source: mainline/kernel/generic/src/ipc/ops/concttome.c@ 455241b

/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * Copyright (c) 2012 Jakub Jermar
 * 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.
 */

/** @addtogroup kernel_generic_ipc
 * @{
 */
/** @file
 */

#include <ipc/sysipc_ops.h>
#include <ipc/ipc.h>
#include <ipc/ipcrsc.h>
#include <abi/errno.h>
#include <arch.h>

static int request_process(call_t *call, answerbox_t *box)
{
        cap_phone_handle_t phandle = CAP_NIL;
        kobject_t *pobj = NULL;
        errno_t rc = phone_alloc(TASK, false, &phandle, &pobj);
        if (rc == EOK) {
                /*
                 * Set the sender-assigned label to the new phone.
                 */
                phone_from_kobject(pobj)->label = ipc_get_arg5(&call->data);
        }
        call->priv = (sysarg_t) pobj;
        ipc_set_arg5(&call->data, cap_handle_raw(phandle));
        return 0;
}

static errno_t answer_cleanup(call_t *answer, ipc_data_t *olddata)
{
        cap_phone_handle_t phandle = (cap_handle_t) ipc_get_arg5(olddata);
        kobject_t *pobj = (kobject_t *) answer->priv;

        if (cap_handle_valid(phandle)) {
                kobject_put(pobj);
                cap_free(TASK, phandle);
        }

        return EOK;
}

static errno_t answer_preprocess(call_t *answer, ipc_data_t *olddata)
{
        cap_phone_handle_t phandle = (cap_handle_t) ipc_get_arg5(olddata);
        kobject_t *pobj = (kobject_t *) answer->priv;

        if (ipc_get_retval(&answer->data) != EOK) {
                /* The connection was not accepted */
                answer_cleanup(answer, olddata);
        } else if (cap_handle_valid(phandle)) {
                /*
                 * The connection was accepted
                 */

                /*
                 * We need to create another reference as the one we have now
                 * will be consumed by ipc_phone_connect().
                 */
                kobject_add_ref(pobj);

                if (ipc_phone_connect(phone_from_kobject(pobj),
                    &answer->sender->answerbox)) {
                        /* Pass the reference to the capability */
                        cap_publish(TASK, phandle, pobj);
                } else {
                        /* The answerbox is shutting down. */
                        ipc_set_retval(&answer->data, ENOENT);
                        answer_cleanup(answer, olddata);
                }
        } else {
                ipc_set_retval(&answer->data, ELIMIT);
        }

        return EOK;
}

sysipc_ops_t ipc_m_connect_to_me_ops = {
        .request_preprocess = null_request_preprocess,
        .request_forget = null_request_forget,
        .request_process = request_process,
        .answer_cleanup = answer_cleanup,
        .answer_preprocess = answer_preprocess,
        .answer_process = null_answer_process,
};

/** @}
 */