source: mainline/uspace/lib/c/generic/inetcfg.c@ 0e94b979

/*
 * Copyright (c) 2012 Jiri Svoboda
 * 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 <assert.h>
#include <errno.h>
#include <inet/inetcfg.h>
#include <ipc/inet.h>
#include <ipc/services.h>
#include <loc.h>
#include <stdlib.h>
#include <str.h>

static async_sess_t *inetcfg_sess = NULL;

static int inetcfg_get_ids_once(sysarg_t method, sysarg_t arg1,
    sysarg_t *id_buf, size_t buf_size, size_t *act_size)
{
        async_exch_t *exch = async_exchange_begin(inetcfg_sess);

        ipc_call_t answer;
        aid_t req = async_send_1(exch, method, arg1, &answer);
        int rc = async_data_read_start(exch, id_buf, buf_size);

        async_exchange_end(exch);

        if (rc != EOK) {
                async_wait_for(req, NULL);
                return rc;
        }

        sysarg_t retval;
        async_wait_for(req, &retval);

        if (retval != EOK) {
                return retval;
        }

        *act_size = IPC_GET_ARG1(answer);
        return EOK;
}

/** Get list of IDs.
 *
 * Returns an allocated array of service IDs.
 *
 * @param method        IPC method
 * @param arg1          IPC argument 1
 * @param data          Place to store pointer to array of IDs
 * @param count         Place to store number of IDs
 * @return              EOK on success or negative error code
 */
static int inetcfg_get_ids_internal(sysarg_t method, sysarg_t arg1,
    sysarg_t **data, size_t *count)
{
        *data = NULL;
        *count = 0;

        size_t act_size = 0;
        int rc = inetcfg_get_ids_once(method, arg1, NULL, 0,
            &act_size);
        if (rc != EOK)
                return rc;

        size_t alloc_size = act_size;
        service_id_t *ids = malloc(alloc_size);
        if (ids == NULL)
                return ENOMEM;

        while (true) {
                rc = inetcfg_get_ids_once(method, arg1, ids, alloc_size,
                    &act_size);
                if (rc != EOK)
                        return rc;

                if (act_size <= alloc_size)
                        break;

                alloc_size = act_size;
                ids = realloc(ids, alloc_size);
                if (ids == NULL)
                        return ENOMEM;
        }

        *count = act_size / sizeof(sysarg_t);
        *data = ids;
        return EOK;
}

int inetcfg_init(void)
{
        service_id_t inet_svc;
        int rc;

        assert(inetcfg_sess == NULL);

        rc = loc_service_get_id(SERVICE_NAME_INETCFG, &inet_svc,
            IPC_FLAG_BLOCKING);
        if (rc != EOK)
                return ENOENT;

        inetcfg_sess = loc_service_connect(EXCHANGE_SERIALIZE, inet_svc,
            IPC_FLAG_BLOCKING);
        if (inetcfg_sess == NULL)
                return ENOENT;

        return EOK;
}

int inetcfg_addr_create_static(const char *name, inet_naddr_t *naddr,
    sysarg_t link_id, sysarg_t *addr_id)
{
        async_exch_t *exch = async_exchange_begin(inetcfg_sess);

        int rc = async_req_3_1(exch, INETCFG_ADDR_CREATE_STATIC, naddr->ipv4,
            naddr->bits, link_id, addr_id);
        async_exchange_end(exch);

        return rc;
}

int inetcfg_addr_delete(sysarg_t addr_id)
{
        async_exch_t *exch = async_exchange_begin(inetcfg_sess);

        int rc = async_req_1_0(exch, INETCFG_ADDR_DELETE, addr_id);
        async_exchange_end(exch);

        return rc;
}

int inetcfg_addr_get(sysarg_t addr_id, inet_addr_info_t *ainfo)
{
        ipc_call_t dreply;
        sysarg_t dretval;
        size_t act_size;
        char name_buf[LOC_NAME_MAXLEN + 1];

        async_exch_t *exch = async_exchange_begin(inetcfg_sess);

        ipc_call_t answer;
        aid_t req = async_send_1(exch, INETCFG_ADDR_GET, addr_id, &answer);
        aid_t dreq = async_data_read(exch, name_buf, LOC_NAME_MAXLEN, &dreply);
        async_wait_for(dreq, &dretval);

        async_exchange_end(exch);

        if (dretval != EOK) {
                async_wait_for(req, NULL);
                return dretval;
        }

        sysarg_t retval;
        async_wait_for(req, &retval);

        if (retval != EOK)
                return retval;

        act_size = IPC_GET_ARG2(dreply);
        assert(act_size <= LOC_NAME_MAXLEN);
        name_buf[act_size] = '\0';

        ainfo->naddr.ipv4 = IPC_GET_ARG1(answer);
        ainfo->naddr.bits = IPC_GET_ARG2(answer);
        ainfo->ilink = IPC_GET_ARG3(answer);
        ainfo->name = str_dup(name_buf);

        return EOK;
}

int inetcfg_get_addr_list(sysarg_t **addrs, size_t *count)
{
        return inetcfg_get_ids_internal(INETCFG_GET_ADDR_LIST,
            0, addrs, count);
}

int inetcfg_get_link_list(sysarg_t **links, size_t *count)
{
        return inetcfg_get_ids_internal(INETCFG_GET_LINK_LIST,
            0, links, count);
}

int inetcfg_link_get(sysarg_t link_id, inet_link_info_t *linfo)
{
        ipc_call_t dreply;
        sysarg_t dretval;
        size_t act_size;
        char name_buf[LOC_NAME_MAXLEN + 1];

        async_exch_t *exch = async_exchange_begin(inetcfg_sess);

        ipc_call_t answer;
        aid_t req = async_send_1(exch, INETCFG_LINK_GET, link_id, &answer);
        aid_t dreq = async_data_read(exch, name_buf, LOC_NAME_MAXLEN, &dreply);
        async_wait_for(dreq, &dretval);

        async_exchange_end(exch);

        if (dretval != EOK) {
                async_wait_for(req, NULL);
                return dretval;
        }

        sysarg_t retval;
        async_wait_for(req, &retval);

        if (retval != EOK)
                return retval;

        act_size = IPC_GET_ARG2(dreply);
        assert(act_size <= LOC_NAME_MAXLEN);
        name_buf[act_size] = '\0';

        linfo->name = str_dup(name_buf);

        return EOK;
}

/** @}
 */