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/*
* Copyright (C) 2020 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#include "tls_service_v1.hpp"
#include "wsrep/tls_service.hpp"
#include "wsrep/logger.hpp"
#include "v26/wsrep_tls_service.h"
#include "service_helpers.hpp"
#include <cassert>
namespace wsrep_tls_service_v1
{
static wsrep::tls_service* tls_service_impl{0};
static std::atomic<size_t> use_count;
static int tls_stream_init_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
stream->opaque =
tls_service_impl->create_tls_stream(stream->fd);
if (not stream->opaque)
{
return ENOMEM;
}
return 0;
}
static void tls_stream_deinit_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
tls_service_impl->destroy(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque));
}
static int tls_stream_get_error_number_cb(
wsrep_tls_context_t*,
const wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
return tls_service_impl->get_error_number(
reinterpret_cast<const wsrep::tls_stream*>(stream->opaque));
}
static const void* tls_stream_get_error_category_cb(
wsrep_tls_context_t*,
const wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
return tls_service_impl->get_error_category(
reinterpret_cast<const wsrep::tls_stream*>(stream->opaque));
}
static const char* tls_error_message_get_cb(
wsrep_tls_context_t*,
const wsrep_tls_stream_t* stream,
int value, const void* category)
{
assert(tls_service_impl);
return tls_service_impl->get_error_message(
reinterpret_cast<const wsrep::tls_stream*>(stream->opaque), value, category);
}
static enum wsrep_tls_result map_return_value(ssize_t status)
{
switch (status)
{
case wsrep::tls_service::success:
return wsrep_tls_result_success;
case wsrep::tls_service::want_read:
return wsrep_tls_result_want_read;
case wsrep::tls_service::want_write:
return wsrep_tls_result_want_write;
case wsrep::tls_service::eof:
return wsrep_tls_result_eof;
case wsrep::tls_service::error:
return wsrep_tls_result_error;
default:
assert(status < 0);
return wsrep_tls_result_error;
}
}
static enum wsrep_tls_result
tls_stream_client_handshake_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
return map_return_value(
tls_service_impl->client_handshake(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque)));
}
static enum wsrep_tls_result
tls_stream_server_handshake_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
return map_return_value(
tls_service_impl->server_handshake(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque)));
}
static enum wsrep_tls_result tls_stream_read_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream,
void* buf,
size_t max_count,
size_t* bytes_transferred)
{
assert(tls_service_impl);
auto result(tls_service_impl->read(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque),
buf, max_count));
*bytes_transferred = result.bytes_transferred;
return map_return_value(result.status);
}
static enum wsrep_tls_result tls_stream_write_cb(
wsrep_tls_context_t*,
wsrep_tls_stream_t* stream,
const void* buf,
size_t count,
size_t* bytes_transferred)
{
assert(tls_service_impl);
auto result(tls_service_impl->write(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque),
buf, count));
*bytes_transferred = result.bytes_transferred;
return map_return_value(result.status);
}
static enum wsrep_tls_result
tls_stream_shutdown_cb(wsrep_tls_context_t*,
wsrep_tls_stream_t* stream)
{
assert(tls_service_impl);
// @todo Handle other values than success.
return map_return_value(
tls_service_impl->shutdown(
reinterpret_cast<wsrep::tls_stream*>(stream->opaque)));
}
static wsrep_tls_service_v1_t tls_service_callbacks =
{
tls_stream_init_cb,
tls_stream_deinit_cb,
tls_stream_get_error_number_cb,
tls_stream_get_error_category_cb,
tls_stream_client_handshake_cb,
tls_stream_server_handshake_cb,
tls_stream_read_cb,
tls_stream_write_cb,
tls_stream_shutdown_cb,
tls_error_message_get_cb,
0 // we pass NULL context for now.
};
}
int wsrep::tls_service_v1_probe(void* dlh)
{
typedef int (*init_fn)(wsrep_tls_service_v1_t*);
typedef void (*deinit_fn)();
if (wsrep_impl::service_probe<init_fn>(
dlh, WSREP_TLS_SERVICE_INIT_FUNC_V1, "tls service v1") ||
wsrep_impl::service_probe<deinit_fn>(
dlh, WSREP_TLS_SERVICE_DEINIT_FUNC_V1, "tls service v1"))
{
wsrep::log_warning() << "Provider does not support tls service v1";
return 1;
}
return 0;
}
int wsrep::tls_service_v1_init(void* dlh,
wsrep::tls_service* tls_service)
{
if (not (dlh && tls_service)) return EINVAL;
typedef int (*init_fn)(wsrep_tls_service_v1_t*);
wsrep_tls_service_v1::tls_service_impl = tls_service;
int ret(0);
if ((ret = wsrep_impl::service_init<init_fn>(
dlh, WSREP_TLS_SERVICE_INIT_FUNC_V1,
&wsrep_tls_service_v1::tls_service_callbacks,
"tls service v1")))
{
wsrep_tls_service_v1::tls_service_impl = 0;
}
else
{
++wsrep_tls_service_v1::use_count;
}
return ret;
}
void wsrep::tls_service_v1_deinit(void* dlh)
{
typedef int (*deinit_fn)();
wsrep_impl::service_deinit<deinit_fn>(
dlh, WSREP_TLS_SERVICE_DEINIT_FUNC_V1, "tls service v1");
--wsrep_tls_service_v1::use_count;
if (wsrep_tls_service_v1::use_count == 0)
{
wsrep_tls_service_v1::tls_service_impl = 0;
}
}
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