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/* Copyright 2020-2021 IGEL Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "test-socket-client.h"
#include <check.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include "dlm-protocol.h"
#include "socket-path.h"
#define DEFAULT_RECV_TIMEOUT (100) // timeout in ms to receive data from server
struct client_state {
pthread_t tid;
int socket_fd;
struct test_config *config;
};
static void send_lease_request(int socket, enum dlm_opcode opcode)
{
struct dlm_client_request req = {
.opcode = opcode,
};
send_dlm_client_request(socket, &req);
}
static void client_gst_socket_status(int socket_fd, struct test_config *config)
{
config->connection_completed = true;
struct pollfd pfd = {.fd = socket_fd, .events = POLLIN};
if (poll(&pfd, 1, config->recv_timeout) <= 0)
return;
if (pfd.revents & POLLHUP)
config->connection_completed = false;
if (pfd.revents & POLLIN)
config->has_data = true;
return;
}
static int receive_fd_from_socket(int sockfd)
{
union {
struct cmsghdr align;
char buf[CMSG_SPACE(sizeof(int))];
} u;
char data;
struct iovec iov = {.iov_base = &data, .iov_len = sizeof(data)};
struct msghdr msg = {
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_control = u.buf,
.msg_controllen = sizeof(u.buf),
};
if (recvmsg(sockfd, &msg, 0) < 0)
return -1;
int recv_fd = -1;
for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
ck_assert_int_eq(cmsg->cmsg_level, SOL_SOCKET);
if (cmsg->cmsg_type != SCM_RIGHTS)
continue;
int nfds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
ck_assert_int_eq(nfds, 1);
recv_fd = *(int *)CMSG_DATA(cmsg);
}
return recv_fd;
}
static void *test_client_thread(void *arg)
{
struct client_state *cstate = arg;
struct test_config *config = cstate->config;
struct sockaddr_un address = {
.sun_family = AF_UNIX,
};
ck_assert_int_eq(
sockaddr_set_lease_server_path(&address, config->lease->name),
true);
int client = socket(PF_UNIX, SOCK_SEQPACKET, 0);
ck_assert_int_ge(client, 0);
int ret;
ret = connect(client, (struct sockaddr *)&address, sizeof(address));
if (ret != 0) {
printf("Connect failed;: %s\n", strerror(errno));
close(client);
return NULL;
}
send_lease_request(client, DLM_GET_LEASE);
if (!config->recv_timeout)
config->recv_timeout = DEFAULT_RECV_TIMEOUT;
client_gst_socket_status(client, config);
if (config->has_data) {
config->received_fd = receive_fd_from_socket(client);
}
cstate->socket_fd = client;
send_lease_request(client, DLM_RELEASE_LEASE);
return NULL;
}
struct client_state *test_client_start(struct test_config *test_config)
{
struct client_state *cstate = malloc(sizeof(*cstate));
*cstate = (struct client_state){
.config = test_config,
};
pthread_create(&cstate->tid, NULL, test_client_thread, cstate);
return cstate;
}
void test_client_stop(struct client_state *cstate)
{
ck_assert_ptr_ne(cstate, NULL);
pthread_join(cstate->tid, NULL);
if (cstate->socket_fd >= 0)
close(cstate->socket_fd);
free(cstate);
}
void test_config_cleanup(struct test_config *config)
{
if (config->has_data && config->received_fd >= 0)
close(config->received_fd);
}
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