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/*
* SPDX license identifier: MPL-2.0
*
* Copyright (C) 2015, Advanced Driver Information Technology
* Copyright of Advanced Driver Information Technology, Bosch and Denso
*
* This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
*
* This Source Code Form is subject to the terms of the
* Mozilla Public License (MPL), v. 2.0.
* If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For further information see http://www.genivi.org/.
*/
/*!
* \author
* Christoph Lipka <clipka@jp.adit-jv.com>
*
* \copyright Copyright © 2015 ADIT. \n
* License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
*
* \file dlt_daemon_unix_socket.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/un.h>
#if defined(ANDROID)
# include <cutils/sockets.h> /* for android_get_control_socket() */
# include <libgen.h> /* for basename() */
#else
# include <sys/socket.h> /* for socket(), connect(), (), and recv() */
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <syslog.h>
#include <errno.h>
#if DLT_SYSTEM_SOCKET_ACTIVATION_ENABLE
#include <systemd/sd-daemon.h>
#endif
#include "dlt-daemon.h"
#include "dlt_common.h"
#include "dlt-daemon_cfg.h"
#include "dlt_daemon_socket.h"
#include "dlt_daemon_unix_socket.h"
#ifdef ANDROID
DltReturnValue dlt_daemon_unix_android_get_socket(int *sock, const char *sock_path)
{
DltReturnValue ret = DLT_RETURN_OK;
if ((sock == NULL) || (sock_path == NULL)) {
dlt_log(LOG_ERR, "dlt_daemon_unix_android_get_socket: arguments invalid");
ret = DLT_RETURN_WRONG_PARAMETER;
}
else {
const char* sock_name = basename(sock_path);
if (sock_name == NULL) {
dlt_log(LOG_WARNING,
"dlt_daemon_unix_android_get_socket: can't get socket name from its path");
ret = DLT_RETURN_ERROR;
}
else {
*sock = android_get_control_socket(sock_name);
if (*sock < 0) {
dlt_log(LOG_WARNING,
"dlt_daemon_unix_android_get_socket: can get socket from init");
ret = DLT_RETURN_ERROR;
}
else {
if (listen(*sock, 1) == -1) {
dlt_vlog(LOG_WARNING, "unix socket: listen error: %s", strerror(errno));
ret = DLT_RETURN_ERROR;
}
}
}
}
return ret;
}
#endif
int dlt_daemon_unix_socket_open(int *sock, char *sock_path, int type, int mask)
{
struct sockaddr_un addr;
int old_mask;
if ((sock == NULL) || (sock_path == NULL)) {
dlt_log(LOG_ERR, "dlt_daemon_unix_socket_open: arguments invalid");
return -1;
}
#ifdef DLT_SYSTEM_SOCKET_ACTIVATION_ENABLE
char **names = NULL;
const int num_fds = sd_listen_fds_with_names(0, &names);
bool sd_socket_open = false;
int i;
if (num_fds <= 0) {
dlt_vlog(LOG_WARNING, "unix socket: no sockets configured via systemd, error: %s\n", strerror(errno));
} else {
for (i = 0; i < num_fds; ++i) {
if (strcmp(sock_path, names[i]) != 0) {
continue;
}
if (sd_is_socket_unix(i + SD_LISTEN_FDS_START, type, 1, names[i], strlen(names[i])) < 0) {
dlt_vlog(LOG_WARNING,
"unix socket: socket with matching name is not of correct type or not in listen mode, error: %s\n",
strerror(errno));
continue;
}
*sock = i + SD_LISTEN_FDS_START;
sd_socket_open = true;
dlt_vlog(LOG_INFO, "unix socket: sock_path %s found systemd socket %s\n", sock_path, names[i]);
break;
}
/*
* The caller [of sd_listen_fds_with_names] needs to free the array
* itself and each of its elements with libc's free() call after use.
* */
for (i = 0; i < num_fds; ++i) {
free(names[i]);
}
free(names);
}
if (!sd_socket_open) {
dlt_vlog(LOG_INFO, "unix socket: sock_path %s no systemd socket found\n", sock_path);
#endif
if ((*sock = socket(AF_UNIX, type, 0)) == -1) {
dlt_log(LOG_WARNING, "unix socket: socket() error");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
memcpy(addr.sun_path, sock_path, sizeof(addr.sun_path));
unlink(sock_path);
/* set appropriate access permissions */
old_mask = umask(mask);
if (bind(*sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
dlt_log(LOG_WARNING, "unix socket: bind() error");
return -1;
}
if (listen(*sock, 1) == -1) {
dlt_log(LOG_WARNING, "unix socket: listen error");
return -1;
}
/* restore permissions */
umask(old_mask);
#ifdef DLT_SYSTEM_SOCKET_ACTIVATION_ENABLE
} // end of: if (!sd_socket_open) {
#endif
return 0;
}
int dlt_daemon_unix_socket_close(int sock)
{
int ret = close(sock);
if (ret != 0) {
dlt_vlog(LOG_WARNING, "unix socket close failed: %s", strerror(errno));
}
return ret;
}
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