source: mainline/uspace/srv/ns/ns.c@ 7dd7bc0

/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * Copyright (c) 2015 Michal Koutny
 * 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 ns
 * @{
 */

/**
 * @file  ns.c
 * @brief Naming service for HelenOS IPC.
 */

#include <abi/ipc/methods.h>
#include <async.h>
#include <ipc/ns.h>
#include <ipc/services.h>
#include <abi/ipc/interfaces.h>
#include <stdio.h>
#include <errno.h>
#include <ipc/taskman.h>
#include <taskman.h>
#include <task.h>

#include "ns.h"
#include "service.h"

static void ns_connection(ipc_call_t *icall, void *arg)
{
        ipc_call_t call;
        iface_t iface;
        service_t service;

        iface = ipc_get_arg1(icall);
        service = ipc_get_arg2(icall);
        if (service != 0) {
                /*
                 * Client requests to be connected to a service.
                 */
                ns_service_forward(service, iface, icall);
                return;
        }

        async_accept_0(icall);

        while (true) {
                ns_pending_conn_process();

                async_get_call(&call);
                if (!ipc_get_imethod(&call))
                        break;

                errno_t retval;
                service_t service;

                switch (ipc_get_imethod(&call)) {
                case NS_REGISTER:
                        service = ipc_get_arg1(&call);
                        iface = ipc_get_arg2(&call);

                        /*
                         * Server requests service registration.
                         */
                        retval = ns_service_register(service, iface);

                        break;
                case NS_REGISTER_BROKER:
                        service = ipc_get_arg1(&call);
                        retval = ns_service_register_broker(service);
                        break;
                case NS_PING:
                        retval = EOK;
                        break;
                default:
                        printf("%s: Method not supported (%" PRIun ")\n",
                            NAME, ipc_get_imethod(&call));
                        retval = ENOTSUP;
                        break;
                }

                async_answer_0(&call, retval);
        }

        /* TODO: Ignore so far, in future we might unregister services */
        //(void) ns_task_disconnect(&call);
        async_answer_0(&call, EOK);
}

int main(int argc, char **argv)
{
        printf("%s: HelenOS IPC Naming Service\n", NAME);

        errno_t rc = ns_service_init();
        if (rc != EOK)
                return rc;

        /** fallback port handler must be set before ns gets
         * introduced to taskman. Taskman will wait until
         * the introduction, then it will start forwarding
         * calls to ns.
         */
        async_set_fallback_port_handler(ns_connection, NULL);

        rc = taskman_intro_ns();
        if (rc != EOK) {
                printf("%s: not accepted by taskman (%i)\n", NAME, rc);
                return rc;
        }
        task_retval(0);

        printf("%s: Accepting connections\n", NAME);

        async_manager();

        /* Not reached */
        return 0;
}

/**
 * @}
 */