/*
* Copyright (c) 2023 Jiri Svoboda
* Copyright (c) 2009 Martin Decky
* All rights reserved.
*
* 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <async.h>
#include <errno.h>
#include <str_error.h>
#include <fibril_synch.h>
#include <ipc/services.h>
#include <ipc/clipboard.h>
#include <loc.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <task.h>
#define NAME "clipboard"
static char *clip_data = NULL;
static size_t clip_size = 0;
static clipboard_tag_t clip_tag = CLIPBOARD_TAG_NONE;
static FIBRIL_MUTEX_INITIALIZE(clip_mtx);
static service_id_t svc_id;
static void clip_put_data(ipc_call_t *req)
{
char *data;
errno_t rc;
size_t size;
switch (ipc_get_arg1(req)) {
case CLIPBOARD_TAG_NONE:
fibril_mutex_lock(&clip_mtx);
if (clip_data)
free(clip_data);
clip_data = NULL;
clip_size = 0;
clip_tag = CLIPBOARD_TAG_NONE;
fibril_mutex_unlock(&clip_mtx);
async_answer_0(req, EOK);
break;
case CLIPBOARD_TAG_DATA:
rc = async_data_write_accept((void **) &data, false, 0, 0, 0, &size);
if (rc != EOK) {
async_answer_0(req, rc);
break;
}
fibril_mutex_lock(&clip_mtx);
if (clip_data)
free(clip_data);
clip_data = data;
clip_size = size;
clip_tag = CLIPBOARD_TAG_DATA;
fibril_mutex_unlock(&clip_mtx);
async_answer_0(req, EOK);
break;
default:
async_answer_0(req, EINVAL);
}
}
static void clip_get_data(ipc_call_t *req)
{
fibril_mutex_lock(&clip_mtx);
ipc_call_t call;
size_t size;
/* Check for clipboard data tag compatibility */
switch (ipc_get_arg1(req)) {
case CLIPBOARD_TAG_DATA:
if (!async_data_read_receive(&call, &size)) {
async_answer_0(&call, EINVAL);
async_answer_0(req, EINVAL);
break;
}
if (clip_tag != CLIPBOARD_TAG_DATA) {
/* So far we only understand binary data */
async_answer_0(&call, EOVERFLOW);
async_answer_0(req, EOVERFLOW);
break;
}
if (clip_size != size) {
/* The client expects different size of data */
async_answer_0(&call, EOVERFLOW);
async_answer_0(req, EOVERFLOW);
break;
}
errno_t retval = async_data_read_finalize(&call, clip_data, size);
if (retval != EOK) {
async_answer_0(req, retval);
break;
}
async_answer_0(req, EOK);
break;
default:
/*
* Sorry, we don't know how to get unknown or NONE
* data from the clipbard
*/
async_answer_0(req, EINVAL);
break;
}
fibril_mutex_unlock(&clip_mtx);
}
static void clip_content(ipc_call_t *req)
{
fibril_mutex_lock(&clip_mtx);
size_t size = clip_size;
clipboard_tag_t tag = clip_tag;
fibril_mutex_unlock(&clip_mtx);
async_answer_2(req, EOK, (sysarg_t) size, (sysarg_t) tag);
}
static void clip_connection(ipc_call_t *icall, void *arg)
{
/* Accept connection */
async_accept_0(icall);
while (true) {
ipc_call_t call;
async_get_call(&call);
if (!ipc_get_imethod(&call)) {
async_answer_0(&call, EOK);
break;
}
switch (ipc_get_imethod(&call)) {
case CLIPBOARD_PUT_DATA:
clip_put_data(&call);
break;
case CLIPBOARD_GET_DATA:
clip_get_data(&call);
break;
case CLIPBOARD_CONTENT:
clip_content(&call);
break;
default:
async_answer_0(&call, ENOENT);
}
}
}
int main(int argc, char *argv[])
{
errno_t rc;
loc_srv_t *srv;
printf("%s: HelenOS clipboard service\n", NAME);
async_set_fallback_port_handler(clip_connection, NULL);
rc = loc_server_register(NAME, &srv);
if (rc != EOK) {
printf("%s: Failed registering server: %s\n", NAME, str_error(rc));
return rc;
}
rc = loc_service_register(srv, SERVICE_NAME_CLIPBOARD, &svc_id);
if (rc != EOK) {
loc_server_unregister(srv);
printf("%s: Failed registering service : %s\n", NAME, str_error(rc));
return rc;
}
printf("%s: Accepting connections\n", NAME);
task_retval(0);
async_manager();
/* Never reached */
return 0;
}