source: mainline/uspace/lib/net/nil/nil_skel.c@ 6b82009

/*
 * Copyright (c) 2011 Martin Decky
 * 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 libnet
 * @{
 */

/** @file
 * Network interface layer module skeleton implementation.
 * @see nil_skel.h
 */

#include <bool.h>
#include <errno.h>
#include <ns.h>
#include <nil_skel.h>
#include <net_interface.h>
#include <net/modules.h>

/** Default thread for new connections.
 *
 * @param[in] iid   The initial message identifier.
 * @param[in] icall The initial message call structure.
 *
 */
static void nil_client_connection(ipc_callid_t iid, ipc_call_t *icall,
    void *arg)
{
        /*
         * Accept the connection by answering
         * the initial IPC_M_CONNECT_ME_TO call.
         */
        async_answer_0(iid, EOK);
        
        while (true) {
                ipc_call_t answer;
                size_t count;
                
                /* Clear the answer structure */
                refresh_answer(&answer, &count);
                
                /* Fetch the next message */
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);
                
                /* Process the message */
                int res = nil_module_message(callid, &call, &answer,
                    &count);
                
                /*
                 * End if told to either by the message or the processing
                 * result.
                 */
                if ((!IPC_GET_IMETHOD(call)) || (res == EHANGUP))
                        return;
                
                /* Answer the message */
                answer_call(callid, res, &answer, count);
        }
}

/** Start the network interface layer module.
 *
 * Initialize the client connection serving function, initialize
 * the module, register the module service and start the async
 * manager, processing IPC messages in an infinite loop.
 *
 * @param[in] service Service identification.
 *
 * @return EOK on success.
 * @return Other error codes as defined for the pm_init() function.
 * @return Other error codes as defined for the nil_initialize()
 *         function.
 *
 */
int nil_module_start(sysarg_t service)
{
        async_set_client_connection(nil_client_connection);
        async_sess_t *sess = net_connect_module();
        if (!sess)
                return ENOENT;
        
        int rc = pm_init();
        if (rc != EOK)
                return rc;
        
        rc = nil_initialize(sess);
        if (rc != EOK)
                goto out;
        
        rc = service_register(service);
        if (rc != EOK)
                goto out;
        
        async_manager();
        
out:
        pm_destroy();
        return rc;
}

/** @}
 */