpr const char base_string[] = "another example message";
const epee::byte_slice slice{epee::as_byte_span(base_string)};
EXPECT_TRUE(boost::range::equal(base_string, slice));
const epee::byte_slice clone{slice.clone()};
EXPECT_TRUE(boost::range::equal(base_string, clone));
EXPECT_EQ(slice.begin(), clone.begin());
EXPECT_EQ(slice.cbegin(), clone.cbegin());
EXPECT_EQ(slice.end(), clone.end());
EXPECT_EQ(slice.cend(), clone.cend());
EXPECT_FALSE(slice.empty());
EXPECT_FALSE(clone.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(slice.data(), clone.data());
EXPECT_EQ(sizeof(base_string), slice.size());
EXPECT_EQ(slice.size(), clone.size());
}
TEST(ByteSlice, RemovePrefix)
{
static constexpr const char base_string[] = "another example message";
static constexpr std::size_t remove_size = sizeof("another");
static constexpr std::size_t remaining = sizeof(base_string) - remove_size;
epee::byte_slice slice{epee::as_byte_span(base_string)};
EXPECT_TRUE(boost::range::equal(base_string, slice));
const epee::span<const std::uint8_t> original = epee::to_span(slice);
EXPECT_EQ(remove_size, slice.remove_prefix(remove_size));
EXPECT_EQ(original.begin() + remove_size, slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(remaining, slice.size());
// touch original pointers to check "free" status
EXPECT_TRUE(boost::range::equal(base_string, original));
EXPECT_EQ(remaining, slice.remove_prefix(remaining + 1));
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(0, slice.size());
}
TEST(ByteSlice, TakeSlice)
{
static constexpr const char base_string[] = "another example message";
static constexpr std::size_t remove_size = sizeof("another");
static constexpr std::size_t remaining = sizeof(base_string) - remove_size;
epee::byte_slice slice{epee::as_byte_span(base_string)};
EXPECT_TRUE(boost::range::equal(base_string, slice));
const epee::span<const std::uint8_t> original = epee::to_span(slice);
const epee::byte_slice slice2 = slice.take_slice(remove_size);
EXPECT_EQ(original.begin() + remove_size, slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_EQ(original.begin(), slice2.begin());
EXPECT_EQ(slice2.begin(), slice2.cbegin());
EXPECT_EQ(original.begin() + remove_size, slice2.end());
EXPECT_EQ(slice2.end(), slice2.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(remaining, slice.size());
EXPECT_FALSE(slice2.empty());
EXPECT_EQ(slice2.cbegin(), slice2.data());
EXPECT_EQ(remove_size, slice2.size());
// touch original pointers to check "free" status
EXPECT_TRUE(boost::range::equal(base_string, original));
const epee::byte_slice slice3 = slice.take_slice(remaining + 1);
EXPECT_EQ(slice.begin(), slice.end());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_EQ(original.begin(), slice2.begin());
EXPECT_EQ(slice2.begin(), slice2.cbegin());
EXPECT_EQ(original.begin() + remove_size, slice2.end());
EXPECT_EQ(slice2.end(), slice2.cend());
EXPECT_EQ(slice2.end(), slice3.begin());
EXPECT_EQ(slice3.begin(), slice3.cbegin());
EXPECT_EQ(original.end(), slice3.end());
EXPECT_EQ(slice3.end(), slice3.cend());
EXPECT_TRUE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(0, slice.size());
EXPECT_FALSE(slice2.empty());
EXPECT_EQ(slice2.cbegin(), slice2.data());
EXPECT_EQ(remove_size, slice2.size());
EXPECT_FALSE(slice3.empty());
EXPECT_EQ(slice3.cbegin(), slice3.data());
EXPECT_EQ(remaining, slice3.size());
// touch original pointers to check "free" status
slice = nullptr;
EXPECT_TRUE(boost::range::equal(base_string, original));
}
TEST(ByteSlice, GetSlice)
{
static constexpr const char base_string[] = "another example message";
static constexpr std::size_t get_size = sizeof("another");
static constexpr std::size_t get2_size = sizeof(base_string) - get_size;
epee::span<const std::uint8_t> original{};
epee::byte_slice slice2{};
epee::byte_slice slice3{};
// make sure get_slice increments ref count
{
const epee::byte_slice slice{epee::as_byte_span(base_string)};
EXPECT_TRUE(boost::range::equal(base_string, slice));
original = epee::to_span(slice);
slice2 = slice.get_slice(0, get_size);
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_EQ(original.begin(), slice2.begin());
EXPECT_EQ(slice2.begin(), slice2.cbegin());
EXPECT_EQ(original.begin() + get_size, slice2.end());
EXPECT_EQ(slice2.end(), slice2.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(original.size(), slice.size());
EXPECT_FALSE(slice2.empty());
EXPECT_EQ(slice2.cbegin(), slice2.data());
EXPECT_EQ(get_size, slice2.size());
// touch original pointers to check "free" status
EXPECT_TRUE(boost::range::equal(base_string, original));
slice3 = slice.get_slice(get_size, sizeof(base_string));
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_EQ(original.begin(), slice2.begin());
EXPECT_EQ(slice2.begin(), slice2.cbegin());
EXPECT_EQ(original.begin() + get_size, slice2.end());
EXPECT_EQ(slice2.end(), slice2.cend());
EXPECT_EQ(slice2.end(), slice3.begin());
EXPECT_EQ(slice3.begin(), slice3.cbegin());
EXPECT_EQ(original.end(), slice3.end());
EXPECT_EQ(slice3.end(), slice3.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(original.size(), slice.size());
EXPECT_FALSE(slice2.empty());
EXPECT_EQ(slice2.cbegin(), slice2.data());
EXPECT_EQ(get_size, slice2.size());
EXPECT_FALSE(slice3.empty());
EXPECT_EQ(slice3.cbegin(), slice3.data());
EXPECT_EQ(get2_size, slice3.size());
EXPECT_THROW(slice.get_slice(1, 0), std::out_of_range);
EXPECT_THROW(slice.get_slice(0, sizeof(base_string) + 1), std::out_of_range);
EXPECT_THROW(slice.get_slice(sizeof(base_string) + 1, sizeof(base_string) + 1), std::out_of_range);
EXPECT_TRUE(slice.get_slice(sizeof(base_string), sizeof(base_string)).empty());
EXPECT_EQ(original.begin(), slice.begin());
EXPECT_EQ(slice.begin(), slice.cbegin());
EXPECT_EQ(original.end(), slice.end());
EXPECT_EQ(slice.end(), slice.cend());
EXPECT_FALSE(slice.empty());
EXPECT_EQ(slice.cbegin(), slice.data());
EXPECT_EQ(original.size(), slice.size());
}
// touch original pointers to check "free" status
EXPECT_TRUE(boost::range::equal(base_string, original));
}
TEST(ToHex, String)
{
EXPECT_TRUE(epee::to_hex::string(nullptr).empty());