WebSVN – HelenOS – Diff – /branches/network/uspace/srv/net/tl/udp/udp.c


/*
 * Copyright (c) 2008 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 udp
 *  @{
 */
 
/** @file
 *  UDP module implementation.
 *  @see udp.h
 */
 
#include <async.h>
#include <fibril_sync.h>
#include <malloc.h>
 
#include <ipc/ipc.h>
#include <ipc/services.h>
 
#include "../../err.h"
#include "../../messages.h"
#include "../../modules.h"
 
#include "../../structures/dynamic_fifo.h"
#include "../../structures/packet/packet_client.h"
 
#include "../../include/crc.h"
#include "../../include/in.h"
#include "../../include/in6.h"
#include "../../include/inet.h"
#include "../../include/ip_client.h"
#include "../../include/ip_interface.h"
#include "../../include/ip_protocols.h"
#include "../../include/icmp_client.h"
#include "../../include/icmp_interface.h"
#include "../../include/net_interface.h"
#include "../../include/socket_codes.h"
#include "../../include/socket_errno.h"
 
#include "../../socket/socket_core.h"
#include "../../socket/socket_messages.h"
 
#include "../tl_common.h"
#include "../tl_messages.h"
 
#include "udp.h"
#include "udp_header.h"
#include "udp_module.h"
 
/** Default UDP checksum computing.
 */
#define NET_DEFAULT_UDP_CHECKSUM_COMPUTING  true
 
/** Default UDP autobind when sending via unbound sockets.
 */
#define NET_DEFAULT_UDP_AUTOBINDING true
 
/** Maximum UDP fragment size.
 */
#define MAX_UDP_FRAGMENT_SIZE   65535
 
/** Free ports pool start.
 */
#define UDP_FREE_PORTS_START    1025
 
/** Free ports pool end.
 */
#define UDP_FREE_PORTS_END      65535
 
/** Processes the received UDP packet queue.
 *  Is used as an entry point from the underlying IP module.
 *  Locks the global lock and calls udp_process_packet() function.
 *  @param device_id The device identifier. Ignored parameter.
 *  @param packet The received packet queue. Input/output parameter.
 *  @param receiver The target service. Ignored parameter.
 *  @param error The packet error reporting service. Prefixes the received packet. Input parameter.
 *  @returns EOK on success.
 *  @returns Other error codes as defined for the udp_process_packet() function.
 */
int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error );
 
/** Processes the received UDP packet queue.
 *  Notifies the destination socket application.
 *  Releases the packet on error or sends an ICMP error notification..
 *  @param packet The received packet queue. Input/output parameter.
 *  @param error The packet error reporting service. Prefixes the received packet. Input parameter.
 *  @returns EOK on success.
 *  @returns EINVAL if the packet is not valid.
 *  @returns EINVAL if the stored packet address is not the an_addr_t.
 *  @returns EINVAL if the packet does not contain any data.
 *  @returns NO_DATA if the packet content is shorter than the user datagram header.
 *  @returns ENOMEM if there is not enough memory left.
 *  @returns EADDRNOTAVAIL if the destination socket does not exist.
 *  @returns Other error codes as defined for the ip_client_process_packet() function.
 */
int udp_process_packet( packet_t packet, services_t error );
 
/** Releases the packet and returns the result.
 *  @param packet The packet queue to be released. Input parameter.
 *  @param result The result to be returned. Input parameter.
 *  @return The result parameter.
 */
int udp_release_and_return( packet_t packet, int result );
 
/** @name Socket messages processing functions
 */
/*@{*/
 
/** Processes the socket client messages.
 *  Runs until the client module disconnects.
 *  @param callid The message identifier. Input parameter.
 *  @param call The message parameters. Input parameter.
 *  @returns EOK on success.
 *  @see socket.h
 */
int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call );
 
/** Sends data from the socket to the remote address.
 *  Binds the socket to a free port if not already connected/bound.
 *  Handles the NET_SOCKET_SENDTO message.
 *  Supports AF_INET and AF_INET6 address families.
 *  @param local_sockets The application local sockets. Input/output parameter.
 *  @param socket_id Socket identifier. Input parameter.
 *  @param addr The destination address. Input parameter.
 *  @param addrlen The address length. Input parameter.
 *  @param fragments The number of data fragments. Input parameter.
 *  @param data_fragment_size The data fragment size in bytes. Input parameter.
 *  @param flags Various send flags. Input parameter.
 *  @returns EOK on success.
 *  @returns EAFNOTSUPPORT if the address family is not supported.
 *  @returns ENOTSOCK if the socket is not found.
 *  @returns EINVAL if the address is invalid.
 *  @returns ENOTCONN if the sending socket is not and cannot be bound.
 *  @returns ENOMEM if there is not enough memory left.
 *  @returns Other error codes as defined for the socket_read_packet_data() function.
 *  @returns Other error codes as defined for the ip_client_prepare_packet() function.
 *  @returns Other error codes as defined for the ip_send_msg() function.
 */
int udp_sendto_message( socket_cores_ref local_sockets, int socket_id, const struct sockaddr * addr, socklen_t addrlen, int fragments, size_t data_fragment_size, int flags );
 
/** Receives data to the socket.
 *  Handles the NET_SOCKET_RECVFROM message.
 *  Replies the source address as well.
 *  @param local_sockets The application local sockets. Input parameter.
 *  @param socket_id Socket identifier. Input parameter.
 *  @param flags Various receive flags. Input parameter.
 *  @param addrlen The source address length. Output parameter.
 *  @returns The number of bytes received.
 *  @returns ENOTSOCK if the socket is not found.
 *  @returns NO_DATA if there are no received packets or data.
 *  @returns ENOMEM if there is not enough memory left.
 *  @returns EINVAL if the received address is not an IP address.
 *  @returns Other error codes as defined for the packet_translate() function.
 *  @returns Other error codes as defined for the data_reply() function.
 */
int udp_recvfrom_message( socket_cores_ref local_sockets, int socket_id, int flags, size_t * addrlen );
 
/*@}*/
 
/** UDP global data.
 */
udp_globals_t   udp_globals;
 
int udp_initialize( async_client_conn_t client_connection ){
    ERROR_DECLARE;
 
    measured_string_t   names[] = {{ "UDP_CHECKSUM_COMPUTING", 22 }, { "UDP_AUTOBINDING", 15 }};
    measured_string_ref configuration;
    size_t              count = sizeof( names ) / sizeof( measured_string_t );
    char *              data;
 
    fibril_rwlock_initialize( & udp_globals.lock );
    fibril_rwlock_write_lock( & udp_globals.lock );
    udp_globals.icmp_phone = icmp_connect_module( SERVICE_ICMP );
    if( udp_globals.icmp_phone < 0 ){
        return udp_globals.icmp_phone;
    }
    udp_globals.ip_phone = ip_bind_service( SERVICE_IP, IPPROTO_UDP, SERVICE_UDP, client_connection, udp_received_msg );
    if( udp_globals.ip_phone < 0 ){
        return udp_globals.ip_phone;
    }
    ERROR_PROPAGATE( ip_packet_size_req( udp_globals.ip_phone, -1, & udp_globals.packet_dimension.addr_len, & udp_globals.packet_dimension.prefix, & udp_globals.packet_dimension.content, & udp_globals.packet_dimension.suffix ));
    ERROR_PROPAGATE( socket_ports_initialize( & udp_globals.sockets ));
    udp_globals.packet_dimension.prefix += sizeof( udp_header_t );
    udp_globals.packet_dimension.content -= sizeof( udp_header_t );
    udp_globals.last_used_port = UDP_FREE_PORTS_START - 1;
    // get configuration
    udp_globals.checksum_computing = NET_DEFAULT_UDP_CHECKSUM_COMPUTING;
    udp_globals.autobinding = NET_DEFAULT_UDP_AUTOBINDING;
    configuration = & names[ 0 ];
    ERROR_PROPAGATE( net_get_conf_req( udp_globals.net_phone, & configuration, count, & data ));
    if( configuration ){
        if( configuration[ 0 ].value ){
            udp_globals.checksum_computing = ( configuration[ 0 ].value[ 0 ] == 'y' );
        }
        if( configuration[ 1 ].value ){
            udp_globals.autobinding = ( configuration[ 1 ].value[ 0 ] == 'y' );
        }
        net_free_settings( configuration, data );
    }
    fibril_rwlock_write_unlock( & udp_globals.lock );
    return EOK;
}
 
int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error ){
    int result;
 
    fibril_rwlock_read_lock( & udp_globals.lock );
    result = udp_process_packet( packet, error );
    fibril_rwlock_read_unlock( & udp_globals.lock );
 
    return result;
}
 
int udp_process_packet( packet_t packet, services_t error ){
    ERROR_DECLARE;
 
    size_t          length;
    size_t          offset;
    int             result;
 
    udp_header_ref  header;
    socket_core_ref *   socket;
    packet_t        next_packet;
    size_t          total_length;
    uint32_t        checksum;
    int             fragments;
    packet_t        tmp_packet;
    icmp_type_t     type;
    icmp_code_t     code;
    ip_pseudo_header_ref    ip_header;
    struct sockaddr *       src;
    struct sockaddr *       dest;
 
    if( error ){
        switch( error ){
            case SERVICE_ICMP:
                // ignore error
 
                // length = icmp_client_header_length( packet );
                // process error
                result = icmp_client_process_packet( packet, & type, & code, NULL, NULL );
                if( result < 0 ){
                    return udp_release_and_return( packet, result );
                }
 
                length = ( size_t ) result;
                if( ERROR_OCCURRED( packet_trim( packet, length, 0 ))){
                    return udp_release_and_return( packet, ERROR_CODE );
                }
                break;
            default:
                return udp_release_and_return( packet, ENOTSUP );
        }
    }
    // TODO process received ipopts?
    result = ip_client_process_packet( packet, NULL, NULL, NULL, NULL, NULL );
    if( result < 0 ){
        return udp_release_and_return( packet, result );
    }
    offset = ( size_t ) result;
 
    length = packet_get_data_length( packet );
    if( length <= 0 ){
        return udp_release_and_return( packet, EINVAL );
    }
    if( length < sizeof( udp_header_t ) + offset ){
        return udp_release_and_return( packet, NO_DATA );
    }
 
    // trim all but UDP header
    if( ERROR_OCCURRED( packet_trim( packet, offset, 0 ))){
        return udp_release_and_return( packet, ERROR_CODE );
    }
 
    // get udp header
    header = ( udp_header_ref ) packet_get_data( packet );
    if( ! header ){
        return udp_release_and_return( packet, NO_DATA );
    }
    // find the destination socket
    socket = socket_ports_find( & udp_globals.sockets, ntohs( header->destination_port ));
    if( ! socket ){
        if( tl_prepare_icmp_packet( udp_globals.net_phone, udp_globals.icmp_phone, packet, error ) == EOK ){
            icmp_destination_unreachable_msg( udp_globals.icmp_phone, ICMP_PORT_UNREACH, 0, packet );
        }
        return EADDRNOTAVAIL;
    }
 
 
 
 
    // count the received packet fragments
    next_packet = packet;
    fragments = 0;
    total_length = ntohs( header->total_length );
    // compute header checksum if set
    if( header->checksum && ( ! error )){
        result = packet_get_addr( packet, ( uint8_t ** ) & src, ( uint8_t ** ) & dest );
        if( result <= 0 ){
            return udp_release_and_return( packet, result );
        }
        if( ERROR_OCCURRED( ip_client_get_pseudo_header( IPPROTO_UDP, src, result, dest, result, total_length, & ip_header, & length ))){
            return udp_release_and_return( packet, ERROR_CODE );
        }else{
            checksum = compute_checksum( 0, ip_header, length );
            // the udp header checksum will be added with the first fragment later
            free( ip_header );
        }
    }else{
        header->checksum = 0;
        checksum = 0;
    }
 
    do{
        ++ fragments;
        length = packet_get_data_length( next_packet );
        if( length <= 0 ){
            return udp_release_and_return( packet, NO_DATA );
        }
        if( total_length < length ){
            if( ERROR_OCCURRED( packet_trim( next_packet, 0, length - total_length ))){
                return udp_release_and_return( packet, ERROR_CODE );
            }
            // add partial checksum if set
            if( header->checksum ){
                checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));
            }
            // relese the rest of the packet fragments
            tmp_packet = pq_next( next_packet );
            while( tmp_packet ){
                next_packet = pq_detach( tmp_packet );
                pq_release( udp_globals.net_phone, packet_get_id( tmp_packet ));
                tmp_packet = next_packet;
            }
            // exit the loop
            break;
        }
        total_length -= length;
        // add partial checksum if set
        if( header->checksum ){
            checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));
        }
    }while(( next_packet = pq_next( next_packet )) && ( total_length > 0 ));
 
    // check checksum
    if( header->checksum ){
        if( flip_checksum( compact_checksum( checksum ))){
            if( tl_prepare_icmp_packet( udp_globals.net_phone, udp_globals.icmp_phone, packet, error ) == EOK ){
                // checksum error ICMP
 
                icmp_parameter_problem_msg( udp_globals.icmp_phone, ICMP_PARAM_POINTER, (( size_t ) (( void * ) & header->checksum )) - (( size_t ) (( void * ) header )), packet );
            }
            return EINVAL;
        }
    }
 
    // queue the received packet
    if( ERROR_OCCURRED( dyn_fifo_push( &( ** socket ).received, packet_get_id( packet ), SOCKET_MAX_RECEIVED_SIZE ))){
        return udp_release_and_return( packet, ERROR_CODE );
    }
 
    // notify the destination socket
    async_msg_5(( ** socket ).phone, NET_SOCKET_RECEIVED, ( ipcarg_t ) ( ** socket ).socket_id, 0, 0, 0, ( ipcarg_t ) fragments );
    return EOK;
}
 
int udp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
    ERROR_DECLARE;
 
    packet_t    packet;
 
    * answer_count = 0;
    switch( IPC_GET_METHOD( * call )){
        case NET_TL_RECEIVED:
            if( ! ERROR_OCCURRED( packet_translate( udp_globals.net_phone, & packet, IPC_GET_PACKET( call )))){
                ERROR_CODE = udp_received_msg( IPC_GET_DEVICE( call ), packet, SERVICE_UDP, IPC_GET_ERROR( call ));
            }
            return ERROR_CODE;
        case IPC_M_CONNECT_TO_ME:
            return udp_process_client_messages( callid, * call );
    }
    return ENOTSUP;
}
 
int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call ){
    int                     res;
    bool                    keep_on_going = true;
    socket_cores_t          local_sockets;
    int                     app_phone = IPC_GET_PHONE( & call );
    struct sockaddr *       addr;
    size_t                  addrlen;
//  fibril_rwlock_t         lock;
    ipc_call_t              answer;
    int                     answer_count;
 
    /*
     * Accept the connection
     *  - Answer the first IPC_M_CONNECT_ME_TO call.
     */
    ipc_answer_0( callid, EOK );
 
    // The client connection is only in one fibril and therefore no additional locks are needed.
 
    socket_cores_initialize( & local_sockets );
//  fibril_rwlock_initialize( & lock );
 
    while( keep_on_going ){
        // refresh data
        refresh_answer( & answer, & answer_count );
 
        callid = async_get_call( & call );
//      printf( "message %d\n", IPC_GET_METHOD( * call ));
 
        switch( IPC_GET_METHOD( call )){
            case IPC_M_PHONE_HUNGUP:
                keep_on_going = false;
                res = EOK;
                break;
            case NET_SOCKET:
//              fibril_rwlock_write_lock( & lock );
                res = socket_create( & local_sockets, app_phone, NULL, SOCKET_SET_SOCKET_ID( answer ));
//              fibril_rwlock_write_unlock( & lock );
                // TODO max fragment size
                * SOCKET_SET_DATA_FRAGMENT_SIZE( answer ) = MAX_UDP_FRAGMENT_SIZE;
                * SOCKET_SET_HEADER_SIZE( answer ) = sizeof( udp_header_t );
                answer_count = 3;
                break;
            case NET_SOCKET_BIND:
                res = data_receive(( void ** ) & addr, & addrlen );
                if( res == EOK ){
//                  fibril_rwlock_write_lock( & lock );
                    fibril_rwlock_write_lock( & udp_globals.lock );
                    res = socket_bind( & local_sockets, & udp_globals.sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, UDP_FREE_PORTS_START, UDP_FREE_PORTS_END, udp_globals.last_used_port );
                    fibril_rwlock_write_unlock( & udp_globals.lock );
//                  fibril_rwlock_write_unlock( & lock );
                    free( addr );
                }
                break;
            case NET_SOCKET_SENDTO:
                res = data_receive(( void ** ) & addr, & addrlen );
                if( res == EOK ){
//                  fibril_rwlock_read_lock( & lock );
                    fibril_rwlock_read_lock( & udp_globals.lock );
                    res = udp_sendto_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, SOCKET_GET_DATA_FRAGMENTS( call ), SOCKET_GET_DATA_FRAGMENT_SIZE( call ), SOCKET_GET_FLAGS( call ));
                    fibril_rwlock_read_unlock( & udp_globals.lock );
//                  fibril_rwlock_read_unlock( & lock );
                    free( addr );
                }
                break;
            case NET_SOCKET_RECVFROM:
//              fibril_rwlock_read_lock( & lock );
                fibril_rwlock_read_lock( & udp_globals.lock );
                res = udp_recvfrom_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), SOCKET_GET_FLAGS( call ), & addrlen );
                fibril_rwlock_read_unlock( & udp_globals.lock );
//              fibril_rwlock_read_unlock( & lock );
                if( res > 0 ){
                    * SOCKET_SET_READ_DATA_LENGTH( answer ) = res;
                    * SOCKET_SET_ADDRESS_LENGTH( answer ) = addrlen;
                    answer_count = 2;
                    res = EOK;
                }
                break;
            case NET_SOCKET_CLOSE:
//              fibril_rwlock_write_lock( & lock );
                fibril_rwlock_write_lock( & udp_globals.lock );
                res = socket_destroy( udp_globals.net_phone, SOCKET_GET_SOCKET_ID( call ), & local_sockets, & udp_globals.sockets );
                fibril_rwlock_write_unlock( & udp_globals.lock );
//              fibril_rwlock_write_unlock( & lock );
                break;
            case NET_SOCKET_GETSOCKOPT:
            case NET_SOCKET_SETSOCKOPT:
            default:
                res = ENOTSUP;
                break;
        }
 
//      printf( "res = %d\n", res );
 
        answer_call( callid, res, & answer, answer_count );
    }
 
    // TODO call socket_destroy() on all bound!
    socket_cores_destroy( & local_sockets );
 
    return EOK;
}
 
int udp_sendto_message( socket_cores_ref local_sockets, int socket_id, const struct sockaddr * addr, socklen_t addrlen, int fragments, size_t data_fragment_size, int flags ){
    ERROR_DECLARE;
 
    socket_core_ref         socket;
    packet_t                packet;
    packet_t                next_packet;
    udp_header_ref          header;
    int                     index;
    size_t                  total_length;
    int                     result;
    uint16_t                dest_port;
    uint32_t                checksum;
    ip_pseudo_header_ref    ip_header;
    size_t                  headerlen;
    device_id_t             device_id;
 
    ERROR_PROPAGATE( tl_get_address_port( addr, addrlen, & dest_port ));
 
    socket = socket_cores_find( local_sockets, socket_id );
    if( ! socket ) return ENOTSOCK;
 
    if(( socket->port <= 0 ) && udp_globals.autobinding ){
        // bind the socket to a random free port if not bound
        do{
            // try to find a free port
            fibril_rwlock_read_unlock( & udp_globals.lock );
            fibril_rwlock_write_lock( & udp_globals.lock );
            // might be changed in the meantime
            if( socket->port <= 0 ){
                ERROR_PROPAGATE( socket_bind_free_port( & udp_globals.sockets, socket, UDP_FREE_PORTS_START, UDP_FREE_PORTS_END, udp_globals.last_used_port ));
                // set the next port as the search starting port number
                udp_globals.last_used_port = socket->port;
            }
            fibril_rwlock_write_unlock( & udp_globals.lock );
            fibril_rwlock_read_lock( & udp_globals.lock );
            // might be changed in the meantime
        }while( socket->port <= 0 );
    }
 
    // TODO do not ask all the time
    ERROR_PROPAGATE( ip_packet_size_req( udp_globals.ip_phone, -1, & udp_globals.packet_dimension.addr_len, & udp_globals.packet_dimension.prefix, & udp_globals.packet_dimension.content, & udp_globals.packet_dimension.suffix ));
 
    // read the first packet fragment
    result = tl_socket_read_packet_data( udp_globals.net_phone, & packet, sizeof( udp_header_t ), & udp_globals.packet_dimension, addr, addrlen );
    if( result < 0 ) return result;
    total_length = ( size_t ) result;
    if( udp_globals.checksum_computing ){
        checksum = compute_checksum( 0, packet_get_data( packet ), packet_get_data_length( packet ));
    }else{
        checksum = 0;
    }
    // prefix the udp header
    header = PACKET_PREFIX( packet, udp_header_t );
    if( ! header ){
        return udp_release_and_return( packet, ENOMEM );
    }
    bzero( header, sizeof( * header ));
    // read the rest of the packet fragments
    for( index = 1; index < fragments; ++ index ){
        result = tl_socket_read_packet_data( udp_globals.net_phone, & next_packet, 0, & udp_globals.packet_dimension, addr, addrlen );
        if( result < 0 ){
            return udp_release_and_return( packet, result );
        }
        packet = pq_add( packet, next_packet, index, 0 );
        total_length += ( size_t ) result;
        if( udp_globals.checksum_computing ){
            checksum = compute_checksum( checksum, packet_get_data( next_packet ), packet_get_data_length( next_packet ));
        }
    }
    // set the udp header
    header->source_port = htons(( socket->port > 0 ) ? socket->port : 0 );
    header->destination_port = htons( dest_port );
    header->total_length = htons( total_length + sizeof( * header ));
    header->checksum = 0;
    if( udp_globals.checksum_computing ){
        if( ERROR_OCCURRED( ip_get_route_req( udp_globals.ip_phone, IPPROTO_UDP, addr, addrlen, & device_id, & ip_header, & headerlen ))){
            return udp_release_and_return( packet, ERROR_CODE );
        }
        if( ERROR_OCCURRED( ip_client_set_pseudo_header_data_length( ip_header, headerlen, total_length + sizeof( udp_header_t )))){
            free( ip_header );
            return udp_release_and_return( packet, ERROR_CODE );
        }
 
 
 
 
        checksum = compute_checksum( checksum, ip_header, headerlen );
        checksum = compute_checksum( checksum, ( uint8_t * ) header, sizeof( * header ));
        header->checksum = htons( flip_checksum( compact_checksum( checksum )));
        free( ip_header );
    }else{
        device_id = -1;
    }
    // prepare the first packet fragment
    if( ERROR_OCCURRED( ip_client_prepare_packet( packet, IPPROTO_UDP, 0, 0, 0, 0 ))){
        return udp_release_and_return( packet, ERROR_CODE );
    }
    // send the packet
    return ip_send_msg( udp_globals.ip_phone, device_id, packet, SERVICE_UDP, 0 );
}
 
int udp_recvfrom_message( socket_cores_ref local_sockets, int socket_id, int flags, size_t * addrlen ){
    ERROR_DECLARE;
 
    socket_core_ref socket;
    int             packet_id;
    packet_t        packet;
    udp_header_ref  header;
    struct sockaddr *   addr;
    size_t          length;
    packet_t        next_packet;
    uint8_t *       data;
    size_t          fragments;
    size_t *        lengths;
    size_t          index;
    int             result;
 
    // find the socket
    socket = socket_cores_find( local_sockets, socket_id );
    if( ! socket ) return ENOTSOCK;
    // get the next received packet
    packet_id = dyn_fifo_value( & socket->received );
    if( packet_id < 0 ) return NO_DATA;
    ERROR_PROPAGATE( packet_translate( udp_globals.net_phone, & packet, packet_id ));
    // get udp header
    data = packet_get_data( packet );
    if( ! data ){
        pq_release( udp_globals.net_phone, packet_id );
        return NO_DATA;
    }
    header = ( udp_header_ref ) data;
 
    // set the source address port
    result = packet_get_addr( packet, ( uint8_t ** ) & addr, NULL );
    if( ERROR_OCCURRED( tl_set_address_port( addr, result, ntohs( header->source_port )))){
        pq_release( udp_globals.net_phone, packet_id );
        return ERROR_CODE;
    }
    * addrlen = ( size_t ) result;
    // send the source address
    ERROR_PROPAGATE( data_reply( addr, * addrlen ));
 
    next_packet = pq_next( packet );
    if( ! next_packet ){
        // write all if only one fragment
        ERROR_PROPAGATE( data_reply( data + sizeof( udp_header_t ), packet_get_data_length( packet ) - sizeof( udp_header_t )));
        // store the total length
        length = packet_get_data_length( packet ) - sizeof( udp_header_t );
    }else{
        // count the packet fragments
        fragments = 1;
        next_packet = pq_next( packet );
        while(( next_packet = pq_next( next_packet ))){
            ++ fragments;
        }
        // compute and store the fragment lengths
        lengths = ( size_t * ) malloc( sizeof( size_t ) * fragments + sizeof( size_t ));
        if( ! lengths ) return ENOMEM;
        lengths[ 0 ] = packet_get_data_length( packet ) - sizeof( udp_header_t );
        lengths[ fragments ] = lengths[ 0 ];
        next_packet = pq_next( packet );
        for( index = 1; index < fragments; ++ index ){
            lengths[ index ] = packet_get_data_length( next_packet );
            lengths[ fragments ] += lengths[ index ];
            next_packet = pq_next( packet );
        }while( next_packet );
        // write the fragment lengths
        ERROR_PROPAGATE( data_reply( lengths, sizeof( int ) * ( fragments + 1 )));
        // write the first fragment
        ERROR_PROPAGATE( data_reply( data + sizeof( udp_header_t ), lengths[ 0 ] ));
        next_packet = pq_next( packet );
        // write the rest of the fragments
        for( index = 1; index < fragments; ++ index ){
            ERROR_PROPAGATE( data_reply( packet_get_data( next_packet ), lengths[ index ] ));
            next_packet = pq_next( packet );
        }while( next_packet );
        // store the total length
        length = lengths[ fragments ];
        free( lengths );
    }
    // release the packet
    dyn_fifo_pop( & socket->received );
    pq_release( udp_globals.net_phone, packet_get_id( packet ));
    // return the total length
    return ( int ) length;
}
 
int udp_release_and_return( packet_t packet, int result ){
    pq_release( udp_globals.net_phone, packet_get_id( packet ));
    return result;
}
 
/** @}
 */
 

Rev 4730	Rev 4731
1	/*	1	/*
2	* Copyright (c) 2008 Lukas Mejdrech	2	* Copyright (c) 2008 Lukas Mejdrech
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup udp	29	/** @addtogroup udp
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/** @file	33	/** @file
34	* UDP module implementation.	34	* UDP module implementation.
35	* @see udp.h	35	* @see udp.h
36	*/	36	*/
37		37
38	#include <async.h>	38	#include <async.h>
39	#include <fibril_sync.h>	39	#include <fibril_sync.h>
40	#include <malloc.h>	40	#include <malloc.h>
41		41
42	#include <ipc/ipc.h>	42	#include <ipc/ipc.h>
43	#include <ipc/services.h>	43	#include <ipc/services.h>
44		44
45	#include "../../err.h"	45	#include "../../err.h"
46	#include "../../messages.h"	46	#include "../../messages.h"
47	#include "../../modules.h"	47	#include "../../modules.h"
48		48
49	#include "../../structures/dynamic_fifo.h"	49	#include "../../structures/dynamic_fifo.h"
50	#include "../../structures/packet/packet_client.h"	50	#include "../../structures/packet/packet_client.h"
51		51
52	#include "../../include/crc.h"	52	#include "../../include/crc.h"
53	#include "../../include/in.h"	53	#include "../../include/in.h"
54	#include "../../include/in6.h"	54	#include "../../include/in6.h"
55	#include "../../include/inet.h"	55	#include "../../include/inet.h"
56	#include "../../include/ip_client.h"	56	#include "../../include/ip_client.h"
57	#include "../../include/ip_interface.h"	57	#include "../../include/ip_interface.h"
58	#include "../../include/ip_protocols.h"	58	#include "../../include/ip_protocols.h"
59	#include "../../include/icmp_client.h"	59	#include "../../include/icmp_client.h"
60	#include "../../include/icmp_interface.h"	60	#include "../../include/icmp_interface.h"
61	#include "../../include/net_interface.h"	61	#include "../../include/net_interface.h"
62	#include "../../include/socket_codes.h"	62	#include "../../include/socket_codes.h"
63	#include "../../include/socket_errno.h"	63	#include "../../include/socket_errno.h"
64		64
65	#include "../../socket/socket_core.h"	65	#include "../../socket/socket_core.h"
66	#include "../../socket/socket_messages.h"	66	#include "../../socket/socket_messages.h"
67		67
68	#include "../tl_common.h"	68	#include "../tl_common.h"
69	#include "../tl_messages.h"	69	#include "../tl_messages.h"
70		70
71	#include "udp.h"	71	#include "udp.h"
72	#include "udp_header.h"	72	#include "udp_header.h"
73	#include "udp_module.h"	73	#include "udp_module.h"
74		74
75	/** Default UDP checksum computing.	75	/** Default UDP checksum computing.
76	*/	76	*/
77	#define NET_DEFAULT_UDP_CHECKSUM_COMPUTING true	77	#define NET_DEFAULT_UDP_CHECKSUM_COMPUTING true
78		78
79	/** Default UDP autobind when sending via unbound sockets.	79	/** Default UDP autobind when sending via unbound sockets.
80	*/	80	*/
81	#define NET_DEFAULT_UDP_AUTOBINDING true	81	#define NET_DEFAULT_UDP_AUTOBINDING true
82		82
83	/** Maximum UDP fragment size.	83	/** Maximum UDP fragment size.
84	*/	84	*/
85	#define MAX_UDP_FRAGMENT_SIZE 65535	85	#define MAX_UDP_FRAGMENT_SIZE 65535
86		86
87	/** Free ports pool start.	87	/** Free ports pool start.
88	*/	88	*/
89	#define UDP_FREE_PORTS_START 1025	89	#define UDP_FREE_PORTS_START 1025
90		90
91	/** Free ports pool end.	91	/** Free ports pool end.
92	*/	92	*/
93	#define UDP_FREE_PORTS_END 65535	93	#define UDP_FREE_PORTS_END 65535
94		94
95	/** Processes the received UDP packet queue.	95	/** Processes the received UDP packet queue.
96	* Is used as an entry point from the underlying IP module.	96	* Is used as an entry point from the underlying IP module.
97	* Locks the global lock and calls udp_process_packet() function.	97	* Locks the global lock and calls udp_process_packet() function.
98	* @param device_id The device identifier. Ignored parameter.	98	* @param device_id The device identifier. Ignored parameter.
99	* @param packet The received packet queue. Input/output parameter.	99	* @param packet The received packet queue. Input/output parameter.
100	* @param receiver The target service. Ignored parameter.	100	* @param receiver The target service. Ignored parameter.
101	* @param error The packet error reporting service. Prefixes the received packet. Input parameter.	101	* @param error The packet error reporting service. Prefixes the received packet. Input parameter.
102	* @returns EOK on success.	102	* @returns EOK on success.
103	* @returns Other error codes as defined for the udp_process_packet() function.	103	* @returns Other error codes as defined for the udp_process_packet() function.
104	*/	104	*/
105	int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error );	105	int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error );
106		106
107	/** Processes the received UDP packet queue.	107	/** Processes the received UDP packet queue.
108	* Notifies the destination socket application.	108	* Notifies the destination socket application.
109	* Releases the packet on error or sends an ICMP error notification..	109	* Releases the packet on error or sends an ICMP error notification..
110	* @param packet The received packet queue. Input/output parameter.	110	* @param packet The received packet queue. Input/output parameter.
111	* @param error The packet error reporting service. Prefixes the received packet. Input parameter.	111	* @param error The packet error reporting service. Prefixes the received packet. Input parameter.
112	* @returns EOK on success.	112	* @returns EOK on success.
113	* @returns EINVAL if the packet is not valid.	113	* @returns EINVAL if the packet is not valid.
114	* @returns EINVAL if the stored packet address is not the an_addr_t.	114	* @returns EINVAL if the stored packet address is not the an_addr_t.
115	* @returns EINVAL if the packet does not contain any data.	115	* @returns EINVAL if the packet does not contain any data.
116	* @returns NO_DATA if the packet content is shorter than the user datagram header.	116	* @returns NO_DATA if the packet content is shorter than the user datagram header.
117	* @returns ENOMEM if there is not enough memory left.	117	* @returns ENOMEM if there is not enough memory left.
118	* @returns EADDRNOTAVAIL if the destination socket does not exist.	118	* @returns EADDRNOTAVAIL if the destination socket does not exist.
119	* @returns Other error codes as defined for the ip_client_process_packet() function.	119	* @returns Other error codes as defined for the ip_client_process_packet() function.
120	*/	120	*/
121	int udp_process_packet( packet_t packet, services_t error );	121	int udp_process_packet( packet_t packet, services_t error );
122		122
123	/** Releases the packet and returns the result.	123	/** Releases the packet and returns the result.
124	* @param packet The packet queue to be released. Input parameter.	124	* @param packet The packet queue to be released. Input parameter.
125	* @param result The result to be returned. Input parameter.	125	* @param result The result to be returned. Input parameter.
126	* @return The result parameter.	126	* @return The result parameter.
127	*/	127	*/
128	int udp_release_and_return( packet_t packet, int result );	128	int udp_release_and_return( packet_t packet, int result );
129		129
130	/** @name Socket messages processing functions	130	/** @name Socket messages processing functions
131	*/	131	*/
132	/@{/	132	/@{/
133		133
134	/** Processes the socket client messages.	134	/** Processes the socket client messages.
135	* Runs until the client module disconnects.	135	* Runs until the client module disconnects.
136	* @param callid The message identifier. Input parameter.	136	* @param callid The message identifier. Input parameter.
137	* @param call The message parameters. Input parameter.	137	* @param call The message parameters. Input parameter.
138	* @returns EOK on success.	138	* @returns EOK on success.
139	* @see socket.h	139	* @see socket.h
140	*/	140	*/
141	int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call );	141	int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call );
142		142
143	/** Sends data from the socket to the remote address.	143	/** Sends data from the socket to the remote address.
144	* Binds the socket to a free port if not already connected/bound.	144	* Binds the socket to a free port if not already connected/bound.
145	* Handles the NET_SOCKET_SENDTO message.	145	* Handles the NET_SOCKET_SENDTO message.
146	* Supports AF_INET and AF_INET6 address families.	146	* Supports AF_INET and AF_INET6 address families.
147	* @param local_sockets The application local sockets. Input/output parameter.	147	* @param local_sockets The application local sockets. Input/output parameter.
148	* @param socket_id Socket identifier. Input parameter.	148	* @param socket_id Socket identifier. Input parameter.
149	* @param addr The destination address. Input parameter.	149	* @param addr The destination address. Input parameter.
150	* @param addrlen The address length. Input parameter.	150	* @param addrlen The address length. Input parameter.
151	* @param fragments The number of data fragments. Input parameter.	151	* @param fragments The number of data fragments. Input parameter.
152	* @param data_fragment_size The data fragment size in bytes. Input parameter.	152	* @param data_fragment_size The data fragment size in bytes. Input parameter.
153	* @param flags Various send flags. Input parameter.	153	* @param flags Various send flags. Input parameter.
154	* @returns EOK on success.	154	* @returns EOK on success.
155	* @returns EAFNOTSUPPORT if the address family is not supported.	155	* @returns EAFNOTSUPPORT if the address family is not supported.
156	* @returns ENOTSOCK if the socket is not found.	156	* @returns ENOTSOCK if the socket is not found.
157	* @returns EINVAL if the address is invalid.	157	* @returns EINVAL if the address is invalid.
158	* @returns ENOTCONN if the sending socket is not and cannot be bound.	158	* @returns ENOTCONN if the sending socket is not and cannot be bound.
159	* @returns ENOMEM if there is not enough memory left.	159	* @returns ENOMEM if there is not enough memory left.
160	* @returns Other error codes as defined for the socket_read_packet_data() function.	160	* @returns Other error codes as defined for the socket_read_packet_data() function.
161	* @returns Other error codes as defined for the ip_client_prepare_packet() function.	161	* @returns Other error codes as defined for the ip_client_prepare_packet() function.
162	* @returns Other error codes as defined for the ip_send_msg() function.	162	* @returns Other error codes as defined for the ip_send_msg() function.
163	*/	163	*/
164	int udp_sendto_message( socket_cores_ref local_sockets, int socket_id, const struct sockaddr * addr, socklen_t addrlen, int fragments, size_t data_fragment_size, int flags );	164	int udp_sendto_message( socket_cores_ref local_sockets, int socket_id, const struct sockaddr * addr, socklen_t addrlen, int fragments, size_t data_fragment_size, int flags );
165		165
166	/** Receives data to the socket.	166	/** Receives data to the socket.
167	* Handles the NET_SOCKET_RECVFROM message.	167	* Handles the NET_SOCKET_RECVFROM message.
168	* Replies the source address as well.	168	* Replies the source address as well.
169	* @param local_sockets The application local sockets. Input parameter.	169	* @param local_sockets The application local sockets. Input parameter.
170	* @param socket_id Socket identifier. Input parameter.	170	* @param socket_id Socket identifier. Input parameter.
171	* @param flags Various receive flags. Input parameter.	171	* @param flags Various receive flags. Input parameter.
172	* @param addrlen The source address length. Output parameter.	172	* @param addrlen The source address length. Output parameter.
173	* @returns The number of bytes received.	173	* @returns The number of bytes received.
174	* @returns ENOTSOCK if the socket is not found.	174	* @returns ENOTSOCK if the socket is not found.
175	* @returns NO_DATA if there are no received packets or data.	175	* @returns NO_DATA if there are no received packets or data.
176	* @returns ENOMEM if there is not enough memory left.	176	* @returns ENOMEM if there is not enough memory left.
177	* @returns EINVAL if the received address is not an IP address.	177	* @returns EINVAL if the received address is not an IP address.
178	* @returns Other error codes as defined for the packet_translate() function.	178	* @returns Other error codes as defined for the packet_translate() function.
179	* @returns Other error codes as defined for the data_reply() function.	179	* @returns Other error codes as defined for the data_reply() function.
180	*/	180	*/
181	int udp_recvfrom_message( socket_cores_ref local_sockets, int socket_id, int flags, size_t * addrlen );	181	int udp_recvfrom_message( socket_cores_ref local_sockets, int socket_id, int flags, size_t * addrlen );
182		182
183	/@}/	183	/@}/
184		184
185	/** UDP global data.	185	/** UDP global data.
186	*/	186	*/
187	udp_globals_t udp_globals;	187	udp_globals_t udp_globals;
188		188
189	int udp_initialize( async_client_conn_t client_connection ){	189	int udp_initialize( async_client_conn_t client_connection ){
190	ERROR_DECLARE;	190	ERROR_DECLARE;
191		191
192	measured_string_t names[] = {{ "UDP_CHECKSUM_COMPUTING", 22 }, { "UDP_AUTOBINDING", 15 }};	192	measured_string_t names[] = {{ "UDP_CHECKSUM_COMPUTING", 22 }, { "UDP_AUTOBINDING", 15 }};
193	measured_string_ref configuration;	193	measured_string_ref configuration;
194	size_t count = sizeof( names ) / sizeof( measured_string_t );	194	size_t count = sizeof( names ) / sizeof( measured_string_t );
195	char * data;	195	char * data;
196		196
197	fibril_rwlock_initialize( & udp_globals.lock );	197	fibril_rwlock_initialize( & udp_globals.lock );
198	fibril_rwlock_write_lock( & udp_globals.lock );	198	fibril_rwlock_write_lock( & udp_globals.lock );
199	udp_globals.icmp_phone = icmp_connect_module( SERVICE_ICMP );	199	udp_globals.icmp_phone = icmp_connect_module( SERVICE_ICMP );
200	if( udp_globals.icmp_phone < 0 ){	200	if( udp_globals.icmp_phone < 0 ){
201	return udp_globals.icmp_phone;	201	return udp_globals.icmp_phone;
202	}	202	}
203	udp_globals.ip_phone = ip_bind_service( SERVICE_IP, IPPROTO_UDP, SERVICE_UDP, client_connection, udp_received_msg );	203	udp_globals.ip_phone = ip_bind_service( SERVICE_IP, IPPROTO_UDP, SERVICE_UDP, client_connection, udp_received_msg );
204	if( udp_globals.ip_phone < 0 ){	204	if( udp_globals.ip_phone < 0 ){
205	return udp_globals.ip_phone;	205	return udp_globals.ip_phone;
206	}	206	}
207	ERROR_PROPAGATE( ip_packet_size_req( udp_globals.ip_phone, -1, & udp_globals.packet_dimension.addr_len, & udp_globals.packet_dimension.prefix, & udp_globals.packet_dimension.content, & udp_globals.packet_dimension.suffix ));	207	ERROR_PROPAGATE( ip_packet_size_req( udp_globals.ip_phone, -1, & udp_globals.packet_dimension.addr_len, & udp_globals.packet_dimension.prefix, & udp_globals.packet_dimension.content, & udp_globals.packet_dimension.suffix ));
208	ERROR_PROPAGATE( socket_ports_initialize( & udp_globals.sockets ));	208	ERROR_PROPAGATE( socket_ports_initialize( & udp_globals.sockets ));
209	udp_globals.packet_dimension.prefix += sizeof( udp_header_t );	209	udp_globals.packet_dimension.prefix += sizeof( udp_header_t );
210	udp_globals.packet_dimension.content -= sizeof( udp_header_t );	210	udp_globals.packet_dimension.content -= sizeof( udp_header_t );
211	udp_globals.last_used_port = UDP_FREE_PORTS_START - 1;	211	udp_globals.last_used_port = UDP_FREE_PORTS_START - 1;
212	// get configuration	212	// get configuration
213	udp_globals.checksum_computing = NET_DEFAULT_UDP_CHECKSUM_COMPUTING;	213	udp_globals.checksum_computing = NET_DEFAULT_UDP_CHECKSUM_COMPUTING;
214	udp_globals.autobinding = NET_DEFAULT_UDP_AUTOBINDING;	214	udp_globals.autobinding = NET_DEFAULT_UDP_AUTOBINDING;
215	configuration = & names[ 0 ];	215	configuration = & names[ 0 ];
216	ERROR_PROPAGATE( net_get_conf_req( udp_globals.net_phone, & configuration, count, & data ));	216	ERROR_PROPAGATE( net_get_conf_req( udp_globals.net_phone, & configuration, count, & data ));
217	if( configuration ){	217	if( configuration ){
218	if( configuration[ 0 ].value ){	218	if( configuration[ 0 ].value ){
219	udp_globals.checksum_computing = ( configuration[ 0 ].value[ 0 ] == 'y' );	219	udp_globals.checksum_computing = ( configuration[ 0 ].value[ 0 ] == 'y' );
220	}	220	}
221	if( configuration[ 1 ].value ){	221	if( configuration[ 1 ].value ){
222	udp_globals.autobinding = ( configuration[ 1 ].value[ 0 ] == 'y' );	222	udp_globals.autobinding = ( configuration[ 1 ].value[ 0 ] == 'y' );
223	}	223	}
224	net_free_settings( configuration, data );	224	net_free_settings( configuration, data );
225	}	225	}
226	fibril_rwlock_write_unlock( & udp_globals.lock );	226	fibril_rwlock_write_unlock( & udp_globals.lock );
227	return EOK;	227	return EOK;
228	}	228	}
229		229
230	int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error ){	230	int udp_received_msg( device_id_t device_id, packet_t packet, services_t receiver, services_t error ){
231	int result;	231	int result;
232		232
233	fibril_rwlock_read_lock( & udp_globals.lock );	233	fibril_rwlock_read_lock( & udp_globals.lock );
234	result = udp_process_packet( packet, error );	234	result = udp_process_packet( packet, error );
235	fibril_rwlock_read_unlock( & udp_globals.lock );	235	fibril_rwlock_read_unlock( & udp_globals.lock );
236		236
237	return result;	237	return result;
238	}	238	}
239		239
240	int udp_process_packet( packet_t packet, services_t error ){	240	int udp_process_packet( packet_t packet, services_t error ){
241	ERROR_DECLARE;	241	ERROR_DECLARE;
242		242
243	size_t length;	243	size_t length;
244	size_t offset;	244	size_t offset;
245	int result;	245	int result;
246	uint8_t * data;	-
247	udp_header_ref header;	246	udp_header_ref header;
248	socket_core_ref * socket;	247	socket_core_ref * socket;
249	packet_t next_packet;	248	packet_t next_packet;
250	size_t total_length;	249	size_t total_length;
251	uint32_t checksum;	250	uint32_t checksum;
252	int fragments;	251	int fragments;
253	packet_t tmp_packet;	252	packet_t tmp_packet;
254	icmp_type_t type;	253	icmp_type_t type;
255	icmp_code_t code;	254	icmp_code_t code;
256	ip_pseudo_header_ref ip_header;	255	ip_pseudo_header_ref ip_header;
257	struct sockaddr * src;	256	struct sockaddr * src;
258	struct sockaddr * dest;	257	struct sockaddr * dest;
259		258
260	if( error ){	259	if( error ){
261	switch( error ){	260	switch( error ){
262	case SERVICE_ICMP:	261	case SERVICE_ICMP:
263	// process error	262	// ignore error
264	// TODO remove debug dump	-
265	// length = icmp_client_header_length( packet );	263	// length = icmp_client_header_length( packet );
-		264	// process error
266	result = icmp_client_process_packet( packet, & type, & code, NULL, NULL );	265	result = icmp_client_process_packet( packet, & type, & code, NULL, NULL );
267	if( result < 0 ){	266	if( result < 0 ){
268	return udp_release_and_return( packet, result );	267	return udp_release_and_return( packet, result );
269	}	268	}
270	printf( "ICMP error %d (%d) in packet %d\n", type, code, packet_get_id( packet ) );	-
271	length = ( size_t ) result;	269	length = ( size_t ) result;
272	if( ERROR_OCCURRED( packet_trim( packet, length, 0 ))){	270	if( ERROR_OCCURRED( packet_trim( packet, length, 0 ))){
273	return udp_release_and_return( packet, ERROR_CODE );	271	return udp_release_and_return( packet, ERROR_CODE );
274	}	272	}
275	break;	273	break;
276	default:	274	default:
277	return udp_release_and_return( packet, ENOTSUP );	275	return udp_release_and_return( packet, ENOTSUP );
278	}	276	}
279	}	277	}
280	// TODO process received ipopts?	278	// TODO process received ipopts?
281	result = ip_client_process_packet( packet, NULL, NULL, NULL, NULL, NULL );	279	result = ip_client_process_packet( packet, NULL, NULL, NULL, NULL, NULL );
282	if( result < 0 ){	280	if( result < 0 ){
283	return udp_release_and_return( packet, result );	281	return udp_release_and_return( packet, result );
284	}	282	}
285	offset = ( size_t ) result;	283	offset = ( size_t ) result;
286		284
287	length = packet_get_data_length( packet );	285	length = packet_get_data_length( packet );
288	if( length <= 0 ){	286	if( length <= 0 ){
289	return udp_release_and_return( packet, EINVAL );	287	return udp_release_and_return( packet, EINVAL );
290	}	288	}
291	if( length < sizeof( udp_header_t ) + offset ){	289	if( length < sizeof( udp_header_t ) + offset ){
292	return udp_release_and_return( packet, NO_DATA );	290	return udp_release_and_return( packet, NO_DATA );
293	}	291	}
-		292
294	data = packet_get_data( packet );	293	// trim all but UDP header
295	if( ! data ){	294	if( ERROR_OCCURRED( packet_trim( packet, offset, 0 ))){
296	return udp_release_and_return( packet, NO_DATA );	295	return udp_release_and_return( packet, ERROR_CODE );
297	}	296	}
-		297
298	// get udp header	298	// get udp header
299	header = ( udp_header_ref )( data + offset );	299	header = ( udp_header_ref ) packet_get_data( packet );
-		300	if( ! header ){
-		301	return udp_release_and_return( packet, NO_DATA );
-		302	}
300	// find the destination socket	303	// find the destination socket
301	socket = socket_ports_find( & udp_globals.sockets, ntohs( header->destination_port ));	304	socket = socket_ports_find( & udp_globals.sockets, ntohs( header->destination_port ));
302	if( ! socket ){	305	if( ! socket ){
303	tl_send_icmp_port_unreachable( udp_globals.net_phone, udp_globals.icmp_phone, packet, error );	306	if( tl_prepare_icmp_packet( udp_globals.net_phone, udp_globals.icmp_phone, packet, error ) == EOK ){
-		307	icmp_destination_unreachable_msg( udp_globals.icmp_phone, ICMP_PORT_UNREACH, 0, packet );
-		308	}
304	return EADDRNOTAVAIL;	309	return EADDRNOTAVAIL;
305	}	310	}
306		311
307	// trim after successful processing to be able to send an ICMP error message!	-
308	ERROR_PROPAGATE( packet_trim( packet, offset, 0 ));	-
309		-
310	// count the received packet fragments	312	// count the received packet fragments
311	next_packet = packet;	313	next_packet = packet;
312	fragments = 0;	314	fragments = 0;
313	total_length = ntohs( header->total_length );	315	total_length = ntohs( header->total_length );
314	// compute header checksum if set	316	// compute header checksum if set
315	if( header->checksum && ( ! error )){	317	if( header->checksum && ( ! error )){
316	result = packet_get_addr( packet, ( uint8_t ) & src, ( uint8_t ) & dest );	318	result = packet_get_addr( packet, ( uint8_t ) & src, ( uint8_t ) & dest );
317	if( result <= 0 ){	319	if( result <= 0 ){
318	return udp_release_and_return( packet, result );	320	return udp_release_and_return( packet, result );
319	}	321	}
320	if( ERROR_OCCURRED( ip_client_get_pseudo_header( IPPROTO_UDP, src, result, dest, result, total_length, & ip_header, & length ))){	322	if( ERROR_OCCURRED( ip_client_get_pseudo_header( IPPROTO_UDP, src, result, dest, result, total_length, & ip_header, & length ))){
321	return udp_release_and_return( packet, ERROR_CODE );	323	return udp_release_and_return( packet, ERROR_CODE );
322	}else{	324	}else{
323	checksum = compute_checksum( 0, ip_header, length );	325	checksum = compute_checksum( 0, ip_header, length );
324	// the udp header checksum will be added with the first fragment later	326	// the udp header checksum will be added with the first fragment later
325	free( ip_header );	327	free( ip_header );
326	}	328	}
327	}else{	329	}else{
328	header->checksum = 0;	330	header->checksum = 0;
329	checksum = 0;	331	checksum = 0;
330	}	332	}
331		333
332	do{	334	do{
333	++ fragments;	335	++ fragments;
334	length = packet_get_data_length( next_packet );	336	length = packet_get_data_length( next_packet );
335	if( length <= 0 ){	337	if( length <= 0 ){
336	return udp_release_and_return( packet, NO_DATA );	338	return udp_release_and_return( packet, NO_DATA );
337	}	339	}
338	if( total_length < length ){	340	if( total_length < length ){
339	if( ERROR_OCCURRED( packet_trim( next_packet, 0, length - total_length ))){	341	if( ERROR_OCCURRED( packet_trim( next_packet, 0, length - total_length ))){
340	return udp_release_and_return( packet, ERROR_CODE );	342	return udp_release_and_return( packet, ERROR_CODE );
341	}	343	}
342	// add partial checksum if set	344	// add partial checksum if set
343	if( header->checksum ){	345	if( header->checksum ){
344	checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));	346	checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));
345	}	347	}
346	// relese the rest of the packet fragments	348	// relese the rest of the packet fragments
347	tmp_packet = pq_next( next_packet );	349	tmp_packet = pq_next( next_packet );
348	while( tmp_packet ){	350	while( tmp_packet ){
349	next_packet = pq_detach( tmp_packet );	351	next_packet = pq_detach( tmp_packet );
350	pq_release( udp_globals.net_phone, packet_get_id( tmp_packet ));	352	pq_release( udp_globals.net_phone, packet_get_id( tmp_packet ));
351	tmp_packet = next_packet;	353	tmp_packet = next_packet;
352	}	354	}
353	// exit the loop	355	// exit the loop
354	break;	356	break;
355	}	357	}
356	total_length -= length;	358	total_length -= length;
357	// add partial checksum if set	359	// add partial checksum if set
358	if( header->checksum ){	360	if( header->checksum ){
359	checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));	361	checksum = compute_checksum( checksum, packet_get_data( packet ), packet_get_data_length( packet ));
360	}	362	}
361	}while(( next_packet = pq_next( next_packet )) && ( total_length > 0 ));	363	}while(( next_packet = pq_next( next_packet )) && ( total_length > 0 ));
362		364
363	// check checksum	365	// check checksum
364	if( header->checksum ){	366	if( header->checksum ){
365	if( flip_checksum( compact_checksum( checksum ))){	367	if( flip_checksum( compact_checksum( checksum ))){
-		368	if( tl_prepare_icmp_packet( udp_globals.net_phone, udp_globals.icmp_phone, packet, error ) == EOK ){
366	// TODO checksum error ICMP?	369	// checksum error ICMP
367	// TODO remove debug dump	-
368	printf("udp check failed %x => %x\n", header->checksum, flip_checksum( compact_checksum( checksum )));	370	icmp_parameter_problem_msg( udp_globals.icmp_phone, ICMP_PARAM_POINTER, (( size_t ) (( void * ) & header->checksum )) - (( size_t ) (( void * ) header )), packet );
-		371	}
369	return udp_release_and_return( packet, EINVAL );	372	return EINVAL;
370	}	373	}
371	}	374	}
372		375
373	// queue the received packet	376	// queue the received packet
374	if( ERROR_OCCURRED( dyn_fifo_push( &( ** socket ).received, packet_get_id( packet ), SOCKET_MAX_RECEIVED_SIZE ))){	377	if( ERROR_OCCURRED( dyn_fifo_push( &( ** socket ).received, packet_get_id( packet ), SOCKET_MAX_RECEIVED_SIZE ))){
375	return udp_release_and_return( packet, ERROR_CODE );	378	return udp_release_and_return( packet, ERROR_CODE );
376	}	379	}
377		380
378	// notify the destination socket	381	// notify the destination socket
379	async_msg_5(( socket ).phone, NET_SOCKET_RECEIVED, ( ipcarg_t ) ( socket ).socket_id, 0, 0, 0, ( ipcarg_t ) fragments );	382	async_msg_5(( socket ).phone, NET_SOCKET_RECEIVED, ( ipcarg_t ) ( socket ).socket_id, 0, 0, 0, ( ipcarg_t ) fragments );
380	return EOK;	383	return EOK;
381	}	384	}
382		385
383	int udp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){	386	int udp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
384	ERROR_DECLARE;	387	ERROR_DECLARE;
385		388
386	packet_t packet;	389	packet_t packet;
387		390
388	* answer_count = 0;	391	* answer_count = 0;
389	switch( IPC_GET_METHOD( * call )){	392	switch( IPC_GET_METHOD( * call )){
390	case NET_TL_RECEIVED:	393	case NET_TL_RECEIVED:
391	if( ! ERROR_OCCURRED( packet_translate( udp_globals.net_phone, & packet, IPC_GET_PACKET( call )))){	394	if( ! ERROR_OCCURRED( packet_translate( udp_globals.net_phone, & packet, IPC_GET_PACKET( call )))){
392	ERROR_CODE = udp_received_msg( IPC_GET_DEVICE( call ), packet, SERVICE_UDP, IPC_GET_ERROR( call ));	395	ERROR_CODE = udp_received_msg( IPC_GET_DEVICE( call ), packet, SERVICE_UDP, IPC_GET_ERROR( call ));
393	}	396	}
394	return ERROR_CODE;	397	return ERROR_CODE;
395	case IPC_M_CONNECT_TO_ME:	398	case IPC_M_CONNECT_TO_ME:
396	return udp_process_client_messages( callid, * call );	399	return udp_process_client_messages( callid, * call );
397	}	400	}
398	return ENOTSUP;	401	return ENOTSUP;
399	}	402	}
400		403
401	int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call ){	404	int udp_process_client_messages( ipc_callid_t callid, ipc_call_t call ){
402	int res;	405	int res;
403	bool keep_on_going = true;	406	bool keep_on_going = true;
404	socket_cores_t local_sockets;	407	socket_cores_t local_sockets;
405	int app_phone = IPC_GET_PHONE( & call );	408	int app_phone = IPC_GET_PHONE( & call );
406	struct sockaddr * addr;	409	struct sockaddr * addr;
407	size_t addrlen;	410	size_t addrlen;
408	// fibril_rwlock_t lock;	411	// fibril_rwlock_t lock;
409	ipc_call_t answer;	412	ipc_call_t answer;
410	int answer_count;	413	int answer_count;
411		414
412	/*	415	/*
413	* Accept the connection	416	* Accept the connection
414	* - Answer the first IPC_M_CONNECT_ME_TO call.	417	* - Answer the first IPC_M_CONNECT_ME_TO call.
415	*/	418	*/
416	ipc_answer_0( callid, EOK );	419	ipc_answer_0( callid, EOK );
417		420
418	// The client connection is only in one fibril and therefore no additional locks are needed.	421	// The client connection is only in one fibril and therefore no additional locks are needed.
419		422
420	socket_cores_initialize( & local_sockets );	423	socket_cores_initialize( & local_sockets );
421	// fibril_rwlock_initialize( & lock );	424	// fibril_rwlock_initialize( & lock );
422		425
423	while( keep_on_going ){	426	while( keep_on_going ){
424	// refresh data	427	// refresh data
425	refresh_answer( & answer, & answer_count );	428	refresh_answer( & answer, & answer_count );
426		429
427	callid = async_get_call( & call );	430	callid = async_get_call( & call );
428	// printf( "message %d\n", IPC_GET_METHOD( * call ));	431	// printf( "message %d\n", IPC_GET_METHOD( * call ));
429		432
430	switch( IPC_GET_METHOD( call )){	433	switch( IPC_GET_METHOD( call )){
431	case IPC_M_PHONE_HUNGUP:	434	case IPC_M_PHONE_HUNGUP:
432	keep_on_going = false;	435	keep_on_going = false;
433	res = EOK;	436	res = EOK;
434	break;	437	break;
435	case NET_SOCKET:	438	case NET_SOCKET:
436	// fibril_rwlock_write_lock( & lock );	439	// fibril_rwlock_write_lock( & lock );
437	res = socket_create( & local_sockets, app_phone, NULL, SOCKET_SET_SOCKET_ID( answer ));	440	res = socket_create( & local_sockets, app_phone, NULL, SOCKET_SET_SOCKET_ID( answer ));
438	// fibril_rwlock_write_unlock( & lock );	441	// fibril_rwlock_write_unlock( & lock );
-		442	// TODO max fragment size
439	* SOCKET_SET_DATA_FRAGMENT_SIZE( answer ) = MAX_UDP_FRAGMENT_SIZE;	443	* SOCKET_SET_DATA_FRAGMENT_SIZE( answer ) = MAX_UDP_FRAGMENT_SIZE;
440	* SOCKET_SET_HEADER_SIZE( answer ) = sizeof( udp_header_t );	444	* SOCKET_SET_HEADER_SIZE( answer ) = sizeof( udp_header_t );
441	answer_count = 3;	445	answer_count = 3;
442	break;	446	break;
443	case NET_SOCKET_BIND:	447	case NET_SOCKET_BIND:
444	res = data_receive(( void ** ) & addr, & addrlen );	448	res = data_receive(( void ** ) & addr, & addrlen );
445	if( res == EOK ){	449	if( res == EOK ){
446	// fibril_rwlock_write_lock( & lock );	450	// fibril_rwlock_write_lock( & lock );
447	fibril_rwlock_write_lock( & udp_globals.lock );	451	fibril_rwlock_write_lock( & udp_globals.lock );
448	res = socket_bind( & local_sockets, & udp_globals.sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, UDP_FREE_PORTS_START, UDP_FREE_PORTS_END, udp_globals.last_used_port );	452	res = socket_bind( & local_sockets, & udp_globals.sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, UDP_FREE_PORTS_START, UDP_FREE_PORTS_END, udp_globals.last_used_port );
449	fibril_rwlock_write_unlock( & udp_globals.lock );	453	fibril_rwlock_write_unlock( & udp_globals.lock );
450	// fibril_rwlock_write_unlock( & lock );	454	// fibril_rwlock_write_unlock( & lock );
451	free( addr );	455	free( addr );
452	}	456	}
453	break;	457	break;
454	case NET_SOCKET_SENDTO:	458	case NET_SOCKET_SENDTO:
455	res = data_receive(( void ** ) & addr, & addrlen );	459	res = data_receive(( void ** ) & addr, & addrlen );
456	if( res == EOK ){	460	if( res == EOK ){
457	// fibril_rwlock_read_lock( & lock );	461	// fibril_rwlock_read_lock( & lock );
458	fibril_rwlock_read_lock( & udp_globals.lock );	462	fibril_rwlock_read_lock( & udp_globals.lock );
459	res = udp_sendto_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, SOCKET_GET_DATA_FRAGMENTS( call ), SOCKET_GET_DATA_FRAGMENT_SIZE( call ), SOCKET_GET_FLAGS( call ));	463	res = udp_sendto_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), addr, addrlen, SOCKET_GET_DATA_FRAGMENTS( call ), SOCKET_GET_DATA_FRAGMENT_SIZE( call ), SOCKET_GET_FLAGS( call ));
460	fibril_rwlock_read_unlock( & udp_globals.lock );	464	fibril_rwlock_read_unlock( & udp_globals.lock );
461	// fibril_rwlock_read_unlock( & lock );	465	// fibril_rwlock_read_unlock( & lock );
462	free( addr );	466	free( addr );
463	}	467	}
464	break;	468	break;
465	case NET_SOCKET_RECVFROM:	469	case NET_SOCKET_RECVFROM:
466	// fibril_rwlock_read_lock( & lock );	470	// fibril_rwlock_read_lock( & lock );
467	fibril_rwlock_read_lock( & udp_globals.lock );	471	fibril_rwlock_read_lock( & udp_globals.lock );
468	res = udp_recvfrom_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), SOCKET_GET_FLAGS( call ), & addrlen );	472	res = udp_recvfrom_message( & local_sockets, SOCKET_GET_SOCKET_ID( call ), SOCKET_GET_FLAGS( call ), & addrlen );
469	fibril_rwlock_read_unlock( & udp_globals.lock );	473	fibril_rwlock_read_unlock( & udp_globals.lock );
470	// fibril_rwlock_read_unlock( & lock );	474	// fibril_rwlock_read_unlock( & lock );
471	if( res > 0 ){	475	if( res > 0 ){
472	* SOCKET_SET_READ_DATA_LENGTH( answer ) = res;	476	* SOCKET_SET_READ_DATA_LENGTH( answer ) = res;
473	* SOCKET_SET_ADDRESS_LENGTH( answer ) = addrlen;	477	* SOCKET_SET_ADDRESS_LENGTH( answer ) = addrlen;
474	answer_count = 2;	478	answer_count = 2;
475	res = EOK;	479	res = EOK;
476	}	480	}
477	break;	481	break;
478	case NET_SOCKET_CLOSE:	482	case NET_SOCKET_CLOSE:
479	// fibril_rwlock_write_lock( & lock );	483	// fibril_rwlock_write_lock( & lock );
480	fibril_rwlock_write_lock( & udp_globals.lock );	484	fibril_rwlock_write_lock( & udp_globals.lock );
481	res = socket_destroy( udp_globals.net_phone, SOCKET_GET_SOCKET_ID( call ), & local_sockets, & udp_globals.sockets );	485	res = socket_destroy( udp_globals.net_phone, SOCKET_GET_SOCKET_ID( call ), & local_sockets, & udp_globals.sockets );
482	fibril_rwlock_write_unlock( & udp_globals.lock );	486	fibril_rwlock_write_unlock( & udp_globals.lock );
483	// fibril_rwlock_write_unlock( & lock );	487	// fibril_rwlock_write_unlock( & lock );
484	break;	488	break;
485	case NET_SOCKET_GETSOCKOPT:	489	case NET_SOCKET_GETSOCKOPT:
486	case NET_SOCKET_SETSOCKOPT:	490	case NET_SOCKET_SETSOCKOPT:
487	default:	491	default:
488	res = ENOTSUP;	492	res = ENOTSUP;
489	break;	493	break;

Subversion Repositories HelenOS

(root)/branches/network/uspace/srv/net/tl/udp/udp.c – Rev 4730 → 4731