source: mainline/uspace/srv/ns/ns.c@ 228e490

/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * 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 <ipc/ipc.h>
#include <ipc/services.h>
#include <ipc/ns.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <as.h>
#include <ddi.h>
#include <event.h>
#include <macros.h>
#include <sysinfo.h>
#include "ns.h"
#include "service.h"
#include "clonable.h"
#include "task.h"

static void *clockaddr = NULL;
static void *klogaddr = NULL;

static void get_as_area(ipc_callid_t callid, ipc_call_t *call, void *faddr,
    size_t pages, void **addr)
{
        if ((faddr == NULL) || (pages == 0)) {
                ipc_answer_0(callid, ENOENT);
                return;
        }
        
        if (*addr == NULL) {
                *addr = as_get_mappable_page(pages * PAGE_SIZE);
                
                if (*addr == NULL) {
                        ipc_answer_0(callid, ENOENT);
                        return;
                }
                
                if (physmem_map(faddr, *addr, pages,
                    AS_AREA_READ | AS_AREA_CACHEABLE) != 0) {
                        ipc_answer_0(callid, ENOENT);
                        return;
                }
        }
        
        ipc_answer_2(callid, EOK, (sysarg_t) *addr, AS_AREA_READ);
}

static void setup_clock_area(ipc_callid_t callid, ipc_call_t *call, void **addr)
{
        uintptr_t faddr;
        int err = sysinfo_get_value("clock.faddr", &faddr);
        
        if (err != EOK)
                ipc_answer_0(callid, err);
        
        get_as_area(callid, call, (void *) faddr, 1, addr);
}

static void setup_klog_area(ipc_callid_t callid, ipc_call_t *call, void **addr)
{
        uintptr_t faddr;
        int err = sysinfo_get_value("klog.faddr", &faddr);
        
        if (err != EOK)
                ipc_answer_0(callid, err);
        
        size_t pages;
        err = sysinfo_get_value("klog.pages", &pages);
        
        if (err != EOK)
                ipc_answer_0(callid, err);
        
        get_as_area(callid, call, (void *) faddr, pages, addr);
}

int main(int argc, char **argv)
{
        printf(NAME ": HelenOS IPC Naming Service\n");
        
        int rc = service_init();
        if (rc != EOK)
                return rc;
        
        rc = clonable_init();
        if (rc != EOK)
                return rc;
        
        rc = task_init();
        if (rc != EOK)
                return rc;
        
        printf("%s: Accepting connections\n", NAME);
        
        while (true) {
                process_pending_conn();
                process_pending_wait();
                
                ipc_call_t call;
                ipc_callid_t callid = ipc_wait_for_call(&call);
                
                task_id_t id;
                sysarg_t retval;
                
                switch (IPC_GET_IMETHOD(call)) {
                case IPC_M_SHARE_IN:
                        switch (IPC_GET_ARG3(call)) {
                        case SERVICE_MEM_REALTIME:
                                setup_clock_area(callid, &call, &clockaddr);
                                break;
                        case SERVICE_MEM_KLOG:
                                setup_klog_area(callid, &call, &klogaddr);
                                break;
                        default:
                                ipc_answer_0(callid, ENOENT);
                        }
                        continue;
                case IPC_M_PHONE_HUNGUP:
                        retval = ns_task_disconnect(&call);
                        break;
                case IPC_M_CONNECT_TO_ME:
                        /*
                         * Server requests service registration.
                         */
                        if (service_clonable(IPC_GET_ARG1(call))) {
                                register_clonable(IPC_GET_ARG1(call),
                                    IPC_GET_ARG5(call), &call, callid);
                                continue;
                        } else {
                                retval = register_service(IPC_GET_ARG1(call),
                                    IPC_GET_ARG5(call), &call);
                        }
                        break;
                case IPC_M_CONNECT_ME_TO:
                        /*
                         * Client requests to be connected to a service.
                         */
                        if (service_clonable(IPC_GET_ARG1(call))) {
                                connect_to_clonable(IPC_GET_ARG1(call),
                                    &call, callid);
                                continue;
                        } else {
                                connect_to_service(IPC_GET_ARG1(call), &call,
                                    callid);
                                continue;
                        }
                        break;
                case NS_PING:
                        retval = EOK;
                        break;
                case NS_TASK_WAIT:
                        id = (task_id_t)
                            MERGE_LOUP32(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
                        wait_for_task(id, &call, callid);
                        continue;
                case NS_ID_INTRO:
                        retval = ns_task_id_intro(&call);
                        break;
                case NS_RETVAL:
                        retval = ns_task_retval(&call);
                        break;
                default:
                        retval = ENOENT;
                        break;
                }
                
                if (!(callid & IPC_CALLID_NOTIFICATION))
                        ipc_answer_0(callid, retval);
        }
        
        /* Not reached */
        return 0;
}

/**
 * @}
 */