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protocol: option to pad transaction relay to the next kB

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To help protect one's privacy from traffic volume analysis
for people using Tor or I2P. This will really fly once we
relay txes on a timer rather than on demand, though.

Off by default for now since it's wasteful and doesn't bring
anything until I2P's in.
This commit is contained in:
moneromooo-monero 2018-11-02 22:27:25 +00:00
parent 963d247154
commit 3dba7f252e
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
6 changed files with 52 additions and 1 deletions
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10
src/cryptonote_core/cryptonote_core.cpp
View file

@ -163,6 +163,11 @@ namespace cryptonote
, "Relay blocks as normal blocks"
, false
};
static const command_line::arg_descriptor<bool> arg_pad_transactions = {
"pad-transactions"
, "Pad relayed transactions to help defend against traffic volume analysis"
, false
};
static const command_line::arg_descriptor<size_t> arg_max_txpool_weight = {
"max-txpool-weight"
, "Set maximum txpool weight in bytes."
@ -188,7 +193,8 @@ namespace cryptonote
m_disable_dns_checkpoints(false),
m_update_download(0),
m_nettype(UNDEFINED),
m_update_available(false)
m_update_available(false),
m_pad_transactions(false)
{
m_checkpoints_updating.clear();
set_cryptonote_protocol(pprotocol);
@ -282,6 +288,7 @@ namespace cryptonote
command_line::add_arg(desc, arg_offline);
command_line::add_arg(desc, arg_disable_dns_checkpoints);
command_line::add_arg(desc, arg_max_txpool_weight);
command_line::add_arg(desc, arg_pad_transactions);
command_line::add_arg(desc, arg_block_notify);
miner::init_options(desc);
@ -320,6 +327,7 @@ namespace cryptonote
set_enforce_dns_checkpoints(command_line::get_arg(vm, arg_dns_checkpoints));
test_drop_download_height(command_line::get_arg(vm, arg_test_drop_download_height));
m_fluffy_blocks_enabled = !get_arg(vm, arg_no_fluffy_blocks);
m_pad_transactions = get_arg(vm, arg_pad_transactions);
m_offline = get_arg(vm, arg_offline);
m_disable_dns_checkpoints = get_arg(vm, arg_disable_dns_checkpoints);
if (!command_line::is_arg_defaulted(vm, arg_fluffy_blocks))

8
src/cryptonote_core/cryptonote_core.h
View file

@ -756,6 +756,13 @@ namespace cryptonote
*/
bool fluffy_blocks_enabled() const { return m_fluffy_blocks_enabled; }
/**
* @brief get whether transaction relay should be padded
*
* @return whether transaction relay should be padded
*/
bool pad_transactions() const { return m_pad_transactions; }
/**
* @brief check a set of hashes against the precompiled hash set
*
@ -1014,6 +1021,7 @@ namespace cryptonote
bool m_fluffy_blocks_enabled;
bool m_offline;
bool m_pad_transactions;
};
}