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/*
* Copyright (c) 2017 Samsung Electronics Co., Ltd. All rights reserved.
*
* 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 <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "notification_ipc.h"
#include "notification_debug.h"
#define RCV_SOCK 0
#define SND_SOCK 1
#define MAX_RETRY_CNT 10
#define WRITE_TIMEOUT 20 /* milliseconds*/
EXPORT_API int notification_ipc_socket_pair(int *fd)
{
int ret_fd[2];
int err;
if (fd == NULL)
return NOTIFICATION_ERROR_INVALID_PARAMETER;
errno = 0;
err = socketpair(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0, ret_fd);
if (err < 0) {
ERR("socketpair [%d]", errno);
return NOTIFICATION_ERROR_IO_ERROR;
}
fd[RCV_SOCK] = ret_fd[RCV_SOCK];
fd[SND_SOCK] = ret_fd[SND_SOCK];
return NOTIFICATION_ERROR_NONE;
}
static int __get_socket_buffer_size(int fd, unsigned int *size, int optname)
{
unsigned int ret_size = 0;
socklen_t len = sizeof(ret_size);
errno = 0;
if (getsockopt(fd, SOL_SOCKET, optname, &ret_size, &len) < 0) {
ERR("read socket size [%d]", errno);
return NOTIFICATION_ERROR_IO_ERROR;
}
*size = ret_size;
return NOTIFICATION_ERROR_NONE;
}
EXPORT_API int notification_ipc_socket_get_read_buf_size(int fd, unsigned int *size)
{
return __get_socket_buffer_size(fd, size, SO_RCVBUF);
}
EXPORT_API int notification_ipc_socket_get_write_buf_size(int fd, unsigned int *size)
{
return __get_socket_buffer_size(fd, size, SO_SNDBUF);
}
EXPORT_API int notification_ipc_socket_write(int fd, const char *buffer, unsigned int nbytes)
{
int retry_cnt = 0;
unsigned int left = nbytes;
ssize_t nb;
const struct timespec SLEEP_TIME = { 0, 20 * 1000 * 1000 };
while (left && (retry_cnt < MAX_RETRY_CNT)) {
errno = 0;
nb = write(fd, buffer, left);
if (nb == -1) {
if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) {
ERR("continue..");
retry_cnt++;
nanosleep(&SLEEP_TIME, 0);
continue;
}
ERR("error fd [%d] errno [%d]", fd, errno);
return NOTIFICATION_ERROR_IO_ERROR;
}
left -= nb;
buffer += nb;
retry_cnt = 0;
}
if (left != 0) {
ERR("error fd [%d], retry_cnt [%d]", fd, retry_cnt);
return NOTIFICATION_ERROR_IO_ERROR;
}
return NOTIFICATION_ERROR_NONE;
}
EXPORT_API int notification_ipc_socket_write_string(int fd, const char *buffer, unsigned int string_len)
{
int ret;
ret = notification_ipc_socket_write(fd, (char *)&string_len, sizeof(string_len));
if (ret != NOTIFICATION_ERROR_NONE) {
ERR("write string_len fail");
return ret;
}
if (string_len > 0) {
ret = notification_ipc_socket_write(fd, buffer, string_len);
if (ret != NOTIFICATION_ERROR_NONE) {
ERR("write string fail");
return ret;
}
}
return NOTIFICATION_ERROR_NONE;
}
EXPORT_API int notification_ipc_socket_read(int fd, char *buffer, unsigned int nbytes)
{
unsigned int left = nbytes;
ssize_t nb;
int retry_cnt = 0;
const struct timespec SLEEP_TIME = { 0, 20 * 1000 * 1000 };
while (left && (retry_cnt < MAX_RETRY_CNT)) {
errno = 0;
nb = read(fd, buffer, left);
if (nb == 0) {
ERR("read socket - EOF, fd close [%d]", fd);
return NOTIFICATION_ERROR_IO_ERROR;
} else if (nb == -1) {
if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) {
ERR("errno [%d], sleep and retry", errno);
retry_cnt++;
nanosleep(&SLEEP_TIME, 0);
continue;
}
ERR("errno [%d] fd [%d]", errno, fd);
return NOTIFICATION_ERROR_IO_ERROR;
}
left -= nb;
buffer += nb;
retry_cnt = 0;
}
if (left != 0) {
ERR("error fd [%d] retry_cnt [%d]", fd, retry_cnt);
return NOTIFICATION_ERROR_IO_ERROR;
}
return NOTIFICATION_ERROR_NONE;
}
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