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/*
* Copyright (c) 2015-2020 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Jan Friesse (jfriesse@redhat.com)
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - 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.
* - Neither the name of the Red Hat, Inc. 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 OWNER 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 <sys/types.h>
#include <pk11func.h>
#include "log.h"
#include "qnetd-instance.h"
#include "qnetd-client.h"
#include "qnetd-client-dpd-timer.h"
#include "qnetd-algorithm.h"
#include "qnetd-log-debug.h"
#include "qnetd-client-algo-timer.h"
static int
qnetd_instance_poll_loop_pre_poll_cb(void *user_data1, void *user_data2)
{
struct qnetd_instance *instance = (struct qnetd_instance *)user_data1;
struct qnetd_client *client;
struct qnetd_client *client_next;
/*
* This functionality used to be per client fd in
* the qnetd_client_net_socket_poll_loop_set_events_cb. Problem is, that
* disconnect calls algorithm which may send message to other client
* with fd which was already processed in the pr-poll-loop so POLLOUT is
* not set till new loop exec is called (and that usually happens
* because old one timeouts). To reproduce this problem use
* ffsplit and make qnetd disconnect one of the clients - ffsplit needs to
* send ack/nack votes, but it doesn't send them during first iteration
* and waits for dpd timeout.
*/
client = TAILQ_FIRST(&instance->clients);
while (client != NULL) {
client_next = TAILQ_NEXT(client, entries);
if (client->schedule_disconnect) {
if (pr_poll_loop_del_prfd(&instance->main_poll_loop,
client->socket) == -1) {
log(LOG_ERR, "pr_poll_loop_del_prfd for client socket failed");
return (-1);
}
qnetd_instance_client_disconnect(instance, client, 0);
}
client = client_next;
}
return (0);
}
int
qnetd_instance_init(struct qnetd_instance *instance,
enum tlv_tls_supported tls_supported, int tls_client_cert_required, size_t max_clients,
const struct qnetd_advanced_settings *advanced_settings)
{
memset(instance, 0, sizeof(*instance));
instance->advanced_settings = advanced_settings;
qnetd_client_list_init(&instance->clients);
qnetd_cluster_list_init(&instance->clusters);
instance->tls_supported = tls_supported;
instance->tls_client_cert_required = tls_client_cert_required;
instance->max_clients = max_clients;
pr_poll_loop_init(&instance->main_poll_loop);
if (pr_poll_loop_add_pre_poll_cb(&instance->main_poll_loop,
qnetd_instance_poll_loop_pre_poll_cb,
instance, NULL) == -1) {
log(LOG_ERR, "Can't add instance pre poll loop cb");
return (-1);
}
return (0);
}
int
qnetd_instance_destroy(struct qnetd_instance *instance)
{
struct qnetd_client *client;
struct qnetd_client *client_next;
client = TAILQ_FIRST(&instance->clients);
while (client != NULL) {
client_next = TAILQ_NEXT(client, entries);
qnetd_instance_client_disconnect(instance, client, 1);
client = client_next;
}
qnetd_cluster_list_free(&instance->clusters);
qnetd_client_list_free(&instance->clients);
if (pr_poll_loop_del_pre_poll_cb(&instance->main_poll_loop,
qnetd_instance_poll_loop_pre_poll_cb) == -1) {
log(LOG_WARNING, "Can't delete instance pre poll loop cb");
}
pr_poll_loop_destroy(&instance->main_poll_loop);
return (0);
}
void
qnetd_instance_client_disconnect(struct qnetd_instance *instance, struct qnetd_client *client,
int server_going_down)
{
qnetd_log_debug_client_disconnect(client, server_going_down);
if (client->init_received) {
qnetd_algorithm_client_disconnect(client, server_going_down);
}
qnetd_client_dpd_timer_destroy(instance, client);
PR_Close(client->socket);
if (client->cluster != NULL) {
qnetd_cluster_list_del_client(&instance->clusters, client->cluster, client);
}
qnetd_client_algo_timer_abort(client);
qnetd_client_list_del(&instance->clients, client);
}
int
qnetd_instance_init_certs(struct qnetd_instance *instance)
{
instance->server.cert = PK11_FindCertFromNickname(
instance->advanced_settings->cert_nickname, NULL);
if (instance->server.cert == NULL) {
return (-1);
}
instance->server.private_key = PK11_FindKeyByAnyCert(instance->server.cert, NULL);
if (instance->server.private_key == NULL) {
return (-1);
}
return (0);
}
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