mirror of
https://github.com/matrix-construct/construct
synced 2024-09-10 18:51:37 +02:00
140 lines
2.8 KiB
C++
140 lines
2.8 KiB
C++
|
// The Construct
|
||
|
//
|
||
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
||
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
||
|
//
|
||
|
// Permission to use, copy, modify, and/or distribute this software for any
|
||
|
// purpose with or without fee is hereby granted, provided that the above
|
||
|
// copyright notice and this permission notice is present in all copies. The
|
||
|
// full license for this software is available in the LICENSE file.
|
||
|
|
||
|
decltype(ircd::m::gossip::log)
|
||
|
ircd::m::gossip::log
|
||
|
{
|
||
|
"m.gossip"
|
||
|
};
|
||
|
|
||
|
/// Initial gossip protocol works by sending the remote server some events which
|
||
|
/// reference an event contained in the remote's head which we just obtained.
|
||
|
/// This is part of a family of active measures taken to reduce forward
|
||
|
/// extremities on other servers but without polluting the chain with
|
||
|
/// permanent data for this purpose such as with org.matrix.dummy_event.
|
||
|
ircd::m::gossip::gossip::gossip(const room::id &room_id,
|
||
|
const opts &opts)
|
||
|
{
|
||
|
assert(opts.event_id);
|
||
|
const auto &event_id
|
||
|
{
|
||
|
opts.event_id
|
||
|
};
|
||
|
|
||
|
const m::event::refs refs
|
||
|
{
|
||
|
m::index(std::nothrow, event_id)
|
||
|
};
|
||
|
|
||
|
static const size_t max{48};
|
||
|
const size_t count
|
||
|
{
|
||
|
std::min(refs.count(dbs::ref::NEXT), max)
|
||
|
};
|
||
|
|
||
|
if(!count)
|
||
|
return;
|
||
|
|
||
|
const unique_mutable_buffer buf[]
|
||
|
{
|
||
|
{ event::MAX_SIZE * (count + 1) },
|
||
|
{ 16_KiB },
|
||
|
};
|
||
|
|
||
|
size_t i{0};
|
||
|
std::array<event::idx, max> next_idx;
|
||
|
refs.for_each(dbs::ref::NEXT, [&next_idx, &i]
|
||
|
(const event::idx &event_idx, const auto &ref_type)
|
||
|
{
|
||
|
assert(ref_type == dbs::ref::NEXT);
|
||
|
next_idx.at(i) = event_idx;
|
||
|
return ++i < next_idx.size();
|
||
|
});
|
||
|
|
||
|
size_t ret{0};
|
||
|
json::stack out{buf[0]};
|
||
|
{
|
||
|
json::stack::object top
|
||
|
{
|
||
|
out
|
||
|
};
|
||
|
|
||
|
json::stack::member
|
||
|
{
|
||
|
top, "origin", m::my_host()
|
||
|
};
|
||
|
|
||
|
json::stack::member
|
||
|
{
|
||
|
top, "origin_server_ts", json::value
|
||
|
{
|
||
|
long(ircd::time<milliseconds>())
|
||
|
}
|
||
|
};
|
||
|
|
||
|
json::stack::array pdus
|
||
|
{
|
||
|
top, "pdus"
|
||
|
};
|
||
|
|
||
|
m::event::fetch event;
|
||
|
for(assert(ret == 0); ret < i; ++ret)
|
||
|
if(seek(std::nothrow, event, next_idx.at(ret)))
|
||
|
pdus.append(event.source);
|
||
|
}
|
||
|
|
||
|
const string_view txn
|
||
|
{
|
||
|
out.completed()
|
||
|
};
|
||
|
|
||
|
char idbuf[64];
|
||
|
const string_view txnid
|
||
|
{
|
||
|
m::txn::create_id(idbuf, txn)
|
||
|
};
|
||
|
|
||
|
m::fed::send::opts fedopts;
|
||
|
fedopts.remote = opts.remote;
|
||
|
m::fed::send request
|
||
|
{
|
||
|
txnid, txn, buf[1], std::move(fedopts)
|
||
|
};
|
||
|
|
||
|
http::code code{0};
|
||
|
std::exception_ptr eptr;
|
||
|
if(request.wait(opts.timeout, std::nothrow)) try
|
||
|
{
|
||
|
code = request.get();
|
||
|
ret += code == http::OK;
|
||
|
}
|
||
|
catch(...)
|
||
|
{
|
||
|
eptr = std::current_exception();
|
||
|
}
|
||
|
|
||
|
log::logf
|
||
|
{
|
||
|
log, code == http::OK? log::DEBUG : log::DERROR,
|
||
|
"gossip %zu:%zu to %s reference to %s in %s :%s %s",
|
||
|
ret,
|
||
|
count,
|
||
|
opts.remote,
|
||
|
string_view{event_id},
|
||
|
string_view{room_id},
|
||
|
code?
|
||
|
status(code):
|
||
|
"failed",
|
||
|
eptr?
|
||
|
what(eptr):
|
||
|
string_view{},
|
||
|
};
|
||
|
}
|