source: mainline/uspace/srv/net/netif/netif.c@ aadf01e

/*
 * Copyright (c) 2009 Lukas Mejdrech
 * 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 netif
 *  @{
 */

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

#include <async.h>
#include <mem.h>
#include <fibril_synch.h>
#include <stdio.h>

#include <ipc/ipc.h>
#include <ipc/services.h>

#include "../err.h"
#include "../messages.h"
#include "../modules.h"

#include "../structures/packet/packet.h"
#include "../structures/packet/packet_client.h"
#include "../structures/measured_strings.h"

#include "../include/device.h"
#include "../include/netif_interface.h"
#include "../include/nil_interface.h"

#include "netif.h"
#include "netif_messages.h"
#include "netif_module.h"

/** Network interface module global data.
 */
extern netif_globals_t netif_globals;

DEVICE_MAP_IMPLEMENT(device_map, device_t)

/** @name Message processing functions
 */
/*@{*/

/** Registers the device notification receiver, the network interface layer module.
 *  @param[in] device_id The device identifier.
 *  @param[in] phone The network interface layer module phone.
 *  @returns EOK on success.
 *  @returns ENOENT if there is no such device.
 *  @returns ELIMIT if there is another module registered.
 */
int register_message(device_id_t device_id, int phone);

/*@}*/

int netif_probe_req(int netif_phone, device_id_t device_id, int irq, int io){
        int result;

        fibril_rwlock_write_lock(&netif_globals.lock);
        result = netif_probe_message(device_id, irq, io);
        fibril_rwlock_write_unlock(&netif_globals.lock);
        return result;
}

int netif_send_msg(int netif_phone, device_id_t device_id, packet_t packet, services_t sender){
        int result;

        fibril_rwlock_write_lock(&netif_globals.lock);
        result = netif_send_message(device_id, packet, sender);
        fibril_rwlock_write_unlock(&netif_globals.lock);
        return result;
}

int netif_start_req(int netif_phone, device_id_t device_id){
        ERROR_DECLARE;

        device_ref device;
        int result;
        int phone;

        fibril_rwlock_write_lock(&netif_globals.lock);
        if(ERROR_OCCURRED(find_device(device_id, &device))){
                fibril_rwlock_write_unlock(&netif_globals.lock);
                return ERROR_CODE;
        }
        result = netif_start_message(device);
        if(result > NETIF_NULL){
                phone = device->nil_phone;
                fibril_rwlock_write_unlock(&netif_globals.lock);
                nil_device_state_msg(phone, device_id, result);
                return EOK;
        }else{
                fibril_rwlock_write_unlock(&netif_globals.lock);
        }
        return result;
}

int netif_stop_req(int netif_phone, device_id_t device_id){
        ERROR_DECLARE;

        device_ref device;
        int result;
        int phone;

        fibril_rwlock_write_lock(&netif_globals.lock);
        if(ERROR_OCCURRED(find_device(device_id, &device))){
                fibril_rwlock_write_unlock(&netif_globals.lock);
                return ERROR_CODE;
        }
        result = netif_stop_message(device);
        if(result > NETIF_NULL){
                phone = device->nil_phone;
                fibril_rwlock_write_unlock(&netif_globals.lock);
                nil_device_state_msg(phone, device_id, result);
                return EOK;
        }else{
                fibril_rwlock_write_unlock(&netif_globals.lock);
        }
        return result;
}

int netif_stats_req(int netif_phone, device_id_t device_id, device_stats_ref stats){
        int res;

        fibril_rwlock_read_lock(&netif_globals.lock);
        res = netif_get_device_stats(device_id, stats);
        fibril_rwlock_read_unlock(&netif_globals.lock);
        return res;
}

int netif_get_addr_req(int netif_phone, device_id_t device_id, measured_string_ref * address, char ** data){
        ERROR_DECLARE;

        measured_string_t translation;

        if(!(address && data)){
                return EBADMEM;
        }
        fibril_rwlock_read_lock(&netif_globals.lock);
        if(! ERROR_OCCURRED(netif_get_addr_message(device_id, &translation))){
                *address = measured_string_copy(&translation);
                ERROR_CODE = (*address) ? EOK : ENOMEM;
        }
        fibril_rwlock_read_unlock(&netif_globals.lock);
        *data = (** address).value;
        return ERROR_CODE;
}

int netif_bind_service(services_t service, device_id_t device_id, services_t me, async_client_conn_t receiver){
        return EOK;
}

int find_device(device_id_t device_id, device_ref * device){
        if(! device){
                return EBADMEM;
        }
        *device = device_map_find(&netif_globals.device_map, device_id);
        if(! * device){
                return ENOENT;
        }
        if((** device).state == NETIF_NULL) return EPERM;
        return EOK;
}

void null_device_stats(device_stats_ref stats){
        bzero(stats, sizeof(device_stats_t));
}

int register_message(device_id_t device_id, int phone){
        ERROR_DECLARE;

        device_ref device;

        ERROR_PROPAGATE(find_device(device_id, &device));
        if(device->nil_phone > 0){
                return ELIMIT;
        }
        device->nil_phone = phone;
        printf("New receiver of the device %d registered:\n\tphone\t= %d\n", device->device_id, device->nil_phone);
        return EOK;
}

int netif_message(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count){
        ERROR_DECLARE;

        size_t length;
        device_stats_t stats;
        packet_t packet;
        measured_string_t address;

//      printf("message %d - %d\n", IPC_GET_METHOD(*call), NET_NETIF_FIRST);
        *answer_count = 0;
        switch(IPC_GET_METHOD(*call)){
                case IPC_M_PHONE_HUNGUP:
                        return EOK;
                case NET_NETIF_PROBE:
                        return netif_probe_req(0, IPC_GET_DEVICE(call), NETIF_GET_IRQ(call), NETIF_GET_IO(call));
                case IPC_M_CONNECT_TO_ME:
                        fibril_rwlock_write_lock(&netif_globals.lock);
                        ERROR_CODE = register_message(IPC_GET_DEVICE(call), IPC_GET_PHONE(call));
                        fibril_rwlock_write_unlock(&netif_globals.lock);
                        return ERROR_CODE;
                case NET_NETIF_SEND:
                        ERROR_PROPAGATE(packet_translate(netif_globals.net_phone, &packet, IPC_GET_PACKET(call)));
                        return netif_send_msg(0, IPC_GET_DEVICE(call), packet, IPC_GET_SENDER(call));
                case NET_NETIF_START:
                        return netif_start_req(0, IPC_GET_DEVICE(call));
                case NET_NETIF_STATS:
                        fibril_rwlock_read_lock(&netif_globals.lock);
                        if(! ERROR_OCCURRED(async_data_read_receive(&callid, &length))){
                                if(length < sizeof(device_stats_t)){
                                        ERROR_CODE = EOVERFLOW;
                                }else{
                                        if(! ERROR_OCCURRED(netif_get_device_stats(IPC_GET_DEVICE(call), &stats))){
                                                ERROR_CODE = async_data_read_finalize(callid, &stats, sizeof(device_stats_t));
                                        }
                                }
                        }
                        fibril_rwlock_read_unlock(&netif_globals.lock);
                        return ERROR_CODE;
                case NET_NETIF_STOP:
                        return netif_stop_req(0, IPC_GET_DEVICE(call));
                case NET_NETIF_GET_ADDR:
                        fibril_rwlock_read_lock(&netif_globals.lock);
                        if(! ERROR_OCCURRED(netif_get_addr_message(IPC_GET_DEVICE(call), &address))){
                                ERROR_CODE = measured_strings_reply(&address, 1);
                        }
                        fibril_rwlock_read_unlock(&netif_globals.lock);
                        return ERROR_CODE;
        }
        return netif_specific_message(callid, call, answer, answer_count);
}

int netif_init_module(async_client_conn_t client_connection){
        ERROR_DECLARE;

        async_set_client_connection(client_connection);
        netif_globals.net_phone = connect_to_service(SERVICE_NETWORKING);
        device_map_initialize(&netif_globals.device_map);
        ERROR_PROPAGATE(pm_init());
        fibril_rwlock_initialize(&netif_globals.lock);
        if(ERROR_OCCURRED(netif_initialize())){
                pm_destroy();
                return ERROR_CODE;
        }
        return EOK;
}

int netif_run_module(void){
        async_manager();

        pm_destroy();
        return EOK;
}

void netif_pq_release(packet_id_t packet_id){
        pq_release(netif_globals.net_phone, packet_id);
}

packet_t netif_packet_get_1(size_t content){
        return packet_get_1(netif_globals.net_phone, content);
}

/** @}
 */