Subversion Repositories HelenOS

/*

 * 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.

 */

/**

 * @file    ns.c

 * @brief   Naming service for HelenOS IPC.

 */

#include <ipc.h>

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <ns.h>

#include <errno.h>

#include <assert.h>

#include <libadt/list.h>

#include <libadt/hash_table.h>

#define NAME    "NS"

#define NS_HASH_TABLE_CHAINS    20

/* Static functions implementing NS hash table operations. */

static hash_index_t ns_hash(unsigned long *key);

static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item);

/** Operations for NS hash table. */

static hash_table_operations_t ns_hash_table_ops = {

    .hash = ns_hash,

    .compare = ns_compare,

    .remove_callback = NULL

};

/** NS hash table structure. */

static hash_table_t ns_hash_table;

/** NS hash table item. */

typedef struct {

    link_t link;

    ipcarg_t service;       /**< Number of the service. */

    ipcarg_t phone;         /**< Phone registered with the service. */

} hashed_service_t;

/*

irq_cmd_t msim_cmds[1] = {

    { CMD_MEM_READ_1, (void *)0xB0000000, 0 }

};

irq_code_t msim_kbd = {

    1,

    msim_cmds

};

*/

/*

irq_cmd_t i8042_cmds[1] = {

    { CMD_PORT_READ_1, (void *)0x60, 0 }

};

irq_code_t i8042_kbd = {

    1,

    i8042_cmds

};

*/

int static ping_phone;

int main(int argc, char **argv)

{

    ipc_call_t call;

    ipc_callid_t callid;

    char *as;

    ipcarg_t retval, arg1, arg2;

    printf("%s: Name service started.\n", NAME);

    if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 1, &ns_hash_table_ops)) {

        printf("%s: cannot create hash table\n", NAME);

        return ENOMEM;

    }

//  ipc_register_irq(2, &msim_kbd);

//  ipc_register_irq(1, &i8042_kbd);

    while (1) {

        callid = ipc_wait_for_call(&call, 0);

        printf("NS: Call phone=%lX...", call.phoneid);

        switch (IPC_GET_METHOD(call)) {

        case IPC_M_AS_SEND:

            as = (char *)IPC_GET_ARG2(call);

            printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call));

            retval = ipc_answer(callid, 0,(sysarg_t)(1024*1024), 0);

            if (!retval) {

                printf("Reading shared memory...");

                printf("Text: %s", as);

            } else

                printf("Failed answer: %d\n", retval);

            continue;

            break;

        case IPC_M_INTERRUPT:

            printf("GOT INTERRUPT: %c\n", IPC_GET_ARG2(call));

            break;

        case IPC_M_PHONE_HUNGUP:

            printf("Phone hung up.\n");

            retval = 0;

            break;

        case IPC_M_CONNECT_TO_ME:;

            /*

             * Request for registration of a service.

             */

            ipcarg_t service;

            ipcarg_t phone;

            hashed_service_t *hs;

            service = IPC_GET_ARG1(call);

            phone = IPC_GET_ARG3(call);

            printf("Registering service %d on phone %d...", service, phone);

            hs = (hashed_service_t *) malloc(sizeof(hashed_service_t));

            if (!hs) {

                printf("Failed to register service %d.\n", service);

            }

            link_initialize(&hs->link);

            hs->service = service;

            hs->phone = phone;

            hash_table_insert(&ns_hash_table, (unsigned long *) &service, &hs->link);

            ping_phone = phone;

            retval = 0;

            break;

        case IPC_M_CONNECT_ME_TO:

            printf("Connectme(%P)to: %zd\n",

                   IPC_GET_ARG3(call), IPC_GET_ARG1(call));

            retval = 0;

            break;

        case NS_PING:

            printf("Ping...%P %P\n", IPC_GET_ARG1(call),

                   IPC_GET_ARG2(call));

            retval = 0;

            arg1 = 0xdead;

            arg2 = 0xbeef;

            break;

        case NS_HANGUP:

            printf("Closing connection.\n");

            retval = EHANGUP;

            break;

        case NS_PING_SVC:

            printf("NS:Pinging service %d\n", ping_phone);

            ipc_call_sync(ping_phone, NS_PING, 0xbeef, 0);

            printf("NS:Got pong\n");

            break;

        default:

            printf("Unknown method: %zd\n", IPC_GET_METHOD(call));

            retval = ENOENT;

            break;

        }

        if (! (callid & IPC_CALLID_NOTIFICATION)) {

            printf("Answering.\n");

            ipc_answer(callid, retval, arg1, arg2);

        }

    }

}

/** Compute hash index into NS hash table.

 *

 * @param key Pointer to single key (i.e. service number).

 * @return Hash index corresponding to *key.

 */

hash_index_t ns_hash(unsigned long *key)

{

    assert(key);

    return *key % NS_HASH_TABLE_CHAINS;

}

/** Compare a key with hashed item.

 *

 * @param key Single key pointer.

 * @param keys Must be 1.

 * @param item Pointer to a hash table item.

 * @return Non-zero if the key matches the item, zero otherwise.

 */

int ns_compare(unsigned long *key, hash_count_t keys, link_t *item)

{

    hashed_service_t *hs;

    assert(key);

    assert(keys == 1);

    assert(item);

    hs = hash_table_get_instance(item, hashed_service_t, link);

    return *key == hs->service;

}